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.ExecutionException;
   7 import java.util.concurrent.ExecutorService;
   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                 return threadPool.submit(this::executeSequence);
  50         }
  51
  52         private Collection<Peer> executeSequence() throws InterruptedException, ExecutionException, IOException {
  53                 String identifier = new RandomIdentifierGenerator().generate();
  54                 ListPeers listPeers = new ListPeers(identifier, includeMetadata.get(), includeVolatile.get());
  55                 try (ListPeersReplySequence listPeersReplySequence = new ListPeersReplySequence()) {
  56                         return listPeersReplySequence.send(listPeers).get();
  57                 }
  58         }
  59
  60         private class ListPeersReplySequence extends FcpReplySequence<Collection<Peer>> {
  61
  62                 private final Collection<Peer> peers = new HashSet<>();
  63                 private final AtomicBoolean finished = new AtomicBoolean(false);
  64
  65                 public ListPeersReplySequence() throws IOException {
  66                         super(threadPool, connectionSupplier.get());
  67                 }
  68
  69                 @Override
  70                 protected boolean isFinished() {
  71                         return finished.get();
  72                 }
  73
  74                 @Override
  75                 protected Collection<Peer> getResult() {
  76                         return peers;
  77                 }
  78
  79                 @Override
  80                 protected void consumePeer(Peer peer) {
  81                         peers.add(peer);
  82                 }
  83
  84                 @Override
  85                 protected void consumeEndListPeers(EndListPeers endListPeers) {
  86                         finished.set(true);
  87                 }
  88
  89         }
  90
  91 }