| 提交 | 用户 | 时间 | ||
| e7c126 | 1 | package com.xxl.job.admin.core.util; |
| H | 2 | |
| 3 | import java.util.concurrent.ConcurrentHashMap; | |
| 4 | import java.util.concurrent.ConcurrentMap; | |
| 5 | ||
| 6 | /** | |
| 7 | * local cache tool | |
| 8 | * | |
| 9 | * @author xuxueli 2018-01-22 21:37:34 | |
| 10 | */ | |
| 11 | public class LocalCacheUtil { | |
| 12 | ||
| 13 | private static ConcurrentMap<String, LocalCacheData> cacheRepository = new ConcurrentHashMap<String, LocalCacheData>(); // 类型建议用抽象父类，兼容性更好； | |
| 14 | private static class LocalCacheData{ | |
| 15 | private String key; | |
| 16 | private Object val; | |
| 17 | private long timeoutTime; | |
| 18 | ||
| 19 | public LocalCacheData() { | |
| 20 | } | |
| 21 | ||
| 22 | public LocalCacheData(String key, Object val, long timeoutTime) { | |
| 23 | this.key = key; | |
| 24 | this.val = val; | |
| 25 | this.timeoutTime = timeoutTime; | |
| 26 | } | |
| 27 | ||
| 28 | public String getKey() { | |
| 29 | return key; | |
| 30 | } | |
| 31 | ||
| 32 | public void setKey(String key) { | |
| 33 | this.key = key; | |
| 34 | } | |
| 35 | ||
| 36 | public Object getVal() { | |
| 37 | return val; | |
| 38 | } | |
| 39 | ||
| 40 | public void setVal(Object val) { | |
| 41 | this.val = val; | |
| 42 | } | |
| 43 | ||
| 44 | public long getTimeoutTime() { | |
| 45 | return timeoutTime; | |
| 46 | } | |
| 47 | ||
| 48 | public void setTimeoutTime(long timeoutTime) { | |
| 49 | this.timeoutTime = timeoutTime; | |
| 50 | } | |
| 51 | } | |
| 52 | ||
| 53 | ||
| 54 | /** | |
| 55 | * set cache | |
| 56 | * | |
| 57 | * @param key | |
| 58 | * @param val | |
| 59 | * @param cacheTime | |
| 60 | * @return | |
| 61 | */ | |
| 62 | public static boolean set(String key, Object val, long cacheTime){ | |
| 63 | ||
| 64 | // clean timeout cache, before set new cache (avoid cache too much) | |
| 65 | cleanTimeoutCache(); | |
| 66 | ||
| 67 | // set new cache | |
| 68 | if (key==null || key.trim().length()==0) { | |
| 69 | return false; | |
| 70 | } | |
| 71 | if (val == null) { | |
| 72 | remove(key); | |
| 73 | } | |
| 74 | if (cacheTime <= 0) { | |
| 75 | remove(key); | |
| 76 | } | |
| 77 | long timeoutTime = System.currentTimeMillis() + cacheTime; | |
| 78 | LocalCacheData localCacheData = new LocalCacheData(key, val, timeoutTime); | |
| 79 | cacheRepository.put(localCacheData.getKey(), localCacheData); | |
| 80 | return true; | |
| 81 | } | |
| 82 | ||
| 83 | /** | |
| 84 | * remove cache | |
| 85 | * | |
| 86 | * @param key | |
| 87 | * @return | |
| 88 | */ | |
| 89 | public static boolean remove(String key){ | |
| 90 | if (key==null || key.trim().length()==0) { | |
| 91 | return false; | |
| 92 | } | |
| 93 | cacheRepository.remove(key); | |
| 94 | return true; | |
| 95 | } | |
| 96 | ||
| 97 | /** | |
| 98 | * get cache | |
| 99 | * | |
| 100 | * @param key | |
| 101 | * @return | |
| 102 | */ | |
| 103 | public static Object get(String key){ | |
| 104 | if (key==null || key.trim().length()==0) { | |
| 105 | return null; | |
| 106 | } | |
| 107 | LocalCacheData localCacheData = cacheRepository.get(key); | |
| 108 | if (localCacheData!=null && System.currentTimeMillis()<localCacheData.getTimeoutTime()) { | |
| 109 | return localCacheData.getVal(); | |
| 110 | } else { | |
| 111 | remove(key); | |
| 112 | return null; | |
| 113 | } | |
| 114 | } | |
| 115 | ||
| 116 | /** | |
| 117 | * clean timeout cache | |
| 118 | * | |
| 119 | * @return | |
| 120 | */ | |
| 121 | public static boolean cleanTimeoutCache(){ | |
| 122 | if (!cacheRepository.keySet().isEmpty()) { | |
| 123 | for (String key: cacheRepository.keySet()) { | |
| 124 | LocalCacheData localCacheData = cacheRepository.get(key); | |
| 125 | if (localCacheData!=null && System.currentTimeMillis()>=localCacheData.getTimeoutTime()) { | |
| 126 | cacheRepository.remove(key); | |
| 127 | } | |
| 128 | } | |
| 129 | } | |
| 130 | return true; | |
| 131 | } | |
| 132 | ||
| 133 | } | |
