From e5b7380c874745c989d1816b8f552504f038e1bc Mon Sep 17 00:00:00 2001 From: lresende Date: Thu, 26 Sep 2013 20:33:20 +0000 Subject: 2.0 branch for possible maintenance release git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@1526672 13f79535-47bb-0310-9956-ffa450edef68 --- .../host/corba/jse/tns/TnsDefaultCorbaHost.java | 120 +++++++++++++++++++++ 1 file changed, 120 insertions(+) create mode 100644 sca-java-2.x/branches/2.0/modules/host-corba-jse-tns/src/main/java/org/apache/tuscany/sca/host/corba/jse/tns/TnsDefaultCorbaHost.java (limited to 'sca-java-2.x/branches/2.0/modules/host-corba-jse-tns/src/main/java/org/apache/tuscany/sca/host/corba/jse/tns/TnsDefaultCorbaHost.java') diff --git a/sca-java-2.x/branches/2.0/modules/host-corba-jse-tns/src/main/java/org/apache/tuscany/sca/host/corba/jse/tns/TnsDefaultCorbaHost.java b/sca-java-2.x/branches/2.0/modules/host-corba-jse-tns/src/main/java/org/apache/tuscany/sca/host/corba/jse/tns/TnsDefaultCorbaHost.java new file mode 100644 index 0000000000..4a395631b1 --- /dev/null +++ b/sca-java-2.x/branches/2.0/modules/host-corba-jse-tns/src/main/java/org/apache/tuscany/sca/host/corba/jse/tns/TnsDefaultCorbaHost.java @@ -0,0 +1,120 @@ +/* + * 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.jse.tns; + +import java.util.Map; +import java.util.concurrent.ConcurrentHashMap; +import java.util.logging.Logger; + +import org.apache.tuscany.sca.core.LifeCycleListener; +import org.apache.tuscany.sca.host.corba.CorbaHost; +import org.apache.tuscany.sca.host.corba.CorbaHostException; +import org.apache.tuscany.sca.host.corba.CorbanameURL; +import org.apache.tuscany.sca.host.corba.SocketUtil; +import org.apache.tuscany.sca.host.corba.jse.DefaultCorbaHost; +import org.apache.tuscany.sca.host.corba.naming.TransientNameServer; +import org.apache.tuscany.sca.host.corba.naming.TransientNameService; +import org.omg.CORBA.Object; + +/** + * @version $Rev$ $Date$ + * Default implementation of CORBA host + */ +public class TnsDefaultCorbaHost implements CorbaHost, LifeCycleListener { + + private static final Logger logger = Logger.getLogger(TnsDefaultCorbaHost.class.getName()); + private Map localServers = new ConcurrentHashMap(); + private Map clientsCount = new ConcurrentHashMap(); + private CorbaHost targetHost = new DefaultCorbaHost(); + + public void registerServant(String uri, Object servantObject) throws CorbaHostException { + CorbanameURL details = new CorbanameURL(uri); + if (SocketUtil.isLocalhost(details.getHost())) { + createLocalNameServer(details.getPort()); + } + targetHost.registerServant(uri, servantObject); + } + + public void unregisterServant(String uri) throws CorbaHostException { + targetHost.unregisterServant(uri); + CorbanameURL details = new CorbanameURL(uri); + if (SocketUtil.isLocalhost(details.getHost())) { + releaseLocalNameServer(details.getPort()); + } + } + + public Object lookup(String uri) throws CorbaHostException { + return targetHost.lookup(uri); + } + + /** + * Starts transient name server under given port. If TNS was previously + * spawned it increments clients counter. + */ + synchronized private void createLocalNameServer(int port) throws CorbaHostException { + int useCount = clientsCount.containsKey(port) ? clientsCount.get(port) : 0; + // no server previously spawned + if (useCount == 0) { + TransientNameServer server = + new TransientNameServer("localhost", port, TransientNameService.DEFAULT_SERVICE_NAME); + Thread thread = server.start(); + if (thread == null) { + throw new CorbaHostException("TransientNameServer couldn't be started"); + } else { + localServers.put(port, server); + } + } + clientsCount.put(port, ++useCount); + } + + /** + * Stops transient name server if there is only one client left using such + * TNS. Decrements clients counter if TNS is used by 2 or more clients. + */ + synchronized private void releaseLocalNameServer(int port) throws CorbaHostException { + int useCount = clientsCount.containsKey(port) ? clientsCount.get(port) : 0; + if (useCount == 1) { + // last client executed stop, cleaning up + TransientNameServer server = localServers.get(port); + if (server != null) { + server.stop(); + clientsCount.remove(port); + localServers.remove(port); + } else { + logger.warning("Local name server on port " + port + " was null!"); + } + } else if (useCount > 1) { + clientsCount.put(port, --useCount); + } else { + logger.warning("Tried to release non existing local name server on port " + port); + } + + } + + public void stop() { + for (TransientNameServer tns : localServers.values()) { + tns.stop(); + } + } + + public void start() { + } + +} -- cgit v1.2.3