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.kafka.tiered.storage.actions;
  
  import org.apache.kafka.common.TopicPartition;
  import org.apache.kafka.server.log.remote.storage.LocalTieredStorageSnapshot;
  import org.apache.kafka.test.TestUtils;
  import org.apache.kafka.tiered.storage.TieredStorageTestAction;
  import org.apache.kafka.tiered.storage.TieredStorageTestContext;
  
  import java.io.PrintStream;
  
  public final class ExpectEmptyRemoteStorageAction implements TieredStorageTestAction {
  
      private final TopicPartition topicPartition;
  
      public ExpectEmptyRemoteStorageAction(TopicPartition topicPartition) {
          this.topicPartition = topicPartition;
      }
  
      @Override
      public void doExecute(TieredStorageTestContext context) throws InterruptedException {
          TestUtils.waitForCondition(() -> {
              LocalTieredStorageSnapshot snapshot = context.takeTieredStorageSnapshot();
              // We don't differentiate the case between segment deletion and topic deletion so the underlying
              // remote-storage-manager (RSM) doesn't know when to remove any topic-level marker files/folders.
              // In case of LocalTieredStorage (RSM), there will be empty partition directories.
              // With KAFKA-15166, the RSM will be able to delete the topic-level marker folders, then the
              // `LocalTieredStorageSnapshot` should not contain the partition directories.
              return snapshot.getFilesets(topicPartition).isEmpty();
          }, 2000L, "Remote storage is not empty for " + topicPartition);
      }
  
      @Override
      public void describe(PrintStream output) {
          output.println("expect-empty-remote-storage topic-partition: " + topicPartition);
      }
  }
  