| /* |
| * 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.uima.collection.impl.cpm.container.deployer.vns; |
| |
| import java.io.IOException; |
| import java.net.BindException; |
| import java.net.PortUnreachableException; |
| import java.net.ServerSocket; |
| |
| import org.apache.uima.UIMAFramework; |
| import org.apache.uima.collection.impl.cpm.engine.BoundedWorkQueue; |
| import org.apache.uima.collection.impl.cpm.utils.CPMUtils; |
| import org.apache.uima.util.Level; |
| import org.apache.vinci.transport.BaseClient; |
| import org.apache.vinci.transport.ServiceException; |
| import org.apache.vinci.transport.Transportable; |
| import org.apache.vinci.transport.VinciFrame; |
| import org.apache.vinci.transport.VinciServableAdapter; |
| import org.apache.vinci.transport.VinciServer; |
| |
| /** |
| * |
| * LOCAL Vinci Naming Service. Used by locally deployed TAEs. Locally, meaning TAEs running on the |
| * same machine but in different JVM. This VNS is primarily used by TAEs to advertise their |
| * availability after succesfull startup. |
| * |
| */ |
| |
| public class LocalVNS extends VinciServableAdapter implements Runnable { |
| private int onport; |
| |
| private int startport = 11111; |
| |
| private int maxport = 12331; |
| |
| private int vnsPort = 9001; |
| |
| private VinciServer server = null; |
| |
| private BoundedWorkQueue portQueue = null; |
| |
| public LocalVNS() { |
| } |
| |
| /** |
| * Instantiates Local Vinci Naming Service |
| * |
| * @param aStartPort - |
| * a starting port # for clients (services) |
| * @param aEndPort - |
| * an ending port # for clients( services) |
| * @param aVNSPort - |
| * port on which this VNS will listen on |
| * @throws PortUnreachableException - |
| */ |
| public LocalVNS(String aStartPort, String aEndPort, String aVNSPort) |
| throws PortUnreachableException { |
| if (aStartPort != null) { |
| try { |
| startport = Integer.parseInt(aStartPort); |
| } catch (NumberFormatException e) { |
| } |
| } |
| if (aEndPort != null) { |
| try { |
| maxport = Integer.parseInt(aEndPort); |
| } catch (NumberFormatException e) { |
| } |
| } |
| |
| if (aVNSPort != null) { |
| try { |
| vnsPort = Integer.parseInt(aVNSPort); |
| boolean vnsPortAvailable = false; |
| int currentRetryCount = 0; |
| while (!vnsPortAvailable) { |
| if (UIMAFramework.getLogger().isLoggable(Level.INFO)) { |
| UIMAFramework.getLogger(this.getClass()).logrb(Level.INFO, this.getClass().getName(), |
| "initialize", CPMUtils.CPM_LOG_RESOURCE_BUNDLE, "UIMA_CPM_test_vns_port__INFO", |
| new Object[] { Thread.currentThread().getName(), String.valueOf(vnsPort) }); |
| } |
| vnsPortAvailable = isAvailable(vnsPort); |
| |
| if (currentRetryCount > 100) { |
| throw new PortUnreachableException("Unable to aquire a port for VNS Service"); |
| } |
| if (!vnsPortAvailable) { |
| vnsPort++; |
| } |
| currentRetryCount++; |
| } |
| } catch (NumberFormatException e) { |
| e.printStackTrace(); |
| } |
| } |
| if (UIMAFramework.getLogger().isLoggable(Level.INFO)) { |
| UIMAFramework.getLogger(this.getClass()).logrb(Level.INFO, this.getClass().getName(), |
| "initialize", CPMUtils.CPM_LOG_RESOURCE_BUNDLE, "UIMA_CPM_activating_vns_port__INFO", |
| new Object[] { Thread.currentThread().getName(), String.valueOf(vnsPort) }); |
| } |
| onport = startport; |
| } |
| |
| /** |
| * Initialize local VNS instance with a range of ports, and the port for the VNS itself. A given |
| * port is tested first for availability. If it is not available the next port is tested, until |
| * one is found to be available. |
| * |
| * @param aStartPort - |
| * starting port number used |
| * @param aEndPort - |
| * end port number. Together with StartPort defines the range of ports (port pool) |
| * @param aVNSPort - |
| * port on which this VNS will listen for requests |
| * |
| * @throws PortUnreachableException unreachable port after retries |
| */ |
| public LocalVNS(int aStartPort, int aEndPort, int aVNSPort) throws PortUnreachableException { |
| startport = aStartPort; |
| maxport = aEndPort; |
| vnsPort = aVNSPort; |
| boolean vnsPortAvailable = false; |
| int currentRetryCount = 0; |
| // Loop until we find a valid port or hard limit of 100 tries is reached |
| while (!vnsPortAvailable) { |
| if (UIMAFramework.getLogger().isLoggable(Level.INFO)) { |
| UIMAFramework.getLogger(this.getClass()).logrb(Level.INFO, this.getClass().getName(), |
| "initialize", CPMUtils.CPM_LOG_RESOURCE_BUNDLE, "UIMA_CPM_test_vns_port__INFO", |
| new Object[] { Thread.currentThread().getName(), String.valueOf(vnsPort) }); |
| } |
| vnsPortAvailable = isAvailable(vnsPort); |
| |
| if (currentRetryCount > 100) { |
| UIMAFramework.getLogger(this.getClass()).logrb(Level.SEVERE, this.getClass().getName(), |
| "initialize", CPMUtils.CPM_LOG_RESOURCE_BUNDLE, |
| "UIMA_CPM_vns_port_not_available__SEVERE", |
| new Object[] { Thread.currentThread().getName(), String.valueOf(vnsPort) }); |
| |
| throw new PortUnreachableException("Unable to aquire a port for VNS Service"); |
| } |
| if (!vnsPortAvailable) { |
| vnsPort++; |
| } |
| currentRetryCount++; |
| } |
| if (UIMAFramework.getLogger().isLoggable(Level.INFO)) { |
| UIMAFramework.getLogger(this.getClass()).logrb(Level.INFO, this.getClass().getName(), |
| "initialize", CPMUtils.CPM_LOG_RESOURCE_BUNDLE, "UIMA_CPM_activating_vns_port__INFO", |
| new Object[] { Thread.currentThread().getName(), String.valueOf(vnsPort) }); |
| } |
| onport = startport; |
| } |
| |
| /** |
| * Associates a port pool with instance of VNS. |
| * |
| * @param pQueue - |
| * queue where allocated ports will be added |
| */ |
| public synchronized void setConnectionPool(BoundedWorkQueue pQueue) { |
| portQueue = pQueue; |
| } |
| |
| /** |
| * Determines if a given port is free. It establishes a short lived connection to the port and if |
| * successful returns false. |
| * |
| * @param port number to check |
| * @return - |
| */ |
| public boolean isAvailable(int port) { |
| ServerSocket socket = null; |
| try { |
| // Open the socket |
| socket = new ServerSocket(port); |
| return true; |
| } catch (Exception e) { |
| // Disregard this error. False is returned in this case and the caller determines what to do |
| } finally { |
| if (socket != null) { |
| try { |
| if (UIMAFramework.getLogger().isLoggable(Level.INFO)) { |
| UIMAFramework.getLogger(this.getClass()).logrb(Level.INFO, this.getClass().getName(), |
| "initialize", CPMUtils.CPM_LOG_RESOURCE_BUNDLE, |
| "UIMA_CPM_test_local_port__INFO", |
| new Object[] { Thread.currentThread().getName(), String.valueOf(port) }); |
| } |
| socket.close(); |
| } catch (IOException ioe) { |
| } |
| } |
| } |
| return false; |
| } |
| |
| /** |
| * Returns the port number on which local VNS is listening for requests. |
| * |
| * @return - VNS port number |
| */ |
| public int getVNSPort() { |
| return vnsPort; |
| } |
| |
| /** |
| * Returns the next available port. The port is allocated from a cache of ports given to the VNS |
| * service on startup. |
| * |
| * @return - free port |
| * |
| * @throws PortUnreachableException can't get port in configured range |
| */ |
| public synchronized int getPort() throws PortUnreachableException { |
| boolean portAvailable = false; |
| int retryCount = 0; |
| while (!portAvailable) { |
| onport++; |
| if (onport > maxport) { |
| onport = startport; |
| retryCount++; // increment total number of times we cycled through available ports |
| } |
| if (UIMAFramework.getLogger().isLoggable(Level.INFO)) { |
| UIMAFramework.getLogger(this.getClass()).logrb(Level.INFO, this.getClass().getName(), |
| "initialize", CPMUtils.CPM_LOG_RESOURCE_BUNDLE, "UIMA_CPM_test_local_port__INFO", |
| new Object[] { Thread.currentThread().getName(), String.valueOf(onport) }); |
| } |
| // Check port availability |
| portAvailable = isAvailable(onport); |
| // In case ports are not available break out of the loop having tried 4 times |
| // to acquire any of the ports in configured range |
| if (retryCount > 3) { |
| throw new PortUnreachableException( |
| "Unable to aquire any of the ports in configured range:[" + startport + ".." |
| + maxport + "]"); |
| } |
| } |
| return onport; |
| } |
| |
| /** |
| * Main method called by services advertising their availability. Each service, on startup sends |
| * "serveon" request to VNS and waits for assigned port. The VNS looks up its cahce of ports and |
| * returns to the service one that has not yest allocated. |
| * |
| */ |
| public synchronized Transportable eval(Transportable in) throws ServiceException { |
| |
| try { |
| VinciFrame input = (VinciFrame) in; |
| if (UIMAFramework.getLogger().isLoggable(Level.FINEST)) { |
| UIMAFramework.getLogger().log(Level.FINEST, input.toXML()); |
| } |
| |
| String cmd = input.fgetString("vinci:COMMAND"); |
| if (cmd.equals("shutdown")) { |
| if (UIMAFramework.getLogger().isLoggable(Level.INFO)) { |
| UIMAFramework.getLogger(this.getClass()).logrb(Level.INFO, this.getClass().getName(), |
| "initialize", CPMUtils.CPM_LOG_RESOURCE_BUNDLE, |
| "UIMA_CPM_deactivating_vns_port__INFO", |
| new Object[] { Thread.currentThread().getName() }); |
| } |
| this.cleanExit(); |
| return input; |
| } else if (cmd.equals("serveon")) { |
| if (UIMAFramework.getLogger().isLoggable(Level.FINEST)) { |
| UIMAFramework.getLogger(this.getClass()).logrb(Level.FINEST, this.getClass().getName(), |
| "initialize", CPMUtils.CPM_LOG_RESOURCE_BUNDLE, |
| "UIMA_CPM_vns_process_serveon__FINEST", |
| new Object[] { Thread.currentThread().getName() }); |
| } |
| // String serviceName = input.fgetString("SERVICE"); |
| int port = getPort(); |
| input.fdrop("vinci:COMMAND"); |
| input.fadd("IP", "127.0.0.1"); |
| input.fadd("PORT", port); |
| |
| try { |
| if (UIMAFramework.getLogger().isLoggable(Level.FINEST)) { |
| UIMAFramework.getLogger(this.getClass()).logrb(Level.FINEST, this.getClass().getName(), |
| "initialize", CPMUtils.CPM_LOG_RESOURCE_BUNDLE, |
| "UIMA_CPM_assign_service_port__FINEST", |
| new Object[] { Thread.currentThread().getName(), String.valueOf(port) }); |
| } |
| portQueue.enqueue(String.valueOf(port)); |
| if (UIMAFramework.getLogger().isLoggable(Level.FINEST)) { |
| UIMAFramework.getLogger(this.getClass()).logrb(Level.FINEST, this.getClass().getName(), |
| "initialize", CPMUtils.CPM_LOG_RESOURCE_BUNDLE, |
| "UIMA_CPM_assign_service_port_complete__FINEST", |
| new Object[] { Thread.currentThread().getName(), String.valueOf(port) }); |
| } |
| } catch (Exception e) { |
| e.printStackTrace(); |
| } |
| if (UIMAFramework.getLogger().isLoggable(Level.FINEST)) { |
| UIMAFramework.getLogger(this.getClass()).log(Level.FINEST, input.toXML()); |
| UIMAFramework.getLogger().log(Level.FINEST, input.toXML()); |
| } |
| return input; |
| } else if (cmd.equals("resolve")) { |
| String publicVNSHost = System.getProperty("PVNS_HOST"); |
| String publicVNSPort = System.getProperty("PVNS_PORT"); |
| if (publicVNSHost == null || publicVNSHost.trim().length() == 0 || publicVNSPort == null |
| || publicVNSPort.trim().length() == 0) { |
| if (UIMAFramework.getLogger().isLoggable(Level.WARNING)) { |
| UIMAFramework.getLogger(this.getClass()).logrb(Level.WARNING, |
| this.getClass().getName(), "initialize", CPMUtils.CPM_LOG_RESOURCE_BUNDLE, |
| "UIMA_CPM_unknown_vns_command__WARNING", |
| new Object[] { Thread.currentThread().getName() }); |
| } |
| VinciFrame rtn = new VinciFrame(); |
| rtn |
| .fadd("vinci:EXCEPTION", |
| "CPM Reply:Public VNS not known. Verify CPMs startup param include -DVNS_HOST and -DVNS_PORT"); |
| return rtn; |
| } |
| int pvnsPort = -1; |
| try { |
| pvnsPort = Integer.parseInt(publicVNSPort); |
| } catch (NumberFormatException e) { |
| if (UIMAFramework.getLogger().isLoggable(Level.WARNING)) { |
| UIMAFramework.getLogger(this.getClass()).logrb(Level.WARNING, |
| this.getClass().getName(), "initialize", CPMUtils.CPM_LOG_RESOURCE_BUNDLE, |
| "UIMA_CPM_unknown_vns_command__WARNING", |
| new Object[] { Thread.currentThread().getName() }); |
| } |
| VinciFrame rtn = new VinciFrame(); |
| rtn.fadd("vinci:EXCEPTION", "CPM Reply: Invalid VNS Port value::" + publicVNSPort); |
| return rtn; |
| } |
| if (UIMAFramework.getLogger().isLoggable(Level.FINEST)) { |
| UIMAFramework.getLogger(this.getClass()).logrb(Level.FINEST, this.getClass().getName(), |
| "initialize", CPMUtils.CPM_LOG_RESOURCE_BUNDLE, "UIMA_CPM_vns_redirect__FINEST", |
| new Object[] { Thread.currentThread().getName(), publicVNSHost, publicVNSPort }); |
| } |
| BaseClient client = new BaseClient(publicVNSHost, pvnsPort); |
| return client.sendAndReceive(in); |
| } else { |
| if (UIMAFramework.getLogger().isLoggable(Level.WARNING)) { |
| UIMAFramework.getLogger(this.getClass()).logrb(Level.WARNING, this.getClass().getName(), |
| "initialize", CPMUtils.CPM_LOG_RESOURCE_BUNDLE, |
| "UIMA_CPM_unknown_vns_command__WARNING", |
| new Object[] { Thread.currentThread().getName() }); |
| } |
| VinciFrame rtn = new VinciFrame(); |
| rtn.fadd("vinci:EXCEPTION", "Unknown command"); |
| return rtn; |
| } |
| } catch (Exception ex) { |
| ex.printStackTrace(); |
| throw new ServiceException(ex.getMessage()); |
| } |
| } |
| |
| /** |
| * Stop the VNS service |
| * |
| */ |
| public void shutdown() { |
| if (UIMAFramework.getLogger().isLoggable(Level.INFO)) { |
| UIMAFramework.getLogger(this.getClass()).logrb(Level.INFO, this.getClass().getName(), |
| "process", CPMUtils.CPM_LOG_RESOURCE_BUNDLE, "UIMA_CPM_vns_shutdown__INFO", |
| new Object[] { Thread.currentThread().getName() }); |
| } |
| try { |
| this.cleanExit(); |
| if (server != null) { |
| server.shutdownServing(); |
| if (UIMAFramework.getLogger().isLoggable(Level.INFO)) { |
| UIMAFramework.getLogger(this.getClass()).logrb(Level.INFO, this.getClass().getName(), |
| "process", CPMUtils.CPM_LOG_RESOURCE_BUNDLE, |
| "UIMA_CPM_vns_stopped_serving__INFO", |
| new Object[] { Thread.currentThread().getName() }); |
| } |
| } |
| } catch (Exception e) { |
| e.printStackTrace(); |
| } |
| |
| } |
| |
| protected void finalize() throws Throwable { |
| if (UIMAFramework.getLogger().isLoggable(Level.FINEST)) { |
| UIMAFramework.getLogger(this.getClass()).log(Level.FINEST, |
| "*************Finalizing VNS***************"); |
| } |
| try { |
| shutdown(); |
| } finally { |
| super.finalize(); |
| } |
| } |
| |
| /** |
| * Starts VNS thread. This thread runs continuously waiting for service registrations and |
| * returning port number back. |
| */ |
| public void run() { |
| boolean done = false; |
| Thread.currentThread().setName("VNS-Thread"); |
| while (!done) { |
| try { |
| if (UIMAFramework.getLogger().isLoggable(Level.INFO)) { |
| UIMAFramework.getLogger(this.getClass()).logrb(Level.INFO, this.getClass().getName(), |
| "process", CPMUtils.CPM_LOG_RESOURCE_BUNDLE, |
| "UIMA_CPM_launching_local_vns__INFO", |
| new Object[] { Thread.currentThread().getName(), String.valueOf(vnsPort) }); |
| } |
| server = new VinciServer(this); |
| server.serve(vnsPort); |
| done = true; |
| } catch (BindException e) { |
| vnsPort++; |
| } catch (Exception e) { |
| |
| if (UIMAFramework.getLogger().isLoggable(Level.SEVERE)) { |
| UIMAFramework.getLogger(this.getClass()).logrb(Level.SEVERE, this.getClass().getName(), |
| "process", CPMUtils.CPM_LOG_RESOURCE_BUNDLE, |
| "UIMA_CPM_launching_local_vns_failed__SEVERE", |
| new Object[] { Thread.currentThread().getName(), e.getMessage() }); |
| } |
| e.printStackTrace(); |
| |
| } |
| } |
| } |
| } |