tRiakKeyList – Docs for ESB 5.x

Component Family

Big Data / Riak

Function

tRiakKeyList iterates on a list of keys within a Riak
bucket.

Purpose

tRiakKeyList allows you to retrieve a list of keys
within a Riak bucket for analysis or development purposes.

Basic settings

Use an existing
connection

Select this check box and in the Component List click the
relevant connection component to reuse the connection details you already defined.

Nodes

Fill in the information required for a connection to a Riak
cluster.

One example of the URL for accessing a Riak node is http://127.0.0.1:8098/riak.

For more information about the concepts related to Riak, see http://docs.basho.com/riak/latest/theory/concepts/.

Bucket

Type in the name of the bucket from which you want to retrieve all keys.

Advanced settings

tStatCatcher Statistics

Select this check box to gather the Job processing metadata at the
Job level as well as at each component level.

Global Variables

CURRENT_KEY: the current key. This is a Flow variable and
it returns a string.

NB_LINE: the number of rows read by an input component or
transferred to an output component. This is an After variable and it returns an
integer.

ERROR_MESSAGE: the error message generated by the
component when an error occurs. This is an After variable and it returns a string. This
variable functions only if the Die on error check box is
cleared, if the component has this check box.

A Flow variable functions during the execution of a component while an After variable
functions after the execution of the component.

To fill up a field or expression with a variable, press Ctrl +
Space to access the variable list and choose the variable to use from it.

For further information about variables, see Talend Studio
User Guide.

Usage

This component can be used as a standalone component.

Log4j

The activity of this component can be logged using the log4j feature. For more information on this feature, see Talend Studio User
Guide.

For more information on the log4j logging levels, see the Apache documentation at http://logging.apache.org/log4j/1.2/apidocs/org/apache/log4j/Level.html.

Limitation

n/a