Examples with SystemAdmins org.apache.samza.system.SystemAdmins used on opensource projects

Example 31 with SystemAdmins

use of org.apache.samza.system.SystemAdmins in project samza by apache.

the class TestTransactionalStateTaskRestoreManager method testGetStoreActionsForLoggedNonPersistentStore_RestoreToCheckpointedOffset.

@Test
public void testGetStoreActionsForLoggedNonPersistentStore_RestoreToCheckpointedOffset() {
    TaskModel mockTaskModel = mock(TaskModel.class);
    TaskName taskName = new TaskName("Partition 0");
    when(mockTaskModel.getTaskName()).thenReturn(taskName);
    Partition taskChangelogPartition = new Partition(0);
    when(mockTaskModel.getChangelogPartition()).thenReturn(taskChangelogPartition);
    String store1Name = "store1";
    StorageEngine store1Engine = mock(StorageEngine.class);
    StoreProperties mockStore1Properties = mock(StoreProperties.class);
    when(store1Engine.getStoreProperties()).thenReturn(mockStore1Properties);
    when(mockStore1Properties.isLoggedStore()).thenReturn(true);
    // non-persistent (in memory) store
    when(mockStore1Properties.isPersistedToDisk()).thenReturn(false);
    Map<String, StorageEngine> mockStoreEngines = ImmutableMap.of(store1Name, store1Engine);
    String changelog1SystemName = "system1";
    String changelog1StreamName = "store1Changelog";
    SystemStream changelog1SystemStream = new SystemStream(changelog1SystemName, changelog1StreamName);
    SystemStreamPartition changelog1SSP = new SystemStreamPartition(changelog1SystemStream, taskChangelogPartition);
    SystemStreamPartitionMetadata changelog1SSPMetadata = new SystemStreamPartitionMetadata("0", "10", "11");
    Map<String, SystemStream> mockStoreChangelogs = ImmutableMap.of(store1Name, changelog1SystemStream);
    String changelog1CheckpointedOffset = "5";
    CheckpointId checkpointId = CheckpointId.create();
    KafkaStateCheckpointMarker kafkaStateCheckpointMarker = new KafkaStateCheckpointMarker(changelog1SSP, changelog1CheckpointedOffset);
    ImmutableMap<String, KafkaStateCheckpointMarker> mockCheckpointedChangelogOffset = ImmutableMap.of(store1Name, kafkaStateCheckpointMarker);
    Map<SystemStreamPartition, SystemStreamPartitionMetadata> mockCurrentChangelogOffsets = ImmutableMap.of(changelog1SSP, changelog1SSPMetadata);
    SystemAdmins mockSystemAdmins = mock(SystemAdmins.class);
    SystemAdmin mockSystemAdmin = mock(SystemAdmin.class);
    when(mockSystemAdmins.getSystemAdmin(changelog1SSP.getSystem())).thenReturn(mockSystemAdmin);
    StorageManagerUtil mockStorageManagerUtil = mock(StorageManagerUtil.class);
    File mockLoggedStoreBaseDir = mock(File.class);
    File mockNonLoggedStoreBaseDir = mock(File.class);
    Config mockConfig = mock(Config.class);
    Clock mockClock = mock(Clock.class);
    Mockito.when(mockSystemAdmin.offsetComparator(anyString(), anyString())).thenAnswer((Answer<Integer>) invocation -> {
        String offset1 = (String) invocation.getArguments()[0];
        String offset2 = (String) invocation.getArguments()[1];
        return Long.valueOf(offset1).compareTo(Long.valueOf(offset2));
    });
    StoreActions storeActions = TransactionalStateTaskRestoreManager.getStoreActions(mockTaskModel, mockStoreEngines, mockStoreChangelogs, mockCheckpointedChangelogOffset, checkpointId, mockCurrentChangelogOffsets, mockSystemAdmins, mockStorageManagerUtil, mockLoggedStoreBaseDir, mockNonLoggedStoreBaseDir, mockConfig, mockClock);
    // ensure that there is nothing to delete or retain
    assertEquals(0, storeActions.storeDirsToDelete.size());
    // ensure that we restore from the oldest changelog offset to checkpointed changelog offset
    assertEquals("0", storeActions.storesToRestore.get(store1Name).startingOffset);
    assertEquals(changelog1CheckpointedOffset, storeActions.storesToRestore.get(store1Name).endingOffset);
}

Example 32 with SystemAdmins

use of org.apache.samza.system.SystemAdmins in project samza by apache.

the class TestTransactionalStateTaskRestoreManager method testGetStoreActionsForLoggedNonPersistentStore_FullRestoreIfCheckpointedOffsetInRangeButMaybeCompacted.

/**
 * This can happen if the changelog offset is valid but the checkpoint is older than min compaction lag ms. E.g., when
 * the job/container shut down and restarted after a long time.
 */
@Test
public void testGetStoreActionsForLoggedNonPersistentStore_FullRestoreIfCheckpointedOffsetInRangeButMaybeCompacted() {
    TaskModel mockTaskModel = mock(TaskModel.class);
    TaskName taskName = new TaskName("Partition 0");
    when(mockTaskModel.getTaskName()).thenReturn(taskName);
    Partition taskChangelogPartition = new Partition(0);
    when(mockTaskModel.getChangelogPartition()).thenReturn(taskChangelogPartition);
    String store1Name = "store1";
    StorageEngine store1Engine = mock(StorageEngine.class);
    StoreProperties mockStore1Properties = mock(StoreProperties.class);
    when(store1Engine.getStoreProperties()).thenReturn(mockStore1Properties);
    when(mockStore1Properties.isLoggedStore()).thenReturn(true);
    // non-persistent store
    when(mockStore1Properties.isPersistedToDisk()).thenReturn(false);
    Map<String, StorageEngine> mockStoreEngines = ImmutableMap.of(store1Name, store1Engine);
    String changelog1SystemName = "system1";
    String changelog1StreamName = "store1Changelog";
    SystemStream changelog1SystemStream = new SystemStream(changelog1SystemName, changelog1StreamName);
    SystemStreamPartition changelog1SSP = new SystemStreamPartition(changelog1SystemStream, taskChangelogPartition);
    // checkpointed changelog offset > newest offset (e.g. changelog topic got changed)
    SystemStreamPartitionMetadata changelog1SSPMetadata = new SystemStreamPartitionMetadata("10", "20", "21");
    Map<String, SystemStream> mockStoreChangelogs = ImmutableMap.of(store1Name, changelog1SystemStream);
    String changelog1CheckpointedOffset = "5";
    // checkpoint id older than default min.compaction.lag.ms
    CheckpointId checkpointId = CheckpointId.deserialize("0-0");
    KafkaStateCheckpointMarker kafkaStateCheckpointMarker = new KafkaStateCheckpointMarker(changelog1SSP, changelog1CheckpointedOffset);
    Map<String, KafkaStateCheckpointMarker> mockCheckpointedChangelogOffset = new HashMap<String, KafkaStateCheckpointMarker>() {

        {
            put(store1Name, kafkaStateCheckpointMarker);
        }
    };
    Map<SystemStreamPartition, SystemStreamPartitionMetadata> mockCurrentChangelogOffsets = ImmutableMap.of(changelog1SSP, changelog1SSPMetadata);
    SystemAdmins mockSystemAdmins = mock(SystemAdmins.class);
    SystemAdmin mockSystemAdmin = mock(SystemAdmin.class);
    when(mockSystemAdmins.getSystemAdmin(changelog1SSP.getSystem())).thenReturn(mockSystemAdmin);
    StorageManagerUtil mockStorageManagerUtil = mock(StorageManagerUtil.class);
    File mockLoggedStoreBaseDir = mock(File.class);
    File mockNonLoggedStoreBaseDir = mock(File.class);
    Config mockConfig = mock(Config.class);
    Clock mockClock = mock(Clock.class);
    Mockito.when(mockSystemAdmin.offsetComparator(anyString(), anyString())).thenAnswer((Answer<Integer>) invocation -> {
        String offset1 = (String) invocation.getArguments()[0];
        String offset2 = (String) invocation.getArguments()[1];
        return Long.valueOf(offset1).compareTo(Long.valueOf(offset2));
    });
    StoreActions storeActions = TransactionalStateTaskRestoreManager.getStoreActions(mockTaskModel, mockStoreEngines, mockStoreChangelogs, mockCheckpointedChangelogOffset, checkpointId, mockCurrentChangelogOffsets, mockSystemAdmins, mockStorageManagerUtil, mockLoggedStoreBaseDir, mockNonLoggedStoreBaseDir, mockConfig, mockClock);
    // ensure that there is nothing to retain or delete
    assertEquals(0, storeActions.storeDirsToDelete.size());
    assertEquals(0, storeActions.storeDirsToRetain.size());
    // ensure that we mark the store for full restore (from current oldest to current newest)
    assertEquals("10", storeActions.storesToRestore.get(store1Name).startingOffset);
    assertEquals("20", storeActions.storesToRestore.get(store1Name).endingOffset);
}

Example 33 with SystemAdmins

use of org.apache.samza.system.SystemAdmins in project samza by apache.

the class TestTransactionalStateTaskRestoreManager method testGetStoreActionsForLoggedNonPersistentStore_FullRestoreIfNullCheckpointedOffsetAndRetainExistingChangelogState.

@Test
public void testGetStoreActionsForLoggedNonPersistentStore_FullRestoreIfNullCheckpointedOffsetAndRetainExistingChangelogState() {
    TaskModel mockTaskModel = mock(TaskModel.class);
    TaskName taskName = new TaskName("Partition 0");
    when(mockTaskModel.getTaskName()).thenReturn(taskName);
    Partition taskChangelogPartition = new Partition(0);
    when(mockTaskModel.getChangelogPartition()).thenReturn(taskChangelogPartition);
    String store1Name = "store1";
    StorageEngine store1Engine = mock(StorageEngine.class);
    StoreProperties mockStore1Properties = mock(StoreProperties.class);
    when(store1Engine.getStoreProperties()).thenReturn(mockStore1Properties);
    when(mockStore1Properties.isLoggedStore()).thenReturn(true);
    // non-persistent store
    when(mockStore1Properties.isPersistedToDisk()).thenReturn(false);
    Map<String, StorageEngine> mockStoreEngines = ImmutableMap.of(store1Name, store1Engine);
    String changelog1SystemName = "system1";
    String changelog1StreamName = "store1Changelog";
    SystemStream changelog1SystemStream = new SystemStream(changelog1SystemName, changelog1StreamName);
    SystemStreamPartition changelog1SSP = new SystemStreamPartition(changelog1SystemStream, taskChangelogPartition);
    SystemStreamPartitionMetadata changelog1SSPMetadata = new SystemStreamPartitionMetadata("0", "10", "11");
    Map<String, SystemStream> mockStoreChangelogs = ImmutableMap.of(store1Name, changelog1SystemStream);
    String changelog1CheckpointedOffset = null;
    CheckpointId checkpointId = CheckpointId.create();
    KafkaStateCheckpointMarker kafkaStateCheckpointMarker = new KafkaStateCheckpointMarker(changelog1SSP, changelog1CheckpointedOffset);
    Map<String, KafkaStateCheckpointMarker> mockCheckpointedChangelogOffset = new HashMap<String, KafkaStateCheckpointMarker>() {

        {
            put(store1Name, kafkaStateCheckpointMarker);
        }
    };
    Map<SystemStreamPartition, SystemStreamPartitionMetadata> mockCurrentChangelogOffsets = ImmutableMap.of(changelog1SSP, changelog1SSPMetadata);
    SystemAdmins mockSystemAdmins = mock(SystemAdmins.class);
    SystemAdmin mockSystemAdmin = mock(SystemAdmin.class);
    when(mockSystemAdmins.getSystemAdmin(changelog1SSP.getSystem())).thenReturn(mockSystemAdmin);
    StorageManagerUtil mockStorageManagerUtil = mock(StorageManagerUtil.class);
    File mockLoggedStoreBaseDir = mock(File.class);
    File mockNonLoggedStoreBaseDir = mock(File.class);
    HashMap<String, String> configMap = new HashMap<>();
    configMap.put(TaskConfig.TRANSACTIONAL_STATE_RETAIN_EXISTING_STATE, "true");
    Config mockConfig = new MapConfig(configMap);
    Clock mockClock = mock(Clock.class);
    Mockito.when(mockSystemAdmin.offsetComparator(anyString(), anyString())).thenAnswer((Answer<Integer>) invocation -> {
        String offset1 = (String) invocation.getArguments()[0];
        String offset2 = (String) invocation.getArguments()[1];
        return Long.valueOf(offset1).compareTo(Long.valueOf(offset2));
    });
    StoreActions storeActions = TransactionalStateTaskRestoreManager.getStoreActions(mockTaskModel, mockStoreEngines, mockStoreChangelogs, mockCheckpointedChangelogOffset, checkpointId, mockCurrentChangelogOffsets, mockSystemAdmins, mockStorageManagerUtil, mockLoggedStoreBaseDir, mockNonLoggedStoreBaseDir, mockConfig, mockClock);
    // ensure that there is nothing to delete or retain
    assertEquals(0, storeActions.storeDirsToDelete.size());
    assertEquals(0, storeActions.storeDirsToRetain.size());
    // ensure that we mark the store for restore (full trim == restore from oldest to null)
    assertEquals("0", storeActions.storesToRestore.get(store1Name).startingOffset);
    assertEquals("10", storeActions.storesToRestore.get(store1Name).endingOffset);
}

Example 34 with SystemAdmins

use of org.apache.samza.system.SystemAdmins in project samza by apache.

the class TestTransactionalStateTaskRestoreManager method testGetStoreActionsForLoggedPersistentStore_RestoreDeltaIfStaleStoreCheckpoint.

@Test
public void testGetStoreActionsForLoggedPersistentStore_RestoreDeltaIfStaleStoreCheckpoint() {
    TaskModel mockTaskModel = mock(TaskModel.class);
    TaskName taskName = new TaskName("Partition 0");
    when(mockTaskModel.getTaskName()).thenReturn(taskName);
    Partition taskChangelogPartition = new Partition(0);
    when(mockTaskModel.getChangelogPartition()).thenReturn(taskChangelogPartition);
    String store1Name = "store1";
    StorageEngine store1Engine = mock(StorageEngine.class);
    StoreProperties mockStore1Properties = mock(StoreProperties.class);
    when(store1Engine.getStoreProperties()).thenReturn(mockStore1Properties);
    when(mockStore1Properties.isLoggedStore()).thenReturn(true);
    when(mockStore1Properties.isPersistedToDisk()).thenReturn(true);
    Map<String, StorageEngine> mockStoreEngines = ImmutableMap.of(store1Name, store1Engine);
    String changelog1SystemName = "system1";
    String changelog1StreamName = "store1Changelog";
    SystemStream changelog1SystemStream = new SystemStream(changelog1SystemName, changelog1StreamName);
    SystemStreamPartition changelog1SSP = new SystemStreamPartition(changelog1SystemStream, taskChangelogPartition);
    SystemStreamPartitionMetadata changelog1SSPMetadata = new SystemStreamPartitionMetadata("0", "10", "11");
    Map<String, SystemStream> mockStoreChangelogs = ImmutableMap.of(store1Name, changelog1SystemStream);
    String changelog1CheckpointedOffset = "5";
    CheckpointId checkpointId = CheckpointId.create();
    KafkaStateCheckpointMarker kafkaStateCheckpointMarker = new KafkaStateCheckpointMarker(changelog1SSP, changelog1CheckpointedOffset);
    ImmutableMap<String, KafkaStateCheckpointMarker> mockCheckpointedChangelogOffset = ImmutableMap.of(store1Name, kafkaStateCheckpointMarker);
    Map<SystemStreamPartition, SystemStreamPartitionMetadata> mockCurrentChangelogOffsets = ImmutableMap.of(changelog1SSP, changelog1SSPMetadata);
    SystemAdmins mockSystemAdmins = mock(SystemAdmins.class);
    SystemAdmin mockSystemAdmin = mock(SystemAdmin.class);
    when(mockSystemAdmins.getSystemAdmin(changelog1SSP.getSystem())).thenReturn(mockSystemAdmin);
    StorageManagerUtil mockStorageManagerUtil = mock(StorageManagerUtil.class);
    File mockLoggedStoreBaseDir = mock(File.class);
    File mockNonLoggedStoreBaseDir = mock(File.class);
    Config mockConfig = mock(Config.class);
    Clock mockClock = mock(Clock.class);
    File mockCurrentStoreDir = mock(File.class);
    File mockStoreNewerCheckpointDir = mock(File.class);
    String newerCheckpointDirLocalOffset = "4";
    File mockStoreOlderCheckpointDir = mock(File.class);
    String olderCheckpointDirLocalOffset = "3";
    when(mockStorageManagerUtil.getTaskStoreDir(eq(mockLoggedStoreBaseDir), eq(store1Name), eq(taskName), any())).thenReturn(mockCurrentStoreDir);
    when(mockStorageManagerUtil.getTaskStoreCheckpointDirs(eq(mockLoggedStoreBaseDir), eq(store1Name), eq(taskName), any())).thenReturn(ImmutableList.of(mockStoreNewerCheckpointDir, mockStoreOlderCheckpointDir));
    when(mockStorageManagerUtil.isLoggedStoreValid(eq(store1Name), eq(mockStoreNewerCheckpointDir), any(), eq(mockStoreChangelogs), eq(mockTaskModel), any(), eq(mockStoreEngines))).thenReturn(true);
    when(mockStorageManagerUtil.isLoggedStoreValid(eq(store1Name), eq(mockStoreOlderCheckpointDir), any(), eq(mockStoreChangelogs), eq(mockTaskModel), any(), eq(mockStoreEngines))).thenReturn(true);
    Set<SystemStreamPartition> mockChangelogSSPs = ImmutableSet.of(changelog1SSP);
    when(mockStorageManagerUtil.readOffsetFile(eq(mockStoreNewerCheckpointDir), eq(mockChangelogSSPs), eq(false))).thenReturn(ImmutableMap.of(changelog1SSP, newerCheckpointDirLocalOffset));
    when(mockStorageManagerUtil.readOffsetFile(eq(mockStoreOlderCheckpointDir), eq(mockChangelogSSPs), eq(false))).thenReturn(// less than checkpointed offset (5)
    ImmutableMap.of(changelog1SSP, olderCheckpointDirLocalOffset));
    Mockito.when(mockSystemAdmin.offsetComparator(anyString(), anyString())).thenAnswer((Answer<Integer>) invocation -> {
        String offset1 = (String) invocation.getArguments()[0];
        String offset2 = (String) invocation.getArguments()[1];
        return Long.valueOf(offset1).compareTo(Long.valueOf(offset2));
    });
    StoreActions storeActions = TransactionalStateTaskRestoreManager.getStoreActions(mockTaskModel, mockStoreEngines, mockStoreChangelogs, mockCheckpointedChangelogOffset, checkpointId, mockCurrentChangelogOffsets, mockSystemAdmins, mockStorageManagerUtil, mockLoggedStoreBaseDir, mockNonLoggedStoreBaseDir, mockConfig, mockClock);
    // ensure that both the current dir and older stale checkpoint dir are marked for deletion
    assertEquals(2, storeActions.storeDirsToDelete.get(store1Name).size());
    assertTrue(storeActions.storeDirsToDelete.get(store1Name).contains(mockCurrentStoreDir));
    assertTrue(storeActions.storeDirsToDelete.get(store1Name).contains(mockStoreOlderCheckpointDir));
    // ensure that the newer (but still stale) store checkpoint is marked for retention
    assertEquals(mockStoreNewerCheckpointDir, storeActions.storeDirsToRetain.get(store1Name));
    // ensure that we mark the store for restore from newer (but still stale) local offset to checkpointed offset
    assertEquals(newerCheckpointDirLocalOffset, storeActions.storesToRestore.get(store1Name).startingOffset);
    assertEquals(changelog1CheckpointedOffset, storeActions.storesToRestore.get(store1Name).endingOffset);
}

Example 35 with SystemAdmins

use of org.apache.samza.system.SystemAdmins in project samza by apache.

the class TestTransactionalStateTaskRestoreManager method testGetStoreActionsForLoggedPersistentStore_FullRestoreIfNullCheckpointedAndOldestOffset.

/**
 * This can be the case if the changelog topic is empty (although KafkaSystemAdmin returns 0 as the oldest offset
 * instead of null for empty topics).
 */
@Test
public void testGetStoreActionsForLoggedPersistentStore_FullRestoreIfNullCheckpointedAndOldestOffset() {
    // full restore == clear existing state
    TaskModel mockTaskModel = mock(TaskModel.class);
    TaskName taskName = new TaskName("Partition 0");
    when(mockTaskModel.getTaskName()).thenReturn(taskName);
    Partition taskChangelogPartition = new Partition(0);
    when(mockTaskModel.getChangelogPartition()).thenReturn(taskChangelogPartition);
    String store1Name = "store1";
    StorageEngine store1Engine = mock(StorageEngine.class);
    StoreProperties mockStore1Properties = mock(StoreProperties.class);
    when(store1Engine.getStoreProperties()).thenReturn(mockStore1Properties);
    when(mockStore1Properties.isLoggedStore()).thenReturn(true);
    when(mockStore1Properties.isPersistedToDisk()).thenReturn(true);
    Map<String, StorageEngine> mockStoreEngines = ImmutableMap.of(store1Name, store1Engine);
    String changelog1SystemName = "system1";
    String changelog1StreamName = "store1Changelog";
    SystemStream changelog1SystemStream = new SystemStream(changelog1SystemName, changelog1StreamName);
    SystemStreamPartition changelog1SSP = new SystemStreamPartition(changelog1SystemStream, taskChangelogPartition);
    // SSPMetadata contract allows for (and recommends) null as the oldest offset for empty streams.
    // KafkaSystemAdmin does not follow this convention and returns 0 instead, but we should test for this
    SystemStreamPartitionMetadata changelog1SSPMetadata = new SystemStreamPartitionMetadata(null, null, null);
    Map<String, SystemStream> mockStoreChangelogs = ImmutableMap.of(store1Name, changelog1SystemStream);
    String changelog1CheckpointedOffset = null;
    CheckpointId checkpointId = CheckpointId.create();
    KafkaStateCheckpointMarker kafkaStateCheckpointMarker = new KafkaStateCheckpointMarker(changelog1SSP, changelog1CheckpointedOffset);
    Map<String, KafkaStateCheckpointMarker> mockCheckpointedChangelogOffset = new HashMap<String, KafkaStateCheckpointMarker>() {

        {
            put(store1Name, kafkaStateCheckpointMarker);
        }
    };
    Map<SystemStreamPartition, SystemStreamPartitionMetadata> mockCurrentChangelogOffsets = ImmutableMap.of(changelog1SSP, changelog1SSPMetadata);
    SystemAdmins mockSystemAdmins = mock(SystemAdmins.class);
    SystemAdmin mockSystemAdmin = mock(SystemAdmin.class);
    when(mockSystemAdmins.getSystemAdmin(changelog1SSP.getSystem())).thenReturn(mockSystemAdmin);
    StorageManagerUtil mockStorageManagerUtil = mock(StorageManagerUtil.class);
    File mockLoggedStoreBaseDir = mock(File.class);
    File mockNonLoggedStoreBaseDir = mock(File.class);
    HashMap<String, String> configMap = new HashMap<>();
    // should not matter
    configMap.put(TaskConfig.TRANSACTIONAL_STATE_RETAIN_EXISTING_STATE, "true");
    Config mockConfig = new MapConfig(configMap);
    Clock mockClock = mock(Clock.class);
    File mockCurrentStoreDir = mock(File.class);
    File mockStoreNewerCheckpointDir = mock(File.class);
    File mockStoreOlderCheckpointDir = mock(File.class);
    String olderCheckpointDirLocalOffset = "3";
    String newerCheckpointDirLocalOffset = "5";
    when(mockStorageManagerUtil.getTaskStoreDir(eq(mockLoggedStoreBaseDir), eq(store1Name), eq(taskName), any())).thenReturn(mockCurrentStoreDir);
    when(mockStorageManagerUtil.getTaskStoreCheckpointDirs(eq(mockLoggedStoreBaseDir), eq(store1Name), eq(taskName), any())).thenReturn(ImmutableList.of(mockStoreNewerCheckpointDir, mockStoreOlderCheckpointDir));
    when(mockStorageManagerUtil.isLoggedStoreValid(eq(store1Name), eq(mockStoreNewerCheckpointDir), any(), eq(mockStoreChangelogs), eq(mockTaskModel), any(), eq(mockStoreEngines))).thenReturn(true);
    when(mockStorageManagerUtil.isLoggedStoreValid(eq(store1Name), eq(mockStoreOlderCheckpointDir), any(), eq(mockStoreChangelogs), eq(mockTaskModel), any(), eq(mockStoreEngines))).thenReturn(true);
    Set<SystemStreamPartition> mockChangelogSSPs = ImmutableSet.of(changelog1SSP);
    when(mockStorageManagerUtil.readOffsetFile(eq(mockStoreNewerCheckpointDir), eq(mockChangelogSSPs), eq(false))).thenReturn(ImmutableMap.of(changelog1SSP, newerCheckpointDirLocalOffset));
    when(mockStorageManagerUtil.readOffsetFile(eq(mockStoreOlderCheckpointDir), eq(mockChangelogSSPs), eq(false))).thenReturn(// less than checkpointed offset (5)
    ImmutableMap.of(changelog1SSP, olderCheckpointDirLocalOffset));
    Mockito.when(mockSystemAdmin.offsetComparator(anyString(), anyString())).thenAnswer((Answer<Integer>) invocation -> {
        String offset1 = (String) invocation.getArguments()[0];
        String offset2 = (String) invocation.getArguments()[1];
        if (offset1 == null || offset2 == null) {
            return -1;
        }
        return Long.valueOf(offset1).compareTo(Long.valueOf(offset2));
    });
    StoreActions storeActions = TransactionalStateTaskRestoreManager.getStoreActions(mockTaskModel, mockStoreEngines, mockStoreChangelogs, mockCheckpointedChangelogOffset, checkpointId, mockCurrentChangelogOffsets, mockSystemAdmins, mockStorageManagerUtil, mockLoggedStoreBaseDir, mockNonLoggedStoreBaseDir, mockConfig, mockClock);
    // ensure that all the store dirs (current or checkpoint) are marked for deletion
    assertEquals(3, storeActions.storeDirsToDelete.get(store1Name).size());
    assertTrue(storeActions.storeDirsToDelete.get(store1Name).contains(mockCurrentStoreDir));
    assertTrue(storeActions.storeDirsToDelete.get(store1Name).contains(mockStoreOlderCheckpointDir));
    assertTrue(storeActions.storeDirsToDelete.get(store1Name).contains(mockStoreNewerCheckpointDir));
    // ensure that no directories are retained
    assertEquals(0, storeActions.storeDirsToRetain.size());
    // ensure that we do a full restore (on the empty topic)
    assertNull(storeActions.storesToRestore.get(store1Name).startingOffset);
    assertNull(storeActions.storesToRestore.get(store1Name).endingOffset);
}