EvictionConfig evictionConfig = new EvictionConfig()
.setEvictionPolicy(EvictionPolicy.LFU)
.setMaximumSizePolicy(EvictionConfig.MaxSizePolicy.ENTRY_COUNT)
.setSize(10000);
NearCacheConfig nearCacheConfig = new NearCacheConfig()
.setName("nearcache")
.setEvictionConfig(evictionConfig);
ClientConfig clientConfig = new ClientConfig();
clientConfig.addNearCacheConfig(nearCacheConfig);
/* Accessing the Map */
IMapJet<String,String> map = jet.getMap("nearcache");
for(String key: map.keySet()){
String value = map .get(key);
}
NearCacheStats nearCacheStatistics = map.getLocalMapStats().getNearCacheStats();
System.out.println( "Near Cache hit/miss ratio = "
+ nearCacheStatistics.getHits());
我作为 Java 客户端连接到 Hazelcast 集群,getMap 返回一些值,因此我没有向地图插入任何值,因为它包含大约 200 个值。
nearCacheStatistics 返回 NullPointerException。谁能告诉我我做错了什么?