Establishing a Connection
This section describes how to connect to Apache Impala from your AnyPoint Studio project. You can use wizards or the XML editor in AnyPoint Studio to define connection properties in a global element. Global elements can be reused across other building blocks in your project.
Create a Connection in the Visual Editor
Complete the following steps to visually add the connector to your project and create a connection:
- Create a new Mule Project in Anypoint Studio.
- From the palette, drag the connector into your Mule flow.
- On the Message Flow canvas, double-click the connector icon to open the connector properties in the Properties pane.
- In the General section, click Add and define the Apache Impala connection properties. Note that the user name and Password properties always appear here. The user name must be set as it is used as the key for the connection if connection pooling is enabled.
Create a Connection in the XML Editor
Set connection properties in the <cdata-apacheimpala:config> element in the root of the project's XML.
Note: The user name attribute must always be included here and serves as the key for the connection if connection pooling is enabled.
<cdata-apacheimpala:config name="CData_ApacheImpala_Configuration" username="MyName" connectionProperty1="MyProperty" ... doc:name="CData ApacheImpala: Configuration"/>
Connecting to Apache Impala
In order to connect to Apache Impala, set the Server, Port, and ProtocolVersion. You may optionally specify a default Database.
Authenticating to Apache Impala
There are several ways to authenticate to Apache Impala including NOSASL,LDAP,KERBEROS. The following sections cover how to connect over each.
Authenticating with NOSASL
When using NOSASL, no authentication is performaned. It is used when you are connecting to a server from a trusted location such as a test machine on your local network. By default, NOSASL is as the default AuthScheme, so no additional connection properties need to be set.
Authenticating with LDAP
To authenticate with LDAP, set the following connection properties:
- AuthScheme: Set this to LDAP.
- User: Set this to user to login as.
- Password: Set this to the password of the user.
Authenticating with Kerberos
Please see Using Kerberos for details on how to authenticate with Kerberos.
Configure Connector Operations
The connector is an operation-based connector; its operations correspond to SQL statements and expose other functionality such as Schema Discovery. See Using the Connector (Mule 3.8+) for more information on executing SQL to Apache Impala in Mule applications.