예제 #1
0
// Metadata sends given metadata request to kafka node and returns related
// metadata response.
// Calling this method on closed connection will always return ErrClosed.
func (c *connection) Metadata(req *proto.MetadataReq) (*proto.MetadataResp, error) {
	var ok bool
	if req.CorrelationID, ok = <-c.nextID; !ok {
		return nil, c.stopErr
	}

	if _, err := req.WriteTo(c.conn); err != nil {
		return nil, err
	}
	b, ok := <-c.respc[req.CorrelationID]
	if !ok {
		return nil, c.stopErr
	}
	return proto.ReadMetadataResp(bytes.NewReader(b))
}
예제 #2
0
파일: connection.go 프로젝트: dmage/kafka
// Metadata sends given metadata request to kafka node and returns related
// metadata response.
// Calling this method on closed connection will always return ErrClosed.
func (c *connection) Metadata(req *proto.MetadataReq) (*proto.MetadataResp, error) {
	var ok bool
	if req.CorrelationID, ok = <-c.nextID; !ok {
		return nil, c.stopErr
	}

	respc, err := c.respWaiter(req.CorrelationID)
	if err != nil {
		return nil, fmt.Errorf("wait for response: %s", err)
	}

	if _, err := req.WriteTo(c.rw); err != nil {
		c.releaseWaiter(req.CorrelationID)
		return nil, err
	}
	b, ok := <-respc
	if !ok {
		return nil, c.stopErr
	}
	return proto.ReadMetadataResp(bytes.NewReader(b))
}