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.ListenableFuture;
  15 import com.google.common.util.concurrent.ListeningExecutorService;
  16 import com.google.common.util.concurrent.MoreExecutors;
  17
  18 /**
  19  * Default {@link ListPeersCommand} implementation based on {@link FcpReplySequence}.
  20  *
  21  * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
  22  */
  23 public class ListPeersCommandImpl implements ListPeersCommand {
  24
  25         private final ListeningExecutorService threadPool;
  26         private final ConnectionSupplier connectionSupplier;
  27         private final AtomicBoolean includeMetadata = new AtomicBoolean(false);
  28         private final AtomicBoolean includeVolatile = new AtomicBoolean(false);
  29
  30         public ListPeersCommandImpl(ExecutorService threadPool, ConnectionSupplier connectionSupplier) {
  31                 this.threadPool = MoreExecutors.listeningDecorator(threadPool);
  32                 this.connectionSupplier = connectionSupplier;
  33         }
  34
  35         @Override
  36         public ListPeersCommand includeMetadata() {
  37                 includeMetadata.set(true);
  38                 return this;
  39         }
  40
  41         @Override
  42         public ListPeersCommand includeVolatile() {
  43                 includeVolatile.set(true);
  44                 return this;
  45         }
  46
  47         @Override
  48         public ListenableFuture<Collection<Peer>> execute() {
  49                 String identifier = new RandomIdentifierGenerator().generate();
  50                 ListPeers listPeers = new ListPeers(identifier, includeMetadata.get(), includeVolatile.get());
  51                 return threadPool.submit(() -> new ListPeersReplySequence().send(listPeers).get());
  52         }
  53
  54         private class ListPeersReplySequence extends FcpReplySequence<Collection<Peer>> {
  55
  56                 private final Collection<Peer> peers = new HashSet<>();
  57                 private final AtomicBoolean finished = new AtomicBoolean(false);
  58
  59                 public ListPeersReplySequence() throws IOException {
  60                         super(threadPool, connectionSupplier.get());
  61                 }
  62
  63                 @Override
  64                 protected boolean isFinished() {
  65                         return finished.get();
  66                 }
  67
  68                 @Override
  69                 protected Collection<Peer> getResult() {
  70                         return peers;
  71                 }
  72
  73                 @Override
  74                 protected void consumePeer(Peer peer) {
  75                         peers.add(peer);
  76                 }
  77
  78                 @Override
  79                 protected void consumeEndListPeers(EndListPeers endListPeers) {
  80                         finished.set(true);
  81                 }
  82
  83         }
  84
  85 }