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         private final AtomicReference<Boolean> burstOnly = new AtomicReference<>();
  31
  32         public ModifyPeerCommandImpl(ExecutorService threadPool, ConnectionSupplier connectionSupplier) {
  33                 this.threadPool = MoreExecutors.listeningDecorator(threadPool);
  34                 this.connectionSupplier = connectionSupplier;
  35         }
  36
  37         @Override
  38         public ModifyPeerCommand enable() {
  39                 enabled.set(true);
  40                 return this;
  41         }
  42
  43         @Override
  44         public ModifyPeerCommand disable() {
  45                 enabled.set(false);
  46                 return this;
  47         }
  48
  49         @Override
  50         public ModifyPeerCommand allowLocalAddresses() {
  51                 allowLocalAddresses.set(true);
  52                 return this;
  53         }
  54
  55         @Override
  56         public ModifyPeerCommand disallowLocalAddresses() {
  57                 allowLocalAddresses.set(false);
  58                 return this;
  59         }
  60
  61         @Override
  62         public ModifyPeerCommand setBurstOnly() {
  63                 burstOnly.set(true);
  64                 return this;
  65         }
  66
  67         @Override
  68         public Executable<Optional<Peer>> byName(String name) {
  69                 nodeIdentifier.set(name);
  70                 return this::execute;
  71         }
  72
  73         @Override
  74         public Executable<Optional<Peer>> byIdentity(String nodeIdentity) {
  75                 nodeIdentifier.set(nodeIdentity);
  76                 return this::execute;
  77         }
  78
  79         @Override
  80         public Executable<Optional<Peer>> byHostAndPort(String host, int port) {
  81                 nodeIdentifier.set(String.format("%s:%d", host, port));
  82                 return this::execute;
  83         }
  84
  85         private ListenableFuture<Optional<Peer>> execute() {
  86                 return threadPool.submit(this::executeSequence);
  87         }
  88
  89         private Optional<Peer> executeSequence() throws IOException, ExecutionException, InterruptedException {
  90                 ModifyPeer modifyPeer = new ModifyPeer(new RandomIdentifierGenerator().generate(), nodeIdentifier.get());
  91                 Optional.ofNullable(enabled.get()).ifPresent(enabled -> modifyPeer.setEnabled(enabled));
  92                 Optional.ofNullable(allowLocalAddresses.get()).ifPresent(allowed -> modifyPeer.setAllowLocalAddresses(allowed));
  93                 Optional.ofNullable(burstOnly.get()).ifPresent(burstOnly -> modifyPeer.setBurstOnly(burstOnly));
  94                 try (ModifyPeerDialog modifyPeerDialog = new ModifyPeerDialog()) {
  95                         return modifyPeerDialog.send(modifyPeer).get();
  96                 }
  97         }
  98
  99         private class ModifyPeerDialog extends FcpDialog<Optional<Peer>> {
 100
 101                 private final AtomicBoolean finished = new AtomicBoolean();
 102                 private final AtomicReference<Peer> peer = new AtomicReference<>();
 103
 104                 public ModifyPeerDialog() throws IOException {
 105                         super(threadPool, connectionSupplier.get());
 106                 }
 107
 108                 @Override
 109                 protected boolean isFinished() {
 110                         return finished.get();
 111                 }
 112
 113                 @Override
 114                 protected Optional<Peer> getResult() {
 115                         return Optional.ofNullable(peer.get());
 116                 }
 117
 118                 @Override
 119                 protected void consumePeer(Peer peer) {
 120                         this.peer.set(peer);
 121                         finished.set(true);
 122                 }
 123
 124                 @Override
 125                 protected void consumeUnknownNodeIdentifier(UnknownNodeIdentifier unknownNodeIdentifier) {
 126                         finished.set(true);
 127                 }
 128
 129         }
 130
 131 }