org.apache.gobblin.util.JvmUtils.java Source code

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Here is the source code for org.apache.gobblin.util.JvmUtils.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.gobblin.util;

import com.google.common.base.Joiner;
import com.google.common.base.Optional;
import org.apache.commons.lang.StringUtils;

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

public class JvmUtils {
    private static final Joiner JOINER = Joiner.on(" ").skipNulls();

    private static final PortUtils PORT_UTILS = new PortUtils();

    private JvmUtils() {
    }

    /**
     * Gets the input arguments passed to the JVM.
     * @return The input arguments.
     */
    public static String getJvmInputArguments() {
        RuntimeMXBean runtimeMxBean = ManagementFactory.getRuntimeMXBean();
        List<String> arguments = runtimeMxBean.getInputArguments();
        return String.format("JVM Input Arguments: %s", JOINER.join(arguments));
    }

    /**
     * Formats the specified jvm arguments such that any tokens are replaced with concrete values;
     * @param jvmArguments
     * @return The formatted jvm arguments.
     */
    public static String formatJvmArguments(Optional<String> jvmArguments) {
        if (jvmArguments.isPresent()) {
            return PORT_UTILS.replacePortTokens(jvmArguments.get());
        }
        return StringUtils.EMPTY;
    }
}