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.

   * 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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    assertEquals(3, count);
  }
  
  @Test
  public void testProtocolWithDocs() throws IOException {
    Protocol protocol = TestProtocolParsing.getSimpleProtocol();
    Collection<OutputFile> out = new SpecificCompiler(protocol).compile();
    assertEquals(5, out.size());
    int count = 0;
    for (OutputFile o : out) {
      if (o.path.endsWith("Simple.java")) {

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      this.expectedOut = expectedOut;
    }


    private String generate() throws Exception {
      Idl parser = new Idl(in);
      Protocol p = parser.CompilationUnit();
      return p.toString(true);
    }

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   */
  public static void main(String[] args) throws Exception {
    if (args.length == 0) {
      args = new String[] { "7002", "7003" };
    }
    Protocol protocol = Protocol.parse("{\"protocol\": \"sleepy\", "
        + "\"messages\": { \"sleep\": {"
        + "   \"request\": [{\"name\": \"millis\", \"type\": \"long\"}," +
          "{\"name\": \"data\", \"type\": \"bytes\"}], "
        + "   \"response\": \"null\"} } }");
    Log.info("Using protocol: " + protocol.toString());
    Responder r = new SleepyResponder(protocol);
    StatsPlugin p = new StatsPlugin();
    r.addRPCPlugin(p);


    // Start Avro server
    HttpServer avroServer = new HttpServer(r, Integer.parseInt(args[0]));
    avroServer.start();


    StatsServer ss = new StatsServer(p, 8080);
    
    HttpTransceiver trans = new HttpTransceiver(
        new URL("http://localhost:" + Integer.parseInt(args[0])));
    GenericRequestor req = new GenericRequestor(protocol, trans); 


    while(true) {
      Thread.sleep(1000);
      GenericRecord params = new GenericData.Record(protocol.getMessages().get(
        "sleep").getRequest());
      Random rand = new Random();
      params.put("millis", Math.abs(rand.nextLong()) % 1000);
      int payloadSize = Math.abs(rand.nextInt()) % 10000;
      byte[] payload = new byte[payloadSize];

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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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/**
 * The input to Idl is a CompilationUnit, which is currently
 * just a single Protocol.
 */
  final public Protocol CompilationUnit() throws ParseException {
  Protocol p;
    p = ProtocolDeclaration();
    switch ((jj_ntk==-1)?jj_ntk():jj_ntk) {
    case 65:
      jj_consume_token(65);
      break;

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    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_3:
    while (true) {
      switch ((jj_ntk==-1)?jj_ntk():jj_ntk) {
      case AT:
        ;
        break;
      default:
        jj_la1[5] = jj_gen;
        break label_3;
      }
      SchemaProperty(props);
    }
    if (props.containsKey("namespace"))
      namespace = getTextProp("namespace", props, token);
    jj_consume_token(PROTOCOL);
    name = Identifier();
   getDoc();                                      // consume doc
   p = new Protocol(name, namespace);
    ProtocolBody(p);
   {if (true) return p;}
    throw new Error("Missing return statement in function");
  }

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  }


  final public void ProtocolBody(Protocol p) throws ParseException {
  Schema schema;
  Message message;
  Protocol importProtocol;
    jj_consume_token(LBRACE);
    label_5:
    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[7] = jj_gen;
        break label_5;
      }
      switch ((jj_ntk==-1)?jj_ntk():jj_ntk) {
      case ENUM:
      case ERROR:
      case FIXED:
      case RECORD:
      case AT:
        schema = NamedSchemaDeclaration();
        break;
      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[8] = 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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/**
 * The input to Idl is a CompilationUnit, which is currently
 * just a single Protocol.
 */
  final public Protocol CompilationUnit() throws ParseException {
  Protocol p;
    p = ProtocolDeclaration();
    switch ((jj_ntk==-1)?jj_ntk():jj_ntk) {
    case 65:
      jj_consume_token(65);
      break;

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