Schema and Edit
Schema

A schema is a row description. It defines the number of fields
(columns) to be processed and passed on to the next component. When you create a Spark
Job, avoid the reserved word line when naming the
fields.

Built-In: You create and store the schema locally for this component
only.

Repository: You have already created the schema and stored it in the
Repository. You can reuse it in various projects and Job designs.

Click Edit
schema to make changes to the schema. If the current schema is of the Repository type, three options are available:

• View schema: choose this
  option to view the schema only.

• Change to built-in property:
  choose this option to change the schema to Built-in for local changes.

• Update repository connection:
  choose this option to change the schema stored in the repository and decide whether
  to propagate the changes to all the Jobs upon completion. If you just want to
  propagate the changes to the current Job, you can select No upon completion and choose this schema metadata
  again in the Repository Content
  window.

Bolt code

Enter the body of the main method of the bolt you want to
execute.

Bolt advanced code

This area allows you to define the classes, variables and methods
that you want to use along with the execute method of the bolt defined in the Basic settings view. Note that the
advanced code is not required for using tJavaStorm.

Two fields are available for this purpose:

Implement the prepare code:
select this check box and in the displayed field, define the
prepare method to set up the
environment in which the bolt is executed.

Implement the cleanup method:
select this check box and in the displayed field, define the
cleanup method you want to
use to finalize a topology.

Usage rule

Once a Storm Job is opened in the workspace, tJavaStorm appears in the Palette of the Studio. It is used as an intermediate
step in a Storm Job.

Note that in this documentation, unless otherwise explicitly stated, a scenario presents
only Standard Jobs, that is to say traditional
Talend
data
integration Jobs.

Storm Connection

You need to use the Storm Configuration tab in the
Run view to define the connection to a given Storm
system for the whole Job.

This connection is effective on a per-Job basis.