/*
* 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.util.proxy;
import org.apache.openejb.BeanContext;
import org.apache.openejb.RpcContainer;
import org.apache.openejb.core.ivm.IntraVmProxy;
import java.io.Serializable;
import java.lang.ref.WeakReference;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;
public final class ProxyEJB {
private ProxyEJB() {
// no-op
}
public static Object subclassProxy(final BeanContext beanContext) {
try {
return LocalBeanProxyFactory.newProxyInstance(beanContext.getModuleContext().getClassLoader(), new Handler(beanContext),
beanContext.getBeanClass(), IntraVmProxy.class, Serializable.class);
} catch (final InternalError ie) { // try without intravmproxy which is maybe not loadable (in OSGi it can happen)
return LocalBeanProxyFactory.newProxyInstance(beanContext.getModuleContext().getClassLoader(), new Handler(beanContext),
beanContext.getBeanClass(), Serializable.class);
}
}
// same as proxy() but it doesn't add IvmProxy and Serializable interfaces (use in bridges proxies like OSGi services)
public static Object simpleProxy(final BeanContext beanContext, final Class<?>[] itfs) {
if (beanContext.isLocalbean()) {
return LocalBeanProxyFactory.newProxyInstance(itfs[0].getClassLoader(), new Handler(beanContext), itfs[0]);
}
return Proxy.newProxyInstance(itfs[0].getClassLoader(), itfs, new Handler(beanContext));
}
public static Object proxy(final BeanContext beanContext, final Class<?>[] itfs) {
if (beanContext.isLocalbean()) {
return LocalBeanProxyFactory.newProxyInstance(itfs[0].getClassLoader(), new Handler(beanContext), itfs[0], IntraVmProxy.class, Serializable.class);
}
return Proxy.newProxyInstance(itfs[0].getClassLoader(), itfs, new Handler(beanContext));
}
private static class Handler implements BeanContextInvocationHandler {
private final transient WeakReference<BeanContext> beanContextRef;
private final Object deploymentID;
public Handler(final BeanContext bc) {
beanContextRef = new WeakReference<BeanContext>(bc);
deploymentID = bc.getDeploymentID();
}
@Override
public Object invoke(final Object proxy, final Method method, final Object[] args) throws Throwable {
final BeanContext beanContext = getBeanContext();
final RpcContainer container = RpcContainer.class.cast(beanContext.getContainer());
return container.invoke(beanContext.getDeploymentID(),
beanContext.getInterfaceType(method.getDeclaringClass()),
method.getDeclaringClass(), method, args, null);
}
public BeanContext getBeanContext() {
final BeanContext beanContext = beanContextRef.get();
if (beanContext == null || beanContext.isDestroyed()) {
beanContextRef.clear();
throw new IllegalStateException("Bean '" + deploymentID + "' has been undeployed.");
}
return beanContext;
}
}
}