org.drools.core.common.AbstractFactHandleFactory Maven / Gradle / Ivy
/*
* Copyright 2005 Red Hat, Inc. and/or its affiliates.
*
* 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.common;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.concurrent.atomic.AtomicLong;
import org.drools.core.WorkingMemoryEntryPoint;
import org.drools.core.reteoo.ObjectTypeConf;
import org.drools.core.spi.FactHandleFactory;
public abstract class AbstractFactHandleFactory
implements
FactHandleFactory {
/** The fact id. */
private AtomicInteger id;
/** The number of facts created - used for recency. */
private AtomicLong counter;
public AbstractFactHandleFactory() {
// starts at 0. So first assigned is 1.
// 0 is hard coded to Initialfact
this.id = new AtomicInteger(0);
this.counter = new AtomicLong(0);
}
public AbstractFactHandleFactory(int id, long counter) {
this.id = new AtomicInteger( id );
this.counter = new AtomicLong( counter );
}
/* (non-Javadoc)
* @see org.kie.reteoo.FactHandleFactory#newFactHandle()
*/
public final InternalFactHandle newFactHandle(Object object,
ObjectTypeConf conf,
InternalWorkingMemory workingMemory,
WorkingMemoryEntryPoint wmEntryPoint) {
return newFactHandle( getNextId(),
object,
conf,
workingMemory,
wmEntryPoint );
}
/* (non-Javadoc)
* @see org.kie.reteoo.FactHandleFactory#newFactHandle(long)
*/
public final InternalFactHandle newFactHandle(int id,
Object object,
ObjectTypeConf conf,
InternalWorkingMemory workingMemory,
WorkingMemoryEntryPoint wmEntryPoint) {
return newFactHandle( id,
object,
getNextRecency(),
conf,
workingMemory,
wmEntryPoint );
}
/* (non-Javadoc)
* @see org.kie.reteoo.FactHandleFactory#newFactHandle(long)
*/
public abstract InternalFactHandle newFactHandle(int id,
Object object,
long recency,
ObjectTypeConf conf,
InternalWorkingMemory workingMemory,
WorkingMemoryEntryPoint wmEntryPoint );
public final void increaseFactHandleRecency(final InternalFactHandle factHandle) {
factHandle.setRecency( getNextRecency() );
}
public void destroyFactHandle(final InternalFactHandle factHandle) {
factHandle.invalidate();
}
/* (non-Javadoc)
* @see org.kie.reteoo.FactHandleFactory#newInstance()
*/
public abstract FactHandleFactory newInstance();
public int getNextId() {
return this.id.incrementAndGet();
}
public long getNextRecency() {
return this.counter.incrementAndGet();
}
public int getId() {
return this.id.get();
}
public long getRecency() {
return this.counter.get();
}
public void clear(int id, long counter) {
this.id = new AtomicInteger( id );
this.counter = new AtomicLong( counter );
}
public void reset() {
id.set(0);
counter.set(0);
}
}