コード例 #1
0
func (c *boltConn) ackFailure(failure messages.FailureMessage) error {
	log.Infof("Acknowledging Failure: %#v", failure)

	ack := messages.NewAckFailureMessage()
	err := encoding.NewEncoder(c, c.chunkSize).Encode(ack)
	if err != nil {
		return errors.Wrap(err, "An error occurred encoding ack failure message")
	}

	for {
		respInt, err := encoding.NewDecoder(c).Decode()
		if err != nil {
			return errors.Wrap(err, "An error occurred decoding ack failure message response")
		}

		switch resp := respInt.(type) {
		case messages.IgnoredMessage:
			log.Infof("Got ignored message when acking failure: %#v", resp)
			continue
		case messages.SuccessMessage:
			log.Infof("Got success message when acking failure: %#v", resp)
			return nil
		case messages.FailureMessage:
			log.Errorf("Got failure message when acking failure: %#v", resp)
			return c.reset()
		default:
			log.Errorf("Got unrecognized response from acking failure: %#v", resp)
			err := c.Close()
			if err != nil {
				log.Errorf("An error occurred closing the session: %s", err)
			}
			return errors.New("Got unrecognized response from acking failure: %#v. CLOSING SESSION!", resp)
		}
	}
}
コード例 #2
0
func (c *boltConn) initialize() error {

	// Handle recorder. If there is no conn string, assume we're playing back a recording.
	// If there is a recorder and a conn string, assume we're recording the connection
	// Else, just create the conn normally
	var err error
	if c.connStr == "" && c.driver != nil && c.driver.recorder != nil {
		c.conn = c.driver.recorder
	} else if c.driver != nil && c.driver.recorder != nil {
		c.driver.recorder.Conn, err = c.createConn()
		if err != nil {
			return err
		}
		c.conn = c.driver.recorder
	} else {
		c.conn, err = c.createConn()
		if err != nil {
			return err
		}
	}

	if err := c.handShake(); err != nil {
		if e := c.Close(); e != nil {
			log.Errorf("An error occurred closing connection: %s", e)
		}
		return err
	}

	respInt, err := c.sendInit()
	if err != nil {
		if e := c.Close(); e != nil {
			log.Errorf("An error occurred closing connection: %s", e)
		}
		return err
	}

	switch resp := respInt.(type) {
	case messages.SuccessMessage:
		log.Infof("Successfully initiated Bolt connection: %+v", resp)
		return nil
	default:
		log.Errorf("Got an unrecognized message when initializing connection :%+v", resp)
		if e := c.Close(); e != nil {
			log.Errorf("An error occurred closing connection: %s", e)
		}
		return errors.New("Unrecognized response from the server: %#v", resp)
	}
}
コード例 #3
0
// Columns returns the columns from the result
func (r *boltRows) Columns() []string {
	fieldsInt, ok := r.metadata["fields"]
	if !ok {
		return []string{}
	}

	fields, ok := fieldsInt.([]interface{})
	if !ok {
		log.Errorf("Unrecognized fields from success message: %#v", fieldsInt)
		return []string{}
	}

	fieldsStr := make([]string, len(fields))
	for i, f := range fields {
		if fieldsStr[i], ok = f.(string); !ok {
			log.Errorf("Unrecognized fields from success message: %#v", fieldsInt)
			return []string{}
		}
	}
	return fieldsStr
}
コード例 #4
0
func (c *boltConn) reset() error {
	log.Info("Resetting session")

	reset := messages.NewResetMessage()
	err := encoding.NewEncoder(c, c.chunkSize).Encode(reset)
	if err != nil {
		return errors.Wrap(err, "An error occurred encoding reset message")
	}

	for {
		respInt, err := encoding.NewDecoder(c).Decode()
		if err != nil {
			return errors.Wrap(err, "An error occurred decoding reset message response")
		}

		switch resp := respInt.(type) {
		case messages.IgnoredMessage:
			log.Infof("Got ignored message when resetting session: %#v", resp)
			continue
		case messages.SuccessMessage:
			log.Infof("Got success message when resetting session: %#v", resp)
			return nil
		case messages.FailureMessage:
			log.Errorf("Got failure message when resetting session: %#v", resp)
			err = c.Close()
			if err != nil {
				log.Errorf("An error occurred closing the session: %s", err)
			}
			return errors.New("Error resetting session: %#v. CLOSING SESSION!", resp)
		default:
			log.Errorf("Got unrecognized response from resetting session: %#v", resp)
			err = c.Close()
			if err != nil {
				log.Errorf("An error occurred closing the session: %s", err)
			}
			return errors.New("Got unrecognized response from resetting session: %#v. CLOSING SESSION!", resp)
		}
	}
}
コード例 #5
0
func (c *boltConn) handShake() error {

	numWritten, err := c.Write(handShake)
	if numWritten != 20 {
		log.Errorf("Couldn't write expected bytes for magic preamble + supported versions. Written: %d. Expected: 4", numWritten)
		if err != nil {
			err = errors.Wrap(err, "An error occurred writing magic preamble + supported versions")
		}
		return err
	}

	numRead, err := c.Read(c.serverVersion)
	if numRead != 4 {
		log.Errorf("Could not read server version response. Read %d bytes. Expected 4 bytes. Output: %s", numRead, c.serverVersion)
		if err != nil {
			err = errors.Wrap(err, "An error occurred reading server version")
		}
		return err
	} else if bytes.Equal(c.serverVersion, noVersionSupported) {
		return errors.New("Server responded with no supported version")
	}

	return nil
}
コード例 #6
0
func (c *boltConn) consume() (interface{}, error) {
	log.Info("Consuming response from bolt stream")

	respInt, err := encoding.NewDecoder(c).Decode()
	if err != nil {
		return respInt, err
	}

	if log.GetLevel() >= log.TraceLevel {
		log.Tracef("Consumed Response: %#v", respInt)
	}

	if failure, isFail := respInt.(messages.FailureMessage); isFail {
		log.Errorf("Got failure message: %#v", failure)
		err := c.ackFailure(failure)
		if err != nil {
			return nil, err
		}
		return failure, errors.New("Got failure message: %#v", failure)
	}

	return respInt, err
}