/*
* JBoss, Home of Professional Open Source.
* Copyright 2011, Red Hat, Inc., and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.as.ee.component;
import static org.jboss.as.ee.EeMessages.MESSAGES;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import org.jboss.as.naming.ManagedReference;
import org.jboss.as.naming.ManagedReferenceFactory;
import org.jboss.as.naming.ValueManagedReference;
import org.jboss.as.naming.deployment.ContextNames;
import org.jboss.as.server.deployment.DeploymentPhaseContext;
import org.jboss.msc.inject.Injector;
import org.jboss.msc.service.ServiceBuilder;
import org.jboss.msc.value.ImmediateValue;
/**
* An injection source that gets its value from an optional JNDI lookup.
*
* An optional dependency is added on the lookup value, and then the value
* is obtained from an actual JNDI lookup. This means that the value injected
* may change over the life of the application, e.g. if global env-entries
* defined from another application are changed.
*
* If this item is not found, then nothing is injected
*
*/
public final class OptionalLookupInjectionSource extends InjectionSource {
private final String lookupName;
public OptionalLookupInjectionSource(final String lookupName) {
if (lookupName == null) {
throw MESSAGES.nullVar("lookupName");
}
this.lookupName = lookupName;
}
/**
* {@inheritDoc}
*/
public void getResourceValue(final ResolutionContext resolutionContext, final ServiceBuilder<?> serviceBuilder, final DeploymentPhaseContext phaseContext, final Injector<ManagedReferenceFactory> injector) {
final String applicationName = resolutionContext.getApplicationName();
final String moduleName = resolutionContext.getModuleName();
final String componentName = resolutionContext.getComponentName();
final boolean compUsesModule = resolutionContext.isCompUsesModule();
final String lookupName;
if (!this.lookupName.contains("java:")) {
if (componentName != null && !compUsesModule) {
lookupName = "java:comp/env/" + this.lookupName;
} else if (compUsesModule) {
lookupName = "java:module/env/" + this.lookupName;
} else {
lookupName = "java:jboss/env" + this.lookupName;
}
} else if (this.lookupName.startsWith("java:comp/") && compUsesModule) {
lookupName = "java:module/" + this.lookupName.substring(10);
} else {
lookupName = this.lookupName;
}
final ContextNames.BindInfo bindInfo = ContextNames.bindInfoFor(applicationName, moduleName, componentName, lookupName);
serviceBuilder.addDependency(ServiceBuilder.DependencyType.OPTIONAL, bindInfo.getBinderServiceName());
injector.inject(new OptionalLookupManagedReferenceFactory(lookupName));
}
public boolean equals(Object configuration) {
if (configuration instanceof OptionalLookupInjectionSource) {
OptionalLookupInjectionSource lookup = (OptionalLookupInjectionSource) configuration;
return lookupName.equals(lookup.lookupName);
}
return false;
}
public int hashCode() {
return lookupName.hashCode();
}
private static class OptionalLookupManagedReferenceFactory implements ManagedReferenceFactory {
private final String lookupName;
public OptionalLookupManagedReferenceFactory(final String lookupName) {
this.lookupName = lookupName;
}
@Override
public ManagedReference getReference() {
try {
Object value = new InitialContext().lookup(lookupName);
return new ValueManagedReference(new ImmediateValue<Object>(value));
} catch (NamingException e) {
return null;
}
}
}
}