Move module files to packages/modules/CrashRecovery (5500f12d) · Commits · e / os / android_frameworks_base

packages/CrashRecovery/framework/java/android/service/watchdog/ExplicitHealthCheckService.java

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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.service.watchdog;

		import static android.os.Parcelable.Creator;

		import android.annotation.CallbackExecutor;
		import android.annotation.FlaggedApi;
		import android.annotation.NonNull;
		import android.annotation.Nullable;
		import android.annotation.SdkConstant;
		import android.annotation.SuppressLint;
		import android.annotation.SystemApi;
		import android.app.Service;
		import android.content.Intent;
		import android.content.pm.PackageManager;
		import android.crashrecovery.flags.Flags;
		import android.os.Bundle;
		import android.os.Handler;
		import android.os.IBinder;
		import android.os.Looper;
		import android.os.Parcel;
		import android.os.Parcelable;
		import android.os.RemoteCallback;
		import android.os.RemoteException;
		import android.util.Log;

		import com.android.internal.util.Preconditions;

		import java.util.ArrayList;
		import java.util.List;
		import java.util.Objects;
		import java.util.concurrent.Executor;
		import java.util.concurrent.TimeUnit;
		import java.util.function.Consumer;

		/**
		* A service to provide packages supporting explicit health checks and route checks to these
		* packages on behalf of the package watchdog.
		*
		* <p>To extend this class, you must declare the service in your manifest file with the
		* {@link android.Manifest.permission#BIND_EXPLICIT_HEALTH_CHECK_SERVICE} permission,
		* and include an intent filter with the {@link #SERVICE_INTERFACE} action. In adddition,
		* your implementation must live in
		* {@link PackageManager#getServicesSystemSharedLibraryPackageName()}.
		* For example:</p>
		* <pre>
		* <service android:name=".FooExplicitHealthCheckService"
		* android:exported="true"
		* android:priority="100"
		* android:permission="android.permission.BIND_EXPLICIT_HEALTH_CHECK_SERVICE">
		* <intent-filter>
		* <action android:name="android.service.watchdog.ExplicitHealthCheckService" />
		* </intent-filter>
		* </service>
		* </pre>
		* @hide
		*/
		@SystemApi
		public abstract class ExplicitHealthCheckService extends Service {

		private static final String TAG = "ExplicitHealthCheckService";

		/**
		* {@link Bundle} key for a {@link List} of {@link PackageConfig} value.
		*
		* {@hide}
		*/
		public static final String EXTRA_SUPPORTED_PACKAGES =
		"android.service.watchdog.extra.supported_packages";

		/**
		* {@link Bundle} key for a {@link List} of {@link String} value.
		*
		* {@hide}
		*/
		public static final String EXTRA_REQUESTED_PACKAGES =
		"android.service.watchdog.extra.requested_packages";

		/**
		* {@link Bundle} key for a {@link String} value.
		*/
		@FlaggedApi(Flags.FLAG_ENABLE_CRASHRECOVERY)
		public static final String EXTRA_HEALTH_CHECK_PASSED_PACKAGE =
		"android.service.watchdog.extra.HEALTH_CHECK_PASSED_PACKAGE";

		/**
		* The Intent action that a service must respond to. Add it to the intent filter of the service
		* in its manifest.
		*/
		@SdkConstant(SdkConstant.SdkConstantType.SERVICE_ACTION)
		public static final String SERVICE_INTERFACE =
		"android.service.watchdog.ExplicitHealthCheckService";

		/**
		* The permission that a service must require to ensure that only Android system can bind to it.
		* If this permission is not enforced in the AndroidManifest of the service, the system will
		* skip that service.
		*/
		public static final String BIND_PERMISSION =
		"android.permission.BIND_EXPLICIT_HEALTH_CHECK_SERVICE";

		private final ExplicitHealthCheckServiceWrapper mWrapper =
		new ExplicitHealthCheckServiceWrapper();

		/**
		* Called when the system requests an explicit health check for {@code packageName}.
		*
		* <p> When {@code packageName} passes the check, implementors should call
		* {@link #notifyHealthCheckPassed} to inform the system.
		*
		* <p> It could take many hours before a {@code packageName} passes a check and implementors
		* should never drop requests unless {@link onCancel} is called or the service dies.
		*
		* <p> Requests should not be queued and additional calls while expecting a result for
		* {@code packageName} should have no effect.
		*/
		public abstract void onRequestHealthCheck(@NonNull String packageName);

		/**
		* Called when the system cancels the explicit health check request for {@code packageName}.
		* Should do nothing if there are is no active request for {@code packageName}.
		*/
		public abstract void onCancelHealthCheck(@NonNull String packageName);

		/**
		* Called when the system requests for all the packages supporting explicit health checks. The
		* system may request an explicit health check for any of these packages with
		* {@link #onRequestHealthCheck}.
		*
		* @return all packages supporting explicit health checks
		*/
		@NonNull public abstract List<PackageConfig> onGetSupportedPackages();

		/**
		* Called when the system requests for all the packages that it has currently requested
		* an explicit health check for.
		*
		* @return all packages expecting an explicit health check result
		*/
		@NonNull public abstract List<String> onGetRequestedPackages();

		private final Handler mHandler = Handler.createAsync(Looper.getMainLooper());
		@Nullable private Consumer<Bundle> mHealthCheckResultCallback;
		@Nullable private Executor mCallbackExecutor;

		@Override
		@NonNull
		public final IBinder onBind(@NonNull Intent intent) {
		return mWrapper;
		}

		/**
		* Sets a callback to be invoked when an explicit health check passes for a package.
		* <p>
		* The callback will receive a {@link Bundle} containing the package name that passed the
		* health check, identified by the key {@link #EXTRA_HEALTH_CHECK_PASSED_PACKAGE}.
		* <p>
		* <b>Note:</b> This API is primarily intended for testing purposes. Calling this outside of a
		* test environment will override the default callback mechanism used to notify the system
		* about health check results. Use with caution in production code.
		*
		* @param executor The executor on which the callback should be invoked. If {@code null}, the
		* callback will be executed on the main thread.
		* @param callback A callback that receives a {@link Bundle} containing the package name that
		* passed the health check.
		*/
		@FlaggedApi(Flags.FLAG_ENABLE_CRASHRECOVERY)
		public final void setHealthCheckPassedCallback(@CallbackExecutor @Nullable Executor executor,
		@Nullable Consumer<Bundle> callback) {
		mCallbackExecutor = executor;
		mHealthCheckResultCallback = callback;
		}

		private void executeCallback(@NonNull String packageName) {
		if (mHealthCheckResultCallback != null) {
		Objects.requireNonNull(packageName,
		"Package passing explicit health check must be non-null");
		Bundle bundle = new Bundle();
		bundle.putString(EXTRA_HEALTH_CHECK_PASSED_PACKAGE, packageName);
		mHealthCheckResultCallback.accept(bundle);
		} else {
		Log.wtf(TAG, "System missed explicit health check result for " + packageName);
		}
		}

		/**
		* Implementors should call this to notify the system when explicit health check passes
		* for {@code packageName};
		*/
		public final void notifyHealthCheckPassed(@NonNull String packageName) {
		if (mCallbackExecutor != null) {
		mCallbackExecutor.execute(() -> executeCallback(packageName));
		} else {
		mHandler.post(() -> executeCallback(packageName));
		}
		}

		/**
		* A PackageConfig contains a package supporting explicit health checks and the
		* timeout in {@link System#uptimeMillis} across reboots after which health
		* check requests from clients are failed.
		*
		* @hide
		*/
		@SystemApi
		public static final class PackageConfig implements Parcelable {
		private static final long DEFAULT_HEALTH_CHECK_TIMEOUT_MILLIS = TimeUnit.HOURS.toMillis(1);

		private final String mPackageName;
		private final long mHealthCheckTimeoutMillis;

		/**
		* Creates a new instance.
		*
		* @param packageName the package name
		* @param durationMillis the duration in milliseconds, must be greater than or
		* equal to 0. If it is 0, it will use a system default value.
		*/
		public PackageConfig(@NonNull String packageName, long healthCheckTimeoutMillis) {
		mPackageName = Preconditions.checkNotNull(packageName);
		if (healthCheckTimeoutMillis == 0) {
		mHealthCheckTimeoutMillis = DEFAULT_HEALTH_CHECK_TIMEOUT_MILLIS;
		} else {
		mHealthCheckTimeoutMillis = Preconditions.checkArgumentNonnegative(
		healthCheckTimeoutMillis);
		}
		}

		private PackageConfig(Parcel parcel) {
		mPackageName = parcel.readString();
		mHealthCheckTimeoutMillis = parcel.readLong();
		}

		/**
		* Gets the package name.
		*
		* @return the package name
		*/
		public @NonNull String getPackageName() {
		return mPackageName;
		}

		/**
		* Gets the timeout in milliseconds to evaluate an explicit health check result after a
		* request.
		*
		* @return the duration in {@link System#uptimeMillis} across reboots
		*/
		public long getHealthCheckTimeoutMillis() {
		return mHealthCheckTimeoutMillis;
		}

		@NonNull
		@Override
		public String toString() {
		return "PackageConfig{" + mPackageName + ", " + mHealthCheckTimeoutMillis + "}";
		}

		@Override
		public boolean equals(@Nullable Object other) {
		if (other == this) {
		return true;
		}
		if (!(other instanceof PackageConfig)) {
		return false;
		}

		PackageConfig otherInfo = (PackageConfig) other;
		return Objects.equals(otherInfo.getHealthCheckTimeoutMillis(),
		mHealthCheckTimeoutMillis)
		&& Objects.equals(otherInfo.getPackageName(), mPackageName);
		}

		@Override
		public int hashCode() {
		return Objects.hash(mPackageName, mHealthCheckTimeoutMillis);
		}

		@Override
		public int describeContents() {
		return 0;
		}

		@Override
		public void writeToParcel(@SuppressLint({"MissingNullability"}) Parcel parcel, int flags) {
		parcel.writeString(mPackageName);
		parcel.writeLong(mHealthCheckTimeoutMillis);
		}

		public static final @NonNull Creator<PackageConfig> CREATOR = new Creator<PackageConfig>() {
		@Override
		public PackageConfig createFromParcel(Parcel source) {
		return new PackageConfig(source);
		}

		@Override
		public PackageConfig[] newArray(int size) {
		return new PackageConfig[size];
		}
		};
		}


		private class ExplicitHealthCheckServiceWrapper extends IExplicitHealthCheckService.Stub {
		@Override
		public void setCallback(RemoteCallback callback) throws RemoteException {
		mHandler.post(() -> mHealthCheckResultCallback = callback::sendResult);
		}

		@Override
		public void request(String packageName) throws RemoteException {
		mHandler.post(() -> ExplicitHealthCheckService.this.onRequestHealthCheck(packageName));
		}

		@Override
		public void cancel(String packageName) throws RemoteException {
		mHandler.post(() -> ExplicitHealthCheckService.this.onCancelHealthCheck(packageName));
		}

		@Override
		public void getSupportedPackages(RemoteCallback callback) throws RemoteException {
		mHandler.post(() -> {
		List<PackageConfig> packages =
		ExplicitHealthCheckService.this.onGetSupportedPackages();
		Objects.requireNonNull(packages, "Supported package list must be non-null");
		Bundle bundle = new Bundle();
		bundle.putParcelableArrayList(EXTRA_SUPPORTED_PACKAGES, new ArrayList<>(packages));
		callback.sendResult(bundle);
		});
		}

		@Override
		public void getRequestedPackages(RemoteCallback callback) throws RemoteException {
		mHandler.post(() -> {
		List<String> packages =
		ExplicitHealthCheckService.this.onGetRequestedPackages();
		Objects.requireNonNull(packages, "Requested package list must be non-null");
		Bundle bundle = new Bundle();
		bundle.putStringArrayList(EXTRA_REQUESTED_PACKAGES, new ArrayList<>(packages));
		callback.sendResult(bundle);
		});
		}
		}
		}

packages/CrashRecovery/framework/java/android/service/watchdog/IExplicitHealthCheckService.aidl

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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.service.watchdog;

		import android.os.RemoteCallback;

		/**
		* @hide
		*/
		@PermissionManuallyEnforced
		oneway interface IExplicitHealthCheckService
		{
		void setCallback(in @nullable RemoteCallback callback);
		void request(String packageName);
		void cancel(String packageName);
		void getSupportedPackages(in RemoteCallback callback);
		void getRequestedPackages(in RemoteCallback callback);
		}

packages/CrashRecovery/framework/java/android/service/watchdog/OWNERS

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		narayan@google.com
		nandana@google.com
		olilan@google.com

packages/CrashRecovery/framework/java/android/service/watchdog/PackageConfig.aidl

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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.service.watchdog;

		/**
		* @hide
		*/
		parcelable PackageConfig;