src/main/java/net/pterodactylus/fcp/quelaton/ListPeersCommandImpl.java

   1 package net.pterodactylus.fcp.quelaton;
   2
   3 import java.io.IOException;
   4 import java.util.Collection;
   5 import java.util.HashSet;
   6 import java.util.concurrent.ExecutorService;
   7 import java.util.concurrent.Future;
   8 import java.util.concurrent.atomic.AtomicBoolean;
   9
  10 import net.pterodactylus.fcp.EndListPeers;
  11 import net.pterodactylus.fcp.ListPeers;
  12 import net.pterodactylus.fcp.Peer;
  13
  14 import com.google.common.util.concurrent.ListeningExecutorService;
  15 import com.google.common.util.concurrent.MoreExecutors;
  16
  17 /**
  18  * Default {@link ListPeersCommand} implementation based on {@link FcpReplySequence}.
  19  *
  20  * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
  21  */
  22 public class ListPeersCommandImpl implements ListPeersCommand {
  23
  24         private final ListeningExecutorService threadPool;
  25         private final ConnectionSupplier connectionSupplier;
  26
  27         public ListPeersCommandImpl(ExecutorService threadPool, ConnectionSupplier connectionSupplier) {
  28                 this.threadPool = MoreExecutors.listeningDecorator(threadPool);
  29                 this.connectionSupplier = connectionSupplier;
  30         }
  31
  32         @Override
  33         public Future<Collection<Peer>> execute() {
  34                 String identifier = new RandomIdentifierGenerator().generate();
  35                 ListPeers listPeers = new ListPeers(identifier);
  36                 return threadPool.submit(() -> new ListPeersReplySequence().send(listPeers).get());
  37         }
  38
  39         private class ListPeersReplySequence extends FcpReplySequence<Collection<Peer>> {
  40
  41                 private final Collection<Peer> peers = new HashSet<>();
  42                 private final AtomicBoolean finished = new AtomicBoolean(false);
  43
  44                 public ListPeersReplySequence() throws IOException {
  45                         super(threadPool, connectionSupplier.get());
  46                 }
  47
  48                 @Override
  49                 protected boolean isFinished() {
  50                         return finished.get();
  51                 }
  52
  53                 @Override
  54                 protected Collection<Peer> getResult() {
  55                         return peers;
  56                 }
  57
  58                 @Override
  59                 protected void consumePeer(Peer peer) {
  60                         peers.add(peer);
  61                 }
  62
  63                 @Override
  64                 protected void consumeEndListPeers(EndListPeers endListPeers) {
  65                         finished.set(true);
  66                 }
  67
  68         }
  69
  70 }