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 import java.util.function.Supplier;
  10
  11 import net.pterodactylus.fcp.EndListPeers;
  12 import net.pterodactylus.fcp.ListPeers;
  13 import net.pterodactylus.fcp.Peer;
  14
  15 import com.google.common.util.concurrent.ListenableFuture;
  16 import com.google.common.util.concurrent.ListeningExecutorService;
  17 import com.google.common.util.concurrent.MoreExecutors;
  18
  19 /**
  20  * Default {@link ListPeersCommand} implementation based on {@link FcpDialog}.
  21  *
  22  * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
  23  */
  24 public class ListPeersCommandImpl implements ListPeersCommand {
  25
  26         private final ListeningExecutorService threadPool;
  27         private final ConnectionSupplier connectionSupplier;
  28         private final Supplier<String> identifierGenerator;
  29         private final AtomicBoolean includeMetadata = new AtomicBoolean(false);
  30         private final AtomicBoolean includeVolatile = new AtomicBoolean(false);
  31
  32         public ListPeersCommandImpl(ExecutorService threadPool, ConnectionSupplier connectionSupplier, Supplier<String> identifierGenerator) {
  33                 this.threadPool = MoreExecutors.listeningDecorator(threadPool);
  34                 this.connectionSupplier = connectionSupplier;
  35                 this.identifierGenerator = identifierGenerator;
  36         }
  37
  38         @Override
  39         public ListPeersCommand includeMetadata() {
  40                 includeMetadata.set(true);
  41                 return this;
  42         }
  43
  44         @Override
  45         public ListPeersCommand includeVolatile() {
  46                 includeVolatile.set(true);
  47                 return this;
  48         }
  49
  50         @Override
  51         public ListenableFuture<Collection<Peer>> execute() {
  52                 return threadPool.submit(this::executeDialog);
  53         }
  54
  55         private Collection<Peer> executeDialog() throws InterruptedException, ExecutionException, IOException {
  56                 ListPeers listPeers = new ListPeers(identifierGenerator.get(), includeMetadata.get(), includeVolatile.get());
  57                 try (ListPeersDialog listPeersDialog = new ListPeersDialog()) {
  58                         return listPeersDialog.send(listPeers).get();
  59                 }
  60         }
  61
  62         private class ListPeersDialog extends FcpDialog<Collection<Peer>> {
  63
  64                 private final Collection<Peer> peers = new HashSet<>();
  65                 private final AtomicBoolean finished = new AtomicBoolean(false);
  66
  67                 public ListPeersDialog() throws IOException {
  68                         super(threadPool, connectionSupplier.get());
  69                 }
  70
  71                 @Override
  72                 protected boolean isFinished() {
  73                         return finished.get();
  74                 }
  75
  76                 @Override
  77                 protected Collection<Peer> getResult() {
  78                         return peers;
  79                 }
  80
  81                 @Override
  82                 protected void consumePeer(Peer peer) {
  83                         peers.add(peer);
  84                 }
  85
  86                 @Override
  87                 protected void consumeEndListPeers(EndListPeers endListPeers) {
  88                         finished.set(true);
  89                 }
  90
  91         }
  92
  93 }