Examples of org.apache.avro.Protocol

org.apache.avro.Protocol
A set of messages forming an application protocol.
A protocol consists of:
- a name for the protocol;
- an optional namespace, further qualifying the name;
- a list of types, or named {@link Schema schemas};
- a list of errors, or named {@link Schema schemas} for exceptions;
- a list of named messages, each of which specifies,
  - request, the parameter schemas;
  - one of either;
    - one-way
    or
    - response, the response schema;
    - errors, an optional list of potential error schema names.

    throw new Error("Missing return statement in function");
  }


  final public Protocol ProtocolDeclaration() throws ParseException {
  String name;
  Protocol p;
  Map<String, JsonNode> props = new LinkedHashMap<String, JsonNode>();
    label_2:
    while (true) {
      switch ((jj_ntk==-1)?jj_ntk():jj_ntk) {
      case AT:
        ;
        break;
      default:
        jj_la1[4] = jj_gen;
        break label_2;
      }
      SchemaProperty(props);
    }
    if (props.containsKey("namespace"))
      namespace = getTextProp("namespace", props, token);
    jj_consume_token(PROTOCOL);
    name = Identifier();
   p = new Protocol(name, getDoc(), namespace);
   for (String key : props.keySet())
     if ("namespace".equals(key)) {               // already handled: ignore
     } else {                                     // add all other props
       p.addProp(key, props.get(key));
     }
    ProtocolBody(p);
   {if (true) return p;}
    throw new Error("Missing return statement in function");
  }

View Full Code Here

  }


  final public void ProtocolBody(Protocol p) throws ParseException {
  Schema schema;
  Message message;
  Protocol importProtocol;
  Map<String, JsonNode> props = new LinkedHashMap<String, JsonNode>();
    jj_consume_token(LBRACE);
    label_4:
    while (true) {
      switch ((jj_ntk==-1)?jj_ntk():jj_ntk) {
      case ARRAY:
      case BOOLEAN:
      case DOUBLE:
      case ENUM:
      case ERROR:
      case FIXED:
      case FLOAT:
      case IMPORT:
      case INT:
      case LONG:
      case MAP:
      case BYTES:
      case STRING:
      case NULL:
      case RECORD:
      case UNION:
      case VOID:
      case IDENTIFIER:
      case AT:
      case TICK:
        ;
        break;
      default:
        jj_la1[6] = jj_gen;
        break label_4;
      }
      switch ((jj_ntk==-1)?jj_ntk():jj_ntk) {
      case IMPORT:
        jj_consume_token(IMPORT);
        switch ((jj_ntk==-1)?jj_ntk():jj_ntk) {
        case IDL:
        case PROTOCOL:
          switch ((jj_ntk==-1)?jj_ntk():jj_ntk) {
          case IDL:
            importProtocol = ImportIdl();
            break;
          case PROTOCOL:
            importProtocol = ImportProtocol();
            break;
          default:
            jj_la1[7] = jj_gen;
            jj_consume_token(-1);
            throw new ParseException();
          }
       for (Schema s : importProtocol.getTypes())
         names.put(s.getFullName(), s);
       p.getMessages().putAll(importProtocol.getMessages());
          break;
        case SCHEMA:
          schema = ImportSchema();
          break;
        default:

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  /** Create a proxy instance whose methods invoke RPCs. */
  @SuppressWarnings("unchecked")
  public static <T> T getClient(Class<T> iface, Transceiver transciever,
                                ReflectData reflectData) throws IOException {
    Protocol protocol = reflectData.getProtocol(iface);
    return (T)Proxy.newProxyInstance(iface.getClassLoader(), 
                                  new Class[] { iface },
                                  new ReflectRequestor(protocol, transciever));
  }

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  /** Create a proxy instance whose methods invoke RPCs. */
  @SuppressWarnings("unchecked")
  public static  <T> T getClient(Class<T> iface, Transceiver transciever,
                                 SpecificData specificData)
    throws IOException {
    Protocol protocol = specificData.getProtocol(iface);
    return (T)Proxy.newProxyInstance(iface.getClassLoader(),
                                  new Class[] { iface },
                                  new SpecificRequestor(protocol, transciever));
  }

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    RPCContext context = new RPCContext();
    List<ByteBuffer> payload = null;
    List<ByteBuffer> handshake = null;
    boolean wasConnected = connection != null && connection.isConnected();
    try {
      Protocol remote = handshake(in, out, connection);
      out.flush();
      if (remote == null)                        // handshake failed
        return bbo.getBufferList();
      handshake = bbo.getBufferList();
      
      // read request using remote protocol specification
      context.setRequestCallMeta(META_READER.read(null, in));
      String messageName = in.readString(null).toString();
      Message rm = remote.getMessages().get(messageName);
      if (rm == null)
        throw new AvroRuntimeException("No such remote message: "+messageName);
      Message m = getLocal().getMessages().get(messageName);
      if (m == null)
        throw new AvroRuntimeException("No message named "+messageName

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  private Protocol handshake(Decoder in, Encoder out, Transceiver connection)
    throws IOException {
    if (connection != null && connection.isConnected())
      return connection.getRemote();
    HandshakeRequest request = (HandshakeRequest)handshakeReader.read(null, in);
    Protocol remote = protocols.get(request.clientHash);
    if (remote == null && request.clientProtocol != null) {
      remote = Protocol.parse(request.clientProtocol.toString());
      protocols.put(request.clientHash, remote);
    }
    HandshakeResponse response = new HandshakeResponse();

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   * href="http://paranamer.codehaus.org/">Paranamer</a> is run over compiled
   * interface declarations, since Java 6 reflection does not provide access to
   * method parameter names.  See Avro's build.xml for an example. */
  @Override
  public Protocol getProtocol(Class iface) {
    Protocol protocol =
      new Protocol(iface.getSimpleName(),
                   iface.getPackage()==null?"":iface.getPackage().getName());
    Map<String,Schema> names = new LinkedHashMap<String,Schema>();
    Map<String,Message> messages = protocol.getMessages();
    for (Method method : iface.getMethods())
      if ((method.getModifiers() & Modifier.STATIC) == 0) {
        String name = method.getName();
        if (messages.containsKey(name))
          throw new AvroTypeException("Two methods with same name: "+name);
        messages.put(name, getMessage(method, protocol, names));
      }


    // reverse types, since they were defined in reference order
    List<Schema> types = new ArrayList<Schema>();
    types.addAll(names.values());
    Collections.reverse(types);
    protocol.setTypes(types);


    return protocol;
  }

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   * Generates Java interface and classes for a protocol.
   * @param src the source Avro protocol file
   * @param dest the directory to place generated files in
   */
  public static void compileProtocol(File src, File dest) throws IOException {
    Protocol protocol = Protocol.parse(src);
    SpecificCompiler compiler = new SpecificCompiler(protocol);
    compiler.compileToDestination(src, dest);
  }

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  @Override
  protected void doCompile(String filename, File sourceDirectory, File outputDirectory) throws IOException {
    Idl parser = new Idl(new File(sourceDirectory, filename));
    try {
      Protocol p = parser.CompilationUnit();
      String json = p.toString(true);
      Protocol protocol = Protocol.parse(json);
      SpecificCompiler compiler = new SpecificCompiler(protocol);
      compiler.compileToDestination(null, outputDirectory);
    } catch (ParseException e) {
      throw new IOException(e);
    }

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  private String[] testIncludes = new String[] { "**/*.avpr" };
  
  @Override
  protected void doCompile(String filename, File sourceDirectory, File outputDirectory) throws IOException {
    File src = new File(sourceDirectory, filename);
    Protocol protocol = Protocol.parse(src);
    SpecificCompiler compiler = new SpecificCompiler(protocol);
    compiler.setTemplateDir(templateDirectory);
    compiler.setStringType(StringType.valueOf(stringType));
    compiler.setFieldVisibility(getFieldVisibility());
    compiler.setCreateSetters(createSetters);

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