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