alluxio.web.WorkerWebServer Maven / Gradle / Ivy
/*
* The Alluxio Open Foundation licenses this work under the Apache License, version 2.0
* (the "License"). You may not use this work except in compliance with the License, which is
* available at www.apache.org/licenses/LICENSE-2.0
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
* either express or implied, as more fully set forth in the License.
*
* See the NOTICE file distributed with this work for information regarding copyright ownership.
*/
package alluxio.web;
import alluxio.Constants;
import alluxio.client.file.FileSystem;
import alluxio.conf.Configuration;
import alluxio.conf.PropertyKey;
import alluxio.util.io.PathUtils;
import alluxio.worker.DataWorker;
import alluxio.worker.WorkerProcess;
import com.google.common.base.Preconditions;
import org.eclipse.jetty.servlet.DefaultServlet;
import org.eclipse.jetty.servlet.ErrorPageErrorHandler;
import org.eclipse.jetty.servlet.ServletHolder;
import org.eclipse.jetty.util.resource.Resource;
import org.glassfish.jersey.server.ResourceConfig;
import org.glassfish.jersey.servlet.ServletContainer;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.File;
import java.io.IOException;
import java.net.InetSocketAddress;
import javax.annotation.concurrent.NotThreadSafe;
import javax.servlet.ServletException;
/**
* The Alluxio worker web server.
*/
@NotThreadSafe
public final class WorkerWebServer extends WebServer {
private static final Logger LOG = LoggerFactory.getLogger(WorkerWebServer.class);
public static final String ALLUXIO_WORKER_SERVLET_RESOURCE_KEY = "Alluxio Worker";
public static final String ALLUXIO_FILESYSTEM_CLIENT_RESOURCE_KEY =
"Alluxio Worker FileSystem Client";
private final FileSystem mFileSystem;
/**
* Creates a new instance of {@link WorkerWebServer}.
*
* @param webAddress the service address
* @param workerProcess the Alluxio worker process
* @param worker block worker to manage blocks
*/
public WorkerWebServer(InetSocketAddress webAddress, final WorkerProcess workerProcess,
DataWorker worker) {
this(webAddress, workerProcess, worker, FileSystem.Factory.create());
}
/**
* Creates a new instance of {@link WorkerWebServer}.
*
* @param webAddress the service address
* @param workerProcess the Alluxio worker process
* @param worker block worker to manage blocks
* @param fileSystem the filesystem
*/
public WorkerWebServer(InetSocketAddress webAddress, final WorkerProcess workerProcess,
DataWorker worker, FileSystem fileSystem) {
super("Alluxio worker web service", webAddress);
Preconditions.checkNotNull(worker, "Block worker cannot be null");
// REST configuration
ResourceConfig config = new ResourceConfig().packages("alluxio.worker", "alluxio.worker.block")
.register(JacksonProtobufObjectMapperProvider.class);
mFileSystem = fileSystem;
// Override the init method to inject a reference to AlluxioWorker into the servlet context.
// ServletContext may not be modified until after super.init() is called.
ServletContainer servlet = new ServletContainer(config) {
private static final long serialVersionUID = -7586014404855912954L;
@Override
public void init() throws ServletException {
super.init();
getServletContext().setAttribute(ALLUXIO_WORKER_SERVLET_RESOURCE_KEY, workerProcess);
getServletContext().setAttribute(ALLUXIO_FILESYSTEM_CLIENT_RESOURCE_KEY, mFileSystem);
}
};
ServletHolder servletHolder = new ServletHolder("Alluxio Worker Web Service", servlet);
mServletContextHandler
.addServlet(servletHolder, PathUtils.concatPath(Constants.REST_API_PREFIX, "*"));
// STATIC assets
try {
// If the Web UI is disabled, disable the resources and servlet together.
if (Configuration.getBoolean(PropertyKey.WEB_UI_ENABLED)) {
String resourceDirPathString =
Configuration.getString(PropertyKey.WEB_RESOURCES) + "/worker/build/";
File resourceDir = new File(resourceDirPathString);
mServletContextHandler.setBaseResource(Resource.newResource(resourceDir.getAbsolutePath()));
mServletContextHandler.setWelcomeFiles(new String[]{"index.html"});
mServletContextHandler.setResourceBase(resourceDir.getAbsolutePath());
mServletContextHandler.addServlet(DefaultServlet.class, "/");
ErrorPageErrorHandler errorHandler = new ErrorPageErrorHandler();
// TODO(william): consider a rewrite rule instead of an error handler
errorHandler.addErrorPage(404, "/");
mServletContextHandler.setErrorHandler(errorHandler);
}
} catch (IOException e) {
LOG.error("ERROR: resource path is malformed", e);
}
}
@Override
public void stop() throws Exception {
mFileSystem.close();
super.stop();
}
}