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

   1 package net.pterodactylus.fcp.quelaton;
   2
   3 import java.io.File;
   4 import java.io.IOException;
   5 import java.net.URL;
   6 import java.util.Optional;
   7 import java.util.concurrent.ExecutionException;
   8 import java.util.concurrent.ExecutorService;
   9 import java.util.concurrent.atomic.AtomicBoolean;
  10 import java.util.concurrent.atomic.AtomicReference;
  11
  12 import net.pterodactylus.fcp.AddPeer;
  13 import net.pterodactylus.fcp.Peer;
  14 import net.pterodactylus.fcp.ProtocolError;
  15
  16 import com.google.common.util.concurrent.ListenableFuture;
  17 import com.google.common.util.concurrent.ListeningExecutorService;
  18 import com.google.common.util.concurrent.MoreExecutors;
  19
  20 /**
  21  * Default {@link AddPeerCommand} implementation based on {@link FcpReplySequence}.
  22  *
  23  * @author <a href="mailto:bombe@freenetproject.org">David ‘Bombe’ Roden</a>
  24  */
  25 public class AddPeerCommandImpl implements AddPeerCommand {
  26
  27         private final ListeningExecutorService threadPool;
  28         private final ConnectionSupplier connectionSupplier;
  29         private final AtomicReference<File> file = new AtomicReference<>();
  30         private final AtomicReference<URL> url = new AtomicReference<>();
  31
  32         public AddPeerCommandImpl(ExecutorService threadPool, ConnectionSupplier connectionSupplier) {
  33                 this.threadPool = MoreExecutors.listeningDecorator(threadPool);
  34                 this.connectionSupplier = connectionSupplier;
  35         }
  36
  37         @Override
  38         public Executable<Optional<Peer>> withFile(File file) {
  39                 this.file.set(file);
  40                 return this::execute;
  41         }
  42
  43         @Override
  44         public Executable<Optional<Peer>> fromURL(URL url) {
  45                 this.url.set(url);
  46                 return this::execute;
  47         }
  48
  49         private ListenableFuture<Optional<Peer>> execute() {
  50                 return threadPool.submit(this::executeSequence);
  51         }
  52
  53         private Optional<Peer> executeSequence() throws IOException, ExecutionException, InterruptedException {
  54                 AddPeer addPeer = null;
  55                 if (file.get() != null) {
  56                         addPeer = new AddPeer(new RandomIdentifierGenerator().generate(), file.get().getPath());
  57                 } else if (url.get() != null) {
  58                         addPeer = new AddPeer(new RandomIdentifierGenerator().generate(), url.get());
  59                 }
  60                 try (AddPeerSequence addPeerSequence = new AddPeerSequence()) {
  61                         return addPeerSequence.send(addPeer).get();
  62                 }
  63         }
  64
  65         private class AddPeerSequence extends FcpReplySequence<Optional<Peer>> {
  66
  67                 private final AtomicBoolean finished = new AtomicBoolean();
  68                 private final AtomicReference<Peer> peer = new AtomicReference<>();
  69
  70                 public AddPeerSequence() 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<Peer> getResult() {
  81                         return Optional.ofNullable(peer.get());
  82                 }
  83
  84                 @Override
  85                 protected void consumePeer(Peer peer) {
  86                         this.peer.set(peer);
  87                         finished.set(true);
  88                 }
  89
  90                 @Override
  91                 protected void consumeProtocolError(ProtocolError protocolError) {
  92                         finished.set(true);
  93                 }
  94
  95         }
  96
  97 }