Component family |
Big Data / Riak | |
Basic settings |
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. The schema is either Built-In or stored remotely in the Repository. Since version 5.6, both the Built-In mode and the Repository mode are available in any of the Talend solutions. Click Edit schema to make changes to the schema. If the current schema is of the Repository type, three options are available:
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Built-In: You create and store the schema locally for this component only. Related topic: see Talend Studio User Guide. |
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Repository: You have already created the schema and stored it in the Repository. You can reuse it in various projects and Job designs. Related topic: see Talend Studio User Guide. When the schema to be reused has default values that are integers or functions, ensure that these default values are not enclosed within quotation marks. If they are, you must remove the quotation marks manually. For more details, see the article Verifying default values in a retrieved schema on |
Use existing connection |
Select this check box and in the Component List click the relevant connection component to reuse the connection details you already defined. WarningIf you select the Use an existing connection check box, the Nodes table will not be available. | |
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 |
Specify the name of the bucket to which you want to apply changes. | |
Action on data |
In the specified bucket, you can perform:
WarningIf you select Delete from the Action on data list, only the Key column list is available in the Key area. | |
Auto generate the key |
Select this check box to let the Riak system generate keys for the values automatically. | |
Key column |
Select one column from the list to write its data into the Riak bucket as keys. Note that the key must be unique across one bucket. | |
Value columns |
Customize the columns to write their data into the Riak bucket as values. | |
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 |
UPSERT_NB_LINE: the number of rows inserted and updated. This is an After variable and it returns an integer. DELETE_NB_LINE: the number of rows deleted. 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 is used as an output component and it always needs an incoming link. | |
Log4j | If you are using a subscription-based version of the Studio, 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 |