com.dianping.squirrel.client.impl.memcached.MemcachedClientConfig.java Source code

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Here is the source code for com.dianping.squirrel.client.impl.memcached.MemcachedClientConfig.java

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/**
 * Project: avatar-cache
 * 
 * File Created at 2010-7-12
 * $Id$
 * 
 * Copyright 2010 Dianping.com Corporation Limited.
 * All rights reserved.
 *
 * This software is the confidential and proprietary information of
 * Dianping Company. ("Confidential Information").  You shall not
 * disclose such Confidential Information and shall use it only in
 * accordance with the terms of the license agreement you entered into
 * with Dianping.com.
 */
package com.dianping.squirrel.client.impl.memcached;

import java.util.ArrayList;
import java.util.List;

import org.apache.commons.lang.builder.ToStringBuilder;
import org.apache.commons.lang.builder.ToStringStyle;

import net.spy.memcached.transcoders.Transcoder;

import com.dianping.squirrel.client.config.StoreClientConfig;
import com.dianping.squirrel.client.core.CacheConfigurationListener;
import com.dianping.squirrel.common.exception.StoreInitializeException;

/**
 * The configuration for memcached client implementation(Spymemcached)
 * 
 * @author guoqing.chen
 * 
 */
public class MemcachedClientConfig implements StoreClientConfig {

    /**
     * All servers
     */
    private List<String> servers = new ArrayList<String>();

    /**
     * Transcoder
     */
    private Transcoder<Object> transcoder;

    private String clientClazz;

    private CacheConfigurationListener cacheConfigurationListener;

    public CacheConfigurationListener getCacheConfigurationListener() {
        return cacheConfigurationListener;
    }

    public void setCacheConfigurationListener(CacheConfigurationListener cacheConfigurationListener) {
        this.cacheConfigurationListener = cacheConfigurationListener;
    }

    /**
     * Add memcached server and prot
     */
    public void addServer(String server, int port) {
        addServer(server + ":" + port);
    }

    public void addServer(String address) {
        servers.add(address);
    }

    public void setServerList(List<String> servers) {
        this.servers = servers;
    }

    public List<String> getServerList() {
        return this.servers;
    }

    public String getServers() {

        StringBuffer sb = new StringBuffer();

        for (String server : servers) {
            sb.append(server.trim());
            sb.append(" ");
        }

        return sb.toString().trim();
    }

    /**
     * @return the transcoder
     */
    public Transcoder<Object> getTranscoder() {
        return transcoder;
    }

    /**
     * @param transcoder
     *            the transcoder to set
     */
    public void setTranscoder(Transcoder<Object> transcoder) {
        this.transcoder = transcoder;
    }

    @SuppressWarnings("unchecked")
    public void setTranscoderClass(Class<?> transcoderClass) throws Exception {
        Transcoder<Object> transcoder = (Transcoder<Object>) transcoderClass.newInstance();
        setTranscoder(transcoder);
    }

    public String getClientClazz() {
        return this.clientClazz;
    }

    public void setClientClazz(String clientClazz) {
        this.clientClazz = clientClazz;
    }

    @Override
    public void init() throws StoreInitializeException {
        ensureSpymemcachedVersion();
    }

    private void ensureSpymemcachedVersion() throws StoreInitializeException {
        try {
            Class.forName("net.spy.memcached.internal.GetCompletionListener");
        } catch (ClassNotFoundException e) {
            throw new StoreInitializeException(
                    "spymemcached version is too low, please upgrade to version 2.11.x or above", e);
        }
    }

    public boolean isVersionChanged(String category, int recentSeconds) {
        if (cacheConfigurationListener != null) {
            return cacheConfigurationListener.isVersionChanged(category, recentSeconds);
        } else {
            return false;
        }
    }

    public String toString() {
        return new ToStringBuilder(this, ToStringStyle.SHORT_PREFIX_STYLE).append("servers", getServers())
                .toString();
    }

}