move cache to the separate package

go.mod

@@ -9,7 +9,7 @@ require (
 	github.com/grafana/grafana-plugin-sdk-go v0.65.0
 	github.com/grafana/grafana_plugin_model v0.0.0-20180518082423-84176c64269d
 	github.com/hashicorp/go-hclog v0.9.2
-	github.com/hashicorp/go-plugin v1.2.2
+	github.com/hashicorp/go-plugin v1.2.2 // indirect
 	github.com/kr/pretty v0.1.0 // indirect
 	github.com/patrickmn/go-cache v2.1.0+incompatible
 	github.com/pkg/errors v0.8.1 // indirect

pkg/cache/cache.go

@@ -1,4 +1,4 @@
-package main
+package cache
 
 import (
 	"crypto/sha1"

pkg/cache/cache_test.go

@@ -1,4 +1,4 @@
-package main
+package cache
 
 import (
 	"testing"

pkg/datasource.go

@@ -7,6 +7,7 @@ import (
 	"fmt"
 	"time"
 
+	"github.com/alexanderzobnin/grafana-zabbix/pkg/cache"
 	"github.com/alexanderzobnin/grafana-zabbix/pkg/gtime"
 	"github.com/alexanderzobnin/grafana-zabbix/pkg/zabbixapi"
 
@@ -16,7 +17,7 @@ import (
 )
 
 type ZabbixDatasource struct {
-	datasourceCache *Cache
+	datasourceCache *cache.Cache
 	logger          log.Logger
 }
 
@@ -26,7 +27,7 @@ type ZabbixDatasourceInstance struct {
 	zabbixAPI  *zabbixapi.ZabbixAPI
 	dsInfo     *backend.DataSourceInstanceSettings
 	Settings   *ZabbixDatasourceSettings
-	queryCache *Cache
+	queryCache *cache.Cache
 	logger     log.Logger
 }
 
@@ -46,7 +47,7 @@ func NewZabbixDatasourceInstance(dsInfo *backend.DataSourceInstanceSettings) (*Z
 		dsInfo:     dsInfo,
 		zabbixAPI:  zabbixAPI,
 		Settings:   zabbixSettings,
-		queryCache: NewCache(zabbixSettings.CacheTTL, 10*time.Minute),
+		queryCache: cache.NewCache(zabbixSettings.CacheTTL, 10*time.Minute),
 		logger:     log.New(),
 	}, nil
 }
@@ -113,11 +114,11 @@ func (ds *ZabbixDatasource) GetDatasource(pluginContext backend.PluginContext) (
 	dsSettings := pluginContext.DataSourceInstanceSettings
 	dsKey := fmt.Sprintf("%d-%d", pluginContext.OrgID, dsSettings.ID)
 	// Get hash to check if settings changed
-	dsInfoHash := HashDatasourceInfo(dsSettings)
+	dsInfoHash := cache.HashDatasourceInfo(dsSettings)
 
 	if cachedData, ok := ds.datasourceCache.Get(dsKey); ok {
 		if cachedDS, ok := cachedData.(*ZabbixDatasourceInstance); ok {
-			cachedDSHash := HashDatasourceInfo(cachedDS.dsInfo)
+			cachedDSHash := cache.HashDatasourceInfo(cachedDS.dsInfo)
 			if cachedDSHash == dsInfoHash {
 				return cachedDS, nil
 			}

pkg/plugin.go

@@ -5,6 +5,7 @@ import (
 	"os"
 	"time"
 
+	"github.com/alexanderzobnin/grafana-zabbix/pkg/cache"
 	"github.com/grafana/grafana-plugin-sdk-go/backend"
 	"github.com/grafana/grafana-plugin-sdk-go/backend/log"
 	"github.com/grafana/grafana-plugin-sdk-go/backend/resource/httpadapter"
@@ -43,7 +44,7 @@ func Init(logger log.Logger, mux *http.ServeMux) *ZabbixDatasource {
 
 	ds := &ZabbixDatasource{
 		logger:          logger,
-		datasourceCache: NewCache(10*time.Minute, 10*time.Minute),
+		datasourceCache: cache.NewCache(10*time.Minute, 10*time.Minute),
 	}
 
 	mux.HandleFunc("/", ds.rootHandler)

pkg/zabbix.go

@@ -6,6 +6,7 @@ import (
 	"regexp"
 	"time"
 
+	"github.com/alexanderzobnin/grafana-zabbix/pkg/cache"
 	"github.com/alexanderzobnin/grafana-zabbix/pkg/zabbix"
 	"github.com/alexanderzobnin/grafana-zabbix/pkg/zabbixapi"
 	simplejson "github.com/bitly/go-simplejson"
@@ -28,7 +29,7 @@ var CachedMethods = map[string]bool{
 func (ds *ZabbixDatasourceInstance) ZabbixQuery(ctx context.Context, apiReq *ZabbixAPIRequest) (*simplejson.Json, error) {
 	var resultJson *simplejson.Json
 	var err error
-	requestHash := HashString(apiReq.String())
+	requestHash := cache.HashString(apiReq.String())
 
 	cachedResult, queryExistInCache := ds.queryCache.Get(requestHash)
 	if !queryExistInCache {