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Use Studio to Configure Database Connector 1.8 - Mule 4

Anypoint Studio (Studio) editors help you design and update your Mule applications, properties, and configuration files.

To add and configure a connector in Studio:

When you run the connector, you can view the app log to check for problems, as described in View the App Log.

If you are new to configuring connectors in Studio, see Use Studio to Configure a Connector. If, after reading this topic, you need additional information about the connector fields, see the Database Connector Reference.

Create a Mule Project

In Studio, create a new Mule project in which to add and configure the connector:

  1. In Studio, select File > New > Mule Project.

  2. Enter a name for your Mule project and click Finish.

Add the Connector to Your Mule Project

Add Database Connector to your Mule project to automatically populate the XML code with the connector’s namespace and schema location and to add the required dependencies to the project’s pom.xml file:

  1. In the Mule Palette view, click (X) Search in Exchange.

  2. In the Add Dependencies to Project window, type database in the search field.

  3. Click Database Connector in Available modules.

  4. Click Add.

  5. Click Finish.

Adding a connector to a Mule project in Studio does not make that connector available to other projects in your Studio workspace.

Configure a Source

A source initiates a flow when a specified condition is met. You can configure one of these input sources to use with Database Connector:

  • Database > On Table Row
    Initiates a flow by selecting from a table at a regular interval and generates one message per obtained row

  • HTTP > Listener
    Initiates a flow each time it receives a request on the configured host and port

  • Scheduler
    Initiates a flow when a time-based condition is met

For example, to configure an On Table Row source, follow these steps:

  1. In the Mule Palette view, select Database > On Table Row.

  2. Drag On Table Row to the Studio canvas.

  3. On the On Table Row configuration screen, optionally change the value of the Display Name field.

  4. Click the plus sign (+) next to the Connector configuration field to configure a global element that can be used by all instances of the source in the app.

  5. On the Database Config window, for Connection select any of the connection types to provide to this configuration:

    • Data Source Reference Connection

    • Derby Connection

    • Generic Connection

    • Microsoft SQL Server Connection

    • MySQL Connection

    • Oracle Connection

  1. On the General tab, specify the database connection information for the connector.

  2. On the Transactions tab, optionally specify the transaction isolation, or XA transactions when connecting to the database.

  3. On the Advanced tab, optionally specify connection pooling and reconnection information, including a reconnection strategy.

  4. Click Test Connection to confirm that Mule can connect with the specified database.

  5. Click OK to close the window.

  6. On the On Table Row configuration screen, in Table, specify the name of the table to select from.

Add a Connector Operation to the Flow

When you add a connector operation to your flow, you immediately define a specific operation for that connector to perform.

To add an operation for Database Connector, follow these steps:

  1. In the Mule Palette view, select Database Connector and then select the desired operation.

  2. Drag the operation onto the Studio canvas and to the right of the input source.

The following screenshot shows the Database Connector operations in the Mule Palette of Anypoint Studio:

Database Connector Operations
Figure 1. Database Connector Operations

Configure a Global Element for the Connector

When you configure a connector, it’s best to configure a global element that all instances of that connector in the app can use. Database Connector can connect to any database for which a JDBC driver is available. To make it easier to connect to the most popular databases (such as MySQL, Oracle, and Microsoft SQL Server), the connector includes a series of different connection types.

To configure the global element for Database Connector, follow these steps:

  1. Select the operation in the Studio canvas.

  2. In the configuration screen for the operation, click the plus sign (+) next to the Connector configuration field to access the global element configuration fields.

  3. On the Database Config window, for Connection select any of the connection types to provide to this configuration:

    • Data Source Reference Connection

    • Derby Connection

    • Generic Connection

    • Microsoft SQL Server Connection

    • MySQL Connection

    • Oracle Connection

  1. On the General tab, specify the database connection information for the connector.

  2. On the Transactions tab, optionally specify the transaction isolation, or XA transactions when connecting to the database.

  3. On the Advanced tab, optionally specify connection pooling and reconnection information, including a reconnection strategy.

  4. Click Test Connection to confirm that Mule can connect with the specified database.

  5. Click OK.

The following screenshot shows the Database Connector Global Element Configuration window in Anypoint Studio:

Database Connector Global Element Configuration
Figure 2. Database Connector Global Element Configuration

View the App Log

To check for problems, you can view the app log as follows:

  • If you’re running the app from Anypoint Platform, the output is visible in the Anypoint Studio console window.

  • If you’re running the app using Mule from the command line, the app log is visible in your OS console.

Unless the log file path is customized in the app’s log file (log4j2.xml), you can also view the app log in the default location MULE_HOME/logs/<app-name>.log.