/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.isis.core.runtime.system.persistence;
import java.util.Map;
import javax.jdo.listener.AttachLifecycleListener;
import javax.jdo.listener.ClearLifecycleListener;
import javax.jdo.listener.CreateLifecycleListener;
import javax.jdo.listener.DeleteLifecycleListener;
import javax.jdo.listener.DetachLifecycleListener;
import javax.jdo.listener.DirtyLifecycleListener;
import javax.jdo.listener.InstanceLifecycleEvent;
import javax.jdo.listener.LoadLifecycleListener;
import javax.jdo.listener.StoreLifecycleListener;
import com.google.common.collect.Maps;
import org.datanucleus.enhancement.Persistable;
import org.apache.isis.core.metamodel.adapter.ObjectAdapter;
import org.apache.isis.core.metamodel.adapter.mgr.AdapterManagerBase;
public class IsisLifecycleListener2
implements AttachLifecycleListener, ClearLifecycleListener, CreateLifecycleListener, DeleteLifecycleListener,
DetachLifecycleListener, DirtyLifecycleListener, LoadLifecycleListener, StoreLifecycleListener,
SuspendableListener {
/**
* The internal contract between PersistenceSession and this class.
*/
interface PersistenceSessionLifecycleManagement extends AdapterManagerBase {
void ensureRootObject(Persistable pojo);
void initializeMapAndCheckConcurrency(Persistable pojo);
void enlistCreatedAndRemapIfRequiredThenInvokeIsisInvokePersistingOrUpdatedCallback(Persistable pojo);
void invokeIsisPersistingCallback(Persistable pojo);
void enlistUpdatingAndInvokeIsisUpdatingCallback(Persistable pojo);
void enlistDeletingAndInvokeIsisRemovingCallbackFacet(Persistable pojo);
}
private final PersistenceSessionLifecycleManagement persistenceSession;
public IsisLifecycleListener2(final PersistenceSessionLifecycleManagement persistenceSession) {
this.persistenceSession = persistenceSession;
}
/////////////////////////////////////////////////////////////////////////
// callbacks
/////////////////////////////////////////////////////////////////////////
@Override
public void postCreate(final InstanceLifecycleEvent event) {
// no-op
}
@Override
public void preAttach(final InstanceLifecycleEvent event) {
final Persistable pojo = Utils.persistenceCapableFor(event);
persistenceSession.ensureRootObject(pojo);
}
@Override
public void postAttach(final InstanceLifecycleEvent event) {
final Persistable pojo = Utils.persistenceCapableFor(event);
persistenceSession.ensureRootObject(pojo);
}
@Override
public void postLoad(final InstanceLifecycleEvent event) {
final Persistable pojo = Utils.persistenceCapableFor(event);
persistenceSession.initializeMapAndCheckConcurrency(pojo);
}
@Override
public void preStore(InstanceLifecycleEvent event) {
final Persistable pojo = Utils.persistenceCapableFor(event);
persistenceSession.invokeIsisPersistingCallback(pojo);
}
@Override
public void postStore(InstanceLifecycleEvent event) {
final Persistable pojo = Utils.persistenceCapableFor(event);
persistenceSession.enlistCreatedAndRemapIfRequiredThenInvokeIsisInvokePersistingOrUpdatedCallback(pojo);
}
@Override
public void preDirty(InstanceLifecycleEvent event) {
final Persistable pojo = Utils.persistenceCapableFor(event);
persistenceSession.enlistUpdatingAndInvokeIsisUpdatingCallback(pojo);
}
@Override
public void postDirty(InstanceLifecycleEvent event) {
// cannot assert on the frameworks being in agreement, due to the scenario documented
// in the FrameworkSynchronizer#preDirtyProcessing(...)
//
// 1<->m bidirectional, persistence-by-reachability
// no-op
}
@Override
public void preDelete(InstanceLifecycleEvent event) {
final Persistable pojo = Utils.persistenceCapableFor(event);
persistenceSession.enlistDeletingAndInvokeIsisRemovingCallbackFacet(pojo);
}
@Override
public void postDelete(InstanceLifecycleEvent event) {
// previously we called the PersistenceSession to invoke the removed callback (if any).
// however, this is almost certainly incorrect, because DN will not allow us
// to "touch" the pojo once deleted.
//
// CallbackFacet.Util.callCallback(adapter, RemovedCallbackFacet.class);
}
/**
* Does nothing, not important event for Isis to track.
*/
@Override
public void preClear(InstanceLifecycleEvent event) {
// ignoring, not important to us
}
/**
* Does nothing, not important event for Isis to track.
*/
@Override
public void postClear(InstanceLifecycleEvent event) {
// ignoring, not important to us
}
@Override
public void preDetach(InstanceLifecycleEvent event) {
final Persistable pojo = Utils.persistenceCapableFor(event);
persistenceSession.ensureRootObject(pojo);
}
@Override
public void postDetach(InstanceLifecycleEvent event) {
final Persistable pojo = Utils.persistenceCapableFor(event);
persistenceSession.ensureRootObject(pojo);
}
// /////////////////////////////////////////////////////////
// SuspendListener
// /////////////////////////////////////////////////////////
private boolean suspended;
@Override
public boolean isSuspended() {
return suspended;
}
@Override
public void setSuspended(boolean suspended) {
this.suspended = suspended;
}
// /////////////////////////////////////////////////////////
// Logging
// /////////////////////////////////////////////////////////
private enum Phase {
PRE, POST
}
private static Map<Integer, LifecycleEventType> events = Maps.newHashMap();
private enum LifecycleEventType {
CREATE(0), LOAD(1), STORE(2), CLEAR(3), DELETE(4), DIRTY(5), DETACH(6), ATTACH(7);
private LifecycleEventType(int code) {
events.put(code, this);
}
public static LifecycleEventType lookup(int code) {
return events.get(code);
}
}
private String logString(Phase phase, LoggingLocation location, InstanceLifecycleEvent event) {
final Persistable pojo = Utils.persistenceCapableFor(event);
final ObjectAdapter adapter = persistenceSession.getAdapterFor(pojo);
return phase + " " + location.prefix + " " + LifecycleEventType.lookup(event.getEventType()) + ": oid=" + (adapter !=null? adapter.getOid(): "(null)") + " ,pojo " + pojo;
}
}