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.AtomicReference;
   8 import java.util.function.Supplier;
   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 Supplier<String> identifierGenerator;
  29         private final AtomicReference<String> nodeIdentifier = new AtomicReference<>();
  30
  31         public ListPeerNotesCommandImpl(ExecutorService threadPool, ConnectionSupplier connectionSupplier, Supplier<String> identifierGenerator) {
  32                 this.threadPool = MoreExecutors.listeningDecorator(threadPool);
  33                 this.connectionSupplier = connectionSupplier;
  34                 this.identifierGenerator = identifierGenerator;
  35         }
  36
  37         @Override
  38         public Executable<Optional<PeerNote>> byName(String name) {
  39                 nodeIdentifier.set(name);
  40                 return this::execute;
  41         }
  42
  43         @Override
  44         public Executable<Optional<PeerNote>> byIdentity(String identity) {
  45                 nodeIdentifier.set(identity);
  46                 return this::execute;
  47         }
  48
  49         @Override
  50         public Executable<Optional<PeerNote>> byHostAndPort(String host, int port) {
  51                 nodeIdentifier.set(String.format("%s:%d", host, port));
  52                 return this::execute;
  53         }
  54
  55         private ListenableFuture<Optional<PeerNote>> execute() {
  56                 return threadPool.submit(this::executeDialog);
  57         }
  58
  59         private Optional<PeerNote> executeDialog() throws IOException, ExecutionException, InterruptedException {
  60                 ListPeerNotes listPeerNotes = new ListPeerNotes(identifierGenerator.get(), nodeIdentifier.get());
  61                 try (ListPeerNotesDialog listPeerNotesDialog = new ListPeerNotesDialog()) {
  62                         return listPeerNotesDialog.send(listPeerNotes).get();
  63                 }
  64         }
  65
  66         private class ListPeerNotesDialog extends FcpDialog<Optional<PeerNote>> {
  67
  68                 public ListPeerNotesDialog() throws IOException {
  69                         super(threadPool, connectionSupplier.get(), Optional.<PeerNote>empty());
  70                 }
  71
  72                 @Override
  73                 protected void consumePeerNote(PeerNote peerNote) {
  74                         setResult(Optional.ofNullable(peerNote));
  75                 }
  76
  77                 @Override
  78                 protected void consumeEndListPeerNotes(EndListPeerNotes endListPeerNotes) {
  79                         finish();
  80                 }
  81
  82                 @Override
  83                 protected void consumeUnknownNodeIdentifier(UnknownNodeIdentifier unknownNodeIdentifier) {
  84                         finish();
  85                 }
  86
  87         }
  88
  89 }