control-service: add MeterRegistry counters for DataJobsSynchronizer

projects/control-service/projects/pipelines_control_service/src/main/java/com/vmware/taurus/service/deploy/DataJobsSynchronizer.java

@@ -10,6 +10,7 @@
 import com.vmware.taurus.service.model.ActualDataJobDeployment;
 import com.vmware.taurus.service.model.DataJob;
 import com.vmware.taurus.service.model.DesiredDataJobDeployment;
+import com.vmware.taurus.service.monitoring.DataJobSynchronizerMonitor;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
 import net.javacrumbs.shedlock.spring.annotation.SchedulerLock;
@@ -49,6 +50,8 @@ public class DataJobsSynchronizer {
 
   private final ThreadPoolTaskExecutor dataJobsSynchronizerTaskExecutor;
 
+  private final DataJobSynchronizerMonitor dataJobSynchronizerMonitor;
+
   @Value("${datajobs.deployment.configuration.synchronization.task.enabled:false}")
   private boolean synchronizationEnabled;
 
@@ -86,6 +89,7 @@ public void synchronizeDataJobs() {
           "Skipping data job deployment synchronization because deployment names cannot be loaded"
               + " from Kubernetes.",
           e);
+      dataJobSynchronizerMonitor.countSynchronizerFailures();
       return;
     }
 
@@ -127,6 +131,7 @@ public void synchronizeDataJobs() {
         countDownLatch);
 
     waitForSynchronizationCompletion(countDownLatch);
+    dataJobSynchronizerMonitor.countSuccessfulSynchronizerInvocation();
   }
 
   private void synchronizeDataJobs(

projects/control-service/projects/pipelines_control_service/src/main/java/com/vmware/taurus/service/monitoring/DataJobSynchronizerMonitor.java

@@ -0,0 +1,65 @@
+/*
+ * Copyright 2021-2023 VMware, Inc.
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+package com.vmware.taurus.service.monitoring;
+
+import io.micrometer.core.instrument.Counter;
+import io.micrometer.core.instrument.MeterRegistry;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Component;
+
+@Component
+@Slf4j
+public class DataJobSynchronizerMonitor {
+
+  public static final String DATAJOBS_SUCCESSFUL_SYNCHRONIZER_INVOCATIONS_COUNTER =
+      "vdk.deploy.datajob.synchronizer.successful.invocations.counter";
+  public static final String DATAJOBS_FAILED_SYNCHRONIZER_INVOCATIONS_COUNTER =
+      "vdk.deploy.datajob.synchronizer.failed.invocations.counter";
+
+  private final Counter successfulInvocationsCounter;
+  private final Counter failedInvocationsCounter;
+
+  @Autowired(required = true)
+  public DataJobSynchronizerMonitor(MeterRegistry meterRegistry) {
+    successfulInvocationsCounter =
+        Counter.builder(DATAJOBS_SUCCESSFUL_SYNCHRONIZER_INVOCATIONS_COUNTER)
+            .description(
+                "Counts the number of times the synchronizeDataJobs() method is called and"
+                    + " completes.")
+            .register(meterRegistry);
+
+    failedInvocationsCounter =
+        Counter.builder(DATAJOBS_FAILED_SYNCHRONIZER_INVOCATIONS_COUNTER)
+            .description(
+                "Counts the number of times the synchronizeDataJobs() method failed to finish.")
+            .register(meterRegistry);
+  }
+
+  /**
+   * Counts the number of times the DataJobSynchronizer's synchronize method was invoked and
+   * completed.
+   */
+  public void countSuccessfulSynchronizerInvocation() {
+    incrementCounter(successfulInvocationsCounter);
+  }
+
+  /**
+   * Counts the number of failed data job deployment synchronizations invocations by the
+   * DataJobsSynchronizer due to K8S issues.
+   */
+  public void countSynchronizerFailures() {
+    incrementCounter(failedInvocationsCounter);
+  }
+
+  private void incrementCounter(Counter counter) {
+    try {
+      counter.increment();
+    } catch (Exception e) {
+      log.warn("Error while trying to increment counter.", e);
+    }
+  }
+}

projects/control-service/projects/pipelines_control_service/src/test/java/com/vmware/taurus/service/monitoring/DataJobSynchronizerMonitorTest.java

@@ -0,0 +1,43 @@
+/*
+ * Copyright 2021-2023 VMware, Inc.
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+package com.vmware.taurus.service.monitoring;
+
+import com.vmware.taurus.ControlplaneApplication;
+import io.micrometer.core.instrument.MeterRegistry;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+
+@SpringBootTest(classes = ControlplaneApplication.class)
+public class DataJobSynchronizerMonitorTest {
+
+  @Autowired DataJobSynchronizerMonitor dataJobSynchronizerMonitor;
+
+  @Autowired private MeterRegistry meterRegistry;
+
+  @Test
+  public void testIncrementSuccessfulInvocations() {
+    var counter =
+        meterRegistry.counter(
+            DataJobSynchronizerMonitor.DATAJOBS_SUCCESSFUL_SYNCHRONIZER_INVOCATIONS_COUNTER);
+    Assertions.assertEquals(0.0, counter.count(), 0.001);
+    dataJobSynchronizerMonitor.countSuccessfulSynchronizerInvocation();
+
+    Assertions.assertEquals(1, counter.count(), 0.001);
+  }
+
+  @Test
+  public void testIncrementFailedInvocations() {
+    var counter =
+        meterRegistry.counter(
+            DataJobSynchronizerMonitor.DATAJOBS_FAILED_SYNCHRONIZER_INVOCATIONS_COUNTER);
+    Assertions.assertEquals(0.0, counter.count(), 0.001);
+    dataJobSynchronizerMonitor.countSynchronizerFailures();
+
+    Assertions.assertEquals(1, counter.count(), 0.001);
+  }
+}