io.bigio.cli.MembersCommand Maven / Gradle / Ivy

/*
 * Copyright (c) 2014, Archarithms Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
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 * 1. Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer. 
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
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 */

package io.bigio.cli;

import io.bigio.CommandLine;
import io.bigio.Component;
import io.bigio.Inject;
import io.bigio.Speaker;
import io.bigio.core.member.Member;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * This is the "members" CLI command. This command will print all discovered
 * members in a BigIO cluster.
 * 
 * @author Andy Trimble
 */
@Component
public class MembersCommand implements CommandLine {

    private static final Logger LOG = LoggerFactory.getLogger(MembersCommand.class);
    
    @Inject
    private Speaker speaker;

    /**
     * Get the command string.
     * 
     * @return the command.
     */
    @Override
    public String getCommand() {
        return "members";
    }

    /**
     * Execute the command.
     * 
     * @param args the arguments to the command (if any).
     */
    @Override
    public void execute(String... args) {
        System.out.println();
        for(Member member : speaker.listMembers()) {
            System.out.println(member.toString());
        }
    }

    /**
     * Return the help/description string for display.
     * 
     * @return the help/description string
     */
    @Override
    public String help() {
        return "Prints the set of known members of the cluster.";
    }
}