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// Copyright 2012-present Oliver Eilhard. All rights reserved.
// Use of this source code is governed by a MIT-license.
// See http://olivere.mit-license.org/license.txt for details.
package elastic
import (
"context"
"fmt"
"net/url"
"strings"
"github.com/olivere/elastic/uritemplates"
)
// TasksCancelService can cancel long-running tasks.
// It is supported as of Elasticsearch 2.3.0.
//
// See http://www.elastic.co/guide/en/elasticsearch/reference/5.2/tasks-cancel.html
// for details.
type TasksCancelService struct {
client *Client
pretty bool
taskId *int64
actions []string
nodeId []string
parentNode string
parentTask *int64
}
// NewTasksCancelService creates a new TasksCancelService.
func NewTasksCancelService(client *Client) *TasksCancelService {
return &TasksCancelService{
client: client,
actions: make([]string, 0),
nodeId: make([]string, 0),
}
}
// TaskId specifies the task to cancel. Set to -1 to cancel all tasks.
func (s *TasksCancelService) TaskId(taskId int64) *TasksCancelService {
s.taskId = &taskId
return s
}
// Actions is a list of actions that should be cancelled. Leave empty to cancel all.
func (s *TasksCancelService) Actions(actions []string) *TasksCancelService {
s.actions = actions
return s
}
// NodeId is a list of node IDs or names to limit the returned information;
// use `_local` to return information from the node you're connecting to,
// leave empty to get information from all nodes.
func (s *TasksCancelService) NodeId(nodeId []string) *TasksCancelService {
s.nodeId = nodeId
return s
}
// ParentNode specifies to cancel tasks with specified parent node.
func (s *TasksCancelService) ParentNode(parentNode string) *TasksCancelService {
s.parentNode = parentNode
return s
}
// ParentTask specifies to cancel tasks with specified parent task id.
// Set to -1 to cancel all.
func (s *TasksCancelService) ParentTask(parentTask int64) *TasksCancelService {
s.parentTask = &parentTask
return s
}
// Pretty indicates that the JSON response be indented and human readable.
func (s *TasksCancelService) Pretty(pretty bool) *TasksCancelService {
s.pretty = pretty
return s
}
// buildURL builds the URL for the operation.
func (s *TasksCancelService) buildURL() (string, url.Values, error) {
// Build URL
var err error
var path string
if s.taskId != nil {
path, err = uritemplates.Expand("/_tasks/{task_id}/_cancel", map[string]string{
"task_id": fmt.Sprintf("%d", *s.taskId),
})
} else {
path = "/_tasks/_cancel"
}
if err != nil {
return "", url.Values{}, err
}
// Add query string parameters
params := url.Values{}
if s.pretty {
params.Set("pretty", "true")
}
if len(s.actions) > 0 {
params.Set("actions", strings.Join(s.actions, ","))
}
if len(s.nodeId) > 0 {
params.Set("node_id", strings.Join(s.nodeId, ","))
}
if s.parentNode != "" {
params.Set("parent_node", s.parentNode)
}
if s.parentTask != nil {
params.Set("parent_task", fmt.Sprintf("%v", *s.parentTask))
}
return path, params, nil
}
// Validate checks if the operation is valid.
func (s *TasksCancelService) Validate() error {
return nil
}
// Do executes the operation.
func (s *TasksCancelService) Do(ctx context.Context) (*TasksListResponse, error) {
// Check pre-conditions
if err := s.Validate(); err != nil {
return nil, err
}
// Get URL for request
path, params, err := s.buildURL()
if err != nil {
return nil, err
}
// Get HTTP response
res, err := s.client.PerformRequest(ctx, PerformRequestOptions{
Method: "POST",
Path: path,
Params: params,
})
if err != nil {
return nil, err
}
// Return operation response
ret := new(TasksListResponse)
if err := s.client.decoder.Decode(res.Body, ret); err != nil {
return nil, err
}
return ret, nil
}
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