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.logging.Level;
  29 import java.util.logging.Logger;
  30
  31 import net.pterodactylus.fcp.highlevel.HighLevelCallback;
  32 import net.pterodactylus.fcp.highlevel.HighLevelCallbackListener;
  33 import net.pterodactylus.fcp.highlevel.HighLevelClient;
  34 import net.pterodactylus.fcp.highlevel.HighLevelProgress;
  35 import net.pterodactylus.fcp.highlevel.HighLevelProgressListener;
  36 import net.pterodactylus.fcp.highlevel.RequestListResult;
  37 import net.pterodactylus.fcp.highlevel.RequestResult;
  38 import net.pterodactylus.util.logging.Logging;
  39
  40 /**
  41  * The request manager keeps track of all the request on all connected nodes.
  42  * The request manager is added to the {@link NodeManager} as a
  43  * {@link NodeListener} so that it can fire request-removed events in case a
  44  * node is disconnected.
  45  *
  46  * @author David ‘Bombe’ Roden &lt;bombe@freenetproject.org&gt;
  47  * @version $Id$
  48  */
  49 public class RequestManager implements NodeListener, HighLevelProgressListener {
  50
  51         /** Logger. */
  52         private static final Logger logger = Logging.getLogger(RequestManager.class.getName());
  53
  54         /** Request listeners. */
  55         private List<RequestListener> requestListeners = Collections.synchronizedList(new ArrayList<RequestListener>());
  56
  57         /** The node manager. */
  58         private NodeManager nodeManager;
  59
  60         /** Request lists for all nodes. */
  61         @SuppressWarnings("unused")
  62         private Map<Node, Map<String, Request>> nodeRequests = Collections.synchronizedMap(new HashMap<Node, Map<String, Request>>());
  63
  64         //
  65         // EVENT MANAGEMENT
  66         //
  67
  68         /**
  69          * Adds a request listener.
  70          *
  71          * @param requestListener
  72          *            The request listener to add
  73          */
  74         public void addRequestListener(RequestListener requestListener) {
  75                 requestListeners.add(requestListener);
  76         }
  77
  78         /**
  79          * Removes a request listener.
  80          *
  81          * @param requestListener
  82          *            The request listener to remove
  83          */
  84         public void removeRequestListener(RequestListener requestListener) {
  85                 requestListeners.remove(requestListener);
  86         }
  87
  88         /**
  89          * Notifies all listeners that a request was added.
  90          *
  91          * @param request
  92          *            The request that was added
  93          */
  94         private void fireRequestAdded(Request request) {
  95                 for (RequestListener requestListener: requestListeners) {
  96                         requestListener.requestAdded(request);
  97                 }
  98         }
  99
 100         /**
 101          * Notifies all listeners that a request progressed.
 102          *
 103          * @param request
 104          *            The request
 105          */
 106         private void fireRequestProgressed(Request request) {
 107                 for (RequestListener requestListener: requestListeners) {
 108                         requestListener.requestProgressed(request);
 109                 }
 110         }
 111
 112         /**
 113          * Notifies all listeners that a request was removed.
 114          *
 115          * @param request
 116          *            The request that was removed
 117          */
 118         private void fireRequestRemoved(Request request) {
 119                 for (RequestListener requestListener: requestListeners) {
 120                         requestListener.requestRemoved(request);
 121                 }
 122         }
 123
 124         //
 125         // ACCESSORS
 126         //
 127
 128         /**
 129          * Sets the node manager to use.
 130          *
 131          * @param nodeManager
 132          *            The node manager
 133          */
 134         public void setNodeManager(NodeManager nodeManager) {
 135                 this.nodeManager = nodeManager;
 136         }
 137
 138         //
 139         // ACTIONS
 140         //
 141
 142         //
 143         // PRIVATE ACTIONS
 144         //
 145
 146         /**
 147          * Requests a list of all running requests from a node. This method will
 148          * block until the request has been sent!
 149          *
 150          * @param node
 151          *            The node to get all requests for
 152          * @throws IOException
 153          *             if an I/O error occurs while communicating with the node
 154          */
 155         private void getRequests(final Node node) throws IOException {
 156                 HighLevelClient highLevelClient = nodeManager.getHighLevelClient(node);
 157                 if (highLevelClient == null) {
 158                         logger.log(Level.WARNING, "no client for node: " + node);
 159                         return;
 160                 }
 161                 final Map<String, Request> identifierRequests = new HashMap<String, Request>();
 162                 nodeRequests.put(node, identifierRequests);
 163                 HighLevelCallback<RequestListResult> requestListCallback = highLevelClient.getRequests();
 164                 requestListCallback.addHighLevelCallbackListener(new HighLevelCallbackListener<RequestListResult>() {
 165
 166                         @SuppressWarnings("synthetic-access")
 167                         public void gotResult(HighLevelCallback<RequestListResult> highLevelCallback) {
 168                                 RequestListResult requestListResult;
 169                                 try {
 170                                         requestListResult = highLevelCallback.getResult();
 171                                 } catch (InterruptedException e) {
 172                                         logger.log(Level.SEVERE, "getResult() blocked and was interrupted");
 173                                         return;
 174                                 }
 175                                 for (RequestResult requestResult: requestListResult) {
 176                                         Request request = new Request(node, requestResult.getIdentifier());
 177                                         identifierRequests.put(requestResult.getIdentifier(), request);
 178                                         /* TODO - fill request */
 179                                         fireRequestAdded(request);
 180                                 }
 181                         }
 182                 });
 183         }
 184
 185         //
 186         // INTERFACE NodeListener
 187         //
 188
 189         /**
 190          * {@inheritDoc}
 191          */
 192         public void nodeAdded(Node node) {
 193                 HighLevelClient highLevelClient = nodeManager.getHighLevelClient(node);
 194                 if (highLevelClient == null) {
 195                         logger.warning("got nodeAdded but no high-level client: " + node);
 196                         return;
 197                 }
 198                 highLevelClient.addHighLevelProgressListener(this);
 199         }
 200
 201         /**
 202          * {@inheritDoc}
 203          */
 204         public void nodeRemoved(Node node) {
 205                 HighLevelClient highLevelClient = nodeManager.getHighLevelClient(node);
 206                 if (highLevelClient == null) {
 207                         logger.warning("got nodeRemoved but no high-level client: " + node);
 208                         return;
 209                 }
 210                 highLevelClient.removeHighLevelProgressListener(this);
 211         }
 212
 213         /**
 214          * {@inheritDoc}
 215          */
 216         public void nodeConnected(Node node) {
 217                 HighLevelClient highLevelClient = nodeManager.getHighLevelClient(node);
 218                 if (highLevelClient == null) {
 219                         logger.log(Level.WARNING, "got no high-level client for node " + node);
 220                         return;
 221                 }
 222                 try {
 223                         highLevelClient.setWatchGlobal(true);
 224                         getRequests(node);
 225                 } catch (IOException e) {
 226                         /* ignore exception, disconnects are handled elsewhere. */
 227                 }
 228         }
 229
 230         /**
 231          * {@inheritDoc}
 232          */
 233         public void nodeConnectionFailed(Node node, Throwable cause) {
 234                 /* we don't care about this. */
 235         }
 236
 237         /**
 238          * {@inheritDoc}
 239          */
 240         public void nodeDisconnected(Node node, Throwable throwable) {
 241                 Map<String, Request> identifierRequests = nodeRequests.get(node);
 242                 if (identifierRequests == null) {
 243                         logger.warning("got node without request map: " + node);
 244                         return;
 245                 }
 246                 for (Request request: identifierRequests.values()) {
 247                         fireRequestRemoved(request);
 248                 }
 249                 identifierRequests.clear();
 250         }
 251
 252         //
 253         // INTERFACE HighLevelProgressListener
 254         //
 255
 256         /**
 257          * @see net.pterodactylus.fcp.highlevel.HighLevelProgressListener#progressReceived(HighLevelClient,
 258          *      String, HighLevelProgress)
 259          */
 260         public void progressReceived(HighLevelClient highLevelClient, String identifier, HighLevelProgress highLevelProgress) {
 261                 Node node = nodeManager.getNode(highLevelClient);
 262                 if (node == null) {
 263                         logger.warning("got high-level client without node: " + highLevelClient);
 264                         return;
 265                 }
 266                 Map<String, Request> identifierRequests = nodeRequests.get(node);
 267                 if (identifierRequests == null) {
 268                         logger.warning("got node without request map: " + node);
 269                         return;
 270                 }
 271                 Request request = identifierRequests.get(identifier);
 272                 if (request == null) {
 273                         logger.warning("got progress for unknown request: " + identifier);
 274                         return;
 275                 }
 276                 request.setTotalBlocks(highLevelProgress.getTotalBlocks());
 277                 request.setRequiredBlocks(highLevelProgress.getRequiredBlocks());
 278                 request.setSuccessfulBlocks(highLevelProgress.getSuccessfulBlocks());
 279                 request.setFailedBlocks(highLevelProgress.getFailedBlocks());
 280                 request.setFatallyFailedBlocks(highLevelProgress.getFatallyFailedBlocks());
 281                 request.setTotalFinalized(highLevelProgress.isTotalFinalized());
 282                 fireRequestProgressed(request);
 283         }
 284
 285 }