org.apache.ivory.replication.FeedReplicator.java Source code

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Here is the source code for org.apache.ivory.replication.FeedReplicator.java

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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.ivory.replication;

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

import org.apache.commons.cli.CommandLine;
import org.apache.commons.cli.GnuParser;
import org.apache.commons.cli.Option;
import org.apache.commons.cli.Options;
import org.apache.commons.cli.ParseException;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.conf.Configured;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.tools.DistCp;
import org.apache.hadoop.tools.DistCpOptions;
import org.apache.hadoop.util.Tool;
import org.apache.hadoop.util.ToolRunner;
import org.apache.log4j.Logger;

public class FeedReplicator extends Configured implements Tool {

    private static Logger LOG = Logger.getLogger(FeedReplicator.class);

    public static void main(String[] args) throws Exception {
        ToolRunner.run(new Configuration(), new FeedReplicator(), args);
    }

    @Override
    public int run(String[] args) throws Exception {

        DistCpOptions options = getDistCpOptions(args);
        DistCp distCp = new CustomReplicator(this.getConf(), options);
        LOG.info("Started DistCp");
        distCp.execute();
        LOG.info("Completed DistCp");
        return 0;

    }

    public DistCpOptions getDistCpOptions(String[] args) throws ParseException {
        Options options = new Options();
        Option opt;
        opt = new Option("update", false, "specify update for synching folders");
        opt.setRequired(true);
        options.addOption(opt);

        opt = new Option("blocking", true, "should DistCp be running in blocking mode");
        opt.setRequired(true);
        options.addOption(opt);

        opt = new Option("maxMaps", true, "max number of maps to use for this copy");
        opt.setRequired(true);
        options.addOption(opt);

        opt = new Option("sourcePaths", true, "comma separtated list of source paths to be copied");
        opt.setRequired(true);
        options.addOption(opt);

        opt = new Option("targetPath", true, "target path");
        opt.setRequired(true);
        options.addOption(opt);

        CommandLine cmd = new GnuParser().parse(options, args);
        String[] paths = cmd.getOptionValue("sourcePaths").trim().split(",");
        List<Path> srcPaths = getPaths(paths);
        String trgPath = cmd.getOptionValue("targetPath").trim();

        DistCpOptions distcpOptions = new DistCpOptions(srcPaths, new Path(trgPath));
        distcpOptions.setSyncFolder(true);
        distcpOptions.setBlocking(Boolean.valueOf(cmd.getOptionValue("blocking")));
        distcpOptions.setMaxMaps(Integer.valueOf(cmd.getOptionValue("maxMaps")));

        return distcpOptions;
    }

    private List<Path> getPaths(String[] paths) {
        List<Path> listPaths = new ArrayList<Path>();
        for (String path : paths) {
            listPaths.add(new Path(path));
        }
        return listPaths;
    }
}