| /* |
| * Copyright (c) 1997, 2018 Oracle and/or its affiliates. All rights reserved. |
| * |
| * This program and the accompanying materials are made available under the |
| * terms of the Eclipse Public License v. 2.0, which is available at |
| * http://www.eclipse.org/legal/epl-2.0. |
| * |
| * This Source Code may also be made available under the following Secondary |
| * Licenses when the conditions for such availability set forth in the |
| * Eclipse Public License v. 2.0 are satisfied: GNU General Public License, |
| * version 2 with the GNU Classpath Exception, which is available at |
| * https://www.gnu.org/software/classpath/license.html. |
| * |
| * SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0 |
| */ |
| |
| package com.sun.enterprise.resource.pool.datastructure; |
| |
| import com.sun.appserv.connectors.internal.api.PoolingException; |
| import com.sun.enterprise.resource.pool.ResourceHandler; |
| import com.sun.logging.LogDomains; |
| |
| import java.lang.reflect.Constructor; |
| import java.security.AccessController; |
| import java.security.PrivilegedAction; |
| import java.util.logging.Level; |
| import java.util.logging.Logger; |
| |
| /** |
| * Factory to create appropriate datastructure type for the pool<br> |
| * |
| * @author Jagadish Ramu |
| */ |
| public class DataStructureFactory { |
| //TODO synchronize datastructure creation ? |
| protected final static Logger _logger = LogDomains.getLogger(DataStructureFactory.class,LogDomains.RSR_LOGGER); |
| |
| public static DataStructure getDataStructure(String className, String parameters, int maxPoolSize, |
| ResourceHandler handler, String strategyClass) throws PoolingException { |
| DataStructure ds; |
| |
| if (className != null) { |
| if(className.equals(ListDataStructure.class.getName())){ |
| ds = new ListDataStructure(parameters, maxPoolSize, handler, strategyClass); |
| }else if(className.equals(RWLockDataStructure.class.getName())){ |
| ds = new RWLockDataStructure(parameters, maxPoolSize, handler, strategyClass); |
| }else{ |
| ds = initializeCustomDataStructureInPrivilegedMode(className, parameters, maxPoolSize, handler, strategyClass); |
| } |
| } else { |
| debug("Initializing RWLock DataStructure"); |
| ds = new RWLockDataStructure(parameters, maxPoolSize, handler, strategyClass); |
| } |
| return ds; |
| } |
| |
| private static DataStructure initializeCustomDataStructureInPrivilegedMode(final String className, |
| final String parameters, |
| final int maxPoolSize, |
| final ResourceHandler handler, |
| final String strategyClass) |
| throws PoolingException { |
| Object result = AccessController.doPrivileged(new PrivilegedAction() { |
| public Object run() { |
| |
| Object result = null; |
| try { |
| result = initializeDataStructure(className, parameters, maxPoolSize, handler, strategyClass); |
| } catch (Exception e) { |
| _logger.log(Level.WARNING, "pool.datastructure.init.failure", className); |
| _logger.log(Level.WARNING, "pool.datastructure.init.failure.exception", e); |
| } |
| return result; |
| } |
| }); |
| if (result != null) { |
| return (DataStructure) result; |
| } else { |
| throw new PoolingException("Unable to initalize custom DataStructure : " + className); |
| } |
| } |
| |
| private static DataStructure initializeDataStructure(String className, String parameters, int maxPoolSize, |
| ResourceHandler handler, String strategyClass) throws Exception { |
| DataStructure ds; |
| Object[] constructorParameters = new Object[]{parameters, maxPoolSize, handler, strategyClass}; |
| |
| Class class1 = Thread.currentThread().getContextClassLoader().loadClass(className); |
| Constructor constructor = class1.getConstructor(String.class, int.class, ResourceHandler.class, String.class); |
| ds = (DataStructure) constructor.newInstance(constructorParameters); |
| if(_logger.isLoggable(Level.FINEST)) { |
| _logger.log(Level.FINEST, "Using Pool Data Structure : ", className); |
| } |
| return ds; |
| } |
| |
| private static void debug(String debugStatement) { |
| if(_logger.isLoggable(Level.FINE)) { |
| _logger.log(Level.FINE, debugStatement); |
| } |
| } |
| } |