{"id":2216,"date":"2019-09-20T20:29:43","date_gmt":"2019-09-20T12:29:43","guid":{"rendered":"http:\/\/www.ponybai.com\/?p=2216"},"modified":"2019-09-20T20:29:43","modified_gmt":"2019-09-20T12:29:43","slug":"%e4%bd%bf%e7%94%a8%e7%bb%84%e7%bb%87%e5%92%8c%e4%bc%9a%e8%af%9d%e7%bc%93%e5%ad%98","status":"publish","type":"post","link":"http:\/\/www.ponybai.com\/?p=2216","title":{"rendered":"\u4f7f\u7528\u7ec4\u7ec7\u548c\u4f1a\u8bdd\u7f13\u5b58"},"content":{"rendered":"\n\t\t\t\t\n<h2 class=\"wp-block-heading\" id=\"Tdxn4tBK-heading1\">\u5b66\u4e60\u76ee\u6807<\/h2>\n\n\n\n<p>\u5b8c\u6210\u672c\u5355\u5143\u540e\uff0c\u60a8\u5c06\u80fd\u591f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>\u521b\u5efa\u4e00\u4e2a\u5206\u533a\u3002<\/li><li>\u5728\u7ec4\u7ec7\u548c\u4f1a\u8bdd\u7f13\u5b58\u4e2d\u5b58\u50a8\u548c\u68c0\u7d22\u503c\u3002<\/li><li>\u63cf\u8ff0\u7f13\u5b58\u4e2d\u7684\u503c\u7684\u6301\u7eed\u65f6\u95f4\u3002<\/li><li>\u5904\u7406\u7f13\u5b58\u672a\u547d\u4e2d\u3002<\/li><li>\u4eceVisualforce\u9875\u9762\u8bfb\u53d6\u4f1a\u8bdd\u7f13\u5b58\u3002<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"Tdxn4tBK-heading2\">\u521b\u5efa\u5206\u533a<\/h2>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/res.cloudinary.com\/hy4kyit2a\/f_auto,fl_lossy,q_70\/learn\/modules\/platform_cache\/platform_cache_use\/images\/c4d9ef0c272016519cf3740a5172d683_icon_note.png\" alt=\"\u6ce8\u610f\"\/><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\">\u6ce8\u610f<\/h4>\n\n\n\n<p><strong>\u8fd8\u6ca1\u6709\u7f13\u5b58\u8bd5\u7528\u7248\u5417\uff1f<\/strong>\u6b64\u5355\u5143\u9700\u8981\u6709\u6548\u7684Platform Cache\u8bd5\u7528\u7248\u3002\u4f7f\u7528\u4e0a\u4e00\u4e2a\u5355\u5143\u4e2d\u7684\u8bf4\u660e\u7533\u8bf7\u8bd5\u7528\u3002\u5982\u679c\u60a8\u6ca1\u6709\u7f13\u5b58\u8bd5\u7528\u7248\uff0c\u5219\u4ecd\u53ef\u4ee5\u6267\u884c\u672c\u673a\u4e2d\u7684\u6b65\u9aa4\uff0c\u4f46\u4e0d\u4f1a\u5728\u7f13\u5b58\u4e2d\u627e\u5230\u60a8\u7684\u6570\u636e\u3002<\/p>\n\n\n\n<p>\u8981\u4f7f\u7528Platform Cache\uff0c\u9996\u5148\u8981\u8bbe\u7f6e\u81f3\u5c11\u4e00\u4e2a\u5206\u533a\u3002\u8bbe\u7f6e\u5206\u533a\u540e\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528Platform Cache Apex API\u6dfb\u52a0\uff0c\u8bbf\u95ee\u548c\u5220\u9664\u6570\u636e\u3002<\/p>\n\n\n\n<p>\u6bcf\u4e2a\u5206\u533a\u90fd\u6709\u4e00\u4e2a\u4f1a\u8bdd\u7f13\u5b58\u548c\u4e00\u4e2a\u7ec4\u7ec7\u7f13\u5b58\u6bb5\u3002\u60a8\u53ef\u4ee5\u4e3a\u6bcf\u4e2a\u6bb5\u5206\u914d\u5355\u72ec\u7684\u5bb9\u91cf\u3002\u901a\u5e38\uff0c\u60a8\u4e3a\u5206\u533a\u5206\u914d\u81f3\u5c115 MB\u3002\u5bf9\u4e8e\u6b64\u793a\u4f8b\uff0c\u6211\u4eec\u4e0d\u5206\u914d\u4efb\u4f55\u7a7a\u95f4\u4ee5\u786e\u4fdd\u60a8\u7684\u4ee3\u7801\u6b63\u786e\u5904\u7406\u7f13\u5b58\u672a\u547d\u4e2d\u3002\u5f53\u6ca1\u6709\u5206\u914d\u7a7a\u95f4\u65f6\uff0c\u7f13\u5b58\u672a\u547d\u4e2d\u7387\u4e3a100\uff05\uff0c\u8fd9\u610f\u5473\u7740\u5728\u7f13\u5b58\u4e2d\u627e\u4e0d\u5230\u7f13\u5b58\u503c\uff0c\u5e76\u4e14\u5f97\u5230\uff08\uff09&nbsp;\u65b9\u6cd5\u8fd4\u56de&nbsp;\u7a7a\u503c\u3002\u8003\u8651\u4f7f\u7528\u6b64\u6280\u672f\u6765\u6d4b\u8bd5\u7f13\u5b58\u672a\u547d\u4e2d\u3002\u6211\u4eec\u5c06\u5728\u540e\u9762\u7684\u90e8\u5206\u4ecb\u7ecd\u5982\u4f55\u5904\u7406\u7f13\u5b58\u672a\u547d\u4e2d\u3002<\/p>\n\n\n\n<p>\u9996\u5148\uff0c\u8ba9\u6211\u4eec\u4ecePlatform Cache\u9875\u9762\u521b\u5efa\u4e00\u4e2a\u5206\u533a\uff08\u4ec5\u5728Salesforce Classic\u4e2d\u53ef\u7528\uff09\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>\u5728\u201c\u8bbe\u7f6e\u201d\u4e2d\uff0c\u8f93\u5165Platform Cache\u201c&nbsp;\u5feb\u901f\u67e5\u627e\u201d\u6846\uff0c\u7136\u540e\u9009\u62e9\u201c&nbsp;<strong>\u5e73\u53f0\u7f13\u5b58\u201d<\/strong>\u3002<\/li><li>\u5355\u51fb\u201c&nbsp;<strong>\u65b0\u5efa\u5e73\u53f0\u7f13\u5b58\u5206\u533a\u201d<\/strong>\u3002<\/li><li>\u4e3a\u5206\u533a\u6307\u5b9a\u540d\u79f0\uff08\u4f8b\u5982\u5e94\u7528\u7a0b\u5e8f\u7684\u540d\u79f0\uff09\u3002<\/li><li>\u68c0\u67e5<strong>\u9ed8\u8ba4\u5206\u533a<\/strong>\u3002<\/li><li>\u8f93\u51650\u4f1a\u8bdd\u7f13\u5b58\u548c0\u7ec4\u7ec7\u7f13\u5b58\uff0c\u7136\u540e\u5355\u51fb\u201c&nbsp;<strong>\u4fdd\u5b58\u201d<\/strong>\u3002<\/li><\/ol>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"Tdxn4tBK-heading3\">\u7f13\u5b58\u5bc6\u94a5\u540d\u79f0\u683c\u5f0f<\/h2>\n\n\n\n<p>\u6bcf\u4e2a\u7f13\u5b58\u952e\u5177\u6709\u4ee5\u4e0b\u683c\u5f0f\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Namespace.Partition.Key<\/code><\/pre>\n\n\n\n<p>\u540d\u79f0\u7a7a\u95f4\u662f\u8fd0\u884c\u5e94\u7528\u7a0b\u5e8f\u7684\u7ec4\u7ec7\u7684\u540d\u79f0\u7a7a\u95f4\u540d\u79f0\uff0c\u4e5f\u53ef\u4ee5\u8bbe\u7f6e\u4e3a\u7279\u6b8a\u540d\u79f0\u201clocal\u201d\u3002\u201c\u672c\u5730\u201d\u540d\u79f0\u662f\u6307\u7ec4\u7ec7\u7684\u540d\u79f0\u7a7a\u95f4\u662f\u5426\u5728\u7ec4\u7ec7\u4e2d\u5b9a\u4e49\u4e86\u540d\u79f0\u7a7a\u95f4\u3002<\/p>\n\n\n\n<p>\u5206\u533a\u662f\u60a8\u521b\u5efa\u7684\u5206\u533a\u7684\u540d\u79f0\u3002\u5728\u6b64\u793a\u4f8b\u4e2d\uff0c\u5b83\u662fCurrencyCache\u3002<\/p>\n\n\n\n<p>Key\u662f\u7528\u4e8e\u5b58\u50a8\u503c\u7684\u952e\u7684\u540d\u79f0\u3002\u952e\u540d\u552f\u4e00\u5730\u8868\u793a\u60a8\u7684\u7f13\u5b58\u503c\u3002<\/p>\n\n\n\n<p>\u5047\u8bbe\u6211\u4eec\u60f3\u5c06\u8d27\u5e01\u6c47\u7387\u4ece\u7f8e\u5143\u5b58\u50a8\u5230\u6b27\u5143\u3002\u6211\u4eec\u53ef\u4ee5\u521b\u5efa\u4e00\u4e2a\u540d\u4e3aDollarToEuroRate\u7684\u5bc6\u94a5\u3002\u5bf9\u4e8e\u6211\u4eec\u521a\u521a\u521b\u5efa\u7684\u5206\u533a\uff0c\u5bc6\u94a5\u7684\u5168\u540d\u662f\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>local.CurrencyCache.DollarToEuroRate<\/code><\/pre>\n\n\n\n<p>\u4f8b\u5982\uff0c\u6b64\u4ee3\u7801\u6bb5\u5b58\u50a8\u4e86DollarToEuroRate\u952e\u7684\u7ec4\u7ec7\u7f13\u5b58\u4e2d\u7684\u503c\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Cache.Org.put('local.CurrencyCache.DollarToEuroRate', '0.91');<\/code><\/pre>\n\n\n\n<p>\u6211\u4eec\u521b\u5efa\u7684\u5206\u533a\u662f\u9ed8\u8ba4\u5206\u533a\uff0c\u56e0\u6b64\u60a8\u53ef\u4ee5\u7701\u7565\u547d\u540d\u7a7a\u95f4\u548c\u5206\u533a\u540d\u79f0\uff0c\u53ea\u9700\u6307\u5b9a\u5bc6\u94a5\u540d\u79f0\u5373\u53ef\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>DollarToEuroRate<\/code><\/pre>\n\n\n\n<p>\u4f7f\u7528\u9ed8\u8ba4\u5206\u533a\u65f6\uff0c\u53ef\u4ee5\u5c06put\uff08\uff09\u8c03\u7528\u7f29\u77ed\u4e3a\u4ee5\u4e0b\u5185\u5bb9\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Cache.Org.put('DollarToEuroRate', '0.91');<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"Tdxn4tBK-heading4\">\u5728\u7ec4\u7ec7\u7f13\u5b58\u4e2d\u5b58\u50a8\u548c\u68c0\u7d22\u6570\u636e<\/h2>\n\n\n\n<p>\u60a8\u5df2\u5b8c\u6210\u8bbe\u7f6e\u5206\u533a\uff0c\u8fd9\u662f\u60a8\u5728\u7528\u6237\u754c\u9762\u4e2d\u6267\u884c\u7684\u552f\u4e00\u6b65\u9aa4\u3002\u73b0\u5728\u6211\u4eec\u5c06\u5207\u6362\u5230Apex\u6765\u7ba1\u7406\u7f13\u5b58\u3002\u4f7f\u7528\u7ec4\u7ec7\u7f13\u5b58\u6765\u5b58\u50a8\u7ec4\u7ec7\u4e2d\u4efb\u4f55\u4eba\u90fd\u53ef\u4ee5\u4f7f\u7528\u7684\u6570\u636e\u3002\u8981\u4e48\u4f7f\u7528Cache.Org&nbsp;\u7c7b\u65b9\u6cd5\uff0c\u6216\u4f7f\u7528&nbsp;Cache.OrgPartition\u7528\u4e8e\u5f15\u7528\u7279\u5b9a\u5206\u533a\u7684\u7c7b\u3002\u7136\u540e\u8c03\u7528\u8be5\u5206\u533a\u4e0a\u7684\u7f13\u5b58\u65b9\u6cd5\u3002<\/p>\n\n\n\n<p>\u4ee5\u4e0bApex\u4ee3\u7801\u6bb5\u663e\u793a\u4e86\u5982\u4f55\u4f7f\u7528\u3002\u8bbf\u95ee\u5206\u533a&nbsp;Cache.OrgPartition\u7528\u4e8e\u5b58\u50a8\u548c\u68c0\u7d22\u8d27\u5e01\u5151\u6362\u5e94\u7528\u7a0b\u5e8f\u7684\u7f13\u5b58\u503c\u7684\u7c7b\u3002\u5b83\u5728\u672c\u5730\u540d\u79f0\u7a7a\u95f4\u4e2d\u83b7\u53d6\u540d\u4e3aCurrencyCache\u7684\u5206\u533a\u3002\u4f7f\u7528\u5173\u952e\u7684DollarToEuroRate\u548c\u4eca\u5929\u7684\u8d27\u5e01\u6c47\u7387\u6dfb\u52a0\u65b0\u503c&nbsp;\u3002\u63a5\u4e0b\u6765\uff0c\u4ece\u7f13\u5b58\u4e2d\u68c0\u7d22\u5173\u952eDollarToEuroRate\u7684\u503c\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/ Get partition\nCache.OrgPartition orgPart = Cache.Org.getPartition('local.CurrencyCache');\n\/\/ Add cache value to the partition. Usually, the value is obtained from a \n\/\/ callout, but hardcoding it in this example for simplicity.\norgPart.put('DollarToEuroRate', '0.91');\n\/\/ Retrieve cache value from the partition\nString cachedRate = (String)orgPart.get('DollarToEuroRate');<\/code><\/pre>\n\n\n\n<p>\u5982\u679c\u60a8\u53ea\u5728\u4e00\u4e2a\u5206\u533a\u4e2d\u7ba1\u7406\u7f13\u5b58\u503c\uff0c\u8bf7\u4f7f\u7528&nbsp;Cache.OrgPartition\u65b9\u6cd5\u3002\u8be5Cache.OrgPartition&nbsp;\u65b9\u6cd5\u6bd4\u4f7f\u7528\u8d77\u6765\u66f4\u5bb9\u6613&nbsp;Cache.Org&nbsp;\u65b9\u6cd5\uff0c\u56e0\u4e3a\u5728\u521b\u5efa\u5206\u533a\u5bf9\u8c61\u65f6\u53ea\u6307\u5b9a\u4e86\u4e00\u6b21\u547d\u540d\u7a7a\u95f4\u548c\u5206\u533a\u524d\u7f00\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"Tdxn4tBK-heading5\">\u7f13\u5b58\u4ef7\u503c\u6700\u540e\u4e00\u6b21\uff1f<\/h2>\n\n\n\n<p>\u524d\u9762\u7684\u4f8b\u5b50\u5047\u8bbe\u4e00\u5207\u6b63\u5e38\uff0c\u5373\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>\u5e73\u53f0\u7f13\u5b58\u5df2\u542f\u7528\uff0c\u5e76\u5177\u6709\u53ef\u7528\u7a7a\u95f4\u7684\u5206\u533a<\/li><li>\u7f13\u5b58\u4e2d\u7684\u7f13\u5b58\u503c<\/li><li>\u8be5\u503c\u5df2\u6210\u529f\u5b58\u50a8\u5728\u7f13\u5b58\u4e2d<\/li><\/ul>\n\n\n\n<p>\u4f46\u5728\u73b0\u5b9e\u751f\u6d3b\u4e2d\uff0c\u7f13\u5b58\u6570\u636e\u5e76\u4e0d\u603b\u80fd\u5f97\u5230\u4fdd\u8bc1\u3002\u5e73\u53f0\u7f13\u5b58\u65e8\u5728\u4f5c\u4e3a\u4e34\u65f6\u7a7a\u95f4\u3002\u4f8b\u5982\uff0c\u7f13\u5b58\u53ef\u80fd\u5df2\u8fc7\u671f\u3002\u5373\u4f7f\u7f13\u5b58\u4ecd\u5904\u4e8e\u6d3b\u52a8\u72b6\u6001\uff0c\u60a8\u7684\u7f13\u5b58\u6570\u636e\u4e5f\u53ef\u80fd\u4f1a\u4ece\u7f13\u5b58\u4e2d\u9010\u51fa\u3002\u5c31\u50cf\u82b1\u6817\u9f20\u6e05\u7406\u4ed6\u4eec\u7684\u8138\u988a\u4ee5\u817e\u51fa\u66f4\u591a\u6a61\u5b50\u7684\u7a7a\u95f4\u4e00\u6837\uff0cPlatform Cache\u4e5f\u53ef\u4ee5\u6e05\u9664\u4e00\u4e9b\u7a7a\u95f4\u4ee5\u83b7\u5f97\u66f4\u591a\u6570\u636e\uff01\u8d85\u51fa\u5206\u533a\u9650\u5236\u65f6\uff0cSalesforce\u4f1a\u6839\u636e\u6700\u8fd1\u6700\u5c11\u4f7f\u7528\uff08LRU\uff09\u7b97\u6cd5\u9a71\u9010\u7f13\u5b58\u6570\u636e\u3002\u9ad8\u901f\u7f13\u5b58\u9010\u51fa\u76f4\u5230\u4f7f\u7528\u51cf\u5c11\u5230\u5c0f\u4e8e\u6216\u7b49\u4e8e100\uff05\u5bb9\u91cf\u3002\u6b64\u5916\uff0c\u5982\u679c\u8d85\u51fa\u672c\u5730\u7f13\u5b58\u9650\u5236\uff0c\u5219\u53ef\u4ee5\u5728\u63d0\u4ea4\u8bf7\u6c42\u4e4b\u524d\u4ece\u672c\u5730\u7f13\u5b58\u4e2d\u9010\u51fa\u9879\u76ee\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"Tdxn4tBK-heading6\">\u7f13\u5b58\u6570\u636e\u6301\u7eed\u65f6\u95f4\u548c\u5230\u671f\u65f6\u95f4<\/h3>\n\n\n\n<p>\u6570\u636e\u4fdd\u5b58\u5728\u7f13\u5b58\u4e2d\u7684\u65f6\u95f4\u79f0\u4e3a\u751f\u5b58\u65f6\u95f4\u503c\uff08ttlsecs\uff09\u3002\u4f7f\u7528Apex\u65b9\u6cd5\u5728\u7f13\u5b58\u4e2d\u5b58\u50a8\u952e\u503c\u5bf9\u65f6\uff0c\u53ef\u4ee5\u6307\u5b9a\u751f\u5b58\u65f6\u95f4\u503c\u3002\u5bf9\u4e8e\u4f1a\u8bdd\u7f13\u5b58\uff0c\u60a8\u7684\u6570\u636e\u6700\u591a\u53ef\u5728\u7f13\u5b58\u4e2d\u4fdd\u5b588\u5c0f\u65f6\u3002\u5bf9\u4e8e\u7ec4\u7ec7\u7f13\u5b58\uff0c\u60a8\u7684\u6570\u636e\u6700\u591a\u53ef\u5728\u7f13\u5b58\u4e2d\u8fd0\u884c48\u5c0f\u65f6\u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u7ec4\u7ec7\u7f13\u5b58\u7684\u751f\u5b58\u65f6\u95f4\u503c\u4e3a24\u5c0f\u65f6\u3002<\/p>\n\n\n\n<p>\u4f1a\u8bdd\u7f13\u5b58\u5728\u8fbe\u5230\u5176\u6307\u5b9a\u7684\u751f\u5b58\u65f6\u95f4\u503c\u6216\u7528\u6237\u4f1a\u8bdd\u5230\u671f\u65f6\uff08\u4ee5\u5148\u5230\u8005\u4e3a\u51c6\uff09\u5230\u671f\u3002\u7ec4\u7ec7\u7f13\u5b58\u5728\u8fbe\u5230\u5176\u6307\u5b9a\u7684\u751f\u5b58\u65f6\u95f4\u503c\u65f6\u5230\u671f\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"Tdxn4tBK-heading7\">\u5904\u7406\u7f13\u5b58\u672a\u547d\u4e2d\u7684\u6700\u4f73\u5b9e\u8df5<\/h2>\n\n\n\n<p>\u4f5c\u4e3a\u6700\u4f73\u5b9e\u8df5\uff0c\u60a8\u7684\u4ee3\u7801\u5e94\u8be5\u9884\u89c1\u5e76\u5bb9\u7eb3\u6545\u969c\u70b9\u3002\u6362\u53e5\u8bdd\u8bf4\uff0c\u59cb\u7ec8\u5047\u8bbe\u53ef\u80fd\u53d1\u751f\u7f13\u5b58\u672a\u547d\u4e2d\u3002\u7f13\u5b58\u672a\u547d\u4e2d\u662f\u6307\u4ece\u7f13\u5b58\u4e2d\u8bf7\u6c42\u5bc6\u94a5\u503c\u4f46\u672a\u627e\u5230\u503c\u7684\u60c5\u51b5\u3002\u4f60\u7684\u4ef7\u503c&nbsp;\u5f97\u5230\uff08\uff09call returns\u4e3anull\u3002\u68c0\u67e5\u7ed3\u679c\u5f97\u5230\uff08\uff09\u8c03\u7528null\u5e76\u76f8\u5e94\u5730\u5904\u7406\u5b83\u3002\u4f8b\u5982\uff0c\u5982\u679c\u7ed3\u679c\u662f\u7a7a\u503c\uff0c\u4ece\u6570\u636e\u5e93\u6216API\u8c03\u7528\u4e2d\u83b7\u53d6\u503c\u3002<\/p>\n\n\n\n<p>\u4ee5\u4e0bApex\u4ee3\u7801\u6bb5\u663e\u793a\u4e86\u5982\u4f55\u901a\u8fc7\u68c0\u67e5\u7f13\u5b58\u4e2d\u8fd4\u56de\u7684\u503c\u662f\u5426\u6765\u5904\u7406\u7f13\u5b58\u672a\u547d\u4e2d&nbsp;\u7a7a\u503c&nbsp;\uff08if\uff08cachedRate\uff01= null\uff09\uff09\u3002\u5982\u679c\u503c\u4e0d\u662f\u7a7a\u503c\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528\u8be5\u503c\uff0c\u4f8b\u5982\uff0c\u5728\u9875\u9762\u4e0a\u663e\u793a\u5b83\u3002\u5426\u5219\uff0c\u4ece\u5176\u4ed6\u6e90\uff08\u4f8b\u5982API\u8c03\u7528\u6216Salesforce\uff09\u83b7\u53d6\u6b64\u503c\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Cache.OrgPartition orgPart = Cache.Org.getPartition('local.CurrencyCache');\nString cachedRate = (String)orgPart.get('DollarToEuroRate');\n\/\/ Check the cache value that the get() call returned.\nif (cachedRate != null) {\n    \/\/ Display this exchange rate   \n} else {\n    \/\/ We have a cache miss, so fetch the value from the source.\n    \/\/ Call an API to get the exchange rate.\n}<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"Tdxn4tBK-heading8\">\u5728\u4f1a\u8bdd\u7f13\u5b58\u4e2d\u5b58\u50a8\u548c\u68c0\u7d22\u6570\u636e<\/h2>\n\n\n\n<p>\u8fd8\u8bb0\u5f97\u4ec0\u4e48\u4f1a\u8bdd\u7f13\u5b58\u5417\uff1f\u6ca1\u9519\uff0c\u5b83\u5b58\u50a8\u4e0e\u5404\u4e2a\u7528\u6237\u4f1a\u8bdd\u76f8\u5173\u7684\u6570\u636e\u3002\u4f8b\u5982\uff0c\u60a8\u53ef\u4ee5\u5728\u5e94\u7528\u7a0b\u5e8f\u4e2d\u4f7f\u7528\u4f1a\u8bdd\u7f13\u5b58\u6765\u5b58\u50a8\u7528\u6237\u559c\u6b22\u7684\u8d27\u5e01\u6216\u7528\u6237\u7684\u81ea\u5b9a\u4e49\u5bfc\u822a\u9009\u9879\u5361\u987a\u5e8f\u3002\u4f7f\u7528\u4f1a\u8bdd\u7f13\u5b58\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528Visualforce\u5168\u5c40\u53d8\u91cf\u7ba1\u7406Apex\u4e2d\u7684\u7f13\u5b58\u503c\u5e76\u8bfb\u53d6\u7f13\u5b58\u503c\u3002<\/p>\n\n\n\n<p>\u4f7f\u7528Apex\u65f6\uff0c\u7ba1\u7406\u4f1a\u8bdd\u7f13\u5b58\u4e0e\u7ba1\u7406\u7ec4\u7ec7\u7f13\u5b58\u7684\u65b9\u5f0f\u7c7b\u4f3c\uff0c\u4f46\u7c7b\u540d\u4e0d\u540c\u3002\u4f7f\u7528Cache.Session&nbsp;\u548c&nbsp;Cache.SessionPartition\u7528\u4e8e\u8bbf\u95ee\u5b58\u50a8\u5728\u4f1a\u8bdd\u9ad8\u901f\u7f13\u5b58\u4e2d\u7684\u503c\u7684\u7c7b\u3002\u8981\u7ba1\u7406\u4efb\u4f55\u5206\u533a\u4e2d\u7684\u503c\uff0c\u8bf7\u4f7f\u7528\u4e2d\u7684\u65b9\u6cd5Cache.Session&nbsp;\u7c7b\u3002\u5982\u679c\u60a8\u53ea\u5728\u4e00\u4e2a\u5206\u533a\u4e2d\u7ba1\u7406\u7f13\u5b58\u503c\uff0c\u8bf7\u4f7f\u7528Cache.SessionPartition\u65b9\u6cd5\u800c\u4e0d\u662f\u3002\u8be5Cache.SessionPartition&nbsp;\u65b9\u6cd5\u6bd4\u4f7f\u7528\u8d77\u6765\u66f4\u5bb9\u6613&nbsp;Cache.Session&nbsp;\u65b9\u6cd5\uff0c\u56e0\u4e3a\u5728\u521b\u5efa\u5206\u533a\u5bf9\u8c61\u65f6\u53ea\u6307\u5b9a\u4e86\u4e00\u6b21\u547d\u540d\u7a7a\u95f4\u548c\u5206\u533a\u524d\u7f00\u3002<\/p>\n\n\n\n<p>\u4ee5\u4e0b\u7684Apex\u4ee3\u7801\u7247\u6bb5\u663e\u793a\u4e86\u5982\u4f55\u8bbf\u95ee\u5206\u533a\u4ee5\u5b58\u50a8\u548c\u68c0\u7d22\u7f13\u5b58\u503c\u3002\u5b83\u5728\u672c\u5730\u540d\u79f0\u7a7a\u95f4\u4e2d\u83b7\u53d6\u540d\u4e3aCurrencyCache\u7684\u5206\u533a\u3002\u4f7f\u7528\u5173\u952e\u7684FavoriteCurrency\u6dfb\u52a0\u65b0\u503c\u3002\u68c0\u7d22FavoriteCurrency\u5bc6\u94a5\u7684\u503c&nbsp;\u3002\u8be5&nbsp;FavoriteCurrency\u5bc6\u94a5\u5b58\u50a8\u7528\u6237\u7684\u559c\u7231\u8d27\u5e01\uff0c\u6240\u4ee5\u8fd9\u4e2a\u503c\u662f\u4e3a\u6bcf\u4e2a\u7528\u6237\uff0c\u56e0\u6b64\u4e00\u4e2a\u5f88\u597d\u7684\u5019\u9009\u4eba\u4f1a\u8bdd\u7f13\u5b58\u4e0d\u540c\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/ Get partition\nCache.SessionPartition sessionPart = Cache.Session.getPartition('local.CurrencyCache');\n\/\/ Add cache value to the partition\nsessionPart.put('FavoriteCurrency', 'JPY');\n\/\/ Retrieve cache value from the partition\nString cachedRate = (String)sessionPart.get('FavoriteCurrency');<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"Tdxn4tBK-heading9\">\u4f7f\u7528Visualforce\u5168\u5c40\u53d8\u91cf\u8bbf\u95ee\u5e73\u53f0\u7f13\u5b58<\/h2>\n\n\n\n<p>\u901a\u8fc7\u4f7f\u7528\uff0c\u4eceVisualforce\u9875\u9762\u8bbf\u95ee\u5b58\u50a8\u5728\u5e73\u53f0\u7f13\u5b58\u4e2d\u7684\u7f13\u5b58\u503c&nbsp;$ Cache.Session&nbsp;\u8981\u4e48&nbsp;$ Cache.Org\u5168\u5c40\u53d8\u91cf\u3002\u901a\u8fc7\u4f7f\u7528\u8fd9\u4e9b\u5168\u5c40\u53d8\u91cf\uff0c\u60a8\u53ef\u4ee5\u76f4\u63a5\u4eceVisualforce\u9875\u9762\u8bfb\u53d6\u4e0eApex\u4e00\u8d77\u5b58\u50a8\u7684\u7f13\u5b58\u503c\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/res.cloudinary.com\/hy4kyit2a\/f_auto,fl_lossy,q_70\/learn\/modules\/platform_cache\/platform_cache_use\/images\/c4d9ef0c272016519cf3740a5172d683_icon_note.png\" alt=\"\u6ce8\u610f\"\/><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\">\u6ce8\u610f<\/h4>\n\n\n\n<p>\u4ee5\u4e0b\u793a\u4f8b\u663e\u793a\u5982\u4f55\u4f7f\u7528\u3002\u8bbf\u95ee\u4f1a\u8bdd\u9ad8\u901f\u7f13\u5b58&nbsp;$ Cache.Session\u5168\u5c40\u53d8\u91cf\u3002\u9664\u4e86\u4f7f\u7528\u4e4b\u5916\uff0c\u7b49\u6548\u7684org\u7f13\u5b58\u793a\u4f8b\u662f\u76f8\u540c\u7684$ Cache.Org&nbsp;\u800c\u662f\u5168\u5c40\u53d8\u91cf\u3002<\/p>\n\n\n\n<p>\u4f7f\u7528\u65f6&nbsp;$ Cache.Session\u5168\u5c40\u53d8\u91cf\uff0c\u4f7f\u7528\u547d\u540d\u7a7a\u95f4\u548c\u5206\u533a\u540d\u79f0\u5b8c\u5168\u9650\u5b9a\u5bc6\u94a5\u540d\u79f0\u3002\u6b64\u793a\u4f8b\u662f\u4e00\u4e2a\u8f93\u51fa\u6587\u672c\u7ec4\u4ef6\uff0c\u7528\u4e8e\u4ece\u547d\u540d\u7a7a\u95f4\u4e2d\u68c0\u7d22\u7f13\u5b58\u7684\u503c\u827e\u535a\uff0c \u5212\u5206&nbsp;CurrencyCache\u548c\u5173\u952e&nbsp;FavoriteCurrencyRate\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&lt;apex:outputText value=\"{!$Cache.Session.ExPro.CurrencyCache.FavoriteCurrencyRate}\"\/><\/code><\/pre>\n\n\n\n<p>\u4e0eApex\u65b9\u6cd5\u4e0d\u540c\uff0c\u60a8\u4e0d\u80fd\u7701\u7565&nbsp;namespace.partition\u524d\u7f00\u4ee5\u5f15\u7528\u7ec4\u7ec7\u4e2d\u7684\u9ed8\u8ba4\u5206\u533a\u3002\u5982\u679c\u6ca1\u6709\u4e3a\u7ec4\u7ec7\u5b9a\u4e49\u540d\u79f0\u7a7a\u95f4\uff0c\u8bf7\u4f7f\u7528\u672c\u5730&nbsp;\u5f15\u7528\u8fd0\u884c\u4ee3\u7801\u7684\u5f53\u524d\u7ec4\u7ec7\u7684\u547d\u540d\u7a7a\u95f4\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&lt;apex:outputText value=\"{!$Cache.Session.local.MyPartition.Key}\"\/><\/code><\/pre>\n\n\n\n<p>\u5982\u679c\u7f13\u5b58\u7684\u503c\u662f\u5177\u6709\u5c5e\u6027\u6216\u65b9\u6cd5\u7684\u6570\u636e\u7ed3\u6784\uff0c\u5982Apex List\u6216\u81ea\u5b9a\u4e49\u7c7b\uff0c\u5219\u8bbf\u95ee\u8fd9\u4e9b\u5c5e\u6027&nbsp;$ Cache.Session\u8868\u8fbe\u5f0f\u4f7f\u7528\u70b9\u8868\u793a\u6cd5\u3002\u4f8b\u5982\uff0c\u6b64\u6807\u8bb0\u8c03\u7528\u5219\u4e3alist.size\uff08\uff09&nbsp;\u5982\u679c\u662fApex\u65b9\u6cd5\u7684\u503c&nbsp;numbersList&nbsp;\u88ab\u58f0\u660e\u4e3aList\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&lt;apex:outputText value=\"{!$Cache.Session.local.MyPartition.numbersList.size}\"\/><\/code><\/pre>\n\n\n\n<p>\u6b64\u793a\u4f8b\u8bbf\u95eeon\u4e0a\u7684value\u5c5e\u6027&nbsp;MYDATA\u7684&nbsp;\u58f0\u660e\u4e3a\u81ea\u5b9a\u4e49\u7c7b\u7684\u7f13\u5b58\u503c\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&lt;apex:outputText value=\"{!$Cache.Session.local.MyPartition.myData.value}\"\/><\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"Tdxn4tBK-heading10\">ISV\u5e94\u7528\u7a0b\u5e8f\u7684\u53d7\u4fdd\u62a4\u7f13\u5b58\u5206\u914d<\/h2>\n\n\n\n<p>\u901a\u8fc7\u4f7f\u7528\u5e73\u53f0\u7f13\u5b58\uff0cISV\u5e94\u7528\u7a0b\u5e8f\u8fd0\u884c\u901f\u5ea6\u66f4\u5feb\uff0c\u6027\u80fd\u66f4\u4f73\u3002\u5982\u679c\u60a8\u662fISV\u5f00\u53d1\u4eba\u5458\uff0c\u5219\u53ef\u4ee5\u901a\u8fc7\u4e3a\u81ea\u5df1\u7684\u547d\u540d\u7a7a\u95f4\u8d2d\u4e70\u7f13\u5b58\u7a7a\u95f4\u6765\u4fdd\u8bc1\u5e94\u7528\u7a0b\u5e8f\u7684\u7f13\u5b58\u7a7a\u95f4\u3002\u8fd9\u6837\uff0c\u5f53\u60a8\u7684\u5e94\u7528\u5b89\u88c5\u5728\u8ba2\u9605\u8005\u7ec4\u7ec7\u4e2d\u65f6\uff0c\u5e94\u7528\u7f13\u5b58\u7684\u7a7a\u95f4\u4e0d\u4f1a\u53d7\u5230\u8ba2\u9605\u8005\u7ec4\u7ec7\u4e2d\u7f13\u5b58\u4f7f\u7528\u7684\u5f71\u54cd\u3002\u53ea\u6709\u4ece\u5e94\u7528\u7a0b\u5e8f\u547d\u540d\u7a7a\u95f4\u8fd0\u884c\u7684Apex\u4ee3\u7801\u624d\u80fd\u8bbf\u95ee\u548c\u4f7f\u7528\u547d\u540d\u7a7a\u95f4\u7684\u7f13\u5b58\u3002\u8ba2\u9605\u8005\u7ec4\u7ec7\u4e2d\u6ca1\u6709\u5176\u4ed6\u4ee3\u7801\u53ef\u4ee5\u4f7f\u7528\u6b64\u7f13\u5b58\u3002\u60a8\u53ef\u4ee5\u6839\u636e\u547d\u540d\u7a7a\u95f4\u7684\u7f13\u5b58\u6d4b\u8bd5\u60a8\u7684\u5e94\u7528\u7a0b\u5e8f\uff0c\u5e76\u786e\u4fdd\u7f13\u5b58\u5206\u914d\u5c06\u5728\u6bcf\u4e2a\u8ba2\u9605\u8005\u7ec4\u7ec7\u4e2d\u53d7\u5230\u4fdd\u62a4\u3002<\/p>\n\n\n\n<p>\u7f13\u5b58\u5206\u533a\u4f5c\u4e3a\u5e94\u7528\u7a0b\u5e8f\u5305\u7684\u4e00\u90e8\u5206\u5206\u53d1\u7ed9\u8ba2\u9605\u8005\u3002\u5c06\u547d\u540d\u7a7a\u95f4\u7684\u4e00\u4e2a\u6216\u591a\u4e2a\u7f13\u5b58\u5206\u533a\u4f5c\u4e3a\u7ec4\u4ef6\u6dfb\u52a0\u5230\u5305\u4e2d\uff0c\u65b9\u6cd5\u4e0e\u6dfb\u52a0\u5176\u4ed6\u7ec4\u4ef6\u76f8\u540c\u3002\u7f13\u5b58\u5206\u533a\u4e0d\u4f1a\u81ea\u52a8\u6dfb\u52a0\u4e3a\u4f9d\u8d56\u7ec4\u4ef6\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/res.cloudinary.com\/hy4kyit2a\/f_auto,fl_lossy,q_70\/learn\/modules\/platform_cache\/platform_cache_use\/images\/85bdf15d1d17d0011c6ded9b297aae98_platform_cache_package_annotated.jpg\" alt=\"\u5305\u542b\u7f13\u5b58\u5206\u533a\u7684\u5305\u7ec4\u4ef6\u5217\u8868\"\/><\/figure>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/res.cloudinary.com\/hy4kyit2a\/f_auto,fl_lossy,q_70\/learn\/modules\/platform_cache\/platform_cache_use\/images\/c4d9ef0c272016519cf3740a5172d683_icon_note.png\" alt=\"\u6ce8\u610f\"\/><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\">\u6ce8\u610f<\/h4>\n\n\n\n<p>\u8bf7\u53c2\u9605\u4ee5\u4e0b\u6709\u5173\u6253\u5305\u5206\u533a\u7684\u4fe1\u606f<\/p>\n\n\n\n<ul 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\u63cf\u8ff0\u7f13\u5b58\u4e2d\u7684\u503c\u7684\u6301\u7eed\u65f6\u95f4 &hellip; <a href=\"http:\/\/www.ponybai.com\/?p=2216\" class=\"more-link\">\u7ee7\u7eed\u9605\u8bfb<span class=\"screen-reader-text\">\u4f7f\u7528\u7ec4\u7ec7\u548c\u4f1a\u8bdd\u7f13\u5b58<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[178],"tags":[],"class_list":["post-2216","post","type-post","status-publish","format-standard","hentry","category-platform-cache"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.7 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u4f7f\u7528\u7ec4\u7ec7\u548c\u4f1a\u8bdd\u7f13\u5b58 - \u767d\u767d\u968f\u7b14<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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