ServiceBackedMeasureClient.kt
/*
* Copyright (C) 2021 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package androidx.health.services.client.impl
import android.content.Context
import androidx.annotation.VisibleForTesting
import androidx.core.content.ContextCompat
import androidx.health.services.client.MeasureCallback
import androidx.health.services.client.MeasureClient
import androidx.health.services.client.data.DataType
import androidx.health.services.client.data.MeasureCapabilities
import androidx.health.services.client.impl.MeasureCallbackStub.MeasureCallbackCache
import androidx.health.services.client.impl.MeasureIpcClient.Companion.getServiceInterface
import androidx.health.services.client.impl.internal.HsConnectionManager
import androidx.health.services.client.impl.internal.StatusCallback
import androidx.health.services.client.impl.ipc.ServiceOperation
import androidx.health.services.client.impl.ipc.internal.ConnectionManager
import androidx.health.services.client.impl.request.CapabilitiesRequest
import androidx.health.services.client.impl.request.MeasureRegistrationRequest
import androidx.health.services.client.impl.request.MeasureUnregistrationRequest
import androidx.health.services.client.impl.response.MeasureCapabilitiesResponse
import com.google.common.util.concurrent.Futures
import com.google.common.util.concurrent.ListenableFuture
import java.util.concurrent.Executor
/**
* [MeasureClient] implementation that is backed by Health Services.
*
* @hide
*/
@VisibleForTesting
public class ServiceBackedMeasureClient(
private val context: Context,
connectionManager: ConnectionManager
) : MeasureClient {
private val ipcClient: MeasureIpcClient = MeasureIpcClient(connectionManager)
override fun registerCallback(
dataType: DataType,
callback: MeasureCallback
): ListenableFuture<Void> {
return registerCallback(dataType, callback, ContextCompat.getMainExecutor(context))
}
override fun registerCallback(
dataType: DataType,
callback: MeasureCallback,
executor: Executor
): ListenableFuture<Void> {
val request = MeasureRegistrationRequest(context.packageName, dataType)
val callbackStub = MeasureCallbackCache.INSTANCE.getOrCreate(dataType, callback, executor)
val serviceOperation =
ServiceOperation<Void> { binder, resultFuture ->
getServiceInterface(binder)
.registerCallback(request, callbackStub, StatusCallback(resultFuture))
}
return ipcClient.registerListener(callbackStub.listenerKey, serviceOperation)
}
override fun unregisterCallback(
dataType: DataType,
callback: MeasureCallback
): ListenableFuture<Void> {
val callbackStub =
MeasureCallbackCache.INSTANCE.remove(dataType, callback)
?: return Futures.immediateFailedFuture(
IllegalArgumentException("Given callback was not registered.")
)
val request = MeasureUnregistrationRequest(context.packageName, dataType)
val serviceOperation =
ServiceOperation<Void> { binder, resultFuture ->
getServiceInterface(binder)
.unregisterCallback(request, callbackStub, StatusCallback(resultFuture))
}
return ipcClient.unregisterListener(callbackStub.listenerKey, serviceOperation)
}
override val capabilities: ListenableFuture<MeasureCapabilities>
get() {
val request = CapabilitiesRequest(context.packageName)
val serviceOperation =
ServiceOperation<MeasureCapabilitiesResponse> { binder, resultFuture ->
resultFuture.set(getServiceInterface(binder).getCapabilities(request))
}
return Futures.transform(
ipcClient.execute(serviceOperation),
{ response -> response?.measureCapabilities },
ContextCompat.getMainExecutor(context)
)
}
internal companion object {
@JvmStatic
fun getClient(context: Context): ServiceBackedMeasureClient {
return ServiceBackedMeasureClient(context, HsConnectionManager.getInstance(context))
}
}
}