src/main/java/net/pterodactylus/fcp/quelaton/GetPluginInfoCommandImpl.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 import java.util.function.Supplier;
  10
  11 import net.pterodactylus.fcp.GetPluginInfo;
  12 import net.pterodactylus.fcp.PluginInfo;
  13 import net.pterodactylus.fcp.ProtocolError;
  14
  15 import com.google.common.util.concurrent.ListenableFuture;
  16 import com.google.common.util.concurrent.ListeningExecutorService;
  17 import com.google.common.util.concurrent.MoreExecutors;
  18
  19 /**
  20  * Default {@link GetPluginInfoCommand} implementation based on {@link FcpDialog}.
  21  *
  22  * @author <a href="mailto:bombe@freenetproject.org">David ‘Bombe’ Roden</a>
  23  */
  24 public class GetPluginInfoCommandImpl implements GetPluginInfoCommand {
  25
  26         private final ListeningExecutorService threadPool;
  27         private final ConnectionSupplier connectionSupplier;
  28         private final GetPluginInfo getPluginInfo;
  29
  30         public GetPluginInfoCommandImpl(ExecutorService threadPool, ConnectionSupplier connectionSupplier, Supplier<String> identifierGenerator) {
  31                 this.threadPool = MoreExecutors.listeningDecorator(threadPool);
  32                 this.connectionSupplier = connectionSupplier;
  33                 getPluginInfo = new GetPluginInfo(identifierGenerator.get());
  34         }
  35
  36         @Override
  37         public GetPluginInfoCommand detailed() {
  38                 getPluginInfo.setDetailed(true);
  39                 return this;
  40         }
  41
  42         @Override
  43         public Executable<Optional<PluginInfo>> plugin(String pluginName) {
  44                 getPluginInfo.setPluginName(pluginName);
  45                 return this::execute;
  46         }
  47
  48         private ListenableFuture<Optional<PluginInfo>> execute() {
  49                 return threadPool.submit(this::executeDialog);
  50         }
  51
  52         private Optional<PluginInfo> executeDialog() throws IOException, ExecutionException, InterruptedException {
  53                 try (GetPluginInfoDialog getPluginInfoDialog = new GetPluginInfoDialog()) {
  54                         return getPluginInfoDialog.send(getPluginInfo).get();
  55                 }
  56         }
  57
  58         private class GetPluginInfoDialog extends FcpDialog<Optional<PluginInfo>> {
  59
  60                 private final AtomicBoolean finished = new AtomicBoolean();
  61                 private final AtomicReference<PluginInfo> pluginInfo = new AtomicReference<>();
  62
  63                 public GetPluginInfoDialog() throws IOException {
  64                         super(threadPool, connectionSupplier.get());
  65                 }
  66
  67                 @Override
  68                 protected boolean isFinished() {
  69                         return finished.get();
  70                 }
  71
  72                 @Override
  73                 protected Optional<PluginInfo> getResult() {
  74                         return Optional.ofNullable(pluginInfo.get());
  75                 }
  76
  77                 @Override
  78                 protected void consumePluginInfo(PluginInfo pluginInfo) {
  79                         this.pluginInfo.set(pluginInfo);
  80                         finished.set(true);
  81                 }
  82
  83                 @Override
  84                 protected void consumeProtocolError(ProtocolError protocolError) {
  85                         finished.set(true);
  86                 }
  87
  88         }
  89
  90 }