List of usage examples for org.apache.hadoop.conf Configuration getInstances
@SuppressWarnings("unchecked") public <U> List<U> getInstances(String name, Class<U> xface)
name property as a List of objects implementing the interface specified by xface. From source file:common.DataNode.java
License:Apache License
/** * This method starts the data node with the specified conf. * // w ww . j a v a 2 s . co m * @param conf - the configuration * if conf's CONFIG_PROPERTY_SIMULATED property is set * then a simulated storage based data node is created. * * @param dataDirs - only for a non-simulated storage data node * @throws IOException */ void startDataNode(Configuration conf, AbstractList<File> dataDirs, DatanodeProtocol namenode) throws IOException { // use configured nameserver & interface to get local hostname if (conf.get(DFSConfigKeys.DFS_DATANODE_HOST_NAME_KEY) != null) { machineName = conf.get(DFSConfigKeys.DFS_DATANODE_HOST_NAME_KEY); } if (machineName == null) { machineName = DNS.getDefaultHost(conf.get("dfs.datanode.dns.interface", "default"), conf.get("dfs.datanode.dns.nameserver", "default")); } this.nameNodeAddr = NameNode.getAddress(conf); this.socketTimeout = conf.getInt(DFSConfigKeys.DFS_CLIENT_SOCKET_TIMEOUT_KEY, HdfsConstants.READ_TIMEOUT); this.socketWriteTimeout = conf.getInt("dfs.datanode.socket.write.timeout", HdfsConstants.WRITE_TIMEOUT); /* Based on results on different platforms, we might need set the default * to false on some of them. */ this.transferToAllowed = conf.getBoolean("dfs.datanode.transferTo.allowed", true); this.writePacketSize = conf.getInt(DFSConfigKeys.DFS_CLIENT_WRITE_PACKET_SIZE_KEY, DFSConfigKeys.DFS_CLIENT_WRITE_PACKET_SIZE_DEFAULT); InetSocketAddress socAddr = NetUtils.createSocketAddr(conf.get("dfs.datanode.address", "0.0.0.0:50010")); int tmpPort = socAddr.getPort(); storage = new DataStorage(); // construct registration this.dnRegistration = new DatanodeRegistration(machineName + ":" + tmpPort); // connect to name node this.namenode = namenode; // get version and id info from the name-node NamespaceInfo nsInfo = handshake(); StartupOption startOpt = getStartupOption(conf); assert startOpt != null : "Startup option must be set."; boolean simulatedFSDataset = conf.getBoolean("dfs.datanode.simulateddatastorage", false); if (simulatedFSDataset) { setNewStorageID(dnRegistration); dnRegistration.storageInfo.layoutVersion = FSConstants.LAYOUT_VERSION; dnRegistration.storageInfo.namespaceID = nsInfo.namespaceID; // it would have been better to pass storage as a parameter to // constructor below - need to augment ReflectionUtils used below. conf.set(DFSConfigKeys.DFS_DATANODE_STORAGEID_KEY, dnRegistration.getStorageID()); try { //Equivalent of following (can't do because Simulated is in test dir) // this.data = new SimulatedFSDataset(conf); this.data = (FSDatasetInterface) ReflectionUtils.newInstance( Class.forName("org.apache.hadoop.hdfs.server.datanode.SimulatedFSDataset"), conf); } catch (ClassNotFoundException e) { throw new IOException(StringUtils.stringifyException(e)); } } else { // real storage // read storage info, lock data dirs and transition fs state if necessary storage.recoverTransitionRead(nsInfo, dataDirs, startOpt); // adjust this.dnRegistration.setStorageInfo(storage); // initialize data node internal structure this.data = new FSDataset(storage, conf); } // find free port ServerSocket ss = (socketWriteTimeout > 0) ? ServerSocketChannel.open().socket() : new ServerSocket(); Server.bind(ss, socAddr, 0); ss.setReceiveBufferSize(DEFAULT_DATA_SOCKET_SIZE); // adjust machine name with the actual port tmpPort = ss.getLocalPort(); selfAddr = new InetSocketAddress(ss.getInetAddress().getHostAddress(), tmpPort); this.dnRegistration.setName(machineName + ":" + tmpPort); LOG.info("Opened info server at " + tmpPort); this.threadGroup = new ThreadGroup("dataXceiverServer"); this.dataXceiverServer = new Daemon(threadGroup, new DataXceiverServer(ss, conf, this)); this.threadGroup.setDaemon(true); // auto destroy when empty this.blockReportInterval = conf.getLong("dfs.blockreport.intervalMsec", BLOCKREPORT_INTERVAL); this.initialBlockReportDelay = conf.getLong("dfs.blockreport.initialDelay", BLOCKREPORT_INITIAL_DELAY) * 1000L; if (this.initialBlockReportDelay >= blockReportInterval) { this.initialBlockReportDelay = 0; LOG.info("dfs.blockreport.initialDelay is greater than " + "dfs.blockreport.intervalMsec." + " Setting initial delay to 0 msec:"); } this.heartBeatInterval = conf.getLong("dfs.heartbeat.interval", HEARTBEAT_INTERVAL) * 1000L; //initialize periodic block scanner String reason = null; if (conf.getInt("dfs.datanode.scan.period.hours", 0) < 0) { reason = "verification is turned off by configuration"; } else if (!(data instanceof FSDataset)) { reason = "verifcation is supported only with FSDataset"; } if (reason == null) { blockScanner = new DataBlockScanner(this, (FSDataset) data, conf); } else { LOG.info("Periodic Block Verification is disabled because " + reason + "."); } //create a servlet to serve full-file content InetSocketAddress infoSocAddr = NetUtils .createSocketAddr(conf.get("dfs.datanode.http.address", "0.0.0.0:50075")); String infoHost = infoSocAddr.getHostName(); int tmpInfoPort = infoSocAddr.getPort(); this.infoServer = new HttpServer("datanode", infoHost, tmpInfoPort, tmpInfoPort == 0, conf); if (conf.getBoolean("dfs.https.enable", false)) { boolean needClientAuth = conf.getBoolean(DFSConfigKeys.DFS_CLIENT_HTTPS_NEED_AUTH_KEY, DFSConfigKeys.DFS_CLIENT_HTTPS_NEED_AUTH_DEFAULT); InetSocketAddress secInfoSocAddr = NetUtils .createSocketAddr(conf.get("dfs.datanode.https.address", infoHost + ":" + 0)); Configuration sslConf = new HdfsConfiguration(false); sslConf.addResource(conf.get("dfs.https.server.keystore.resource", "ssl-server.xml")); this.infoServer.addSslListener(secInfoSocAddr, sslConf, needClientAuth); } this.infoServer.addInternalServlet(null, "/streamFile/*", StreamFile.class); this.infoServer.addInternalServlet(null, "/getFileChecksum/*", FileChecksumServlets.GetServlet.class); this.infoServer.setAttribute("datanode.blockScanner", blockScanner); this.infoServer.setAttribute("datanode.conf", conf); this.infoServer.addServlet(null, "/blockScannerReport", DataBlockScanner.Servlet.class); this.infoServer.start(); // adjust info port this.dnRegistration.setInfoPort(this.infoServer.getPort()); myMetrics = new DataNodeMetrics(conf, dnRegistration.getName()); // set service-level authorization security policy if (conf.getBoolean(ServiceAuthorizationManager.SERVICE_AUTHORIZATION_CONFIG, false)) { ServiceAuthorizationManager.refresh(conf, new HDFSPolicyProvider()); } //init ipc server InetSocketAddress ipcAddr = NetUtils.createSocketAddr(conf.get("dfs.datanode.ipc.address")); ipcServer = RPC.getServer(DataNode.class, this, ipcAddr.getHostName(), ipcAddr.getPort(), conf.getInt("dfs.datanode.handler.count", 3), false, conf); ipcServer.start(); dnRegistration.setIpcPort(ipcServer.getListenerAddress().getPort()); LOG.info("dnRegistration = " + dnRegistration); plugins = conf.getInstances("dfs.datanode.plugins", ServicePlugin.class); for (ServicePlugin p : plugins) { try { p.start(this); LOG.info("Started plug-in " + p); } catch (Throwable t) { LOG.warn("ServicePlugin " + p + " could not be started", t); } } }
From source file:common.NameNode.java
License:Apache License
/** * Activate name-node servers and threads. *///from w ww . ja v a 2 s.com void activate(Configuration conf) throws IOException { if ((isRole(NamenodeRole.ACTIVE)) && (UserGroupInformation.isSecurityEnabled())) { namesystem.activateSecretManager(); } namesystem.activate(conf); startHttpServer(conf); server.start(); //start RPC server startTrashEmptier(conf); plugins = conf.getInstances("dfs.namenode.plugins", ServicePlugin.class); for (ServicePlugin p : plugins) { try { p.start(this); } catch (Throwable t) { LOG.warn("ServicePlugin " + p + " could not be started", t); } } }
From source file:org.elasticsearch.hadoop.mr.MultiOutputFormat.java
License:Apache License
private List<OutputFormat> getNewApiFormats(Configuration cfg) { if (newApiFormat == null) { newApiFormat = cfg.getInstances(CFG_FIELD, OutputFormat.class); }/*from www.j a va 2 s . co m*/ return newApiFormat; }
From source file:org.elasticsearch.hadoop.mr.MultiOutputFormat.java
License:Apache License
private List<org.apache.hadoop.mapred.OutputFormat> getOldApiFormats(Configuration cfg) { if (oldApiFormat == null) { oldApiFormat = cfg.getInstances(CFG_FIELD, org.apache.hadoop.mapred.OutputFormat.class); }/*from www .j av a2s . c o m*/ return oldApiFormat; }