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/**
* 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.hadoop.ozone.container.common.interfaces;
import org.apache.hadoop.hdds.scm.container.common.helpers
.StorageContainerException;
import org.apache.hadoop.ozone.container.common.helpers.ContainerData;
import org.apache.hadoop.ozone.container.common.impl.ContainerStatus;
import java.util.List;
import java.util.Map;
/**
* This interface is used for choosing desired containers for
* block deletion.
*/
public interface ContainerDeletionChoosingPolicy {
/**
* Chooses desired containers for block deletion.
* @param count
* how many to return
* @param candidateContainers
* candidate containers collection
* @return container data list
* @throws StorageContainerException
*/
List<ContainerData> chooseContainerForBlockDeletion(int count,
Map<String, ContainerStatus> candidateContainers)
throws StorageContainerException;
}
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