tNeo4jConnection - 6.1

Talend Components Reference Guide

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This component will be available in the Palette of the studio on the condition that you have subscribed to one of the Talend solutions with Big Data.

tNeo4jConnection properties

Component family

Big Data / Neo4j



In embedded mode the tNeo4jConnection start the database, and check the server availability in REST mode.


tNeo4jConnection allows you to define a connection to a Neo4j database to be reuse by other Neo4j components.

Basic settings

DB version

Select the Neo4j version you are using, between Neo4J 1.X.X and Neo4J 2.X.X.

Note that Neo4j version 2.X.X is compatible only with Java 7 or higher but it offers support of advanced features such as node labels.

Upon selecting a database version, you will be prompted to install the corresponding database driver JAR files if not yet installed. For more information on installing third-party modules, see the Talend Installation Guide.


Use a remote server

Select this check box if you use a Neo4j REST server.

  • Set username: this check box is available when you have selected the Use a remote server check box and the Neo4j version you are using is earlier than 2.2. If the remote Neo4j server you want to connect to does not require user credentials, leave it clear.

  • Username and Password: enter the authentication information to connect to the remote Neo4j server to be used. Since Neo4j 2.2, user credentials are always required.


Database path

If you use Neo4j in embedded mode, specify the path of data file.


This field is available only if the Use a remote server check box is not selected.


Server URL

If you use Neo4j in REST mode, specify the root URL.


This field is available only if the Use a remote server check box is selected.


Read only

Select this check box if you want to use the embedded database in read only mode. It's useful if an application is already dedicated with the database.


Do not use this mode when you have any output Neo4j component in your Job such as tNeo4jOutput, tNeo4jOutputRelationship or tNeo4jRow.

Advanced settings tStatCatcher Statistics Select this check box to collect the log data at a component level.

Global Variables

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 generally used with other Neo4j components, particularly tNeo4jClose.