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 import java.util.function.Supplier;
  18
  19 import net.pterodactylus.fcp.ClientPut;
  20 import net.pterodactylus.fcp.FcpMessage;
  21 import net.pterodactylus.fcp.Key;
  22 import net.pterodactylus.fcp.ProtocolError;
  23 import net.pterodactylus.fcp.PutFailed;
  24 import net.pterodactylus.fcp.PutSuccessful;
  25 import net.pterodactylus.fcp.TestDDAComplete;
  26 import net.pterodactylus.fcp.TestDDAReply;
  27 import net.pterodactylus.fcp.TestDDARequest;
  28 import net.pterodactylus.fcp.TestDDAResponse;
  29 import net.pterodactylus.fcp.URIGenerated;
  30 import net.pterodactylus.fcp.UploadFrom;
  31
  32 import com.google.common.util.concurrent.ListenableFuture;
  33 import com.google.common.util.concurrent.ListeningExecutorService;
  34 import com.google.common.util.concurrent.MoreExecutors;
  35
  36 /**
  37  * Default {@link ClientPutCommand} implemented based on {@link FcpDialog}.
  38  *
  39  * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
  40  */
  41 class ClientPutCommandImpl implements ClientPutCommand {
  42
  43         private final ListeningExecutorService threadPool;
  44         private final ConnectionSupplier connectionSupplier;
  45         private final Supplier<String> identifierGenerator;
  46         private final AtomicReference<String> redirectUri = new AtomicReference<>();
  47         private final AtomicReference<File> file = new AtomicReference<>();
  48         private final AtomicReference<InputStream> payload = new AtomicReference<>();
  49         private final AtomicLong length = new AtomicLong();
  50         private final AtomicReference<String> targetFilename = new AtomicReference<>();
  51         private final List<Consumer<String>> keyGenerateds = new CopyOnWriteArrayList<>();
  52
  53         public ClientPutCommandImpl(ExecutorService threadPool, ConnectionSupplier connectionSupplier, Supplier<String> identifierGenerator) {
  54                 this.threadPool = MoreExecutors.listeningDecorator(threadPool);
  55                 this.connectionSupplier = connectionSupplier;
  56                 this.identifierGenerator = identifierGenerator;
  57         }
  58
  59         @Override
  60         public ClientPutCommand onKeyGenerated(Consumer<String> keyGenerated) {
  61                 keyGenerateds.add(keyGenerated);
  62                 return this;
  63         }
  64
  65         @Override
  66         public ClientPutCommand named(String targetFilename) {
  67                 this.targetFilename.set(targetFilename);
  68                 return this;
  69         }
  70
  71         @Override
  72         public WithUri redirectTo(String uri) {
  73                 this.redirectUri.set(Objects.requireNonNull(uri, "uri must not be null"));
  74                 return this::key;
  75         }
  76
  77         @Override
  78         public WithUri from(File file) {
  79                 this.file.set(Objects.requireNonNull(file, "file must not be null"));
  80                 return this::key;
  81         }
  82
  83         @Override
  84         public WithLength from(InputStream inputStream) {
  85                 payload.set(Objects.requireNonNull(inputStream, "inputStream must not be null"));
  86                 return this::length;
  87         }
  88
  89         private WithUri length(long length) {
  90                 this.length.set(length);
  91                 return this::key;
  92         }
  93
  94         private Executable<Optional<Key>> key(String uri) {
  95                 return () -> threadPool.submit(() -> execute(uri));
  96         }
  97
  98         private Optional<Key> execute(String uri) throws InterruptedException, ExecutionException, IOException {
  99                 ClientPut clientPut = createClientPutCommand(uri, identifierGenerator.get());
 100                 try (ClientPutDialog clientPutDialog = new ClientPutDialog()) {
 101                         return clientPutDialog.send(clientPut).get();
 102                 }
 103         }
 104
 105         private ClientPut createClientPutCommand(String uri, String identifier) {
 106                 ClientPut clientPut;
 107                 if (file.get() != null) {
 108                         clientPut = createClientPutFromDisk(uri, identifier, file.get());
 109                 } else if (redirectUri.get() != null) {
 110                         clientPut = createClientPutRedirect(uri, identifier, redirectUri.get());
 111                 } else {
 112                         clientPut = createClientPutDirect(uri, identifier, length.get(), payload.get());
 113                 }
 114                 if (targetFilename.get() != null) {
 115                         clientPut.setTargetFilename(targetFilename.get());
 116                 }
 117                 return clientPut;
 118         }
 119
 120         private ClientPut createClientPutFromDisk(String uri, String identifier, File file) {
 121                 ClientPut clientPut = new ClientPut(uri, identifier, UploadFrom.disk);
 122                 clientPut.setFilename(file.getAbsolutePath());
 123                 return clientPut;
 124         }
 125
 126         private ClientPut createClientPutRedirect(String uri, String identifier, String redirectUri) {
 127                 ClientPut clientPut = new ClientPut(uri, identifier, UploadFrom.redirect);
 128                 clientPut.setTargetURI(redirectUri);
 129                 return clientPut;
 130         }
 131
 132         private ClientPut createClientPutDirect(String uri, String identifier, long length, InputStream payload) {
 133                 ClientPut clientPut = new ClientPut(uri, identifier, UploadFrom.direct);
 134                 clientPut.setDataLength(length);
 135                 clientPut.setPayloadInputStream(payload);
 136                 return clientPut;
 137         }
 138
 139         private class ClientPutDialog extends FcpDialog<Optional<Key>> {
 140
 141                 private final AtomicReference<FcpMessage> originalClientPut = new AtomicReference<>();
 142                 private final AtomicReference<String> directory = new AtomicReference<>();
 143                 private final AtomicReference<Key> finalKey = new AtomicReference<>();
 144                 private final AtomicBoolean putFinished = new AtomicBoolean();
 145
 146                 public ClientPutDialog() throws IOException {
 147                         super(ClientPutCommandImpl.this.threadPool, ClientPutCommandImpl.this.connectionSupplier.get());
 148                 }
 149
 150                 @Override
 151                 protected boolean isFinished() {
 152                         return putFinished.get();
 153                 }
 154
 155                 @Override
 156                 protected Optional<Key> getResult() {
 157                         return Optional.ofNullable(finalKey.get());
 158                 }
 159
 160                 @Override
 161                 public ListenableFuture<Optional<Key>> send(FcpMessage fcpMessage) throws IOException {
 162                         originalClientPut.set(fcpMessage);
 163                         String filename = fcpMessage.getField("Filename");
 164                         if (filename != null) {
 165                                 directory.set(new File(filename).getParent());
 166                         }
 167                         return super.send(fcpMessage);
 168                 }
 169
 170                 @Override
 171                 protected void consumeURIGenerated(URIGenerated uriGenerated) {
 172                         for (Consumer<String> keyGenerated : keyGenerateds) {
 173                                 keyGenerated.accept(uriGenerated.getURI());
 174                         }
 175                 }
 176
 177                 @Override
 178                 protected void consumePutSuccessful(PutSuccessful putSuccessful) {
 179                         finalKey.set(new Key(putSuccessful.getURI()));
 180                         putFinished.set(true);
 181                 }
 182
 183                 @Override
 184                 protected void consumePutFailed(PutFailed putFailed) {
 185                         putFinished.set(true);
 186                 }
 187
 188                 @Override
 189                 protected void consumeProtocolError(ProtocolError protocolError) {
 190                         if (protocolError.getCode() == 25) {
 191                                 setIdentifier(directory.get());
 192                                 sendMessage(new TestDDARequest(directory.get(), true, false));
 193                         } else {
 194                                 putFinished.set(true);
 195                         }
 196                 }
 197
 198                 @Override
 199                 protected void consumeTestDDAReply(TestDDAReply testDDAReply) {
 200                         try {
 201                                 String readContent = Files.readAllLines(new File(testDDAReply.getReadFilename()).toPath()).get(0);
 202                                 sendMessage(new TestDDAResponse(directory.get(), readContent));
 203                         } catch (IOException e) {
 204                                 sendMessage(new TestDDAResponse(directory.get(), "failed-to-read"));
 205                         }
 206                 }
 207
 208                 @Override
 209                 protected void consumeTestDDAComplete(TestDDAComplete testDDAComplete) {
 210                         setIdentifier(originalClientPut.get().getField("Identifier"));
 211                         sendMessage(originalClientPut.get());
 212                 }
 213
 214         }
 215
 216 }