Golang hyperdex_client_destroy_attrs示例

示例#1

文件： ops.go 项目： ZheYuan/HyperDex

// Generic operation that returns objects
func (client *Client) objOp(funcName, space, key string, conds []Condition) ObjectChannel {
	objCh := make(chan Object, CHANNEL_BUFFER_SIZE)
	var status C.enum_hyperdex_client_returncode
	var C_attrs *C.struct_hyperdex_client_attribute
	var C_attrs_sz C.size_t
	var C_attr_checks *C.struct_hyperdex_client_attribute_check
	var C_attr_checks_sz C.size_t
	var err error

	if conds != nil {
		C_attr_checks, C_attr_checks_sz, err = client.newCAttributeCheckList(conds)
		if err != nil {
			objCh <- Object{
				Err: err,
			}
			close(objCh)
			return objCh
		}
	}

	var req_id int64
	switch funcName {
	case "get":
		req_id = int64(C.hyperdex_client_get(client.ptr, C.CString(space),
			C.CString(key), C.size_t(bytesOf(key)),
			&status, &C_attrs, &C_attrs_sz))
	case "search":
		req_id = int64(C.hyperdex_client_search(client.ptr,
			C.CString(space), C_attr_checks, C_attr_checks_sz,
			&status, &C_attrs, &C_attrs_sz))
	}

	if req_id < 0 {
		objCh <- Object{Err: newInternalError(status,
			C.GoString(C.hyperdex_client_error_message(client.ptr)))}
		close(objCh)
		return objCh
	}

	req := request{
		id:     req_id,
		status: &status,
	}
	switch funcName {
	case "get":
		req.success = func() {
			attrs, err := client.newAttributeListFromC(C_attrs, C_attrs_sz)
			if err != nil {
				objCh <- Object{Err: err}
				close(objCh)
				return
			}
			objCh <- Object{Err: nil, Key: key, Attrs: attrs}
			close(objCh)
			if C_attrs_sz > 0 {
				C.hyperdex_client_destroy_attrs(C_attrs, C_attrs_sz)
			}
		}
		req.failure = objChannelFailureCallback(objCh)
	case "search":
		req.isIterator = true
		req.success = func() {
			// attrs, err := newAttributeListFromC(C_attrs, C_attrs_sz)
			attrs, err := client.newAttributeListFromC(C_attrs, C_attrs_sz)
			if err != nil {
				objCh <- Object{Err: err}
				close(objCh)
				return
			}

			if C_attrs_sz > 0 {
				C.hyperdex_client_destroy_attrs(C_attrs, C_attrs_sz)
			}
			objCh <- Object{Attrs: attrs}
		}
		req.failure = objChannelFailureCallback(objCh)
		req.complete = func() {
			close(objCh)
		}
	}

	client.requests = append(client.requests, req)
	return objCh
}

示例#2

文件： api.go 项目： Kangmo/HyperDex

func (client *Client) SortedSearch(space string, conds []Condition, sort_by string,
	limit int, maxmin int) ObjectChannel {

	objCh := make(chan Object, CHANNEL_BUFFER_SIZE)
	var status C.enum_hyperdex_client_returncode
	var C_attrs *C.struct_hyperdex_client_attribute
	var C_attrs_sz C.size_t
	var C_attr_checks *C.struct_hyperdex_client_attribute_check
	var C_attr_checks_sz C.size_t
	var err error

	if conds != nil {
		C_attr_checks, C_attr_checks_sz, err = client.newCAttributeCheckList(conds)
		if err != nil {
			objCh <- Object{
				Err: err,
			}
			close(objCh)
			return objCh
		}
	}

	req_id := int64(C.hyperdex_client_sorted_search(client.ptr,
		C.CString(space), C_attr_checks, C_attr_checks_sz,
		C.CString(sort_by), C.uint64_t(limit), C.int(maxmin),
		&status, &C_attrs, &C_attrs_sz))

	if req_id < 0 {
		objCh <- Object{Err: newInternalError(status,
			C.GoString(C.hyperdex_client_error_message(client.ptr)))}
		close(objCh)
		return objCh
	}

	req := request{
		id:         req_id,
		status:     &status,
		isIterator: true,
		success: func() {
			// attrs, err := newAttributeListFromC(C_attrs, C_attrs_sz)
			attrs, err := client.newAttributeListFromC(C_attrs, C_attrs_sz)
			if err != nil {
				objCh <- Object{Err: err}
				close(objCh)
				return
			}

			if C_attrs_sz > 0 {
				C.hyperdex_client_destroy_attrs(C_attrs, C_attrs_sz)
			}
			objCh <- Object{Attrs: attrs}
		},
		failure: objChannelFailureCallback(objCh),
		complete: func() {
			close(objCh)
		},
	}

	client.requests = append(client.requests, req)
	return objCh
}