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

   1 package net.pterodactylus.fcp.quelaton;
   2
   3 import java.io.File;
   4 import java.io.IOException;
   5 import java.util.Optional;
   6 import java.util.concurrent.ExecutionException;
   7 import java.util.concurrent.ExecutorService;
   8 import java.util.concurrent.atomic.AtomicBoolean;
   9 import java.util.concurrent.atomic.AtomicReference;
  10
  11 import net.pterodactylus.fcp.AddPeer;
  12 import net.pterodactylus.fcp.Peer;
  13 import net.pterodactylus.fcp.ProtocolError;
  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 AddPeerCommand} implementation based on {@link FcpReplySequence}.
  21  *
  22  * @author <a href="mailto:bombe@freenetproject.org">David ‘Bombe’ Roden</a>
  23  */
  24 public class AddPeerCommandImpl implements AddPeerCommand {
  25
  26         private final ListeningExecutorService threadPool;
  27         private final ConnectionSupplier connectionSupplier;
  28         private final AtomicReference<File> file = new AtomicReference<>();
  29
  30         public AddPeerCommandImpl(ExecutorService threadPool, ConnectionSupplier connectionSupplier) {
  31                 this.threadPool = MoreExecutors.listeningDecorator(threadPool);
  32                 this.connectionSupplier = connectionSupplier;
  33         }
  34
  35         @Override
  36         public Executable<Optional<Peer>> withFile(File file) {
  37                 this.file.set(file);
  38                 return this::execute;
  39         }
  40
  41         private ListenableFuture<Optional<Peer>> execute() {
  42                 return threadPool.submit(this::executeSequence);
  43         }
  44
  45         private Optional<Peer> executeSequence() throws IOException, ExecutionException, InterruptedException {
  46                 AddPeer addPeer = null;
  47                 if (file.get() != null) {
  48                         addPeer = new AddPeer(new RandomIdentifierGenerator().generate(), file.get().getPath());
  49                 }
  50                 try (AddPeerSequence addPeerSequence = new AddPeerSequence()) {
  51                         return addPeerSequence.send(addPeer).get();
  52                 }
  53         }
  54
  55         private class AddPeerSequence extends FcpReplySequence<Optional<Peer>> {
  56
  57                 private final AtomicBoolean finished = new AtomicBoolean();
  58                 private final AtomicReference<Peer> peer = new AtomicReference<>();
  59
  60                 public AddPeerSequence() throws IOException {
  61                         super(threadPool, connectionSupplier.get());
  62                 }
  63
  64                 @Override
  65                 protected boolean isFinished() {
  66                         return finished.get();
  67                 }
  68
  69                 @Override
  70                 protected Optional<Peer> getResult() {
  71                         return Optional.ofNullable(peer.get());
  72                 }
  73
  74                 @Override
  75                 protected void consumePeer(Peer peer) {
  76                         this.peer.set(peer);
  77                         finished.set(true);
  78                 }
  79
  80                 @Override
  81                 protected void consumeProtocolError(ProtocolError protocolError) {
  82                         finished.set(true);
  83                 }
  84
  85         }
  86
  87 }