Esempio n. 1
0
func (c *Client) readResponse(conn *connection, rpcCall *call) error {
	// Read first 4 bytes to get total-length
	var totalLength int32 = -1
	var totalLengthBytes [4]byte
	if _, err := conn.con.Read(totalLengthBytes[0:4]); err != nil {
		log.Fatal("conn.con.Read(totalLengthBytes)", err)
		return err
	}

	if err := gohadoop.ConvertBytesToFixed(totalLengthBytes[0:4], &totalLength); err != nil {
		log.Fatal("gohadoop.ConvertBytesToFixed(totalLengthBytes, &totalLength)", err)
		return err
	}

	var responseBytes []byte = make([]byte, totalLength)
	if _, err := conn.con.Read(responseBytes); err != nil {
		log.Fatal("conn.con.Read(totalLengthBytes)", err)
		return err
	}

	// Parse RpcResponseHeaderProto
	rpcResponseHeaderProto := hadoop_common.RpcResponseHeaderProto{}
	off, err := readDelimited(responseBytes[0:totalLength], &rpcResponseHeaderProto)
	if err != nil {
		log.Fatal("readDelimited(responseBytes, rpcResponseHeaderProto)", err)
		return err
	}
	//log.Println("Received rpcResponseHeaderProto = ", rpcResponseHeaderProto)

	err = c.checkRpcHeader(&rpcResponseHeaderProto)
	if err != nil {
		log.Fatal("c.checkRpcHeader failed", err)
		return err
	}

	if *rpcResponseHeaderProto.Status == hadoop_common.RpcResponseHeaderProto_SUCCESS {
		// Parse RpcResponseWrapper
		_, err = readDelimited(responseBytes[off:], rpcCall.response)
	} else {
		log.Println("RPC failed with status: ", rpcResponseHeaderProto.Status.String())
		errorDetails := [4]string{rpcResponseHeaderProto.Status.String(), "ServerDidNotSetExceptionClassName", "ServerDidNotSetErrorMsg", "ServerDidNotSetErrorDetail"}
		if rpcResponseHeaderProto.ExceptionClassName != nil {
			errorDetails[0] = *rpcResponseHeaderProto.ExceptionClassName
		}
		if rpcResponseHeaderProto.ErrorMsg != nil {
			errorDetails[1] = *rpcResponseHeaderProto.ErrorMsg
		}
		if rpcResponseHeaderProto.ErrorDetail != nil {
			errorDetails[2] = rpcResponseHeaderProto.ErrorDetail.String()
		}
		err = errors.New(strings.Join(errorDetails[:], ":"))
	}
	return err
}
Esempio n. 2
0
func receiveSaslMessage(c *Client, conn *connection) (*hadoop_common.RpcSaslProto, error) {
	// Read first 4 bytes to get total-length
	var totalLength int32 = -1
	var totalLengthBytes [4]byte

	if _, err := conn.con.Read(totalLengthBytes[0:4]); err != nil {
		log.Fatal("conn.con.Read(totalLengthBytes)", err)
		return nil, err
	}
	if err := gohadoop.ConvertBytesToFixed(totalLengthBytes[0:4], &totalLength); err != nil {
		log.Fatal("gohadoop.ConvertBytesToFixed(totalLengthBytes, &totalLength)", err)
		return nil, err
	}

	var responseBytes []byte = make([]byte, totalLength)

	if _, err := conn.con.Read(responseBytes); err != nil {
		log.Fatal("conn.con.Read(totalLengthBytes)", err)
		return nil, err
	}

	// Parse RpcResponseHeaderProto
	rpcResponseHeaderProto := hadoop_common.RpcResponseHeaderProto{}
	off, err := readDelimited(responseBytes[0:totalLength], &rpcResponseHeaderProto)
	if err != nil {
		log.Fatal("readDelimited(responseBytes, rpcResponseHeaderProto)", err)
		return nil, err
	}

	err = checkSaslRpcHeader(&rpcResponseHeaderProto)
	if err != nil {
		log.Fatal("checkSaslRpcHeader failed", err)
		return nil, err
	}

	var saslRpcMessage hadoop_common.RpcSaslProto

	if *rpcResponseHeaderProto.Status == hadoop_common.RpcResponseHeaderProto_SUCCESS {
		// Parse RpcResponseWrapper
		if _, err = readDelimited(responseBytes[off:], &saslRpcMessage); err != nil {
			log.Fatal("failed to read sasl response!")
			return nil, err
		} else {
			return &saslRpcMessage, nil
		}
	} else {
		log.Println("RPC failed with status: ", rpcResponseHeaderProto.Status.String())
		errorDetails := [4]string{rpcResponseHeaderProto.Status.String(), "ServerDidNotSetExceptionClassName", "ServerDidNotSetErrorMsg", "ServerDidNotSetErrorDetail"}
		if rpcResponseHeaderProto.ExceptionClassName != nil {
			errorDetails[0] = *rpcResponseHeaderProto.ExceptionClassName
		}
		if rpcResponseHeaderProto.ErrorMsg != nil {
			errorDetails[1] = *rpcResponseHeaderProto.ErrorMsg
		}
		if rpcResponseHeaderProto.ErrorDetail != nil {
			errorDetails[2] = rpcResponseHeaderProto.ErrorDetail.String()
		}
		err = errors.New(strings.Join(errorDetails[:], ":"))
		return nil, err
	}
}