Starting up jmx remote agent on a specified port in case it was not started by the JVM. (No jmxremote jvm arg specified on startup )

loadJMXAgent.java

public static String loadJMXAgent(int port) throws IOException,
        AttachNotSupportedException, AgentLoadException,
        AgentInitializationException {
    String name = ManagementFactory.getRuntimeMXBean().getName();
    VirtualMachine vm = VirtualMachine.attach(name.substring(0,
            name.indexOf('@')));

    String lca = vm.getAgentProperties().getProperty(
            "com.sun.management.jmxremote.localConnectorAddress");
    if (lca == null) {
        Path p = Paths.get(System.getProperty("java.home")).normalize();
        if (!"jre".equals(p.getName(p.getNameCount() - 1).toString()
                .toLowerCase())) {
            p = p.resolve("jre");
        }
        File f = p.resolve("lib").resolve("management-agent.jar").toFile();
        if (!f.exists()) {
            throw new IOException("Management agent not found");
        }
        String options = String.format("com.sun.management.jmxremote.port=%d, " +
                "com.sun.management.jmxremote.authenticate=false, " +
                "com.sun.management.jmxremote.ssl=false", port);
        vm.loadAgent(f.getCanonicalPath(), options);
        lca = vm.getAgentProperties().getProperty(
                "com.sun.management.jmxremote.localConnectorAddress");
    }
    vm.detach();
    return lca;
}