/*
* 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.datanucleus.store.rdbms.datasource.dbcp.datasources;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.util.Hashtable;
import java.util.Map;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Properties;
import javax.naming.Context;
import javax.naming.Name;
import javax.naming.RefAddr;
import javax.naming.Reference;
import javax.naming.spi.ObjectFactory;
/**
* A JNDI ObjectFactory which creates <code>SharedPoolDataSource</code>s
* or <code>PerUserPoolDataSource</code>s
*
* @version $Revision: 814246 $ $Date: 2009-09-12 18:44:58 -0400 (Sat, 12 Sep 2009) $
*/
abstract class InstanceKeyObjectFactory
implements ObjectFactory
{
private static final Map instanceMap = new HashMap();
synchronized static String registerNewInstance(InstanceKeyDataSource ds) {
int max = 0;
Iterator i = instanceMap.keySet().iterator();
while (i.hasNext()) {
Object obj = i.next();
if (obj instanceof String)
{
try {
max = Math.max(max, Integer.valueOf((String)obj).intValue());
}
catch (NumberFormatException e) {
// no sweat, ignore those keys
}
}
}
String instanceKey = String.valueOf(max + 1);
// put a placeholder here for now, so other instances will not
// take our key. we will replace with a pool when ready.
instanceMap.put(instanceKey, ds);
return instanceKey;
}
static void removeInstance(String key)
{
instanceMap.remove(key);
}
/**
* Close all pools associated with this class.
*/
public static void closeAll() throws Exception {
//Get iterator to loop over all instances of this datasource.
Iterator instanceIterator = instanceMap.entrySet().iterator();
while (instanceIterator.hasNext()) {
((InstanceKeyDataSource)
((Map.Entry) instanceIterator.next()).getValue()).close();
}
instanceMap.clear();
}
/**
* implements ObjectFactory to create an instance of SharedPoolDataSource
* or PerUserPoolDataSource
*/
public Object getObjectInstance(Object refObj, Name name,
Context context, Hashtable env)
throws IOException, ClassNotFoundException {
// The spec says to return null if we can't create an instance
// of the reference
Object obj = null;
if (refObj instanceof Reference) {
Reference ref = (Reference) refObj;
if (isCorrectClass(ref.getClassName())) {
RefAddr ra = ref.get("instanceKey");
if (ra != null && ra.getContent() != null) {
// object was bound to jndi via Referenceable api.
obj = instanceMap.get(ra.getContent());
}
else
{
// tomcat jndi creates a Reference out of server.xml
// <ResourceParam> configuration and passes it to an
// instance of the factory given in server.xml.
String key = null;
if (name != null)
{
key = name.toString();
obj = instanceMap.get(key);
}
if (obj == null)
{
InstanceKeyDataSource ds = getNewInstance(ref);
setCommonProperties(ref, ds);
obj = ds;
if (key != null)
{
instanceMap.put(key, ds);
}
}
}
}
}
return obj;
}
private void setCommonProperties(Reference ref,
InstanceKeyDataSource ikds)
throws IOException, ClassNotFoundException {
RefAddr ra = ref.get("dataSourceName");
if (ra != null && ra.getContent() != null) {
ikds.setDataSourceName(ra.getContent().toString());
}
ra = ref.get("defaultAutoCommit");
if (ra != null && ra.getContent() != null) {
ikds.setDefaultAutoCommit(Boolean.valueOf(
ra.getContent().toString()).booleanValue());
}
ra = ref.get("defaultReadOnly");
if (ra != null && ra.getContent() != null) {
ikds.setDefaultReadOnly(Boolean.valueOf(
ra.getContent().toString()).booleanValue());
}
ra = ref.get("description");
if (ra != null && ra.getContent() != null) {
ikds.setDescription(ra.getContent().toString());
}
ra = ref.get("jndiEnvironment");
if (ra != null && ra.getContent() != null) {
byte[] serialized = (byte[]) ra.getContent();
ikds.jndiEnvironment =
(Properties) deserialize(serialized);
}
ra = ref.get("loginTimeout");
if (ra != null && ra.getContent() != null) {
ikds.setLoginTimeout(
Integer.parseInt(ra.getContent().toString()));
}
ra = ref.get("testOnBorrow");
if (ra != null && ra.getContent() != null) {
ikds.setTestOnBorrow(Boolean.valueOf(
ra.getContent().toString()).booleanValue());
}
ra = ref.get("testOnReturn");
if (ra != null && ra.getContent() != null) {
ikds.setTestOnReturn(Boolean.valueOf(
ra.getContent().toString()).booleanValue());
}
ra = ref.get("timeBetweenEvictionRunsMillis");
if (ra != null && ra.getContent() != null) {
ikds.setTimeBetweenEvictionRunsMillis(
Integer.parseInt(ra.getContent().toString()));
}
ra = ref.get("numTestsPerEvictionRun");
if (ra != null && ra.getContent() != null) {
ikds.setNumTestsPerEvictionRun(
Integer.parseInt(ra.getContent().toString()));
}
ra = ref.get("minEvictableIdleTimeMillis");
if (ra != null && ra.getContent() != null) {
ikds.setMinEvictableIdleTimeMillis(
Integer.parseInt(ra.getContent().toString()));
}
ra = ref.get("testWhileIdle");
if (ra != null && ra.getContent() != null) {
ikds.setTestWhileIdle(Boolean.valueOf(
ra.getContent().toString()).booleanValue());
}
ra = ref.get("validationQuery");
if (ra != null && ra.getContent() != null) {
ikds.setValidationQuery(ra.getContent().toString());
}
}
/**
* @return true if and only if className is the value returned
* from getClass().getName().toString()
*/
protected abstract boolean isCorrectClass(String className);
/**
* Creates an instance of the subclass and sets any properties
* contained in the Reference.
*/
protected abstract InstanceKeyDataSource getNewInstance(Reference ref)
throws IOException, ClassNotFoundException;
/**
* used to set some properties saved within a Reference
*/
protected static final Object deserialize(byte[] data)
throws IOException, ClassNotFoundException {
ObjectInputStream in = null;
try {
in = new ObjectInputStream(new ByteArrayInputStream(data));
return in.readObject();
} finally {
if (in != null) {
try {
in.close();
} catch (IOException ex) {
}
}
}
}
}