All Downloads are FREE. Search and download functionalities are using the official Maven repository.

org.apache.log4j.varia.Roller Maven / Gradle / Ivy

There is a newer version: 6.1.3
Show newest version
/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.apache.log4j.varia;

import org.apache.log4j.Logger;
import org.apache.log4j.BasicConfigurator;

import java.io.IOException;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.net.Socket;

/**
   A simple application to send roll over messages to a potentially
   remote {@link ExternallyRolledFileAppender}. 

   

It takes two arguments, the host_name and port_number where the ExternallyRolledFileAppender is listening. @author Ceki Gülcü @since version 0.9.0 */ public class Roller { static Logger cat = Logger.getLogger(Roller.class); static String host; static int port; // Static class. Roller() { } /** Send a "RollOver" message to ExternallyRolledFileAppender on host and port. */ public static void main(String argv[]) { BasicConfigurator.configure(); if(argv.length == 2) init(argv[0], argv[1]); else usage("Wrong number of arguments."); roll(); } static void usage(String msg) { System.err.println(msg); System.err.println( "Usage: java " + Roller.class.getName() + "host_name port_number"); System.exit(1); } static void init(String hostArg, String portArg) { host = hostArg; try { port = Integer.parseInt(portArg); } catch(java.lang.NumberFormatException e) { usage("Second argument "+portArg+" is not a valid integer."); } } static void roll() { try { Socket socket = new Socket(host, port); DataOutputStream dos = new DataOutputStream(socket.getOutputStream()); DataInputStream dis = new DataInputStream(socket.getInputStream()); dos.writeUTF(ExternallyRolledFileAppender.ROLL_OVER); String rc = dis.readUTF(); if(ExternallyRolledFileAppender.OK.equals(rc)) { cat.info("Roll over signal acknowledged by remote appender."); } else { cat.warn("Unexpected return code "+rc+" from remote entity."); System.exit(2); } } catch(IOException e) { cat.error("Could not send roll signal on host "+host+" port "+port+" .", e); System.exit(2); } System.exit(0); } }





© 2015 - 2024 Weber Informatics LLC | Privacy Policy