| /* |
| * 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 |
| * <p> |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * <p> |
| * 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.recon.spi; |
| |
| import java.io.IOException; |
| import java.util.Map; |
| import java.util.UUID; |
| |
| import org.apache.hadoop.hdds.annotation.InterfaceStability; |
| import org.apache.hadoop.ozone.recon.api.types.ContainerKeyPrefix; |
| import org.apache.hadoop.ozone.recon.api.types.ContainerMetadata; |
| import org.apache.hadoop.hdds.utils.db.TableIterator; |
| import org.apache.hadoop.ozone.recon.scm.ContainerReplicaHistory; |
| |
| /** |
| * The Recon Container DB Service interface. |
| */ |
| @InterfaceStability.Unstable |
| public interface ContainerDBServiceProvider { |
| |
| /* |
| * Close the container DB |
| */ |
| void close() throws Exception; |
| |
| /** |
| * Create new container DB and bulk Store the container to Key prefix |
| * mapping. |
| * @param containerKeyPrefixCounts Map of containerId, key-prefix tuple to |
| * key count. |
| */ |
| void initNewContainerDB(Map<ContainerKeyPrefix, Integer> |
| containerKeyPrefixCounts) |
| throws IOException; |
| |
| /** |
| * Store the container to Key prefix mapping into the Recon Container DB. |
| * |
| * @param containerKeyPrefix the containerId, key-prefix tuple. |
| * @param count Count of Keys with that prefix. |
| */ |
| void storeContainerKeyMapping(ContainerKeyPrefix containerKeyPrefix, |
| Integer count) throws IOException; |
| |
| /** |
| * Store the containerID -> no. of keys count into the container DB store. |
| * |
| * @param containerID the containerID. |
| * @param count count of the keys within the given containerID. |
| * @throws IOException |
| */ |
| void storeContainerKeyCount(Long containerID, Long count) throws IOException; |
| |
| /** |
| * Store the containerID -> ContainerReplicaWithTimestamp mapping to the |
| * container DB store. |
| * |
| * @param containerID the containerID. |
| * @param tsMap A map from datanode UUID to ContainerReplicaWithTimestamp. |
| * @throws IOException |
| */ |
| void storeContainerReplicaHistory(Long containerID, |
| Map<UUID, ContainerReplicaHistory> tsMap) throws IOException; |
| |
| /** |
| * Batch version of storeContainerReplicaHistory. |
| * |
| * @param replicaHistoryMap Replica history map |
| * @throws IOException |
| */ |
| void batchStoreContainerReplicaHistory( |
| Map<Long, Map<UUID, ContainerReplicaHistory>> replicaHistoryMap) |
| throws IOException; |
| |
| /** |
| * Store the total count of containers into the container DB store. |
| * |
| * @param count count of the containers present in the system. |
| */ |
| void storeContainerCount(Long count); |
| |
| /** |
| * Get the stored key prefix count for the given containerID, key prefix. |
| * |
| * @param containerKeyPrefix the containerID, key-prefix tuple. |
| * @return count of keys with that prefix. |
| */ |
| Integer getCountForContainerKeyPrefix( |
| ContainerKeyPrefix containerKeyPrefix) throws IOException; |
| |
| /** |
| * Get the total count of keys within the given containerID. |
| * |
| * @param containerID the given containerId. |
| * @return count of keys within the given containerID. |
| * @throws IOException |
| */ |
| long getKeyCountForContainer(Long containerID) throws IOException; |
| |
| /** |
| * Get the container replica history of the given containerID. |
| * |
| * @param containerID the given containerId. |
| * @return A map of ContainerReplicaWithTimestamp of the given containerID. |
| * @throws IOException |
| */ |
| Map<UUID, ContainerReplicaHistory> getContainerReplicaHistory( |
| Long containerID) throws IOException; |
| |
| /** |
| * Get if a containerID exists or not. |
| * |
| * @param containerID the given containerID. |
| * @return if the given ContainerID exists or not. |
| * @throws IOException |
| */ |
| boolean doesContainerExists(Long containerID) throws IOException; |
| |
| /** |
| * Get the stored key prefixes for the given containerId. |
| * |
| * @param containerId the given containerId. |
| * @return Map of Key prefix -> count. |
| */ |
| Map<ContainerKeyPrefix, Integer> getKeyPrefixesForContainer( |
| long containerId) throws IOException; |
| |
| /** |
| * Get the stored key prefixes for the given containerId starting |
| * after the given keyPrefix. |
| * |
| * @param containerId the given containerId. |
| * @param prevKeyPrefix the key prefix to seek to and start scanning. |
| * @return Map of Key prefix -> count. |
| */ |
| Map<ContainerKeyPrefix, Integer> getKeyPrefixesForContainer( |
| long containerId, String prevKeyPrefix) throws IOException; |
| |
| /** |
| * Get a Map of containerID, containerMetadata of Containers only for the |
| * given limit. If the limit is -1 or any integer <0, then return all |
| * the containers without any limit. |
| * |
| * @param limit the no. of containers to fetch. |
| * @param prevContainer containerID after which the results are returned. |
| * @return Map of containerID -> containerMetadata. |
| * @throws IOException |
| */ |
| Map<Long, ContainerMetadata> getContainers(int limit, long prevContainer) |
| throws IOException; |
| |
| /** |
| * Delete an entry in the container DB. |
| * |
| * @param containerKeyPrefix container key prefix to be deleted. |
| * @throws IOException exception. |
| */ |
| void deleteContainerMapping(ContainerKeyPrefix containerKeyPrefix) |
| throws IOException; |
| |
| /** |
| * Get iterator to the entire container DB. |
| * @return TableIterator |
| */ |
| TableIterator getContainerTableIterator() throws IOException; |
| |
| /** |
| * Get the total count of containers present in the system. |
| * |
| * @return total count of containers. |
| * @throws IOException |
| */ |
| long getCountForContainers() throws IOException; |
| |
| /** |
| * Increment the total count for containers in the system by the given count. |
| * |
| * @param count no. of new containers to add to containers total count. |
| */ |
| void incrementContainerCountBy(long count); |
| |
| } |