/*
* Copyright 1999-2002,2004 The Apache Software Foundation.
*
* 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.apache.cocoon.ojb.odmg.components;
import java.util.Hashtable;
import java.util.Iterator;
import java.util.Set;
import org.apache.avalon.framework.activity.Disposable;
import org.apache.avalon.framework.activity.Initializable;
import org.apache.avalon.framework.configuration.Configurable;
import org.apache.avalon.framework.configuration.Configuration;
import org.apache.avalon.framework.configuration.ConfigurationException;
import org.apache.avalon.framework.thread.ThreadSafe;
import org.apache.cocoon.ojb.components.AbstractOjbImpl;
import org.apache.ojb.odmg.OJB;
import org.odmg.Database;
import org.odmg.Implementation;
import org.odmg.ODMGException;
/**
* Implementation of the OdmgImplementation. Create a ODMG Implementation and store it for future use
*
* @author <a href="mailto:giacomo@apache.org">Giacomo Pati</a>
* @version CVS $Id: OdmgImplementationImpl.java,v 1.3 2004/03/05 13:02:02 bdelacretaz Exp $
*/
public class OdmgImplementationImpl
extends AbstractOjbImpl
implements OdmgImplementation, Configurable, Initializable, Disposable, ThreadSafe {
private final static String DEFAULT_CONNECTION ="default";
private final static int DEFAULT_MODE = Database.OPEN_READ_WRITE;
private Implementation odmg;
private Hashtable databases = new Hashtable();
/* (non-Javadoc)
* @see org.apache.avalon.framework.configuration.Configurable#configure(org.apache.avalon.framework.configuration.Configuration)
*/
public void configure(Configuration myconf)
throws ConfigurationException {
if (this.getLogger().isDebugEnabled()) {
this.getLogger().debug("OJB-ODMG: configuration");
}
}
/* (non-Javadoc)
* @see org.apache.avalon.framework.activity.Disposable#dispose()
*/
public void dispose() {
super.dispose();
synchronized(this.databases) {
final Set keys = this.databases.keySet();
for( Iterator i = keys.iterator(); i.hasNext(); )
{
final Database db = (Database)i.next();
try
{
db.close();
}
catch( final ODMGException e) {
getLogger().error( "OJB-ODMG: Cannot close Database", e);
}
i.remove();
}
}
if (this.getLogger().isDebugEnabled()) {
this.getLogger().debug("OJB-ODMG: Disposed OK!");
}
}
/* (non-Javadoc)
* @see org.apache.avalon.framework.activity.Initializable#initialize()
*/
public void initialize()
throws Exception {
super.initialize();
try {
// Get the Implementation
this.odmg = OJB.getInstance();
if (this.getLogger().isDebugEnabled()) {
this.getLogger().debug("OJB-ODMG: Started OK!");
}
} catch (Throwable t) {
if (this.getLogger().isFatalErrorEnabled()) {
this.getLogger().fatalError("OJB-ODMG: Started failed: Cannot get an ODMG Implementation.", t);
}
}
}
/* (non-Javadoc)
* @see org.apache.cocoon.ojb.odmg.components.Odmg#getInstance()
*/
public Implementation getInstance() throws ODMGException {
Database db = (Database)this.databases.get( DEFAULT_CONNECTION );
if(null == db ) {
db = this.odmg.newDatabase();
db.open(DEFAULT_CONNECTION, DEFAULT_MODE);
synchronized (this.databases) {
this.databases.put( DEFAULT_CONNECTION + DEFAULT_MODE, db );
}
}
return this.odmg;
}
/* (non-Javadoc)
* @see org.apache.cocoon.ojb.odmg.components.Odmg#getInstance(java.lang.String, int)
*/
public Implementation getInstance(String connection, int mode) throws ODMGException {
Database db = (Database)this.databases.get( connection + mode);
if(null == db ) {
db = this.odmg.newDatabase();
db.open(connection, mode);
synchronized (this.databases) {
this.databases.put( connection + mode, db );
}
}
return this.odmg;
}
/* (non-Javadoc)
* @see org.apache.cocoon.ojb.odmg.components.Odmg#getInstance(java.lang.String)
*/
public Implementation getInstance(String connection) throws ODMGException {
Database db = (Database)this.databases.get( connection + DEFAULT_MODE);
if(null == db ) {
db = this.odmg.newDatabase();
db.open(connection, DEFAULT_MODE);
synchronized (this.databases) {
this.databases.put( connection + DEFAULT_MODE, db );
}
}
return this.odmg;
}
/* (non-Javadoc)
* @see org.apache.cocoon.ojb.odmg.components.OdmgImplementation#getInstance(int)
*/
public Implementation getInstance( int mode ) throws ODMGException
{
Database db = (Database)this.databases.get( DEFAULT_CONNECTION+ mode);
if(null == db ) {
db = this.odmg.newDatabase();
db.open(DEFAULT_CONNECTION, mode);
synchronized (this.databases) {
this.databases.put( DEFAULT_CONNECTION+ mode, db );
}
}
return this.odmg;
}
}