{"id":648,"date":"2023-12-14T09:01:02","date_gmt":"2023-12-14T01:01:02","guid":{"rendered":""},"modified":"2023-12-14T09:01:02","modified_gmt":"2023-12-14T01:01:02","slug":"redis\u7f13\u5b58\u4e3a\u4ec0\u4e48\u8981\u5ef6\u65f6\u53cc\u5220","status":"publish","type":"post","link":"https:\/\/mushiming.com\/648.html","title":{"rendered":"redis\u7f13\u5b58\u4e3a\u4ec0\u4e48\u8981\u5ef6\u65f6\u53cc\u5220"},"content":{"rendered":"<p><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" style=\"display: none;\"> \n <path stroke-linecap=\"round\" d=\"M5,0 0,2.5 5,5z\" id=\"raphael-marker-block\" style=\"-webkit-tap-highlight-color: rgba(0, 0, 0, 0);\"><\/path> \n<\/svg> <\/p>\n<h3>\u4e00\u3001\u53ea\u5148\u5220\u7f13\u5b58<\/h3>\n<p>\u95ee\u9898\uff1a\u5148\u5220\u7f13\u5b58\uff0c\u5728\u6539\u5e93\u524d\uff0c\u5176\u4ed6\u4e8b\u52a1\u53c8\u628a\u65e7\u6570\u636e\u653e\u5230\u7f13\u5b58\u91cc\u53bb\u4e86\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/img.mushiming.top\/app\/common_img\/b5a79e5a44bc4b209a4ec126ae724bb6.png\" =\"\" =\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" alt=\"redis\u7f13\u5b58\u4e3a\u4ec0\u4e48\u8981\u5ef6\u65f6\u53cc\u5220 (https:\/\/mushiming.com\/) \u6280\u672f\u535a\u5ba2 \u7b2c1\u5f20\" title=\"redis\u7f13\u5b58\u4e3a\u4ec0\u4e48\u8981\u5ef6\u65f6\u53cc\u5220 \u6280\u672f\u535a\u5ba2 \u7b2c1\u5f20-\u7a46\u4e16\u660e\u535a\u5ba2\" ><\/p>\n<h3>\u4e8c\u3001\u53ea\u540e\u5220\u7f13\u5b58<\/h3>\n<p>\u95ee\u98981\uff1a\u6539\u4e86\u5e93\uff0c\u6e05\u7406\u7f13\u5b58\u524d\uff0c\u6709\u90e8\u5206\u4e8b\u52a1\u8fd8\u662f\u4f1a\u62ff\u5230\u65e7\u7f13\u5b58<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/img.mushiming.top\/app\/common_img\/526a3e9af1cf430abc8dc76b7195f727.png\" =\"\" =\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" alt=\"redis\u7f13\u5b58\u4e3a\u4ec0\u4e48\u8981\u5ef6\u65f6\u53cc\u5220 (https:\/\/mushiming.com\/) \u6280\u672f\u535a\u5ba2 \u7b2c2\u5f20\" title=\"redis\u7f13\u5b58\u4e3a\u4ec0\u4e48\u8981\u5ef6\u65f6\u53cc\u5220 \u6280\u672f\u535a\u5ba2 \u7b2c2\u5f20-\u7a46\u4e16\u660e\u535a\u5ba2\" ><\/p>\n<p>\u95ee\u98982\uff1a\u4e3a\u4e86\u907f\u514d\u7f13\u5b58\u6e05\u9664\u5931\u8d25\u5e26\u6765\u7684\u98ce\u9669\uff0c\u8d77\u5230\u5728\u6bcf\u6b21\u64cd\u4f5c\u6570\u636e\u5e93\u4e4b\u524d\uff0c\u90fd\u8fd8\u539f\u5230\u6ca1\u6709\u4ea7\u751f\u7f13\u5b58\u4e4b\u524d\u7684\u6548\u679c\u3002\uff08\u5f53\u7136\u5982\u679c\u80fd\u591f\u505a\u597d\u56de\u6eda\u4e0e\u914d\u7f6e\u597d\u6570\u636e\u5e93\u9694\u79bb\u7ea7\u522b\uff0c\u8fd9\u6761\u53ef\u4ee5\u5ffd\u7565\uff09<br \/> <img decoding=\"async\" src=\"https:\/\/img.mushiming.top\/app\/common_img\/1da03b08b2c443e8b433dd0bb1914e24.png\" =\"\" =\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" alt=\"redis\u7f13\u5b58\u4e3a\u4ec0\u4e48\u8981\u5ef6\u65f6\u53cc\u5220 (https:\/\/mushiming.com\/) \u6280\u672f\u535a\u5ba2 \u7b2c3\u5f20\" title=\"redis\u7f13\u5b58\u4e3a\u4ec0\u4e48\u8981\u5ef6\u65f6\u53cc\u5220 \u6280\u672f\u535a\u5ba2 \u7b2c3\u5f20-\u7a46\u4e16\u660e\u535a\u5ba2\" ><\/p>\n<h3>\u4e09\u3001\u666e\u901a\u53cc\u5220<\/h3>\n<p>\u95ee\u9898\uff1a\u7b2c\u4e00\u6b21\u6e05\u7a7a\u7f13\u5b58\u540e\u3001\u66f4\u65b0\u6570\u636e\u5e93\u524d\uff1a\u5176\u4ed6\u4e8b\u52a1\u67e5\u8be2\u4e86\u6570\u636e\u5e93hang\u4f4f<br \/> \u7b2c\u4e8c\u6b21\u6e05\u7a7a\u7f13\u5b58\u540e\uff1a\u5176\u4ed6\u4e8b\u52a1\u66f4\u65b0\u7f13\u5b58\uff0c\u6b64\u65f6\u53c8\u4f1a\u628a\u65e7\u6570\u636e\u66f4\u65b0\u5230\u7f13\u5b58<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/img.mushiming.top\/app\/common_img\/c968c486ec1e4cbaa324c053f911f3d3.png\" =\"\" =\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" alt=\"redis\u7f13\u5b58\u4e3a\u4ec0\u4e48\u8981\u5ef6\u65f6\u53cc\u5220 (https:\/\/mushiming.com\/) \u6280\u672f\u535a\u5ba2 \u7b2c4\u5f20\" title=\"redis\u7f13\u5b58\u4e3a\u4ec0\u4e48\u8981\u5ef6\u65f6\u53cc\u5220 \u6280\u672f\u535a\u5ba2 \u7b2c4\u5f20-\u7a46\u4e16\u660e\u535a\u5ba2\" ><\/p>\n<h3>\u56db\u3001\u4e3a\u4ec0\u4e48\u9700\u8981\u5ef6\u65f6\u53cc\u5220\uff1f<\/h3>\n<p>\u5728\u4e09\u4e2d\uff0c\u7b2c\u4e8c\u6b21\u6e05\u7a7a\u7f13\u5b58\u4e4b\u524d\uff0c\u591a\u5ef6\u65f6\u4e00\u4f1a\u513f\uff0c\u7b49B\u66f4\u65b0\u7f13\u5b58\u7ed3\u675f\u4e86\uff0c\u518d\u5220\u9664\u7f13\u5b58\uff0c\u8fd9\u6837\u5c31\u7f13\u5b58\u5c31\u4e0d\u5b58\u5728\u4e86\uff0c\u5176\u4ed6\u4e8b\u52a1\u67e5\u8be2\u5230\u7684\u4e3a\u65b0\u7f13\u5b58\u3002<\/p>\n<p>\u5ef6\u65f6\u662f\u786e\u4fdd <strong>\u4fee\u6539\u6570\u636e\u5e93 -> \u6e05\u7a7a\u7f13\u5b58\u524d\uff0c\u5176\u4ed6\u4e8b\u52a1\u7684\u66f4\u6539\u7f13\u5b58\u64cd\u4f5c\u5df2\u7ecf\u6267\u884c\u5b8c\u3002<\/strong><br \/> <img decoding=\"async\" src=\"https:\/\/img.mushiming.top\/app\/common_img\/76b0ac9002b24e7193f4941a06e65f9b.png\" =\"\" =\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" alt=\"redis\u7f13\u5b58\u4e3a\u4ec0\u4e48\u8981\u5ef6\u65f6\u53cc\u5220 (https:\/\/mushiming.com\/) \u6280\u672f\u535a\u5ba2 \u7b2c5\u5f20\" title=\"redis\u7f13\u5b58\u4e3a\u4ec0\u4e48\u8981\u5ef6\u65f6\u53cc\u5220 \u6280\u672f\u535a\u5ba2 \u7b2c5\u5f20-\u7a46\u4e16\u660e\u535a\u5ba2\" ><\/p>\n<h3>\u4e94\u3001\u4ee5\u4e0a\u7b56\u7565\u8fd8\u80fd\u4e0d\u80fd\u5b8c\u5584<\/h3>\n<p>\u56db\u4e2d\u8bf4\u5230\uff0c\u91c7\u7528\u5ef6\u65f6\u5220\u6700\u540e\u4e00\u6b21\u7f13\u5b58\uff0c\u4f46\u8fd9\u5176\u4e2d\u96be\u514d\u8fd8\u662f\u4f1a\u5927\u91cf\u7684\u67e5\u8be2\u5230\u65e7\u7f13\u5b58\u6570\u636e\u7684\u3002<br \/> <img decoding=\"async\" src=\"https:\/\/img.mushiming.top\/app\/common_img\/fcfe3f7aaa80482897007c64c89a3edf.png\" =\"\" =\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" alt=\"redis\u7f13\u5b58\u4e3a\u4ec0\u4e48\u8981\u5ef6\u65f6\u53cc\u5220 (https:\/\/mushiming.com\/) \u6280\u672f\u535a\u5ba2 \u7b2c6\u5f20\" title=\"redis\u7f13\u5b58\u4e3a\u4ec0\u4e48\u8981\u5ef6\u65f6\u53cc\u5220 \u6280\u672f\u535a\u5ba2 \u7b2c6\u5f20-\u7a46\u4e16\u660e\u535a\u5ba2\" ><br \/> \u8fd9\u65f6\u5019\u53ef\u4ee5\u901a\u8fc7\u52a0\u9501\u6765\u89e3\u51b3\uff0c\u4e00\u6b21\u6027\u4e0d\u8ba9\u592a\u591a\u7684\u7ebf\u7a0b\u90fd\u6765\u8bf7\u6c42\uff0c\u53e6\u5916\u4ece\u56fe\u4e0a\u770b\uff0c\u6211\u4eec\u53ef\u4ee5\u5c3d\u91cf\u7f29\u77ed<code>\u7b2c\u4e00\u6b21\u5220\u9664\u7f13\u5b58<\/code>\u548c<code>\u66f4\u65b0\u6570\u636e\u5e93<\/code>\u7684\u65f6\u95f4\u5dee\uff0c\u8fd9\u6837\u53ef\u4ee5\u4f7f\u5f97\u5176\u4ed6\u4e8b\u52a1\u7b2c\u4e00\u65f6\u95f4\u83b7\u53d6\u5230\u66f4\u65b0\u6570\u636e\u5e93\u540e\u7684\u6570\u636e\u3002\u53e6\u5916\uff0c\u8be5\u65b9\u5f0f\uff08\u7b2c5\u79cd\uff0c\u76f8\u5bf9\u7b2c2\u79cd\uff0c\u53ea\u540e\u5220\u7f13\u5b58\u7684\uff0c\u53ef\u4ee5\u5927\u5927\u7684\u51cf\u5c11\u83b7\u53d6\u5230\u65e7\u7f13\u5b58\u7684\u6570\u91cf\uff09<\/p>\n<p>\u53ef\u4ee5\u53c2\u8003\uff1a\u7f13\u5b58\u5904\u7406\u6d41\u7a0b<\/p>\n<p>\u53c2\u8003redis\u7f13\u5b58\u4e3a\u4ec0\u4e48\u8981\u5ef6\u65f6\u53cc\u5220<\/p>\n<p>\u66f4\u7ec6\u7c92\u5ea6\u7684\uff08Key\u7ea7\u522b\uff09\u4e92\u65a5\u9501<\/p>\n<p>\u5206\u6bb5\u9501\u4f7f\u7528\u6ce8\u610f\u4e8b\u9879<\/p>\n<h3>\u5206\u6bb5\u9501<\/h3>\n<pre><code class=\"prism language-java\"><span class=\"token comment\">\/** * * @Explain: key\u9501\uff08\u8981\u4fdd\u8bc1key\u7684hashCode\u4e0d\u53d8,\u5426\u5219\u65e0\u6cd5\u91ca\u653e\u9501\u3002\u5373\u52a0\u9501\u4e4b\u540e\u4e0d\u8981\u624b\u52a8\u66f4\u6539lockMap\uff09 *\/<\/span>\n<span class=\"token annotation punctuation\">@Component<\/span>\n<span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">LoadKeyLock<\/span><span class=\"token generics\"><span class=\"token punctuation\"><<\/span><span class=\"token class-name\">T<\/span><span class=\"token punctuation\">><\/span><\/span> <span class=\"token punctuation\">{ \n <!-- --><\/span>\n <span class=\"token comment\">\/\/\u9ed8\u8ba4\u5206\u6bb5\u6570\u91cf<\/span>\n <span class=\"token keyword\">private<\/span> <span class=\"token class-name\">Integer<\/span> segments <span class=\"token operator\">=<\/span> <span class=\"token number\">16<\/span><span class=\"token punctuation\">;<\/span>\n <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">final<\/span> <span class=\"token class-name\">HashMap<\/span><span class=\"token generics\"><span class=\"token punctuation\"><<\/span><span class=\"token class-name\">Integer<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">ReentrantLock<\/span><span class=\"token punctuation\">><\/span><\/span> lockMap <span class=\"token operator\">=<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">HashMap<\/span><span class=\"token generics\"><span class=\"token punctuation\"><<\/span><span class=\"token punctuation\">><\/span><\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n <span class=\"token keyword\">public<\/span> <span class=\"token class-name\">LoadKeyLock<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{ \n <!-- --><\/span>\n <span class=\"token function\">init<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">null<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token boolean\">false<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n <span class=\"token punctuation\">}<\/span>\n <span class=\"token keyword\">public<\/span> <span class=\"token class-name\">LoadKeyLock<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">Integer<\/span> counts<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">boolean<\/span> fair<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{ \n <!-- --><\/span>\n <span class=\"token function\">init<\/span><span class=\"token punctuation\">(<\/span>counts<span class=\"token punctuation\">,<\/span> fair<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n <span class=\"token punctuation\">}<\/span>\n <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">init<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">Integer<\/span> counts<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">boolean<\/span> fair<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{ \n <!-- --><\/span>\n <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>counts <span class=\"token operator\">!=<\/span> <span class=\"token keyword\">null<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{ \n <!-- --><\/span>\n segments <span class=\"token operator\">=<\/span> counts<span class=\"token punctuation\">;<\/span>\n <span class=\"token punctuation\">}<\/span>\n <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> i <span class=\"token operator\">=<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> i <span class=\"token operator\"><<\/span> segments<span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">++<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{ \n <!-- --><\/span>\n lockMap<span class=\"token punctuation\">.<\/span><span class=\"token function\">put<\/span><span class=\"token punctuation\">(<\/span>i<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">ReentrantLock<\/span><span class=\"token punctuation\">(<\/span>fair<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n <span class=\"token punctuation\">}<\/span>\n <span class=\"token punctuation\">}<\/span>\n <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">lock<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">T<\/span> key<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{ \n <!-- --><\/span>\n <span class=\"token class-name\">ReentrantLock<\/span> lock <span class=\"token operator\">=<\/span> lockMap<span class=\"token punctuation\">.<\/span><span class=\"token function\">get<\/span><span class=\"token punctuation\">(<\/span>key<span class=\"token punctuation\">.<\/span><span class=\"token function\">hashCode<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">%<\/span> segments<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n lock<span class=\"token punctuation\">.<\/span><span class=\"token function\">lock<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n <span class=\"token punctuation\">}<\/span>\n <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">unlock<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">T<\/span> key<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{ \n <!-- --><\/span>\n <span class=\"token class-name\">ReentrantLock<\/span> lock <span class=\"token operator\">=<\/span> lockMap<span class=\"token punctuation\">.<\/span><span class=\"token function\">get<\/span><span class=\"token punctuation\">(<\/span>key<span class=\"token punctuation\">.<\/span><span class=\"token function\">hashCode<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">%<\/span> segments<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n lock<span class=\"token punctuation\">.<\/span><span class=\"token function\">unlock<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n <span class=\"token punctuation\">}<\/span>\n<span class=\"token punctuation\">}<\/span>\n<\/code><\/pre>\n<h3>\u54c8\u5e0c\u9501<\/h3>\n<p>\u5206\u6bb5\u9501\u7684\u57fa\u7840\u4e0a\u53d1\u5c55\u8d77\u6765\u7684\u7b2c\u4e8c\u79cd\u9501\u7b56\u7565\uff0c\u76ee\u7684\u662f\u5b9e\u73b0\u771f\u6b63\u610f\u4e49\u4e0a\u7684\u7ec6\u7c92\u5ea6\u9501\u3002\u6bcf\u4e2a\u54c8\u5e0c\u503c\u4e0d\u540c\u7684\u5bf9\u8c61\u90fd\u80fd\u83b7\u5f97\u81ea\u5df1\u72ec\u7acb\u7684\u9501\u3002<\/p>\n<pre><code class=\"prism language-java\"><span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">HashLock<\/span><span class=\"token generics\"><span class=\"token punctuation\"><<\/span><span class=\"token class-name\">T<\/span><span class=\"token punctuation\">><\/span><\/span> <span class=\"token punctuation\">{ \n <!-- --><\/span>\n <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">boolean<\/span> isFair <span class=\"token operator\">=<\/span> <span class=\"token boolean\">false<\/span><span class=\"token punctuation\">;<\/span>\n <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">final<\/span> <span class=\"token class-name\">SegmentLock<\/span><span class=\"token generics\"><span class=\"token punctuation\"><<\/span><span class=\"token class-name\">T<\/span><span class=\"token punctuation\">><\/span><\/span> segmentLock <span class=\"token operator\">=<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">SegmentLock<\/span><span class=\"token generics\"><span class=\"token punctuation\"><<\/span><span class=\"token punctuation\">><\/span><\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/\u5206\u6bb5\u9501<\/span>\n <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">final<\/span> <span class=\"token class-name\">ConcurrentHashMap<\/span><span class=\"token generics\"><span class=\"token punctuation\"><<\/span><span class=\"token class-name\">T<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">LockInfo<\/span><span class=\"token punctuation\">><\/span><\/span> lockMap <span class=\"token operator\">=<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">ConcurrentHashMap<\/span><span class=\"token generics\"><span class=\"token punctuation\"><<\/span><span class=\"token punctuation\">><\/span><\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n\n <span class=\"token keyword\">public<\/span> <span class=\"token class-name\">HashLock<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{ \n <!-- --><\/span>\n <span class=\"token punctuation\">}<\/span>\n\n <span class=\"token keyword\">public<\/span> <span class=\"token class-name\">HashLock<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">boolean<\/span> fair<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{ \n <!-- --><\/span>\n isFair <span class=\"token operator\">=<\/span> fair<span class=\"token punctuation\">;<\/span>\n <span class=\"token punctuation\">}<\/span>\n\n <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">lock<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">T<\/span> key<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{ \n <!-- --><\/span>\n <span class=\"token class-name\">LockInfo<\/span> lockInfo<span class=\"token punctuation\">;<\/span>\n segmentLock<span class=\"token punctuation\">.<\/span><span class=\"token function\">lock<\/span><span class=\"token punctuation\">(<\/span>key<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n <span class=\"token keyword\">try<\/span> <span class=\"token punctuation\">{ \n <!-- --><\/span>\n lockInfo <span class=\"token operator\">=<\/span> lockMap<span class=\"token punctuation\">.<\/span><span class=\"token function\">get<\/span><span class=\"token punctuation\">(<\/span>key<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>lockInfo <span class=\"token operator\">==<\/span> <span class=\"token keyword\">null<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{ \n <!-- --><\/span>\n lockInfo <span class=\"token operator\">=<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">LockInfo<\/span><span class=\"token punctuation\">(<\/span>isFair<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n lockMap<span class=\"token punctuation\">.<\/span><span class=\"token function\">put<\/span><span class=\"token punctuation\">(<\/span>key<span class=\"token punctuation\">,<\/span> lockInfo<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n <span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">else<\/span> <span class=\"token punctuation\">{ \n <!-- --><\/span>\n lockInfo<span class=\"token punctuation\">.<\/span>count<span class=\"token punctuation\">.<\/span><span class=\"token function\">incrementAndGet<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n <span class=\"token punctuation\">}<\/span>\n <span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">finally<\/span> <span class=\"token punctuation\">{ \n <!-- --><\/span>\n segmentLock<span class=\"token punctuation\">.<\/span><span class=\"token function\">unlock<\/span><span class=\"token punctuation\">(<\/span>key<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n <span class=\"token punctuation\">}<\/span>\n lockInfo<span class=\"token punctuation\">.<\/span>lock<span class=\"token punctuation\">.<\/span><span class=\"token function\">lock<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n <span class=\"token punctuation\">}<\/span>\n\n <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">unlock<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">T<\/span> key<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{ \n <!-- --><\/span>\n <span class=\"token class-name\">LockInfo<\/span> lockInfo <span class=\"token operator\">=<\/span> lockMap<span class=\"token punctuation\">.<\/span><span class=\"token function\">get<\/span><span class=\"token punctuation\">(<\/span>key<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>lockInfo<span class=\"token punctuation\">.<\/span>count<span class=\"token punctuation\">.<\/span><span class=\"token function\">get<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">==<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{ \n <!-- --><\/span>\n segmentLock<span class=\"token punctuation\">.<\/span><span class=\"token function\">lock<\/span><span class=\"token punctuation\">(<\/span>key<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n <span class=\"token keyword\">try<\/span> <span class=\"token punctuation\">{ \n <!-- --><\/span>\n <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>lockInfo<span class=\"token punctuation\">.<\/span>count<span class=\"token punctuation\">.<\/span><span class=\"token function\">get<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">==<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{ \n <!-- --><\/span>\n lockMap<span class=\"token punctuation\">.<\/span><span class=\"token function\">remove<\/span><span class=\"token punctuation\">(<\/span>key<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n <span class=\"token punctuation\">}<\/span>\n <span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">finally<\/span> <span class=\"token punctuation\">{ \n <!-- --><\/span>\n segmentLock<span class=\"token punctuation\">.<\/span><span class=\"token function\">unlock<\/span><span class=\"token punctuation\">(<\/span>key<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n <span class=\"token punctuation\">}<\/span>\n <span class=\"token punctuation\">}<\/span>\n lockInfo<span class=\"token punctuation\">.<\/span>count<span class=\"token punctuation\">.<\/span><span class=\"token function\">decrementAndGet<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n lockInfo<span class=\"token punctuation\">.<\/span><span class=\"token function\">unlock<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n <span class=\"token punctuation\">}<\/span>\n\n <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">LockInfo<\/span> <span class=\"token punctuation\">{ \n <!-- --><\/span>\n <span class=\"token keyword\">public<\/span> <span class=\"token class-name\">ReentrantLock<\/span> lock<span class=\"token punctuation\">;<\/span>\n <span class=\"token keyword\">public<\/span> <span class=\"token class-name\">AtomicInteger<\/span> count <span class=\"token operator\">=<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">AtomicInteger<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n\n <span class=\"token keyword\">private<\/span> <span class=\"token class-name\">LockInfo<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">boolean<\/span> fair<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{ \n <!-- --><\/span>\n <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>lock <span class=\"token operator\">=<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">ReentrantLock<\/span><span class=\"token punctuation\">(<\/span>fair<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n <span class=\"token punctuation\">}<\/span>\n\n <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">lock<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{ \n <!-- --><\/span>\n <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>lock<span class=\"token punctuation\">.<\/span><span class=\"token function\">lock<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n <span class=\"token punctuation\">}<\/span>\n\n <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">unlock<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{ \n <!-- --><\/span>\n <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>lock<span class=\"token punctuation\">.<\/span><span class=\"token function\">unlock<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n <span class=\"token punctuation\">}<\/span>\n <span class=\"token punctuation\">}<\/span>\n<span class=\"token punctuation\">}<\/span>\n<\/code><\/pre>\n<h3>\u5f31\u5f15\u7528\u9501<\/h3>\n<p>\u54c8\u5e0c\u9501\u56e0\u4e3a\u5f15\u5165\u7684\u5206\u6bb5\u9501\u6765\u4fdd\u8bc1\u9501\u521b\u5efa\u548c\u9500\u6bc1\u7684\u540c\u6b65\uff0c\u8fd9\u4e2a\u9501\u7684\u601d\u60f3\u662f\u501f\u52a9java\u7684\u5f31\u5f15\u7528\u6765\u521b\u5efa\u9501\uff0c\u628a\u9501\u7684\u9500\u6bc1\u4ea4\u7ed9jvm\u7684\u5783\u573e\u56de\u6536\uff0c\u6765\u907f\u514d\u989d\u5916\u7684\u6d88\u8017\u3002<\/p>\n<pre><code class=\"prism language-java\"><span class=\"token comment\">\/** * \u5f31\u5f15\u7528\u9501\uff0c\u4e3a\u6bcf\u4e2a\u72ec\u7acb\u7684\u54c8\u5e0c\u503c\u63d0\u4f9b\u72ec\u7acb\u7684\u9501\u529f\u80fd *\/<\/span>\n<span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">WeakHashLock<\/span><span class=\"token generics\"><span class=\"token punctuation\"><<\/span><span class=\"token class-name\">T<\/span><span class=\"token punctuation\">><\/span><\/span> <span class=\"token punctuation\">{ \n <!-- --><\/span>\n <span class=\"token keyword\">private<\/span> <span class=\"token class-name\">ConcurrentHashMap<\/span><span class=\"token generics\"><span class=\"token punctuation\"><<\/span><span class=\"token class-name\">T<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">WeakLockRef<\/span><span class=\"token punctuation\"><<\/span><span class=\"token class-name\">T<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">ReentrantLock<\/span><span class=\"token punctuation\">><\/span><span class=\"token punctuation\">><\/span><\/span> lockMap <span class=\"token operator\">=<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">ConcurrentHashMap<\/span><span class=\"token generics\"><span class=\"token punctuation\"><<\/span><span class=\"token punctuation\">><\/span><\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n <span class=\"token keyword\">private<\/span> <span class=\"token class-name\">ReferenceQueue<\/span><span class=\"token generics\"><span class=\"token punctuation\"><<\/span><span class=\"token class-name\">ReentrantLock<\/span><span class=\"token punctuation\">><\/span><\/span> queue <span class=\"token operator\">=<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">ReferenceQueue<\/span><span class=\"token generics\"><span class=\"token punctuation\"><<\/span><span class=\"token punctuation\">><\/span><\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n\n <span class=\"token keyword\">public<\/span> <span class=\"token class-name\">ReentrantLock<\/span> <span class=\"token function\">get<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">T<\/span> key<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{ \n <!-- --><\/span>\n <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>lockMap<span class=\"token punctuation\">.<\/span><span class=\"token function\">size<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">><\/span> <span class=\"token number\">1000<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{ \n <!-- --><\/span>\n <span class=\"token function\">clearEmptyRef<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n <span class=\"token punctuation\">}<\/span>\n <span class=\"token class-name\">WeakReference<\/span><span class=\"token generics\"><span class=\"token punctuation\"><<\/span><span class=\"token class-name\">ReentrantLock<\/span><span class=\"token punctuation\">><\/span><\/span> lockRef <span class=\"token operator\">=<\/span> lockMap<span class=\"token punctuation\">.<\/span><span class=\"token function\">get<\/span><span class=\"token punctuation\">(<\/span>key<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n <span class=\"token class-name\">ReentrantLock<\/span> lock <span class=\"token operator\">=<\/span> <span class=\"token punctuation\">(<\/span>lockRef <span class=\"token operator\">==<\/span> <span class=\"token keyword\">null<\/span> <span class=\"token operator\">?<\/span> <span class=\"token keyword\">null<\/span> <span class=\"token operator\">:<\/span> lockRef<span class=\"token punctuation\">.<\/span><span class=\"token function\">get<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n <span class=\"token keyword\">while<\/span> <span class=\"token punctuation\">(<\/span>lock <span class=\"token operator\">==<\/span> <span class=\"token keyword\">null<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{ \n <!-- --><\/span>\n lockMap<span class=\"token punctuation\">.<\/span><span class=\"token function\">putIfAbsent<\/span><span class=\"token punctuation\">(<\/span>key<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">WeakLockRef<\/span><span class=\"token generics\"><span class=\"token punctuation\"><<\/span><span class=\"token punctuation\">><\/span><\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">new<\/span> <span class=\"token class-name\">ReentrantLock<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> queue<span class=\"token punctuation\">,<\/span> key<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n lockRef <span class=\"token operator\">=<\/span> lockMap<span class=\"token punctuation\">.<\/span><span class=\"token function\">get<\/span><span class=\"token punctuation\">(<\/span>key<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n lock <span class=\"token operator\">=<\/span> <span class=\"token punctuation\">(<\/span>lockRef <span class=\"token operator\">==<\/span> <span class=\"token keyword\">null<\/span> <span class=\"token operator\">?<\/span> <span class=\"token keyword\">null<\/span> <span class=\"token operator\">:<\/span> lockRef<span class=\"token punctuation\">.<\/span><span class=\"token function\">get<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>lock <span class=\"token operator\">!=<\/span> <span class=\"token keyword\">null<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{ \n <!-- --><\/span>\n <span class=\"token keyword\">return<\/span> lock<span class=\"token punctuation\">;<\/span>\n <span class=\"token punctuation\">}<\/span>\n <span class=\"token function\">clearEmptyRef<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n <span class=\"token punctuation\">}<\/span>\n <span class=\"token keyword\">return<\/span> lock<span class=\"token punctuation\">;<\/span>\n <span class=\"token punctuation\">}<\/span>\n\n <span class=\"token annotation punctuation\">@SuppressWarnings<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\"unchecked\"<\/span><span class=\"token punctuation\">)<\/span>\n <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">clearEmptyRef<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{ \n <!-- --><\/span>\n <span class=\"token class-name\">Reference<\/span><span class=\"token generics\"><span class=\"token punctuation\"><<\/span><span class=\"token operator\">?<\/span> <span class=\"token keyword\">extends<\/span> <span class=\"token class-name\">ReentrantLock<\/span><span class=\"token punctuation\">><\/span><\/span> ref<span class=\"token punctuation\">;<\/span>\n <span class=\"token keyword\">while<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">(<\/span>ref <span class=\"token operator\">=<\/span> queue<span class=\"token punctuation\">.<\/span><span class=\"token function\">poll<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">!=<\/span> <span class=\"token keyword\">null<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{ \n <!-- --><\/span>\n <span class=\"token class-name\">WeakLockRef<\/span><span class=\"token generics\"><span class=\"token punctuation\"><<\/span><span class=\"token class-name\">T<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token operator\">?<\/span> <span class=\"token keyword\">extends<\/span> <span class=\"token class-name\">ReentrantLock<\/span><span class=\"token punctuation\">><\/span><\/span> weakLockRef <span class=\"token operator\">=<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token class-name\">WeakLockRef<\/span><span class=\"token generics\"><span class=\"token punctuation\"><<\/span><span class=\"token class-name\">T<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token operator\">?<\/span> <span class=\"token keyword\">extends<\/span> <span class=\"token class-name\">ReentrantLock<\/span><span class=\"token punctuation\">><\/span><\/span><span class=\"token punctuation\">)<\/span> ref<span class=\"token punctuation\">;<\/span>\n lockMap<span class=\"token punctuation\">.<\/span><span class=\"token function\">remove<\/span><span class=\"token punctuation\">(<\/span>weakLockRef<span class=\"token punctuation\">.<\/span>key<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n <span class=\"token punctuation\">}<\/span>\n <span class=\"token punctuation\">}<\/span>\n\n <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">final<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">WeakLockRef<\/span><span class=\"token generics\"><span class=\"token punctuation\"><<\/span><span class=\"token class-name\">T<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">K<\/span><span class=\"token punctuation\">><\/span><\/span> <span class=\"token keyword\">extends<\/span> <span class=\"token class-name\">WeakReference<\/span><span class=\"token generics\"><span class=\"token punctuation\"><<\/span><span class=\"token class-name\">K<\/span><span class=\"token punctuation\">><\/span><\/span> <span class=\"token punctuation\">{ \n <!-- --><\/span>\n <span class=\"token keyword\">final<\/span> <span class=\"token class-name\">T<\/span> key<span class=\"token punctuation\">;<\/span>\n\n <span class=\"token keyword\">private<\/span> <span class=\"token class-name\">WeakLockRef<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">K<\/span> referent<span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">ReferenceQueue<\/span><span class=\"token generics\"><span class=\"token punctuation\"><<\/span><span class=\"token operator\">?<\/span> <span class=\"token keyword\">super<\/span> <span class=\"token class-name\">K<\/span><span class=\"token punctuation\">><\/span><\/span> q<span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">T<\/span> key<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{ \n <!-- --><\/span>\n <span class=\"token keyword\">super<\/span><span class=\"token punctuation\">(<\/span>referent<span class=\"token punctuation\">,<\/span> q<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>key <span class=\"token operator\">=<\/span> key<span class=\"token punctuation\">;<\/span>\n <span class=\"token punctuation\">}<\/span>\n <span class=\"token punctuation\">}<\/span>\n<span class=\"token punctuation\">}<\/span>\n<\/code><\/pre>\n<h3>\u9002\u5408\u8017\u65f6\u957f\u573a\u666f\u7684\u4e92\u65a5key\u9501<\/h3>\n<p>\u4e00\u4e2a\u7ec6\u7c92\u5ea6\u7684\u9501\uff0c\u5728\u67d0\u4e9b\u573a\u666f\u80fd\u6bd4synchronized\uff0cReentrantLock\u7b49\u83b7\u5f97\u66f4\u9ad8\u7684\u5e76\u884c\u5ea6\u66f4\u597d\u7684\u6027\u80fd<\/p>\n<pre><code class=\"prism language-java\"><span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">KeyLock<\/span><span class=\"token generics\"><span class=\"token punctuation\"><<\/span><span class=\"token class-name\">K<\/span><span class=\"token punctuation\">><\/span><\/span> <span class=\"token punctuation\">{ \n <!-- --><\/span>\n <span class=\"token comment\">\/\/ \u4fdd\u5b58\u6240\u6709\u9501\u5b9a\u7684KEY\u53ca\u5176\u4fe1\u53f7\u91cf<\/span>\n <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">final<\/span> <span class=\"token class-name\">ConcurrentMap<\/span><span class=\"token generics\"><span class=\"token punctuation\"><<\/span><span class=\"token class-name\">K<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">Semaphore<\/span><span class=\"token punctuation\">><\/span><\/span> map <span class=\"token operator\">=<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">ConcurrentHashMap<\/span><span class=\"token generics\"><span class=\"token punctuation\"><<\/span><span class=\"token class-name\">K<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">Semaphore<\/span><span class=\"token punctuation\">><\/span><\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n <span class=\"token comment\">\/\/ \u4fdd\u5b58\u6bcf\u4e2a\u7ebf\u7a0b\u9501\u5b9a\u7684KEY\u53ca\u5176\u9501\u5b9a\u8ba1\u6570<\/span>\n <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">final<\/span> <span class=\"token class-name\">ThreadLocal<\/span><span class=\"token generics\"><span class=\"token punctuation\"><<\/span><span class=\"token class-name\">Map<\/span><span class=\"token punctuation\"><<\/span><span class=\"token class-name\">K<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">LockInfo<\/span><span class=\"token punctuation\">><\/span><span class=\"token punctuation\">><\/span><\/span> local <span class=\"token operator\">=<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">ThreadLocal<\/span><span class=\"token generics\"><span class=\"token punctuation\"><<\/span><span class=\"token class-name\">Map<\/span><span class=\"token punctuation\"><<\/span><span class=\"token class-name\">K<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">LockInfo<\/span><span class=\"token punctuation\">><\/span><span class=\"token punctuation\">><\/span><\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{ \n <!-- --><\/span>\n <span class=\"token annotation punctuation\">@Override<\/span>\n <span class=\"token keyword\">protected<\/span> <span class=\"token class-name\">Map<\/span><span class=\"token generics\"><span class=\"token punctuation\"><<\/span><span class=\"token class-name\">K<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">LockInfo<\/span><span class=\"token punctuation\">><\/span><\/span> <span class=\"token function\">initialValue<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{ \n <!-- --><\/span>\n <span class=\"token keyword\">return<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">HashMap<\/span><span class=\"token generics\"><span class=\"token punctuation\"><<\/span><span class=\"token class-name\">K<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">LockInfo<\/span><span class=\"token punctuation\">><\/span><\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n <span class=\"token punctuation\">}<\/span>\n <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span>\n\n <span class=\"token comment\">\/** * \u9501\u5b9akey\uff0c\u5176\u4ed6\u7b49\u5f85\u6b64key\u7684\u7ebf\u7a0b\u5c06\u8fdb\u5165\u7b49\u5f85\uff0c\u76f4\u5230\u8c03\u7528{@link #unlock(K)} * \u4f7f\u7528hashcode\u548cequals\u6765\u5224\u65adkey\u662f\u5426\u76f8\u540c\uff0c\u56e0\u6b64key\u5fc5\u987b\u5b9e\u73b0{@link #hashCode()}\u548c * {@link #equals(Object)}\u65b9\u6cd5 * * @param key *\/<\/span>\n <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">lock<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">K<\/span> key<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{ \n <!-- --><\/span>\n <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>key <span class=\"token operator\">==<\/span> <span class=\"token keyword\">null<\/span><span class=\"token punctuation\">)<\/span>\n <span class=\"token keyword\">return<\/span><span class=\"token punctuation\">;<\/span>\n <span class=\"token class-name\">LockInfo<\/span> info <span class=\"token operator\">=<\/span> local<span class=\"token punctuation\">.<\/span><span class=\"token function\">get<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">get<\/span><span class=\"token punctuation\">(<\/span>key<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>info <span class=\"token operator\">==<\/span> <span class=\"token keyword\">null<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{ \n <!-- --><\/span>\n <span class=\"token class-name\">Semaphore<\/span> current <span class=\"token operator\">=<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">Semaphore<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n current<span class=\"token punctuation\">.<\/span><span class=\"token function\">acquireUninterruptibly<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n <span class=\"token class-name\">Semaphore<\/span> previous <span class=\"token operator\">=<\/span> map<span class=\"token punctuation\">.<\/span><span class=\"token function\">put<\/span><span class=\"token punctuation\">(<\/span>key<span class=\"token punctuation\">,<\/span> current<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>previous <span class=\"token operator\">!=<\/span> <span class=\"token keyword\">null<\/span><span class=\"token punctuation\">)<\/span>\n previous<span class=\"token punctuation\">.<\/span><span class=\"token function\">acquireUninterruptibly<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n local<span class=\"token punctuation\">.<\/span><span class=\"token function\">get<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">put<\/span><span class=\"token punctuation\">(<\/span>key<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">LockInfo<\/span><span class=\"token punctuation\">(<\/span>current<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n <span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">else<\/span> <span class=\"token punctuation\">{ \n <!-- --><\/span>\n info<span class=\"token punctuation\">.<\/span>lockCount<span class=\"token operator\">++<\/span><span class=\"token punctuation\">;<\/span>\n <span class=\"token punctuation\">}<\/span>\n <span class=\"token punctuation\">}<\/span>\n <span class=\"token comment\">\/** * \u91ca\u653ekey\uff0c\u5524\u9192\u5176\u4ed6\u7b49\u5f85\u6b64key\u7684\u7ebf\u7a0b * @param key *\/<\/span>\n <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">unlock<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">K<\/span> key<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{ \n <!-- --><\/span>\n <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>key <span class=\"token operator\">==<\/span> <span class=\"token keyword\">null<\/span><span class=\"token punctuation\">)<\/span>\n <span class=\"token keyword\">return<\/span><span class=\"token punctuation\">;<\/span>\n <span class=\"token class-name\">LockInfo<\/span> info <span class=\"token operator\">=<\/span> local<span class=\"token punctuation\">.<\/span><span class=\"token function\">get<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">get<\/span><span class=\"token punctuation\">(<\/span>key<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>info <span class=\"token operator\">!=<\/span> <span class=\"token keyword\">null<\/span> <span class=\"token operator\">&&<\/span> <span class=\"token operator\">--<\/span>info<span class=\"token punctuation\">.<\/span>lockCount <span class=\"token operator\">==<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{ \n <!-- --><\/span>\n info<span class=\"token punctuation\">.<\/span>current<span class=\"token punctuation\">.<\/span><span class=\"token function\">release<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n map<span class=\"token punctuation\">.<\/span><span class=\"token function\">remove<\/span><span class=\"token punctuation\">(<\/span>key<span class=\"token punctuation\">,<\/span> info<span class=\"token punctuation\">.<\/span>current<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n local<span class=\"token punctuation\">.<\/span><span class=\"token function\">get<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">remove<\/span><span class=\"token punctuation\">(<\/span>key<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n <span class=\"token punctuation\">}<\/span>\n <span class=\"token punctuation\">}<\/span>\n \n <span class=\"token comment\">\/** * \u9501\u5b9a\u591a\u4e2akey * \u5efa\u8bae\u5728\u8c03\u7528\u6b64\u65b9\u6cd5\u524d\u5148\u5bf9keys\u8fdb\u884c\u6392\u5e8f\uff0c\u4f7f\u7528\u76f8\u540c\u7684\u9501\u5b9a\u987a\u5e8f\uff0c\u9632\u6b62\u6b7b\u9501\u53d1\u751f * @param keys *\/<\/span>\n <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">lock<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">K<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> keys<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{ \n <!-- --><\/span>\n <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>keys <span class=\"token operator\">==<\/span> <span class=\"token keyword\">null<\/span><span class=\"token punctuation\">)<\/span>\n <span class=\"token keyword\">return<\/span><span class=\"token punctuation\">;<\/span>\n <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token class-name\">K<\/span> key <span class=\"token operator\">:<\/span> keys<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{ \n <!-- --><\/span>\n <span class=\"token function\">lock<\/span><span class=\"token punctuation\">(<\/span>key<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n <span class=\"token punctuation\">}<\/span>\n <span class=\"token punctuation\">}<\/span>\n\n <span class=\"token comment\">\/** * \u91ca\u653e\u591a\u4e2akey * @param keys *\/<\/span>\n <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">unlock<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">K<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> keys<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{ \n <!-- --><\/span>\n <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>keys <span class=\"token operator\">==<\/span> <span class=\"token keyword\">null<\/span><span class=\"token punctuation\">)<\/span>\n <span class=\"token keyword\">return<\/span><span class=\"token punctuation\">;<\/span>\n <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token class-name\">K<\/span> key <span class=\"token operator\">:<\/span> keys<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{ \n <!-- --><\/span>\n <span class=\"token function\">unlock<\/span><span class=\"token punctuation\">(<\/span>key<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n <span class=\"token punctuation\">}<\/span>\n <span class=\"token punctuation\">}<\/span>\n\n <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">LockInfo<\/span> <span class=\"token punctuation\">{ \n <!-- --><\/span>\n <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">final<\/span> <span class=\"token class-name\">Semaphore<\/span> current<span class=\"token punctuation\">;<\/span>\n <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">int<\/span> lockCount<span class=\"token punctuation\">;<\/span>\n\n <span class=\"token keyword\">private<\/span> <span class=\"token class-name\">LockInfo<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">Semaphore<\/span> current<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{ \n <!-- --><\/span>\n <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>current <span class=\"token operator\">=<\/span> current<span class=\"token punctuation\">;<\/span>\n <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>lockCount <span class=\"token operator\">=<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span>\n <span class=\"token punctuation\">}<\/span>\n <span class=\"token punctuation\">}<\/span>\n<\/code><\/pre>\n<p>\u8fd9\u91cc\u518d\u63a8\u8350\u4e00\u7bc7\uff1a\u7f13\u5b58\u5904\u7406\u6d41\u7a0b<\/p>\n","protected":false},"excerpt":{"rendered":"redis\u7f13\u5b58\u4e3a\u4ec0\u4e48\u8981\u5ef6\u65f6\u53cc\u5220redis\u7f13\u5b58\u4e3a\u4ec0\u4e48\u8981\u5ef6\u65f6\u53cc\u5220_\u5ef6\u8fdf\u53cc\u5220\u4e3a\u4ec0\u4e48\u8981\u5ef6\u8fdf","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[82],"tags":[],"_links":{"self":[{"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/posts\/648"}],"collection":[{"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/comments?post=648"}],"version-history":[{"count":0,"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/posts\/648\/revisions"}],"wp:attachment":[{"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/media?parent=648"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/categories?post=648"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/tags?post=648"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}