Ehcache 下 用jgroup进行复制，Ehcache集群

从官方文档上了解到 用RMI 比较简单，按官方的配置，试了n遍都不成功。配置和网上的一样，还是不行，对rmi没有兴趣了，转用Jgroup.

1. 下载资源

Jgroup, http://sourceforge.net/projects/javagroups/files/JGroups/2.12.1.Final/jgroups-2.12.1.Final.jar/download

我的ehcache用的是2.4.2 Jgroup 要用2.1，我试了用 jgroup3.0 会报错。

ehcache-jgroupsreplication-1.4

http://ehcache.org/downloads/destination?name=ehcache-jgroupsreplication-1.4-distribution.tar.gz&bucket=tcdistributions&file=ehcache-jgroupsreplication-1.4-distribution.tar.gz

2. ehcache.xml ，放到classpath下，配置如下：

测试代码：

package com.test.ehcache;

import java.util.List;

import net.sf.ehcache.Cache;
import net.sf.ehcache.CacheManager;
import net.sf.ehcache.Element;

public class CacheLocalManager {
	private static final CacheManager cacheManager = new CacheManager();
	public CacheLocalManager() {
		// TODO Auto-generated constructor stub
	}
	public static CacheManager getCacheManager() {
		return cacheManager;
	}
	public static Cache getCache(String cacheName) {
		return getCacheManager().getCache(cacheName);
	}
	public static Object readCache(String key, String cacheName){
		try {
			Cache cache = getCache(cacheName);
			Element element = cache.get(key);
			if (element != null) {
				return element.getValue();
			}
		} catch (Exception e) {
			e.printStackTrace();
		}
		return null;
	}

	public static boolean removeCache(String key, String cacheName){
		try {
			Cache cache = getCache(cacheName);
			cache.remove(key);
			cache.flush();
		} catch (Exception e) {
			e.printStackTrace();
			return false;
		}
		return true;
	}

	public static boolean saveCache(String key, Object value, String cacheName){
		try {
			Cache cache = getCache(cacheName);
			Element element = new Element(key,value);
			cache.put(element);
		} catch (Exception e) {
			e.printStackTrace();
			return false;
		}
		return true;
	}
	
	public static boolean removeAllCache(String cacheName) {
		try {
			Cache cache = getCache(cacheName);
			cache.removeAll();
			cache.flush();
		} catch (Exception e) {
			e.printStackTrace();
			return false;
		}
		return true;
	}
	
	public static int cacheSize(String cacheName) {
		try {
			Cache cache = getCache(cacheName);
			return cache.getSize();
		} catch (Exception e) {
			e.printStackTrace();
			return 0;
		}
	}
	
	public static List getCacheKeys(String cacheName) {
		try {
			Cache cache = getCache(cacheName);
			return cache.getKeys();
		} catch (Exception e) {
			e.printStackTrace();
			return null;
		}
	}

}

package com.test.ehcache;

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class Cache extends HttpServlet {

	/**
	 * Constructor of the object.
	 */
	public Cache() {
		super();
	}

	/**
	 * Destruction of the servlet. 

	 */
	public void destroy() {
		super.destroy(); // Just puts "destroy" string in log
		// Put your code here
	}

	/**
	 * The doGet method of the servlet. 

	 *
	 * This method is called when a form has its tag value method equals to get.
	 * 
	 * @param request the request send by the client to the server
	 * @param response the response send by the server to the client
	 * @throws ServletException if an error occurred
	 * @throws IOException if an error occurred
	 */
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		response.setContentType("text/html");
		PrintWriter out = response.getWriter();
		String action = request.getParameter("action");
		if(action.equals("read")){
			String value = (String)CacheLocalManager.readCache("key", "Cache_Test");
			out.print("cache data==>"+value);
		}
		if(action.equals("write")){
			CacheLocalManager.saveCache("key", "cache test", "Cache_Test");
			out.print("write ok");
		}
		if(action.equals("clear")){
			CacheLocalManager.removeCache("key", "Cache_Test");
			out.print("clear ok");
		}
		out.flush();
		out.close();
	}

	/**
	 * The doPost method of the servlet. 

	 *
	 * This method is called when a form has its tag value method equals to post.
	 * 
	 * @param request the request send by the client to the server
	 * @param response the response send by the server to the client
	 * @throws ServletException if an error occurred
	 * @throws IOException if an error occurred
	 */
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		response.setContentType("text/html");
		PrintWriter out = response.getWriter();
		out
				.println("");
		out.println("");
		out.println("  ");
		out.println("  ");
		out.print("    This is ");
		out.print(this.getClass());
		out.println(", using the POST method");
		out.println("  ");
		out.println("");
		out.flush();
		out.close();
	}

	/**
	 * Initialization of the servlet. 

	 *
	 * @throws ServletException if an error occurs
	 */
	public void init() throws ServletException {
		// Put your code here
	}

}

<%@ page language="java" import="java.util.*" pageEncoding="ISO-8859-1"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>



  
    
    
    
	
	
	    
	
	
	
  
  
  
    read
	write
    clear
  

jar包为：

dom4j-1.6.1.jar

ehcache-core-2.4.2.jar

ehcache-terracotta-2.4.2.jar

log4j-1.2.13.jar

slf4j-api-1.6.1.jar

slf4j-simple-1.6.1.jar

ehcache-jgroupsreplication-1.4.jar

jgroups-2.12.1.Final.jar