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