Adding logging framework

Adding a framework for logging
We will add other logging integrations into this framework

Issue-ID: AAF-148
Change-Id: Ia16d1ddf4c24a5e2f957c429aff23970d081ccc4
Signed-off-by: Kiran Kamineni <kiran.k.kamineni@intel.com>

3 files changed, 68 insertions, 0 deletions

diff --git a/sms-service/src/sms/backend/backend.go b/sms-service/src/sms/backend/backend.go
index 2cc3798..a1055e6 100644
--- a/sms-service/src/sms/backend/backend.go
+++ b/sms-service/src/sms/backend/backend.go
@@ -18,6 +18,7 @@ package backend
 
 import (
 	smsconfig "sms/config"
+	smslogger "sms/log"
 )
 
 // SecretDomain is where Secrets are stored.
@@ -66,6 +67,7 @@ func InitSecretBackend() (SecretBackend, error) {
 
 	err := backendImpl.Init()
 	if err != nil {
+		smslogger.WriteError(err.Error())
 		return nil, err
 	}
 
diff --git a/sms-service/src/sms/config/config.go b/sms-service/src/sms/config/config.go
index 15f3660..23af251 100644
--- a/sms-service/src/sms/config/config.go
+++ b/sms-service/src/sms/config/config.go
@@ -43,6 +43,7 @@ func ReadConfigFile(file string) (*SMSConfiguration, error) {
 		if err != nil {
 			return nil, err
 		}
+		defer f.Close()
 
 		SMSConfig = &SMSConfiguration{}
 		decoder := json.NewDecoder(f)
diff --git a/sms-service/src/sms/log/logger.go b/sms-service/src/sms/log/logger.go
new file mode 100644
index 0000000..ad7d388
--- /dev/null
+++ b/sms-service/src/sms/log/logger.go
@@ -0,0 +1,65 @@
+/*
+ * Copyright 2018 Intel Corporation, Inc
+ *
+ * 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 log
+
+import (
+	"log"
+	"os"
+)
+
+var errLogger *log.Logger
+var warnLogger *log.Logger
+var infoLogger *log.Logger
+
+func init() {
+	f, err := os.OpenFile("sms.log", os.O_RDWR|os.O_CREATE|os.O_APPEND, 0666)
+	if err != nil {
+		log.Println("Unable to create a log file")
+		log.Println(err)
+		errLogger = log.New(os.Stderr, "ERROR: ", log.Lshortfile)
+		warnLogger = log.New(os.Stdout, "WARNING: ", log.Lshortfile)
+		infoLogger = log.New(os.Stdout, "INFO: ", log.Lshortfile)
+	} else {
+		errLogger = log.New(f, "ERROR: ", log.Lshortfile)
+		warnLogger = log.New(f, "WARNING: ", log.Lshortfile)
+		infoLogger = log.New(f, "INFO: ", log.Lshortfile)
+	}
+}
+
+// WriteError writes output to the writer we have
+// defined durint its creation with ERROR prefix
+func WriteError(msg string) {
+	if errLogger != nil {
+		errLogger.Println(msg)
+	}
+}
+
+// WriteWarn writes output to the writer we have
+// defined durint its creation with WARNING prefix
+func WriteWarn(msg string) {
+	if warnLogger != nil {
+		warnLogger.Println(msg)
+	}
+}
+
+// WriteInfo writes output to the writer we have
+// defined durint its creation with INFO prefix
+func WriteInfo(msg string) {
+	if infoLogger != nil {
+		infoLogger.Println(msg)
+	}
+}