/
cluster.go
141 lines (114 loc) · 3.48 KB
/
cluster.go
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package esmc
import (
es "github.com/peterbourgon/elasticsearch"
"time"
)
type Cluster struct {
Name string
Mode Mode
cluster *es.Cluster
}
// Connects to a cluster using the provided Config.
func NewCluster(config Config) *Cluster {
return &Cluster{
Name: config.Name(),
Mode: config.Mode(),
cluster: es.NewCluster(
config.Endpoints,
config.PingInterval(),
config.PingTimeout(),
),
}
}
// Wraps es.Cluster.Shutdown
func (c *Cluster) Shutdown() {
c.cluster.Shutdown()
}
func (c *Cluster) labels(requestType string, ok bool) map[string]string {
labels := map[string]string{
"cluster": c.Name,
"cluster_mode": c.Mode.String(),
"request_type": requestType,
}
if ok {
labels["outcome"] = "success"
} else {
labels["outcome"] = "failed"
}
return labels
}
// Wraps es.Cluster.Execute with instrumentation.
func (c *Cluster) Execute(f es.Fireable, response interface{}) (err error) {
defer func(began time.Time) {
labels := c.labels("execute", err == nil)
updateRequestMetrics(labels, time.Since(began))
}(time.Now())
return c.cluster.Execute(f, response)
}
// Wraps es.Cluster.Index with instrumentation.
func (c *Cluster) Index(r es.IndexRequest) (_ es.IndexResponse, err error) {
defer func(began time.Time) {
labels := c.labels("index", err == nil)
updateRequestMetrics(labels, time.Since(began))
}(time.Now())
return c.cluster.Index(r)
}
// Wraps es.Cluster.Update with instrumentation.
func (c *Cluster) Update(r es.UpdateRequest) (_ es.IndexResponse, err error) {
defer func(began time.Time) {
labels := c.labels("update", err == nil)
updateRequestMetrics(labels, time.Since(began))
}(time.Now())
return c.cluster.Update(r)
}
// Wraps es.Cluster.Delete with instrumentation.
func (c *Cluster) Delete(r es.DeleteRequest) (_ es.IndexResponse, err error) {
defer func(began time.Time) {
labels := c.labels("delete", err == nil)
updateRequestMetrics(labels, time.Since(began))
}(time.Now())
return c.cluster.Delete(r)
}
// Wraps es.Cluster.Create with instrumentation.
func (c *Cluster) Create(r es.CreateRequest) (_ es.IndexResponse, err error) {
defer func(began time.Time) {
labels := c.labels("create", err == nil)
updateRequestMetrics(labels, time.Since(began))
}(time.Now())
return c.cluster.Create(r)
}
// Wraps es.Cluster.Bulk with instrumentation.
func (c *Cluster) Bulk(r es.BulkRequest) (_ es.BulkResponse, err error) {
defer func(began time.Time) {
labels := c.labels("bulk", err == nil)
updateRequestMetrics(labels, time.Since(began))
}(time.Now())
return c.cluster.Bulk(r)
}
// Wraps es.Cluster.MultiSearch with instrumentation. Implements es.MultiSearcher.
func (c *Cluster) MultiSearch(r es.MultiSearchRequest) (resp es.MultiSearchResponse, err error) {
defer func(began time.Time) {
labels := c.labels("multi_search", err == nil)
updateRequestMetrics(labels, time.Since(began))
if err == nil {
for _, response := range resp.Responses {
updateReportedMetrics(labels, response.Took)
}
}
}(time.Now())
return c.cluster.MultiSearch(r)
}
// Wraps es.Cluster.Search with instrumentation. Implements es.Searcher.
func (c *Cluster) Search(r es.SearchRequest) (response es.SearchResponse, err error) {
defer func(began time.Time) {
labels := c.labels("search", err == nil)
if err == nil && response.TimedOut {
labels["outcome"] = "timeout"
}
updateRequestMetrics(labels, time.Since(began))
if err == nil {
updateReportedMetrics(labels, response.Took)
}
}(time.Now())
return c.cluster.Search(r)
}