IsolatedWorker
public
interface
IsolatedWorker
| android.adservices.ondevicepersonalization.IsolatedWorker |
Interface with methods that need to be implemented to handle requests from the
OnDevicePersonalization service to an IsolatedService. The IsolatedService
creates an instance of IsolatedWorker on each request and calls one of the methods
below, depending the type of the request. The IsolatedService calls the method on a
Binder thread and the IsolatedWorker should offload long running operations to a
worker thread. The IsolatedWorker should use the receiver parameter of each
method to return results. If any of these methods throws a RuntimeException, the
platform treats it as an unrecoverable error in the IsolatedService and ends processing
the request.
Summary
Public methods
onDownloadCompleted
public void onDownloadCompleted (DownloadCompletedInput input, OutcomeReceiver<DownloadCompletedOutput, IsolatedServiceException> receiver)
Handles a completed download. The platform downloads content using the parameters defined in
the package manifest of the IsolatedService, calls this function after the download
is complete, and updates the REMOTE_DATA table from
IsolatedService.getRemoteData(RequestToken) with the result of this method.
| Parameters | |
|---|---|
input |
DownloadCompletedInput: Download handler parameters.
This value cannot be null. |
receiver |
OutcomeReceiver: Callback that receives the result DownloadCompletedOutput or an
IsolatedServiceException.
If this method returns a |
onEvent
public void onEvent (EventInput input, OutcomeReceiver<EventOutput, IsolatedServiceException> receiver)
Handles an event triggered by a request to a platform-provided tracking URL EventUrlProvider that was embedded in the HTML output returned by
onRender(android.adservices.ondevicepersonalization.RenderInput, android.os.OutcomeReceiver). The platform updates the EVENTS table with
EventOutput.getEventLogRecord().
| Parameters | |
|---|---|
input |
EventInput: The parameters needed to compute event data.
This value cannot be null. |
receiver |
OutcomeReceiver: Callback that receives the result EventOutput or an
IsolatedServiceException.
If this method returns a |
onExecute
public void onExecute (ExecuteInput input, OutcomeReceiver<ExecuteOutput, IsolatedServiceException> receiver)
Handles a request from an app. This method is called when an app calls OnDevicePersonalizationManager#execute(ComponentName, PersistableBundle,
java.util.concurrent.Executor, OutcomeReceiver) that refers to a named
IsolatedService.
| Parameters | |
|---|---|
input |
ExecuteInput: Request Parameters from the calling app.
This value cannot be null. |
receiver |
OutcomeReceiver: Callback that receives the result ExecuteOutput or an
IsolatedServiceException. If this method throws a RuntimeException or
returns either null or IsolatedServiceException, the error is indicated
to the calling app as an OnDevicePersonalizationException with error code
OnDevicePersonalizationException.ERROR_ISOLATED_SERVICE_FAILED. To avoid leaking
private data to the calling app, more detailed errors are not reported to the caller.
If the IsolatedService needs to report additional data beyond the error code to
its backend servers, it should populate the logging fields in ExecuteOutput with
the additional error data for logging, and rely on Federated Analytics for the stats. |
onRender
public void onRender (RenderInput input, OutcomeReceiver<RenderOutput, IsolatedServiceException> receiver)
Generates HTML for the results that were returned as a result of
onExecute(android.adservices.ondevicepersonalization.ExecuteInput, android.os.OutcomeReceiver). Called when a client app calls
OnDevicePersonalizationManager.requestSurfacePackage(SurfacePackageToken, IBinder, int, int, int, java.util.concurrent.Executor, OutcomeReceiver).
The platform will render this HTML in an WebView inside a fenced
frame.
| Parameters | |
|---|---|
input |
RenderInput: Parameters for the render request.
This value cannot be null. |
receiver |
OutcomeReceiver: Callback that receives the result RenderOutput or an
IsolatedServiceException.
If this method returns a |
onTrainingExamples
public void onTrainingExamples (TrainingExamplesInput input, OutcomeReceiver<TrainingExamplesOutput, IsolatedServiceException> receiver)
Generate a list of training examples used for federated compute job. The platform will call
this function when a federated compute job starts. The federated compute job is scheduled by
an app through FederatedComputeScheduler.schedule.
| Parameters | |
|---|---|
input |
TrainingExamplesInput: The parameters needed to generate the training example.
This value cannot be null. |
receiver |
OutcomeReceiver: Callback that receives the result TrainingExamplesOutput or an
IsolatedServiceException.
If this method returns a |
onWebTrigger
public void onWebTrigger (WebTriggerInput input, OutcomeReceiver<WebTriggerOutput, IsolatedServiceException> receiver)
Handles a Web Trigger event from a browser. A Web Trigger event occurs when a browser
registers a web trigger event with the OS using the
Attribution and Reporting API. If the data in the web trigger payload indicates that the
event should be forwarded to an IsolatedService, the platform will call this function
with the web trigger data.
| Parameters | |
|---|---|
input |
WebTriggerInput: The parameters needed to process Web Trigger event.
This value cannot be null. |
receiver |
OutcomeReceiver: Callback that receives the result WebTriggerOutput or an
IsolatedServiceException. Should be called with a
WebTriggerOutput object populated with a set of records to be written to the
REQUESTS or EVENTS tables.
If this method returns a |