/**
* This tests whether the RocksDB backends uses the temp directories that are provided from the
* {@link Environment} when no db storage path is set.
*
* @throws Exception
*/
@Test
public void testUseTempDirectories() throws Exception {
String checkpointPath = tempFolder.newFolder().toURI().toString();
RocksDBStateBackend rocksDbBackend = new RocksDBStateBackend(checkpointPath);
File dir1 = tempFolder.newFolder();
File dir2 = tempFolder.newFolder();
File[] tempDirs = new File[] {dir1, dir2};
assertNull(rocksDbBackend.getDbStoragePaths());
Environment env = getMockEnvironment(tempDirs);
RocksDBKeyedStateBackend<Integer> keyedBackend =
(RocksDBKeyedStateBackend<Integer>)
rocksDbBackend.createKeyedStateBackend(
env,
env.getJobID(),
"test_op",
IntSerializer.INSTANCE,
1,
new KeyGroupRange(0, 0),
env.getTaskKvStateRegistry());
File instanceBasePath = keyedBackend.getInstanceBasePath();
assertThat(
instanceBasePath.getAbsolutePath(),
anyOf(startsWith(dir1.getAbsolutePath()), startsWith(dir2.getAbsolutePath())));
}
@Test
public void testSetDbPath() throws Exception {
String checkpointPath = tempFolder.newFolder().toURI().toString();
File testDir1 = tempFolder.newFolder();
File testDir2 = tempFolder.newFolder();
RocksDBStateBackend rocksDbBackend = new RocksDBStateBackend(checkpointPath);
assertNull(rocksDbBackend.getDbStoragePaths());
rocksDbBackend.setDbStoragePath(testDir1.getAbsolutePath());
assertArrayEquals(
new String[] {testDir1.getAbsolutePath()}, rocksDbBackend.getDbStoragePaths());
rocksDbBackend.setDbStoragePath(null);
assertNull(rocksDbBackend.getDbStoragePaths());
rocksDbBackend.setDbStoragePaths(testDir1.getAbsolutePath(), testDir2.getAbsolutePath());
assertArrayEquals(
new String[] {testDir1.getAbsolutePath(), testDir2.getAbsolutePath()},
rocksDbBackend.getDbStoragePaths());
Environment env = getMockEnvironment(new File[] {});
RocksDBKeyedStateBackend<Integer> keyedBackend =
(RocksDBKeyedStateBackend<Integer>)
rocksDbBackend.createKeyedStateBackend(
env,
env.getJobID(),
"test_op",
IntSerializer.INSTANCE,
1,
new KeyGroupRange(0, 0),
env.getTaskKvStateRegistry());
File instanceBasePath = keyedBackend.getInstanceBasePath();
assertThat(
instanceBasePath.getAbsolutePath(),
anyOf(startsWith(testDir1.getAbsolutePath()), startsWith(testDir2.getAbsolutePath())));
//noinspection NullArgumentToVariableArgMethod
rocksDbBackend.setDbStoragePaths(null);
assertNull(rocksDbBackend.getDbStoragePaths());
}