Misthios/grafana-zabbix
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do not cache history requests

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This commit is contained in:
Alexander Zobnin
2020-06-01 12:50:22 +03:00
parent 2c10fdf996
commit ee2cc49ba1
4 changed files with 14 additions and 4 deletions
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2
pkg/datasource.go
View File

@@ -131,7 +131,7 @@ func newZabbixDatasource(dsInfo *backend.DataSourceInstanceSettings) (*ZabbixDat
url: zabbixURL,
dsInfo: dsInfo,
Settings: zabbixSettings,
queryCache: NewCache(10*time.Minute, 10*time.Minute),
queryCache: NewCache(zabbixSettings.CacheTTL, 10*time.Minute),
httpClient: &http.Client{
Transport: &http.Transport{
TLSClientConfig: &tls.Config{

1
pkg/resource_handler.go
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@@ -38,7 +38,6 @@ func (ds *ZabbixDatasource) zabbixAPIHandler(rw http.ResponseWriter, req *http.R
pluginCxt := httpadapter.PluginConfigFromContext(req.Context())
dsInstance, err := ds.GetDatasource(pluginCxt)
ds.logger.Debug("Invoke Zabbix API call", "ds", pluginCxt.DataSourceInstanceSettings.Name, "method", reqData.Method)
apiReq := &ZabbixAPIRequest{Method: reqData.Method, Params: reqData.Params}
result, err := dsInstance.ZabbixAPIQuery(req.Context(), apiReq)

14
pkg/zabbix_api.go
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@@ -13,16 +13,26 @@ import (
"golang.org/x/net/context"
)
var NotCachedMethods = map[string]bool{
"history.get": true,
"trend.get": true,
}
// ZabbixAPIQuery handles query requests to Zabbix
func (ds *ZabbixDatasourceInstance) ZabbixAPIQuery(ctx context.Context, apiReq *ZabbixAPIRequest) (*ZabbixAPIResourceResponse, error) {
var result interface{}
var err error
var queryExistInCache bool
result, queryExistInCache = ds.queryCache.Get(HashString(apiReq.String()))
requestHash := HashString(apiReq.String())
result, queryExistInCache = ds.queryCache.Get(requestHash)
if !queryExistInCache {
result, err = ds.ZabbixRequest(ctx, apiReq.Method, apiReq.Params)
ds.queryCache.Set(HashString(apiReq.String()), result)
if _, ok := NotCachedMethods[apiReq.Method]; !ok {
ds.logger.Debug("Write result to cache", "method", apiReq.Method)
ds.queryCache.Set(HashString(apiReq.String()), result)
}
if err != nil {
return nil, err
}

1
pkg/zabbix_api_core.go
View File

@@ -16,6 +16,7 @@ import (
// ZabbixRequest checks authentication and makes a request to the Zabbix API
func (ds *ZabbixDatasourceInstance) ZabbixRequest(ctx context.Context, method string, params ZabbixAPIParams) (*simplejson.Json, error) {
ds.logger.Debug("Invoke Zabbix API request", "ds", ds.dsInfo.Name, "method", method)
var result *simplejson.Json
var err error