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

   1 package net.pterodactylus.fcp.quelaton;
   2
   3 import java.io.IOException;
   4 import java.util.concurrent.ExecutorService;
   5 import java.util.concurrent.atomic.AtomicReference;
   6
   7 import net.pterodactylus.fcp.GetNode;
   8 import net.pterodactylus.fcp.NodeData;
   9
  10 import com.google.common.util.concurrent.ListenableFuture;
  11 import com.google.common.util.concurrent.ListeningExecutorService;
  12 import com.google.common.util.concurrent.MoreExecutors;
  13
  14 /**
  15  * Default {@link GetNodeCommandImpl} implementation based on {@link FcpReplySequence}.
  16  *
  17  * @author <a href="mailto:bombe@freenetproject.org">David ‘Bombe’ Roden</a>
  18  */
  19 public class GetNodeCommandImpl implements GetNodeCommand {
  20
  21         private final ListeningExecutorService threadPool;
  22         private final ConnectionSupplier connectionSupplier;
  23
  24         public GetNodeCommandImpl(ExecutorService threadPool, ConnectionSupplier connectionSupplier) {
  25                 this.threadPool = MoreExecutors.listeningDecorator(threadPool);
  26                 this.connectionSupplier = connectionSupplier;
  27         }
  28
  29         @Override
  30         public ListenableFuture<NodeData> execute() {
  31                 GetNode getNode = new GetNode(new RandomIdentifierGenerator().generate(), false, false, false);
  32                 return threadPool.submit(() -> new GetNodeReplySequence().send(getNode).get());
  33         }
  34
  35         private class GetNodeReplySequence extends FcpReplySequence<NodeData> {
  36
  37                 private final AtomicReference<NodeData> nodeData = new AtomicReference<>();
  38
  39                 public GetNodeReplySequence() throws IOException {
  40                         super(threadPool, connectionSupplier.get());
  41                 }
  42
  43                 @Override
  44                 protected boolean isFinished() {
  45                         return nodeData.get() != null;
  46                 }
  47
  48                 @Override
  49                 protected NodeData getResult() {
  50                         return nodeData.get();
  51                 }
  52
  53                 @Override
  54                 protected void consumeNodeData(NodeData nodeData) {
  55                         this.nodeData.set(nodeData);
  56                 }
  57
  58         }
  59
  60 }