src/main/java/net/pterodactylus/fcp/quelaton/ModifyPeerCommandImpl.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.ModifyPeer;
  11 import net.pterodactylus.fcp.Peer;
  12 import net.pterodactylus.fcp.UnknownNodeIdentifier;
  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 ModifyPeerCommand} implementation based on {@link FcpDialog}.
  20  *
  21  * @author <a href="mailto:bombe@freenetproject.org">David ‘Bombe’ Roden</a>
  22  */
  23 public class ModifyPeerCommandImpl implements ModifyPeerCommand {
  24
  25         private final ListeningExecutorService threadPool;
  26         private final ConnectionSupplier connectionSupplier;
  27         private final AtomicReference<String> nodeIdentifier = new AtomicReference<>();
  28         private final AtomicReference<Boolean> enabled = new AtomicReference<>();
  29
  30         public ModifyPeerCommandImpl(ExecutorService threadPool, ConnectionSupplier connectionSupplier) {
  31                 this.threadPool = MoreExecutors.listeningDecorator(threadPool);
  32                 this.connectionSupplier = connectionSupplier;
  33         }
  34
  35         @Override
  36         public ModifyPeerCommand enable() {
  37                 enabled.set(true);
  38                 return this;
  39         }
  40
  41         @Override
  42         public ModifyPeerCommand disable() {
  43                 enabled.set(false);
  44                 return this;
  45         }
  46
  47         @Override
  48         public Executable<Optional<Peer>> byName(String name) {
  49                 nodeIdentifier.set(name);
  50                 return this::execute;
  51         }
  52
  53         @Override
  54         public Executable<Optional<Peer>> byIdentity(String nodeIdentity) {
  55                 nodeIdentifier.set(nodeIdentity);
  56                 return this::execute;
  57         }
  58
  59         private ListenableFuture<Optional<Peer>> execute() {
  60                 return threadPool.submit(this::executeSequence);
  61         }
  62
  63         private Optional<Peer> executeSequence() throws IOException, ExecutionException, InterruptedException {
  64                 ModifyPeer modifyPeer = new ModifyPeer(new RandomIdentifierGenerator().generate(), nodeIdentifier.get());
  65                 Optional.ofNullable(enabled.get()).ifPresent(enabled -> modifyPeer.setEnabled(enabled));
  66                 try (ModifyPeerDialog modifyPeerDialog = new ModifyPeerDialog()) {
  67                         return modifyPeerDialog.send(modifyPeer).get();
  68                 }
  69         }
  70
  71         private class ModifyPeerDialog extends FcpDialog<Optional<Peer>> {
  72
  73                 private final AtomicBoolean finished = new AtomicBoolean();
  74                 private final AtomicReference<Peer> peer = new AtomicReference<>();
  75
  76                 public ModifyPeerDialog() throws IOException {
  77                         super(threadPool, connectionSupplier.get());
  78                 }
  79
  80                 @Override
  81                 protected boolean isFinished() {
  82                         return finished.get();
  83                 }
  84
  85                 @Override
  86                 protected Optional<Peer> getResult() {
  87                         return Optional.ofNullable(peer.get());
  88                 }
  89
  90                 @Override
  91                 protected void consumePeer(Peer peer) {
  92                         this.peer.set(peer);
  93                         finished.set(true);
  94                 }
  95
  96                 @Override
  97                 protected void consumeUnknownNodeIdentifier(UnknownNodeIdentifier unknownNodeIdentifier) {
  98                         finished.set(true);
  99                 }
 100
 101         }
 102
 103 }