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.bifromq.apiserver.http.handler;
  
  import static io.netty.handler.codec.http.HttpResponseStatus.OK;
  
  import com.fasterxml.jackson.databind.ObjectMapper;
  import com.fasterxml.jackson.databind.node.ArrayNode;
  import io.netty.buffer.Unpooled;
  import io.netty.handler.codec.http.DefaultFullHttpResponse;
  import io.netty.handler.codec.http.FullHttpRequest;
  import io.netty.handler.codec.http.FullHttpResponse;
  import io.swagger.v3.oas.annotations.Operation;
  import io.swagger.v3.oas.annotations.Parameter;
  import io.swagger.v3.oas.annotations.Parameters;
  import io.swagger.v3.oas.annotations.enums.ParameterIn;
  import io.swagger.v3.oas.annotations.media.Content;
  import io.swagger.v3.oas.annotations.media.Schema;
  import io.swagger.v3.oas.annotations.parameters.RequestBody;
  import io.swagger.v3.oas.annotations.responses.ApiResponse;
  import io.swagger.v3.oas.annotations.responses.ApiResponses;
  import jakarta.ws.rs.GET;
  import jakarta.ws.rs.Path;
  import java.util.Set;
  import java.util.concurrent.CompletableFuture;
  import org.apache.bifromq.apiserver.http.handler.utils.JSONUtils;
  import org.apache.bifromq.baserpc.trafficgovernor.IRPCServiceTrafficService;
  
  @Path("/services")
  final class ListAllServicesHandler extends AbstractTrafficRulesHandler {
  
      ListAllServicesHandler(IRPCServiceTrafficService trafficService) {
          super(trafficService);
      }
  
      @GET
      @Operation(summary = "List the name of services in BifroMQ cluster")
      @Parameters({
          @Parameter(name = "req_id",
              in = ParameterIn.HEADER,
              description = "optional caller provided request id",
              schema = @Schema(implementation = Long.class)),
      })
      @RequestBody(required = false)
      @ApiResponses(value = {
          @ApiResponse(responseCode = "200",
              description = "Success",
              content = @Content(mediaType = "application/json"))
      })
      @Override
      public CompletableFuture<FullHttpResponse> handle(@Parameter(hidden = true) long reqId,
                                                        @Parameter(hidden = true) FullHttpRequest req) {
          Set<String> serviceUniqueNames = governorMap.keySet();
          DefaultFullHttpResponse
              resp = new DefaultFullHttpResponse(req.protocolVersion(), OK,
              Unpooled.wrappedBuffer(toJSON(serviceUniqueNames).getBytes()));
          resp.headers().set("Content-Type", "application/json");
          return CompletableFuture.completedFuture(resp);
      }
  
      private String toJSON(Set<String> serviceUniqueNames) {
          ObjectMapper mapper = JSONUtils.MAPPER;
          ArrayNode rootObject = mapper.createArrayNode();
          for (String name : serviceUniqueNames) {
              rootObject.add(name);
          }
          return rootObject.toString();
      }
  }
  