src/main/java/net/pterodactylus/fcp/quelaton/GetConfigCommandImpl.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.AtomicReference;
   7
   8 import net.pterodactylus.fcp.ConfigData;
   9 import net.pterodactylus.fcp.GetConfig;
  10
  11 import com.google.common.util.concurrent.ListenableFuture;
  12 import com.google.common.util.concurrent.ListeningExecutorService;
  13 import com.google.common.util.concurrent.MoreExecutors;
  14
  15 /**
  16  * Default {@link GetConfigCommand} implementation based on {@link FcpDialog}.
  17  *
  18  * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
  19  */
  20 public class GetConfigCommandImpl implements GetConfigCommand {
  21
  22         private final ListeningExecutorService threadPool;
  23         private final ConnectionSupplier connectionSupplier;
  24
  25         public GetConfigCommandImpl(ExecutorService threadPool, ConnectionSupplier connectionSupplier) {
  26                 this.threadPool = MoreExecutors.listeningDecorator(threadPool);
  27                 this.connectionSupplier = connectionSupplier;
  28         }
  29
  30         @Override
  31         public ListenableFuture<ConfigData> execute() {
  32                 return threadPool.submit(this::executeDialog);
  33         }
  34
  35         private ConfigData executeDialog() throws IOException, ExecutionException, InterruptedException {
  36                 GetConfig getConfig = new GetConfig(new RandomIdentifierGenerator().generate());
  37                 try (GetConfigDialog getConfigDialog = new GetConfigDialog()) {
  38                         return getConfigDialog.send(getConfig).get();
  39                 }
  40         }
  41
  42         private class GetConfigDialog extends FcpDialog<ConfigData> {
  43
  44                 private final AtomicReference<ConfigData> configData = new AtomicReference<>();
  45
  46                 public GetConfigDialog() throws IOException {
  47                         super(threadPool, connectionSupplier.get());
  48                 }
  49
  50                 @Override
  51                 protected boolean isFinished() {
  52                         return configData.get() != null;
  53                 }
  54
  55                 @Override
  56                 protected ConfigData getResult() {
  57                         return configData.get();
  58                 }
  59
  60                 @Override
  61                 protected void consumeConfigData(ConfigData configData) {
  62                         this.configData.set(configData);
  63                 }
  64
  65         }
  66
  67 }