[dvc] Config flag for subscribing on disk partitions automatically. Updated with integration test and unit test.

Author: kristyelee

clients/da-vinci-client/src/main/java/com/linkedin/davinci/DaVinciBackend.java

@@ -399,7 +399,7 @@ private Function<String, Boolean> functionToCheckWhetherStorageEngineShouldBeKep
     };
   }
 
-  protected synchronized void bootstrap() {
+  final synchronized void bootstrap() {
     List<AbstractStorageEngine> storageEngines =
         storageService.getStorageEngineRepository().getAllLocalStorageEngines();
     LOGGER.info("Starting bootstrap, storageEngines: {}", storageEngines);

clients/da-vinci-client/src/test/java/com/linkedin/davinci/DaVinciBackendTest.java

@@ -267,10 +267,10 @@ public Object answer(InvocationOnMock invocation) throws Throwable {
     when(mockCombinedProperties.getBoolean(anyString(), anyBoolean())).thenReturn(true);
     backend.bootstrap();
 
+    // DA_VINCI_SUBSCRIBE_ON_DISK_PARTITIONS_AUTOMATICALLY == true
     subscription = mockStoreBackend.getSubscription();
     assertTrue(subscription.contains(0));
     assertTrue(subscription.contains(1));
     assertTrue(subscription.contains(2));
-
   }
 }