com.facebook.nailgun.builtins.NGServerStats Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of nailgun-server Show documentation

Nailgun is a client, protocol and server for running Java programs from the command line without incurring the JVM startup overhead. Programs run in the server (which is implemented in Java), and are triggered by the client (C and Python clients available), which handles all I/O. This project contains the SERVER ONLY.

The newest version!

/*

  Copyright 2004-2012, Martian Software, Inc.
Copyright 2017-Present Facebook, Inc

  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 com.facebook.nailgun.builtins;

import com.facebook.nailgun.NGContext;
import com.facebook.nailgun.NGServer;
import java.util.Iterator;
import java.util.Map;

/**
 * Displays all NailStats tracked by the server.
 *
 * This can be run standalone with no arguments. It will also run automatically upon 
 * NGServer shutdown, sending its output to the server's System.out.
 *
 * This is aliased by default to the command "ng-stats".
 *
 * @author Marty Lamb
 */
public class NGServerStats {

  public static void nailShutdown(NGServer server) {
    dumpStats(server, server.out);
  }

  public static void nailMain(NGContext context) {
    dumpStats(context.getNGServer(), context.out);
  }

  private static void dumpStats(NGServer server, java.io.PrintStream out) {
    Map stats = server.getNailStats();
    for (Iterator i = stats.values().iterator(); i.hasNext(); ) {
      out.println(i.next());
    }
  }
}