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clusterhealth.go
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clusterhealth.go
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// Copyright 2013 Matthew Baird
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package elastigo
import (
"encoding/json"
"fmt"
"strings"
)
// The cluster health API allows to get a very simple status on the health of the cluster.
// see http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/cluster-health.html
// TODO: implement wait_for_status, timeout, wait_for_relocating_shards, wait_for_nodes
// TODO: implement level (Can be one of cluster, indices or shards. Controls the details level of the health
// information returned. Defaults to cluster.)
func (c *Conn) Health(indices ...string) (ClusterHealthResponse, error) {
var url string
var retval ClusterHealthResponse
if len(indices) > 0 {
url = fmt.Sprintf("/_cluster/health/%s", strings.Join(indices, ","))
} else {
url = "/_cluster/health"
}
body, err := c.DoCommand("GET", url, nil, nil)
if err != nil {
return retval, err
}
if err == nil {
// marshall into json
jsonErr := json.Unmarshal(body, &retval)
if jsonErr != nil {
return retval, jsonErr
}
}
return retval, err
}
func (c *Conn) WaitForStatus(status string, timeout int, indices ...string) (ClusterHealthResponse, error) {
var url string
var retval ClusterHealthResponse
if len(indices) > 0 {
url = fmt.Sprintf("/_cluster/health/%s", strings.Join(indices, ","))
} else {
url = "/_cluster/health"
}
body, err := c.DoCommand("GET", url, map[string]interface{}{
"wait_for_status": status,
"timout": timeout,
}, nil)
if err != nil {
return retval, err
}
if err == nil {
jsonErr := json.Unmarshal(body, &retval)
if jsonErr != nil {
return retval, jsonErr
}
}
return retval, err
}
type ClusterStateFilter struct {
FilterNodes bool
FilterRoutingTable bool
FilterMetadata bool
FilterBlocks bool
FilterIndices []string
}
func (f ClusterStateFilter) Parameterize() []string {
var parts []string
if f.FilterNodes {
parts = append(parts, "filter_nodes=true")
}
if f.FilterRoutingTable {
parts = append(parts, "filter_routing_table=true")
}
if f.FilterMetadata {
parts = append(parts, "filter_metadata=true")
}
if f.FilterBlocks {
parts = append(parts, "filter_blocks=true")
}
if f.FilterIndices != nil && len(f.FilterIndices) > 0 {
parts = append(parts, strings.Join([]string{"filter_indices=", strings.Join(f.FilterIndices, ",")}, ""))
}
return parts
}
func (c *Conn) ClusterState(filter ClusterStateFilter) (ClusterStateResponse, error) {
var parameters []string
var url string
var retval ClusterStateResponse
parameters = filter.Parameterize()
url = fmt.Sprintf("/_cluster/state?%s", strings.Join(parameters, "&"))
body, err := c.DoCommand("GET", url, nil, nil)
if err != nil {
return retval, err
}
if err == nil {
// marshall into json
jsonErr := json.Unmarshal(body, &retval)
if jsonErr != nil {
return retval, jsonErr
}
}
return retval, err
}