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         private final AtomicReference<Boolean> allowLocalAddresses = new AtomicReference<>();
  30
  31         public ModifyPeerCommandImpl(ExecutorService threadPool, ConnectionSupplier connectionSupplier) {
  32                 this.threadPool = MoreExecutors.listeningDecorator(threadPool);
  33                 this.connectionSupplier = connectionSupplier;
  34         }
  35
  36         @Override
  37         public ModifyPeerCommand enable() {
  38                 enabled.set(true);
  39                 return this;
  40         }
  41
  42         @Override
  43         public ModifyPeerCommand disable() {
  44                 enabled.set(false);
  45                 return this;
  46         }
  47
  48         @Override
  49         public ModifyPeerCommand allowLocalAddresses() {
  50                 allowLocalAddresses.set(true);
  51                 return this;
  52         }
  53
  54         @Override
  55         public ModifyPeerCommand disallowLocalAddresses() {
  56                 allowLocalAddresses.set(false);
  57                 return this;
  58         }
  59
  60         @Override
  61         public Executable<Optional<Peer>> byName(String name) {
  62                 nodeIdentifier.set(name);
  63                 return this::execute;
  64         }
  65
  66         @Override
  67         public Executable<Optional<Peer>> byIdentity(String nodeIdentity) {
  68                 nodeIdentifier.set(nodeIdentity);
  69                 return this::execute;
  70         }
  71
  72         @Override
  73         public Executable<Optional<Peer>> byHostAndPort(String host, int port) {
  74                 nodeIdentifier.set(String.format("%s:%d", host, port));
  75                 return this::execute;
  76         }
  77
  78         private ListenableFuture<Optional<Peer>> execute() {
  79                 return threadPool.submit(this::executeSequence);
  80         }
  81
  82         private Optional<Peer> executeSequence() throws IOException, ExecutionException, InterruptedException {
  83                 ModifyPeer modifyPeer = new ModifyPeer(new RandomIdentifierGenerator().generate(), nodeIdentifier.get());
  84                 Optional.ofNullable(enabled.get()).ifPresent(enabled -> modifyPeer.setEnabled(enabled));
  85                 Optional.ofNullable(allowLocalAddresses.get()).ifPresent(allowed -> modifyPeer.setAllowLocalAddresses(allowed));
  86                 try (ModifyPeerDialog modifyPeerDialog = new ModifyPeerDialog()) {
  87                         return modifyPeerDialog.send(modifyPeer).get();
  88                 }
  89         }
  90
  91         private class ModifyPeerDialog extends FcpDialog<Optional<Peer>> {
  92
  93                 private final AtomicBoolean finished = new AtomicBoolean();
  94                 private final AtomicReference<Peer> peer = new AtomicReference<>();
  95
  96                 public ModifyPeerDialog() throws IOException {
  97                         super(threadPool, connectionSupplier.get());
  98                 }
  99
 100                 @Override
 101                 protected boolean isFinished() {
 102                         return finished.get();
 103                 }
 104
 105                 @Override
 106                 protected Optional<Peer> getResult() {
 107                         return Optional.ofNullable(peer.get());
 108                 }
 109
 110                 @Override
 111                 protected void consumePeer(Peer peer) {
 112                         this.peer.set(peer);
 113                         finished.set(true);
 114                 }
 115
 116                 @Override
 117                 protected void consumeUnknownNodeIdentifier(UnknownNodeIdentifier unknownNodeIdentifier) {
 118                         finished.set(true);
 119                 }
 120
 121         }
 122
 123 }