Stop fetching completed tasks count from DB

CHANGELOG.md

@@ -11,6 +11,7 @@ All notable changes to this project will be documented in this file.
 - Move `PlatformMetric` to `iexec-core-library` subproject, modify it to become immutable. (#628 #629)
 - Add prometheus endpoint with custom metrics. (#632)
 - Expose version through prometheus endpoint. (#637)
+- Stop fetching completed tasks count from DB. (#638)
 
 ### Quality
 

iexec-core-library/src/main/java/com/iexec/core/metric/PlatformMetric.java

@@ -32,7 +32,7 @@ public class PlatformMetric {
     int aliveAvailableCpu;
     int aliveTotalGpu;
     int aliveAvailableGpu;
-    int completedTasks;
+    long completedTasks;
     long dealEventsCount;
     long dealsCount;
     long replayDealsCount;

src/main/java/com/iexec/core/metric/MetricService.java

@@ -18,7 +18,6 @@
 
 import com.iexec.core.chain.DealWatcherService;
 import com.iexec.core.task.TaskService;
-import com.iexec.core.task.TaskStatus;
 import com.iexec.core.worker.WorkerService;
 import org.springframework.stereotype.Service;
 
@@ -43,7 +42,7 @@ public PlatformMetric getPlatformMetrics() {
                 .aliveAvailableCpu(workerService.getAliveAvailableCpu())
                 .aliveTotalGpu(workerService.getAliveTotalGpu())
                 .aliveAvailableGpu(workerService.getAliveAvailableGpu())
-                .completedTasks(taskService.findByCurrentStatus(TaskStatus.COMPLETED).size())
+                .completedTasks(taskService.getCompletedTasksCount())
                 .dealEventsCount(dealWatcherService.getDealEventsCount())
                 .dealsCount(dealWatcherService.getDealsCount())
                 .replayDealsCount(dealWatcherService.getReplayDealsCount())

src/main/java/com/iexec/core/task/TaskService.java

@@ -260,4 +260,8 @@ public boolean isConsensusReached(ReplicatesList replicatesList) {
         int offChainWinners = replicatesList.getNbValidContributedWinners(chainTask.getConsensusValue());
         return offChainWinners >= onChainWinners;
     }
+
+    public long getCompletedTasksCount() {
+        return (long) completedTasksCounter.count();
+    }
 }

src/test/java/com/iexec/core/metric/MetricServiceTests.java

@@ -18,7 +18,6 @@
 
 import com.iexec.core.chain.DealWatcherService;
 import com.iexec.core.task.TaskService;
-import com.iexec.core.task.TaskStatus;
 import com.iexec.core.worker.Worker;
 import com.iexec.core.worker.WorkerService;
 import org.junit.jupiter.api.BeforeEach;
@@ -58,8 +57,8 @@ void shouldGetPlatformMetrics() {
         when(workerService.getAliveAvailableCpu()).thenReturn(1);
         when(workerService.getAliveTotalGpu()).thenReturn(1);
         when(workerService.getAliveAvailableGpu()).thenReturn(1);
-        when(taskService.findByCurrentStatus(TaskStatus.COMPLETED))
-                .thenReturn(List.of());
+        when(taskService.getCompletedTasksCount())
+                .thenReturn(10L);
         when(dealWatcherService.getDealEventsCount()).thenReturn(10L);
         when(dealWatcherService.getDealsCount()).thenReturn(8L);
         when(dealWatcherService.getReplayDealsCount()).thenReturn(2L);
@@ -71,11 +70,11 @@ void shouldGetPlatformMetrics() {
         assertThat(metric.getAliveAvailableCpu()).isEqualTo(1);
         assertThat(metric.getAliveTotalGpu()).isEqualTo(1);
         assertThat(metric.getAliveAvailableGpu()).isEqualTo(1);
-        assertThat(metric.getCompletedTasks()).isZero();
+        assertThat(metric.getCompletedTasks()).isEqualTo(10L);
         assertThat(metric.getDealEventsCount()).isEqualTo(10);
         assertThat(metric.getDealsCount()).isEqualTo(8);
         assertThat(metric.getReplayDealsCount()).isEqualTo(2);
         assertThat(metric.getLatestBlockNumberWithDeal()).isEqualTo(255);
     }
 
-}
+}

src/test/java/com/iexec/core/task/TaskServiceTests.java

@@ -40,8 +40,7 @@
 import java.time.temporal.ChronoUnit;
 import java.util.*;
 
-import static com.iexec.core.task.TaskStatus.INITIALIZED;
-import static com.iexec.core.task.TaskStatus.RUNNING;
+import static com.iexec.core.task.TaskStatus.*;
 import static com.iexec.core.task.TaskTestsUtils.*;
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.mockito.ArgumentMatchers.any;
@@ -358,4 +357,24 @@ void shouldConsensusBeReached() {
         Mockito.verify(iexecHubService).getChainTask(any());
     }
     // endregion
+
+    // region getCompletedTasksCount
+    @Test
+    void shouldGet0CompletedTasksCountWhenNoTaskCompleted() {
+        final long completedTasksCount = taskService.getCompletedTasksCount();
+        assertThat(completedTasksCount).isZero();
+    }
+
+    @Test
+    void shouldGet3CompletedTasksCount() {
+        final TaskService taskService = new TaskService(taskRepository, iexecHubService);
+        final Task task = Task.builder().currentStatus(COMPLETED).build();
+        when(taskRepository.findByCurrentStatus(COMPLETED))
+                .thenReturn(List.of(task, task, task));
+        taskService.init();
+
+        final long completedTasksCount = taskService.getCompletedTasksCount();
+        assertThat(completedTasksCount).isEqualTo(3);
+    }
+    // endregion
 }