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