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.cassandra.sidecar.handlers.sstableuploads;
  
  import java.nio.file.NoSuchFileException;
  import java.util.Collections;
  import java.util.Set;
  
  import com.google.inject.Inject;
  import io.netty.handler.codec.http.HttpResponseStatus;
  import io.vertx.core.http.HttpServerRequest;
  import io.vertx.core.net.SocketAddress;
  import io.vertx.ext.auth.authorization.Authorization;
  import io.vertx.ext.web.RoutingContext;
  import org.apache.cassandra.sidecar.acl.authorization.BasicPermissions;
  import org.apache.cassandra.sidecar.concurrent.ExecutorPools;
  import org.apache.cassandra.sidecar.handlers.AbstractHandler;
  import org.apache.cassandra.sidecar.handlers.AccessProtected;
  import org.apache.cassandra.sidecar.utils.InstanceMetadataFetcher;
  import org.apache.cassandra.sidecar.utils.SSTableUploadsPathBuilder;
  import org.jetbrains.annotations.NotNull;
  
  /**
   * Manages cleaning up uploaded SSTables
   */
  public class SSTableCleanupHandler extends AbstractHandler<String> implements AccessProtected
  {
      private static final String UPLOAD_ID_PARAM = "uploadId";
      private final SSTableUploadsPathBuilder uploadPathBuilder;
  
      /**
       * Constructs a handler with the provided {@code metadataFetcher}
       *
       * @param metadataFetcher   the instance metadata fetcher
       * @param uploadPathBuilder a class that provides SSTableUploads directories
       * @param executorPools     executor pools for blocking executions
       */
      @Inject
      protected SSTableCleanupHandler(InstanceMetadataFetcher metadataFetcher,
                                      SSTableUploadsPathBuilder uploadPathBuilder,
                                      ExecutorPools executorPools)
      {
          super(metadataFetcher, executorPools, null);
          this.uploadPathBuilder = uploadPathBuilder;
      }
  
      @Override
      public Set<Authorization> requiredAuthorizations()
      {
          return Collections.singleton(BasicPermissions.DELETE_STAGED_SSTABLE.toAuthorization());
      }
  
      /**
       * Handles cleaning up the SSTable upload staging directory
       *
       * @param context the context for the handler
       */
      @Override
      public void handleInternal(RoutingContext context,
                                 HttpServerRequest httpRequest,
                                 @NotNull String host,
                                 SocketAddress remoteAddress,
                                 String uploadId)
      {
          uploadPathBuilder.resolveUploadIdDirectory(host, uploadId)
                           .compose(uploadPathBuilder::isValidDirectory)
                           .compose(stagingDirectory -> context.vertx()
                                                               .fileSystem()
                                                               .deleteRecursive(stagingDirectory, true))
                           .onSuccess(x -> context.response().end())
                           .onFailure(cause -> {
                               if (cause instanceof NoSuchFileException)
                               {
                                   logger.warn("Upload directory not found. uploadId={}, remoteAddress={}, instance={}",
                                               uploadId, remoteAddress, host, cause);
                                   context.fail(HttpResponseStatus.NOT_FOUND.code());
                               }
                               else if (cause instanceof IllegalArgumentException)
                               {
                                   context.fail(HttpResponseStatus.BAD_REQUEST.code(), cause);
                               }
                               else
                               {
                                   logger.error("Unable to cleanup upload. uploadId={}, remoteAddress={}, instance={}",
                                                uploadId, remoteAddress, host, cause);
                                   context.fail(HttpResponseStatus.INTERNAL_SERVER_ERROR.code());
                               }
                           });
      }
  
      @Override
      protected String extractParamsOrThrow(RoutingContext context)
      {
          // The route registration guarantees the uploadId path exist
          return context.pathParam(UPLOAD_ID_PARAM);
      }
  }
  