Author: dblevins
Date: Mon Aug 22 04:38:48 2011
New Revision: 1160103
URL: http://svn.apache.org/viewvc?rev=1160103&view=rev
Log:
Slightly optimized version of the OWB LoaderService. Cuts out the
ServiceLoader call where possible
Added:
openejb/trunk/openejb3/container/openejb-core/src/main/java/org/apache/openejb/cdi/OptimizedLoaderService.java
Added:
openejb/trunk/openejb3/container/openejb-core/src/main/java/org/apache/openejb/cdi/OptimizedLoaderService.java
URL:
http://svn.apache.org/viewvc/openejb/trunk/openejb3/container/openejb-core/src/main/java/org/apache/openejb/cdi/OptimizedLoaderService.java?rev=1160103&view=auto
==============================================================================
---
openejb/trunk/openejb3/container/openejb-core/src/main/java/org/apache/openejb/cdi/OptimizedLoaderService.java
(added)
+++
openejb/trunk/openejb3/container/openejb-core/src/main/java/org/apache/openejb/cdi/OptimizedLoaderService.java
Mon Aug 22 04:38:48 2011
@@ -0,0 +1,84 @@
+/**
+ * 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.openejb.cdi;
+
+import org.apache.openejb.util.LogCategory;
+import org.apache.openejb.util.Logger;
+import org.apache.webbeans.service.DefaultLoaderService;
+import org.apache.webbeans.spi.LoaderService;
+import org.apache.webbeans.spi.plugins.OpenWebBeansPlugin;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * @version $Rev$ $Date$
+ */
+public class OptimizedLoaderService implements LoaderService {
+
+ private static final Logger log =
Logger.getInstance(LogCategory.OPENEJB.createChild("cdi"),
OptimizedLoaderService.class);
+
+ private final LoaderService loaderService;
+
+ public OptimizedLoaderService() {
+ this(new DefaultLoaderService());
+ }
+
+ public OptimizedLoaderService(LoaderService loaderService) {
+ this.loaderService = loaderService;
+ }
+
+ @Override
+ public <T> List<T> load(Class<T> serviceType) {
+ return load(serviceType,
Thread.currentThread().getContextClassLoader());
+ }
+
+ @Override
+ public <T> List<T> load(Class<T> serviceType, ClassLoader classLoader) {
+ // ServiceLoader is expensive (can take up to a half second). This is
an optimization
+ if (OpenWebBeansPlugin.class.equals(serviceType)) return
loadWebBeansPlugins(classLoader);
+
+ // As far as we know, this only is reached for CDI Extension discovery
+ return loaderService.load(serviceType, classLoader);
+ }
+
+ private <T> List<T> loadWebBeansPlugins(ClassLoader loader) {
+ String[] knownPlugins = {
+ "org.apache.openejb.cdi.CdiPlugin",
+ "org.apache.geronimo.openejb.cdi.GeronimoWebBeansPlugin",
+ "org.apache.webbeans.jsf.plugin.OpenWebBeansJsfPlugin",
+ };
+
+ List<T> list = new ArrayList<T>();
+ for (String name : knownPlugins) {
+ Class<T> clazz;
+ try {
+ clazz = (Class<T>) loader.loadClass(name);
+ } catch (ClassNotFoundException e) {
+ // ignore
+ continue;
+ }
+
+ try {
+ list.add(clazz.newInstance());
+ } catch (Exception e) {
+ log.error("Unable to load OpenWebBeansPlugin: " + name);
+ }
+ }
+ return list;
+ }
+}
