content: /*
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you under the Apache License, Version 2.0 (the
   * "License"); you may not use this file except in compliance
   * with the License.  You may obtain a copy of the License at
   *
   *   http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing,
   * software distributed under the License is distributed on an
   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
   * KIND, either express or implied.  See the License for the
   * specific language governing permissions and limitations
   * under the License.
   */
  
  package org.apache.bifromq.basekv.localengine.rocksdb;
  
  import static org.apache.bifromq.basekv.localengine.rocksdb.AutoCleaner.autoRelease;
  import static org.awaitility.Awaitility.await;
  import static org.testng.Assert.assertEquals;
  import static org.testng.Assert.assertFalse;
  import static org.testng.Assert.assertTrue;
  
  import org.apache.bifromq.basekv.localengine.AbstractKVEngineTest;
  import org.apache.bifromq.basekv.localengine.IKVSpace;
  import org.apache.bifromq.basekv.localengine.TestUtil;
  import com.google.protobuf.ByteString;
  import java.nio.file.Files;
  import java.nio.file.Path;
  import java.util.concurrent.atomic.AtomicBoolean;
  import lombok.SneakyThrows;
  import org.testng.annotations.Test;
  
  public abstract class AbstractRocksDBKVEngineTest extends AbstractKVEngineTest {
      protected Path dbRootDir;
  
      @SneakyThrows
      @Override
      protected void beforeStart() {
          dbRootDir = Files.createTempDirectory("");
      }
  
  
      @Override
      protected void afterStop() {
          TestUtil.deleteDir(dbRootDir.toString());
      }
  
      @Test
      public void identityKeptSame() {
          String identity = engine.id();
          engine.stop();
          engine = newEngine();
          engine.start();
          assertEquals(identity, engine.id());
      }
  
      @Test
      public void loadExistingKeyRange() {
          String rangeId = "test_range1";
          ByteString metaKey = ByteString.copyFromUtf8("metaKey");
          ByteString metaValue = ByteString.copyFromUtf8("metaValue");
          ByteString key = ByteString.copyFromUtf8("key");
          ByteString value = ByteString.copyFromUtf8("value");
          IKVSpace keyRange = engine.createIfMissing(rangeId);
          keyRange.toWriter().put(key, value).metadata(metaKey, metaValue).done();
          assertTrue(keyRange.metadata(metaKey).isPresent());
          assertTrue(keyRange.metadata().blockingFirst().containsKey(metaKey));
          assertTrue(keyRange.exist(key));
          assertEquals(keyRange.get(key).get(), value);
          engine.stop();
  
          engine = newEngine();
          engine.start();
          assertEquals(engine.spaces().size(), 1);
          IKVSpace keyRangeLoaded = engine.spaces().values().stream().findFirst().get();
          assertEquals(keyRangeLoaded.id(), rangeId);
          assertTrue(keyRangeLoaded.metadata(metaKey).isPresent());
          assertTrue(keyRangeLoaded.metadata().blockingFirst().containsKey(metaKey));
          assertTrue(keyRangeLoaded.exist(key));
          assertEquals(keyRangeLoaded.get(key).get(), value);
          // stop again and start
          engine.stop();
  
          engine = newEngine();
          engine.start();
          assertEquals(engine.spaces().size(), 1);
          keyRangeLoaded = engine.spaces().values().stream().findFirst().get();
          assertEquals(keyRangeLoaded.id(), rangeId);
          assertTrue(keyRangeLoaded.metadata(metaKey).isPresent());
          assertTrue(keyRangeLoaded.metadata().blockingFirst().containsKey(metaKey));
          assertTrue(keyRangeLoaded.exist(key));
          assertEquals(keyRangeLoaded.get(key).get(), value);
      }
  
      @Test
      public void flushOnClose() {
          String rangeId = "test_range1";
          ByteString key = ByteString.copyFromUtf8("key");
          ByteString value = ByteString.copyFromUtf8("value");
          IKVSpace keyRange = engine.createIfMissing(rangeId);
          keyRange.toWriter().put(key, value).done();
          engine.stop();
          engine = newEngine();
          engine.start();
          keyRange = engine.createIfMissing(rangeId);
          assertTrue(keyRange.exist(key));
      }
  
      @Test
      public void autoReleaseTest() {
          Object owner = new Object();
          class Closeable implements AutoCloseable {
              AtomicBoolean closed = new AtomicBoolean();
  
              @Override
              public void close() {
                  closed.set(true);
              }
          }
          Closeable closeable = autoRelease(new Closeable(), owner);
          assertFalse(closeable.closed.get());
  
          owner = null;
          await().until(() -> {
              System.gc();
              return closeable.closed.get();
          });
      }
  }
  