Author: almaw
Date: Wed Nov 7 11:59:22 2007
New Revision: 592871
URL: http://svn.apache.org/viewvc?rev=592871&view=rev
Log:
Counterpart to SpringWebApplicationFactory.
Added:
wicket/trunk/jdk-1.5/wicket-guice/src/main/java/org/apache/wicket/guice/GuiceWebApplicationFactory.java
Added:
wicket/trunk/jdk-1.5/wicket-guice/src/main/java/org/apache/wicket/guice/GuiceWebApplicationFactory.java
URL:
http://svn.apache.org/viewvc/wicket/trunk/jdk-1.5/wicket-guice/src/main/java/org/apache/wicket/guice/GuiceWebApplicationFactory.java?rev=592871&view=auto
==============================================================================
---
wicket/trunk/jdk-1.5/wicket-guice/src/main/java/org/apache/wicket/guice/GuiceWebApplicationFactory.java
(added)
+++
wicket/trunk/jdk-1.5/wicket-guice/src/main/java/org/apache/wicket/guice/GuiceWebApplicationFactory.java
Wed Nov 7 11:59:22 2007
@@ -0,0 +1,137 @@
+/*
+ * 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.wicket.guice;
+
+import javax.servlet.ServletContext;
+
+import org.apache.wicket.protocol.http.IWebApplicationFactory;
+import org.apache.wicket.protocol.http.WebApplication;
+import org.apache.wicket.protocol.http.WicketFilter;
+
+import com.google.inject.Guice;
+import com.google.inject.Injector;
+import com.google.inject.Module;
+
+
+/**
+ * Implementation of IWebApplicationFactory that pulls the WebApplication
object out of a Guice
+ * Module.
+ *
+ * Configuration example:
+ *
+ * <pre>
+ * <servlet>
+ * <servlet-name>myApp</servlet-name>
+ *
<servlet-class>org.apache.wicket.protocol.http.WicketServlet</servlet-class>
+ * <init-param>
+ * <param-name>applicationFactoryClassName</param-name>
+ *
<param-value>org.apache.wicket.guice.GuiceWebApplicationFactory</param-value>
+ * </init-param>
+ * <init-param>
+ * <param-name>module</param-name>
+ * <param-value>com.company.MyGuiceModule</param-value>
+ * </init-param>
+ * <load-on-startup>1</load-on-startup>
+ * </servlet>
+ * </pre>
+ *
+ * This factory will create an Injector configured using the Guice Module
implementation you pass it
+ * above. The Guice Module (MyGuiceModule in the example above) needs to bind
WebApplication.class
+ * and provide a concrete implementation of it.
+ *
+ * Alternatively, you can dig the Injector out of the ServletContext as an
attribute, like so:
+ *
+ * <pre>
+ * <servlet>
+ * <servlet-name>myApp</servlet-name>
+ *
<servlet-class>org.apache.wicket.protocol.http.WicketServlet</servlet-class>
+ * <init-param>
+ * <param-name>applicationFactoryClassName</param-name>
+ *
<param-value>org.apache.wicket.guice.GuiceWebApplicationFactory</param-value>
+ * </init-param>
+ * <init-param>
+ * <param-name>injectorContextAttribute</param-name>
+ * <param-value>GuiceInjector</param-value>
+ * </init-param>
+ * <load-on-startup>1</load-on-startup>
+ * </servlet>
+ * </pre>
+ *
+ * @author Alastair Maw (almaw)
+ *
+ */
+public class GuiceWebApplicationFactory implements IWebApplicationFactory
+{
+ /**
+ * @see IWebApplicationFactory#createApplication(WicketFilter)
+ */
+ public WebApplication createApplication(WicketFilter filter)
+ {
+ Injector injector;
+
+ String injectorContextAttribute =
filter.getFilterConfig().getInitParameter(
+ "injectorContextAttribute");
+ if (injectorContextAttribute != null)
+ {
+ ServletContext sc =
filter.getFilterConfig().getServletContext();
+
+ // Try to dig the Injector out of the ServletContext,
for integration with context
+ // listener-based instantiation of Guice.
+ injector =
(Injector)sc.getAttribute(injectorContextAttribute);
+ if (injector == null)
+ {
+ throw new RuntimeException(
+ "Could not find Guice Injector
in the ServletContext under attribute: " +
+
injectorContextAttribute);
+ }
+ }
+ else if (filter.getFilterConfig().getInitParameter("module") !=
null)
+ {
+ String moduleName =
filter.getFilterConfig().getInitParameter("module");
+ try
+ {
+ Class< ? > moduleClazz =
Class.forName(moduleName);
+ Object moduleObject = moduleClazz.newInstance();
+ Module module = (Module)moduleObject;
+ injector = Guice.createInjector(module);
+ }
+ catch (InstantiationException e)
+ {
+ throw new RuntimeException("Could not create
new instance of Guice Module class " +
+ moduleName, e);
+ }
+ catch (ClassNotFoundException e)
+ {
+ throw new RuntimeException("Could not create
new instance of Guice Module class " +
+ moduleName, e);
+ }
+ catch (IllegalAccessException e)
+ {
+ throw new RuntimeException("Could not create
new instance of Guice Module class " +
+ moduleName, e);
+ }
+ }
+ else
+ {
+ throw new RuntimeException(
+ "To use GuiceWebApplicationFactory, you
must specify either an 'injectorContextAttribute' or a 'module' init-param.");
+ }
+ WebApplication result =
injector.getInstance(WebApplication.class);
+ result.addComponentInstantiationListener(new
GuiceComponentInjector(result, injector));
+ return result;
+ }
+}
\ No newline at end of file
