/*
* #%L
* Gravia :: Container :: Tomcat :: Webapp
* %%
* Copyright (C) 2010 - 2014 JBoss by Red Hat
* %%
* Licensed 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.
* #L%
*/
package org.jboss.gravia.container.common;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletContext;
import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.jboss.gravia.runtime.Module;
import org.jboss.gravia.runtime.ModuleContext;
import org.jboss.gravia.runtime.ServiceReference;
import org.jboss.gravia.runtime.ServiceTracker;
import org.jboss.gravia.runtime.spi.RuntimeLogger;
import org.osgi.framework.BundleContext;
import org.osgi.service.http.HttpService;
/**
* Register the system HttpService.
*
* @author thomas.diesler@jboss.com
* @since 16-Jun-2014
*/
public class HttpServiceActivator implements ServletContextListener {
private ServiceTracker<HttpService, HttpService> tracker;
private static final String SYSTEM_ALIAS = "/system";
@Override
public void contextInitialized(ServletContextEvent event) {
ServletContext servletContext = event.getServletContext();
BundleContext bundleContext = (BundleContext) servletContext.getAttribute(BundleContext.class.getName());
final Module module = bundleContext.getBundle().adapt(Module.class);
final ModuleContext context = module.getModuleContext();
tracker = new ServiceTracker<HttpService, HttpService>(context, HttpService.class, null) {
@Override
public HttpService addingService(ServiceReference<HttpService> sref) {
HttpService service = super.addingService(sref);
try {
RuntimeLogger.LOGGER.info("Register system HttpService with alias: " + SYSTEM_ALIAS);
service.registerServlet(SYSTEM_ALIAS, new HttpServiceServlet(module), null, null);
} catch (Exception ex) {
throw new IllegalStateException(ex);
}
return service;
}
@Override
public void removedService(ServiceReference<HttpService> reference, HttpService service) {
RuntimeLogger.LOGGER.info("Unregister system HttpService with alias: " + SYSTEM_ALIAS);
service.unregister(SYSTEM_ALIAS);
super.removedService(reference, service);
}
};
tracker.open();
}
@Override
public void contextDestroyed(ServletContextEvent event) {
if (tracker != null) {
tracker.close();
}
}
@SuppressWarnings("serial")
static final class HttpServiceServlet extends HttpServlet {
private final Module module;
// This hides the default ctor and verifies that this instance is used
HttpServiceServlet(Module module) {
this.module = module;
}
protected void doGet(HttpServletRequest req, HttpServletResponse res) throws IOException {
PrintWriter out = res.getWriter();
out.print(module.getIdentity().getSymbolicName());
out.close();
}
}
}