| /* |
| * Copyright 1999-2004 The Apache Software Foundation. |
| * |
| * Licensed 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.cocoon.components.web3.impl; |
| |
| import org.apache.avalon.framework.logger.AbstractLogEnabled; |
| import org.apache.avalon.framework.configuration.Configuration; |
| import org.apache.avalon.framework.configuration.ConfigurationException; |
| import org.apache.avalon.framework.service.ServiceException; |
| import org.apache.avalon.framework.service.ServiceManager; |
| import org.apache.avalon.framework.thread.ThreadSafe; |
| |
| import EDU.oswego.cs.dl.util.concurrent.Mutex; |
| |
| import com.sap.mw.jco.JCO; |
| |
| import org.apache.cocoon.components.web3.Web3Client; |
| import org.apache.cocoon.components.web3.Web3DataSource; |
| |
| /** |
| * The Default implementation for R3DataSources in Web3. This uses the |
| * normal <code>com.sap.mw.jco.JCO</code> classes. |
| * |
| * @author <a href="mailto:michael.gerzabek@at.efp.cc">Michael Gerzabek</a> |
| * @since 2.1 |
| * @version CVS $Id: Web3DataSourceImpl.java,v 1.6 2004/03/05 13:02:25 bdelacretaz Exp $ |
| */ |
| public class Web3DataSourceImpl extends AbstractLogEnabled |
| implements Web3DataSource, ThreadSafe { |
| |
| protected Web3Properties properties = null; |
| protected int poolsize = 0; |
| protected int current_clients = 0; |
| protected String mySID = null; |
| |
| protected boolean trace = false; |
| protected int level = 0; |
| |
| private static Mutex lock = new Mutex(); |
| protected ServiceManager manager; |
| |
| public void service(ServiceManager manager) throws ServiceException { |
| this.manager = manager; |
| } |
| |
| /** Configure backend component */ |
| public void configure(final Configuration configuration) |
| throws ConfigurationException { |
| if (null != configuration) { |
| this.properties = new Web3Properties (); |
| Configuration child = configuration.getChild("pool"); |
| this.trace = child.getAttributeAsBoolean("trace", false); |
| this.level = child.getAttributeAsInteger("level", 0); |
| this.mySID = configuration.getAttribute("name"); |
| this.poolsize = child.getAttributeAsInteger("size"); |
| |
| this.properties.put("jco.client.client", |
| child.getChild("client").getValue()); |
| this.properties.put("jco.client.user", |
| child.getChild("user").getValue()); |
| this.properties.put("jco.client.passwd", |
| child.getChild("password").getValue()); |
| this.properties.put("jco.client.ashost", |
| child.getChild("route").getValue()); |
| this.properties.put("jco.client.sysnr", |
| child.getChild("system").getValue()); |
| this.properties.put("sap.gateway", |
| child.getChild("gateway").getValue("")); |
| this.properties.put("sap.programid", |
| child.getChild("program-id").getValue("")); |
| |
| if ( getLogger().isDebugEnabled() ) { |
| getLogger ().debug ("Configure R3DataSource [mySID=" |
| + this.mySID ); |
| } |
| } else { |
| getLogger ().error ("Couldn't configure Web3DataSource." + |
| " No configuration provided!"); |
| } |
| } |
| |
| /** initialize the component */ |
| public void initialize() throws Exception { |
| try { |
| Web3DataSourceImpl.lock.acquire(); |
| JCO.addClientPool( this.mySID, this.poolsize, this.properties ); |
| JCO.getClientPoolManager().getPool( this.mySID ).setTrace( this.trace ); |
| JCO.setTraceLevel( this.level ); |
| } catch (Exception ex) { |
| getLogger ().error ("Couldn't initialize Web3DataSource " |
| + this.mySID, ex); |
| throw new Exception ( ex.getMessage() + this.mySID ); |
| } |
| finally { |
| Web3DataSourceImpl.lock.release(); |
| } |
| } |
| |
| /** Get the backend client, returns <code>null</code> if there is no more |
| client in the pool. */ |
| public Web3Client getWeb3Client() throws Exception { |
| Web3Client theClient = null; |
| if ( this.current_clients + 1 < this.poolsize ) { |
| this.current_clients++; |
| try { |
| Web3DataSourceImpl.lock.acquire(); |
| theClient = (Web3Client) this.manager.lookup( Web3Client.ROLE ); |
| theClient.initClient (JCO.getClient(this.mySID)); |
| |
| if ( getLogger().isDebugEnabled() ) { |
| getLogger ().debug ("returning client " + theClient); |
| } |
| } catch (Exception ex){ |
| getLogger ().error ( this.mySID, ex); |
| throw new Exception ( ex.getMessage() ); |
| } finally { |
| Web3DataSourceImpl.lock.release(); |
| } |
| } |
| return theClient; |
| } |
| |
| public void releaseWeb3Client(Web3Client client) { |
| try { |
| Web3DataSourceImpl.lock.acquire(); |
| client.releaseClient(); |
| this.current_clients--; |
| manager.release( client ); |
| } |
| catch (Exception x) { |
| getLogger().error( x.getMessage(), x); |
| } |
| finally { |
| Web3DataSourceImpl.lock.release(); |
| } |
| } |
| |
| /** Dispose properly of the pool */ |
| public void dispose() { |
| try { |
| JCO.removeClientPool(this.mySID); |
| } catch (Exception ex) { |
| getLogger ().error ("Web3DataSource: couldn't" + |
| " return Web3DataSource", ex); |
| } |
| this.properties = null; |
| this.mySID = null; |
| getLogger ().debug ("Web3DataSource disposed."); |
| } |
| |
| } |