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.ExecutionException;
   5 import java.util.concurrent.ExecutorService;
   6 import java.util.concurrent.atomic.AtomicBoolean;
   7 import java.util.concurrent.atomic.AtomicReference;
   8 import java.util.function.Supplier;
   9
  10 import net.pterodactylus.fcp.GetNode;
  11 import net.pterodactylus.fcp.NodeData;
  12
  13 import com.google.common.util.concurrent.ListenableFuture;
  14 import com.google.common.util.concurrent.ListeningExecutorService;
  15 import com.google.common.util.concurrent.MoreExecutors;
  16
  17 /**
  18  * Default {@link GetNodeCommandImpl} implementation based on {@link FcpDialog}.
  19  *
  20  * @author <a href="mailto:bombe@freenetproject.org">David ‘Bombe’ Roden</a>
  21  */
  22 public class GetNodeCommandImpl implements GetNodeCommand {
  23
  24         private final ListeningExecutorService threadPool;
  25         private final ConnectionSupplier connectionSupplier;
  26         private final Supplier<String> identifierGenerator;
  27         private final AtomicBoolean giveOpennetRef = new AtomicBoolean(false);
  28         private final AtomicBoolean includePrivate = new AtomicBoolean(false);
  29         private final AtomicBoolean includeVolatile = new AtomicBoolean(false);
  30
  31         public GetNodeCommandImpl(ExecutorService threadPool, ConnectionSupplier connectionSupplier, Supplier<String> identifierGenerator) {
  32                 this.threadPool = MoreExecutors.listeningDecorator(threadPool);
  33                 this.connectionSupplier = connectionSupplier;
  34                 this.identifierGenerator = identifierGenerator;
  35         }
  36
  37         @Override
  38         public GetNodeCommand opennetRef() {
  39                 giveOpennetRef.set(true);
  40                 return this;
  41         }
  42
  43         @Override
  44         public GetNodeCommand includePrivate() {
  45                 includePrivate.set(true);
  46                 return this;
  47         }
  48
  49         @Override
  50         public GetNodeCommand includeVolatile() {
  51                 includeVolatile.set(true);
  52                 return this;
  53         }
  54
  55         @Override
  56         public ListenableFuture<NodeData> execute() {
  57                 return threadPool.submit(this::executeDialog);
  58         }
  59
  60         private NodeData executeDialog() throws InterruptedException, ExecutionException, IOException {
  61                 GetNode getNode = new GetNode(identifierGenerator.get(), giveOpennetRef.get(),
  62                         includePrivate.get(), includeVolatile.get());
  63                 try (GetNodeDialog getNodeDialog = new GetNodeDialog()) {
  64                         return getNodeDialog.send(getNode).get();
  65                 }
  66         }
  67
  68         private class GetNodeDialog extends FcpDialog<NodeData> {
  69
  70                 private final AtomicReference<NodeData> nodeData = new AtomicReference<>();
  71
  72                 public GetNodeDialog() throws IOException {
  73                         super(threadPool, connectionSupplier.get());
  74                 }
  75
  76                 @Override
  77                 protected boolean isFinished() {
  78                         return nodeData.get() != null;
  79                 }
  80
  81                 @Override
  82                 protected NodeData getResult() {
  83                         return nodeData.get();
  84                 }
  85
  86                 @Override
  87                 protected void consumeNodeData(NodeData nodeData) {
  88                         this.nodeData.set(nodeData);
  89                 }
  90
  91         }
  92
  93 }