Property type

Either Built-In or Repository.

Built-In: No property data stored centrally.

Repository: Select the repository file where the
properties are stored.

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.

DB Version

Select the Cassandra version you are using.

API type

This drop-down list is displayed only when you have selected the 2.0 version of Cassandra
from the DB version list. From this API type list, you can either select Datastax to use CQL 3 (Cassandra Query Language) with Cassandra, or select
Hector to use CQL 2.

Note that the Hector API is deprecated for the 2.0 or
later version of Cassandra, but it is still available for use in the Studio so that you can
be flexible about the version of the query language to be used with Cassandra 2.0.0.

Along with the evolution of the CQL commands, the parameters to be set in the Basic settings view varies.

Host

Hostname or IP address of the Cassandra server.

Port

Listening port number of the Cassandra server.

Required authentication

Select this check box to provide credentials for the Cassandra
authentication.

This check box appears only if you do not select the Use existing connection check box.

Username

Fill in this field with the username for the Cassandra
authentication.

Password

Fill in this field with the password for the Cassandra
authentication.

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

Use SSL

Select this check box to enable the SSL or TLS encrypted connection.

Then you need to use the tSetKeystore
component in the same Job to specify the encryption information.

For further information about tSetKeystore, see tSetKeystore.

Keyspace

Type in the name of the keyspace into which you want to write data.

Action on keyspace

Select the operation you want to perform on the keyspace to be used:

• None: No operation is carried out.

• Drop and create keyspace: The keyspace is removed
  and created again.

• Create keyspace: The keyspace does not exist and
  gets created.

• Create keyspace if not exists: A keyspace gets
  created if it does not exist.

• Drop keyspace if exists and create: The keyspace
  is removed if it already exists and created again.

Column family

Type in the name of the keyspace into which you want to write data.

Action on column family

Select the operation you want to perform on the column family to be used:

• None: no operation is carried out.

• Drop and create column family: the column family
  is removed and created again.

• Create column family: the column family does not
  exist and gets created.

• Create column family if not exists: a column
  family gets created if it does not exist.

• Drop column family if exists and create: the
  column family is removed if it already exists and created again.

Action on data

On the data of the table defined, you can perform:

• Upsert: insert the columns if they do not exist
  or update the existing columns.

• Insert: insert the columns if they do not exist.
  This action also updates the existing ones.

• Update: update the existing columns or add the
  columns that do not exist. This action does not support the Counter Cassandra data type.

• Delete: remove columns corresponding to the input
  flow.

Note that the action list varies depending on the Hector or Datastax API you are using. When the API is Datastax, more actions become
available.

For more advanced actions, use the Advanced settings
view.

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.

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.

Built-In: You create and store the
schema locally for this component only. Related topic: see
Talend Studio

User Guide.

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.

You can find more details about how to verify default
values in retrieved schema in Talend Help Center (https://help.talend.com).

Sync columns

Click this button to retrieve schema from the previous component
connected in the Job.

Die on error

Clear the check box to skip any rows on error and complete the process for
error-free rows. When errors are skipped, you can collect the rows on error using a Row > Reject link.

Column family type

Standard: Column family is of
standard type.

Super: Column family is of super
type.

Select the row key column from the list.

Select this check box to include row key in columns.

Select the super column from the list.

This drop-down list appears only if you select Super from the Column family
type drop-down list.

Select this check box to include the super columns in standard
columns.

Select this check box to delete the row.

This check box appears only if you select Delete from the Action on
data drop-down list.

Customize the columns you want to delete.

Select this check box to delete super columns.

This check box appears only if you select the Delete Row check box.

Batch Size

Number of lines in each processed batch.

When you are using the Datastax API,
this feature is displayed only when you have selected the Use unlogged batch check box.

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

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 rule

This component is used as an output component and it always needs an
incoming link.

Use unlogged batch

Insert if not exists

Select this check box to insert rows. This row insertion takes place only when they do not
exist in the target table.

This feature is available to the Insert action
only.

Delete if exists

Select this check box to remove from the target table only the rows that have the same
records in the incoming flow.

This feature is available only to the Delete
action.

Use TTL

Select this check box to write the TTL data in the target table. In the column list that
is displayed, you need to select the column to be used as the TTL column. The DB type of
this column must be Int.

This feature is available to the Insert action and the
Update action only.

Use Timestamp

Select this check box to write the timestamp data in the target table. In the column list
that is displayed, you need to select the column to be used to store the timestamp data. The
DB type of this column must be BigInt.

This feature is available to the following actions: Insert, Update and Delete.

IF condition

Add the condition to be met for the Update or the
Delete action to take place. This condition allows you
to be more precise about the columns to be updated or deleted.

Special assignment operation

Complete this table to construct advanced SET commands of Cassandra to make the Update action more specific. For example, add a record to the
beginning or a particular position of a given column.

Row key in the List type

Select the column to be used to construct the WHERE clause of Cassandra to perform the
Update or the Delete
action on only selected rows. The column(s) to be used in this table should be from the set
of the Primary key columns of the Cassandra table.

Delete collection column based on
postion/key

Select the column to be used as reference to locate the particular row(s) to be
removed.

This feature is available only to the Delete
action.

Property type

Either Built-In or Repository.

Built-In: No property data stored centrally.

Repository: Select the repository file where the
properties are stored.

Sync columns

Click this button to retrieve schema from the previous component
connected in the Job.

Keyspace

Type in the name of the keyspace into which you want to write data.

Action on keyspace

Select the operation you want to perform on the keyspace to be used:

• None: No operation is carried out.

• Drop and create keyspace: The keyspace is removed
  and created again.

• Create keyspace: The keyspace does not exist and
  gets created.

• Create keyspace if not exists: A keyspace gets
  created if it does not exist.

• Drop keyspace if exists and create: The keyspace
  is removed if it already exists and created again.

Column family

Type in the name of the keyspace into which you want to write data.

Action on column family

Select the operation you want to perform on the column family to be used:

• None: no operation is carried out.

• Create column family if not exists: a column
  family gets created if it does not exist.

• Drop column family if exists and create: the
  column family is removed if it already exists and created again.

• Truncate column family: all data from the column
  family is permanently removed.

This list is available only when you have selected Update, Upsert or Insert from the Action on data drop-down
list.

Action on data

On the data of the table defined, you can perform:

• Upsert: insert the columns if they do not exist
  or update the existing columns.

  With this action, the columns to be defined in the schema must use lower case in
  their names, while the names you put in the DB
  column column of the schema must be identical with their equivalents
  in the target table, including the letter cases.

• Insert: insert the columns if they do not exist.
  This action also updates the existing ones.

• Update: update the existing columns or add the
  columns that do not exist. This action does not support the Counter Cassandra data type.

• Delete: remove columns corresponding to the input
  flow.

For more advanced actions, use the Advanced settings
view.

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.

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.

The schema of this component does not support the Object type and the List type.

Built-In: You create and store the
schema locally for this component only. Related topic: see
Talend Studio

User Guide.

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.

You can find more details about how to verify default
values in retrieved schema in Talend Help Center (https://help.talend.com).

Configuration

The following list presents the numerical values you can put and the consistency levels
they signify:

When a row is added to the table, you need to click the new row in the Property name column to display the list of the available
properties and select the property or properties to be customized. For further information
about each of these properties, see the Tuning section in the following link: https://github.com/datastax/spark-cassandra-connector/blob/master/doc/5_saving.md.

Use unlogged batch

Select this check box to handle data in batch but with Cassandra’s UNLOGGED approach. This
feature is available to the following three actions: Insert, Update and Delete.

The ideal situation to use batches with Cassandra is when a small number of tables must
synchronize the data to be inserted or updated.

In this UNLOGGED approach, the Job does not write batches into Cassandra’s batchlog system
and thus avoids the performance issue incurred by this writing. For further information
about Cassandra’s BATCH statement and UNLOGGED approach, see Batches and Using unlogged batches.

Insert if not exists

Select this check box to insert rows. This row insertion takes place only when they do not
exist in the target table.

This feature is available to the Insert action
only.

Delete if exists

Select this check box to remove from the target table only the rows that have the same
records in the incoming flow.

This feature is available only to the Delete
action.

Use TTL

Select this check box to write the TTL data in the target table. In the column list that
is displayed, you need to select the column to be used as the TTL column. The DB type of
this column must be Int.

This feature is available to the Insert action and the
Update action only.

Use Timestamp

Select this check box to write the timestamp data in the target table. In the column list
that is displayed, you need to select the column to be used to store the timestamp data. The
DB type of this column must be BigInt.

This feature is available to the following actions: Insert, Update and Delete.

IF condition

Add the condition to be met for the Update or the
Delete action to take place. This condition allows you
to be more precise about the columns to be updated or deleted.

Special assignment operation

Complete this table to construct advanced SET commands of Cassandra to make the Update action more specific. For example, add a record to the
beginning or a particular position of a given column.

Row key in the List type

Select the column to be used to construct the WHERE clause of Cassandra to perform the
Update or the Delete
action on only selected rows. The column(s) to be used in this table should be from the set
of the Primary key columns of the Cassandra table.

Delete collection column based on
postion/key

Select the column to be used as reference to locate the particular row(s) to be
removed.

This feature is available only to the Delete
action.

Usage rule

This component is used as an end component and requires an input link.

This component should use one and only one tCassandraConfiguration component present in the same Job to connect to
Cassandra. More than one tCassandraConfiguration components
present in the same Job fail the execution of the Job.

This component, along with the Spark Batch component Palette it belongs to, appears only
when you are creating a Spark Batch 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.

Spark Connection

This connection is effective on a per-Job basis.

Property type

Either Built-In or Repository.

Built-In: No property data stored centrally.

Repository: Select the repository file where the
properties are stored.

Sync columns

Click this button to retrieve schema from the previous component
connected in the Job.

Keyspace

Type in the name of the keyspace into which you want to write data.

Action on keyspace

Select the operation you want to perform on the keyspace to be used:

• None: No operation is carried out.

• Drop and create keyspace: The keyspace is removed
  and created again.

• Create keyspace: The keyspace does not exist and
  gets created.

• Create keyspace if not exists: A keyspace gets
  created if it does not exist.

• Drop keyspace if exists and create: The keyspace
  is removed if it already exists and created again.

Column family

Type in the name of the keyspace into which you want to write data.

Action on column family

Select the operation you want to perform on the column family to be used:

• None: no operation is carried out.

• Create column family if not exists: a column
  family gets created if it does not exist.

• Drop column family if exists and create: the
  column family is removed if it already exists and created again.

• Truncate column family: all data from the column
  family is permanently removed.

This list is available only when you have selected Update, Upsert or Insert from the Action on data drop-down
list.

Action on data

On the data of the table defined, you can perform:

• Upsert: insert the columns if they do not exist
  or update the existing columns.

  With this action, the columns to be defined in the schema must use lower case in
  their names, while the names you put in the DB
  column column of the schema must be identical with their equivalents
  in the target table, including the letter cases.

• Insert: insert the columns if they do not exist.
  This action also updates the existing ones.

• Update: update the existing columns or add the
  columns that do not exist. This action does not support the Counter Cassandra data type.

• Delete: remove columns corresponding to the input
  flow.

For more advanced actions, use the Advanced settings
view.

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.

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.

The schema of this component does not support the Object type and the List type.

Built-In: You create and store the
schema locally for this component only. Related topic: see
Talend Studio

User Guide.

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.

You can find more details about how to verify default
values in retrieved schema in Talend Help Center (https://help.talend.com).

Configuration

The following list presents the numerical values you can put and the consistency levels
they signify:

When a row is added to the table, you need to click the new row in the Property name column to display the list of the available
properties and select the property or properties to be customized. For further information
about each of these properties, see the Tuning section in the following link: https://github.com/datastax/spark-cassandra-connector/blob/master/doc/5_saving.md.

Use unlogged batch

Select this check box to handle data in batch but with Cassandra’s UNLOGGED approach. This
feature is available to the following three actions: Insert, Update and Delete.

The ideal situation to use batches with Cassandra is when a small number of tables must
synchronize the data to be inserted or updated.

In this UNLOGGED approach, the Job does not write batches into Cassandra’s batchlog system
and thus avoids the performance issue incurred by this writing. For further information
about Cassandra’s BATCH statement and UNLOGGED approach, see Batches and Using unlogged batches.

Insert if not exists

Select this check box to insert rows. This row insertion takes place only when they do not
exist in the target table.

This feature is available to the Insert action
only.

Delete if exists

Select this check box to remove from the target table only the rows that have the same
records in the incoming flow.

This feature is available only to the Delete
action.

Use TTL

Select this check box to write the TTL data in the target table. In the column list that
is displayed, you need to select the column to be used as the TTL column. The DB type of
this column must be Int.

This feature is available to the Insert action and the
Update action only.

Use Timestamp

Select this check box to write the timestamp data in the target table. In the column list
that is displayed, you need to select the column to be used to store the timestamp data. The
DB type of this column must be BigInt.

This feature is available to the following actions: Insert, Update and Delete.

IF condition

Add the condition to be met for the Update or the
Delete action to take place. This condition allows you
to be more precise about the columns to be updated or deleted.

Special assignment operation

Complete this table to construct advanced SET commands of Cassandra to make the Update action more specific. For example, add a record to the
beginning or a particular position of a given column.

Row key in the List type

Select the column to be used to construct the WHERE clause of Cassandra to perform the
Update or the Delete
action on only selected rows. The column(s) to be used in this table should be from the set
of the Primary key columns of the Cassandra table.

Delete collection column based on
postion/key

Select the column to be used as reference to locate the particular row(s) to be
removed.

This feature is available only to the Delete
action.

Usage rule

This component is used as an end component and requires an input link.

This component should use one and only one tCassandraConfiguration component present in the same Job to connect to
Cassandra. More than one tCassandraConfiguration components
present in the same Job fail the execution of the Job.

This component, along with the Spark Batch component Palette it belongs to, appears only
when you are creating a Spark Batch 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.

Spark Connection

This connection is effective on a per-Job basis.