JRE Ampli Wrapper
This page covers the JRE Java and Kotlin runtimes. All (Itly) runtimes have been deprecated. If you are still using an (Itly) runtime, see the migration guide to ugrade to the newest runtime. Docs for the Itly version are available here.
Amplitude Data supports tracking analytics events from JRE programs written in Java (6 and above).
In Java, the tracking library exposes a type-safe function for every event in your team’s tracking plan. The function’s arguments correspond to the event’s properties and are strongly typed to allow for code completion and compile-time checks.
See example apps that use the JRE Java and Kotlin runtimes on GitHub.
These instructions are also available from the Implementation page of your Amplitude Data workspace.
Install the Ampli CLI¶
If you haven't installed the Ampli CLI, install it now.
If you haven't already, install the core Amplitude SDK dependencies.
Pull the SDK into your project¶
At the project root, run
This prompts you to log in to your workspace and select a source.
➜ ampli pull sourcename Ampli project is not initialized. No existing `ampli.json` configuration found. ? Create a new Ampli project here? Yes Organization: Amplitude Workspace: My Workspace Source: sourcename Runtime: JRE - Java Branch: main Pulling latest version (1.0.0)... Tracking library generated successfully. Path: ./src/itly
➜ ampli pull sourcename Ampli project is not initialized. No existing `ampli.json` configuration found. ? Create a new Ampli project here? Yes Organization: Amplitude Workspace: My Workspace Source: sourcename Runtime: JRE - Kotlin Branch: main Pulling latest version (1.0.0)... Tracking library generated successfully. Path: ./src/itly
Initialize Ampli in your code. The
load() method accepts configuration option arguments:
||Optional. Defaults to
||Optional. Specifies whether the Ampli Wrapper does any work. When true, all calls to the Ampli Wrapper are no-ops. Useful in local or development environments.|
||Optional. Defaults to
||Optional. Specifies an Amplitude instance. By default Ampli creates an instance for you.|
||Optional. Specifies an API Key. This option overrides the default, which is the API Key configured in your tracking plan.|
identify() to set user properties.
Just as Ampli creates types for events and their properties, it creates types for user properties.
identify() function accepts an optional
userId, optional user properties, and optional
For example your tracking plan contains a user property called
userProp. The property's type is a string.
The options argument allows you to pass Amplitude fields for this call, such as
This feature is available in Growth and Enterprise accounts with the Accounts add-on.
setGroup() to associate a user with their group (for example, their department or company). The
setGroup() function accepts a required
Amplitude supports assigning users to groups and performing queries, such as Count by Distinct, on those groups. If at least one member of the group has performed the specific event, then the count includes the group.
For example, you want to group your users based on what organization they're in by using an 'orgId'. Joe is in 'orgId' '10', and Sue is in 'orgId' '15'. Sue and Joe both perform a certain event. You can query their organizations in the Event Segmentation Chart.
When setting groups, define a
groupName. In the previous example, 'orgId' is the
groupType and '10' and '15' are the values for
groupName. Another example of a
groupType could be 'sport' with
groupName values like 'tennis' and 'baseball'.
Setting a group also sets the
groupType:groupName as a user property, and overwrites any existing
groupName value set for that user's groupType, and the corresponding user property value.
groupType is a string, and
groupName can be either a string or an array of strings to indicate that a user is in multiple groups.
For example, if Joe is in 'orgId' '10' and '20', then the
groupName is '[10, 20]').
Your code might look like this:
To track an event, call the event's corresponding function. Every event in your tracking plan gets its own function in the Ampli Wrapper. The call is structured like this:
options argument allows you to pass Amplitude fields,
extra argument lets you pass data to middleware.
For example, in the code snippet below, your tracking plan contains an event called
songPlayed. The event is defined with two required properties:
The property type for
songId is string, and
songFavorited is a boolean.
Ampli also generates a class for each event.
Send Event objects using the generic track method.
Verify implementation status¶
Verify that events are implemented in your code with the status command:
To update the implementation status in your tracking plan use the
--update flag or
The output displays status and indicates what events are missing.
Learn more about
Migrating from an Itly JRE Runtime¶
Migrate from an Itly JRE runtime to Ampli by following these steps.
Remove legacy Itly dependencies from your project. This includes anything with a
Add Amplitude dependencies.
Pull the latest Ampli Wrapper.
Check your Ampli Wrapper path.
ampli pullprints the download location of the SDK. If the path contains
itly, you can update the
Pathby hand in the
ampli.jsonfile, or pull again using the
ampli pull -p ./path/to/ampli.
Find and replace:
Kotlin and Java:
import ly.iterative.itly.* => import com.amplitude.ampli.*
See updated Event tracking details on your Implementation page in the web app.