Java Hazelcast近缓存不使用简单示例
我目前正在使用hazelcast版本3.9 我尝试了几种实现近缓存的方法,但似乎找不到正确的方法。下面我分享了我的代码,让我知道我到底哪里出错了Java Hazelcast近缓存不使用简单示例,java,hazelcast,hazelcast-imap,near-cache,Java,Hazelcast,Hazelcast Imap,Near Cache,我目前正在使用hazelcast版本3.9 我尝试了几种实现近缓存的方法,但似乎找不到正确的方法。下面我分享了我的代码,让我知道我到底哪里出错了 public class NearCacheExample { public static void main(String[] args) throws IOException { HazelcastConfig hzConfig = new HazelcastConfig(); Haze
public class NearCacheExample {
public static void main(String[] args) throws IOException
{
HazelcastConfig hzConfig = new HazelcastConfig();
HazelcastInstance hzInstance = hzConfig.getHZInstance();
IMap<Double, String> nearCacheMap = hzInstance.getMap("cacheExample");
for (int i = 0; i < 100000; i++) {
nearCacheMap.set(Math.random(), i + "");
}
long startTime = System.currentTimeMillis();
System.out.println("---------------------------Before Sort----------------------------------");
for (Entry<Double, String> entrySet : nearCacheMap.entrySet()) {
Double key = entrySet.getKey();
String value = entrySet.getValue();
}
long endTime = System.currentTimeMillis();
System.out.println("------------------------------------------------Read Both---------------------------------------------------");
NearCacheStats nearCacheStatistics = nearCacheMap.getLocalMapStats().getNearCacheStats();
System.out.println( "Near Cache hit/miss ratio 3= "
+ nearCacheStatistics.getHits());
System.out.println("Near cache implemented or not " + nearCacheMap.getLocalMapStats().getNearCacheStats().getOwnedEntryCount());
System.out.println(" EndTime timeDifference : " + startTime + " " + endTime + " " +(endTime-startTime));
}
}
Hazelcast客户端的配置
<near-cache name="default">
<in-memory-format>BINARY</in-memory-format>
<invalidate-on-change>true</invalidate-on-change>
<eviction eviction-policy="NONE" max-size-policy="ENTRY_COUNT" size="10"/>
二元的
真的
我还尝试更改hazelcast-client.xml文件中的缓存名称。似乎什么都不管用
hazelcast服务器端没有任何变化。@Tatkal
map.set
使近缓存放置无效不要将新值放在那里String value=nearCacheMap.get(entrySet.getKey())代码>或将循环更改为键集,如
我想你的意思是:
String value=nearCacheMap.get(entrySet.getKey())代码>或更简化:for(双键:nearCacheMap.keySet()){String value=nearCacheMap.get(key);}@OzanKılıç是的,没错,我把它改成了keySet,因为它是cheaper@GokhanOner感谢您的回复…我忘记接受您的回答。参考:,驱逐策略=无
:将不会驱逐任何项目,并且将忽略属性的最大大小。您仍然可以将其与生存时间秒和最大空闲秒相结合,从近缓存中逐出项目。
<near-cache name="default">
<in-memory-format>BINARY</in-memory-format>
<invalidate-on-change>true</invalidate-on-change>
<eviction eviction-policy="NONE" max-size-policy="ENTRY_COUNT" size="10"/>
for (Double key : nearCacheMap.keySet()) {
String value = entrySet.getValue(key);
}
---------------------------Before Sort----------------------------------
------------------------------------------------Read Both---------------------------------------------------
Near Cache hit/miss ratio = 0 / 100000
Near cache implemented or not 10
EndTime timeDifference : 1548313357643 1548313362527 4884
------------------------------------------------Read Both---------------------------------------------------
Near Cache hit/miss ratio = 10 / 199990
Near cache implemented or not 10
EndTime timeDifference : 1548313357643 1548313367155 9512
------------------------------------------------Read Both---------------------------------------------------
Near Cache hit/miss ratio = 20 / 299980
Near cache implemented or not 10
EndTime timeDifference : 1548313357643 1548313371688 14045