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.function.Supplier;
   8
   9 import net.pterodactylus.fcp.PluginInfo;
  10 import net.pterodactylus.fcp.ProtocolError;
  11 import net.pterodactylus.fcp.ReloadPlugin;
  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 ReloadPluginCommand} implementation based on {@link FcpDialog}.
  19  *
  20  * @author <a href="mailto:bombe@freenetproject.org">David ‘Bombe’ Roden</a>
  21  */
  22 public class ReloadPluginCommandImpl implements ReloadPluginCommand {
  23
  24         private final ListeningExecutorService threadPool;
  25         private final ConnectionSupplier connectionSupplier;
  26         private final ReloadPlugin reloadPlugin;
  27
  28         public ReloadPluginCommandImpl(ExecutorService threadPool, ConnectionSupplier connectionSupplier, Supplier<String> identifierGenerator) {
  29                 this.threadPool = MoreExecutors.listeningDecorator(threadPool);
  30                 this.connectionSupplier = connectionSupplier;
  31                 reloadPlugin = new ReloadPlugin(identifierGenerator.get());
  32         }
  33
  34         @Override
  35         public ReloadPluginCommand waitFor(int milliseconds) {
  36                 reloadPlugin.setMaxWaitTime(milliseconds);
  37                 return this;
  38         }
  39
  40         @Override
  41         public ReloadPluginCommand purge() {
  42                 reloadPlugin.setPurge(true);
  43                 return this;
  44         }
  45
  46         @Override
  47         public ReloadPluginCommand addToConfig() {
  48                 reloadPlugin.setStore(true);
  49                 return this;
  50         }
  51
  52         @Override
  53         public Executable<Optional<PluginInfo>> plugin(String pluginClassName) {
  54                 reloadPlugin.setPluginName(pluginClassName);
  55                 return this::execute;
  56         }
  57
  58         private ListenableFuture<Optional<PluginInfo>> execute() {
  59                 return threadPool.submit(this::executeDialog);
  60         }
  61
  62         private Optional<PluginInfo> executeDialog() throws IOException, ExecutionException, InterruptedException {
  63                 try (ReloadPluginDialog reloadPluginDialog = new ReloadPluginDialog()) {
  64                         return reloadPluginDialog.send(reloadPlugin).get();
  65                 }
  66         }
  67
  68         private class ReloadPluginDialog extends FcpDialog<Optional<PluginInfo>> {
  69
  70                 public ReloadPluginDialog() throws IOException {
  71                         super(threadPool, connectionSupplier.get(), Optional.<PluginInfo>empty());
  72                 }
  73
  74                 @Override
  75                 protected void consumePluginInfo(PluginInfo pluginInfo) {
  76                         setResult(Optional.ofNullable(pluginInfo));
  77                 }
  78
  79                 @Override
  80                 protected void consumeProtocolError(ProtocolError protocolError) {
  81                         finish();
  82                 }
  83
  84         }
  85
  86 }