log format json

resources/iot-c/Readme.md

@@ -152,4 +152,15 @@ grpcurl --plaintext -d '{"name": "test222"}' localhost:9091 com.gmos.iotc.proto.
  - Use the `/gnmi` rest end point in the collector-ui service to test grpc 
  - New env variables defined for the gnmi device are: 
  - `GNMI_GRPC_HOST_NAME` -> the ip address of the grpc/gnmi network device (target) 
- - `GNMI_GRPC_PORT` -> the grpc port  of the grpc/gnmi network device (target)
+ - `GNMI_GRPC_PORT` -> the grpc port  of the grpc/gnmi network device (target)
+
+## log format json
+ - To enable log format add the following to the application.yml
+ - This is a quick a "dirty" way to have json log, probably we need to use more clean approach 
+ - [ref](https://stackoverflow.com/questions/53730449/is-there-a-recommended-way-to-get-spring-boot-to-json-format-logs-with-logback)
+```yaml
+logging:
+  #https://stackoverflow.com/questions/53730449/is-there-a-recommended-way-to-get-spring-boot-to-json-format-logs-with-logback
+  pattern:
+    console: "{\"time\": \"%d\", \"level\": \"%p\", \"correlation-id\": \"%X{X-Correlation-Id}\", \"source\": \"%logger{63}:%L\", \"message\": \"%replace(%m%wEx{6}){'[\r\n]+', '\\n'}%nopex\"}%n"
+```

resources/iot-c/collector-ui/src/main/java/com/gmos/iotc/collectorui/web/DataRestController.java

@@ -10,6 +10,8 @@
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.RestController;
 
+import java.net.InetAddress;
+import java.net.UnknownHostException;
 import java.util.List;
 
 @RestController
@@ -27,6 +29,19 @@ public DataRestController(DataHdrl dataHdrl, DataHdrlGrpcClient dataHdrlGrpcClie
     this.gnmiHdrlGrpcClient = gnmiHdrlGrpcClient;
   }
 
+  @GetMapping("/hello")
+  public String hello() {
+    String host = "UnknownHost";
+    try{
+      host = InetAddress.getLocalHost().getHostName();
+    }
+    catch (UnknownHostException e ){
+      logger.error("Failed to get hostname: {}", e.getMessage());
+    }
+    logger.info("Hello from {}", host);
+    return "Hello from " + host;
+  }
+
   @GetMapping("/getData")
   public List<PerformanceDataDTO> getData() {
     logger.debug("Get Request getData");

resources/iot-c/collector-ui/src/main/resources/application.yml

@@ -8,6 +8,9 @@ spring:
 logging:
   level:
     com.gmos.iotc: ${LOG_LEVEL:DEBUG}
+  #https://stackoverflow.com/questions/53730449/is-there-a-recommended-way-to-get-spring-boot-to-json-format-logs-with-logback
+  pattern:
+    console: "{\"time\": \"%d\", \"level\": \"%p\", \"correlation-id\": \"%X{X-Correlation-Id}\", \"source\": \"%logger{63}:%L\", \"message\": \"%replace(%m%wEx{6}){'[\r\n]+', '\\n'}%nopex\"}%n"
 
 server:
   port: ${TOMCAT_HTTP_PORT_V:8093}