com.github.panhongan.utils.process.ProcessUtils Maven / Gradle / Ivy

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package com.github.panhongan.utils.process;

import javax.annotation.Nonnull;

import java.lang.management.ManagementFactory;
import java.util.function.Supplier;

/**
 * lalalu plus
 */
public class ProcessUtils {

	private static Supplier pidSupplier = () -> getPidExec();

	private static Supplier javaCmdSupplier = () -> getJavaCmdExec();

	@Nonnull
	public static Integer getPid() {
		return pidSupplier.get();
	}

	@Nonnull
	public static String getJavaCmd() {
		return javaCmdSupplier.get();
	}

	@Nonnull
	public static String getMainName() {
		return getJavaCmd().split(" ")[0];
	}

	public static String getCmdOptions() {
		String cmd = getJavaCmd();
		int pos = cmd.indexOf(' ');
		if (pos > 0) {
			return cmd.substring(cmd.indexOf(' ') + 1);
		} else {
			return null;
		}
	}

	private static Integer getPidExec() {
		try {
			String name = ManagementFactory.getRuntimeMXBean().getName();
			return Integer.parseInt(name.substring(0, name.indexOf('@')));
		} catch (Throwable t) {
			return null;
		}
	}

	private static String getJavaCmdExec() {
		return System.getProperty("sun.java.command");
	}

}