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EjbSupplier.java
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EjbSupplier.java
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/*
* Copyright (c) 2022 Contributors to the Eclipse Foundation
* Copyright (c) 2021 Eclipse Foundation and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0, which is available at
* http://www.eclipse.org/legal/epl-2.0.
*
* This Source Code may also be made available under the following Secondary
* Licenses when the conditions for such availability set forth in the
* Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
* version 2 with the GNU Classpath Exception, which is available at
* https://www.gnu.org/software/classpath/license.html.
*
* SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
*/
package org.glassfish.jersey.gf.ejb.internal;
import jakarta.ejb.Singleton;
import jakarta.ejb.Stateless;
import java.util.List;
import java.util.function.Supplier;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import static org.glassfish.api.naming.SimpleJndiName.JNDI_CTX_JAVA_APP;
import static org.glassfish.api.naming.SimpleJndiName.JNDI_CTX_JAVA_MODULE;
import static org.glassfish.jersey.gf.ejb.internal.EjbClassUtilities.getRemoteAndLocalIfaces;
/**
* Supplier to provide EJB components obtained via JNDI lookup.
*
* @param <T> The raw type of the bean
*/
class EjbSupplier<T> implements Supplier<T> {
private static final Logger LOG = Logger.getLogger(EjbSupplier.class.getName());
private final InitialContext ctx;
private final Class<T> clazz;
private final String beanName;
private final EjbComponentProvider provider;
EjbSupplier(final Class<T> rawType, final InitialContext ctx, final EjbComponentProvider ejbProvider) {
this.clazz = rawType;
this.ctx = ctx;
this.provider = ejbProvider;
this.beanName = getBeanName(rawType);
}
@Override
public T get() {
try {
return lookup(clazz, beanName);
} catch (final NamingException ex) {
LOG.log(Level.SEVERE, "Could not find bean " + beanName + " of " + clazz, ex);
return null;
}
}
private static <T> String getBeanName(final Class<T> clazz) {
final Stateless stateless = clazz.getAnnotation(Stateless.class);
if (stateless != null) {
if (stateless.name().isEmpty()) {
return clazz.getSimpleName();
}
return stateless.name();
}
final Singleton singleton = clazz.getAnnotation(Singleton.class);
if (singleton != null) {
if (singleton.name().isEmpty()) {
return clazz.getSimpleName();
}
return singleton.name();
}
return clazz.getSimpleName();
}
private T lookup(final Class<T> rawType, final String name) throws NamingException {
try {
return lookup(rawType, name, false);
} catch (final NamingException ex) {
LOG.log(Level.WARNING,
"An instance of EJB class, " + rawType.getName()
+ ", could not be looked up using simple form name."
+ " Attempting to look up using the fully-qualified form name.",
ex);
return lookup(rawType, name, true);
}
}
private T lookup(final Class<?> rawType, final String name, final boolean useRawTypeInJndiName)
throws NamingException {
final List<String> libNames = provider.getModuleNames();
if (libNames.isEmpty()) {
final String jndiName = toJndiName(JNDI_CTX_JAVA_MODULE, null, name, useRawTypeInJndiName ? rawType : null);
return lookupTyped(jndiName);
}
NamingException exception = null;
for (final String module : libNames) {
final String jndiName = toJndiName(JNDI_CTX_JAVA_APP, module, name, useRawTypeInJndiName ? rawType : null);
T result;
try {
result = lookupTyped(jndiName);
if (result != null && isLookupInstanceValid(rawType, result)) {
return result;
}
} catch (final NamingException e) {
exception = e;
}
}
throw exception == null
? new NamingException("JNDI name " + name + " wasn't found in any of modules.")
: exception;
}
private T lookupTyped(final String name) throws NamingException {
final Object object = ctx.lookup(name);
try {
@SuppressWarnings("unchecked")
final T typed = (T) object;
return typed;
} catch (final ClassCastException cause) {
final NamingException e = new NamingException("The name " + name + " was found, but the type is incorrect.");
e.initCause(cause);
throw e;
}
}
private static String toJndiName(final String prefix, final String contextName, final String name, final Class<?> rawType) {
final StringBuilder jndiName = new StringBuilder(64);
jndiName.append(prefix);
if (contextName != null) {
jndiName.append(contextName).append('/');
}
jndiName.append(name);
if (rawType != null) {
jndiName.append('!').append(rawType.getName());
}
return jndiName.toString();
}
private static boolean isLookupInstanceValid(final Class<?> rawType, final Object result) {
return rawType.isInstance(result) || getRemoteAndLocalIfaces(rawType).stream()
.filter(iface -> iface.isInstance(result)).findAny().isPresent();
}
}