com.alibaba.wasp.util.ServerCommandLine.java Source code

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Here is the source code for com.alibaba.wasp.util.ServerCommandLine.java

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/**
 * Copyright The Apache Software Foundation
 *
 * 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 com.alibaba.wasp.util;

import com.alibaba.wasp.conf.WaspConfiguration;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.conf.Configured;
import org.apache.hadoop.util.Tool;
import org.apache.hadoop.util.ToolRunner;

import java.lang.management.ManagementFactory;
import java.lang.management.RuntimeMXBean;

public abstract class ServerCommandLine extends Configured implements Tool {
    private static final Log LOG = LogFactory.getLog(ServerCommandLine.class);

    /**
     * Implementing subclasses should return a usage string to print out.
     */
    protected abstract String getUsage();

    /**
     * Print usage information for this command line.
     *
     * @param message if not null, print this message before the usage info.
     */
    protected void usage(String message) {
        if (message != null) {
            System.err.println(message);
            System.err.println("");
        }

        System.err.println(getUsage());
    }

    /**
     * Log information about the currently running JVM.
     */
    public static void logJVMInfo() {
        // Print out vm stats before starting up.
        RuntimeMXBean runtime = ManagementFactory.getRuntimeMXBean();
        if (runtime != null) {
            LOG.info("vmName=" + runtime.getVmName() + ", vmVendor=" + runtime.getVmVendor() + ", vmVersion="
                    + runtime.getVmVersion());
            LOG.info("vmInputArguments=" + runtime.getInputArguments());
        }
    }

    /**
     * Parse and run the given command line. This may exit the JVM if
     * a nonzero exit code is returned from <code>run()</code>.
     */
    public void doMain(String args[]) {
        try {
            int ret = ToolRunner.run(WaspConfiguration.create(), this, args);
            if (ret != 0) {
                System.exit(ret);
            }
        } catch (Exception e) {
            LOG.error("Failed to run", e);
            System.exit(-1);
        }
    }
}