src/main/java/net/pterodactylus/fcp/quelaton/ClientPutCommandImpl.java

   1 package net.pterodactylus.fcp.quelaton;
   2
   3 import java.io.File;
   4 import java.io.IOException;
   5 import java.io.InputStream;
   6 import java.nio.file.Files;
   7 import java.util.List;
   8 import java.util.Objects;
   9 import java.util.Optional;
  10 import java.util.concurrent.CopyOnWriteArrayList;
  11 import java.util.concurrent.ExecutionException;
  12 import java.util.concurrent.ExecutorService;
  13 import java.util.concurrent.atomic.AtomicBoolean;
  14 import java.util.concurrent.atomic.AtomicLong;
  15 import java.util.concurrent.atomic.AtomicReference;
  16 import java.util.function.Consumer;
  17
  18 import net.pterodactylus.fcp.ClientPut;
  19 import net.pterodactylus.fcp.FcpMessage;
  20 import net.pterodactylus.fcp.Key;
  21 import net.pterodactylus.fcp.ProtocolError;
  22 import net.pterodactylus.fcp.PutFailed;
  23 import net.pterodactylus.fcp.PutSuccessful;
  24 import net.pterodactylus.fcp.TestDDAComplete;
  25 import net.pterodactylus.fcp.TestDDAReply;
  26 import net.pterodactylus.fcp.TestDDARequest;
  27 import net.pterodactylus.fcp.TestDDAResponse;
  28 import net.pterodactylus.fcp.URIGenerated;
  29 import net.pterodactylus.fcp.UploadFrom;
  30
  31 import com.google.common.util.concurrent.ListenableFuture;
  32 import com.google.common.util.concurrent.ListeningExecutorService;
  33 import com.google.common.util.concurrent.MoreExecutors;
  34
  35 /**
  36  * Default {@link ClientPutCommand} implemented based on {@link FcpDialog}.
  37  *
  38  * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
  39  */
  40 class ClientPutCommandImpl implements ClientPutCommand {
  41
  42         private final ListeningExecutorService threadPool;
  43         private final ConnectionSupplier connectionSupplier;
  44         private final AtomicReference<String> redirectUri = new AtomicReference<>();
  45         private final AtomicReference<File> file = new AtomicReference<>();
  46         private final AtomicReference<InputStream> payload = new AtomicReference<>();
  47         private final AtomicLong length = new AtomicLong();
  48         private final AtomicReference<String> targetFilename = new AtomicReference<>();
  49         private final List<Consumer<String>> keyGenerateds = new CopyOnWriteArrayList<>();
  50
  51         public ClientPutCommandImpl(ExecutorService threadPool, ConnectionSupplier connectionSupplier) {
  52                 this.threadPool = MoreExecutors.listeningDecorator(threadPool);
  53                 this.connectionSupplier = connectionSupplier;
  54         }
  55
  56         @Override
  57         public ClientPutCommand onKeyGenerated(Consumer<String> keyGenerated) {
  58                 keyGenerateds.add(keyGenerated);
  59                 return this;
  60         }
  61
  62         @Override
  63         public ClientPutCommand named(String targetFilename) {
  64                 this.targetFilename.set(targetFilename);
  65                 return this;
  66         }
  67
  68         @Override
  69         public WithUri redirectTo(String uri) {
  70                 this.redirectUri.set(Objects.requireNonNull(uri, "uri must not be null"));
  71                 return this::key;
  72         }
  73
  74         @Override
  75         public WithUri from(File file) {
  76                 this.file.set(Objects.requireNonNull(file, "file must not be null"));
  77                 return this::key;
  78         }
  79
  80         @Override
  81         public WithLength from(InputStream inputStream) {
  82                 payload.set(Objects.requireNonNull(inputStream, "inputStream must not be null"));
  83                 return this::length;
  84         }
  85
  86         private WithUri length(long length) {
  87                 this.length.set(length);
  88                 return this::key;
  89         }
  90
  91         private Executable<Optional<Key>> key(String uri) {
  92                 return () -> threadPool.submit(() -> execute(uri));
  93         }
  94
  95         private Optional<Key> execute(String uri) throws InterruptedException, ExecutionException, IOException {
  96                 String identifier = new RandomIdentifierGenerator().generate();
  97                 ClientPut clientPut = createClientPutCommand(uri, identifier);
  98                 try (ClientPutDialog clientPutDialog = new ClientPutDialog()) {
  99                         return clientPutDialog.send(clientPut).get();
 100                 }
 101         }
 102
 103         private ClientPut createClientPutCommand(String uri, String identifier) {
 104                 ClientPut clientPut;
 105                 if (file.get() != null) {
 106                         clientPut = createClientPutFromDisk(uri, identifier, file.get());
 107                 } else if (redirectUri.get() != null) {
 108                         clientPut = createClientPutRedirect(uri, identifier, redirectUri.get());
 109                 } else {
 110                         clientPut = createClientPutDirect(uri, identifier, length.get(), payload.get());
 111                 }
 112                 if (targetFilename.get() != null) {
 113                         clientPut.setTargetFilename(targetFilename.get());
 114                 }
 115                 return clientPut;
 116         }
 117
 118         private ClientPut createClientPutFromDisk(String uri, String identifier, File file) {
 119                 ClientPut clientPut = new ClientPut(uri, identifier, UploadFrom.disk);
 120                 clientPut.setFilename(file.getAbsolutePath());
 121                 return clientPut;
 122         }
 123
 124         private ClientPut createClientPutRedirect(String uri, String identifier, String redirectUri) {
 125                 ClientPut clientPut = new ClientPut(uri, identifier, UploadFrom.redirect);
 126                 clientPut.setTargetURI(redirectUri);
 127                 return clientPut;
 128         }
 129
 130         private ClientPut createClientPutDirect(String uri, String identifier, long length, InputStream payload) {
 131                 ClientPut clientPut = new ClientPut(uri, identifier, UploadFrom.direct);
 132                 clientPut.setDataLength(length);
 133                 clientPut.setPayloadInputStream(payload);
 134                 return clientPut;
 135         }
 136
 137         private class ClientPutDialog extends FcpDialog<Optional<Key>> {
 138
 139                 private final AtomicReference<FcpMessage> originalClientPut = new AtomicReference<>();
 140                 private final AtomicReference<String> directory = new AtomicReference<>();
 141                 private final AtomicReference<Key> finalKey = new AtomicReference<>();
 142                 private final AtomicBoolean putFinished = new AtomicBoolean();
 143
 144                 public ClientPutDialog() throws IOException {
 145                         super(ClientPutCommandImpl.this.threadPool, ClientPutCommandImpl.this.connectionSupplier.get());
 146                 }
 147
 148                 @Override
 149                 protected boolean isFinished() {
 150                         return putFinished.get();
 151                 }
 152
 153                 @Override
 154                 protected Optional<Key> getResult() {
 155                         return Optional.ofNullable(finalKey.get());
 156                 }
 157
 158                 @Override
 159                 public ListenableFuture<Optional<Key>> send(FcpMessage fcpMessage) throws IOException {
 160                         originalClientPut.set(fcpMessage);
 161                         String filename = fcpMessage.getField("Filename");
 162                         if (filename != null) {
 163                                 directory.set(new File(filename).getParent());
 164                         }
 165                         return super.send(fcpMessage);
 166                 }
 167
 168                 @Override
 169                 protected void consumeURIGenerated(URIGenerated uriGenerated) {
 170                         for (Consumer<String> keyGenerated : keyGenerateds) {
 171                                 keyGenerated.accept(uriGenerated.getURI());
 172                         }
 173                 }
 174
 175                 @Override
 176                 protected void consumePutSuccessful(PutSuccessful putSuccessful) {
 177                         finalKey.set(new Key(putSuccessful.getURI()));
 178                         putFinished.set(true);
 179                 }
 180
 181                 @Override
 182                 protected void consumePutFailed(PutFailed putFailed) {
 183                         putFinished.set(true);
 184                 }
 185
 186                 @Override
 187                 protected void consumeProtocolError(ProtocolError protocolError) {
 188                         if (protocolError.getCode() == 25) {
 189                                 setIdentifier(directory.get());
 190                                 sendMessage(new TestDDARequest(directory.get(), true, false));
 191                         } else {
 192                                 putFinished.set(true);
 193                         }
 194                 }
 195
 196                 @Override
 197                 protected void consumeTestDDAReply(TestDDAReply testDDAReply) {
 198                         try {
 199                                 String readContent = Files.readAllLines(new File(testDDAReply.getReadFilename()).toPath()).get(0);
 200                                 sendMessage(new TestDDAResponse(directory.get(), readContent));
 201                         } catch (IOException e) {
 202                                 sendMessage(new TestDDAResponse(directory.get(), "failed-to-read"));
 203                         }
 204                 }
 205
 206                 @Override
 207                 protected void consumeTestDDAComplete(TestDDAComplete testDDAComplete) {
 208                         setIdentifier(originalClientPut.get().getField("Identifier"));
 209                         sendMessage(originalClientPut.get());
 210                 }
 211
 212         }
 213
 214 }