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package com.sun.ejb.containers;
import java.rmi.UnmarshalException;
import javax.ejb.EJBException;
import javax.ejb.AccessLocalException;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Proxy;
import java.lang.reflect.Method;
import java.util.Map;
import com.sun.ejb.Invocation;
import com.sun.enterprise.Switch;
import com.sun.ejb.ComponentContext;
import com.sun.ejb.InvocationInfo;
import com.sun.enterprise.InvocationManager;
import com.sun.ejb.Container;
import com.sun.enterprise.deployment.EjbDescriptor;
import com.sun.enterprise.deployment.WebServiceEndpoint;
import com.sun.enterprise.util.LocalStringManagerImpl;
import com.sun.ejb.containers.util.InvocationHandlerUtil;
/**
* This is a proxy invocation handler for web service ejb invocations.
* A single instance of this invocation handler is used for all
* web service invocations to a particular ejb endpoint, so it must support
* concurrent use.
*
* @author Kenneth Saks
*/
public final class WebServiceInvocationHandler extends EJBLocalRemoteObject
implements InvocationHandler {
private WebServiceEndpoint endpoint_;
private Class ejbClass_;
private Class serviceEndpointIntfClass_;
private InvocationManager invManager_;
private boolean hasHandlers_;
private Map invocationInfoMap_;
protected static final LocalStringManagerImpl localStrings =
new LocalStringManagerImpl(WebServiceInvocationHandler.class);
public WebServiceInvocationHandler(Class ejbClass,
WebServiceEndpoint endpoint,
Class serviceEndpointIntfClass,
Map invocationInfoMap) {
ejbClass_ = ejbClass;
serviceEndpointIntfClass_ = serviceEndpointIntfClass;
endpoint_ = endpoint;
hasHandlers_ = endpoint.hasHandlers();
Switch theSwitch = Switch.getSwitch();
invManager_ = theSwitch.getInvocationManager();
invocationInfoMap_ = invocationInfoMap;
}
public Object invoke(Object proxy, Method method, Object[] args)
throws Throwable {
try {
container.onEnteringContainer();
// NOTE : be careful with "args" parameter. It is null
// if method signature has 0 arguments.
Class methodClass = method.getDeclaringClass();
if( methodClass == java.lang.Object.class ) {
return InvocationHandlerUtil.
invokeJavaObjectMethod(this, method, args);
}
Object returnValue = null;
Invocation inv = null;
try {
// Invocation was created earlier in the web service dispatching
inv = (Invocation) invManager_.getCurrentInvocation();
inv.ejbObject = this;
// things can become hairy here. This handler may have been created
// with a dummy SEI to satisfy the EJB container. In such cases, we must
// find the right method object on the SIB.
if (endpoint_.getServiceEndpointInterface().equals(ejbClass_.getName())) {
// we need to substiture the method object
method = ejbClass_.getMethod(method.getName(), method.getParameterTypes());
}
inv.method = method;
inv.clientInterface = serviceEndpointIntfClass_;
inv.invocationInfo = (InvocationInfo)
invocationInfoMap_.get(inv.method);
if( inv.invocationInfo == null ) {
throw new EJBException
("Web service Invocation Info lookup failed for " +
"method " + inv.method);
}
inv.transactionAttribute = inv.invocationInfo.txAttr;
// special handling of jaxrpc endpoints (identfied by mapping file)
if(endpoint_.getWebService().hasMappingFile()) {
if( hasHandlers_ ) {
// Handler performed method authorization already
} else {
StatelessSessionContainer container =
(StatelessSessionContainer) getContainer();
boolean authorized = container.authorize(inv);
if( !authorized ) {
throw new AccessLocalException
("Client not authorized to access " + inv.method);
}
}
} else if ( hasHandlers_ ) {
// jaxws enpoint
// authorization was done in security pipe
// Now that application handlers have run, do
// another method lookup and compare the results
// with the original one. This ensures that the
// application handlers have not changed
// which method is invoked.
Method methodBefore = inv.getWebServiceMethod();
if (methodBefore != null && !methodBefore.equals(inv.method)) {
inv.exception = new UnmarshalException
(localStrings.getLocalString
("enterprise.webservice.postHandlerMethodMismatch",
"Original Method {0} does not match post-handler method {1}",
new Object[] { methodBefore, inv.method }));
throw inv.exception;
}
}
ComponentContext ctx = container.getContext(inv);
inv.context = ctx;
inv.ejb = ctx.getEJB();
inv.instance = inv.ejb;
container.preInvokeTx(inv);
// Enterprise Bean class doesn't necessarily implement
// web service endpoint interface, so we can't directly
// dispatch through the given method object.
Method beanClassMethod = ejbClass_.getMethod
(method.getName(), method.getParameterTypes());
inv.beanMethod = beanClassMethod;
inv.methodParams = args;
returnValue = container.intercept(inv);
} catch(NoSuchMethodException nsme) {
inv.exception = nsme;
} catch(InvocationTargetException ite) {
inv.exception = ite.getCause();
} catch(Throwable c) {
inv.exception = c;
} finally {
if( inv.ejb != null ) {
// Do post invoke tx processing so that a commit failure
// will be visible to web service client.
container.postInvokeTx(inv);
}
}
if (inv.exception != null) {
if(inv.exception instanceof java.lang.RuntimeException) {
throw (java.lang.RuntimeException)inv.exception;
} else if (inv.exception instanceof Exception) {
throw inv.exception;
} else {
EJBException ejbEx = new EJBException();
ejbEx.initCause(inv.exception);
throw ejbEx;
}
}
return returnValue;
} finally {
container.onLeavingContainer();
}
}
}
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