| /** |
| * 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.hadoop.hdfs.qjournal.server; |
| |
| import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_ADMIN; |
| import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_JOURNALNODE_KEYTAB_FILE_KEY; |
| import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_JOURNALNODE_INTERNAL_SPNEGO_USER_NAME_KEY; |
| |
| import java.io.IOException; |
| import java.net.InetSocketAddress; |
| |
| import javax.servlet.ServletContext; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.hadoop.classification.InterfaceAudience; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.hdfs.DFSConfigKeys; |
| import org.apache.hadoop.hdfs.server.common.JspHelper; |
| import org.apache.hadoop.http.HttpServer; |
| import org.apache.hadoop.net.NetUtils; |
| import org.apache.hadoop.security.authorize.AccessControlList; |
| import org.apache.hadoop.security.UserGroupInformation; |
| import org.apache.hadoop.security.SecurityUtil; |
| |
| /** |
| * Encapsulates the HTTP server started by the Journal Service. |
| */ |
| @InterfaceAudience.Private |
| public class JournalNodeHttpServer { |
| public static final Log LOG = LogFactory.getLog( |
| JournalNodeHttpServer.class); |
| |
| public static final String JN_ATTRIBUTE_KEY = "localjournal"; |
| |
| private HttpServer httpServer; |
| private int infoPort; |
| private JournalNode localJournalNode; |
| |
| private final Configuration conf; |
| |
| JournalNodeHttpServer(Configuration conf, JournalNode jn) { |
| this.conf = conf; |
| this.localJournalNode = jn; |
| } |
| |
| void start() throws IOException { |
| final InetSocketAddress bindAddr = getAddress(conf); |
| |
| // initialize the webserver for uploading/downloading files. |
| LOG.info("Starting web server as: "+ SecurityUtil.getServerPrincipal(conf |
| .get(DFS_JOURNALNODE_INTERNAL_SPNEGO_USER_NAME_KEY), |
| bindAddr.getHostName())); |
| |
| int tmpInfoPort = bindAddr.getPort(); |
| httpServer = new HttpServer("journal", bindAddr.getHostName(), |
| tmpInfoPort, tmpInfoPort == 0, conf, new AccessControlList(conf |
| .get(DFS_ADMIN, " "))) { |
| { |
| if (UserGroupInformation.isSecurityEnabled()) { |
| initSpnego(conf, DFS_JOURNALNODE_INTERNAL_SPNEGO_USER_NAME_KEY, |
| DFS_JOURNALNODE_KEYTAB_FILE_KEY); |
| } |
| } |
| }; |
| httpServer.setAttribute(JN_ATTRIBUTE_KEY, localJournalNode); |
| httpServer.setAttribute(JspHelper.CURRENT_CONF, conf); |
| httpServer.addInternalServlet("getJournal", "/getJournal", |
| GetJournalEditServlet.class, true); |
| httpServer.start(); |
| |
| // The web-server port can be ephemeral... ensure we have the correct info |
| infoPort = httpServer.getPort(); |
| |
| LOG.info("Journal Web-server up at: " + bindAddr + ":" + infoPort); |
| } |
| |
| void stop() throws IOException { |
| if (httpServer != null) { |
| try { |
| httpServer.stop(); |
| } catch (Exception e) { |
| throw new IOException(e); |
| } |
| } |
| } |
| |
| /** |
| * Return the actual address bound to by the running server. |
| */ |
| public InetSocketAddress getAddress() { |
| InetSocketAddress addr = httpServer.getListenerAddress(); |
| assert addr.getPort() != 0; |
| return addr; |
| } |
| |
| private static InetSocketAddress getAddress(Configuration conf) { |
| String addr = conf.get(DFSConfigKeys.DFS_JOURNALNODE_HTTP_ADDRESS_KEY, |
| DFSConfigKeys.DFS_JOURNALNODE_HTTP_ADDRESS_DEFAULT); |
| return NetUtils.createSocketAddr(addr, |
| DFSConfigKeys.DFS_JOURNALNODE_HTTP_PORT_DEFAULT, |
| DFSConfigKeys.DFS_JOURNALNODE_HTTP_ADDRESS_KEY); |
| } |
| |
| public static Journal getJournalFromContext(ServletContext context, String jid) |
| throws IOException { |
| JournalNode jn = (JournalNode)context.getAttribute(JN_ATTRIBUTE_KEY); |
| return jn.getOrCreateJournal(jid); |
| } |
| |
| public static Configuration getConfFromContext(ServletContext context) { |
| return (Configuration) context.getAttribute(JspHelper.CURRENT_CONF); |
| } |
| } |