/*
* Copyright 2010 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.core.reteoo;
import java.io.Externalizable;
import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectOutput;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;
import org.drools.core.SessionConfiguration;
import org.drools.core.StatelessSession;
import org.drools.core.StatelessSessionResult;
import org.drools.core.base.MapGlobalResolver;
import org.drools.core.common.InternalFactHandle;
import org.drools.core.common.InternalRuleBase;
import org.drools.core.common.InternalStatelessSession;
import org.drools.core.common.InternalWorkingMemory;
import org.drools.core.event.*;
import org.drools.core.impl.EnvironmentFactory;
import org.drools.core.reteoo.ReteooWorkingMemory.WorkingMemoryReteAssertAction;
import org.drools.core.rule.EntryPoint;
import org.drools.core.spi.AgendaFilter;
import org.drools.core.spi.GlobalExporter;
import org.drools.core.spi.GlobalResolver;
public class ReteooStatelessSession
implements
StatelessSession,
InternalStatelessSession,
Externalizable {
//private WorkingMemory workingMemory;
private InternalRuleBase ruleBase;
private AgendaFilter agendaFilter;
private GlobalResolver globalResolver = new MapGlobalResolver();
private GlobalExporter globalExporter;
private SessionConfiguration sessionConf;
/** The eventSupport */
protected WorkingMemoryEventSupport workingMemoryEventSupport = new WorkingMemoryEventSupport();
protected AgendaEventSupport agendaEventSupport = new AgendaEventSupport();
final RuleEventListenerSupport ruleEventListenerSupport = new RuleEventListenerSupport();
public ReteooStatelessSession() {
}
public ReteooStatelessSession(final InternalRuleBase ruleBase) {
this.ruleBase = ruleBase;
this.sessionConf = SessionConfiguration.getDefaultInstance(); // create one of these and re-use
}
public void readExternal(ObjectInput in) throws IOException,
ClassNotFoundException {
ruleBase = (InternalRuleBase) in.readObject();
agendaFilter = (AgendaFilter) in.readObject();
globalResolver = (GlobalResolver) in.readObject();
globalExporter = (GlobalExporter) in.readObject();
this.sessionConf = SessionConfiguration.getDefaultInstance(); // create one of these and re-use
}
public void writeExternal(ObjectOutput out) throws IOException {
out.writeObject(ruleBase);
out.writeObject(agendaFilter);
out.writeObject(globalResolver);
out.writeObject(globalExporter);
}
public InternalRuleBase getRuleBase() {
return this.ruleBase;
}
public InternalWorkingMemory newWorkingMemory() {
this.ruleBase.readLock();
try {
InternalWorkingMemory wm = new ReteooWorkingMemory(this.ruleBase.nextWorkingMemoryCounter(),
this.ruleBase,
this.sessionConf,
EnvironmentFactory.newEnvironment(),
this.workingMemoryEventSupport,
this.agendaEventSupport,
this.ruleEventListenerSupport );
wm.setGlobalResolver( this.globalResolver );
final InternalFactHandle handle = wm.getFactHandleFactory().newFactHandle( InitialFactImpl.getInstance(),
wm.getObjectTypeConfigurationRegistry().getObjectTypeConf( EntryPoint.DEFAULT,
InitialFactImpl.getInstance() ),
wm,
wm);
wm.queueWorkingMemoryAction( new WorkingMemoryReteAssertAction( handle,
false,
true,
null,
null ) );
return wm;
} finally {
this.ruleBase.readUnlock();
}
}
public void addEventListener(final WorkingMemoryEventListener listener) {
this.workingMemoryEventSupport.addEventListener( listener );
}
public void removeEventListener(final WorkingMemoryEventListener listener) {
this.workingMemoryEventSupport.removeEventListener( listener );
}
public List getWorkingMemoryEventListeners() {
return this.workingMemoryEventSupport.getEventListeners();
}
public void addEventListener(final AgendaEventListener listener) {
this.agendaEventSupport.addEventListener( listener );
}
public void removeEventListener(final AgendaEventListener listener) {
this.agendaEventSupport.removeEventListener( listener );
}
public List getAgendaEventListeners() {
return this.agendaEventSupport.getEventListeners();
}
public void addEventListener(RuleBaseEventListener listener) {
this.ruleBase.addEventListener( listener );
}
public List getRuleBaseEventListeners() {
return this.ruleBase.getRuleBaseEventListeners();
}
public void removeEventListener(RuleBaseEventListener listener) {
this.ruleBase.removeEventListener( listener );
}
public void setAgendaFilter(AgendaFilter agendaFilter) {
this.agendaFilter = agendaFilter;
}
public void setGlobal(String identifier,
Object value) {
this.globalResolver.setGlobal( identifier,
value );
}
public void setGlobalResolver(GlobalResolver globalResolver) {
this.globalResolver = globalResolver;
}
public void setGlobalExporter(GlobalExporter globalExporter) {
this.globalExporter = globalExporter;
}
public void execute(Object object) {
InternalWorkingMemory wm = newWorkingMemory();
wm.insert( object );
wm.fireAllRules( this.agendaFilter );
}
public void execute(Object[] array) {
InternalWorkingMemory wm = newWorkingMemory();
for ( int i = 0, length = array.length; i < length; i++ ) {
wm.insert( array[i] );
}
wm.fireAllRules( this.agendaFilter );
}
public void execute(Collection collection) {
InternalWorkingMemory wm = newWorkingMemory();
for ( Iterator it = collection.iterator(); it.hasNext(); ) {
wm.insert( it.next() );
}
wm.fireAllRules( this.agendaFilter );
}
public StatelessSessionResult executeWithResults(Object object) {
InternalWorkingMemory wm = newWorkingMemory();
wm.insert( object );
wm.fireAllRules( this.agendaFilter );
GlobalResolver globalResolver = null;
if ( this.globalExporter != null ) {
globalResolver = this.globalExporter.export( wm );
}
return new ReteStatelessSessionResult( wm,
globalResolver );
}
public StatelessSessionResult executeWithResults(Object[] array) {
InternalWorkingMemory wm = newWorkingMemory();
for ( int i = 0, length = array.length; i < length; i++ ) {
wm.insert( array[i] );
}
wm.fireAllRules( this.agendaFilter );
GlobalResolver globalResolver = null;
if ( this.globalExporter != null ) {
globalResolver = this.globalExporter.export( wm );
}
return new ReteStatelessSessionResult( wm,
globalResolver );
}
public StatelessSessionResult executeWithResults(Collection collection) {
InternalWorkingMemory wm = newWorkingMemory();
for ( Iterator it = collection.iterator(); it.hasNext(); ) {
wm.insert( it.next() );
}
wm.fireAllRules( this.agendaFilter );
GlobalResolver globalResolver = null;
if ( this.globalExporter != null ) {
globalResolver = this.globalExporter.export( wm );
}
return new ReteStatelessSessionResult( wm,
globalResolver );
}
}