tGSList – Docs for ESB 5.x

Component Family

Big Data / Google Cloud Storage

Function

tGSList iterates on a list of
objects which match the specified criteria in Google Cloud
Storage.

Purpose

tGSList allows you to retrieve a
list of objects from Google Cloud Storage one by one.

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.

Access Key and Secret Key

Type in the authentication information obtained from Google for
making requests to Google Cloud Storage.

These keys can be consulted on the Interoperable Access tab view
under the Google Cloud Storage tab of the project from the Google
APIs Console.

To enter the secret key, click the […] button next to
the secret key field, and then in the pop-up dialog box enter the password between double
quotes and click OK to save the settings.

For more information about the access key and secret key, go to
https://developers.google.com/storage/docs/reference/v1/getting-startedv1?hl=en/
and see the description about developer keys.

Key prefix

Specify the key prefix so that only the objects whose keys begin
with the specified string will be listed.

Delimiter

Specify the delimiter in order to list only those objects with key
names up to the delimiter.

Specify project ID

Select this check box and in the Project
ID field enter the project ID from which you want to
retrieve a list of objects.

List objects in bucket
list

Select this check box and complete the Bucket table to retrieve objects in the specified
buckets.

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_BUCKET: the current bucket name. This is a Flow
variable and it returns a string.

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.

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

The tGSList component can be used
as a standalone component or as a start component of a
process.

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