/**
* Copyright 2005 JBoss 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 org.drools.audit;
import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectOutput;
import java.io.ObjectOutputStream;
import java.io.StringWriter;
import java.util.ArrayList;
import java.util.List;
import org.drools.WorkingMemory;
import org.drools.audit.event.LogEvent;
import org.drools.event.KnowledgeRuntimeEventManager;
import com.thoughtworks.xstream.XStream;
/**
* A logger of events generated by a working memory.
* It stores its information in memory, so it can be retrieved later.
*
* @author <a href="mailto:kris_verlaenen@hotmail.com">Kris Verlaenen </a>
*/
public class WorkingMemoryInMemoryLogger extends WorkingMemoryLogger {
private List<LogEvent> events = new ArrayList<LogEvent>();
public WorkingMemoryInMemoryLogger() {
}
public WorkingMemoryInMemoryLogger(final WorkingMemory workingMemory) {
super( workingMemory );
}
public WorkingMemoryInMemoryLogger(final KnowledgeRuntimeEventManager session) {
super( session );
}
@SuppressWarnings("unchecked")
public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException {
super.readExternal(in);
events = (List<LogEvent>) in.readObject();
}
public void writeExternal(ObjectOutput out) throws IOException {
super.writeExternal(out);
out.writeObject(events);
}
public String getEvents() {
final XStream xstream = new XStream();
StringWriter writer = new StringWriter();
try {
final ObjectOutputStream out = xstream.createObjectOutputStream(writer);
out.writeObject( this.events );
out.close();
} catch (Throwable t) {
throw new RuntimeException("Unable to create event output: " + t.getMessage());
}
return writer.toString();
}
/**
* Clears all the events in the log.
*/
public void clear() {
this.events.clear();
}
/**
* @see org.drools.audit.WorkingMemoryLogger
*/
public void logEventCreated(final LogEvent logEvent) {
this.events.add( logEvent );
}
public List<LogEvent> getLogEvents() {
return this.events;
}
}