{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "$id": "http://asyncapi.com/bindings/kafka/0.5.0/channel.json",
  "title": "Channel Schema",
  "description": "This object contains information about the channel representation in Kafka.",
  "type": "object",
  "additionalProperties": false,
  "patternProperties": {
    "^x-[\\w\\d\\.\\x2d_]+$": {
      "$ref": "http://asyncapi.com/definitions/3.0.0/specificationExtension.json"
    }
  },
  "properties": {
    "topic": {
      "type": "string",
      "description": "Kafka topic name if different from channel name."
    },
    "partitions": {
      "type": "integer",
      "minimum": 1,
      "description": "Number of partitions configured on this topic."
    },
    "replicas": {
      "type": "integer",
      "minimum": 1,
      "description": "Number of replicas configured on this topic."
    },
    "topicConfiguration" : {
      "description": "Topic configuration properties that are relevant for the API.",
      "type": "object",
      "additionalProperties": true,
      "properties": {
        "cleanup.policy": {
          "description": "The [`cleanup.policy`](https://kafka.apache.org/documentation/#topicconfigs_cleanup.policy) configuration option.",
          "type": "array",
          "items":{
            "type": "string",
            "enum": ["compact", "delete"]
          }
        },
        "retention.ms": {
          "description": "The [`retention.ms`](https://kafka.apache.org/documentation/#topicconfigs_retention.ms) configuration option.",
          "type": "integer",
          "minimum": -1            
        },
        "retention.bytes": {
          "description": "The [`retention.bytes`](https://kafka.apache.org/documentation/#topicconfigs_retention.bytes) configuration option.",
          "type": "integer",
          "minimum": -1
        },
        "delete.retention.ms": {
          "description": "The [`delete.retention.ms`](https://kafka.apache.org/documentation/#topicconfigs_delete.retention.ms) configuration option.",
          "type": "integer",
          "minimum": 0
        },
        "max.message.bytes": {
          "description": "The [`max.message.bytes`](https://kafka.apache.org/documentation/#topicconfigs_max.message.bytes) configuration option.",
          "type": "integer",
          "minimum": 0
        },
        "confluent.key.schema.validation": {
          "description": "It shows whether the schema validation for the message key is enabled. Vendor specific config. For more details: (https://docs.confluent.io/platform/current/installation/configuration/topic-configs.html#confluent-key-schema-validation)",
          "type": "boolean"
        },
        "confluent.key.subject.name.strategy": {
          "description": "The name of the schema lookup strategy for the message key. Vendor specific config. For more details: (https://docs.confluent.io/platform/current/installation/configuration/topic-configs.html#confluent-key-subject-name-strategy)",
          "type": "string"
        },
        "confluent.value.schema.validation": {
          "description": "It shows whether the schema validation for the message value is enabled. Vendor specific config. For more details: (https://docs.confluent.io/platform/current/installation/configuration/topic-configs.html#confluent-value-schema-validation)",
          "type": "boolean"
        },
        "confluent.value.subject.name.strategy": {
          "description": "The name of the schema lookup strategy for the message value. Vendor specific config. For more details: (https://docs.confluent.io/platform/current/installation/configuration/topic-configs.html#confluent-value-subject-name-strategy)",
          "type": "string"
        }
      }
    },
    "bindingVersion": {
      "type": "string",
      "enum": [
        "0.5.0"
      ],
      "description": "The version of this binding. If omitted, 'latest' MUST be assumed."
    }

  },
  "examples": [
    {
      "topic": "my-specific-topic",
      "partitions": 20,
      "replicas": 3,
      "bindingVersion": "0.5.0"
    }
  ]
}