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 import java.util.function.Supplier;
  10
  11 import net.pterodactylus.fcp.PluginInfo;
  12 import net.pterodactylus.fcp.ProtocolError;
  13 import net.pterodactylus.fcp.ReloadPlugin;
  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 ReloadPluginCommand} implementation based on {@link FcpDialog}.
  21  *
  22  * @author <a href="mailto:bombe@freenetproject.org">David ‘Bombe’ Roden</a>
  23  */
  24 public class ReloadPluginCommandImpl implements ReloadPluginCommand {
  25
  26         private final ListeningExecutorService threadPool;
  27         private final ConnectionSupplier connectionSupplier;
  28         private final ReloadPlugin reloadPlugin;
  29
  30         public ReloadPluginCommandImpl(ExecutorService threadPool, ConnectionSupplier connectionSupplier, Supplier<String> identifierGenerator) {
  31                 this.threadPool = MoreExecutors.listeningDecorator(threadPool);
  32                 this.connectionSupplier = connectionSupplier;
  33                 reloadPlugin = new ReloadPlugin(identifierGenerator.get());
  34         }
  35
  36         @Override
  37         public ReloadPluginCommand waitFor(int milliseconds) {
  38                 reloadPlugin.setMaxWaitTime(milliseconds);
  39                 return this;
  40         }
  41
  42         @Override
  43         public ReloadPluginCommand purge() {
  44                 reloadPlugin.setPurge(true);
  45                 return this;
  46         }
  47
  48         @Override
  49         public ReloadPluginCommand addToConfig() {
  50                 reloadPlugin.setStore(true);
  51                 return this;
  52         }
  53
  54         @Override
  55         public Executable<Optional<PluginInfo>> plugin(String pluginClassName) {
  56                 reloadPlugin.setPluginName(pluginClassName);
  57                 return this::execute;
  58         }
  59
  60         private ListenableFuture<Optional<PluginInfo>> execute() {
  61                 return threadPool.submit(this::executeDialog);
  62         }
  63
  64         private Optional<PluginInfo> executeDialog() throws IOException, ExecutionException, InterruptedException {
  65                 try (ReloadPluginDialog reloadPluginDialog = new ReloadPluginDialog()) {
  66                         return reloadPluginDialog.send(reloadPlugin).get();
  67                 }
  68         }
  69
  70         private class ReloadPluginDialog extends FcpDialog<Optional<PluginInfo>> {
  71
  72                 private final AtomicBoolean finished = new AtomicBoolean();
  73                 private final AtomicReference<PluginInfo> pluginInfo = new AtomicReference<>();
  74
  75                 public ReloadPluginDialog() throws IOException {
  76                         super(threadPool, connectionSupplier.get());
  77                 }
  78
  79                 @Override
  80                 protected boolean isFinished() {
  81                         return finished.get();
  82                 }
  83
  84                 @Override
  85                 protected Optional<PluginInfo> getResult() {
  86                         return Optional.ofNullable(pluginInfo.get());
  87                 }
  88
  89                 @Override
  90                 protected void consumePluginInfo(PluginInfo pluginInfo) {
  91                         this.pluginInfo.set(pluginInfo);
  92                         finished.set(true);
  93                 }
  94
  95                 @Override
  96                 protected void consumeProtocolError(ProtocolError protocolError) {
  97                         finished.set(true);
  98                 }
  99
 100         }
 101
 102 }