org.apache.hadoop.ipc.VersionedProtocol Java Examples

public Invocation(Method method, Object[] parameters) {
  this.methodName = method.getName();
  this.parameterClasses = method.getParameterTypes();
  this.parameters = parameters;
  rpcVersion = writableRpcVersion;
  if (method.getDeclaringClass().equals(VersionedProtocol.class)) {
    //VersionedProtocol is exempted from version check.
    clientVersion = 0;
    clientMethodsHash = 0;
  } else {
    this.clientVersion = RPC.getProtocolVersion(method.getDeclaringClass());
    this.clientMethodsHash = ProtocolSignature.getFingerprint(method
        .getDeclaringClass().getMethods());
  }
  this.declaringClassProtocolName = 
      RPC.getProtocolName(method.getDeclaringClass());
}
 

public Invocation(Method method, Object[] parameters) {
  this.methodName = method.getName();
  this.parameterClasses = method.getParameterTypes();
  this.parameters = parameters;
  rpcVersion = writableRpcVersion;
  if (method.getDeclaringClass().equals(VersionedProtocol.class)) {
    //VersionedProtocol is exempted from version check.
    clientVersion = 0;
    clientMethodsHash = 0;
  } else {
    this.clientVersion = RPC.getProtocolVersion(method.getDeclaringClass());
    this.clientMethodsHash = ProtocolSignature.getFingerprint(method
        .getDeclaringClass().getMethods());
  }
  this.declaringClassProtocolName = 
      RPC.getProtocolName(method.getDeclaringClass());
}
 

/**
 * This function tests the method signature fingerprint passed back from
 * name-node with MetaInfo is correct.
 */
@SuppressWarnings("unchecked")
public void testNameNodeFingerprintSent() throws IOException {
  InetSocketAddress addr = cluster.getNameNode().getNameNodeDNAddress();
  DFSClient client = new DFSClient(addr, cluster.getNameNode().getConf());

  client.namenode.create("/testNameNodeFingerprintSent.txt", FsPermission
      .getDefault(), client.getClientName(), true, (short)1, 65535L);

  
  Class<? extends VersionedProtocol> inter;
  try {
    inter = (Class<? extends VersionedProtocol>)Class.forName(ClientProtocol.class.getName());
  } catch (Exception e) {
    throw new IOException(e);
  }
  long serverVersion = ClientProtocol.versionID;
  int serverFpFromNn = ProtocolSignature.getFingerprint(ProtocolSignature.getProtocolSignature(
      0, serverVersion, inter).getMethods());
  
  LocatedBlockWithMetaInfo loc = client.namenode.addBlockAndFetchMetaInfo("/testNameNodeFingerprintSent.txt",
      client.getClientName(), null, 0L);
  
  int serverFp = loc.getMethodFingerPrint();
  TestCase.assertEquals(serverFpFromNn, serverFp);    

  FileSystem fs = cluster.getFileSystem();
  Path f = new Path("/testNameNodeFingerprintSent1.txt");
  DataOutputStream a_out = fs.create(f);
  a_out.writeBytes("something");
  a_out.close();
  
  LocatedBlocksWithMetaInfo locs = client.namenode.openAndFetchMetaInfo("/testNameNodeFingerprintSent.txt",
      0L, 0L);
  TestCase.assertEquals(locs.getMethodFingerPrint(), serverFp);    
}
 

@Override
public boolean implies(Permission permission) {
  if (permission instanceof ConnectionPermission) {
    ConnectionPermission that = (ConnectionPermission)permission;
    if (that.protocol.equals(VersionedProtocol.class)) {
      return true;
    }
    return this.protocol.equals(that.protocol);
  }
  return false;
}
 

@Override
public boolean implies(Permission permission) {
  if (permission instanceof ConnectionPermission) {
    ConnectionPermission that = (ConnectionPermission)permission;
    if (that.protocol.equals(VersionedProtocol.class)) {
      return true;
    }
    return this.protocol.equals(that.protocol);
  }
  return false;
}
 

/** 
 * Construct an RPC server.
 * @param protocolClass - the protocol being registered
 *     can be null for compatibility with old usage (see below for details)
 * @param protocolImpl the protocol impl that will be called
 * @param conf the configuration to use
 * @param bindAddress the address to bind on to listen for connection
 * @param port the port to listen for connections on
 * @param numHandlers the number of method handler threads to run
 * @param verbose whether each call should be logged
 */
public Server(Class<?> protocolClass, Object protocolImpl,
    Configuration conf, String bindAddress,  int port,
    int numHandlers, int numReaders, int queueSizePerHandler, 
    boolean verbose, SecretManager<? extends TokenIdentifier> secretManager,
    String portRangeConfig) 
    throws IOException {
  super(bindAddress, port, null, numHandlers, numReaders,
      queueSizePerHandler, conf,
      classNameBase(protocolImpl.getClass().getName()), secretManager,
      portRangeConfig);

  this.verbose = verbose;
  
  
  Class<?>[] protocols;
  if (protocolClass == null) { // derive protocol from impl
    /*
     * In order to remain compatible with the old usage where a single
     * target protocolImpl is suppled for all protocol interfaces, and
     * the protocolImpl is derived from the protocolClass(es) 
     * we register all interfaces extended by the protocolImpl
     */
    protocols = RPC.getProtocolInterfaces(protocolImpl.getClass());

  } else {
    if (!protocolClass.isAssignableFrom(protocolImpl.getClass())) {
      throw new IOException("protocolClass "+ protocolClass +
          " is not implemented by protocolImpl which is of class " +
          protocolImpl.getClass());
    }
    // register protocol class and its super interfaces
    registerProtocolAndImpl(RPC.RpcKind.RPC_WRITABLE, protocolClass, protocolImpl);
    protocols = RPC.getProtocolInterfaces(protocolClass);
  }
  for (Class<?> p : protocols) {
    if (!p.equals(VersionedProtocol.class)) {
      registerProtocolAndImpl(RPC.RpcKind.RPC_WRITABLE, p, protocolImpl);
    }
  }

}
 

/** 
 * Construct an RPC server.
 * @param protocolClass - the protocol being registered
 *     can be null for compatibility with old usage (see below for details)
 * @param protocolImpl the protocol impl that will be called
 * @param conf the configuration to use
 * @param bindAddress the address to bind on to listen for connection
 * @param port the port to listen for connections on
 * @param numHandlers the number of method handler threads to run
 * @param verbose whether each call should be logged
 */
public Server(Class<?> protocolClass, Object protocolImpl,
    Configuration conf, String bindAddress,  int port,
    int numHandlers, int numReaders, int queueSizePerHandler, 
    boolean verbose, SecretManager<? extends TokenIdentifier> secretManager,
    String portRangeConfig) 
    throws IOException {
  super(bindAddress, port, null, numHandlers, numReaders,
      queueSizePerHandler, conf,
      classNameBase(protocolImpl.getClass().getName()), secretManager,
      portRangeConfig);

  this.verbose = verbose;
  
  
  Class<?>[] protocols;
  if (protocolClass == null) { // derive protocol from impl
    /*
     * In order to remain compatible with the old usage where a single
     * target protocolImpl is suppled for all protocol interfaces, and
     * the protocolImpl is derived from the protocolClass(es) 
     * we register all interfaces extended by the protocolImpl
     */
    protocols = RPC.getProtocolInterfaces(protocolImpl.getClass());

  } else {
    if (!protocolClass.isAssignableFrom(protocolImpl.getClass())) {
      throw new IOException("protocolClass "+ protocolClass +
          " is not implemented by protocolImpl which is of class " +
          protocolImpl.getClass());
    }
    // register protocol class and its super interfaces
    registerProtocolAndImpl(RPC.RpcKind.RPC_WRITABLE, protocolClass, protocolImpl);
    protocols = RPC.getProtocolInterfaces(protocolClass);
  }
  for (Class<?> p : protocols) {
    if (!p.equals(VersionedProtocol.class)) {
      registerProtocolAndImpl(RPC.RpcKind.RPC_WRITABLE, p, protocolImpl);
    }
  }

}
 

public List<VersionedProtocol> getCreatedProxies() {
  return Collections.singletonList((VersionedProtocol)jobTracker);
}