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|
package kong
import (
"context"
"encoding/json"
"errors"
"fmt"
)
// UpstreamService handles Upstreams in Kong.
type UpstreamService service
// Create creates a Upstream in Kong.
// If an ID is specified, it will be used to
// create a upstream in Kong, otherwise an ID
// is auto-generated.
func (s *UpstreamService) Create(ctx context.Context,
upstream *Upstream) (*Upstream, error) {
queryPath := "/upstreams"
method := "POST"
if upstream.ID != nil {
queryPath = queryPath + "/" + *upstream.ID
method = "PUT"
}
req, err := s.client.NewRequest(method, queryPath, nil, upstream)
if err != nil {
return nil, err
}
var createdUpstream Upstream
_, err = s.client.Do(ctx, req, &createdUpstream)
if err != nil {
return nil, err
}
return &createdUpstream, nil
}
// Get fetches a Upstream in Kong.
func (s *UpstreamService) Get(ctx context.Context,
upstreamNameOrID *string) (*Upstream, error) {
if isEmptyString(upstreamNameOrID) {
return nil, errors.New("upstreamNameOrID cannot" +
" be nil for Get operation")
}
endpoint := fmt.Sprintf("/upstreams/%v", *upstreamNameOrID)
req, err := s.client.NewRequest("GET", endpoint, nil, nil)
if err != nil {
return nil, err
}
var upstream Upstream
_, err = s.client.Do(ctx, req, &upstream)
if err != nil {
return nil, err
}
return &upstream, nil
}
// Update updates a Upstream in Kong
func (s *UpstreamService) Update(ctx context.Context,
upstream *Upstream) (*Upstream, error) {
if isEmptyString(upstream.ID) {
return nil, errors.New("ID cannot be nil for Update operation")
}
endpoint := fmt.Sprintf("/upstreams/%v", *upstream.ID)
req, err := s.client.NewRequest("PATCH", endpoint, nil, upstream)
if err != nil {
return nil, err
}
var updatedUpstream Upstream
_, err = s.client.Do(ctx, req, &updatedUpstream)
if err != nil {
return nil, err
}
return &updatedUpstream, nil
}
// Delete deletes a Upstream in Kong
func (s *UpstreamService) Delete(ctx context.Context,
upstreamNameOrID *string) error {
if isEmptyString(upstreamNameOrID) {
return errors.New("upstreamNameOrID cannot be nil for Delete operation")
}
endpoint := fmt.Sprintf("/upstreams/%v", *upstreamNameOrID)
req, err := s.client.NewRequest("DELETE", endpoint, nil, nil)
if err != nil {
return err
}
_, err = s.client.Do(ctx, req, nil)
return err
}
// List fetches a list of Upstreams in Kong.
// opt can be used to control pagination.
func (s *UpstreamService) List(ctx context.Context,
opt *ListOpt) ([]*Upstream, *ListOpt, error) {
data, next, err := s.client.list(ctx, "/upstreams", opt)
if err != nil {
return nil, nil, err
}
var upstreams []*Upstream
for _, object := range data {
b, err := object.MarshalJSON()
if err != nil {
return nil, nil, err
}
var upstream Upstream
err = json.Unmarshal(b, &upstream)
if err != nil {
return nil, nil, err
}
upstreams = append(upstreams, &upstream)
}
return upstreams, next, nil
}
// ListAll fetches all Upstreams in Kong.
// This method can take a while if there
// a lot of Upstreams present.
func (s *UpstreamService) ListAll(ctx context.Context) ([]*Upstream, error) {
var upstreams, data []*Upstream
var err error
opt := &ListOpt{Size: pageSize}
for opt != nil {
data, opt, err = s.List(ctx, opt)
if err != nil {
return nil, err
}
upstreams = append(upstreams, data...)
}
return upstreams, nil
}
|
