Java | Earn Alliance Docs

This is the Earn Alliance Java SDK

Prerequisites

java 11+
maven build tool

Supported platforms

Any platform capable of running JVM

Installation and Usage

To install the SDK either pull it from our repository:

Maven:

Repository Configuration

<repository>
  <id>github-public</id>
  <url>https://public:&#103;hp_Q9h2STZgRTs3kENG65WeAGSJYhpb7q12W896@maven.pkg.github.com/earn-alliance/earnalliance-java</url>
</repository>

Dependency Configuration

<dependency>
  <groupId>com.earnalliance</groupId>
  <artifactId>earnalliance-java</artifactId>
  <version>1.0.2</version>
</dependency>

Gradle:

Repository Configuration

repositories {
  maven {
    name = "github-public"
    url = uri("https://maven.pkg.github.com/earn-alliance/earnalliance-java")
    credentials {
      username = "public"
      password = "<Your GitHub Credential/Access Token>"
    }
  }
}

Dependency Configuration

implementation("com.earnalliance:earnalliance-java:1.0.2")

Or build it yourself from the source code, simply by cloning the repository and publish the package to the local m2 repository, for example:

Build and publish SDK locally:

Maven:

mvn clean install

Gradle:

./gradlew publishToMavenLocal

Then reference it in your maven dependency management section:

<dependency>
  <groupId>com.earnalliance</groupId>
  <artifactId>earnalliance-java</artifactId>
  <version>1.0.2</version>
</dependency>

Or in your gradle dependency management section:

implementation("com.earnalliance:earnalliance-java:1.0.2")

Initialize

Setup client so it can start sending events!

    var options = NodeOptions.newBuilder()
      .withClientId("[client id]")
      .withClientSecret("[clinet secret]")
      .withGameId("[game id]")
      .withDsn("...")
       //....
      .build();
 
  var alliance = Alliance.init(options);

The client configuration can also be read from environment variables if not provided as an option.

// If the client id, secret, game id and dsn are not specific, the init
// function will by default look for the environment variables
// `ALLIANCE_CLIENT_ID`, `ALLIANCE_CLIENT_SECRET`, `ALLIANCE_GAME_ID` and
// `ALLIANCE_DSN`.
var alliance = Alliance.init();

Set User Identifiers

Whenever a new user identifier is set, or a new user is registered, you can add or update the identifiers associated with the internal user id.

This is used to tell us the user has installed the app and enrich information when more game platform accounts or social accounts are added to help us map the user to the game events.

// This shows all of our currently supported platforms, but you only need to
// provide the identifiers that are relevant for your game.
var identifyingProperties = new IdentifyingProperties();
identifyingProperties.setEmail("[user email]");
identifyingProperties.setDiscordId("[user discord id]");
alliance.setUserIdentifiers("[internal user id]", identifyingProperties);

Note that if you pass any falsey value identifier to setUserIdentifiers, it will be ignored. This is the avoid unintentionally removing previously set identifiers. If you want to remove previously set identifiers, use the removeUserIdentifiers function.

alliance
  .removeUserIdentifiers(identifier, EMAIL, DISCORD_ID)
  .get(5, TimeUnit.SECONDS);

Track User Start Session

Sends standard TRACK event for launching a game. This let's us know that the user has the game launched and is ready to start a challenge.

alliance.startGame("[internal user id]");

Track Events

Tracking events that happens in a game. Tracked events are batched together and sent after 30 seconds interval, or when a batch size of 100 events have accumulated, whichever comes first. Both the interval and the batch size are configurable in the client options.

The name of the events can be almost anything, but we recommend sticking to common terms as shown in the following examples.

// An event without any specific value, commonly used for counting event
// instances, i.e. "Kill X Zombies".
alliance.track("[internal user id]", "KILL_ZOMBIE");
 
// An event with an associated value, commonly used for accumulating or
// checking min / max values, i.e. "Score a total of X" or "Achieve a
// highscore of at least X".
alliance.track("[internal user id]", "SCORE", 100L);
 
// The client can track events for multiple users in parallel.
alliance.track("[internal user id]", "DAMAGE_DONE", 500L);
alliance.track("[another user id]", "DAMAGE_TAKEN", 500L);
 
// Additional traits can be added to the event, which can be used to
// create more detailed challenges, i.e. "Kill X monsters with a knife".
var weaponTrait = Traits.string("weapon", "knife");
var mobTrait = Traits.string("mob", "zombie");
return alliance.track("[internal user id]", "KILL", weaponTrait, mobTrait);

Group Tracked Events

You can group events together, i.e. a game round or a match, whichever makes sense for your game. This allows for natural challenge scopes like "Kill X players in a match".

// Generates unique group id which will be associated with all the events
var round = alliance.startRound("[group id]");
round.track('[internal user id]', 'KILL_ZOMBIE');

Flush event queue

For events that have higher priority (i.e. setUserIdentifiers), instead of initiating a scheduled batch, they trigger the use of an event queue flush. This means that as long as the client has not been flushed prior to the event, the event will be sent to the api right away.

Once the queue has been has been flushed, the client enters a 10 second cooldown period, during which any subsequent calls to flush, will wait for the cooldown to finish, before it's triggered. Not that any normal procedures, like the queue size reaches the batch limit, will still send the events to the api.

The flush function can also be called manually on the client instance, but it is still restricted by the same cooldown mechanic.

alliance.flush();

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