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* 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.tuscany.sca.host.corba.jee;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.rmi.PortableRemoteObject;
import org.apache.tuscany.sca.host.corba.CorbaHost;
import org.apache.tuscany.sca.host.corba.CorbaHostException;
import org.apache.tuscany.sca.host.corba.CorbaHostUtils;
import org.apache.tuscany.sca.host.corba.CorbanameURL;
import org.omg.CORBA.ORB;
import org.omg.CORBA.Object;
import org.omg.CosNaming.NameComponent;
import org.omg.CosNaming.NamingContext;
import org.omg.CosNaming.NamingContextExt;
import org.omg.CosNaming.NamingContextExtHelper;
import org.omg.CosNaming.NamingContextHelper;
import org.omg.CosNaming.NamingContextPackage.InvalidName;
import org.omg.CosNaming.NamingContextPackage.NotFound;
/**
* @version $Rev: 685909 $ $Date: 2008-08-14 15:17:15 +0100 (Thu, 14 Aug 2008) $
* Implementation of JEE CORBA host
*/
public class JEECorbaHost implements CorbaHost {
public static final String ORB_NAME = "java:comp/ORB";
private List<String> registeredServants = Collections.synchronizedList(new ArrayList<String>());
private ORB orb;
private void registerURI(String uri) {
registeredServants.add(uri);
}
private void removeURI(String uri) {
registeredServants.remove(uri);
}
private NamingContextExt getNamingContext(String nameService) throws Exception {
org.omg.CORBA.Object objRef = orb.resolve_initial_references(nameService);
return NamingContextExtHelper.narrow(objRef);
}
private void handleException(Exception e) throws CorbaHostException {
// The cause of the Exception is JDK specific
if (e instanceof NotFound) {
throw new CorbaHostException(CorbaHostException.NO_SUCH_OBJECT, e);
} else if (e instanceof InvalidName) {
throw new CorbaHostException(e);
} else {
throw new CorbaHostException(e);
}
}
public void registerServant(String uri, Object servantObject) throws CorbaHostException {
CorbanameURL details = CorbaHostUtils.getServiceDetails(uri);
try {
NamingContext namingCtx = getNamingContext(details.getNameService());
for (int i = 0; i < details.getNamePath().size() - 1; i++) {
NameComponent nc = new NameComponent(details.getNamePath().get(i), "");
NameComponent[] path = new NameComponent[] {nc};
try {
namingCtx = NamingContextHelper.narrow(namingCtx.resolve(path));
} catch (Exception e) {
namingCtx = namingCtx.bind_new_context(path);
}
}
NameComponent finalName =
new NameComponent(details.getNamePath().get(details.getNamePath().size() - 1), "");
try {
namingCtx.resolve(new NameComponent[] {finalName});
// no exception means that some object is already registered
// under this name, we need to crash here
throw new CorbaHostException(CorbaHostException.BINDING_IN_USE);
} catch (NotFound e) {
namingCtx.bind(new NameComponent[] {finalName}, servantObject);
registerURI(uri);
}
} catch (CorbaHostException e) {
throw e;
} catch (Exception e) {
handleException(e);
}
}
public void unregisterServant(String uri) throws CorbaHostException {
CorbanameURL details = CorbaHostUtils.getServiceDetails(uri);
try {
NamingContextExt namingCtx = getNamingContext(details.getNameService());
namingCtx.unbind(namingCtx.to_name(details.getName()));
removeURI(uri);
} catch (Exception e) {
handleException(e);
}
}
public Object lookup(String uri) throws CorbaHostException {
Object result = null;
try {
CorbanameURL url = new CorbanameURL(uri);
NamingContextExt context = getNamingContext(url.getNameService());
result = context.resolve_str(url.getName());
} catch (Exception e) {
// e.printStackTrace();
handleException(e);
}
if (result == null) {
throw new CorbaHostException(CorbaHostException.NO_SUCH_OBJECT);
}
return result;
}
// obtain ORB from environment
public void start() throws CorbaHostException {
Context ctx;
try {
ctx = new InitialContext();
orb = (ORB)PortableRemoteObject.narrow(ctx.lookup(ORB_NAME), org.omg.CORBA.ORB.class);
} catch (Exception e) {
throw new CorbaHostException(e);
}
}
// unregister registered servants
public void stop() {
// use copy because unregisterServant(...) method removes from
// registeredServants collection
List<String> rsCopy = new ArrayList<String>(registeredServants);
for (String servantURI : rsCopy) {
try {
unregisterServant(servantURI);
} catch (Exception e) {
e.printStackTrace();
}
}
}
}