Kudu Component

Since Camel 3.0

Only producer is supported

Since Camel 3.0

The Kudu component supports storing and retrieving data from/to Apache Kudu, a free and open source column-oriented data store of the Apache Hadoop ecosystem.

Prerequisites

You must have a valid Kudu instance running. More information are available at Apache Kudu.

The Kudu component supports 3 options, which are listed below.

Name Description Default Type

basicPropertyBinding (advanced)

Whether the component should use basic property binding (Camel 2.x) or the newer property binding with additional capabilities

false

boolean

lazyStartProducer (producer)

Whether the producer should be started lazy (on the first message). By starting lazy you can use this to allow CamelContext and routes to startup in situations where a producer may otherwise fail during starting and cause the route to fail being started. By deferring this startup to be lazy then the startup failure can be handled during routing messages via Camel’s routing error handlers. Beware that when the first message is processed then creating and starting the producer may take a little time and prolong the total processing time of the processing.

false

boolean

bridgeErrorHandler (consumer)

Allows for bridging the consumer to the Camel routing Error Handler, which mean any exceptions occurred while the consumer is trying to pickup incoming messages, or the likes, will now be processed as a message and handled by the routing Error Handler. By default the consumer will use the org.apache.camel.spi.ExceptionHandler to deal with exceptions, that will be logged at WARN or ERROR level and ignored.

false

boolean

The Kudu endpoint is configured using URI syntax:

kudu:host:port/tableName

with the following path and query parameters:

Path Parameters (3 parameters):

Name Description Default Type

host

Kudu master to connect to

String

port

Port where kudu service is listening

String

tableName

The name of the table where the rows are stored

String

Query Parameters (4 parameters):

Name Description Default Type

lazyStartProducer (producer)

Whether the producer should be started lazy (on the first message). By starting lazy you can use this to allow CamelContext and routes to startup in situations where a producer may otherwise fail during starting and cause the route to fail being started. By deferring this startup to be lazy then the startup failure can be handled during routing messages via Camel’s routing error handlers. Beware that when the first message is processed then creating and starting the producer may take a little time and prolong the total processing time of the processing.

false

boolean

operation (producer)

What kind of operation is to be performed in the table

KuduOperations

basicPropertyBinding (advanced)

Whether the endpoint should use basic property binding (Camel 2.x) or the newer property binding with additional capabilities

false

boolean

synchronous (advanced)

Sets whether synchronous processing should be strictly used, or Camel is allowed to use asynchronous processing (if supported).

false

boolean

Input Body formats

Insert

The input body format has to be a java.util.Map<String, Object>. This map will represent a row of the table whose elements are columns, where the key is the column name and the value is the value of the column.

Output Body formats

Scan

The output body format will be a java.util.List<java.util.Map<String, Object>>. Each element of the list will be a different row of the table. Each row is a Map<String, Object> whose elements will be each pair of column name and column value for that row.

Dependencies

Maven users will need to add the following dependency to their pom.xml.

pom.xml

<dependency>
    <groupId>org.apache.camel</groupId>
    <artifactId>camel-kudu</artifactId>
    <version>${camel-version}</version>
</dependency>

where ${camel-version} must be replaced by the actual version of Camel (3.0 or higher).

Spring Boot Auto-Configuration

When using Spring Boot make sure to use the following Maven dependency to have support for auto configuration:

<dependency>
  <groupId>org.apache.camel</groupId>
  <artifactId>camel-kudu-starter</artifactId>
  <version>x.x.x</version>
  <!-- use the same version as your Camel core version -->
</dependency>

Camel Kudu Starter

A starter module is available to spring-boot users.

To use this feature, add the following dependencies to your spring boot pom.xml file:

<dependency>
    <groupId>org.apache.camel</groupId>
    <artifactId>camel-kudu-starter</artifactId>
    <version>${camel.version}</version> <!-- use the same version as your Camel core version -->
</dependency>