subprojects/s4-tools/src/main/java/org/apache/s4/tools/DefineCluster.java

package org.apache.s4.tools;

import java.util.Arrays;

import org.apache.log4j.BasicConfigurator;
import org.apache.log4j.Level;
import org.apache.s4.comm.tools.TaskSetup;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.beust.jcommander.JCommander;
import com.beust.jcommander.Parameter;
import com.beust.jcommander.Parameters;

public class DefineCluster {

    static Logger logger = LoggerFactory.getLogger(DefineCluster.class);

    public static void main(String[] args) {
        // configure log4j for Zookeeper
        BasicConfigurator.configure();
        org.apache.log4j.Logger.getLogger("org.apache.zookeeper").setLevel(Level.ERROR);
        org.apache.log4j.Logger.getLogger("org.I0Itec").setLevel(Level.ERROR);

        ZKServerArgs clusterArgs = new ZKServerArgs();
        JCommander jc = new JCommander(clusterArgs);
        try {
            jc.parse(args);
        } catch (Exception e) {
            System.out.println(Arrays.toString(args));
            e.printStackTrace();
            jc.usage();
            System.exit(-1);
        }
        try {

            logger.info("preparing new cluster [{}] with [{}] node(s)", clusterArgs.clusterName, clusterArgs.nbTasks);

            TaskSetup taskSetup = new TaskSetup(clusterArgs.zkConnectionString);
            taskSetup.clean(clusterArgs.clusterName);
            taskSetup.setup(clusterArgs.clusterName, clusterArgs.nbTasks, clusterArgs.firstListeningPort);
            logger.info("New cluster configuration uploaded into zookeeper");
        } catch (Exception e) {
            logger.error("Cannot initialize zookeeper with specified configuration", e);
        }

    }

    @Parameters(separators = "=", commandDescription = "Setup new S4 logical cluster")
    static class ZKServerArgs {

        @Parameter(names = "-name", description = "S4 cluster name", required = true)
        String clusterName = "s4-test-cluster";

        @Parameter(names = "-nbTasks", description = "number of tasks for the cluster", required = true)
        int nbTasks = 1;

        @Parameter(names = "-zk", description = "Zookeeper connection string")
        String zkConnectionString = "localhost:2181";

        @Parameter(names = "-firstListeningPort", description = "Initial listening port for nodes in this cluster. First node listens on the specified port, other nodes listen on port initial + nodeIndex", required = true)
        int firstListeningPort = -1;
    }

}