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.livemigration;
  
  import java.util.Set;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  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.exceptions.LiveMigrationExceptions.LiveMigrationTaskNotFoundException;
  import org.apache.cassandra.sidecar.handlers.AbstractHandler;
  import org.apache.cassandra.sidecar.handlers.AccessProtected;
  import org.apache.cassandra.sidecar.livemigration.DataCopyTaskManager;
  import org.apache.cassandra.sidecar.livemigration.LiveMigrationTask;
  import org.apache.cassandra.sidecar.utils.CassandraInputValidator;
  import org.apache.cassandra.sidecar.utils.InstanceMetadataFetcher;
  import org.jetbrains.annotations.NotNull;
  
  import static org.apache.cassandra.sidecar.utils.HttpExceptions.wrapHttpException;
  
  /**
   * Handler that retrieves the status and details of a specific data copy task in the live migration process.
   * This handler processes GET requests for a particular live migration task by its unique task ID.
   */
  public class LiveMigrationGetDataCopyTaskHandler extends AbstractHandler<String> implements AccessProtected
  {
      private static final Logger LOGGER = LoggerFactory.getLogger(LiveMigrationGetDataCopyTaskHandler.class);
      private final DataCopyTaskManager dataCopyTaskManager;
  
      @Inject
      public LiveMigrationGetDataCopyTaskHandler(InstanceMetadataFetcher metadataFetcher,
                                                 ExecutorPools executorPools,
                                                 CassandraInputValidator validator,
                                                 DataCopyTaskManager dataCopyTaskManager)
      {
          super(metadataFetcher, executorPools, validator);
          this.dataCopyTaskManager = dataCopyTaskManager;
      }
  
      @Override
      protected String extractParamsOrThrow(RoutingContext context)
      {
          return context.pathParam("taskId");
      }
  
      @Override
      protected void handleInternal(RoutingContext context,
                                    HttpServerRequest httpRequest,
                                    @NotNull String host,
                                    SocketAddress remoteAddress,
                                    String taskId)
      {
          try
          {
              LiveMigrationTask task = dataCopyTaskManager.getTask(taskId, host);
              LOGGER.info("Found the live migration task with id={}", taskId);
              context.json(task.getResponse());
          }
          catch (LiveMigrationTaskNotFoundException e)
          {
              LOGGER.warn("Could not find live migration data copy task with id={}", taskId);
              context.fail(wrapHttpException(HttpResponseStatus.NOT_FOUND, e.getMessage(), e));
          }
      }
  
      @Override
      public Set<Authorization> requiredAuthorizations()
      {
          return Set.of(BasicPermissions.STREAM_FILES.toAuthorization());
      }
  }
  