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.bookkeeper.server.http.service;
  
  import static com.google.common.base.Preconditions.checkNotNull;
  
  import com.google.common.collect.Lists;
  import com.google.common.collect.Sets;
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  import java.util.Set;
  import org.apache.bookkeeper.bookie.LedgerStorage;
  import org.apache.bookkeeper.common.util.JsonUtil;
  import org.apache.bookkeeper.http.HttpServer;
  import org.apache.bookkeeper.http.service.HttpEndpointService;
  import org.apache.bookkeeper.http.service.HttpServiceRequest;
  import org.apache.bookkeeper.http.service.HttpServiceResponse;
  import org.apache.bookkeeper.proto.BookieServer;
  import org.apache.commons.collections4.CollectionUtils;
  import org.apache.commons.lang3.StringUtils;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  
  /**
   * HttpEndpointService that handle force trigger entry location compact requests.
   *
   * <p>The PUT method will trigger entry location compact on current bookie.
   *
   * <p>The GET method will get the entry location compact running or not.
   * Output would be like:
   *        {
   *           "/data1/bookkeeper/ledgers/current/locations" : "false",
   *           "/data2/bookkeeper/ledgers/current/locations" : "true",
   *        }
   */
  
  public class TriggerLocationCompactService implements HttpEndpointService {
  
      static final Logger LOG = LoggerFactory.getLogger(TriggerLocationCompactService.class);
  
      private final BookieServer bookieServer;
      private final List<String> entryLocationDBPath;
  
      public TriggerLocationCompactService(BookieServer bookieServer) {
          this.bookieServer = checkNotNull(bookieServer);
          this.entryLocationDBPath = bookieServer.getBookie().getLedgerStorage().getEntryLocationDBPath();
      }
  
      @Override
      public HttpServiceResponse handle(HttpServiceRequest request) throws Exception {
          HttpServiceResponse response = new HttpServiceResponse();
          LedgerStorage ledgerStorage = bookieServer.getBookie().getLedgerStorage();
  
          if (HttpServer.Method.PUT.equals(request.getMethod())) {
              String requestBody = request.getBody();
              String output = "Not trigger Entry Location RocksDB compact.";
  
              if (StringUtils.isBlank(requestBody)) {
                  output = "Empty request body";
                  response.setBody(output);
                  response.setCode(HttpServer.StatusCode.BAD_REQUEST);
                  return response;
              }
  
              try {
                  @SuppressWarnings("unchecked")
                  Map<String, Object> configMap = JsonUtil.fromJson(requestBody, HashMap.class);
                  Boolean isEntryLocationCompact = (Boolean) configMap
                          .getOrDefault("entryLocationRocksDBCompact", false);
                  String entryLocations = (String) configMap.getOrDefault("entryLocations", "");
  
                  if (!isEntryLocationCompact) {
                      // If entryLocationRocksDBCompact is false, doing nothing.
                      response.setBody(output);
                      response.setCode(HttpServer.StatusCode.OK);
                      return response;
                  }
                  if (StringUtils.isNotBlank(entryLocations)) {
                      // Specified trigger RocksDB compact entryLocations.
                      Set<String> locations = Sets.newHashSet(entryLocations.trim().split(","));
                      if (CollectionUtils.isSubCollection(locations, entryLocationDBPath)) {
                          ledgerStorage.entryLocationCompact(Lists.newArrayList(locations));
                          output = String.format("Triggered entry Location RocksDB: %s compact on bookie:%s.",
                                  entryLocations, bookieServer.getBookieId());
                          response.setCode(HttpServer.StatusCode.OK);
                      } else {
                          output = String.format("Specified trigger compact entryLocations: %s is invalid. "
                                  + "Bookie entry location RocksDB path: %s.", entryLocations, entryLocationDBPath);
                          response.setCode(HttpServer.StatusCode.BAD_REQUEST);
                      }
                  } else {
                      // Not specified trigger compact entryLocations, trigger compact for all entry location.
                      ledgerStorage.entryLocationCompact();
                      output = "Triggered entry Location RocksDB compact on bookie:" + bookieServer.getBookieId();
                      response.setCode(HttpServer.StatusCode.OK);
                  }
              } catch (JsonUtil.ParseJsonException ex) {
                  output = ex.getMessage();
                  response.setCode(HttpServer.StatusCode.BAD_REQUEST);
                  LOG.warn("Trigger entry location index RocksDB compact failed, caused by: " + ex.getMessage());
              }
  
              String jsonResponse = JsonUtil.toJson(output);
              if (LOG.isDebugEnabled()) {
                  LOG.debug("output body:" + jsonResponse);
              }
              response.setBody(jsonResponse);
              return response;
          } else if (HttpServer.Method.GET == request.getMethod()) {
              Map<String, Boolean> compactStatus = ledgerStorage.isEntryLocationCompacting(entryLocationDBPath);
              String jsonResponse = JsonUtil.toJson(compactStatus);
              if (LOG.isDebugEnabled()) {
                  LOG.debug("output body:" + jsonResponse);
              }
              response.setBody(jsonResponse);
              response.setCode(HttpServer.StatusCode.OK);
              return response;
          } else {
              response.setCode(HttpServer.StatusCode.METHOD_NOT_ALLOWED);
              response.setBody("Not found method. Should be PUT to trigger entry location compact,"
                      + " Or GET to get entry location compact state.");
              return response;
          }
      }
  }