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;
  
  import java.util.Collections;
  import java.util.Set;
  
  import com.datastax.driver.core.Metadata;
  import com.google.inject.Inject;
  import com.google.inject.Singleton;
  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.datahub.SchemaReporter;
  import org.apache.cassandra.sidecar.utils.InstanceMetadataFetcher;
  import org.jetbrains.annotations.NotNull;
  import org.jetbrains.annotations.Nullable;
  
  import static org.apache.cassandra.sidecar.modules.ApiModule.OK_STATUS;
  
  /**
   * An implementation of {@link AbstractHandler} used to trigger an immediate,
   * synchronous conversion and report of the current schema
   */
  @Singleton
  public class ReportSchemaHandler extends AbstractHandler<Void> implements AccessProtected
  {
      @NotNull
      private final SchemaReporter schemaReporter;
  
      /**
       * Constructs a new instance of {@link ReportSchemaHandler} using the provided instances
       * of {@link InstanceMetadataFetcher}, {@link ExecutorPools}, and {@link SchemaReporter}
       *
       * @param metadata the metadata fetcher
       * @param executor executor pools for blocking executions
       * @param reporter schema reporter to use for the conversion
       */
      @Inject
      public ReportSchemaHandler(@NotNull InstanceMetadataFetcher metadata,
                                 @NotNull ExecutorPools executor,
                                 @NotNull SchemaReporter reporter)
      {
          super(metadata, executor, null);
  
          schemaReporter = reporter;
      }
  
      /**
       * {@inheritDoc}
       */
      @Override
      @NotNull
      public Set<Authorization> requiredAuthorizations()
      {
          return Collections.singleton(BasicPermissions.REPORT_SCHEMA.toAuthorization());
      }
  
      /**
       * {@inheritDoc}
       */
      @Override
      @Nullable
      protected Void extractParamsOrThrow(@NotNull RoutingContext context)
      {
          return null;
      }
  
      /**
       * {@inheritDoc}
       */
      @Override
      protected void handleInternal(@NotNull RoutingContext context,
                                    @NotNull HttpServerRequest http,
                                    @NotNull String host,
                                    @NotNull SocketAddress address,
                                    @Nullable Void request)
      {
          Metadata metadata = metadataFetcher.callOnFirstAvailableInstance(instance -> instance.delegate().metadata());
  
          executorPools.service()
                       .runBlocking(() -> schemaReporter.processRequested(metadata))
                       .onSuccess(ignored -> context.json(OK_STATUS))
                       .onFailure(throwable -> processFailure(throwable, context, host, address, request));
      }
  }
  