streams/src/main/resources/common/message/SubscriptionInfoData.json

// 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.

{
  "name": "SubscriptionInfoData",
  "validVersions": "1-11",
  "flexibleVersions": "none",
  "fields": [
    {
      "name": "version",
      "versions": "1+",
      "type": "int32"
    },
    {
      "name": "latestSupportedVersion",
      "versions": "3+",
      "default": "-1",
      "type": "int32"
    },
    {
      "name": "processId",
      "versions": "1+",
      "type": "uuid"
    },
    /***** Protocol version 1-6 only (after 6 this is encoded in task offset sum map) *****/
    {
      "name": "prevTasks",
      "versions": "1-6",
      "type": "[]TaskId"
    },
    {
      "name": "standbyTasks",
      "versions": "1-6",
      "type": "[]TaskId"
    },
    /***************/
    {
      "name": "userEndPoint",
      "versions": "2+",
      "type": "bytes"
    },
    {
      "name": "taskOffsetSums",
      "versions": "7+",
      "type": "[]TaskOffsetSum"
    },
    {
      "name": "uniqueField",
      "versions": "8+",
      "type": "int8"
    },
    {
      "name": "errorCode",
      "versions": "9+",
      "type": "int32"
    },
    {
      "name": "clientTags",
      "versions": "11+",
      "type": "[]ClientTag"
    }
  ],
  "commonStructs": [
    // TaskId was only used from 1-6, after 6 we encode each field of the TaskId separately along with the other information for that map entry
    {
      "name": "TaskId",
      "versions": "1-6",
      "fields": [
        {
          "name": "topicGroupId",
          "versions": "1-6",
          "type": "int32"
        },
        {
          "name": "partition",
          "versions": "1-6",
          "type": "int32"
        }
      ]
    },
    {
      "name": "TaskOffsetSum",
      "versions": "7+",
      "fields": [
        {
          "name": "topicGroupId",
          "versions": "7+",
          "type": "int32"
        },
        // Prior to version 10, in 7-9, the below fields (partition and offsetSum) were encoded via the nested
        // partitionToOffsetSum struct. In 10+ all fields are encoded directly in the TaskOffsetSum struct
        {
          "name": "partition",
          "versions": "10+",
          "type": "int32"
        },
        {
          "name": "offsetSum",
          "versions": "10+",
          "type": "int64"
        },
        {
          "name": "namedTopology",
          "versions": "10+",
          "nullableVersions": "10+",
          "ignorable":  "false",  // namedTopology is not ignorable because if you do, a TaskId may not be unique
          "type": "string"
        },
        {
          "name": "partitionToOffsetSum",
          "versions": "7-9",
          "type": "[]PartitionToOffsetSum"
        }
      ]
    },

    {
      "name": "PartitionToOffsetSum",
      "versions": "7-9",
      "fields": [
        {
          "name": "partition",
          "versions": "7-9",
          "type": "int32"
        },
        {
          "name": "offsetSum",
          "versions": "7-9",
          "type": "int64"
        }
      ]
    },
    {
      "name": "ClientTag",
      "versions": "11+",
      "fields": [
        {
          "name": "key",
          "versions": "11+",
          "type": "bytes"
        },
        {
          "name": "value",
          "versions": "11+",
          "type": "bytes"
        }
      ]
    }
  ],
  "type": "data"
}