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package com.sun.ejb.containers;
import java.io.Serializable;
import java.lang.reflect.Method;
import javax.ejb.*;
import java.lang.reflect.Proxy;
import java.lang.reflect.InvocationHandler;
import com.sun.ejb.*;
import com.sun.ejb.portable.*;
import com.sun.enterprise.*;
import com.sun.enterprise.log.Log;
import com.sun.enterprise.util.LocalStringManagerImpl;
import java.util.logging.*;
import java.util.HashMap;
import com.sun.logging.*;
import java.io.IOException;
import com.sun.ejb.spi.io.IndirectlySerializable;
import com.sun.ejb.spi.io.SerializableObjectFactory;
/**
* Implementation of the EJBLocalObject interface.
* This is NOT serializable to prevent local references from leaving
* the JVM.
* It is extended by the generated concrete type-specific EJBLocalObject
* implementation (e.g. Hello_EJBLocalObject).
*
* @author Mahesh Kannan
*/
public abstract class EJBLocalObjectImpl
extends EJBLocalRemoteObject
implements EJBLocalObject, IndirectlySerializable
{
private static final Logger _logger =
LogDomains.getLogger(LogDomains.EJB_LOGGER);
private static LocalStringManagerImpl localStrings =
new LocalStringManagerImpl(EJBLocalObjectImpl.class);
private static Class[] NO_PARAMS = new Class[] {};
private static Method REMOVE_METHOD = null;
static {
try {
REMOVE_METHOD =
EJBLocalObject.class.getMethod("remove", NO_PARAMS);
} catch ( NoSuchMethodException e ) {
_logger.log(Level.FINE, "Exception retrieving remove method", e);
}
}
// True this local object instance represents the LocalHome view
// False if this local object instance represents the LocalBusiness view
private boolean isLocalHomeView;
private HashMap<String, Object> clientObjectMap =
new HashMap<String, Object>();
/**
* Get the client object corresponding to an EJBLocalObjectImpl.
* Users of this class cannot
* assume they can cast an EJBLocalObjectImpl to the object that
* the client uses, and vice-versa. This is overridden in the
* InvocationHandler. Only applicable for local home view.
*/
protected Object getClientObject() {
return this;
}
void mapClientObject(String intfClassName, Object obj) {
clientObjectMap.put(intfClassName, obj);
}
Object getClientObject(String intfClassName) {
return clientObjectMap.get(intfClassName);
}
void setIsLocalHomeView(boolean flag) {
isLocalHomeView = flag;
}
boolean isLocalHomeView() {
return isLocalHomeView;
}
/**
* Since EJBLocalObject might be a dynamic proxy, the container can't assume
* it can cast from EJBLocalObject to EJBLocalObjectImpl. This convenience
* method is used to hide the logic behind the translation from an
* client-side EJBLocalObject to the corresponding EJBLocalObjectImpl.
*
* In the case of a proxy, the invocation handler is the
* EJBLocalObjectImpl. Otherwise, the argument is returned as is.
* NOTE : To translate in the other direction, use
* EJBLocalObjectImpl.getEJBLocalObject()
*
*/
static EJBLocalObjectImpl toEJBLocalObjectImpl(EJBLocalObject localObj) {
EJBLocalObjectImpl localObjectImpl;
if( localObj instanceof EJBLocalObjectImpl ) {
localObjectImpl = (EJBLocalObjectImpl) localObj;
} else {
localObjectImpl = (EJBLocalObjectImpl)
Proxy.getInvocationHandler(localObj);
}
return localObjectImpl;
}
public EJBLocalHome getEJBLocalHome() throws EJBException {
container.authorizeLocalMethod(
BaseContainer.EJBLocalObject_getEJBLocalHome);
container.checkExists(this);
return container.getEJBLocalHome();
}
public void remove() throws RemoveException, EJBException {
// authorization is performed within container
try {
container.removeBean(this, REMOVE_METHOD, true);
} catch(java.rmi.RemoteException re) {
// This should never be thrown for local invocations, but it's
// part of the removeBean signature. If for some strange
// reason it happens, convert to EJBException
EJBException ejbEx =new EJBException("unexpected RemoteException");
ejbEx.initCause(re);
throw ejbEx;
}
}
public Object getPrimaryKey()
throws EJBException
{
if ( container instanceof EntityContainer ) {
container.authorizeLocalMethod(
BaseContainer.EJBLocalObject_getPrimaryKey);
container.checkExists(this);
return primaryKey;
}
else {
throw new EJBException(localStrings.getLocalString(
"containers.invalid_operation",
"Invalid operation for Session EJBs."));
}
}
public boolean isIdentical(EJBLocalObject other)
throws EJBException
{
container.authorizeLocalMethod(
BaseContainer.EJBLocalObject_isIdentical);
container.checkExists(this);
// For all types of beans (entity, stful/stless session),
// there is exactly one EJBLocalObject instance per bean identity.
if ( this == other )
return true;
else
return false;
}
/**
* Called from EJBUtils.EJBObjectOutputStream.replaceObject
*/
public SerializableObjectFactory getSerializableObjectFactory() {
// Note: for stateful SessionBeans, the EJBLocalObjectImpl contains
// a pointer to the EJBContext. We should not serialize it here.
return new SerializableLocalObject
(container.getEjbDescriptor().getUniqueId(), isLocalHomeView,
primaryKey, getSfsbClientVersion());
}
private static final class SerializableLocalObject
implements SerializableObjectFactory
{
private long containerId;
private boolean localHomeView;
private Object primaryKey;
private long version; //Used only for SFSBs
private transient static Logger _logger;
static {
_logger=LogDomains.getLogger(LogDomains.EJB_LOGGER);
}
SerializableLocalObject(long containerId,
boolean localHomeView,
Object primaryKey, long version) {
this.containerId = containerId;
this.localHomeView = localHomeView;
this.primaryKey = primaryKey;
this.version = version;
}
long getVersion() {
return version;
}
public Object createObject()
throws IOException
{
BaseContainer container = (BaseContainer) Switch.getSwitch().
getContainerFactory().getContainer(containerId);
if( localHomeView ) {
EJBLocalObjectImpl ejbLocalObjectImpl =
container.getEJBLocalObjectImpl(primaryKey);
ejbLocalObjectImpl.setSfsbClientVersion(version);
// Return the client EJBLocalObject.
return ejbLocalObjectImpl.getClientObject();
} else {
EJBLocalObjectImpl ejbLocalBusinessObjectImpl =
container.getEJBLocalBusinessObjectImpl(primaryKey);
ejbLocalBusinessObjectImpl.setSfsbClientVersion(version);
// Return the client EJBLocalObject.
return ejbLocalBusinessObjectImpl.getClientObject();
}
}
}
}
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