org.apache.pulsar.websocket.service.ProxyServer Maven / Gradle / Ivy
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* 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.pulsar.websocket.service;
import java.net.MalformedURLException;
import java.security.GeneralSecurityException;
import java.util.ArrayList;
import java.util.List;
import java.util.TimeZone;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import javax.net.ssl.SSLContext;
import javax.servlet.Servlet;
import javax.servlet.ServletException;
import javax.websocket.DeploymentException;
import org.apache.pulsar.broker.PulsarServerException;
import org.apache.pulsar.client.api.PulsarClientException;
import org.apache.pulsar.common.util.ObjectMapperFactory;
import org.apache.pulsar.common.util.SecurityUtility;
import org.apache.pulsar.websocket.WebSocketService;
import org.eclipse.jetty.server.Handler;
import org.eclipse.jetty.server.Server;
import org.eclipse.jetty.server.ServerConnector;
import org.eclipse.jetty.server.Slf4jRequestLog;
import org.eclipse.jetty.server.handler.ContextHandlerCollection;
import org.eclipse.jetty.server.handler.DefaultHandler;
import org.eclipse.jetty.server.handler.HandlerCollection;
import org.eclipse.jetty.server.handler.RequestLogHandler;
import org.eclipse.jetty.servlet.ServletContextHandler;
import org.eclipse.jetty.servlet.ServletHolder;
import org.eclipse.jetty.util.ssl.SslContextFactory;
import org.eclipse.jetty.util.thread.ExecutorThreadPool;
import org.glassfish.jersey.server.ResourceConfig;
import org.glassfish.jersey.servlet.ServletContainer;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.fasterxml.jackson.jaxrs.json.JacksonJaxbJsonProvider;
import com.google.common.collect.Lists;
import io.netty.util.concurrent.DefaultThreadFactory;
public class ProxyServer {
private final Server server;
private final List handlers = Lists.newArrayList();
private final WebSocketProxyConfiguration conf;
private final ExecutorService executorService;
public ProxyServer(WebSocketProxyConfiguration config)
throws PulsarClientException, MalformedURLException, PulsarServerException {
this.conf = config;
executorService = Executors.newFixedThreadPool(WebSocketProxyConfiguration.PROXY_SERVER_EXECUTOR_THREADS,
new DefaultThreadFactory("pulsar-websocket-web"));
this.server = new Server(new ExecutorThreadPool(executorService));
List connectors = new ArrayList<>();
ServerConnector connector = new ServerConnector(server);
connector.setPort(config.getWebServicePort());
connectors.add(connector);
// TLS enabled connector
if (config.isTlsEnabled()) {
try {
SslContextFactory sslCtxFactory = SecurityUtility.createSslContextFactory(
config.isTlsAllowInsecureConnection(),
config.getTlsTrustCertsFilePath(),
config.getTlsCertificateFilePath(),
config.getTlsKeyFilePath(),
config.getTlsRequireTrustedClientCertOnConnect());
ServerConnector tlsConnector = new ServerConnector(server, -1, -1, sslCtxFactory);
tlsConnector.setPort(config.getWebServicePortTls());
connectors.add(tlsConnector);
} catch (GeneralSecurityException e) {
throw new PulsarServerException(e);
}
}
// Limit number of concurrent HTTP connections to avoid getting out of
// file descriptors
connectors.stream().forEach(c -> c.setAcceptQueueSize(1024 / connectors.size()));
server.setConnectors(connectors.toArray(new ServerConnector[connectors.size()]));
}
public void addWebSocketServlet(String basePath, Servlet socketServlet)
throws ServletException, DeploymentException {
ServletHolder servletHolder = new ServletHolder("ws-events", socketServlet);
ServletContextHandler context = new ServletContextHandler(ServletContextHandler.SESSIONS);
context.setContextPath(basePath);
context.addServlet(servletHolder, "/*");
handlers.add(context);
}
public void addRestResources(String basePath, String javaPackages, String attribute, Object attributeValue) {
JacksonJaxbJsonProvider provider = new JacksonJaxbJsonProvider();
provider.setMapper(ObjectMapperFactory.create());
ResourceConfig config = new ResourceConfig();
config.packages("jersey.config.server.provider.packages", javaPackages);
config.register(provider);
ServletHolder servletHolder = new ServletHolder(new ServletContainer(config));
servletHolder.setAsyncSupported(true);
ServletContextHandler context = new ServletContextHandler(ServletContextHandler.SESSIONS);
context.setContextPath(basePath);
context.addServlet(servletHolder, "/*");
context.setAttribute(attribute, attributeValue);
handlers.add(context);
}
public void start() throws PulsarServerException {
log.info("Starting web socket proxy at port {}", conf.getWebServicePort());
try {
RequestLogHandler requestLogHandler = new RequestLogHandler();
Slf4jRequestLog requestLog = new Slf4jRequestLog();
requestLog.setExtended(true);
requestLog.setLogTimeZone(TimeZone.getDefault().getID());
requestLog.setLogLatency(true);
requestLogHandler.setRequestLog(requestLog);
handlers.add(0, new ContextHandlerCollection());
handlers.add(requestLogHandler);
ContextHandlerCollection contexts = new ContextHandlerCollection();
contexts.setHandlers(handlers.toArray(new Handler[handlers.size()]));
HandlerCollection handlerCollection = new HandlerCollection();
handlerCollection.setHandlers(new Handler[] { contexts, new DefaultHandler(), requestLogHandler });
server.setHandler(handlerCollection);
server.start();
} catch (Exception e) {
throw new PulsarServerException(e);
}
}
public void stop() throws Exception {
server.stop();
executorService.shutdown();
}
private static final Logger log = LoggerFactory.getLogger(ProxyServer.class);
}