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    • com.jeesuite.cache.local.GuavaLevel1CacheProvider Maven / Gradle / Ivy

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    /**
 * 
 */
package com.jeesuite.cache.local;

import java.io.IOException;
import java.util.Map;
import java.util.concurrent.Callable;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.TimeUnit;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.google.common.cache.Cache;
import com.google.common.cache.CacheBuilder;

/**
 * 本地缓存服务
 * @description 
    
 * @author vakin
 * @date 2016年6月1日
 */
public class GuavaLevel1CacheProvider implements Level1CacheProvider{
	
	private static final String _NULL = "NULL";

	private static final Logger logger = LoggerFactory.getLogger(GuavaLevel1CacheProvider.class);
	
	private Map> caches = new ConcurrentHashMap>();
	private int maxSize = 10000;
	private int timeToLiveSeconds = 600;
	
	public void setMaxSize(int maxSize) {
		this.maxSize = maxSize;
	}

	public void setTimeToLiveSeconds(int timeToLiveSeconds) {
		this.timeToLiveSeconds = timeToLiveSeconds;
	}

	@Override
	public void start() {
		
	}

	public boolean set(String cacheName,String key,Object value){
		if(value == null)return true;
		Cache cache = getCacheHolder(cacheName);
		if(cache != null){
			cache.put(key, value);
		}
		return true;
	}

	@SuppressWarnings("unchecked")
	public  T get(String cacheName,String key){
		try {			
			Cache cache = getCacheHolder(cacheName);
			if(cache != null){
				Object result = cache.get(key, new Callable() {
					@Override
					public Object call() throws Exception {
						return _NULL;
					}
				});
				if(result != null && !_NULL.equals(result)){
					return (T)result;
				}
			}
		} catch (Exception e) {
			logger.warn("get LEVEL1 cache error",e);
		}
		return null;
	}
	
	public void remove(String cacheName,String key){
		Cache cache = getCacheHolder(cacheName);
		if(cache != null){
			cache.invalidateAll();
		}
	}
	
	private Cache getCacheHolder(String cacheName){
		return getAndNotexistsCreateCache(cacheName);
	}
	
	private Cache getAndNotexistsCreateCache(String cacheName){
		Cache cache = caches.get(cacheName);
		if(cache != null)return cache;
		synchronized (caches) {
			if((cache = caches.get(cacheName)) != null)return cache;
			cache = CacheBuilder
					.newBuilder()
					.maximumSize(maxSize)
					.expireAfterWrite(timeToLiveSeconds, TimeUnit.SECONDS)
					.build();
			caches.put(cacheName, cache);
		}
		return cache;	
	}
	
	public  void remove(String cacheName){
		
	}
	
	public void clearAll(){
		for (Cache cache : caches.values()) {
			cache.invalidateAll();
		}
	}


	@Override
	public void close() throws IOException {}
	
	
}
    
    
    
    

    




    
    
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