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package com.sun.enterprise.webservice;
import java.util.Hashtable;
import java.util.Iterator;
import java.lang.reflect.Proxy;
import java.lang.reflect.InvocationHandler;
import java.rmi.Remote;
import javax.servlet.ServletConfig;
import javax.servlet.ServletContext;
import javax.xml.rpc.server.ServiceLifecycle;
import com.sun.enterprise.Switch;
import com.sun.enterprise.ComponentInvocation;
import com.sun.enterprise.InvocationManager;
// JAXRPC-RI classes
import com.sun.xml.rpc.spi.JaxRpcObjectFactory;
import com.sun.xml.rpc.spi.runtime.Implementor;
import com.sun.xml.rpc.spi.runtime.ImplementorCache;
import com.sun.xml.rpc.spi.runtime.ImplementorCacheDelegate;
import com.sun.xml.rpc.spi.runtime.RuntimeEndpointInfo;
import com.sun.xml.rpc.spi.runtime.Tie;
/**
* This class extends the behavior of ImplementorCache in order to
* interpose on lifecycle events for the creation and destruction of
* ties/servants for servlet web service endpoints.
*
* @author Kenneth Saks
*/
public class ImplementorCacheDelegateImpl extends ImplementorCacheDelegate {
private Hashtable implementorCache_;
private ServletContext servletContext_;
private JaxRpcObjectFactory rpcFactory_;
public ImplementorCacheDelegateImpl(ServletConfig servletConfig) {
servletContext_ = servletConfig.getServletContext();
implementorCache_ = new Hashtable();
rpcFactory_ = JaxRpcObjectFactory.newInstance();
}
public Implementor getImplementorFor(RuntimeEndpointInfo targetEndpoint) {
Implementor implementor = null;
try {
synchronized(targetEndpoint) {
implementor = (Implementor)
implementorCache_.get(targetEndpoint);
if( implementor == null ) {
implementor = createImplementor(targetEndpoint);
implementorCache_.put(targetEndpoint, implementor);
}
}
InvocationManager invManager =
Switch.getSwitch().getInvocationManager();
ComponentInvocation inv = invManager.getCurrentInvocation();
inv.setWebServiceTie(implementor.getTie());
} catch(Throwable t) {
/* XXX FIXME
JAXRPCServletException jse = new JAXRPCServletException
("error.implementorFactory.newInstanceFailed",
targetEndpoint.getName());
jse.initCause(t);
throw jse;
*/
RuntimeException re = new RuntimeException();
re.initCause(t);
throw re;
}
return implementor;
}
public void releaseImplementor(RuntimeEndpointInfo targetEndpoint,
Implementor implementor) {
// do nothing
}
public void destroy() {
for (Iterator iter = implementorCache_.values().iterator();
iter.hasNext();) {
Implementor implementor = (Implementor) iter.next();
try {
implementor.destroy();
} catch(Throwable t) {
// @@@ log
}
}
implementorCache_.clear();
}
private Implementor createImplementor(RuntimeEndpointInfo targetEndpoint)
throws Exception {
Tie tie = (Tie) targetEndpoint.getTieClass().newInstance();
Class seiClass = targetEndpoint.getRemoteInterface();
Class implClass = targetEndpoint.getImplementationClass();
Remote servant = null;
if( seiClass.isAssignableFrom(implClass) ) {
// if servlet endpoint impl is a subtype of SEI, use an
// instance as the servant.
servant = (Remote) implClass.newInstance();
} else {
// Create a dynamic proxy that implements SEI (and optionally
// ServiceLifecycle) and delegates to an instance of the
// endpoint impl.
Object implInstance = implClass.newInstance();
InvocationHandler handler =
new ServletImplInvocationHandler(implInstance);
boolean implementsLifecycle =
ServiceLifecycle.class.isAssignableFrom(implClass);
Class[] proxyInterfaces = implementsLifecycle ?
new Class[] { seiClass, ServiceLifecycle.class } :
new Class[] { seiClass };
servant = (Remote) Proxy.newProxyInstance
(implClass.getClassLoader(), proxyInterfaces, handler);
}
tie.setTarget(servant);
Implementor implementor = rpcFactory_.createImplementor(servletContext_, tie);
implementor.init();
return implementor;
}
}