{"id":1511,"date":"2025-03-24T08:50:33","date_gmt":"2025-03-23T23:50:33","guid":{"rendered":"https:\/\/dexall.co.jp\/articles\/?p=1511"},"modified":"2025-03-24T08:50:33","modified_gmt":"2025-03-23T23:50:33","slug":"%e3%80%90%e4%bf%9d%e5%ad%98%e7%89%88%e3%80%91rubycue%e3%81%a7%e5%ae%9f%e7%8f%be%e3%81%99%e3%82%8b%e5%a0%85%e5%ae%9f%e3%81%aa%e3%82%a8%e3%83%a9%e3%83%bc%e3%83%8f%e3%83%b3%e3%83%89%e3%83%aa%e3%83%b3","status":"publish","type":"post","link":"https:\/\/dexall.co.jp\/articles\/?p=1511","title":{"rendered":"\u3010\u4fdd\u5b58\u7248\u3011Rubycue\u3067\u5b9f\u73fe\u3059\u308b\u5805\u5b9f\u306a\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0 7\u3064\u306e\u5b9f\u8df5\u30c6\u30af\u30cb\u30c3\u30af"},"content":{"rendered":"\n<div class=\"toc\"><br \/>\n<b>Warning<\/b>:  Undefined array key \"is_admin\" in <b>\/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/sango-theme\/library\/gutenberg\/dist\/classes\/Toc.php<\/b> on line <b>116<\/b><br \/>\n<br \/>\n<b>Warning<\/b>:  Undefined array key \"is_category_top\" in <b>\/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/sango-theme\/library\/gutenberg\/dist\/classes\/Toc.php<\/b> on line <b>121<\/b><br \/>\n<br \/>\n<b>Warning<\/b>:  Undefined array key \"is_top\" in <b>\/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/sango-theme\/library\/gutenberg\/dist\/classes\/Toc.php<\/b> on line <b>128<\/b><br \/>\n    <div id=\"toc_container\" class=\"sgb-toc--bullets js-smooth-scroll\" data-dialog-title=\"\u76ee\u6b21\">\n      <p class=\"toc_title\">\u76ee\u6b21 <\/p>\n      <ul class=\"toc_list\">  <li class=\"first\">    <a href=\"#i-0\">Ruby\u306e\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u306e\u57fa\u790e\u77e5\u8b58<\/a>  <\/li>  <li>    <a href=\"#i-1\">rescue\u304c\u5fc5\u8981\u306a\u7406\u7531\u3068\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9<\/a>  <\/li>  <li>    <a href=\"#i-2\">Ruby\u306b\u5b9f\u88c5\u3055\u308c\u3066\u3044\u308b\u4e3b\u8981\u4f8b\u5916\u30af\u30e9\u30b9<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-3\">\u4f8b\u5916\u30af\u30e9\u30b9\u306e\u968e\u5c64\u69cb\u9020<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-4\">\u4e3b\u8981\u306a\u4f8b\u5916\u30af\u30e9\u30b9\u306e\u4f7f\u7528\u4f8b<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-5\">Ruby\u306e\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u306e\u57fa\u790e\u77e5\u8b58<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-6\">rescue\u304c\u5fc5\u8981\u306a\u7406\u7531\u3068\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-7\">Ruby\u306b\u5b9f\u88c5\u3055\u308c\u3066\u3044\u308b\u4e3b\u8981\u4f8b\u5916\u30af\u30e9\u30b9<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-10\">rescueblock\u51e6\u7406\u306e\u52b9\u679c\u7684\u306a\u5b9f\u88c5\u30d1\u30bf\u30fc\u30f3<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-11\">\u57fa\u672c\u7684\u306arescue\u69cb\u6587\u306e\u66f8\u304d\u65b9<\/a>      <\/li>      <li>        <a href=\"#i-12\">\u8907\u6570\u306e\u4f8b\u5916\u3092\u500b\u5225\u306b\u6271\u3046\u65b9\u6cd5<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-13\">else\u53e5\u3068ensure\u53e5\u306e\u9069\u5207\u306a\u4f7f\u7528\u65b9\u6cd5<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-14\">7\u3064\u306e\u5b9f\u8df5\u7684\u306a\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u30c6\u30af\u30cb\u30c3\u30af<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-15\">\u30c6\u30af\u30cb\u30c3\u30af1\uff1a\u4f8b\u5916\u30af\u30e9\u30b9\u306e\u7d99\u627f\u3092\u6d3b\u7528\u3057\u305f\u51e6\u7406<\/a>      <\/li>      <li>        <a href=\"#i-16\">\u30c6\u30af\u30cb\u30c3\u30af2\uff1aretry\u6a5f\u80fd\u3092\u4f7f\u7528\u3057\u305f\u81ea\u52d5\u30ea\u30ab\u30d0\u30ea\u30fc<\/a>      <\/li>      <li>        <a href=\"#i-17\">\u30c6\u30af\u30cb\u30c3\u30af3\uff1abegin-rescue\u306e\u30b9\u30b3\u30fc\u30d7\u6700\u9069\u5316<\/a>      <\/li>      <li>        <a href=\"#i-18\">\u30c6\u30af\u30cb\u30c3\u30af4\uff1a\u4f8b\u5916\u60c5\u5831\u306e\u52b9\u679c\u7684\u306a\u30ed\u30b0\u8a18\u9332<\/a>      <\/li>      <li>        <a href=\"#i-19\">\u30c6\u30af\u30cb\u30c3\u30af5\uff1a\u30ab\u30b9\u30bf\u30e0\u4f8b\u5916\u30af\u30e9\u30b9\u306e\u8a2d\u8a08\u3068\u6d3b\u7528<\/a>      <\/li>      <li>        <a href=\"#i-20\">\u30c6\u30af\u30cb\u30c3\u30af6\uff1arescue\u4fee\u98fe\u5b50\u3092\u4f7f\u3063\u305f\u30b7\u30f3\u30d7\u30eb\u306a\u5b9f\u88c5<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-21\">\u30c6\u30af\u30cb\u30c3\u30af7\uff1araise\/rescue\u306b\u3088\u308b\u4f8b\u5916\u306e\u518d\u9001\u4fe1<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-22\">\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-23\">\u7121\u99c4\u306a\u4f8b\u5916\u51e6\u7406\u3092\u907f\u3051\u308b\u305f\u3081\u306e\u8a2d\u8a08\u6307\u91dd<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-26\">\u30c6\u30b9\u30c8\u306e\u53ef\u80fd\u6027\u3092\u8003\u616e\u3057\u305frescue\u306e\u5b9f\u88c5\u65b9\u6cd5<\/a>      <\/li>    <\/ul>  <\/li>  <li class=\"last\">    <a href=\"#i-30\">\u5b9f\u969b\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u3088\u304f\u3042\u308b\u30a8\u30e9\u30fc\u3068\u305d\u306e\u5bfe\u51e6\u6cd5<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-31\">\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u64cd\u4f5c\u6642\u306e\u4f8b\u5916\u51e6\u7406\u30d1\u30bf\u30fc\u30f3<\/a>      <\/li>      <li>        <a href=\"#i-32\">\u5916\u90e8API\u3068\u9023\u643a\u6642\u306e\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-33\">\u4e26\u884c\u51e6\u7406\u306b\u304a\u3051\u308b\u4f8b\u5916\u51e6\u7406\u306e\u6ce8\u610f\u70b9<\/a>      <\/li>    <\/ul>  <\/li><\/ul>\n      <a href=\"#\" class=\"sgb-toc-button js-toc-button\" rel=\"nofollow\" data-open-dialog=\"true\"><i class=\"fa fa-list\"><\/i><span class=\"sgb-toc-button__text\">\u76ee\u6b21\u3078<\/span><\/a>\n    <\/div><\/div><h2 class=\"wp-block-heading\" id=\"i-0\">Ruby\u306e\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u306e\u57fa\u790e\u77e5\u8b58<\/h2>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-1\">rescue\u304c\u5fc5\u8981\u306a\u7406\u7531\u3068\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9<\/h2>\n\n\n\n<p>\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u5b9f\u884c\u4e2d\u306b\u4e88\u671f\u305b\u306c\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3059\u308b\u3053\u3068\u306f\u907f\u3051\u3089\u308c\u307e\u305b\u3093\u3002\u30d5\u30a1\u30a4\u30eb\u306e\u8aad\u307f\u8fbc\u307f\u306b\u5931\u6557\u3057\u305f\u308a\u3001API\u304b\u3089\u306e\u5fdc\u7b54\u304c\u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\u3057\u305f\u308a\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3078\u306e\u63a5\u7d9a\u304c\u5207\u65ad\u3055\u308c\u305f\u308a\u3059\u308b\u53ef\u80fd\u6027\u306f\u5e38\u306b\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u30a8\u30e9\u30fc\u3092\u9069\u5207\u306b\u51e6\u7406\u305b\u305a\u306b\u30d7\u30ed\u30b0\u30e9\u30e0\u304c\u7a81\u7136\u505c\u6b62\u3057\u3066\u3057\u307e\u3046\u3068\u3001\u30e6\u30fc\u30b6\u30fc\u4f53\u9a13\u304c\u8457\u3057\u304f\u640d\u306a\u308f\u308c\u3001\u30c7\u30fc\u30bf\u306e\u6574\u5408\u6027\u304c\u5931\u308f\u308c\u308b\u53ef\u80fd\u6027\u3082\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u305d\u3053\u3067\u91cd\u8981\u306b\u306a\u308b\u306e\u304c<code>rescue<\/code>\u3092\u4f7f\u7528\u3057\u305f\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u3067\u3059\u3002\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u5229\u70b9\u304c\u3042\u308a\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u5805\u7262\u6027\u5411\u4e0a<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u3066\u3082\u9069\u5207\u306b\u51e6\u7406\u3092\u7d99\u7d9a<\/li>\n\n\n\n<li>\u30e6\u30fc\u30b6\u30fc\u3078\u306e\u9069\u5207\u306a\u30d5\u30a3\u30fc\u30c9\u30d0\u30c3\u30af\u63d0\u4f9b<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30c7\u30d0\u30c3\u30b0\u306e\u52b9\u7387\u5316<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30a8\u30e9\u30fc\u306e\u767a\u751f\u7b87\u6240\u3068\u539f\u56e0\u306e\u7279\u5b9a\u304c\u5bb9\u6613<\/li>\n\n\n\n<li>\u30ed\u30b0\u306b\u3088\u308b\u30a8\u30e9\u30fc\u8ffd\u8de1\u304c\u53ef\u80fd<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30e6\u30fc\u30b6\u30fc\u4f53\u9a13\u306e\u5411\u4e0a<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30a8\u30e9\u30fc\u6642\u306e\u4ee3\u66ff\u51e6\u7406\u306e\u63d0\u4f9b<\/li>\n\n\n\n<li>\u308f\u304b\u308a\u3084\u3059\u3044\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u8868\u793a<\/li>\n<\/ul>\n\n\n\n<p>\u57fa\u672c\u7684\u306a\u4f7f\u7528\u4f8b\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\"># \u57fa\u672c\u7684\u306arescue\u306e\u4f7f\u7528\u4f8b\nbegin\n  # \u30a8\u30e9\u30fc\u304c\u767a\u751f\u3059\u308b\u53ef\u80fd\u6027\u306e\u3042\u308b\u51e6\u7406\n  result = potentially_dangerous_operation()\nrescue StandardError =&gt; e\n  # \u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u305f\u5834\u5408\u306e\u51e6\u7406\n  logger.error(\"\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u307e\u3057\u305f: #{e.message}\")\n  # \u4ee3\u66ff\u306e\u51e6\u7406\u3084\u9069\u5207\u306a\u30d5\u30a3\u30fc\u30c9\u30d0\u30c3\u30af\n  notify_user(\"\u51e6\u7406\u306b\u5931\u6557\u3057\u307e\u3057\u305f\")\nend\n\n# \u30e1\u30bd\u30c3\u30c9\u5b9a\u7fa9\u5185\u3067\u306erescue\ndef safe_operation\n  # \u5371\u967a\u306a\u51e6\u7406\n  result = risky_operation()\nrescue StandardError =&gt; e\n  # \u30a8\u30e9\u30fc\u51e6\u7406\n  handle_error(e)\nelse\n  # \u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u306a\u304b\u3063\u305f\u5834\u5408\u306e\u51e6\u7406\n  success_operation()\nensure\n  # \u5fc5\u305a\u5b9f\u884c\u3055\u308c\u308b\u51e6\u7406\n  cleanup_resources()\nend<\/pre>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-2\">Ruby\u306b\u5b9f\u88c5\u3055\u308c\u3066\u3044\u308b\u4e3b\u8981\u4f8b\u5916\u30af\u30e9\u30b9<\/h2>\n\n\n\n<p>Ruby\u306b\u306f\u69d8\u3005\u306a\u4f8b\u5916\u30af\u30e9\u30b9\u304c\u5b9f\u88c5\u3055\u308c\u3066\u304a\u308a\u3001\u968e\u5c64\u69cb\u9020\u3092\u6301\u3063\u3066\u3044\u307e\u3059\u3002\u4e3b\u8981\u306a\u4f8b\u5916\u30af\u30e9\u30b9\u3068\u305d\u306e\u7528\u9014\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u9069\u5207\u306a\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-3\">\u4f8b\u5916\u30af\u30e9\u30b9\u306e\u968e\u5c64\u69cb\u9020<\/h3>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">Exception\n  \u251c\u2500\u2500 NoMemoryError        # \u30e1\u30e2\u30ea\u4e0d\u8db3\n  \u251c\u2500\u2500 ScriptError         \n  \u2502   \u251c\u2500\u2500 LoadError       # \u30e9\u30a4\u30d6\u30e9\u30ea\u8aad\u307f\u8fbc\u307f\u30a8\u30e9\u30fc\n  \u2502   \u251c\u2500\u2500 NotImplementedError\n  \u2502   \u2514\u2500\u2500 SyntaxError     # \u6587\u6cd5\u30a8\u30e9\u30fc\n  \u2514\u2500\u2500 StandardError       # \u901a\u5e38\u306e\u30d7\u30ed\u30b0\u30e9\u30e0\u30a8\u30e9\u30fc\n      \u251c\u2500\u2500 ArgumentError   # \u5f15\u6570\u95a2\u9023\u306e\u30a8\u30e9\u30fc\n      \u251c\u2500\u2500 IndexError      # \u914d\u5217\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u30a8\u30e9\u30fc\n      \u251c\u2500\u2500 NameError       # \u672a\u5b9a\u7fa9\u306e\u5909\u6570\/\u30e1\u30bd\u30c3\u30c9\n      \u251c\u2500\u2500 NoMethodError   # \u30e1\u30bd\u30c3\u30c9\u672a\u5b9a\u7fa9\n      \u251c\u2500\u2500 RangeError     # \u7bc4\u56f2\u5916\u306e\u5024\n      \u251c\u2500\u2500 RuntimeError    # \u30c7\u30d5\u30a9\u30eb\u30c8\u306e\u30a8\u30e9\u30fc\n      \u2514\u2500\u2500 TypeError      # \u578b\u306e\u4e0d\u4e00\u81f4<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-4\">\u4e3b\u8981\u306a\u4f8b\u5916\u30af\u30e9\u30b9\u306e\u4f7f\u7528\u4f8b<\/h3>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\"># ArgumentError\ndef greet(name)\n  raise ArgumentError, \"\u540d\u524d\u3092\u5165\u529b\u3057\u3066\u304f\u3060\u3055\u3044\" if name.nil?\n  puts \"Hello, #{name}!\"\nend\n\n# NoMethodError\nbegin\n  undefined_object.undefined_method\nrescue NoMethodError =&gt; e\n  puts \"\u672a\u5b9a\u7fa9\u306e\u30e1\u30bd\u30c3\u30c9\u304c\u547c\u3073\u51fa\u3055\u308c\u307e\u3057\u305f: #{e.message}\"\nend\n\n# TypeError\nbegin\n  \"string\" + 1  # \u6587\u5b57\u5217\u3068\u6570\u5024\u306e\u52a0\u7b97\nrescue TypeError =&gt; e\n  puts \"\u578b\u306e\u4e0d\u4e00\u81f4\u304c\u767a\u751f\u3057\u307e\u3057\u305f: #{e.message}\"\nend\n\n# \u30ab\u30b9\u30bf\u30e0\u4f8b\u5916\u306e\u5b9a\u7fa9\nclass CustomError &lt; StandardError\n  def initialize(msg = \"\u30ab\u30b9\u30bf\u30e0\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u307e\u3057\u305f\")\n    super\n  end\nend<\/pre>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u4f8b\u5916\u30af\u30e9\u30b9\u3092\u9069\u5207\u306b\u4f7f\u3044\u5206\u3051\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u5177\u4f53\u7684\u306a\u30a8\u30e9\u30fc\u51e6\u7406\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002\u7279\u306b\u91cd\u8981\u306a\u306e\u306f\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><code>StandardError<\/code>\u3068\u305d\u306e\u30b5\u30d6\u30af\u30e9\u30b9\u304c\u6700\u3082\u4e00\u822c\u7684\u306b\u4f7f\u7528\u3055\u308c\u308b<\/li>\n\n\n\n<li><code>rescue<\/code>\u7bc0\u3067\u4f8b\u5916\u30af\u30e9\u30b9\u3092\u6307\u5b9a\u3057\u306a\u3044\u5834\u5408\u306f<code>StandardError<\/code>\u304c\u6355\u6349\u3055\u308c\u308b<\/li>\n\n\n\n<li>\u30ab\u30b9\u30bf\u30e0\u4f8b\u5916\u306f\u901a\u5e38<code>StandardError<\/code>\u3092\u7d99\u627f\u3057\u3066\u4f5c\u6210\u3059\u308b<\/li>\n<\/ol>\n\n\n\n<p>\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u306e\u57fa\u672c\u3092\u62bc\u3055\u3048\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u4fe1\u983c\u6027\u306e\u9ad8\u3044\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u4f5c\u6210\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-5\">Ruby\u306e\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u306e\u57fa\u790e\u77e5\u8b58<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-6\">rescue\u304c\u5fc5\u8981\u306a\u7406\u7531\u3068\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9<\/h3>\n\n\n\n<p>\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u5b9f\u884c\u4e2d\u306b\u4e88\u671f\u305b\u306c\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3059\u308b\u3053\u3068\u306f\u907f\u3051\u3089\u308c\u307e\u305b\u3093\u3002\u30d5\u30a1\u30a4\u30eb\u306e\u8aad\u307f\u8fbc\u307f\u306b\u5931\u6557\u3057\u305f\u308a\u3001API\u304b\u3089\u306e\u5fdc\u7b54\u304c\u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\u3057\u305f\u308a\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3078\u306e\u63a5\u7d9a\u304c\u5207\u65ad\u3055\u308c\u305f\u308a\u3059\u308b\u53ef\u80fd\u6027\u306f\u5e38\u306b\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u30a8\u30e9\u30fc\u3092\u9069\u5207\u306b\u51e6\u7406\u305b\u305a\u306b\u30d7\u30ed\u30b0\u30e9\u30e0\u304c\u7a81\u7136\u505c\u6b62\u3057\u3066\u3057\u307e\u3046\u3068\u3001\u30e6\u30fc\u30b6\u30fc\u4f53\u9a13\u304c\u8457\u3057\u304f\u640d\u306a\u308f\u308c\u3001\u30c7\u30fc\u30bf\u306e\u6574\u5408\u6027\u304c\u5931\u308f\u308c\u308b\u53ef\u80fd\u6027\u3082\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u305d\u3053\u3067\u91cd\u8981\u306b\u306a\u308b\u306e\u304c<code>rescue<\/code>\u3092\u4f7f\u7528\u3057\u305f\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u3067\u3059\u3002\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u5229\u70b9\u304c\u3042\u308a\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u5805\u7262\u6027\u5411\u4e0a<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u3066\u3082\u9069\u5207\u306b\u51e6\u7406\u3092\u7d99\u7d9a<\/li>\n\n\n\n<li>\u30e6\u30fc\u30b6\u30fc\u3078\u306e\u9069\u5207\u306a\u30d5\u30a3\u30fc\u30c9\u30d0\u30c3\u30af\u63d0\u4f9b<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30c7\u30d0\u30c3\u30b0\u306e\u52b9\u7387\u5316<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30a8\u30e9\u30fc\u306e\u767a\u751f\u7b87\u6240\u3068\u539f\u56e0\u306e\u7279\u5b9a\u304c\u5bb9\u6613<\/li>\n\n\n\n<li>\u30ed\u30b0\u306b\u3088\u308b\u30a8\u30e9\u30fc\u8ffd\u8de1\u304c\u53ef\u80fd<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30e6\u30fc\u30b6\u30fc\u4f53\u9a13\u306e\u5411\u4e0a<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30a8\u30e9\u30fc\u6642\u306e\u4ee3\u66ff\u51e6\u7406\u306e\u63d0\u4f9b<\/li>\n\n\n\n<li>\u308f\u304b\u308a\u3084\u3059\u3044\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u8868\u793a<\/li>\n<\/ul>\n\n\n\n<p>\u57fa\u672c\u7684\u306a\u4f7f\u7528\u4f8b\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\"># \u57fa\u672c\u7684\u306arescue\u306e\u4f7f\u7528\u4f8b\nbegin\n  # \u30a8\u30e9\u30fc\u304c\u767a\u751f\u3059\u308b\u53ef\u80fd\u6027\u306e\u3042\u308b\u51e6\u7406\n  result = potentially_dangerous_operation()\nrescue StandardError =&gt; e\n  # \u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u305f\u5834\u5408\u306e\u51e6\u7406\n  logger.error(\"\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u307e\u3057\u305f: #{e.message}\")\n  # \u4ee3\u66ff\u306e\u51e6\u7406\u3084\u9069\u5207\u306a\u30d5\u30a3\u30fc\u30c9\u30d0\u30c3\u30af\n  notify_user(\"\u51e6\u7406\u306b\u5931\u6557\u3057\u307e\u3057\u305f\")\nend\n\n# \u30e1\u30bd\u30c3\u30c9\u5b9a\u7fa9\u5185\u3067\u306erescue\ndef safe_operation\n  # \u5371\u967a\u306a\u51e6\u7406\n  result = risky_operation()\nrescue StandardError =&gt; e\n  # \u30a8\u30e9\u30fc\u51e6\u7406\n  handle_error(e)\nelse\n  # \u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u306a\u304b\u3063\u305f\u5834\u5408\u306e\u51e6\u7406\n  success_operation()\nensure\n  # \u5fc5\u305a\u5b9f\u884c\u3055\u308c\u308b\u51e6\u7406\n  cleanup_resources()\nend<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-7\">Ruby\u306b\u5b9f\u88c5\u3055\u308c\u3066\u3044\u308b\u4e3b\u8981\u4f8b\u5916\u30af\u30e9\u30b9<\/h3>\n\n\n\n<p>Ruby\u306b\u306f\u69d8\u3005\u306a\u4f8b\u5916\u30af\u30e9\u30b9\u304c\u5b9f\u88c5\u3055\u308c\u3066\u304a\u308a\u3001\u968e\u5c64\u69cb\u9020\u3092\u6301\u3063\u3066\u3044\u307e\u3059\u3002\u4e3b\u8981\u306a\u4f8b\u5916\u30af\u30e9\u30b9\u3068\u305d\u306e\u7528\u9014\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u9069\u5207\u306a\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-8\">\u4f8b\u5916\u30af\u30e9\u30b9\u306e\u968e\u5c64\u69cb\u9020<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">Exception\n  \u251c\u2500\u2500 NoMemoryError        # \u30e1\u30e2\u30ea\u4e0d\u8db3\n  \u251c\u2500\u2500 ScriptError         \n  \u2502   \u251c\u2500\u2500 LoadError       # \u30e9\u30a4\u30d6\u30e9\u30ea\u8aad\u307f\u8fbc\u307f\u30a8\u30e9\u30fc\n  \u2502   \u251c\u2500\u2500 NotImplementedError\n  \u2502   \u2514\u2500\u2500 SyntaxError     # \u6587\u6cd5\u30a8\u30e9\u30fc\n  \u2514\u2500\u2500 StandardError       # \u901a\u5e38\u306e\u30d7\u30ed\u30b0\u30e9\u30e0\u30a8\u30e9\u30fc\n      \u251c\u2500\u2500 ArgumentError   # \u5f15\u6570\u95a2\u9023\u306e\u30a8\u30e9\u30fc\n      \u251c\u2500\u2500 IndexError      # \u914d\u5217\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u30a8\u30e9\u30fc\n      \u251c\u2500\u2500 NameError       # \u672a\u5b9a\u7fa9\u306e\u5909\u6570\/\u30e1\u30bd\u30c3\u30c9\n      \u251c\u2500\u2500 NoMethodError   # \u30e1\u30bd\u30c3\u30c9\u672a\u5b9a\u7fa9\n      \u251c\u2500\u2500 RangeError     # \u7bc4\u56f2\u5916\u306e\u5024\n      \u251c\u2500\u2500 RuntimeError    # \u30c7\u30d5\u30a9\u30eb\u30c8\u306e\u30a8\u30e9\u30fc\n      \u2514\u2500\u2500 TypeError      # \u578b\u306e\u4e0d\u4e00\u81f4<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-9\">\u4e3b\u8981\u306a\u4f8b\u5916\u30af\u30e9\u30b9\u306e\u4f7f\u7528\u4f8b<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\"># ArgumentError\ndef greet(name)\n  raise ArgumentError, \"\u540d\u524d\u3092\u5165\u529b\u3057\u3066\u304f\u3060\u3055\u3044\" if name.nil?\n  puts \"Hello, #{name}!\"\nend\n\n# NoMethodError\nbegin\n  undefined_object.undefined_method\nrescue NoMethodError =&gt; e\n  puts \"\u672a\u5b9a\u7fa9\u306e\u30e1\u30bd\u30c3\u30c9\u304c\u547c\u3073\u51fa\u3055\u308c\u307e\u3057\u305f: #{e.message}\"\nend\n\n# TypeError\nbegin\n  \"string\" + 1  # \u6587\u5b57\u5217\u3068\u6570\u5024\u306e\u52a0\u7b97\nrescue TypeError =&gt; e\n  puts \"\u578b\u306e\u4e0d\u4e00\u81f4\u304c\u767a\u751f\u3057\u307e\u3057\u305f: #{e.message}\"\nend\n\n# \u30ab\u30b9\u30bf\u30e0\u4f8b\u5916\u306e\u5b9a\u7fa9\nclass CustomError &lt; StandardError\n  def initialize(msg = \"\u30ab\u30b9\u30bf\u30e0\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u307e\u3057\u305f\")\n    super\n  end\nend<\/pre>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u4f8b\u5916\u30af\u30e9\u30b9\u3092\u9069\u5207\u306b\u4f7f\u3044\u5206\u3051\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u5177\u4f53\u7684\u306a\u30a8\u30e9\u30fc\u51e6\u7406\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002\u7279\u306b\u91cd\u8981\u306a\u306e\u306f\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><code>StandardError<\/code>\u3068\u305d\u306e\u30b5\u30d6\u30af\u30e9\u30b9\u304c\u6700\u3082\u4e00\u822c\u7684\u306b\u4f7f\u7528\u3055\u308c\u308b<\/li>\n\n\n\n<li><code>rescue<\/code>\u7bc0\u3067\u4f8b\u5916\u30af\u30e9\u30b9\u3092\u6307\u5b9a\u3057\u306a\u3044\u5834\u5408\u306f<code>StandardError<\/code>\u304c\u6355\u6349\u3055\u308c\u308b<\/li>\n\n\n\n<li>\u30ab\u30b9\u30bf\u30e0\u4f8b\u5916\u306f\u901a\u5e38<code>StandardError<\/code>\u3092\u7d99\u627f\u3057\u3066\u4f5c\u6210\u3059\u308b<\/li>\n<\/ol>\n\n\n\n<p>\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u306e\u57fa\u672c\u3092\u62bc\u3055\u3048\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u4fe1\u983c\u6027\u306e\u9ad8\u3044\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u4f5c\u6210\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-10\">rescueblock\u51e6\u7406\u306e\u52b9\u679c\u7684\u306a\u5b9f\u88c5\u30d1\u30bf\u30fc\u30f3<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-11\">\u57fa\u672c\u7684\u306arescue\u69cb\u6587\u306e\u66f8\u304d\u65b9<\/h3>\n\n\n\n<p>rescue\u30d6\u30ed\u30c3\u30af\u306e\u57fa\u672c\u7684\u306a\u69cb\u6587\u306b\u306f\u3001\u30e1\u30bd\u30c3\u30c9\u5185\u3067\u306e\u76f4\u63a5\u7684\u306a\u4f7f\u7528\u3068begin-rescue-end\u30d6\u30ed\u30c3\u30af\u306e2\u3064\u306e\u30d1\u30bf\u30fc\u30f3\u304c\u3042\u308a\u307e\u3059\u3002\u305d\u308c\u305e\u308c\u306e\u7279\u5fb4\u3068\u4f7f\u3044\u5206\u3051\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\"># \u30d1\u30bf\u30fc\u30f31: \u30e1\u30bd\u30c3\u30c9\u5185\u3067\u306e\u76f4\u63a5\u7684\u306a\u4f7f\u7528\ndef process_data(data)\n  # \u5371\u967a\u306a\u51e6\u7406\n  process_dangerous_operation(data)\nrescue StandardError =&gt; e\n  # \u30a8\u30e9\u30fc\u51e6\u7406\n  log_error(e)\n  raise # \u30a8\u30e9\u30fc\u3092\u518d\u9001\u51fa\u3059\u308b\u5834\u5408\nend\n\n# \u30d1\u30bf\u30fc\u30f32: begin-rescue-end\u30d6\u30ed\u30c3\u30af\nbegin\n  # \u5371\u967a\u306a\u51e6\u7406\u3092\u30d6\u30ed\u30c3\u30af\u3067\u56f2\u3080\n  connection = DB.connect\n  data = connection.query(\"SELECT * FROM users\")\nrescue StandardError =&gt; e\n  # \u30a8\u30e9\u30fc\u51e6\u7406\n  log_error(e)\nensure\n  # \u30ea\u30bd\u30fc\u30b9\u306e\u30af\u30ea\u30fc\u30f3\u30a2\u30c3\u30d7\n  connection&amp;.close\nend<\/pre>\n\n\n\n<p>\u3069\u3061\u3089\u306e\u30d1\u30bf\u30fc\u30f3\u3092\u9078\u629e\u3059\u308b\u304b\u306f\u3001\u4ee5\u4e0b\u306e\u57fa\u6e96\u3067\u5224\u65ad\u3057\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30e1\u30bd\u30c3\u30c9\u5185\u3067\u306e\u76f4\u63a5\u7684\u306a\u4f7f\u7528<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30e1\u30bd\u30c3\u30c9\u5168\u4f53\u304c\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u306e\u5bfe\u8c61\u306e\u5834\u5408<\/li>\n\n\n\n<li>\u30b3\u30fc\u30c9\u304c\u30b7\u30f3\u30d7\u30eb\u3067\u898b\u901a\u3057\u304c\u826f\u3044\u5834\u5408<\/li>\n\n\n\n<li>\u5358\u4e00\u306e\u51e6\u7406\u306b\u5bfe\u3059\u308b\u30a8\u30e9\u30fc\u51e6\u7406\u306e\u5834\u5408<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li>begin-rescue-end\u30d6\u30ed\u30c3\u30af<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u7279\u5b9a\u306e\u30d6\u30ed\u30c3\u30af\u306e\u307f\u3092\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u3057\u305f\u3044\u5834\u5408<\/li>\n\n\n\n<li>\u8907\u6570\u306e\u51e6\u7406\u3092\u4e00\u3064\u306e\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u3067\u30ab\u30d0\u30fc\u3059\u308b\u5834\u5408<\/li>\n\n\n\n<li>ensure\u53e5\u3067\u30ea\u30bd\u30fc\u30b9\u306e\u89e3\u653e\u304c\u5fc5\u8981\u306a\u5834\u5408<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-12\">\u8907\u6570\u306e\u4f8b\u5916\u3092\u500b\u5225\u306b\u6271\u3046\u65b9\u6cd5<\/h3>\n\n\n\n<p>\u5b9f\u8df5\u7684\u306a\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u306f\u3001\u8907\u6570\u306e\u7a2e\u985e\u306e\u4f8b\u5916\u3092\u500b\u5225\u306b\u51e6\u7406\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u3053\u3068\u304c\u3088\u304f\u3042\u308a\u307e\u3059\u3002Ruby\u3067\u306f\u3001\u8907\u6570\u306e\u4f8b\u5916\u3092\u52b9\u7387\u7684\u306b\u51e6\u7406\u3059\u308b\u65b9\u6cd5\u304c\u7528\u610f\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">def complex_operation\n  begin\n    # \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u64cd\u4f5c\n    result = db_operation()\n\n    # API\u547c\u3073\u51fa\u3057\n    api_result = api_call()\n\n    # \u30d5\u30a1\u30a4\u30eb\u64cd\u4f5c\n    file_result = file_operation()\n\n  rescue ActiveRecord::RecordNotFound =&gt; e\n    # \u30ec\u30b3\u30fc\u30c9\u304c\u898b\u3064\u304b\u3089\u306a\u3044\u5834\u5408\u306e\u51e6\u7406\n    log_error(\"\u30c7\u30fc\u30bf\u304c\u898b\u3064\u304b\u308a\u307e\u305b\u3093: #{e.message}\")\n    raise CustomNotFoundError, \"\u8981\u6c42\u3055\u308c\u305f\u30ea\u30bd\u30fc\u30b9\u304c\u898b\u3064\u304b\u308a\u307e\u305b\u3093\"\n\n  rescue Net::HTTPError =&gt; e\n    # API\u901a\u4fe1\u30a8\u30e9\u30fc\u306e\u51e6\u7406\n    log_error(\"API\u901a\u4fe1\u30a8\u30e9\u30fc: #{e.message}\")\n    notify_admin(\"API\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u307e\u3057\u305f\")\n    retry if should_retry?\n\n  rescue Errno::ENOENT =&gt; e\n    # \u30d5\u30a1\u30a4\u30eb\u95a2\u9023\u30a8\u30e9\u30fc\u306e\u51e6\u7406\n    log_error(\"\u30d5\u30a1\u30a4\u30eb\u30a8\u30e9\u30fc: #{e.message}\")\n    create_empty_file\n    retry\n\n  rescue StandardError =&gt; e\n    # \u305d\u306e\u4ed6\u306e\u4e00\u822c\u7684\u306a\u30a8\u30e9\u30fc\u306e\u51e6\u7406\n    log_error(\"\u4e88\u671f\u305b\u306c\u30a8\u30e9\u30fc: #{e.message}\")\n    notify_admin(e)\n  end\nend<\/pre>\n\n\n\n<p>\u3053\u306e\u30d1\u30bf\u30fc\u30f3\u306e\u5229\u70b9\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u4f8b\u5916\u306e\u7a2e\u985e\u3054\u3068\u306b\u9069\u5207\u306a\u51e6\u7406\u304c\u53ef\u80fd<\/li>\n\n\n\n<li>\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u3088\u308a\u5177\u4f53\u7684\u306b\u8a2d\u5b9a\u53ef\u80fd<\/li>\n\n\n\n<li>\u4f8b\u5916\u306e\u7a2e\u985e\u306b\u5fdc\u3058\u3066\u7570\u306a\u308b\u30ea\u30ab\u30d0\u30ea\u30fc\u6226\u7565\u3092\u5b9f\u88c5\u53ef\u80fd<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-13\">else\u53e5\u3068ensure\u53e5\u306e\u9069\u5207\u306a\u4f7f\u7528\u65b9\u6cd5<\/h3>\n\n\n\n<p>else\u53e5\u3068ensure\u53e5\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u7d30\u304b\u3044\u5236\u5fa1\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u53e5\u306e\u9069\u5207\u306a\u4f7f\u7528\u65b9\u6cd5\u3092\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">def process_with_cleanup\n  file = File.open(\"important.txt\", \"w\")\n  begin\n    # \u5371\u967a\u306a\u51e6\u7406\n    process_data(file)\n  rescue IOError =&gt; e\n    # \u30d5\u30a1\u30a4\u30eb\u64cd\u4f5c\u30a8\u30e9\u30fc\u306e\u51e6\u7406\n    log_error(\"\u30d5\u30a1\u30a4\u30eb\u64cd\u4f5c\u30a8\u30e9\u30fc: #{e.message}\")\n    false  # \u51e6\u7406\u5931\u6557\u3092\u793a\u3059\u623b\u308a\u5024\n  else\n    # \u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u306a\u304b\u3063\u305f\u5834\u5408\u306e\u51e6\u7406\n    log_success(\"\u51e6\u7406\u304c\u6210\u529f\u3057\u307e\u3057\u305f\")\n    true   # \u51e6\u7406\u6210\u529f\u3092\u793a\u3059\u623b\u308a\u5024\n  ensure\n    # \u5fc5\u305a\u5b9f\u884c\u3055\u308c\u308b\u51e6\u7406\uff08\u30ea\u30bd\u30fc\u30b9\u306e\u30af\u30ea\u30fc\u30f3\u30a2\u30c3\u30d7\uff09\n    file.close if file\n  end\nend\n\n# \u3088\u308a\u5b9f\u8df5\u7684\u306a\u4f8b\uff1a\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u51e6\u7406\ndef transaction_with_retry\n  retry_count = 0\n  begin\n    ActiveRecord::Base.transaction do\n      # \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u51e6\u7406\n      user.save!\n      order.update!(status: 'completed')\n    end\n  rescue ActiveRecord::RecordInvalid =&gt; e\n    # \u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u30a8\u30e9\u30fc\u306e\u51e6\u7406\n    log_validation_error(e)\n    raise\n  rescue ActiveRecord::StaleObjectError =&gt; e\n    # \u697d\u89b3\u7684\u30ed\u30c3\u30af\u30a8\u30e9\u30fc\u306e\u51e6\u7406\n    retry_count += 1\n    if retry_count &lt; 3\n      sleep(0.1 * retry_count)\n      retry\n    else\n      raise\n    end\n  else\n    # \u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u6210\u529f\u6642\u306e\u51e6\u7406\n    notify_success\n  ensure\n    # \u30af\u30ea\u30fc\u30f3\u30a2\u30c3\u30d7\u51e6\u7406\n    cleanup_temporary_data\n  end\nend<\/pre>\n\n\n\n<p>else\u53e5\u3068ensure\u53e5\u306e\u4f7f\u7528\u6307\u91dd\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>else\u53e5\u306e\u4f7f\u7528\u5834\u5408\uff1a<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u306a\u304b\u3063\u305f\u5834\u5408\u306e\u7279\u5225\u306a\u51e6\u7406\u304c\u5fc5\u8981\u306a\u6642<\/li>\n\n\n\n<li>\u6b63\u5e38\u7cfb\u3068\u7570\u5e38\u7cfb\u306e\u51e6\u7406\u3092\u660e\u78ba\u306b\u5206\u3051\u305f\u3044\u6642<\/li>\n\n\n\n<li>\u51e6\u7406\u306e\u6210\u529f\u3092\u660e\u793a\u7684\u306b\u8a18\u9332\u3057\u305f\u3044\u6642<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li>ensure\u53e5\u306e\u4f7f\u7528\u5834\u5408\uff1a<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30d5\u30a1\u30a4\u30eb\u3084\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u63a5\u7d9a\u306e\u30af\u30ed\u30fc\u30ba<\/li>\n\n\n\n<li>\u4e00\u6642\u30d5\u30a1\u30a4\u30eb\u306e\u524a\u9664<\/li>\n\n\n\n<li>\u30ed\u30c3\u30af\u306e\u89e3\u653e<\/li>\n\n\n\n<li>\u30ed\u30b0\u51fa\u529b\u306e\u5b8c\u4e86\u51e6\u7406<\/li>\n<\/ul>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u30d1\u30bf\u30fc\u30f3\u3092\u9069\u5207\u306b\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u5805\u7262\u306a\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u3092\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-14\">7\u3064\u306e\u5b9f\u8df5\u7684\u306a\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u30c6\u30af\u30cb\u30c3\u30af<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-15\">\u30c6\u30af\u30cb\u30c3\u30af1\uff1a\u4f8b\u5916\u30af\u30e9\u30b9\u306e\u7d99\u627f\u3092\u6d3b\u7528\u3057\u305f\u51e6\u7406<\/h3>\n\n\n\n<p>\u4f8b\u5916\u30af\u30e9\u30b9\u3092\u7d99\u627f\u3057\u3066\u72ec\u81ea\u306e\u4f8b\u5916\u30af\u30e9\u30b9\u3092\u4f5c\u6210\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u7d30\u304b\u3044\u30a8\u30e9\u30fc\u5236\u5fa1\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\"># \u57fa\u5e95\u3068\u306a\u308b\u72ec\u81ea\u4f8b\u5916\u30af\u30e9\u30b9\nclass ApplicationError &lt; StandardError\n  attr_reader :code, :details\n\n  def initialize(message = \"An error occurred\", code = nil, details = {})\n    @code = code\n    @details = details\n    super(message)\n  end\nend\n\n# \u5177\u4f53\u7684\u306a\u4f8b\u5916\u30af\u30e9\u30b9\nclass ValidationError &lt; ApplicationError\n  def initialize(message = \"Validation failed\", details = {})\n    super(message, \"VALIDATION_ERROR\", details)\n  end\nend\n\nclass APIError &lt; ApplicationError\n  def initialize(message = \"API request failed\", details = {})\n    super(message, \"API_ERROR\", details)\n  end\nend\n\n# \u5b9f\u8df5\u7684\u306a\u4f7f\u7528\u4f8b\ndef process_user_data(user_params)\n  begin\n    validate_user(user_params)\n    api_result = call_external_api(user_params)\n    save_user_data(api_result)\n  rescue ValidationError =&gt; e\n    log_error(\"\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u30a8\u30e9\u30fc\", e.code, e.details)\n    raise\n  rescue APIError =&gt; e\n    log_error(\"API\u547c\u3073\u51fa\u3057\u30a8\u30e9\u30fc\", e.code, e.details)\n    notify_admin(e)\n    false\n  end\nend<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-16\">\u30c6\u30af\u30cb\u30c3\u30af2\uff1aretry\u6a5f\u80fd\u3092\u4f7f\u7528\u3057\u305f\u81ea\u52d5\u30ea\u30ab\u30d0\u30ea\u30fc<\/h3>\n\n\n\n<p>\u4e00\u6642\u7684\u306a\u969c\u5bb3\u306b\u5bfe\u3057\u3066\u3001retry\u3092\u4f7f\u7528\u3057\u3066\u81ea\u52d5\u7684\u306b\u30ea\u30ab\u30d0\u30ea\u30fc\u3092\u8a66\u307f\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class APIClient\n  MAX_RETRIES = 3\n  RETRY_WAIT = 1.0\n\n  def self.fetch_data(endpoint)\n    retries = 0\n    begin\n      response = HTTP.timeout(5).get(endpoint)\n      handle_response(response)\n    rescue HTTP::TimeoutError, HTTP::ConnectionError =&gt; e\n      retries += 1\n      if retries &lt;= MAX_RETRIES\n        wait_time = RETRY_WAIT * (2 ** (retries - 1)) # \u6307\u6570\u30d0\u30c3\u30af\u30aa\u30d5\n        logger.warn(\"API\u547c\u3073\u51fa\u3057\u306b\u5931\u6557\u3057\u307e\u3057\u305f\u3002#{wait_time}\u79d2\u5f8c\u306b\u30ea\u30c8\u30e9\u30a4\u3057\u307e\u3059\u3002(#{retries}\/#{MAX_RETRIES})\")\n        sleep(wait_time)\n        retry\n      else\n        logger.error(\"API\u30ea\u30c8\u30e9\u30a4\u4e0a\u9650\u306b\u9054\u3057\u307e\u3057\u305f: #{e.message}\")\n        raise APIError.new(\"API\u547c\u3073\u51fa\u3057\u304c#{MAX_RETRIES}\u56de\u5931\u6557\u3057\u307e\u3057\u305f\", details: { endpoint: endpoint })\n      end\n    end\n  end\n\n  private\n\n  def self.handle_response(response)\n    case response.code\n    when 200..299\n      JSON.parse(response.body.to_s)\n    when 404\n      raise NotFoundError.new(\"\u30ea\u30bd\u30fc\u30b9\u304c\u898b\u3064\u304b\u308a\u307e\u305b\u3093\")\n    when 500..599\n      raise ServerError.new(\"\u30b5\u30fc\u30d0\u30fc\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u307e\u3057\u305f\")\n    else\n      raise APIError.new(\"\u4e88\u671f\u305b\u306c\u30ec\u30b9\u30dd\u30f3\u30b9\u30b3\u30fc\u30c9: #{response.code}\")\n    end\n  end\nend<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-17\">\u30c6\u30af\u30cb\u30c3\u30af3\uff1abegin-rescue\u306e\u30b9\u30b3\u30fc\u30d7\u6700\u9069\u5316<\/h3>\n\n\n\n<p>\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u306e\u30b9\u30b3\u30fc\u30d7\u3092\u6700\u9069\u5316\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u6b63\u78ba\u306a\u30a8\u30e9\u30fc\u51e6\u7406\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class DocumentProcessor\n  def process_document(document_path)\n    # \u30d5\u30a1\u30a4\u30eb\u306e\u5b58\u5728\u30c1\u30a7\u30c3\u30af\u306f\u500b\u5225\u306b\u884c\u3046\n    unless File.exist?(document_path)\n      raise ArgumentError, \"\u30d5\u30a1\u30a4\u30eb\u304c\u5b58\u5728\u3057\u307e\u305b\u3093: #{document_path}\"\n    end\n\n    begin\n      # \u30d5\u30a1\u30a4\u30eb\u8aad\u307f\u8fbc\u307f\u51e6\u7406\u306e\u307f\u3092rescue\u3067\u56f2\u3080\n      content = File.read(document_path)\n    rescue SystemCallError =&gt; e\n      logger.error(\"\u30d5\u30a1\u30a4\u30eb\u8aad\u307f\u8fbc\u307f\u30a8\u30e9\u30fc: #{e.message}\")\n      raise IOError, \"\u30d5\u30a1\u30a4\u30eb\u3092\u8aad\u307f\u8fbc\u3081\u307e\u305b\u3093: #{e.message}\"\n    end\n\n    begin\n      # \u30d1\u30fc\u30b9\u51e6\u7406\u306f\u5225\u306erescue\u30d6\u30ed\u30c3\u30af\u3067\u51e6\u7406\n      parsed_data = JSON.parse(content)\n    rescue JSON::ParserError =&gt; e\n      logger.error(\"JSON\u30d1\u30fc\u30b9\u30a8\u30e9\u30fc: #{e.message}\")\n      raise ValidationError, \"\u4e0d\u6b63\u306aJSON\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\"\n    end\n\n    # \u51e6\u7406\u7d50\u679c\u3092\u8fd4\u3059\n    processed_result = process_data(parsed_data)\n    { status: :success, data: processed_result }\n  end\nend<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-18\">\u30c6\u30af\u30cb\u30c3\u30af4\uff1a\u4f8b\u5916\u60c5\u5831\u306e\u52b9\u679c\u7684\u306a\u30ed\u30b0\u8a18\u9332<\/h3>\n\n\n\n<p>\u30c7\u30d0\u30c3\u30b0\u3084\u969c\u5bb3\u5206\u6790\u306b\u5f79\u7acb\u3064\u60c5\u5831\u3092\u9069\u5207\u306b\u30ed\u30b0\u306b\u8a18\u9332\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">module ErrorLogger\n  class &lt;&lt; self\n    def log_error(error, context = {})\n      error_info = {\n        error_class: error.class.name,\n        message: error.message,\n        backtrace: error.backtrace&amp;.first(5),\n        timestamp: Time.current,\n        environment: Rails.env,\n        context: context\n      }\n\n      # \u30a8\u30e9\u30fc\u60c5\u5831\u306e\u69cb\u9020\u5316\n      case error\n      when ActiveRecord::RecordInvalid\n        log_validation_error(error, error_info)\n      when ActionController::ParameterMissing\n        log_parameter_error(error, error_info)\n      else\n        log_general_error(error, error_info)\n      end\n    end\n\n    private\n\n    def log_validation_error(error, info)\n      info[:validation_errors] = error.record.errors.messages\n      Rails.logger.warn(info.to_json)\n    end\n\n    def log_parameter_error(error, info)\n      info[:parameters] = error.param\n      Rails.logger.warn(info.to_json)\n    end\n\n    def log_general_error(error, info)\n      Rails.logger.error(info.to_json)\n    end\n  end\nend<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-19\">\u30c6\u30af\u30cb\u30c3\u30af5\uff1a\u30ab\u30b9\u30bf\u30e0\u4f8b\u5916\u30af\u30e9\u30b9\u306e\u8a2d\u8a08\u3068\u6d3b\u7528<\/h3>\n\n\n\n<p>\u30c9\u30e1\u30a4\u30f3\u56fa\u6709\u306e\u4f8b\u5916\u3092\u5b9a\u7fa9\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u660e\u78ba\u306a\u30a8\u30e9\u30fc\u51e6\u7406\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">module PaymentSystem\n  # \u652f\u6255\u3044\u95a2\u9023\u306e\u57fa\u5e95\u4f8b\u5916\u30af\u30e9\u30b9\n  class PaymentError &lt; StandardError\n    attr_reader :payment_id, :error_code\n\n    def initialize(message, payment_id: nil, error_code: nil)\n      @payment_id = payment_id\n      @error_code = error_code\n      super(message)\n    end\n  end\n\n  # \u5177\u4f53\u7684\u306a\u4f8b\u5916\u30af\u30e9\u30b9\n  class InsufficientFundsError &lt; PaymentError\n    def initialize(payment_id:, amount:, balance:)\n      super(\n        \"\u6b8b\u9ad8\u4e0d\u8db3\u3067\u3059\uff08\u5fc5\u8981\u984d: #{amount}\u5186\u3001\u6b8b\u9ad8: #{balance}\u5186\uff09\",\n        payment_id: payment_id,\n        error_code: 'INSUFFICIENT_FUNDS'\n      )\n    end\n  end\n\n  class PaymentProcessingError &lt; PaymentError\n    def initialize(payment_id:, provider_message:)\n      super(\n        \"\u6c7a\u6e08\u51e6\u7406\u306b\u5931\u6557\u3057\u307e\u3057\u305f: #{provider_message}\",\n        payment_id: payment_id,\n        error_code: 'PROCESSING_ERROR'\n      )\n    end\n  end\n\n  # \u5b9f\u88c5\u4f8b\n  class PaymentProcessor\n    def process_payment(payment)\n      validate_payment(payment)\n      process_with_provider(payment)\n    rescue PaymentError =&gt; e\n      handle_payment_error(e)\n    end\n\n    private\n\n    def validate_payment(payment)\n      if payment.amount &gt; payment.user.balance\n        raise InsufficientFundsError.new(\n          payment_id: payment.id,\n          amount: payment.amount,\n          balance: payment.user.balance\n        )\n      end\n    end\n  end\nend<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-20\">\u30c6\u30af\u30cb\u30c3\u30af6\uff1arescue\u4fee\u98fe\u5b50\u3092\u4f7f\u3063\u305f\u30b7\u30f3\u30d7\u30eb\u306a\u5b9f\u88c5<\/h3>\n\n\n\n<p>\u5358\u7d14\u306a\u30a8\u30e9\u30fc\u51e6\u7406\u306e\u5834\u5408\u3001rescue\u4fee\u98fe\u5b50\u3092\u4f7f\u7528\u3057\u3066\u30b3\u30fc\u30c9\u3092\u30b7\u30f3\u30d7\u30eb\u306b\u4fdd\u3064\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class CacheManager\n  def fetch_cached_data(key)\n    # \u30ad\u30e3\u30c3\u30b7\u30e5\u304b\u3089\u5024\u3092\u53d6\u5f97\u3001\u5931\u6557\u6642\u306fnil\u3092\u8fd4\u3059\n    Rails.cache.read(key) rescue nil\n  end\n\n  def safe_parse_json(string)\n    # JSON\u89e3\u6790\u3001\u5931\u6557\u6642\u306f\u7a7a\u306e\u30cf\u30c3\u30b7\u30e5\u3092\u8fd4\u3059\n    JSON.parse(string) rescue {}\n  end\n\n  def fetch_user_preference(user_id)\n    # \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u304b\u3089\u8a2d\u5b9a\u3092\u53d6\u5f97\u3001\u5931\u6557\u6642\u306f\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u3092\u8fd4\u3059\n    UserPreference.find_by(user_id: user_id)&amp;.settings rescue DEFAULT_SETTINGS\n  end\nend<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-21\">\u30c6\u30af\u30cb\u30c3\u30af7\uff1araise\/rescue\u306b\u3088\u308b\u4f8b\u5916\u306e\u518d\u9001\u4fe1<\/h3>\n\n\n\n<p>\u30a8\u30e9\u30fc\u60c5\u5831\u3092\u4fdd\u6301\u3057\u306a\u304c\u3089\u3001\u3088\u308a\u9069\u5207\u306a\u4f8b\u5916\u306b\u5909\u63db\u3057\u3066\u518d\u9001\u4fe1\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class APIGateway\n  class &lt;&lt; self\n    def fetch_user_data(user_id)\n      response = make_api_request(\"\/users\/#{user_id}\")\n      process_response(response)\n    rescue RestClient::NotFound =&gt; e\n      # 404\u30a8\u30e9\u30fc\u3092\u9069\u5207\u306a\u72ec\u81ea\u4f8b\u5916\u306b\u5909\u63db\n      raise UserNotFoundError.new(\n        \"\u30e6\u30fc\u30b6\u30fc\u304c\u898b\u3064\u304b\u308a\u307e\u305b\u3093: #{user_id}\",\n        original_error: e\n      )\n    rescue RestClient::Unauthorized =&gt; e\n      # \u8a8d\u8a3c\u30a8\u30e9\u30fc\u3092\u8a18\u9332\u3057\u3066\u518d\u9001\u4fe1\n      logger.error(\"API\u8a8d\u8a3c\u30a8\u30e9\u30fc: #{e.message}\")\n      raise AuthenticationError.new(\n        \"API\u8a8d\u8a3c\u306b\u5931\u6557\u3057\u307e\u3057\u305f\",\n        original_error: e\n      )\n    rescue RestClient::Exception =&gt; e\n      # \u305d\u306e\u4ed6\u306eAPI\u30a8\u30e9\u30fc\u3092\u6c4e\u7528\u30a8\u30e9\u30fc\u3068\u3057\u3066\u6271\u3046\n      handle_api_error(e)\n    end\n\n    private\n\n    def handle_api_error(error)\n      logger.error(\"API\u30a8\u30e9\u30fc: #{error.message}\")\n      logger.error(\"\u30ec\u30b9\u30dd\u30f3\u30b9: #{error.response}\")\n\n      raise APIError.new(\n        \"API\u30ea\u30af\u30a8\u30b9\u30c8\u306b\u5931\u6557\u3057\u307e\u3057\u305f\",\n        status: error.response.code,\n        body: error.response.body,\n        original_error: error\n      )\n    end\n  end\nend\n\n# \u30ab\u30b9\u30bf\u30e0\u30a8\u30e9\u30fc\u30af\u30e9\u30b9\nclass APIError &lt; StandardError\n  attr_reader :status, :body, :original_error\n\n  def initialize(message, status: nil, body: nil, original_error: nil)\n    @status = status\n    @body = body\n    @original_error = original_error\n    super(message)\n  end\nend<\/pre>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u30c6\u30af\u30cb\u30c3\u30af\u3092\u72b6\u6cc1\u306b\u5fdc\u3058\u3066\u9069\u5207\u306b\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u5805\u7262\u306a\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u3092\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-22\">\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-23\">\u7121\u99c4\u306a\u4f8b\u5916\u51e6\u7406\u3092\u907f\u3051\u308b\u305f\u3081\u306e\u8a2d\u8a08\u6307\u91dd<\/h3>\n\n\n\n<p>\u52b9\u7387\u7684\u306a\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u3092\u5b9f\u73fe\u3059\u308b\u306b\u306f\u3001\u9069\u5207\u306a\u8a2d\u8a08\u6307\u91dd\u306b\u5f93\u3046\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002\u4ee5\u4e0b\u306b\u3001Ruby\u3067\u306e\u4f8b\u5916\u51e6\u7406\u306b\u304a\u3051\u308b\u91cd\u8981\u306a\u8a2d\u8a08\u539f\u5247\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-24\">1. \u4f8b\u5916\u306e\u9069\u5207\u306a\u7c92\u5ea6\u8a2d\u5b9a<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\"># \u60aa\u3044\u4f8b\uff1a\u5927\u304d\u3059\u304e\u308b\u7c92\u5ea6\ndef process_order(order)\n  begin\n    # \u5168\u3066\u306e\u51e6\u7406\u30921\u3064\u306ebegin-rescue\u53e5\u3067\u56f2\u3080\n    validate_order(order)\n    process_payment(order)\n    update_inventory(order)\n    send_confirmation(order)\n  rescue StandardError =&gt; e\n    # \u30a8\u30e9\u30fc\u306e\u7a2e\u985e\u304c\u7279\u5b9a\u3067\u304d\u306a\u3044\n    logger.error(e)\n    raise\n  end\nend\n\n# \u826f\u3044\u4f8b\uff1a\u9069\u5207\u306a\u7c92\u5ea6\u3067\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\nclass OrderProcessor\n  def process_order(order)\n    validate_order(order)\n    process_payment(order)\n    update_inventory(order)\n    send_confirmation(order)\n  rescue ValidationError =&gt; e\n    handle_validation_error(e, order)\n  rescue PaymentError =&gt; e\n    handle_payment_error(e, order)\n  rescue InventoryError =&gt; e\n    handle_inventory_error(e, order)\n  rescue NotificationError =&gt; e\n    handle_notification_error(e, order)\n  end\n\n  private\n\n  def handle_validation_error(error, order)\n    logger.error(\"\u6ce8\u6587\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u30a8\u30e9\u30fc: #{error.message}\", order_id: order.id)\n    raise OrderError.new(\"\u6ce8\u6587\u306e\u691c\u8a3c\u306b\u5931\u6557\u3057\u307e\u3057\u305f\", cause: error)\n  end\n\n  # \u4ed6\u306e\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30e9\u30fc\u30e1\u30bd\u30c3\u30c9...\nend<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-25\">2. \u4f8b\u5916\u306e\u9069\u5207\u306a\u968e\u5c64\u69cb\u9020<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\"># \u4f8b\u5916\u30af\u30e9\u30b9\u306e\u968e\u5c64\u69cb\u9020\u306e\u4f8b\nmodule ECommerce\n  # \u57fa\u5e95\u4f8b\u5916\u30af\u30e9\u30b9\n  class Error &lt; StandardError; end\n\n  # \u6a5f\u80fd\u5225\u306e\u57fa\u5e95\u4f8b\u5916\u30af\u30e9\u30b9\n  class OrderError &lt; Error; end\n  class PaymentError &lt; Error; end\n  class InventoryError &lt; Error; end\n\n  # \u3088\u308a\u5177\u4f53\u7684\u306a\u4f8b\u5916\u30af\u30e9\u30b9\n  module Order\n    class ValidationError &lt; OrderError; end\n    class ProcessingError &lt; OrderError; end\n  end\n\n  module Payment\n    class InsufficientFundsError &lt; PaymentError; end\n    class CardDeclinedError &lt; PaymentError; end\n  end\nend\n\n# \u4f7f\u7528\u4f8b\ndef process_payment\n  validate_payment_info\nrescue ECommerce::Payment::InsufficientFundsError =&gt; e\n  notify_user_insufficient_funds(e)\nrescue ECommerce::Payment::CardDeclinedError =&gt; e\n  request_alternative_payment_method(e)\nend<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-26\">\u30c6\u30b9\u30c8\u306e\u53ef\u80fd\u6027\u3092\u8003\u616e\u3057\u305frescue\u306e\u5b9f\u88c5\u65b9\u6cd5<\/h3>\n\n\n\n<p>\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u306e\u30c6\u30b9\u30c8\u5bb9\u6613\u6027\u3092\u78ba\u4fdd\u3059\u308b\u305f\u3081\u306e\u5b9f\u88c5\u30d1\u30bf\u30fc\u30f3\u3068\u30c6\u30b9\u30c8\u65b9\u6cd5\u3092\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-27\">1. \u30c6\u30b9\u30c8\u53ef\u80fd\u306a\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u8a2d\u8a08<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\"># \u30c6\u30b9\u30c8\u5bb9\u6613\u6027\u3092\u8003\u616e\u3057\u305f\u30b5\u30fc\u30d3\u30b9\u30af\u30e9\u30b9\nclass PaymentService\n  class &lt;&lt; self\n    def process_payment(payment_params)\n      new.process_payment(payment_params)\n    end\n  end\n\n  def process_payment(payment_params)\n    validate_params(payment_params)\n    charge = create_charge(payment_params)\n    record_transaction(charge)\n    notify_user(charge)\n\n    { success: true, charge_id: charge.id }\n  rescue ValidationError =&gt; e\n    handle_validation_error(e)\n  rescue PaymentProcessingError =&gt; e\n    handle_processing_error(e)\n  end\n\n  private\n\n  def validate_params(params)\n    validator = PaymentParamsValidator.new(params)\n    raise ValidationError, validator.errors unless validator.valid?\n  end\n\n  def create_charge(params)\n    payment_gateway.create_charge(params)\n  rescue PaymentGateway::Error =&gt; e\n    raise PaymentProcessingError, e.message\n  end\n\n  def handle_validation_error(error)\n    log_error(error)\n    { success: false, error: error.message, type: :validation_error }\n  end\n\n  def handle_processing_error(error)\n    log_error(error)\n    notify_admin(error)\n    { success: false, error: error.message, type: :processing_error }\n  end\n\n  def payment_gateway\n    @payment_gateway ||= PaymentGateway.new\n  end\nend<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-28\">2. \u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u306e\u30c6\u30b9\u30c8\u30b1\u30fc\u30b9<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">RSpec.describe PaymentService do\n  let(:service) { described_class.new }\n  let(:valid_params) do\n    {\n      amount: 1000,\n      currency: 'JPY',\n      card_token: 'tok_valid'\n    }\n  end\n\n  describe '#process_payment' do\n    context '\u6b63\u5e38\u7cfb' do\n      it '\u652f\u6255\u3044\u51e6\u7406\u304c\u6210\u529f\u3059\u308b' do\n        result = service.process_payment(valid_params)\n\n        expect(result[:success]).to be true\n        expect(result[:charge_id]).to be_present\n      end\n    end\n\n    context '\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u30a8\u30e9\u30fc\u306e\u5834\u5408' do\n      let(:invalid_params) { valid_params.merge(amount: -1) }\n\n      it '\u9069\u5207\u306a\u30a8\u30e9\u30fc\u30ec\u30b9\u30dd\u30f3\u30b9\u3092\u8fd4\u3059' do\n        result = service.process_payment(invalid_params)\n\n        expect(result[:success]).to be false\n        expect(result[:type]).to eq(:validation_error)\n        expect(result[:error]).to include('\u91d1\u984d\u304c\u4e0d\u6b63\u3067\u3059')\n      end\n    end\n\n    context '\u6c7a\u6e08\u51e6\u7406\u30a8\u30e9\u30fc\u306e\u5834\u5408' do\n      before do\n        allow(service.send(:payment_gateway))\n          .to receive(:create_charge)\n          .and_raise(PaymentGateway::Error.new('\u30ab\u30fc\u30c9\u6c7a\u6e08\u306b\u5931\u6557\u3057\u307e\u3057\u305f'))\n      end\n\n      it '\u9069\u5207\u306a\u30a8\u30e9\u30fc\u30ec\u30b9\u30dd\u30f3\u30b9\u3092\u8fd4\u3059' do\n        result = service.process_payment(valid_params)\n\n        expect(result[:success]).to be false\n        expect(result[:type]).to eq(:processing_error)\n        expect(result[:error]).to include('\u30ab\u30fc\u30c9\u6c7a\u6e08\u306b\u5931\u6557\u3057\u307e\u3057\u305f')\n      end\n\n      it '\u7ba1\u7406\u8005\u306b\u901a\u77e5\u3059\u308b' do\n        expect(service)\n          .to receive(:notify_admin)\n          .with(instance_of(PaymentProcessingError))\n\n        service.process_payment(valid_params)\n      end\n    end\n  end\nend<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-29\">3. \u30e2\u30c3\u30af\/\u30b9\u30bf\u30d6\u3092\u6d3b\u7528\u3057\u305f\u30c6\u30b9\u30c8<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">RSpec.describe OrderProcessor do\n  let(:processor) { described_class.new }\n  let(:order) { build(:order) }\n\n  # \u5916\u90e8\u30b5\u30fc\u30d3\u30b9\u306e\u30e2\u30c3\u30af\n  let(:payment_service) { instance_double('PaymentService') }\n  let(:inventory_service) { instance_double('InventoryService') }\n  let(:notification_service) { instance_double('NotificationService') }\n\n  before do\n    allow(processor).to receive(:payment_service).and_return(payment_service)\n    allow(processor).to receive(:inventory_service).and_return(inventory_service)\n    allow(processor).to receive(:notification_service).and_return(notification_service)\n  end\n\n  describe '#process_order' do\n    context '\u652f\u6255\u3044\u51e6\u7406\u3067\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u305f\u5834\u5408' do\n      before do\n        allow(payment_service)\n          .to receive(:process)\n          .and_raise(PaymentError.new('\u652f\u6255\u3044\u51e6\u7406\u306b\u5931\u6557\u3057\u307e\u3057\u305f'))\n      end\n\n      it '\u30a8\u30e9\u30fc\u3092\u9069\u5207\u306b\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u3059\u308b' do\n        expect { processor.process_order(order) }\n          .to change { order.status }\n          .to('payment_failed')\n      end\n\n      it '\u30ed\u30b0\u3092\u8a18\u9332\u3059\u308b' do\n        expect(Rails.logger)\n          .to receive(:error)\n          .with(\/\u652f\u6255\u3044\u51e6\u7406\u306b\u5931\u6557\u3057\u307e\u3057\u305f\/)\n\n        processor.process_order(order)\n      end\n    end\n  end\nend<\/pre>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3068\u5b9f\u88c5\u30d1\u30bf\u30fc\u30f3\u3092\u6d3b\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u4fdd\u5b88\u6027\u304c\u9ad8\u304f\u3001\u30c6\u30b9\u30c8\u304c\u5bb9\u6613\u306a\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u3092\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-30\">\u5b9f\u969b\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u3088\u304f\u3042\u308b\u30a8\u30e9\u30fc\u3068\u305d\u306e\u5bfe\u51e6\u6cd5<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-31\">\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u64cd\u4f5c\u6642\u306e\u4f8b\u5916\u51e6\u7406\u30d1\u30bf\u30fc\u30f3<\/h3>\n\n\n\n<p>\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u64cd\u4f5c\u3067\u306f\u3001\u69d8\u3005\u306a\u4f8b\u5916\u304c\u767a\u751f\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u4ee5\u4e0b\u306b\u4e3b\u8981\u306a\u30a8\u30e9\u30fc\u30d1\u30bf\u30fc\u30f3\u3068\u5bfe\u51e6\u6cd5\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class DatabaseOperationService\n  class &lt;&lt; self\n    def safe_transaction\n      ActiveRecord::Base.transaction do\n        yield\n      rescue ActiveRecord::RecordNotFound =&gt; e\n        handle_not_found_error(e)\n      rescue ActiveRecord::RecordInvalid =&gt; e\n        handle_validation_error(e)\n      rescue ActiveRecord::StaleObjectError =&gt; e\n        handle_optimistic_lock_error(e)\n      rescue ActiveRecord::StatementInvalid =&gt; e\n        handle_sql_error(e)\n      rescue ActiveRecord::ConnectionTimeoutError =&gt; e\n        handle_connection_timeout(e)\n      end\n    end\n\n    private\n\n    def handle_not_found_error(error)\n      Rails.logger.error(\"\u30c7\u30fc\u30bf\u304c\u898b\u3064\u304b\u308a\u307e\u305b\u3093: #{error.message}\")\n      raise EntityNotFoundError.new(\"\u8981\u6c42\u3055\u308c\u305f\u30ea\u30bd\u30fc\u30b9\u304c\u898b\u3064\u304b\u308a\u307e\u305b\u3093\", original_error: error)\n    end\n\n    def handle_validation_error(error)\n      Rails.logger.error(\"\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u30a8\u30e9\u30fc: #{error.record.errors.full_messages}\")\n      raise ValidationError.new(\"\u30c7\u30fc\u30bf\u306e\u691c\u8a3c\u306b\u5931\u6557\u3057\u307e\u3057\u305f\", details: error.record.errors)\n    end\n\n    def handle_optimistic_lock_error(error)\n      Rails.logger.error(\"\u697d\u89b3\u7684\u30ed\u30c3\u30af\u30a8\u30e9\u30fc: #{error.message}\")\n      raise ConcurrencyError.new(\"\u30c7\u30fc\u30bf\u304c\u4ed6\u306e\u30e6\u30fc\u30b6\u30fc\u306b\u3088\u3063\u3066\u66f4\u65b0\u3055\u308c\u3066\u3044\u307e\u3059\")\n    end\n\n    def handle_sql_error(error)\n      Rails.logger.error(\"SQL\u30a8\u30e9\u30fc: #{error.message}\")\n      if error.message.include?('duplicate key value')\n        raise DuplicateRecordError.new(\"\u65e2\u306b\u540c\u3058\u30c7\u30fc\u30bf\u304c\u5b58\u5728\u3057\u307e\u3059\")\n      else\n        raise DatabaseError.new(\"\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u64cd\u4f5c\u306b\u5931\u6557\u3057\u307e\u3057\u305f\")\n      end\n    end\n\n    def handle_connection_timeout(error)\n      Rails.logger.error(\"DB\u63a5\u7d9a\u30bf\u30a4\u30e0\u30a2\u30a6\u30c8: #{error.message}\")\n      raise DatabaseConnectionError.new(\"\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3068\u306e\u63a5\u7d9a\u304c\u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\u3057\u307e\u3057\u305f\")\n    end\n  end\nend\n\n# \u4f7f\u7528\u4f8b\nclass OrderProcessor\n  def process_bulk_orders(orders)\n    DatabaseOperationService.safe_transaction do\n      orders.each do |order|\n        order.with_lock do\n          process_single_order(order)\n        end\n      rescue OrderError =&gt; e\n        handle_order_error(order, e)\n      end\n    end\n  end\n\n  private\n\n  def process_single_order(order)\n    update_inventory(order)\n    update_order_status(order)\n    create_shipment(order)\n  end\n\n  def handle_order_error(order, error)\n    order.update_columns(\n      status: :processing_failed,\n      error_message: error.message\n    )\n    notify_admin_of_failure(order, error)\n  end\nend<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-32\">\u5916\u90e8API\u3068\u9023\u643a\u6642\u306e\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0<\/h3>\n\n\n\n<p>\u5916\u90e8API\u3068\u306e\u9023\u643a\u3067\u306f\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30a8\u30e9\u30fc\u3084\u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\u306a\u3069\u3001\u69d8\u3005\u306a\u4f8b\u5916\u304c\u767a\u751f\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class APIClient\n  class &lt;&lt; self\n    def with_retry(max_retries: 3, base_wait_time: 1)\n      retries = 0\n      begin\n        yield\n      rescue Net::OpenTimeout, Net::ReadTimeout =&gt; e\n        handle_timeout_error(e, retries, max_retries, base_wait_time)\n      rescue Faraday::ConnectionFailed =&gt; e\n        handle_connection_error(e, retries, max_retries, base_wait_time)\n      rescue Faraday::ClientError =&gt; e\n        handle_client_error(e)\n      rescue Faraday::ServerError =&gt; e\n        handle_server_error(e)\n      end\n    end\n\n    private\n\n    def handle_timeout_error(error, retries, max_retries, base_wait_time)\n      if retries &lt; max_retries\n        wait_time = calculate_backoff(base_wait_time, retries)\n        log_retry_attempt(error, retries, wait_time)\n        sleep(wait_time)\n        retries += 1\n        retry\n      else\n        raise APITimeoutError.new(\"API\u30ea\u30af\u30a8\u30b9\u30c8\u304c\u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\u3057\u307e\u3057\u305f\", original_error: error)\n      end\n    end\n\n    def handle_connection_error(error, retries, max_retries, base_wait_time)\n      if retries &lt; max_retries\n        wait_time = calculate_backoff(base_wait_time, retries)\n        log_retry_attempt(error, retries, wait_time)\n        sleep(wait_time)\n        retries += 1\n        retry\n      else\n        raise APIConnectionError.new(\"API\u63a5\u7d9a\u306b\u5931\u6557\u3057\u307e\u3057\u305f\", original_error: error)\n      end\n    end\n\n    def handle_client_error(error)\n      case error.response[:status]\n      when 401\n        raise APIAuthenticationError.new(\"API\u8a8d\u8a3c\u306b\u5931\u6557\u3057\u307e\u3057\u305f\")\n      when 403\n        raise APIAuthorizationError.new(\"API\u30a2\u30af\u30bb\u30b9\u304c\u62d2\u5426\u3055\u308c\u307e\u3057\u305f\")\n      when 404\n        raise APIResourceNotFoundError.new(\"API\u30ea\u30bd\u30fc\u30b9\u304c\u898b\u3064\u304b\u308a\u307e\u305b\u3093\")\n      else\n        raise APIClientError.new(\"API\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u307e\u3057\u305f\", status: error.response[:status])\n      end\n    end\n\n    def handle_server_error(error)\n      raise APIServerError.new(\"API\u30b5\u30fc\u30d0\u30fc\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u307e\u3057\u305f\", status: error.response[:status])\n    end\n\n    def calculate_backoff(base_time, retry_count)\n      base_time * (2 ** retry_count) + rand(0.1..0.5)\n    end\n\n    def log_retry_attempt(error, retries, wait_time)\n      Rails.logger.warn(\"API\u30ea\u30c8\u30e9\u30a4\u5b9f\u884c (#{retries + 1}\u56de\u76ee): #{error.message}. #{wait_time}\u79d2\u5f8c\u306b\u518d\u8a66\u884c\")\n    end\n  end\nend\n\n# \u5b9f\u88c5\u4f8b\nclass PaymentGateway\n  def process_payment(payment)\n    APIClient.with_retry do\n      response = api_client.post('\/payments', payment.to_json)\n      handle_payment_response(response)\n    end\n  rescue APIError =&gt; e\n    handle_payment_error(e, payment)\n  end\n\n  private\n\n  def handle_payment_response(response)\n    case response.status\n    when 200..299\n      process_successful_payment(response.body)\n    else\n      raise PaymentProcessingError.new(\"\u652f\u6255\u3044\u51e6\u7406\u306b\u5931\u6557\u3057\u307e\u3057\u305f\", response: response)\n    end\n  end\n\n  def handle_payment_error(error, payment)\n    payment.update(status: :failed, error_message: error.message)\n    notify_payment_failure(payment, error)\n    raise PaymentError.new(\"\u652f\u6255\u3044\u51e6\u7406\u4e2d\u306b\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u307e\u3057\u305f\", original_error: error)\n  end\nend<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-33\">\u4e26\u884c\u51e6\u7406\u306b\u304a\u3051\u308b\u4f8b\u5916\u51e6\u7406\u306e\u6ce8\u610f\u70b9<\/h3>\n\n\n\n<p>\u4e26\u884c\u51e6\u7406\u3092\u884c\u3046\u969b\u306f\u3001\u30b9\u30ec\u30c3\u30c9\u3084\u30d7\u30ed\u30bb\u30b9\u9593\u3067\u306e\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u306b\u7279\u306b\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class BatchProcessor\n  class &lt;&lt; self\n    def process_in_parallel(items, max_threads: 5)\n      results = { successful: [], failed: [] }\n      mutex = Mutex.new\n      error_queue = Queue.new\n\n      ThreadsWait.all(*items.each_slice(items.size \/ max_threads).map { |batch|\n        Thread.new do\n          begin\n            process_batch(batch, mutex, results)\n          rescue StandardError =&gt; e\n            error_queue &lt;&lt; e\n          end\n        end\n      })\n\n      handle_thread_errors(error_queue)\n      results\n    end\n\n    private\n\n    def process_batch(items, mutex, results)\n      items.each do |item|\n        begin\n          processed_item = process_single_item(item)\n          mutex.synchronize { results[:successful] &lt;&lt; processed_item }\n        rescue StandardError =&gt; e\n          mutex.synchronize {\n            results[:failed] &lt;&lt; {\n              item: item,\n              error: e.message,\n              backtrace: e.backtrace&amp;.first(5)\n            }\n          }\n          log_processing_error(item, e)\n        end\n      end\n    end\n\n    def process_single_item(item)\n      # \u5177\u4f53\u7684\u306a\u51e6\u7406\u3092\u3053\u3053\u306b\u5b9f\u88c5\n      raise NotImplementedError\n    end\n\n    def handle_thread_errors(error_queue)\n      errors = []\n      until error_queue.empty?\n        errors &lt;&lt; error_queue.pop\n      end\n\n      return if errors.empty?\n\n      raise BatchProcessingError.new(\n        \"\u30d0\u30c3\u30c1\u51e6\u7406\u4e2d\u306b#{errors.size}\u4ef6\u306e\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u307e\u3057\u305f\",\n        errors: errors\n      )\n    end\n\n    def log_processing_error(item, error)\n      Rails.logger.error(\n        \"\u9805\u76ee\u51e6\u7406\u30a8\u30e9\u30fc: #{error.message}\\n\" \\\n        \"\u9805\u76ee: #{item.inspect}\\n\" \\\n        \"\u30d0\u30c3\u30af\u30c8\u30ec\u30fc\u30b9: #{error.backtrace&amp;.first(5)&amp;.join(\"\\n\")}\"\n      )\n    end\n  end\nend\n\n# \u4f7f\u7528\u4f8b\nclass ImageProcessor &lt; BatchProcessor\n  class &lt;&lt; self\n    private\n\n    def process_single_item(image)\n      validate_image(image)\n      resized_image = resize_image(image)\n      upload_to_storage(resized_image)\n      update_image_status(image)\n    rescue ImageValidationError =&gt; e\n      raise ImageProcessingError.new(\"\u753b\u50cf\u306e\u691c\u8a3c\u306b\u5931\u6557\u3057\u307e\u3057\u305f\", image: image, cause: e)\n    rescue ImageResizeError =&gt; e\n      raise ImageProcessingError.new(\"\u753b\u50cf\u306e\u30ea\u30b5\u30a4\u30ba\u306b\u5931\u6557\u3057\u307e\u3057\u305f\", image: image, cause: e)\n    rescue StorageError =&gt; e\n      raise ImageProcessingError.new(\"\u753b\u50cf\u306e\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u306b\u5931\u6557\u3057\u307e\u3057\u305f\", image: image, cause: e)\n    end\n  end\nend<\/pre>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u30d1\u30bf\u30fc\u30f3\u3068\u6ce8\u610f\u70b9\u3092\u9069\u5207\u306b\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u5805\u7262\u306a\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u3092\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Warning: Undefined array key &#8220;is_admin&#8221; in \/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/ &#8230; <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":{"0":"post-1511","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-ruby","7":"nothumb"},"_links":{"self":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/1511","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1511"}],"version-history":[{"count":1,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/1511\/revisions"}],"predecessor-version":[{"id":1512,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/1511\/revisions\/1512"}],"wp:attachment":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1511"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1511"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1511"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}