Extension Manager

Overview

The ExtensionManager is a class made available to us via the @ohif/core project (platform/core). Our application instantiates a single instance of it, and provides a ServicesManager and CommandsManager along with the application's configuration through the appConfig key (optional).

const commandsManager = new CommandsManager();
const servicesManager = new ServicesManager();
const extensionManager = new ExtensionManager({
  commandsManager,
  servicesManager,
  appConfig,
});

Events

The following events get published by the ExtensionManager:

Event	Description
ACTIVE_DATA_SOURCE_CHANGED	Fired when the active data source is changed - either replaced with an entirely different one or the existing active data source gets its definition changed via updateDataSourceConfiguration.

API

The ExtensionManager only has the following public API:

• setActiveDataSource - Sets the active data source for the application
• getDataSources - Returns the registered data sources
• getActiveDataSource - Returns the currently active data source
• getModuleEntry - Returns the module entry by the give id.
• addDataSource - Dynamically adds a data source and optionally sets it as the active data source
• updateDataSourceConfiguration - Updates the configuration of a specified data source (name).
• getDataSourceDef - Gets the data source definition for a particular data source name.

Accessing Modules

We use getModuleEntry in our ViewerLayout logic to find the panels based on the provided IDs in the mode's configuration.

For instance: extensionManager.getModuleEntry("@ohif/extension-measurement-tracking.panelModule.seriesList") accesses the seriesList panel from panelModule of the @ohif/extension-measurement-tracking extension.

const getPanelData = id => {
  const entry = extensionManager.getModuleEntry(id);
  const content = entry.component;

  return {
    iconName: entry.iconName,
    iconLabel: entry.iconLabel,
    label: entry.label,
    name: entry.name,
    content,
  };
};