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

   1 package net.pterodactylus.fcp.quelaton;
   2
   3 import java.io.IOException;
   4 import java.util.Optional;
   5 import java.util.concurrent.ExecutionException;
   6 import java.util.concurrent.ExecutorService;
   7 import java.util.concurrent.atomic.AtomicBoolean;
   8 import java.util.concurrent.atomic.AtomicReference;
   9
  10 import net.pterodactylus.fcp.EndListPeerNotes;
  11 import net.pterodactylus.fcp.ListPeerNotes;
  12 import net.pterodactylus.fcp.PeerNote;
  13 import net.pterodactylus.fcp.UnknownNodeIdentifier;
  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 ListPeerNotesCommand} implementation based on {@link FcpDialog}.
  21  *
  22  * @author <a href="mailto:bombe@freenetproject.org">David ‘Bombe’ Roden</a>
  23  */
  24 public class ListPeerNotesCommandImpl implements ListPeerNotesCommand {
  25
  26         private final ListeningExecutorService threadPool;
  27         private final ConnectionSupplier connectionSupplier;
  28         private final AtomicReference<String> nodeIdentifier = new AtomicReference<>();
  29
  30         public ListPeerNotesCommandImpl(ExecutorService threadPool, ConnectionSupplier connectionSupplier) {
  31                 this.threadPool = MoreExecutors.listeningDecorator(threadPool);
  32                 this.connectionSupplier = connectionSupplier;
  33         }
  34
  35         @Override
  36         public Executable<Optional<PeerNote>> byName(String name) {
  37                 nodeIdentifier.set(name);
  38                 return this::execute;
  39         }
  40
  41         @Override
  42         public Executable<Optional<PeerNote>> byIdentity(String identity) {
  43                 nodeIdentifier.set(identity);
  44                 return this::execute;
  45         }
  46
  47         @Override
  48         public Executable<Optional<PeerNote>> byHostAndPort(String host, int port) {
  49                 nodeIdentifier.set(String.format("%s:%d", host, port));
  50                 return this::execute;
  51         }
  52
  53         private ListenableFuture<Optional<PeerNote>> execute() {
  54                 return threadPool.submit(this::executeDialog);
  55         }
  56
  57         private Optional<PeerNote> executeDialog() throws IOException, ExecutionException, InterruptedException {
  58                 ListPeerNotes listPeerNotes =
  59                         new ListPeerNotes(new RandomIdentifierGenerator().generate(), nodeIdentifier.get());
  60                 try (ListPeerNotesDialog listPeerNotesDialog = new ListPeerNotesDialog()) {
  61                         return listPeerNotesDialog.send(listPeerNotes).get();
  62                 }
  63         }
  64
  65         private class ListPeerNotesDialog extends FcpDialog<Optional<PeerNote>> {
  66
  67                 private final AtomicReference<PeerNote> peerNote = new AtomicReference<>();
  68                 private final AtomicBoolean finished = new AtomicBoolean();
  69
  70                 public ListPeerNotesDialog() throws IOException {
  71                         super(threadPool, connectionSupplier.get());
  72                 }
  73
  74                 @Override
  75                 protected boolean isFinished() {
  76                         return finished.get();
  77                 }
  78
  79                 @Override
  80                 protected Optional<PeerNote> getResult() {
  81                         return Optional.ofNullable(peerNote.get());
  82                 }
  83
  84                 @Override
  85                 protected void consumePeerNote(PeerNote peerNote) {
  86                         this.peerNote.set(peerNote);
  87                 }
  88
  89                 @Override
  90                 protected void consumeEndListPeerNotes(EndListPeerNotes endListPeerNotes) {
  91                         finished.set(true);
  92                 }
  93
  94                 @Override
  95                 protected void consumeUnknownNodeIdentifier(UnknownNodeIdentifier unknownNodeIdentifier) {
  96                         finished.set(true);
  97                 }
  98
  99         }
 100
 101 }