org.springframework.boot.util.SystemUtils.java Source code

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Here is the source code for org.springframework.boot.util.SystemUtils.java

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/*
 * Copyright 2010-2014 the original author or authors.
 *
 * Licensed 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.springframework.boot.util;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.util.StringUtils;

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

/**
 * Class containing methods related to system utilities
 *
 * @author Jakub Kubrynski
 */
public class SystemUtils {

    private static final Log LOG = LogFactory.getLog(SystemUtils.class);

    /**
     * Looks for application PID
     * @return application PID
     * @throws java.lang.IllegalStateException if PID could not be determined
     */
    public static String getApplicationPid() {
        String pid = null;
        try {
            RuntimeMXBean runtimeBean = ManagementFactory.getRuntimeMXBean();
            String jvmName = runtimeBean.getName();
            if (StringUtils.isEmpty(jvmName)) {
                LOG.warn("Cannot get JVM name");
            }
            if (!jvmName.contains("@")) {
                LOG.warn("JVM name doesn't contain process id");
            }
            pid = jvmName.split("@")[0];
        } catch (Throwable e) {
            LOG.warn("Cannot get RuntimeMXBean", e);
        }

        if (pid == null) {
            throw new IllegalStateException("Application PID not found");
        }

        return pid;
    }

}