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// Copyright 2012-2015 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 (
"encoding/json"
"fmt"
"net/url"
"strings"
"gopkg.in/olivere/elastic.v2/uritemplates"
)
// ClusterStateService returns the state of the cluster.
// It is documented at http://www.elasticsearch.org/guide/en/elasticsearch/reference/1.4/cluster-state.html.
type ClusterStateService struct {
client *Client
pretty bool
indices []string
metrics []string
local *bool
masterTimeout string
flatSettings *bool
}
// NewClusterStateService creates a new ClusterStateService.
func NewClusterStateService(client *Client) *ClusterStateService {
return &ClusterStateService{
client: client,
indices: make([]string, 0),
metrics: make([]string, 0),
}
}
// Index the name of the index. Use _all or an empty string to perform
// the operation on all indices.
func (s *ClusterStateService) Index(index string) *ClusterStateService {
s.indices = make([]string, 0)
s.indices = append(s.indices, index)
return s
}
// Indices is a list of index names. Use _all or an empty string to
// perform the operation on all indices.
func (s *ClusterStateService) Indices(indices ...string) *ClusterStateService {
s.indices = make([]string, 0)
s.indices = append(s.indices, indices...)
return s
}
// Metric limits the information returned to the specified metric.
// It can be one of: version, master_node, nodes, routing_table, metadata,
// blocks, or customs.
func (s *ClusterStateService) Metric(metric string) *ClusterStateService {
s.metrics = make([]string, 0)
s.metrics = append(s.metrics, metric)
return s
}
// Metrics limits the information returned to the specified metrics.
// It can be any of: version, master_node, nodes, routing_table, metadata,
// blocks, or customs.
func (s *ClusterStateService) Metrics(metrics ...string) *ClusterStateService {
s.metrics = make([]string, 0)
s.metrics = append(s.metrics, metrics...)
return s
}
// Local indicates whether to return local information. If it is true,
// we do not retrieve the state from master node (default: false).
func (s *ClusterStateService) Local(local bool) *ClusterStateService {
s.local = &local
return s
}
// MasterTimeout specifies the timeout for connection to master.
func (s *ClusterStateService) MasterTimeout(masterTimeout string) *ClusterStateService {
s.masterTimeout = masterTimeout
return s
}
// FlatSettings indicates whether to return settings in flat format (default: false).
func (s *ClusterStateService) FlatSettings(flatSettings bool) *ClusterStateService {
s.flatSettings = &flatSettings
return s
}
// buildURL builds the URL for the operation.
func (s *ClusterStateService) buildURL() (string, url.Values, error) {
// Build URL
metrics := strings.Join(s.metrics, ",")
if metrics == "" {
metrics = "_all"
}
indices := strings.Join(s.indices, ",")
if indices == "" {
indices = "_all"
}
path, err := uritemplates.Expand("/_cluster/state/{metrics}/{indices}", map[string]string{
"metrics": metrics,
"indices": indices,
})
if err != nil {
return "", url.Values{}, err
}
// Add query string parameters
params := url.Values{}
if s.masterTimeout != "" {
params.Set("master_timeout", s.masterTimeout)
}
if s.flatSettings != nil {
params.Set("flat_settings", fmt.Sprintf("%v", *s.flatSettings))
}
if s.local != nil {
params.Set("local", fmt.Sprintf("%v", *s.local))
}
return path, params, nil
}
// Validate checks if the operation is valid.
func (s *ClusterStateService) Validate() error {
return nil
}
// Do executes the operation.
func (s *ClusterStateService) Do() (*ClusterStateResponse, 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("GET", path, params, nil)
if err != nil {
return nil, err
}
// Return operation response
ret := new(ClusterStateResponse)
if err := json.Unmarshal(res.Body, ret); err != nil {
return nil, err
}
return ret, nil
}
// ClusterStateResponse is the response of ClusterStateService.Do.
type ClusterStateResponse struct {
ClusterName string `json:"cluster_name"`
Version int `json:"version"`
MasterNode string `json:"master_node"`
Blocks map[string]interface{} `json:"blocks"`
Nodes map[string]*ClusterStateNode `json:"nodes"`
Metadata *ClusterStateMetadata `json:"metadata"`
RoutingTable map[string]*ClusterStateRoutingTable `json:"routing_table"`
RoutingNodes *ClusterStateRoutingNode `json:"routing_nodes"`
Allocations []interface{} `json:"allocations"`
Customs map[string]interface{} `json:"customs"`
}
type ClusterStateMetadata struct {
Templates map[string]interface{} `json:"templates"`
Indices map[string]interface{} `json:"indices"`
Repositories map[string]interface{} `json:"repositories"`
}
type ClusterStateNode struct {
Name string `json:"name"`
TransportAddress string `json:"transport_address"`
Attributes map[string]interface{} `json:"attributes"`
// TODO(oe) are these still valid?
State string `json:"state"`
Primary bool `json:"primary"`
Node string `json:"node"`
RelocatingNode *string `json:"relocating_node"`
Shard int `json:"shard"`
Index string `json:"index"`
}
type ClusterStateRoutingTable struct {
Indices map[string]interface{} `json:"indices"`
}
type ClusterStateRoutingNode struct {
Unassigned []interface{} `json:"unassigned"`
Nodes map[string]interface{} `json:"nodes"`
}
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