Java tutorial
/** * * (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.event; import java.net.InetAddress; import java.nio.charset.Charset; import java.text.DateFormat; import java.text.ParseException; import java.text.SimpleDateFormat; import java.util.Calendar; import java.util.Date; import org.apache.commons.lang3.StringUtils; import org.apache.log4j.Logger; import com.google.common.base.Charsets; import com.nesscomputing.syslog4j.SyslogFacility; import com.nesscomputing.syslog4j.SyslogLevel; import com.nesscomputing.syslog4j.server.SyslogServerEventIF; import com.nesscomputing.syslog4j.util.SyslogUtility; import edu.umd.cs.findbugs.annotations.SuppressFBWarnings; /** * SyslogServerEvent provides an implementation of the SyslogServerEventIF interface. * * <p>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.</p> * * @author <syslog4j@productivity.org> * @version $Id: SyslogServerEvent.java,v 1.9 2011/01/11 06:21:15 cvs Exp $ */ public class SyslogServerEvent implements SyslogServerEventIF { private static final Logger LOG = Logger.getLogger(SyslogServerEvent.class); public static final String DATE_FORMAT = "MMM dd HH:mm:ss yyyy"; protected Charset charSet = Charsets.UTF_8; protected String rawString = null; protected byte[] rawBytes = null; protected int rawLength = -1; protected Date date = null; protected SyslogLevel level = SyslogLevel.INFO; protected SyslogFacility facility = SyslogFacility.user; protected String host = null; protected boolean isHostStrippedFromMessage = false; protected String message = null; protected InetAddress inetAddress = null; public SyslogServerEvent(final String message, InetAddress inetAddress) { initialize(message, inetAddress); } public SyslogServerEvent(final byte[] message, int length, InetAddress inetAddress) { initialize(message, length, inetAddress); } protected void initialize(final String message, InetAddress inetAddress) { this.rawString = message; this.rawLength = message.length(); this.inetAddress = inetAddress; this.message = message; parse(); } protected void initialize(final byte[] message, int length, InetAddress inetAddress) { this.rawBytes = message; this.rawLength = length; this.inetAddress = inetAddress; this.message = SyslogUtility.newString(this, this.rawBytes, this.rawLength); parse(); } protected void parseHost() { int i = this.message.indexOf(' '); if (i > -1) { String hostAddress = null; String hostName = null; String providedHost = StringUtils.trimToEmpty(this.message.substring(0, i)); hostAddress = this.inetAddress.getHostAddress(); if (providedHost.equalsIgnoreCase(hostAddress)) { this.host = hostAddress; this.message = this.message.substring(i + 1); isHostStrippedFromMessage = true; } if (this.host == null) { hostName = this.inetAddress.getHostName(); if (!hostName.equalsIgnoreCase(hostAddress)) { if (providedHost.equalsIgnoreCase(hostName)) { this.host = hostName; this.message = this.message.substring(i + 1); isHostStrippedFromMessage = true; } if (this.host == null) { int j = hostName.indexOf('.'); if (j > -1) { hostName = hostName.substring(0, j); } if (providedHost.equalsIgnoreCase(hostName)) { this.host = hostName; this.message = this.message.substring(i + 1); isHostStrippedFromMessage = true; } } } } if (this.host == null) { this.host = (hostName != null) ? hostName : hostAddress; } } } protected void parseDate() { if (this.message.length() >= 16 && this.message.charAt(3) == ' ' && this.message.charAt(6) == ' ') { String year = Integer.toString(Calendar.getInstance().get(Calendar.YEAR)); String originalDate = this.message.substring(0, 15) + " " + year; DateFormat dateFormat = new SimpleDateFormat(DATE_FORMAT); try { this.date = dateFormat.parse(originalDate); this.message = this.message.substring(16); } catch (ParseException pe) { this.date = new Date(); } } } protected void parsePriority() { if (this.message.charAt(0) == '<') { int i = this.message.indexOf(">"); if (i <= 4 && i > -1) { String priorityStr = this.message.substring(1, i); int priority = 0; try { priority = Integer.parseInt(priorityStr); this.facility = SyslogFacility.forValue(priority >> 3); this.level = SyslogLevel.values()[priority & 7]; this.message = this.message.substring(i + 1); } catch (NumberFormatException nfe) { LOG.trace("While parsing priority", nfe); } } } } protected void parse() { parsePriority(); parseDate(); parseHost(); } public SyslogFacility getFacility() { return this.facility; } public void setFacility(SyslogFacility facility) { this.facility = facility; } @SuppressFBWarnings("EI_EXPOSE_REP") public byte[] getRaw() { if (this.rawString != null) { byte[] rawStringBytes = SyslogUtility.getBytes(this, this.rawString); return rawStringBytes; } else if (this.rawBytes.length == this.rawLength) { return this.rawBytes; } else { byte[] newRawBytes = new byte[this.rawLength]; System.arraycopy(this.rawBytes, 0, newRawBytes, 0, this.rawLength); return newRawBytes; } } public int getRawLength() { return this.rawLength; } @SuppressFBWarnings("EI_EXPOSE_REP") public Date getDate() { return this.date; } @SuppressFBWarnings("EI_EXPOSE_REP2") public void setDate(Date date) { this.date = date; } public SyslogLevel getLevel() { return this.level; } public void setLevel(SyslogLevel level) { this.level = level; } public String getHost() { return this.host; } public void setHost(String host) { this.host = host; } public boolean isHostStrippedFromMessage() { return isHostStrippedFromMessage; } public String getMessage() { return this.message; } public void setMessage(String message) { this.message = message; } @Override public Charset getCharSet() { return this.charSet; } @Override public void setCharSet(Charset charSet) { this.charSet = charSet; } }