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/*
* Copyright (c) 2022, 2024 Contributors to the Eclipse Foundation.
* Copyright (c) 1997, 2020 Oracle 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 com.sun.ejb.containers;
import com.sun.ejb.Container;
import com.sun.ejb.EjbInvocation;
import com.sun.ejb.InvocationInfo;
import com.sun.ejb.containers.util.MethodMap;
import com.sun.enterprise.container.common.spi.util.IndirectlySerializable;
import com.sun.enterprise.deployment.EjbDescriptor;
import com.sun.enterprise.deployment.EjbSessionDescriptor;
import com.sun.enterprise.util.LocalStringManagerImpl;
import com.sun.enterprise.util.Utility;
import jakarta.ejb.EJBException;
import jakarta.ejb.EJBLocalHome;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
/**
* Handler for EJBLocalHome invocations through EJBLocalHome proxy.
*
* @author Kenneth Saks
*/
public class EJBLocalHomeInvocationHandler extends EJBLocalHomeImpl implements InvocationHandler {
private static LocalStringManagerImpl localStrings = new LocalStringManagerImpl(EJBLocalHomeInvocationHandler.class);
private boolean isStatelessSession_;
// Our associated proxy object. Used when a caller needs EJBLocalObject
// but only has InvocationHandler.
private EJBLocalHome proxy_;
private final Class localHomeIntfClass_;
// Cache reference to invocation info. There is one of these per
// container. It's populated during container initialization and
// passed in when the InvocationHandler is created. This avoids the
// overhead of building the method info each time a LocalHome proxy
// is created.
private MethodMap invocationInfoMap_;
protected EJBLocalHomeInvocationHandler(EjbDescriptor ejbDescriptor, Class localHomeIntf) throws Exception {
if (ejbDescriptor instanceof EjbSessionDescriptor) {
isStatelessSession_ = ((EjbSessionDescriptor) ejbDescriptor).isStateless();
} else {
isStatelessSession_ = false;
}
localHomeIntfClass_ = localHomeIntf;
// NOTE : Container is not set on super-class until after
// constructor is called.
}
public void setMethodMap(MethodMap map) {
invocationInfoMap_ = map;
}
public void setProxy(EJBLocalHome proxy) {
proxy_ = proxy;
}
@Override
protected EJBLocalHome getEJBLocalHome() {
return proxy_;
}
/**
* Called by EJBLocalHome proxy.
*/
@Override
public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
ClassLoader originalClassLoader = null;
// NOTE : be careful with "args" parameter. It is null
// if method signature has 0 arguments.
try {
getContainer().onEnteringContainer();
// In some cases(e.g. CDI + OSGi combination) ClassLoader
// is accessed from the current Thread. In those cases we need to set
// the context classloader to the application's classloader before
// proceeding. Otherwise, the context classloader could still
// reflect the caller's class loader.
if (Thread.currentThread().getContextClassLoader() != getContainer().getClassLoader()) {
originalClassLoader = Utility.setContextClassLoader(getContainer().getClassLoader());
}
Class methodClass = method.getDeclaringClass();
if (methodClass == Object.class) {
return InvocationHandlerUtil.invokeJavaObjectMethod(this, method, args);
} else if (methodClass == IndirectlySerializable.class) {
return this.getSerializableObjectFactory();
} else if (handleSpecialEJBLocalHomeMethod(method, methodClass)) {
return invokeSpecialEJBLocalHomeMethod(method, methodClass, args);
}
// Use optimized version of get that takes param count as an argument.
InvocationInfo invInfo = invocationInfoMap_.get(method, args == null ? 0 : args.length);
if (invInfo == null) {
throw new IllegalStateException("Unknown method :" + method);
}
if (methodClass == EJBLocalHome.class || invInfo.ejbIntfOverride) {
// There is only one method on jakarta.ejb.EJBLocalHome
super.remove(args[0]);
return null;
} else if (methodClass == GenericEJBLocalHome.class) {
// This is a creation request through the EJB 3.0
// client view, so just create a local business object and return it.
EJBLocalObjectImpl localImpl = createEJBLocalBusinessObjectImpl((String) args[0]);
return localImpl.getClientObject((String) args[0]);
}
// Process finder, create method, or home method.
Object returnValue = null;
final EJBLocalObjectImpl localObjectImpl;
if (invInfo.startsWithCreate) {
localObjectImpl = createEJBLocalObjectImpl();
if (localObjectImpl != null) {
returnValue = localObjectImpl.getClientObject();
}
} else {
localObjectImpl = null;
}
if (!isStatelessSession_) {
if (invInfo.targetMethod1 == null) {
Object[] params = new Object[] { invInfo.ejbName, "LocalHome", invInfo.method.toString() };
String errorMsg = localStrings.getLocalString("ejb.bean_class_method_not_found", "", params);
throw new EJBException(errorMsg);
}
EjbInvocation inv = getContainer().createEjbInvocation();
inv.isLocal = true;
inv.isHome = true;
inv.method = method;
inv.clientInterface = localHomeIntfClass_;
// Set cached invocation params. This will save additional lookups
// in BaseContainer.
inv.transactionAttribute = invInfo.txAttr;
inv.invocationInfo = invInfo;
if (localObjectImpl != null && invInfo.startsWithCreate) {
inv.ejbObject = localObjectImpl;
}
final BaseContainer container = getContainer();
try {
container.preInvoke(inv);
if (invInfo.startsWithCreate) {
Object ejbCreateReturnValue = invokeTargetBeanMethod(container, invInfo.targetMethod1, inv, inv.ejb, args);
postCreate(container, inv, invInfo, ejbCreateReturnValue, args);
if (inv.ejbObject != null) {
returnValue = ((EJBLocalObjectImpl) inv.ejbObject).getClientObject();
}
} else if (invInfo.startsWithFindByPrimaryKey) {
returnValue = container.invokeFindByPrimaryKey(invInfo.targetMethod1, inv, args);
} else if (invInfo.startsWithFind) {
Object pKeys = invokeTargetBeanMethod(container, invInfo.targetMethod1, inv, inv.ejb, args);
returnValue = container.postFind(inv, pKeys, null);
} else {
returnValue = invokeTargetBeanMethod(container, invInfo.targetMethod1, inv, inv.ejb, args);
}
} catch (InvocationTargetException ite) {
inv.exception = ite.getCause();
} catch (Throwable c) {
inv.exception = c;
} finally {
container.postInvoke(inv);
}
if (inv.exception != null) {
InvocationHandlerUtil.throwLocalException(inv.exception, method.getExceptionTypes());
}
}
return returnValue;
} finally {
if (originalClassLoader != null) {
Utility.setContextClassLoader(originalClassLoader);
}
getContainer().onLeavingContainer();
}
}
// default impl to be overridden in subclasses if special invoke is necessary
protected boolean handleSpecialEJBLocalHomeMethod(Method method, Class methodClass) {
return false;
}
// default impl to be overridden in subclasses if special invoke is necessary
protected Object invokeSpecialEJBLocalHomeMethod(Method method, Class methodClass, Object[] args) throws Throwable {
return null;
}
// default impl to be overridden in subclass if necessary
protected void postCreate(Container container, EjbInvocation inv, InvocationInfo invInfo, Object primaryKey, Object[] args)
throws Throwable {
}
/**
* Allow subclasses to execute a protected method in BaseContainer
*/
protected Object invokeTargetBeanMethod(BaseContainer container, Method beanClassMethod, EjbInvocation inv, Object target, Object[] params) throws Throwable {
return container.invokeTargetBeanMethod(beanClassMethod, inv, target, params);
}
}