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/*
* Copyright (C) 2019 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 android.app.role;
import android.Manifest;
import android.annotation.CallbackExecutor;
import android.annotation.NonNull;
import android.annotation.RequiresPermission;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.content.pm.ServiceInfo;
import android.os.Binder;
import android.os.Bundle;
import android.os.Handler;
import android.os.Looper;
import android.os.RemoteCallback;
import android.util.Log;
import android.util.SparseArray;
import com.android.internal.annotations.GuardedBy;
import com.android.internal.infra.AndroidFuture;
import com.android.internal.infra.ServiceConnector;
import java.util.concurrent.Executor;
import java.util.concurrent.TimeUnit;
import java.util.function.Consumer;
/**
* Interface for communicating with the role controller.
*
* @hide
*/
public class RoleControllerManager {
private static final String LOG_TAG = RoleControllerManager.class.getSimpleName();
private static final long REQUEST_TIMEOUT_MILLIS = 15 * 1000;
private static volatile ComponentName sRemoteServiceComponentName;
private static final Object sRemoteServicesLock = new Object();
/**
* Global remote services (per user) used by all {@link RoleControllerManager managers}.
*/
@GuardedBy("sRemoteServicesLock")
private static final SparseArray<ServiceConnector<IRoleController>> sRemoteServices =
new SparseArray<>();
@NonNull
private final ServiceConnector<IRoleController> mRemoteService;
/**
* Initialize the remote service component name once so that we can avoid acquiring the
* PackageManagerService lock in constructor.
*
* @see #createWithInitializedRemoteServiceComponentName(Handler, Context)
*
* @hide
*/
public static void initializeRemoteServiceComponentName(@NonNull Context context) {
sRemoteServiceComponentName = getRemoteServiceComponentName(context);
}
/**
* Create a {@link RoleControllerManager} instance with the initialized remote service component
* name so that we can avoid acquiring the PackageManagerService lock in constructor.
*
* @see #initializeRemoteServiceComponentName(Context)
*
* @hide
*/
@NonNull
public static RoleControllerManager createWithInitializedRemoteServiceComponentName(
@NonNull Handler handler, @NonNull Context context) {
return new RoleControllerManager(sRemoteServiceComponentName, handler, context);
}
private RoleControllerManager(@NonNull ComponentName remoteServiceComponentName,
@NonNull Handler handler, @NonNull Context context) {
synchronized (sRemoteServicesLock) {
int userId = context.getUser().getIdentifier();
ServiceConnector<IRoleController> remoteService = sRemoteServices.get(userId);
if (remoteService == null) {
remoteService = new ServiceConnector.Impl<IRoleController>(
context.getApplicationContext(),
new Intent(RoleControllerService.SERVICE_INTERFACE)
.setComponent(remoteServiceComponentName),
0 /* bindingFlags */, userId, IRoleController.Stub::asInterface) {
@Override
protected Handler getJobHandler() {
return handler;
}
};
sRemoteServices.put(userId, remoteService);
}
mRemoteService = remoteService;
}
}
/**
* @hide
*/
public RoleControllerManager(@NonNull Context context) {
this(getRemoteServiceComponentName(context), new Handler(Looper.getMainLooper()), context);
}
@NonNull
private static ComponentName getRemoteServiceComponentName(@NonNull Context context) {
Intent intent = new Intent(RoleControllerService.SERVICE_INTERFACE);
PackageManager packageManager = context.getPackageManager();
intent.setPackage(packageManager.getPermissionControllerPackageName());
ServiceInfo serviceInfo = packageManager.resolveService(intent, 0).serviceInfo;
return new ComponentName(serviceInfo.packageName, serviceInfo.name);
}
/**
* @see RoleControllerService#onGrantDefaultRoles()
*
* @hide
*/
public void grantDefaultRoles(@NonNull @CallbackExecutor Executor executor,
@NonNull Consumer<Boolean> callback) {
AndroidFuture<Bundle> operation = mRemoteService.postAsync(service -> {
AndroidFuture<Bundle> future = new AndroidFuture<>();
service.grantDefaultRoles(new RemoteCallback(future::complete));
return future;
});
propagateCallback(operation, "grantDefaultRoles", executor, callback);
}
/**
* @see RoleControllerService#onAddRoleHolder(String, String, int)
*
* @hide
*/
public void onAddRoleHolder(@NonNull String roleName, @NonNull String packageName,
@RoleManager.ManageHoldersFlags int flags, @NonNull RemoteCallback callback) {
AndroidFuture<Bundle> operation = mRemoteService.postAsync(service -> {
AndroidFuture<Bundle> future = new AndroidFuture<>();
service.onAddRoleHolder(roleName, packageName, flags,
new RemoteCallback(future::complete));
return future;
});
propagateCallback(operation, "onAddRoleHolder", callback);
}
/**
* @see RoleControllerService#onRemoveRoleHolder(String, String, int)
*
* @hide
*/
public void onRemoveRoleHolder(@NonNull String roleName, @NonNull String packageName,
@RoleManager.ManageHoldersFlags int flags, @NonNull RemoteCallback callback) {
AndroidFuture<Bundle> operation = mRemoteService.postAsync(service -> {
AndroidFuture<Bundle> future = new AndroidFuture<>();
service.onRemoveRoleHolder(roleName, packageName, flags,
new RemoteCallback(future::complete));
return future;
});
propagateCallback(operation, "onRemoveRoleHolder", callback);
}
/**
* @see RoleControllerService#onClearRoleHolders(String, int)
*
* @hide
*/
public void onClearRoleHolders(@NonNull String roleName,
@RoleManager.ManageHoldersFlags int flags, @NonNull RemoteCallback callback) {
AndroidFuture<Bundle> operation = mRemoteService.postAsync(service -> {
AndroidFuture<Bundle> future = new AndroidFuture<>();
service.onClearRoleHolders(roleName, flags,
new RemoteCallback(future::complete));
return future;
});
propagateCallback(operation, "onClearRoleHolders", callback);
}
/**
* @see RoleControllerService#onIsApplicationVisibleForRole(String, String)
*
* @hide
*/
@RequiresPermission(Manifest.permission.MANAGE_ROLE_HOLDERS)
public void isApplicationVisibleForRole(@NonNull String roleName, @NonNull String packageName,
@NonNull @CallbackExecutor Executor executor, @NonNull Consumer<Boolean> callback) {
AndroidFuture<Bundle> operation = mRemoteService.postAsync(service -> {
AndroidFuture<Bundle> future = new AndroidFuture<>();
service.isApplicationVisibleForRole(roleName, packageName,
new RemoteCallback(future::complete));
return future;
});
propagateCallback(operation, "isApplicationVisibleForRole", executor, callback);
}
/**
* @see RoleControllerService#onIsRoleVisible(String)
*
* @hide
*/
@RequiresPermission(Manifest.permission.MANAGE_ROLE_HOLDERS)
public void isRoleVisible(@NonNull String roleName,
@NonNull @CallbackExecutor Executor executor, @NonNull Consumer<Boolean> callback) {
AndroidFuture<Bundle> operation = mRemoteService.postAsync(service -> {
AndroidFuture<Bundle> future = new AndroidFuture<>();
service.isRoleVisible(roleName, new RemoteCallback(future::complete));
return future;
});
propagateCallback(operation, "isRoleVisible", executor, callback);
}
private void propagateCallback(AndroidFuture<Bundle> operation, String opName,
@CallbackExecutor @NonNull Executor executor,
Consumer<Boolean> destination) {
operation.orTimeout(REQUEST_TIMEOUT_MILLIS, TimeUnit.MILLISECONDS)
.whenComplete((res, err) -> executor.execute(() -> {
final long token = Binder.clearCallingIdentity();
try {
if (err != null) {
Log.e(LOG_TAG, "Error calling " + opName + "()", err);
destination.accept(false);
} else {
destination.accept(res != null);
}
} finally {
Binder.restoreCallingIdentity(token);
}
}));
}
private void propagateCallback(AndroidFuture<Bundle> operation, String opName,
RemoteCallback destination) {
operation.orTimeout(REQUEST_TIMEOUT_MILLIS, TimeUnit.MILLISECONDS)
.whenComplete((res, err) -> {
final long token = Binder.clearCallingIdentity();
try {
if (err != null) {
Log.e(LOG_TAG, "Error calling " + opName + "()", err);
destination.sendResult(null);
} else {
destination.sendResult(res);
}
} finally {
Binder.restoreCallingIdentity(token);
}
});
}
}
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