| package org.apache.turbine.om; |
| |
| /* |
| * 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. |
| */ |
| |
| import java.util.concurrent.ConcurrentHashMap; |
| import java.util.concurrent.ConcurrentMap; |
| |
| import org.apache.fulcrum.pool.Recyclable; |
| import org.apache.turbine.Turbine; |
| import org.apache.turbine.services.pull.ApplicationTool; |
| |
| /** |
| * A Pull tool to make om objects available to a template |
| * |
| * @author <a href="mailto:jmcnally@collab.net">John D. McNally</a> |
| * @author <a href="mailto:hps@intermeta.de">Henning P. Schmiedehausen</a> |
| * @version $Id$ |
| * |
| * @deprecated This class is probably not used anymore, it may have been intended for cacheable Torque OM or might be used with Fulcrum Security Torque. |
| */ |
| @Deprecated |
| public class OMTool implements ApplicationTool, Recyclable |
| { |
| protected ConcurrentMap<String, Object> omMap; |
| |
| // note the following could be a static attribute to reduce memory |
| // footprint. Might require a service to front load the |
| // PullHelpers to avoid MT issues. A multiple write is not so bad |
| // though |
| |
| /** The cache of PullHelpers. **/ |
| private ConcurrentMap<String, OMTool.PullHelper> pullMap = |
| new ConcurrentHashMap<>(); |
| |
| /** |
| * The Factory responsible for retrieving the |
| * objects from storage |
| */ |
| protected RetrieverFactory omFactory; |
| |
| /** |
| * Default constructor |
| * @throws Exception if creating the factory fails |
| */ |
| public OMTool() throws Exception |
| { |
| omMap = new ConcurrentHashMap<>(); |
| String className = Turbine.getConfiguration().getString("tool.om.factory"); |
| this.omFactory = (RetrieverFactory)Class.forName(className).newInstance(); |
| } |
| |
| /** |
| * Prepares tool for a single request |
| * |
| * @param data the initialization data |
| */ |
| @Override |
| public void init(Object data) |
| { |
| // data = (RunData)data; |
| } |
| |
| /** |
| * Implementation of ApplicationTool interface is not needed for this |
| * method as the tool is request scoped |
| */ |
| @Override |
| public void refresh() |
| { |
| // empty |
| } |
| |
| /** |
| * Inner class to present a nice interface to the template designer |
| */ |
| protected class PullHelper |
| { |
| String omName; |
| |
| protected PullHelper(String omName) |
| { |
| this.omName = omName; |
| } |
| |
| public Object setKey(String key) |
| throws Exception |
| { |
| Object om = null; |
| String inputKey = omName + key; |
| |
| if (omMap.containsKey(inputKey)) |
| { |
| om = omMap.get(inputKey); |
| } |
| else |
| { |
| om = omFactory.getInstance(omName).retrieve(key); |
| omMap.put(inputKey, om); |
| } |
| |
| return om; |
| } |
| } |
| |
| /** |
| * Get the {@link PullHelper} object with the given name |
| * @param omName the object name |
| * @return the PullHelper |
| * @throws Exception if retrieving the object fails |
| */ |
| public PullHelper get(String omName) throws Exception |
| { |
| PullHelper ph = pullMap.putIfAbsent(omName, new OMTool.PullHelper(omName)); |
| if (ph == null) |
| { |
| return pullMap.get(omName); |
| } |
| |
| return ph; |
| } |
| |
| /** |
| * Get the object with the given name and key |
| * @param omName the object name |
| * @param key the object key |
| * @return the object |
| * @throws Exception if retrieving the object fails |
| */ |
| public Object get(String omName, String key) throws Exception |
| { |
| return get(omName).setKey(key); |
| } |
| |
| // ****************** Recyclable implementation ************************ |
| |
| private boolean disposed; |
| |
| /** |
| * Recycles the object for a new client. Recycle methods with |
| * parameters must be added to implementing object and they will be |
| * automatically called by pool implementations when the object is |
| * taken from the pool for a new client. The parameters must |
| * correspond to the parameters of the constructors of the object. |
| * For new objects, constructors can call their corresponding recycle |
| * methods whenever applicable. |
| * The recycle methods must call their super. |
| */ |
| @Override |
| public void recycle() |
| { |
| disposed = false; |
| } |
| |
| /** |
| * Disposes the object after use. The method is called |
| * when the object is returned to its pool. |
| * The dispose method must call its super. |
| */ |
| @Override |
| public void dispose() |
| { |
| omMap.clear(); |
| disposed = true; |
| } |
| |
| /** |
| * Checks whether the recyclable has been disposed. |
| * @return true, if the recyclable is disposed. |
| */ |
| @Override |
| public boolean isDisposed() |
| { |
| return disposed; |
| } |
| } |