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// 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.

{
  "apiKey": 3,
  "type": "request",
  "listeners": ["zkBroker", "broker"],
  "name": "MetadataRequest",
  "validVersions": "0-12",
  "flexibleVersions": "9+",
  "fields": [
    // In version 0, an empty array indicates "request metadata for all topics."  In version 1 and
    // higher, an empty array indicates "request metadata for no topics," and a null array is used to
    // indiate "request metadata for all topics."
    //
    // Version 2 and 3 are the same as version 1.
    //
    // Version 4 adds AllowAutoTopicCreation.
    //
    // Starting in version 8, authorized operations can be requested for cluster and topic resource.
    //
    // Version 9 is the first flexible version.
    //
    // Version 10 adds topicId and allows name field to be null. However, this functionality was not implemented on the server.
    // Versions 10 and 11 should not use the topicId field or set topic name to null.
    //
    // Version 11 deprecates IncludeClusterAuthorizedOperations field. This is now exposed
    // by the DescribeCluster API (KIP-700).
    // Version 12 supports topic Id.
    { "name": "Topics", "type": "[]MetadataRequestTopic", "versions": "0+", "nullableVersions": "1+",
      "about": "The topics to fetch metadata for.", "fields": [
      { "name": "TopicId", "type": "uuid", "versions": "10+", "ignorable": true, "about": "The topic id." },
      { "name": "Name", "type": "string", "versions": "0+", "entityType": "topicName", "nullableVersions": "10+",
        "about": "The topic name." }
    ]},
    { "name": "AllowAutoTopicCreation", "type": "bool", "versions": "4+", "default": "true", "ignorable": false,
      "about": "If this is true, the broker may auto-create topics that we requested which do not already exist, if it is configured to do so." },
    { "name": "IncludeClusterAuthorizedOperations", "type": "bool", "versions": "8-10",
      "about": "Whether to include cluster authorized operations." },
    { "name": "IncludeTopicAuthorizedOperations", "type": "bool", "versions": "8+",
      "about": "Whether to include topic authorized operations." }
  ]
}