alluxio.cli.fs.command.MasterInfoCommand.java Source code

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Here is the source code for alluxio.cli.fs.command.MasterInfoCommand.java

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/*
 * The Alluxio Open Foundation licenses this work under the Apache License, version 2.0
 * (the "License"). You may not use this work except in compliance with the License, which is
 * available at www.apache.org/licenses/LICENSE-2.0
 *
 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
 * either express or implied, as more fully set forth in the License.
 *
 * See the NOTICE file distributed with this work for information regarding copyright ownership.
 */

package alluxio.cli.fs.command;

import alluxio.cli.CommandUtils;
import alluxio.client.file.FileSystem;
import alluxio.exception.status.InvalidArgumentException;
import alluxio.exception.status.UnavailableException;
import alluxio.master.MasterInquireClient;

import org.apache.commons.cli.CommandLine;

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

import javax.annotation.concurrent.ThreadSafe;

/**
 * Prints information regarding master fault tolerance such as leader address, list of master
 * addresses, and the configured Zookeeper address.
 */
@ThreadSafe
public final class MasterInfoCommand extends AbstractFileSystemCommand {
    /**
     * @param fs the {@link FileSystem}
     */
    public MasterInfoCommand(FileSystem fs) {
        super(fs);
    }

    @Override
    public String getCommandName() {
        return "masterInfo";
    }

    @Override
    public void validateArgs(CommandLine cl) throws InvalidArgumentException {
        CommandUtils.checkNumOfArgsEquals(this, cl, 0);
    }

    @Override
    public int run(CommandLine cl) {
        MasterInquireClient inquireClient = MasterInquireClient.Factory.create();
        try {
            InetSocketAddress leaderAddress = inquireClient.getPrimaryRpcAddress();
            System.out.println("Current leader master: " + leaderAddress.toString());
        } catch (UnavailableException e) {
            System.out.println("Failed to find leader master");
        }

        try {
            List<InetSocketAddress> masterAddresses = inquireClient.getMasterRpcAddresses();
            System.out.println(String.format("All masters: %s", masterAddresses));
        } catch (UnavailableException e) {
            System.out.println("Failed to find all master addresses");
        }
        return 0;
    }

    @Override
    public String getUsage() {
        return "masterInfo";
    }

    @Override
    public String getDescription() {
        return "Prints information regarding master fault tolerance such as leader address, list of "
                + "master addresses, and the configured Zookeeper address.";
    }
}