/*
* 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.openejb.core.ivm.naming;
import org.apache.openejb.AppContext;
import org.apache.openejb.core.WebContext;
import org.apache.openejb.loader.SystemInstance;
import org.apache.openejb.spi.ContainerSystem;
import org.apache.openejb.util.Strings;
import javax.naming.Context;
import javax.naming.NameNotFoundException;
import javax.naming.NamingException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.concurrent.CopyOnWriteArrayList;
public class ContextualJndiReference extends IntraVmJndiReference {
public static final ThreadLocal<Boolean> followReference = new ThreadLocal<Boolean>() {
@Override
public Boolean initialValue() {
return true;
}
};
private Object defaultValue;
private final List<String> prefixes = new CopyOnWriteArrayList<String>();
public ContextualJndiReference(final String jndiName) {
super(jndiName);
}
public void setDefaultValue(final Object defaultValue) {
this.defaultValue = defaultValue;
}
public void addPrefix(final String value) {
if (value != null) {
prefixes.add(value);
}
}
public void removePrefix(final String value) {
if (value != null) {
prefixes.remove(value);
}
}
public String lastPrefix() {
if (prefixes.isEmpty()) {
return null;
}
return prefixes.get(prefixes.size() - 1);
}
public boolean hasNoMorePrefix() {
return prefixes.isEmpty();
}
public int prefixesSize() {
return prefixes.size();
}
@Override
public Object getObject() throws NamingException {
final Object delegate = findDelegate();
if (Reference.class.isInstance(delegate)) {
return Reference.class.cast(delegate).getObject();
}
return delegate;
}
private Object findDelegate() throws NameNotFoundException {
final Boolean rawValue = !followReference.get();
followReference.remove();
if (rawValue) {
return this;
}
final String prefix = findPrefix();
final String jndiName = getJndiName();
if (prefix != null && !prefix.isEmpty()) {
try {
return lookup(prefix + '/' + jndiName);
} catch (final NamingException e) {
// no-op
}
}
final Collection<Object> values = new ArrayList<Object>();
for (final String p : prefixes) {
if (p != null && !p.isEmpty()) {
try {
values.add(lookup(p + '/' + jndiName));
} catch (final NamingException e) {
// no-op
}
}
}
if (1 == values.size()) {
return values.iterator().next();
} else if (!values.isEmpty()) {
throw new NameNotFoundException("Ambiguous resource '" + getJndiName()
+ "' for classloader " + Thread.currentThread().getContextClassLoader());
}
return defaultValue;
}
private String findPrefix() {
final ClassLoader loader = Thread.currentThread().getContextClassLoader();
final ContainerSystem containerSystem = SystemInstance.get().getComponent(ContainerSystem.class);
for (final AppContext appContext : containerSystem.getAppContexts()) {
if (appContext.getClassLoader().equals(loader)) {
return appContext.getId();
}
for (final WebContext web : appContext.getWebContexts()) {
if (web.getClassLoader().equals(loader)) {
return appContext.getId();
}
}
}
if (1 == containerSystem.getAppContexts().size()) {
return containerSystem.getAppContexts().iterator().next().getId();
}
return null;
}
private Object lookup(final String s) throws NamingException {
final ContainerSystem containerSystem = SystemInstance.get().getComponent(ContainerSystem.class);
final Context jndiContext = containerSystem.getJNDIContext();
try {
if (s.startsWith("java:") | s.startsWith("openejb:")) {
return jndiContext.lookup(s);
} else {
return jndiContext.lookup("openejb/Resource/" + s);
}
} catch (final NameNotFoundException e) {
return jndiContext.lookup("java:module/" + Strings.lastPart(getClassName(), '.'));
} catch (final NamingException e) {
throw (NamingException) new NamingException("could not look up " + s).initCause(e);
}
}
@Override
public String toString() {
return "ContextualJndiReference{" +
"jndiName='" + getJndiName() + '\'' +
'}';
}
}