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Syslog4j provides client and server implementations of the BSD Syslog protocol (RFC 3164) and the structured syslog" protocol (RFC5424).
/**
*
* (C) Copyright 2008-2011 syslog4j.org
*
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the GNU Lesser General Public License
* (LGPL) version 2.1 which accompanies this distribution, and is available at
* http://www.gnu.org/licenses/lgpl-2.1.html
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*/
package com.nesscomputing.syslog4j.server.impl;
import java.net.DatagramPacket;
import java.net.InetAddress;
import java.net.Socket;
import java.net.SocketAddress;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import org.apache.log4j.Logger;
import com.google.common.collect.Maps;
import com.nesscomputing.syslog4j.SyslogCharSetIF;
import com.nesscomputing.syslog4j.SyslogRuntimeException;
import com.nesscomputing.syslog4j.server.SyslogServerConfigIF;
import com.nesscomputing.syslog4j.server.SyslogServerEventHandlerIF;
import com.nesscomputing.syslog4j.server.SyslogServerEventIF;
import com.nesscomputing.syslog4j.server.SyslogServerIF;
import com.nesscomputing.syslog4j.server.SyslogServerSessionEventHandlerIF;
import com.nesscomputing.syslog4j.server.SyslogServerSessionlessEventHandlerIF;
import com.nesscomputing.syslog4j.server.impl.event.SyslogServerEvent;
import com.nesscomputing.syslog4j.server.impl.event.structured.StructuredSyslogServerEvent;
import com.nesscomputing.syslog4j.util.SyslogUtility;
/**
* AbstractSyslogServer provides a base abstract implementation of the SyslogServerIF.
*
* Syslog4j is licensed under the Lesser GNU Public License v2.1. A copy
* of the LGPL license is available in the META-INF folder in all
* distributions of Syslog4j and in the base directory of the "doc" ZIP.
*
* @author <[email protected]>
* @version $Id: AbstractSyslogServer.java,v 1.12 2011/01/11 05:11:13 cvs Exp $
*/
public abstract class AbstractSyslogServer implements SyslogServerIF {
private static final Logger LOG = Logger.getLogger(AbstractSyslogServer.class);
public static class Sessions extends HashMap> {
public static final Object syncObject = new Object();
public void addSocket(Socket socket) {
synchronized(syncObject) {
put(socket,new HashMap());
}
}
public Iterator getSockets() {
if (size() > 0) {
return keySet().iterator();
} else {
return null;
}
}
public void addSession(Socket socket, SyslogServerEventHandlerIF eventHandler, Object session) {
synchronized(syncObject) {
Map handlerMap = getHandlerMap(socket);
if (handlerMap == null) {
handlerMap = Maps.newHashMap();
}
handlerMap.put(eventHandler,session);
}
}
public void removeSocket(Socket socket) {
synchronized(syncObject) {
Map handlerMap = getHandlerMap(socket);
if (handlerMap != null) {
handlerMap.clear();
}
}
}
protected Map getHandlerMap(Socket socket) {
Map handlerMap = null;
if (containsKey(socket)) {
handlerMap = get(socket);
}
return handlerMap;
}
public Object getSession(Socket socket, SyslogServerEventHandlerIF eventHandler) {
synchronized(syncObject) {
Map handlerMap = getHandlerMap(socket);
Object session = handlerMap.get(eventHandler);
return session;
}
}
}
protected String syslogProtocol = null;
protected AbstractSyslogServerConfig syslogServerConfig = null;
private Thread thread = null;
protected boolean shutdown = false;
public void initialize(String protocol, SyslogServerConfigIF config) throws SyslogRuntimeException {
this.syslogProtocol = protocol;
try {
this.syslogServerConfig = (AbstractSyslogServerConfig) config;
} catch (ClassCastException cce) {
throw new SyslogRuntimeException(cce);
}
initialize();
}
public String getProtocol() {
return this.syslogProtocol;
}
public SyslogServerConfigIF getConfig() {
return this.syslogServerConfig;
}
protected abstract void initialize() throws SyslogRuntimeException;
public void shutdown() throws SyslogRuntimeException {
this.shutdown = true;
}
public synchronized Thread getThread() {
return this.thread;
}
public synchronized void setThread(Thread thread) {
this.thread = thread;
}
protected synchronized void interruptThread()
{
if (this.thread != null) {
this.thread.interrupt();
this.thread = null;
}
}
protected static boolean isStructuredMessage(SyslogCharSetIF syslogCharSet, byte[] receiveData) {
String receiveDataString = SyslogUtility.newString(syslogCharSet, receiveData);
boolean isStructuredMessage = isStructuredMessage(syslogCharSet,receiveDataString);
return isStructuredMessage;
}
protected static boolean isStructuredMessage(SyslogCharSetIF syslogCharSet, String receiveData) {
int idx = receiveData.indexOf('>');
if (idx != -1 && ((receiveData.length() > idx + 1 && Character.isDigit(receiveData.charAt(idx + 1))))) {
return true;
}
return false;
}
protected static SyslogServerEventIF createEvent(SyslogServerConfigIF serverConfig, byte[] lineBytes, int lineBytesLength, InetAddress inetAddr) {
SyslogServerEventIF event = null;
if (serverConfig.isUseStructuredData() && AbstractSyslogServer.isStructuredMessage(serverConfig,lineBytes)) {
event = new StructuredSyslogServerEvent(lineBytes,lineBytesLength,inetAddr);
if (serverConfig.getDateTimeFormatter() != null) {
((StructuredSyslogServerEvent) event).setDateTimeFormatter(serverConfig.getDateTimeFormatter());
}
} else {
event = new SyslogServerEvent(lineBytes,lineBytesLength,inetAddr);
}
return event;
}
protected static SyslogServerEventIF createEvent(SyslogServerConfigIF serverConfig, String line, InetAddress inetAddr) {
SyslogServerEventIF event = null;
if (serverConfig.isUseStructuredData() && AbstractSyslogServer.isStructuredMessage(serverConfig,line)) {
event = new StructuredSyslogServerEvent(line,inetAddr);
} else {
event = new SyslogServerEvent(line,inetAddr);
}
return event;
}
public static void handleInitialize(SyslogServerIF syslogServer) {
List eventHandlers = syslogServer.getConfig().getEventHandlers();
for(int i=0; i eventHandlers = syslogServer.getConfig().getEventHandlers();
for(int i=0; i eventHandlers = syslogServer.getConfig().getEventHandlers();
for(int i=0; i eventHandlers = syslogServer.getConfig().getEventHandlers();
for(int i=0; i eventHandlers = syslogServer.getConfig().getEventHandlers();
for(int i=0; i eventHandlers = syslogServer.getConfig().getEventHandlers();
for(int i=0; i