代码片段2

package com.glsx.main;

import com.glsx.constants.Constant;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.*;
import org.apache.hadoop.hbase.client.Admin;
import org.apache.hadoop.hbase.client.Connection;
import org.apache.hadoop.hbase.client.ConnectionFactory;
import org.apache.hadoop.hbase.util.Bytes;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.IOException;
import java.util.Map;

public class CompactMain {
private static final Logger LOG = LoggerFactory.getLogger(CompactMain.class);

public static void main(String[] args) throws IOException {
    LOG.info("The job starting...");
    long begin = System.currentTimeMillis();

    Configuration conf = HBaseConfiguration.create();
    conf.set("hbase.zookeeper.quorum", "hadoop-offline-60,hadoop-offline-61,hadoop-offline-62");

    Connection connection = ConnectionFactory.createConnection(conf);
    Admin admin = connection.getAdmin();

    int numTotalCompact = 0;
    ClusterStatus clusterStatus = admin.getClusterStatus();
    for (ServerName sn : clusterStatus.getServers()) {
        int maxCompactByServer = 0;
        ServerLoad serverLoad = clusterStatus.getLoad(sn);
        for (Map.Entry<byte[], RegionLoad> regionLoadEntry : serverLoad.getRegionsLoad().entrySet()) {
            RegionLoad rlValue = regionLoadEntry.getValue();
            String regionName = Bytes.toStringBinary(rlValue.getName());
            if (rlValue.getStorefiles() >= Constant.NUM_STOREFILES) {
                ++numTotalCompact;
                ++maxCompactByServer;
                LOG.info("HostName=" + sn.getHostname() + ",regionName=" + regionName + ", storefilesCount=" + rlValue.getStorefiles());

                admin.majorCompactRegion(rlValue.getName());

                if (maxCompactByServer == Constant.MAX_COMPACT_BY_SERVER) break;
            }
        }
    }

    LOG.info("numTotalCompact=" + numTotalCompact);

    admin.close();
    connection.close();

    LOG.info("The job is ended, total cost time :" + (System.currentTimeMillis()-begin)/1000 + "s");
}

}