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

   1 package net.pterodactylus.fcp.quelaton;
   2
   3 import java.io.IOException;
   4 import java.io.InputStream;
   5 import java.util.ArrayList;
   6 import java.util.List;
   7 import java.util.Optional;
   8 import java.util.concurrent.ExecutionException;
   9 import java.util.concurrent.ExecutorService;
  10 import java.util.function.Consumer;
  11 import java.util.function.Supplier;
  12
  13 import net.pterodactylus.fcp.AllData;
  14 import net.pterodactylus.fcp.ClientGet;
  15 import net.pterodactylus.fcp.FcpUtils.TempInputStream;
  16 import net.pterodactylus.fcp.GetFailed;
  17 import net.pterodactylus.fcp.Priority;
  18 import net.pterodactylus.fcp.ReturnType;
  19
  20 import com.google.common.util.concurrent.ListeningExecutorService;
  21 import com.google.common.util.concurrent.MoreExecutors;
  22
  23 /**
  24  * Implementation of the {@link ClientGetCommand}.
  25  *
  26  * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
  27  */
  28 class ClientGetCommandImpl implements ClientGetCommand {
  29
  30         private final ListeningExecutorService threadPool;
  31         private final ConnectionSupplier connectionSupplier;
  32         private final Supplier<String> identifierGenerator;
  33         private final List<Consumer<String>> onRedirects = new ArrayList<>();
  34
  35         private boolean ignoreDataStore;
  36         private boolean dataStoreOnly;
  37         private Long maxSize;
  38         private Priority priority;
  39         private boolean realTime;
  40         private boolean global;
  41
  42         public ClientGetCommandImpl(ExecutorService threadPool, ConnectionSupplier connectionSupplier, Supplier<String> identifierGenerator) {
  43                 this.threadPool = MoreExecutors.listeningDecorator(threadPool);
  44                 this.connectionSupplier = connectionSupplier;
  45                 this.identifierGenerator = identifierGenerator;
  46         }
  47
  48         @Override
  49         public ClientGetCommand onRedirect(Consumer<String> onRedirect) {
  50                 onRedirects.add(onRedirect);
  51                 return this;
  52         }
  53
  54         @Override
  55         public ClientGetCommand ignoreDataStore() {
  56                 ignoreDataStore = true;
  57                 return this;
  58         }
  59
  60         @Override
  61         public ClientGetCommand dataStoreOnly() {
  62                 dataStoreOnly = true;
  63                 return this;
  64         }
  65
  66         @Override
  67         public ClientGetCommand maxSize(long maxSize) {
  68                 this.maxSize = maxSize;
  69                 return this;
  70         }
  71
  72         @Override
  73         public ClientGetCommand priority(Priority priority) {
  74                 this.priority = priority;
  75                 return this;
  76         }
  77
  78         @Override
  79         public ClientGetCommand realTime() {
  80                 realTime = true;
  81                 return this;
  82         }
  83
  84         @Override
  85         public ClientGetCommand global() {
  86                 global = true;
  87                 return this;
  88         }
  89
  90         @Override
  91         public Executable<Optional<Data>> uri(String uri) {
  92                 return () -> threadPool.submit(() -> execute(uri));
  93         }
  94
  95         private Optional<Data> execute(String uri) throws InterruptedException, ExecutionException, IOException {
  96                 ClientGet clientGet = createClientGetCommand(identifierGenerator.get(), uri);
  97                 try (ClientGetDialog clientGetDialog = new ClientGetDialog()) {
  98                         return clientGetDialog.send(clientGet).get();
  99                 }
 100         }
 101
 102         private ClientGet createClientGetCommand(String identifier, String uri) {
 103                 ClientGet clientGet = new ClientGet(uri, identifier, ReturnType.direct);
 104                 if (ignoreDataStore) {
 105                         clientGet.setIgnoreDataStore(true);
 106                 }
 107                 if (dataStoreOnly) {
 108                         clientGet.setDataStoreOnly(true);
 109                 }
 110                 if (maxSize != null) {
 111                         clientGet.setMaxSize(maxSize);
 112                 }
 113                 if (priority != null) {
 114                         clientGet.setPriority(priority);
 115                 }
 116                 if (realTime) {
 117                         clientGet.setRealTimeFlag(true);
 118                 }
 119                 if (global) {
 120                         clientGet.setGlobal(true);
 121                 }
 122                 return clientGet;
 123         }
 124
 125         private class ClientGetDialog extends FcpDialog<Optional<Data>> {
 126
 127                 public ClientGetDialog() throws IOException {
 128                         super(ClientGetCommandImpl.this.threadPool, ClientGetCommandImpl.this.connectionSupplier.get(),
 129                                 Optional.<Data>empty());
 130                 }
 131
 132                 @Override
 133                 protected void consumeAllData(AllData allData) {
 134                         synchronized (this) {
 135                                 String contentType = allData.getContentType();
 136                                 long dataLength = allData.getDataLength();
 137                                 try {
 138                                         InputStream payload = new TempInputStream(allData.getPayloadInputStream(), dataLength);
 139                                         setResult(Optional.of(createData(contentType, dataLength, payload)));
 140                                 } catch (IOException e) {
 141                                         // TODO – logging
 142                                         finish();
 143                                 }
 144                         }
 145                 }
 146
 147                 private Data createData(String contentType, long dataLength, InputStream payload) {
 148                         return new Data() {
 149                                 @Override
 150                                 public String getMimeType() {
 151                                         return contentType;
 152                                 }
 153
 154                                 @Override
 155                                 public long size() {
 156                                         return dataLength;
 157                                 }
 158
 159                                 @Override
 160                                 public InputStream getInputStream() {
 161                                         return payload;
 162                                 }
 163                         };
 164                 }
 165
 166                 @Override
 167                 protected void consumeGetFailed(GetFailed getFailed) {
 168                         if (getFailed.getCode() == 27) {
 169                                 onRedirects.forEach(onRedirect -> onRedirect.accept(getFailed.getRedirectURI()));
 170                                 sendMessage(createClientGetCommand(getIdentifier(), getFailed.getRedirectURI()));
 171                         } else {
 172                                 finish();
 173                         }
 174                 }
 175
 176         }
 177
 178 }