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Willow elastic cloud application deployer

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package com.nitorcreations.willow.deployer;

import java.util.ArrayList;
import java.util.List;
import java.util.logging.Level;

import javax.inject.Singleton;
import javax.management.JMX;
import javax.management.MBeanServerConnection;
import javax.management.remote.JMXConnector;

import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;

@Singleton
@SuppressFBWarnings(value={"DM_EXIT"}, justification="cli tool needs to convey correct exit code")
public class Status extends DeployerControl {
  public static void main(String[] args) {
    injector.getInstance(Status.class).doMain(args);
  }

  public void doMain(String[] args) {
    try {
      List firstPids;
      if (args.length > 0) {
        firstPids = new ArrayList<>();
        for (String next : args) {
          long nextPid = findOldDeployerPid(next);
          if (nextPid > 0) {
            firstPids.add(nextPid);
          }
        }
      } else {
        firstPids = findOldDeployerPids();
      }
      for (long next : firstPids) {
        try (JMXConnector conn = getJMXConnector(next)) {
          if (conn == null) {
            log.log(Level.WARNING, "Failed to connect to deployer " + deployerName);
            System.exit(1);
          }
          MBeanServerConnection server = conn.getMBeanServerConnection();
          MainMBean proxy = JMX.newMBeanProxy(server, OBJECT_NAME, MainMBean.class);
          System.out.println(proxy.getStatus());
          System.exit(0);
        } catch (Throwable e) {
          log.log(Level.INFO, "JMX Status failed", e);
          System.exit(1);
        }
      }
    } catch (Throwable e) {
      log.log(Level.WARNING, "Failed to connect to deployer " + deployerName);
    }
  }
}