| /***************************************************************** |
| * 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.cayenne.rop; |
| |
| import org.apache.cayenne.CayenneRuntimeException; |
| import org.apache.cayenne.di.BeforeScopeEnd; |
| import org.apache.cayenne.event.EventBridge; |
| import org.apache.cayenne.event.EventBridgeFactory; |
| import org.apache.cayenne.remote.BaseConnection; |
| import org.apache.cayenne.remote.ClientMessage; |
| import org.apache.cayenne.remote.RemoteService; |
| import org.apache.cayenne.remote.RemoteSession; |
| |
| import java.rmi.RemoteException; |
| |
| public class HttpClientConnection extends BaseConnection { |
| |
| private RemoteService remoteService; |
| private RemoteSession session; |
| |
| private String sharedSessionName; |
| |
| public HttpClientConnection(RemoteService remoteService, String sharedSession) { |
| this.remoteService = remoteService; |
| this.sharedSessionName = sharedSession; |
| } |
| |
| public RemoteSession getSession() { |
| return session; |
| } |
| |
| @Override |
| protected void beforeSendMessage(ClientMessage message) throws CayenneRuntimeException { |
| if (session == null) { |
| connect(); |
| } |
| } |
| |
| @Override |
| protected Object doSendMessage(ClientMessage message) throws CayenneRuntimeException { |
| try { |
| return remoteService.processMessage(message); |
| } |
| catch (CayenneRuntimeException e) { |
| throw e; |
| } |
| catch (Throwable th) { |
| throw new CayenneRuntimeException(th.getMessage(), th); |
| } |
| } |
| |
| @Override |
| public EventBridge getServerEventBridge() throws CayenneRuntimeException { |
| if (session == null) { |
| connect(); |
| } |
| |
| return createServerEventBridge(session); |
| } |
| |
| @BeforeScopeEnd |
| public void shutdown() throws RemoteException { |
| remoteService.close(); |
| } |
| |
| protected synchronized void connect() { |
| if (session != null) { |
| return; |
| } |
| |
| long t0 = System.currentTimeMillis(); |
| |
| // create server session... |
| try { |
| this.session = (sharedSessionName != null) ? remoteService |
| .establishSharedSession(sharedSessionName) : remoteService |
| .establishSession(); |
| } |
| catch (Throwable th) { |
| logger.info(th.getMessage(), th); |
| throw new CayenneRuntimeException(th.getMessage(), th); |
| } |
| |
| if (logger.isInfoEnabled()) { |
| long time = System.currentTimeMillis() - t0; |
| logger.info("=== Connected, session: " |
| + session |
| + " - took " |
| + time |
| + " ms."); |
| } |
| } |
| |
| /** |
| * Creates an EventBridge that will listen for server events. Returns null if server |
| * events support is not configured in the descriptor. |
| * |
| * @throws CayenneRuntimeException if EventBridge startup fails for any reason. |
| */ |
| protected EventBridge createServerEventBridge(RemoteSession session) throws CayenneRuntimeException { |
| |
| if (!session.isServerEventsEnabled()) { |
| return null; |
| } |
| |
| try { |
| EventBridgeFactory factory = (EventBridgeFactory) Class.forName(session.getEventBridgeFactory()) |
| .newInstance(); |
| |
| // must use "name", not the sessionId as an external subject for the |
| // event bridge |
| return factory.createEventBridge(RemoteSession.getSubjects(), session.getName(), |
| session.getEventBridgeParameters()); |
| } catch (Exception ex) { |
| throw new CayenneRuntimeException("Error creating EventBridge.", ex); |
| } |
| } |
| } |