Extend heartbeat to also include som health status

Add info about the internal status of DFC to the healtCheck message.

Change-Id: Ic2ad3e5b97c42d6affe1ac4e1d7cf2274027f881
Issue-ID: DCAEGEN2-1403
Signed-off-by: elinuxhenrik <henrik.b.andersson@est.tech>

3 files changed, 28 insertions, 7 deletions

diff --git a/datafile-app-server/src/main/java/org/onap/dcaegen2/collectors/datafile/controllers/HeartbeatController.java b/datafile-app-server/src/main/java/org/onap/dcaegen2/collectors/datafile/controllers/HeartbeatController.java
index b0e339ef..c6d56c42 100644
--- a/datafile-app-server/src/main/java/org/onap/dcaegen2/collectors/datafile/controllers/HeartbeatController.java
+++ b/datafile-app-server/src/main/java/org/onap/dcaegen2/collectors/datafile/controllers/HeartbeatController.java
@@ -16,13 +16,18 @@
 
 package org.onap.dcaegen2.collectors.datafile.controllers;
 
+import static org.onap.dcaegen2.collectors.datafile.model.logging.MappedDiagnosticContext.ENTRY;
+import static org.onap.dcaegen2.collectors.datafile.model.logging.MappedDiagnosticContext.EXIT;
+
 import io.swagger.annotations.Api;
 import io.swagger.annotations.ApiOperation;
 import io.swagger.annotations.ApiResponse;
 import io.swagger.annotations.ApiResponses;
 import org.onap.dcaegen2.collectors.datafile.model.logging.MappedDiagnosticContext;
+import org.onap.dcaegen2.collectors.datafile.tasks.ScheduledTasks;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.http.HttpHeaders;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
@@ -43,6 +48,13 @@ public class HeartbeatController {
 
     private static final Logger logger = LoggerFactory.getLogger(HeartbeatController.class);
 
+    private final ScheduledTasks scheduledTasks;
+
+    @Autowired
+    public HeartbeatController(ScheduledTasks scheduledTasks) {
+        this.scheduledTasks = scheduledTasks;
+    }
+
     /**
      * Checks the heartbeat of DFC.
      *
@@ -54,13 +66,18 @@ public class HeartbeatController {
             @ApiResponse(code = 200, message = "DATAFILE service is living"),
             @ApiResponse(code = 401, message = "You are not authorized to view the resource"),
             @ApiResponse(code = 403, message = "Accessing the resource you were trying to reach is forbidden"),
-            @ApiResponse(code = 404, message = "The resource you were trying to reach is not found")})
+            @ApiResponse(code = 404, message = "The resource you were trying to reach is not found") })
     public Mono<ResponseEntity<String>> heartbeat(@RequestHeader HttpHeaders headers) {
         MappedDiagnosticContext.initializeTraceContext(headers);
-        logger.info(MappedDiagnosticContext.ENTRY, "Heartbeat request");
-        Mono<ResponseEntity<String>> response = Mono.just(new ResponseEntity<>("I'm living", HttpStatus.OK));
-        logger.trace("Heartbeat");
-        logger.info(MappedDiagnosticContext.EXIT, "Heartbeat request");
+        logger.info(ENTRY, "Heartbeat request");
+
+        StringBuilder statusString = new StringBuilder("I'm living! Status: ");
+        statusString.append("numberOfFileCollectionTasks=").append(scheduledTasks.getCurrentNumberOfTasks())
+                .append(",");
+        statusString.append("fileCacheSize=").append(scheduledTasks.publishedFilesCacheSize());
+
+        Mono<ResponseEntity<String>> response = Mono.just(new ResponseEntity<>(statusString.toString(), HttpStatus.OK));
+        logger.info(EXIT, "Heartbeat request");
         return response;
     }
 }
diff --git a/datafile-app-server/src/main/java/org/onap/dcaegen2/collectors/datafile/service/PublishedFileCache.java b/datafile-app-server/src/main/java/org/onap/dcaegen2/collectors/datafile/service/PublishedFileCache.java
index 257c356c..2b3a0ef6 100644
--- a/datafile-app-server/src/main/java/org/onap/dcaegen2/collectors/datafile/service/PublishedFileCache.java
+++ b/datafile-app-server/src/main/java/org/onap/dcaegen2/collectors/datafile/service/PublishedFileCache.java
@@ -63,7 +63,7 @@ public class PublishedFileCache {
         }
     }
 
-    int size() {
+    public int size() {
         return publishedFiles.size();
     }
 
diff --git a/datafile-app-server/src/main/java/org/onap/dcaegen2/collectors/datafile/tasks/ScheduledTasks.java b/datafile-app-server/src/main/java/org/onap/dcaegen2/collectors/datafile/tasks/ScheduledTasks.java
index 037f495f..3e4481dd 100644
--- a/datafile-app-server/src/main/java/org/onap/dcaegen2/collectors/datafile/tasks/ScheduledTasks.java
+++ b/datafile-app-server/src/main/java/org/onap/dcaegen2/collectors/datafile/tasks/ScheduledTasks.java
@@ -111,10 +111,14 @@ public class ScheduledTasks {
         return new PublishedChecker(applicationConfiguration);
     }
 
-    protected int getCurrentNumberOfTasks() {
+    public int getCurrentNumberOfTasks() {
         return currentNumberOfTasks.get();
     }
 
+    public int publishedFilesCacheSize() {
+        return alreadyPublishedFiles.size();
+    }
+
     protected DMaaPMessageConsumer createConsumerTask() {
         return new DMaaPMessageConsumer(this.applicationConfiguration);
     }