Prometheus Kafka Writer Microservice

[demo.git] / vnfs / DAaaS / microservices / prom-kafka-writer / pkg / config / logger.go

diff --git a/vnfs/DAaaS/microservices/prom-kafka-writer/pkg/config/logger.go b/vnfs/DAaaS/microservices/prom-kafka-writer/pkg/config/logger.go
new file mode 100644 (file)
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+++ b/vnfs/DAaaS/microservices/prom-kafka-writer/pkg/config/logger.go
@@ -0,0 +1,38 @@
+/*
+ *
+ * Copyright 2019 Intel Corporation.
+ * 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 config
+
+import (
+       "go.uber.org/zap"
+       "log"
+       "sync"
+)
+
+var logOnce sync.Once
+var slogger *zap.SugaredLogger
+
+//GetLoggerInstance returns a singleton instance of logger
+func GetLoggerInstance() *zap.SugaredLogger {
+       logOnce.Do(func() {
+               logger, err := zap.NewProduction()
+               if err != nil {
+                       log.Fatalf("can't initialize zap logger: %v", err)
+               }
+               defer logger.Sync()
+               slogger = logger.Sugar()
+       })
+       return slogger
+}