/** | |
* | |
* Copyright 2005-2006 The Apache Software Foundation or its licensors, as applicable. | |
* | |
* 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.xbean.spring.jndi; | |
import edu.emory.mathcs.backport.java.util.concurrent.ConcurrentHashMap; | |
import org.apache.commons.logging.Log; | |
import org.apache.commons.logging.LogFactory; | |
import org.springframework.beans.factory.BeanFactory; | |
import org.springframework.core.io.ClassPathResource; | |
import org.springframework.core.io.Resource; | |
import org.springframework.core.io.ResourceEditor; | |
import org.apache.xbean.spring.context.impl.XBeanXmlBeanFactory; | |
import javax.naming.Context; | |
import javax.naming.NamingException; | |
import javax.naming.spi.InitialContextFactory; | |
import java.util.HashMap; | |
import java.util.Hashtable; | |
import java.util.Map; | |
/** | |
* A simple JNDI initial context which loads the JNDI namespace from a spring.xml configuration file. | |
* The spring.xml configuration file can be specified by the {@link Context#PROVIDER_URL} property | |
* which can be any spring resource string (classpath://foo.xml, or file://foo/bar.xml or a URL) | |
* otherwise the jndi.xml file is found on the classpath. | |
* | |
* @version $Revision: 657 $ | |
*/ | |
public class SpringInitialContextFactory implements InitialContextFactory { | |
private static final transient Log log = LogFactory.getLog(SpringInitialContextFactory.class); | |
private static Map cache = new HashMap(); | |
private static Context singleton; | |
/** | |
* A factory method which can be used to initialise a singleton JNDI context from inside a Spring.xml | |
* such that future calls to new InitialContext() will reuse it | |
*/ | |
public static Context makeInitialContext() { | |
singleton = new DefaultContext(); | |
return singleton; | |
} | |
public Context getInitialContext(Hashtable environment) throws NamingException { | |
if (singleton != null) { | |
return singleton; | |
} | |
Resource resource = null; | |
Object value = environment.get(Context.PROVIDER_URL); | |
String key = "jndi.xml"; | |
if (value == null) { | |
resource = new ClassPathResource(key); | |
} | |
else { | |
if (value instanceof Resource) { | |
resource = (Resource) value; | |
} | |
else { | |
ResourceEditor editor = new ResourceEditor(); | |
key = value.toString(); | |
editor.setAsText(key); | |
resource = (Resource) editor.getValue(); | |
} | |
} | |
BeanFactory context = loadContext(resource, key); | |
Context answer = (Context) context.getBean("jndi"); | |
if (answer == null) { | |
log.warn("No JNDI context available in JNDI resource: " + resource); | |
answer = new DefaultContext(environment, new ConcurrentHashMap()); | |
} | |
return answer; | |
} | |
protected BeanFactory loadContext(Resource resource, String key) { | |
synchronized (cache) { | |
BeanFactory answer = (BeanFactory) cache.get(key); | |
if (answer == null) { | |
answer = createContext(resource); | |
cache.put(key, answer); | |
} | |
return answer; | |
} | |
} | |
protected BeanFactory createContext(Resource resource) { | |
log.info("Loading JNDI context from: " + resource); | |
return new XBeanXmlBeanFactory(resource); | |
} | |
} |