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package com.luhuiguo.fastdfs.conn;

import java.net.InetSocketAddress;
import java.util.ArrayList;
import java.util.List;

import com.luhuiguo.fastdfs.domain.TrackerLocator;
import com.luhuiguo.fastdfs.exception.FdfsConnectException;
import com.luhuiguo.fastdfs.proto.FdfsCommand;

/**
 * 管理TrackerClient连接池分配
 * 
 * @author luhuiguo
 *
 */
public class TrackerConnectionManager extends ConnectionManager {

    /** Tracker定位 */
    private TrackerLocator trackerLocator;

    /** tracker服务配置地址列表 */
    private List trackerList = new ArrayList();


    /** 构造函数 */
    public TrackerConnectionManager(FdfsConnectionPool pool,List trackerList) {
        super(pool);
        this.trackerList = trackerList;
        trackerLocator = new TrackerLocator(trackerList);
    }
    

    /**
     * 获取连接并执行交易
     * 
     * @param address
     * @param command
     * @return
     */
    public  T executeFdfsTrackerCmd(FdfsCommand command) {
        Connection conn = null;
        InetSocketAddress address = null;
        // 获取连接
        try {
            address = trackerLocator.getTrackerAddress();
            LOGGER.debug("获取到Tracker连接地址{}", address);
            conn = getConnection(address);
            trackerLocator.setActive(address);
        } catch (FdfsConnectException e) {
            trackerLocator.setInActive(address);
            throw e;
        } catch (Exception e) {
            LOGGER.error("Unable to borrow buffer from pool", e);
            throw new RuntimeException("Unable to borrow buffer from pool", e);
        }
        // 执行交易
        return execute(address, conn, command);
    }

    public List getTrackerList() {
        return trackerList;
    }

    public void setTrackerList(List trackerList) {
        this.trackerList = trackerList;
    }
}