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org.glassfish.hk2.configuration.hub.internal.WriteableBeanDatabaseImpl Maven / Gradle / Ivy
/*
* Copyright (c) 2014, 2018 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0, which is available at
* http://www.eclipse.org/legal/epl-2.0.
*
* This Source Code may also be made available under the following Secondary
* Licenses when the conditions for such availability set forth in the
* Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
* version 2 with the GNU Classpath Exception, which is available at
* https://www.gnu.org/software/classpath/license.html.
*
* SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
*/
package org.glassfish.hk2.configuration.hub.internal;
import java.io.PrintStream;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.LinkedList;
import java.util.Map;
import java.util.Set;
import org.glassfish.hk2.api.MultiException;
import org.glassfish.hk2.api.TwoPhaseResource;
import org.glassfish.hk2.api.TwoPhaseTransactionData;
import org.glassfish.hk2.configuration.hub.api.BeanDatabaseUpdateListener;
import org.glassfish.hk2.configuration.hub.api.Change;
import org.glassfish.hk2.configuration.hub.api.Instance;
import org.glassfish.hk2.configuration.hub.api.Type;
import org.glassfish.hk2.configuration.hub.api.WriteableBeanDatabase;
import org.glassfish.hk2.configuration.hub.api.WriteableType;
/**
* @author jwells
*
*/
public class WriteableBeanDatabaseImpl implements WriteableBeanDatabase {
private final long baseRevision;
private final HashMap types = new HashMap();
private final HubImpl hub;
private final TwoPhaseResourceImpl resource = new TwoPhaseResourceImpl();
private final LinkedList changes = new LinkedList();
private final LinkedList removedTypes = new LinkedList();
private boolean committed = false;
private Object commitMessage = null;
/* package */ WriteableBeanDatabaseImpl(HubImpl hub, BeanDatabaseImpl currentDatabase) {
this.hub = hub;
baseRevision = currentDatabase.getRevision();
for (Type type : currentDatabase.getAllTypes()) {
types.put(type.getName(), new WriteableTypeImpl(this, (TypeImpl) type));
}
}
/* (non-Javadoc)
* @see org.glassfish.hk2.configuration.hub.api.BeanDatabase#getAllTypes()
*/
@Override
public synchronized Set getAllTypes() {
return Collections.unmodifiableSet(new HashSet(types.values()));
}
/* (non-Javadoc)
* @see org.glassfish.hk2.configuration.hub.api.WriteableBeanDatabase#getAllWriteableTypes()
*/
@Override
public Set getAllWriteableTypes() {
return Collections.unmodifiableSet(new HashSet(types.values()));
}
/* (non-Javadoc)
* @see org.glassfish.hk2.configuration.hub.api.BeanDatabase#getType(java.lang.String)
*/
@Override
public synchronized Type getType(String type) {
return types.get(type);
}
/* (non-Javadoc)
* @see org.glassfish.hk2.configuration.hub.api.BeanDatabase#getInstance(java.lang.String, java.lang.Object)
*/
@Override
public synchronized Instance getInstance(String type, String instanceKey) {
Type t = getType(type);
if (t == null) return null;
return t.getInstance(instanceKey);
}
private void checkState() {
if (committed) throw new IllegalStateException("This database has already been committed");
}
/* (non-Javadoc)
* @see org.glassfish.hk2.configuration.hub.api.WriteableBeanDatabase#addType(java.lang.String)
*/
@Override
public synchronized WriteableType addType(String typeName) {
if (typeName == null) throw new IllegalArgumentException();
checkState();
WriteableTypeImpl wti = new WriteableTypeImpl(this, typeName);
changes.add(new ChangeImpl(Change.ChangeCategory.ADD_TYPE,
wti,
null,
null,
null,
null));
types.put(typeName, wti);
return wti;
}
/* (non-Javadoc)
* @see org.glassfish.hk2.configuration.hub.api.WriteableBeanDatabase#removeType(java.lang.String)
*/
@Override
public synchronized Type removeType(String typeName) {
if (typeName == null) throw new IllegalArgumentException();
checkState();
WriteableTypeImpl retVal = types.remove(typeName);
if (retVal == null) return null;
Map instances = retVal.getInstances();
for (String key : new HashSet(instances.keySet())) {
retVal.removeInstance(key);
}
changes.add(new ChangeImpl(Change.ChangeCategory.REMOVE_TYPE,
retVal,
null,
null,
null,
null));
removedTypes.add(retVal);
return retVal;
}
/* (non-Javadoc)
* @see org.glassfish.hk2.configuration.hub.api.WriteableBeanDatabase#getWriteableType(java.lang.String)
*/
@Override
public synchronized WriteableType getWriteableType(String typeName) {
checkState();
return types.get(typeName);
}
/* (non-Javadoc)
* @see org.glassfish.hk2.configuration.hub.api.WriteableBeanDatabase#findOrAddWriteableType(java.lang.String)
*/
@Override
public synchronized WriteableType findOrAddWriteableType(String typeName) {
if (typeName == null) throw new IllegalArgumentException();
checkState();
WriteableTypeImpl wti = types.get(typeName);
if (wti == null) {
return addType(typeName);
}
return wti;
}
/* (non-Javadoc)
* @see org.glassfish.hk2.configuration.hub.api.WriteableBeanDatabase#commit()
*/
@Override
public void commit() {
Object defaultCommit;
synchronized (this) {
defaultCommit = commitMessage;
}
commit(defaultCommit);
}
/* (non-Javadoc)
* @see org.glassfish.hk2.configuration.hub.api.WriteableBeanDatabase#commit()
*/
@Override
public void commit(Object commitMessage) {
synchronized (this) {
checkState();
committed = true;
}
// Outside of lock
hub.setCurrentDatabase(this, commitMessage, changes);
for (WriteableTypeImpl removedType : removedTypes) {
removedType.getHelper().dispose();
}
removedTypes.clear();
}
/* package */ long getBaseRevision() {
return baseRevision;
}
/* package */ synchronized void addChange(Change change) {
changes.add(change);
}
/* (non-Javadoc)
* @see org.glassfish.hk2.configuration.hub.api.BeanDatabase#dumpDatabase()
*/
@Override
public void dumpDatabase() {
dumpDatabase(System.err);
}
/* (non-Javadoc)
* @see org.glassfish.hk2.configuration.hub.api.BeanDatabase#dumpDatabase(java.io.PrintStream)
*/
@Override
public synchronized void dumpDatabase(PrintStream output) {
Utilities.dumpDatabase(this, output);
}
/* (non-Javadoc)
* @see org.glassfish.hk2.configuration.hub.api.BeanDatabase#dumpDatabaseAsString()
*/
@Override
public String dumpDatabaseAsString() {
return Utilities.dumpDatabaseAsString(this);
}
/* (non-Javadoc)
* @see org.glassfish.hk2.configuration.hub.api.WriteableBeanDatabase#getTwoPhaseResource()
*/
@Override
public TwoPhaseResource getTwoPhaseResource() {
return resource;
}
/* (non-Javadoc)
* @see org.glassfish.hk2.configuration.hub.api.WriteableBeanDatabase#getCommitMessage()
*/
@Override
public synchronized Object getCommitMessage() {
return commitMessage;
}
/* (non-Javadoc)
* @see org.glassfish.hk2.configuration.hub.api.WriteableBeanDatabase#setCommitMessage(java.lang.Object)
*/
@Override
public synchronized void setCommitMessage(Object commitMessage) {
this.commitMessage = commitMessage;
}
private class TwoPhaseResourceImpl implements TwoPhaseResource {
private LinkedList completedListeners;
/* (non-Javadoc)
* @see org.glassfish.hk2.api.TwoPhaseResource#prepareDynamicConfiguration(org.glassfish.hk2.api.TwoPhaseTransactionData)
*/
@Override
public void prepareDynamicConfiguration(
TwoPhaseTransactionData dynamicConfiguration)
throws MultiException {
Object defaultCommit;
synchronized (WriteableBeanDatabaseImpl.this) {
checkState();
committed = true;
defaultCommit = commitMessage;
}
// Outside of lock
completedListeners = hub.prepareCurrentDatabase(WriteableBeanDatabaseImpl.this, defaultCommit, changes);
}
/* (non-Javadoc)
* @see org.glassfish.hk2.api.TwoPhaseResource#activateDynamicConfiguration(org.glassfish.hk2.api.TwoPhaseTransactionData)
*/
@Override
public void activateDynamicConfiguration(
TwoPhaseTransactionData dynamicConfiguration) {
LinkedList completedListeners = this.completedListeners;
this.completedListeners = null;
Object defaultCommit;
synchronized (WriteableBeanDatabaseImpl.this) {
defaultCommit = commitMessage;
}
hub.activateCurrentDatabase(WriteableBeanDatabaseImpl.this, defaultCommit, changes, completedListeners);
for (WriteableTypeImpl removedType : removedTypes) {
removedType.getHelper().dispose();
}
removedTypes.clear();
}
/* (non-Javadoc)
* @see org.glassfish.hk2.api.TwoPhaseResource#rollbackDynamicConfiguration(org.glassfish.hk2.api.TwoPhaseTransactionData)
*/
@Override
public void rollbackDynamicConfiguration(
TwoPhaseTransactionData dynamicConfiguration) {
LinkedList completedListeners = this.completedListeners;
this.completedListeners = null;
Object defaultCommit;
synchronized (WriteableBeanDatabaseImpl.this) {
defaultCommit = commitMessage;
}
hub.rollbackCurrentDatabase(WriteableBeanDatabaseImpl.this, defaultCommit, changes, completedListeners);
for (WriteableTypeImpl removedType : removedTypes) {
removedType.getHelper().dispose();
}
removedTypes.clear();
}
}
private String getChanges() {
int lcv = 1;
StringBuffer sb = new StringBuffer("\n");
for (Change change : changes) {
sb.append(lcv + ". " + change + "\n");
lcv++;
}
return sb.toString();
}
@Override
public String toString() {
return "WriteableBeanDatabaseImpl(" + baseRevision + ",changes=" + getChanges() + "," + System.identityHashCode(this) + ")";
}
}
