ArafatKhan2198 commented on code in PR #6231: URL: https://github.com/apache/ozone/pull/6231#discussion_r1590899421
########## hadoop-ozone/recon/src/main/java/org/apache/hadoop/ozone/recon/api/OMDBInsightSearchEndpoint.java: ########## @@ -0,0 +1,457 @@ +/** + * 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.api; + +import org.apache.hadoop.hdds.scm.server.OzoneStorageContainerManager; +import org.apache.hadoop.hdds.utils.db.Table; +import org.apache.hadoop.hdds.utils.db.TableIterator; +import org.apache.hadoop.ozone.OzoneConsts; +import org.apache.hadoop.ozone.om.helpers.OmBucketInfo; +import org.apache.hadoop.ozone.om.helpers.OmKeyInfo; +import org.apache.hadoop.ozone.om.helpers.BucketLayout; +import org.apache.hadoop.ozone.recon.api.handlers.BucketHandler; +import org.apache.hadoop.ozone.recon.api.types.KeyEntityInfo; +import org.apache.hadoop.ozone.recon.api.types.KeyInsightInfoResponse; +import org.apache.hadoop.ozone.recon.api.types.NSSummary; +import org.apache.hadoop.ozone.recon.recovery.ReconOMMetadataManager; +import org.apache.hadoop.ozone.recon.spi.impl.ReconNamespaceSummaryManagerImpl; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +import javax.inject.Inject; +import javax.ws.rs.DefaultValue; +import javax.ws.rs.GET; +import javax.ws.rs.Path; +import javax.ws.rs.QueryParam; +import javax.ws.rs.Produces; +import javax.ws.rs.core.MediaType; +import javax.ws.rs.core.Response; +import java.io.IOException; +import java.util.Map; +import java.util.LinkedHashMap; +import java.util.List; +import java.util.ArrayList; +import java.util.Set; + +import static org.apache.hadoop.ozone.OzoneConsts.OM_KEY_PREFIX; +import static org.apache.hadoop.ozone.recon.ReconConstants.*; +import static org.apache.hadoop.ozone.recon.api.handlers.BucketHandler.getBucketHandler; +import static org.apache.hadoop.ozone.recon.api.handlers.EntityHandler.normalizePath; +import static org.apache.hadoop.ozone.recon.api.handlers.EntityHandler.parseRequestPath; + +/** + * REST endpoint for search implementation in OM DB Insight. + */ +@Path("/keys") +@Produces(MediaType.APPLICATION_JSON) +@AdminOnly +public class OMDBInsightSearchEndpoint { + + private OzoneStorageContainerManager reconSCM; + private final ReconOMMetadataManager omMetadataManager; + private static final Logger LOG = + LoggerFactory.getLogger(OMDBInsightSearchEndpoint.class); + private ReconNamespaceSummaryManagerImpl reconNamespaceSummaryManager; + + + @Inject + public OMDBInsightSearchEndpoint(OzoneStorageContainerManager reconSCM, + ReconOMMetadataManager omMetadataManager, + ReconNamespaceSummaryManagerImpl reconNamespaceSummaryManager) { + this.reconSCM = reconSCM; + this.omMetadataManager = omMetadataManager; + this.reconNamespaceSummaryManager = reconNamespaceSummaryManager; + } + + + /** + * Performs a search for open keys in the Ozone Manager (OM) database using a specified search prefix. + * This endpoint searches across both File System Optimized (FSO) and Object Store (non-FSO) layouts, + * compiling a list of keys that match the given prefix along with their data sizes. + * <p> + * The search prefix may range from the root level ('/') to any specific directory + * or key level (e.g., '/volA/' for everything under 'volA'). The search operation matches + * the prefix against the start of keys' names within the OM DB. + * <p> + * Example Usage: + * 1. A startPrefix of "/" will return all keys in the database. + * 2. A startPrefix of "/volA/" retrieves every key under volume 'volA'. + * 3. Specifying "/volA/bucketA/dir1" focuses the search within 'dir1' inside 'bucketA' of 'volA'. + * + * @param startPrefix The prefix for searching keys, starting from the root ('/') or any specific path. + * @param limit Limits the number of returned keys. + * @return A KeyInsightInfoResponse, containing matching keys and their data sizes. + * @throws IOException On failure to access the OM database or process the operation. + */ + @GET + @Path("/open/search") + public Response searchOpenKeys( + @DefaultValue(DEFAULT_START_PREFIX) @QueryParam("startPrefix") + String startPrefix, + @DefaultValue(RECON_OPEN_KEY_DEFAULT_SEARCH_LIMIT) @QueryParam("limit") + int limit) throws IOException { + try { + limit = Math.max(0, limit); // Ensure limit is non-negative + KeyInsightInfoResponse insightResponse = new KeyInsightInfoResponse(); + long replicatedTotal = 0; + long unreplicatedTotal = 0; + boolean keysFound = false; // Flag to track if any keys are found + + // Search keys from non-FSO layout. + Map<String, OmKeyInfo> obsKeys = new LinkedHashMap<>(); + Table<String, OmKeyInfo> openKeyTable = + omMetadataManager.getOpenKeyTable(BucketLayout.LEGACY); + obsKeys = retrieveKeysFromTable(openKeyTable, startPrefix, limit); + for (Map.Entry<String, OmKeyInfo> entry : obsKeys.entrySet()) { + keysFound = true; + KeyEntityInfo keyEntityInfo = + createKeyEntityInfoFromOmKeyInfo(entry.getKey(), entry.getValue()); + insightResponse.getNonFSOKeyInfoList() + .add(keyEntityInfo); // Add to non-FSO list + replicatedTotal += entry.getValue().getReplicatedSize(); + unreplicatedTotal += entry.getValue().getDataSize(); + } + + // Search keys from FSO layout. + Map<String, OmKeyInfo> fsoKeys = searchOpenKeysInFSO(startPrefix, limit); + for (Map.Entry<String, OmKeyInfo> entry : fsoKeys.entrySet()) { + keysFound = true; + KeyEntityInfo keyEntityInfo = + createKeyEntityInfoFromOmKeyInfo(entry.getKey(), entry.getValue()); + insightResponse.getFsoKeyInfoList() + .add(keyEntityInfo); // Add to FSO list + replicatedTotal += entry.getValue().getReplicatedSize(); + unreplicatedTotal += entry.getValue().getDataSize(); + } + + // If no keys were found, return a response indicating that no keys matched + if (!keysFound) { + return noMatchedKeysResponse(startPrefix); + } + + // Set the aggregated totals in the response + insightResponse.setReplicatedDataSize(replicatedTotal); + insightResponse.setUnreplicatedDataSize(unreplicatedTotal); + + return Response.ok(insightResponse).build(); + } catch (IOException e) { + return createInternalServerErrorResponse( + "Error searching open keys in OM DB: " + e.getMessage()); + } catch (IllegalArgumentException e) { + return createBadRequestResponse( + "Invalid startPrefix: " + e.getMessage()); + } + } + + public Map<String, OmKeyInfo> searchOpenKeysInFSO(String startPrefix, + int limit) + throws IOException, IllegalArgumentException { + Map<String, OmKeyInfo> matchedKeys = new LinkedHashMap<>(); + // Convert the search prefix to an object path for FSO buckets + String startPrefixObjectPath = convertToObjectPath(startPrefix); + String[] names = parseRequestPath(startPrefixObjectPath); + Table<String, OmKeyInfo> openFileTable = + omMetadataManager.getOpenKeyTable(BucketLayout.FILE_SYSTEM_OPTIMIZED); + + // If names.length > 2, then the search prefix is at the volume or bucket level hence + // no need to find parent or extract id's or find subpaths as the openFileTable is + // suitable for volume and bucket level search + if (names.length > 2) { Review Comment: Thanks for the comment @dombizita For example, consider a key in the Open File Table, such as `volume1/fso-bucket2/dir1/dir2/dir3/file1`. This key is stored in the following format: "`volumeId/bucketId/dir3Id/file1`". Notably, "`dir1`" and "`dir2`" are absent from the RocksDB record key. If a user searches using the prefix "`volume1/fso-bucket2/dir1`", the system must first calculate the object IDs for `volume`, `bucket` & "`dir1`". It must also compute the object IDs for "`dir2`" and "`dir3`" by identifying their subpaths and applying the complex method we have designed. However, if the user simply uses the prefix "`volumeName/bucketName`", the process simplifies significantly. In this case, all we need to do is convert these terms to their respective object IDs and directly search in the RocksDB _Open File Table_ using the `seek()` method, then return the matching records. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. 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