/*
* RHQ Management Platform
* Copyright (C) 2005-2008 Red Hat, Inc.
* All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation version 2 of the License.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
package org.rhq.plugins.platform;
import java.io.BufferedReader;
import java.io.File;
import java.io.IOException;
import java.util.LinkedHashSet;
import java.util.Set;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.rhq.core.domain.configuration.PropertyMap;
import org.rhq.core.domain.event.Event;
import org.rhq.core.pluginapi.event.EventContext;
import org.rhq.core.pluginapi.event.log.LogEntryProcessor;
import org.rhq.core.pluginapi.event.log.LogFileEventPoller;
import org.rhq.core.pluginapi.inventory.ResourceContext;
/**
* Reads syslog messages from a file.
*
* @author John Mazzitelli
*/
public class SyslogFileEventLogDelegate extends SyslogProcessor implements LogEntryProcessor {
private final Log log = LogFactory.getLog(SyslogFileEventLogDelegate.class);
private String file;
private LogFileEventPoller poller;
public SyslogFileEventLogDelegate(ResourceContext resourceContext, PropertyMap logProperties) {
super(resourceContext, logProperties, getFileFromPropertyMap(logProperties));
this.file = getFileFromPropertyMap(logProperties);
try {
this.poller = new LogFileEventPoller(getEventContext(), EVENT_LOG_TYPE, new File(this.file), this);
getEventContext().registerEventPoller(this.poller, EventContext.MINIMUM_POLLING_INTERVAL,
this.poller.getSourceLocation());
} catch (Exception e) {
log.error("Failed attempt to setup syslog file poller. Cannot process syslog messages.", e);
}
}
private static String getFileFromPropertyMap(PropertyMap logProperties) {
return logProperties.getSimpleValue(LinuxPlatformComponent.PLUGIN_CONFIG_EVENT_TRACKING_FILE_PATH,
"/var/log/messages");
}
public void shutdown() {
if (this.poller != null) {
getEventContext().unregisterEventPoller(this.poller.getEventType(), this.poller.getSourceLocation());
}
return;
}
public Set<Event> processLines(BufferedReader bufferedReader) throws IOException {
// Use a LinkedHashSet so the Events are in the same order as the log entries they correspond to.
Set<Event> events = new LinkedHashSet<Event>();
String line;
while ((line = bufferedReader.readLine()) != null) {
Event event = convertLine(line);
if (event != null) {
events.add(event);
}
}
return events;
}
}