src/net/pterodactylus/jsite/core/RequestManager.java

   1 /*
   2  * jSite2 - RequestManager.java -
   3  * Copyright © 2008 David Roden
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  18  */
  19
  20 package net.pterodactylus.jsite.core;
  21
  22 import java.io.IOException;
  23 import java.util.ArrayList;
  24 import java.util.Collections;
  25 import java.util.HashMap;
  26 import java.util.List;
  27 import java.util.Map;
  28 import java.util.Set;
  29 import java.util.logging.Level;
  30 import java.util.logging.Logger;
  31
  32 import net.pterodactylus.fcp.highlevel.HighLevelCallback;
  33 import net.pterodactylus.fcp.highlevel.HighLevelCallbackListener;
  34 import net.pterodactylus.fcp.highlevel.HighLevelClient;
  35 import net.pterodactylus.fcp.highlevel.HighLevelProgress;
  36 import net.pterodactylus.fcp.highlevel.HighLevelProgressListener;
  37 import net.pterodactylus.fcp.highlevel.RequestListResult;
  38 import net.pterodactylus.fcp.highlevel.RequestResult;
  39 import net.pterodactylus.util.logging.Logging;
  40
  41 /**
  42  * The request manager keeps track of all the request on all connected nodes.
  43  * The request manager is added to the {@link NodeManager} as a
  44  * {@link NodeListener} so that it can fire request-removed events in case a
  45  * node is disconnected.
  46  *
  47  * @author David ‘Bombe’ Roden &lt;bombe@freenetproject.org&gt;
  48  * @version $Id$
  49  */
  50 public class RequestManager implements NodeListener, HighLevelProgressListener {
  51
  52         /** Logger. */
  53         private static final Logger logger = Logging.getLogger(RequestManager.class.getName());
  54
  55         /** Request listeners. */
  56         private List<RequestListener> requestListeners = Collections.synchronizedList(new ArrayList<RequestListener>());
  57
  58         /** The node manager. */
  59         private NodeManager nodeManager;
  60
  61         /** Request lists for all nodes. */
  62         @SuppressWarnings("unused")
  63         private Map<Node, Set<Request>> nodeRequests = Collections.synchronizedMap(new HashMap<Node, Set<Request>>());
  64
  65         //
  66         // EVENT MANAGEMENT
  67         //
  68
  69         /**
  70          * Adds a request listener.
  71          *
  72          * @param requestListener
  73          *            The request listener to add
  74          */
  75         public void addRequestListener(RequestListener requestListener) {
  76                 requestListeners.add(requestListener);
  77         }
  78
  79         /**
  80          * Removes a request listener.
  81          *
  82          * @param requestListener
  83          *            The request listener to remove
  84          */
  85         public void removeRequestListener(RequestListener requestListener) {
  86                 requestListeners.remove(requestListener);
  87         }
  88
  89         /**
  90          * Notifies all listeners that a request was added.
  91          *
  92          * @param node
  93          *            The node that added the request
  94          * @param request
  95          *            The request that was added
  96          */
  97         private void fireRequestAdded(Node node, Request request) {
  98                 for (RequestListener requestListener: requestListeners) {
  99                         requestListener.requestAdded(node, request);
 100                 }
 101         }
 102
 103         /**
 104          * Notifies all listeners that a request progressed.
 105          *
 106          * @param node
 107          *            The node that runs the request
 108          * @param request
 109          *            The request
 110          * @param totalBlocks
 111          *            The total number of blocks
 112          * @param requiredBlocks
 113          *            The number of required blocks
 114          * @param successfulBlocks
 115          *            The number of successful blocks
 116          * @param failedBlocks
 117          *            The number of failed blocks
 118          * @param fatallyFailedBlocks
 119          *            The number of fatally failed blocks
 120          * @param finalizedTotal
 121          *            <code>true</code> if the total number of blocks in final,
 122          *            <code>false</code> otherwise
 123          */
 124         private void fireRequestProgressed(Node node, Request request, int totalBlocks, int requiredBlocks, int successfulBlocks, int failedBlocks, int fatallyFailedBlocks, boolean finalizedTotal) {
 125                 for (RequestListener requestListener: requestListeners) {
 126                         requestListener.requestProgressed(node, request, totalBlocks, requiredBlocks, successfulBlocks, failedBlocks, fatallyFailedBlocks, finalizedTotal);
 127                 }
 128         }
 129
 130         //
 131         // ACCESSORS
 132         //
 133
 134         /**
 135          * Sets the node manager to use.
 136          *
 137          * @param nodeManager
 138          *            The node manager
 139          */
 140         public void setNodeManager(NodeManager nodeManager) {
 141                 this.nodeManager = nodeManager;
 142         }
 143
 144         //
 145         // ACTIONS
 146         //
 147
 148         //
 149         // PRIVATE ACTIONS
 150         //
 151
 152         /**
 153          * Requests a list of all running requests from a node. This method will
 154          * block until the request has been sent!
 155          *
 156          * @param node
 157          *            The node to get all requests for
 158          * @throws IOException
 159          *             if an I/O error occurs while communicating with the node
 160          */
 161         private void getRequests(final Node node) throws IOException {
 162                 HighLevelClient highLevelClient = nodeManager.borrowHighLevelClient(node);
 163                 if (highLevelClient == null) {
 164                         logger.log(Level.WARNING, "no client for node: " + node);
 165                         return;
 166                 }
 167                 try {
 168                         HighLevelCallback<RequestListResult> requestListCallback = highLevelClient.getRequests();
 169                         requestListCallback.addHighLevelCallbackListener(new HighLevelCallbackListener<RequestListResult>() {
 170
 171                                 @SuppressWarnings("synthetic-access")
 172                                 public void gotResult(HighLevelCallback<RequestListResult> highLevelCallback) {
 173                                         RequestListResult requestListResult;
 174                                         try {
 175                                                 requestListResult = highLevelCallback.getResult();
 176                                         } catch (InterruptedException e) {
 177                                                 logger.log(Level.SEVERE, "getResult() blocked and was interrupted");
 178                                                 return;
 179                                         }
 180                                         for (RequestResult requestResult: requestListResult) {
 181                                                 Request request = new Request(requestResult.getIdentifier());
 182                                                 /* TODO - fill request */
 183                                                 fireRequestAdded(node, request);
 184                                         }
 185                                 }
 186                         });
 187                 } finally {
 188                         nodeManager.returnHighLevelClient(highLevelClient);
 189                 }
 190         }
 191
 192         //
 193         // INTERFACE NodeListener
 194         //
 195
 196         /**
 197          * {@inheritDoc}
 198          */
 199         public void nodeAdded(Node node) {
 200                 HighLevelClient highLevelClient = nodeManager.borrowHighLevelClient(node);
 201                 if (highLevelClient == null) {
 202                         return;
 203                 }
 204                 try {
 205                         highLevelClient.addHighLevelProgressListener(this);
 206                 } finally {
 207                         nodeManager.returnHighLevelClient(highLevelClient);
 208                 }
 209         }
 210
 211         /**
 212          * {@inheritDoc}
 213          */
 214         public void nodeRemoved(Node node) {
 215                 /* ignore. */
 216         }
 217
 218         /**
 219          * {@inheritDoc}
 220          */
 221         public void nodeConnected(Node node) {
 222                 HighLevelClient highLevelClient = nodeManager.borrowHighLevelClient(node);
 223                 if (highLevelClient == null) {
 224                         logger.log(Level.WARNING, "got no high-level client for node " + node);
 225                         return;
 226                 }
 227                 try {
 228                         highLevelClient.setWatchGlobal(true);
 229                 } catch (IOException ioe1) {
 230                         /* ignore exception, disconnects are handled elsewhere. */
 231                 } finally {
 232                         nodeManager.returnHighLevelClient(highLevelClient);
 233                 }
 234                 try {
 235                         getRequests(node);
 236                 } catch (IOException e) {
 237                         /* ignore exception, disconnects are handled elsewhere. */
 238                 }
 239         }
 240
 241         /**
 242          * {@inheritDoc}
 243          */
 244         public void nodeDisconnected(Node node, Throwable throwable) {
 245                 /* TODO - remove all requests. */
 246         }
 247
 248         //
 249         // INTERFACE HighLevelProgressListener
 250         //
 251
 252         /**
 253          * @see net.pterodactylus.fcp.highlevel.HighLevelProgressListener#progressReceived(java.lang.String,
 254          *      net.pterodactylus.fcp.highlevel.HighLevelProgress)
 255          */
 256         public void progressReceived(String identifier, HighLevelProgress highLevelProgress) {
 257                 fireRequestProgressed(null, new Request(identifier), highLevelProgress.getTotalBlocks(), highLevelProgress.getRequiredBlocks(), highLevelProgress.getSuccessfulBlocks(), highLevelProgress.getFailedBlocks(), highLevelProgress.getFatallyFailedBlocks(), highLevelProgress.isTotalFinalized());
 258         }
 259
 260 }