DefaultResourceServer.java
/*
* *********************************************************************************************************************
*
* blueMarine II: Semantic Media Centre
* http://tidalwave.it/projects/bluemarine2
*
* Copyright (C) 2015 - 2021 by Tidalwave s.a.s. (http://tidalwave.it)
*
* *********************************************************************************************************************
*
* 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.
*
* *********************************************************************************************************************
*
* git clone https://bitbucket.org/tidalwave/bluemarine2-src
* git clone https://github.com/tidalwave-it/bluemarine2-src
*
* *********************************************************************************************************************
*/
package it.tidalwave.bluemarine2.rest.impl.server;
import javax.annotation.Nonnull;
import javax.inject.Inject;
import java.util.stream.Stream;
import java.util.Enumeration;
import java.util.EnumSet;
import java.io.IOException;
import java.net.InetAddress;
import java.net.Inet4Address;
import java.net.InetSocketAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import javax.servlet.DispatcherType;
import it.tidalwave.util.annotation.VisibleForTesting;
import org.eclipse.jetty.util.resource.Resource;
import org.eclipse.jetty.util.resource.ResourceCollection;
import org.eclipse.jetty.server.Server;
import org.eclipse.jetty.server.ServerConnector;
import org.eclipse.jetty.servlet.FilterHolder;
import org.eclipse.jetty.servlet.ServletContextHandler;
import org.eclipse.jetty.servlet.ServletHolder;
import org.eclipse.jetty.servlet.DefaultServlet;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
import org.springframework.core.io.support.ResourcePatternResolver;
import org.springframework.context.ApplicationContext;
import org.springframework.web.servlet.DispatcherServlet;
import it.tidalwave.messagebus.annotation.ListensTo;
import it.tidalwave.messagebus.annotation.SimpleMessageSubscriber;
import it.tidalwave.bluemarine2.message.PowerOnNotification;
import it.tidalwave.bluemarine2.message.PowerOffNotification;
import it.tidalwave.bluemarine2.rest.spi.ResourceServer;
import lombok.extern.slf4j.Slf4j;
import static it.tidalwave.util.FunctionalCheckedExceptionWrappers.*;
/***********************************************************************************************************************
*
* @author Fabrizio Giudici
*
**********************************************************************************************************************/
@SimpleMessageSubscriber @Slf4j
public class DefaultResourceServer implements ResourceServer
{
private String ipAddress = "";
private int port;
private Server server;
@Inject
private ApplicationContext applicationContext;
/*******************************************************************************************************************
*
* {@inheritDoc}
*
******************************************************************************************************************/
@Override @Nonnull
public String absoluteUrl (@Nonnull final String type)
{
return String.format("http://%s:%d/%s", ipAddress, port, type);
}
/*******************************************************************************************************************
*
*
******************************************************************************************************************/
@VisibleForTesting
public void onPowerOnNotification (@ListensTo @Nonnull final PowerOnNotification notification)
throws Exception
{
log.info("onPowerOnNotification({})", notification);
ipAddress = getNonLoopbackIPv4Address().getHostAddress();
server = new Server(InetSocketAddress.createUnresolved(ipAddress, Integer.getInteger("port", 0)));
final ServletContextHandler servletContext = new ServletContextHandler();
servletContext.setBaseResource(new ResourceCollection(findWebResources()));
log.info("RESOURCE BASE: {}", servletContext.getResourceBase());
servletContext.setContextPath("/");
servletContext.setWelcomeFiles(new String[] { "index.xhtml" });
final DelegateWebApplicationContext wac = new DelegateWebApplicationContext(applicationContext, servletContext.getServletContext());
servletContext.addServlet(new ServletHolder("spring", new DispatcherServlet(wac)), "/rest/*");
servletContext.addServlet(new ServletHolder("default", new DefaultServlet()), "/*");
servletContext.addFilter(new FilterHolder(new LoggingFilter()), "/*", EnumSet.allOf(DispatcherType.class));
server.setHandler(servletContext);
server.start();
port = ((ServerConnector)server.getConnectors()[0]).getLocalPort();
log.info(">>>> resource server jetty started at {}:{} ", ipAddress, port);
}
/*******************************************************************************************************************
*
*
******************************************************************************************************************/
@VisibleForTesting public void onPowerOffNotification (@ListensTo @Nonnull final PowerOffNotification notification)
throws Exception
{
log.info("onPowerOffNotification({})", notification);
server.stop();
server.destroy();
}
/*******************************************************************************************************************
*
*
*
******************************************************************************************************************/
@Nonnull
private InetAddress getNonLoopbackIPv4Address()
throws SocketException
{
for (final Enumeration<NetworkInterface> en = NetworkInterface.getNetworkInterfaces(); en.hasMoreElements() ; )
{
final NetworkInterface itf = en.nextElement();
if (!itf.getName().startsWith("docker"))
{
for (final Enumeration<InetAddress> ee = itf.getInetAddresses(); ee.hasMoreElements() ;)
{
final InetAddress address = ee.nextElement();
if (!address.isLoopbackAddress() && (address instanceof Inet4Address))
{
return address;
}
}
}
}
log.warn("Returning loopback address!");
return InetAddress.getLoopbackAddress();
}
/*******************************************************************************************************************
*
*
******************************************************************************************************************/
@Nonnull
private Resource[] findWebResources()
throws IOException
{
final ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
final ResourcePatternResolver resolver = new PathMatchingResourcePatternResolver(classLoader);
return Stream.of(resolver.getResources("classpath*:/webapp"))
.map(_f(x -> Resource.newResource(x.getURI())))
.toArray(Resource[]::new);
}
}