The Kafka output in ArcGIS Velocity can be used to send output features to a topic in an externally accessible Kafka broker. A Kafka message is sent for each output feature sent to the output.
Examples
以下是输出的使用示例：
- An analyst configures a real-time analytic to process and analyze events ingested by a feed and sends the resulting features to a Kafka topic.
- A financial analyst sends real-time stock trade updates to a Kafka topic, allowing instant data access.
Usage note
使用输出时，请谨记以下信息：
The following output data formats are available:
- Delimited
- JSON
- GeoJSON
- EsriJSON
Parameters
以下是输出的参数：
| Parameter | Description | Data type |
|---|---|---|
| Brokers | A comma-delimited list of Kafka brokers, specified as server:port—for example, machine1.domain.com:9092,machine2.domain.com:9092,machine3.domain.com:9092. | 字符串 |
| Topic | The Kafka topic the output sends messages to. | 字符串 |
| Authentication | Specifies the type of authentication to access the HTTP endpoint. The following are the authentication options:
| 字符串 |
| Use SSL | Specifies whether Velocity uses SSL (SASL_SSL) in attempting to connect to the Kafka broker. 注：This should match the configuration the broker has on a specified port. If you this turn parameter off, Velocity connects with PLAINTEXT. | 布尔 |
| Username | Specifies the username for accessing the Kafka broker. This parameter only applies when Authentication is set to SASL/PLAIN, SASL/SCRAM-SHA-256, or SASL/SCRAM-SHA-512. | 字符串 |
| Password | Specifies the password for accessing the Kafka broker. This parameter only applies when Authentication is set to SASL/PLAIN, SASL/SCRAM-SHA-256, or SASL/SCRAM-SHA-512. | 字符串 |
| Output format name | The format for outgoing messages. The following are the supported output format names:
| 字符串 |
| Write header rows | Specifies if the files write out the header row with field names. The default is false. | 布尔 |
| Field delimiter | The field delimiter used by the file to separate fields. The default is a comma. | 字符串 |