| /******************************************************************************* |
| * 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.ofbiz.entity.datasource; |
| |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| import org.ofbiz.base.util.Debug; |
| import org.ofbiz.base.util.UtilValidate; |
| import org.ofbiz.entity.config.model.Datasource; |
| import org.ofbiz.entity.config.EntityConfigUtil; |
| |
| /** |
| * Generic Entity Helper Factory Class |
| * |
| */ |
| public class GenericHelperFactory { |
| |
| public static final String module = GenericHelperFactory.class.getName(); |
| |
| // protected static UtilCache helperCache = new UtilCache("entity.GenericHelpers", 0, 0); |
| protected static Map<String, GenericHelper> helperCache = new HashMap<String, GenericHelper>(); |
| |
| public static GenericHelper getHelper(GenericHelperInfo helperInfo) { |
| GenericHelper helper = helperCache.get(helperInfo.getHelperFullName()); |
| |
| if (helper == null) { // don't want to block here |
| synchronized (GenericHelperFactory.class) { |
| // must check if null again as one of the blocked threads can still enter |
| helper = helperCache.get(helperInfo.getHelperFullName()); |
| if (helper == null) { |
| try { |
| Datasource datasourceInfo = EntityConfigUtil.getDatasource(helperInfo.getHelperBaseName()); |
| |
| if (datasourceInfo == null) { |
| throw new IllegalStateException("Could not find datasource definition with name " + helperInfo.getHelperBaseName()); |
| } |
| String helperClassName = datasourceInfo.getHelperClass(); |
| Class<?> helperClass = null; |
| |
| if (UtilValidate.isNotEmpty(helperClassName)) { |
| try { |
| ClassLoader loader = Thread.currentThread().getContextClassLoader(); |
| helperClass = loader.loadClass(helperClassName); |
| } catch (ClassNotFoundException e) { |
| Debug.logWarning(e, module); |
| throw new IllegalStateException("Error loading GenericHelper class \"" + helperClassName + "\": " + e.getMessage()); |
| } |
| } |
| |
| Class<?>[] paramTypes = new Class<?>[] {GenericHelperInfo.class}; |
| Object[] params = new Object[] {helperInfo}; |
| |
| java.lang.reflect.Constructor<?> helperConstructor = null; |
| |
| if (helperClass != null) { |
| try { |
| helperConstructor = helperClass.getConstructor(paramTypes); |
| } catch (NoSuchMethodException e) { |
| Debug.logWarning(e, module); |
| throw new IllegalStateException("Error loading GenericHelper class \"" + helperClassName + "\": " + e.getMessage()); |
| } |
| } |
| try { |
| helper = (GenericHelper) helperConstructor.newInstance(params); |
| } catch (IllegalAccessException e) { |
| Debug.logWarning(e, module); |
| throw new IllegalStateException("Error loading GenericHelper class \"" + helperClassName + "\": " + e.getMessage()); |
| } catch (InstantiationException e) { |
| Debug.logWarning(e, module); |
| throw new IllegalStateException("Error loading GenericHelper class \"" + helperClassName + "\": " + e.getMessage()); |
| } catch (java.lang.reflect.InvocationTargetException e) { |
| Debug.logWarning(e, module); |
| throw new IllegalStateException("Error loading GenericHelper class \"" + helperClassName + "\": " + e.getMessage()); |
| } |
| |
| if (helper != null) |
| helperCache.put(helperInfo.getHelperFullName(), helper); |
| } catch (SecurityException e) { |
| Debug.logError(e, module); |
| throw new IllegalStateException("Error loading GenericHelper class: " + e.toString()); |
| } |
| } |
| } |
| } |
| return helper; |
| } |
| } |