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.NodeRef;
  14 import net.pterodactylus.fcp.Peer;
  15 import net.pterodactylus.fcp.ProtocolError;
  16
  17 import com.google.common.util.concurrent.ListenableFuture;
  18 import com.google.common.util.concurrent.ListeningExecutorService;
  19 import com.google.common.util.concurrent.MoreExecutors;
  20
  21 /**
  22  * Default {@link AddPeerCommand} implementation based on {@link FcpDialog}.
  23  *
  24  * @author <a href="mailto:bombe@freenetproject.org">David ‘Bombe’ Roden</a>
  25  */
  26 public class AddPeerCommandImpl implements AddPeerCommand {
  27
  28         private final ListeningExecutorService threadPool;
  29         private final ConnectionSupplier connectionSupplier;
  30         private final AtomicReference<File> file = new AtomicReference<>();
  31         private final AtomicReference<URL> url = new AtomicReference<>();
  32         private final AtomicReference<NodeRef> nodeRef = new AtomicReference<>();
  33
  34         public AddPeerCommandImpl(ExecutorService threadPool, ConnectionSupplier connectionSupplier) {
  35                 this.threadPool = MoreExecutors.listeningDecorator(threadPool);
  36                 this.connectionSupplier = connectionSupplier;
  37         }
  38
  39         @Override
  40         public Executable<Optional<Peer>> fromFile(File file) {
  41                 this.file.set(file);
  42                 return this::execute;
  43         }
  44
  45         @Override
  46         public Executable<Optional<Peer>> fromURL(URL url) {
  47                 this.url.set(url);
  48                 return this::execute;
  49         }
  50
  51         @Override
  52         public Executable<Optional<Peer>> fromNodeRef(NodeRef nodeRef) {
  53                 this.nodeRef.set(nodeRef);
  54                 return this::execute;
  55         }
  56
  57         private ListenableFuture<Optional<Peer>> execute() {
  58                 return threadPool.submit(this::executeDialog);
  59         }
  60
  61         private Optional<Peer> executeDialog() throws IOException, ExecutionException, InterruptedException {
  62                 AddPeer addPeer;
  63                 if (file.get() != null) {
  64                         addPeer = new AddPeer(new RandomIdentifierGenerator().generate(), file.get().getPath());
  65                 } else if (url.get() != null) {
  66                         addPeer = new AddPeer(new RandomIdentifierGenerator().generate(), url.get());
  67                 } else {
  68                         addPeer = new AddPeer(new RandomIdentifierGenerator().generate(), nodeRef.get());
  69                 }
  70                 try (AddPeerDialog addPeerDialog = new AddPeerDialog()) {
  71                         return addPeerDialog.send(addPeer).get();
  72                 }
  73         }
  74
  75         private class AddPeerDialog extends FcpDialog<Optional<Peer>> {
  76
  77                 private final AtomicBoolean finished = new AtomicBoolean();
  78                 private final AtomicReference<Peer> peer = new AtomicReference<>();
  79
  80                 public AddPeerDialog() throws IOException {
  81                         super(threadPool, connectionSupplier.get());
  82                 }
  83
  84                 @Override
  85                 protected boolean isFinished() {
  86                         return finished.get();
  87                 }
  88
  89                 @Override
  90                 protected Optional<Peer> getResult() {
  91                         return Optional.ofNullable(peer.get());
  92                 }
  93
  94                 @Override
  95                 protected void consumePeer(Peer peer) {
  96                         this.peer.set(peer);
  97                         finished.set(true);
  98                 }
  99
 100                 @Override
 101                 protected void consumeProtocolError(ProtocolError protocolError) {
 102                         finished.set(true);
 103                 }
 104
 105         }
 106
 107 }