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Application properties

Many applications intentionally expose configuration files to their users so that they may tweak and dictate the behavior of the application during runtime. In Martini, the <martini-home>/conf/properties/application.properties file is one such file. In this file, we define what we call application properties (sometimes called instance properties) whose values are taken in by Martini, during start-up or runtime, to instruct how Martini should set itself up or to direct how its components should operate.

Example: indicate the location of your Solr cores

Take the solr.mode and solr.url instance properties for example; the value of these properties help Martini determine whether to fetch linked Solr cores from a local, remote, or cloud instance of Solr and the location of that Solr instance (by providing the Solr instance's URL).

Package-local properties

Aside from application properties which are global to an instance, we also have properties that are local to a package. These properties work very much like Martini's properties, except their scope is limited to a package.

Application properties are especially handy because they also help externalize Martini's configuration properties, allowing you to run Martini in different modes or environments without having to do much except for modify the <martini-home>/conf/properties/application.properties file.

You can choose whether to use development or production environment-specific package properties

Packages allow you to have multiple .properties files. For testing purposes, you can have one .properties file specifically for development environments and another for production environments in each of your packages. You can tell Martini which one to use via the package.prefix instance property.

To help you easily go back to using the original configured application properties, and to help make upgrading easier, Martini allows you to leave the standard application.properties file untouched and define values you want to change in an override file. If you would like to restore properties back to their original state, simply remove them altogether from the override file.

By default, the override file is named <martini-home>/conf/properties/override.properties. Add a property to the override file with the same key as the property in the main .properties file to have Martini use the overridden value instead.

What if I want to change the name of the override.properties file?

If you want to use an override file with a different name or location, you must specify the new file via a system property called integrate.override.properties.

To create a system property, look at the toro-martini (if you're using macOS or Linux) or toro-martini.bat (if you're using Windows) file. There are placeholders there and comments that tell you where to add the configuration parameters. These files are in the <martini-home>/bin/ directory.

Restarts may be required

Changes you make in the application .properties file may not reflect immediately unless you restart Martini or reload the properties via the UI. It's a good practice to restart Martini whenever making application-wide property changes.

Editing application properties

There are many ways to modify an instance's application properties:

Via Martini IDE

Editing via the UI

Using any of Martini's editors to edit the application.properties file automatically pushes changes to the underlying override.properties file. If the value has not changed from what is set in the default, its entry will be removed in the override.properties file. The override.properties file needs to exist in order to trigger this behavior.

To modify application properties using Martini Desktop, right click the instance whose application properties you want to modify and then click Edit Martini Properties from the appearing context menu. The <martini-home>/conf/properties/application.properties editor will open.

How to access the application `.properties` file

Another way to access the application.properties file is by locating the conf directory in the core package (visible in the Navigator view), and then double-clicking on the .properties file you wish to edit.

Navigating to the application `.properties` file

Navigating to the application `.properties` file

Via the Martini Runtime Admin UI

To open the application .properties file in the Martini Runtime Admin interface, hover your cursor over the Configuration menu and then select Martini Properties from the sub-menu that appears. You will be redirected to a page where you can then edit the file in the editor.

How to access the application `.properties` file

Via the RESTful API

Martini also provides RESTful endpoints for maintaining application properties. This API allows you to remotely do things such as:

  • Retrieve application properties
  • Add, remove, or update application properties
  • Reload application properties