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* updated metadata-ingestion and apis documents * minor changes in * addressing maven ci findings Co-authored-by: Parth Panchal <parthpanchal@Parths-MacBook-Air.local>
111 lines
3.8 KiB
Markdown
111 lines
3.8 KiB
Markdown
# Topic
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This schema defines the Topic entity. A topic is a feed into which message are published to by publishers and read from by consumers in a messaging service.
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**$id: [https://open-metadata.org/schema/entity/data/topic.json](https://open-metadata.org/schema/entity/data/topic.json)**
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Type: `object`
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## Properties
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- **id** `required`
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- Unique identifier that identifies this topic instance.
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- $ref: [../../type/basic.json#/definitions/uuid](../types/basic.md#uuid)
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- **name** `required`
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- Name that identifies the topic.
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- $ref: [#/definitions/topicName](#topicname)
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- **fullyQualifiedName**
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- Name that uniquely identifies a topic in the format 'messagingServiceName.topicName'.
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- Type: `string`
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- **displayName**
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- Display Name that identifies this topic. It could be title or label from the source services.
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- Type: `string`
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- **description**
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- Description of the topic instance.
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- Type: `string`
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- **version**
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- Metadata version of the entity.
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- $ref: [../../type/basic.json#/definitions/entityVersion](../types/basic.md#entityversion)
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- **updatedAt**
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- Last update time corresponding to the new version of the entity.
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- $ref: [../../type/basic.json#/definitions/dateTime](../types/basic.md#datetime)
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- **updatedBy**
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- User who made the update.
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- Type: `string`
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- **service** `required`
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- Link to the messaging cluster/service where this topic is hosted in.
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- $ref: [../../type/entityReference.json](../types/entityreference.md)
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- **partitions** `required`
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- Number of partitions into which the topic is divided.
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- Type: `integer`
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- Range: ≥ 1
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- **schemaText**
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- Schema used for message serialization. Optional as some topics may not have associated schemas.
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- Type: `string`
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- **schemaType**
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- Schema used for message serialization.
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- $ref: [#/definitions/schemaType](#schematype)
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- **cleanupPolicies**
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- Topic clean up policies. For Kafka - `cleanup.policy` configuration.
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- Type: `array`
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- **Items**
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- $ref: [#/definitions/cleanupPolicy](#cleanuppolicy)
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- **retentionTime**
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- Retention time in milliseconds. For Kafka - `retention.ms` configuration.
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- Type: `number`
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- **replicationFactor**
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- Replication Factor in integer (more than 1).
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- Type: `integer`
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- **maximumMessageSize**
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- Maximum message size in bytes. For Kafka - `max.message.bytes` configuration.
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- Type: `integer`
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- **minimumInSyncReplicas**
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- Minimum number replicas in sync to control durability. For Kafka - `min.insync.replicas` configuration.
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- Type: `integer`
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- **retentionSize**
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- Maximum size of a partition in bytes before old data is discarded. For Kafka - `retention.bytes` configuration.
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- Type: `number`
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- Default: _"-1"_
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- **owner**
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- Owner of this topic.
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- $ref: [../../type/entityReference.json](../types/entityreference.md)
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- **followers**
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- Followers of this table.
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- $ref: [../../type/entityReference.json#/definitions/entityReferenceList](../types/entityreference.md#entityreferencelist)
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- **tags**
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- Tags for this table.
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- Type: `array`
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- **Items**
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- $ref: [../../type/tagLabel.json](../types/taglabel.md)
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- **href**
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- Link to the resource corresponding to this entity.
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- $ref: [../../type/basic.json#/definitions/href](../types/basic.md#href)
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## Type definitions in this schema
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### topicName
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- Name that identifies a topic.
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- Type: `string`
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- The value must match this pattern: `^[^.]*$`
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- Length: between 1 and 64
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### schemaType
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- Schema type used for the message.
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- The value is restricted to the following:
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1. _"Avro"_
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2. _"Protobuf"_
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3. _"JSON"_
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4. _"Other"_
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### cleanupPolicy
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- Topic clean up policy. For Kafka - `cleanup.policy` configuration.
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- The value is restricted to the following:
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1. _"delete"_
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2. _"compact"_
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_This document was updated on: Monday, October 18, 2021_ |