| /* |
| * 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.ofbiz.entity; |
| |
| import java.util.concurrent.Callable; |
| import java.util.concurrent.ConcurrentHashMap; |
| import java.util.concurrent.ExecutionException; |
| import java.util.concurrent.Future; |
| import java.util.concurrent.FutureTask; |
| import java.util.concurrent.ScheduledExecutorService; |
| |
| import org.apache.ofbiz.base.concurrent.ExecutionPool; |
| |
| import org.apache.ofbiz.base.lang.Factory; |
| import org.apache.ofbiz.base.util.Debug; |
| import org.apache.ofbiz.base.util.UtilObject; |
| |
| /** <code>Delegator</code> factory abstract class. */ |
| public abstract class DelegatorFactory implements Factory<Delegator, String> { |
| public static final String module = DelegatorFactory.class.getName(); |
| private static final ConcurrentHashMap<String, Future<Delegator>> delegators = new ConcurrentHashMap<String, Future<Delegator>>(); |
| private static final ThreadGroup DELEGATOR_THREAD_GROUP = new ThreadGroup("DelegatorFactory"); |
| private static final ScheduledExecutorService executor = ExecutionPool.getScheduledExecutor(DELEGATOR_THREAD_GROUP, "delegator-startup", Runtime.getRuntime().availableProcessors(), 10, true); |
| |
| public static Delegator getDelegator(String delegatorName) { |
| Future<Delegator> future = getDelegatorFuture(delegatorName); |
| try { |
| return future.get(); |
| } catch (ExecutionException e) { |
| Debug.logError(e, module); |
| return null; |
| } catch (InterruptedException e) { |
| Debug.logError(e, module); |
| return null; |
| } |
| } |
| |
| public static Future<Delegator> getDelegatorFuture(String delegatorName) { |
| if (delegatorName == null) { |
| delegatorName = "default"; |
| //Debug.logWarning(new Exception("Location where getting delegator with null name"), "Got a getGenericDelegator call with a null delegatorName, assuming default for the name.", module); |
| } |
| do { |
| Future<Delegator> future = delegators.get(delegatorName); |
| if (future != null) { |
| //Debug.logInfo("got delegator(future(" + delegatorName + ")) from cache", module); |
| return future; |
| } |
| FutureTask<Delegator> futureTask = new FutureTask<Delegator>(new DelegatorConfigurable(delegatorName)); |
| //Debug.logInfo("putting delegator(future(" + delegatorName + ")) into cache", module); |
| if (delegators.putIfAbsent(delegatorName, futureTask) != null) { |
| continue; |
| } |
| executor.submit(futureTask); |
| } while (true); |
| } |
| |
| public static final class DelegatorConfigurable implements Callable<Delegator> { |
| private final String delegatorName; |
| |
| public DelegatorConfigurable(String delegatorName) { |
| this.delegatorName = delegatorName; |
| } |
| |
| public Delegator call() throws ClassNotFoundException { |
| try { |
| Delegator delegator = UtilObject.getObjectFromFactory(DelegatorFactory.class, delegatorName); |
| |
| // setup the Entity ECA Handler |
| delegator.initEntityEcaHandler(); |
| |
| // setup the distributed CacheClear |
| delegator.initDistributedCacheClear(); |
| |
| return delegator; |
| } catch (ClassNotFoundException e) { |
| Debug.logError(e, module); |
| throw e; |
| } |
| } |
| } |
| } |