/*
* Copyright (C) 2018 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 com.example.android.systemupdatersample;
import android.content.Context;
import android.os.UpdateEngine;
import android.os.UpdateEngineCallback;
import android.util.Log;
import com.example.android.systemupdatersample.services.PrepareStreamingService;
import com.example.android.systemupdatersample.util.PayloadSpecs;
import com.example.android.systemupdatersample.util.UpdateEngineErrorCodes;
import com.example.android.systemupdatersample.util.UpdateEngineProperties;
import com.example.android.systemupdatersample.util.UpdaterStates;
import com.google.common.util.concurrent.AtomicDouble;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Optional;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.function.DoubleConsumer;
import java.util.function.IntConsumer;
/**
* Manages the update flow. It has its own state (in memory), separate from
* {@link UpdateEngine}'s state. Asynchronously interacts with the {@link UpdateEngine}.
*/
public class UpdateManager {
private static final String TAG = "UpdateManager";
/** HTTP Header: User-Agent; it will be sent to the server when streaming the payload. */
private static final String HTTP_USER_AGENT = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) "
+ "AppleWebKit/537.36 (KHTML, like Gecko) Chrome/60.0.3112.113 Safari/537.36";
private final UpdateEngine mUpdateEngine;
private final PayloadSpecs mPayloadSpecs;
private AtomicInteger mUpdateEngineStatus =
new AtomicInteger(UpdateEngine.UpdateStatusConstants.IDLE);
private AtomicInteger mEngineErrorCode = new AtomicInteger(UpdateEngineErrorCodes.UNKNOWN);
private AtomicDouble mProgress = new AtomicDouble(0);
private AtomicInteger mState = new AtomicInteger(UpdaterStates.IDLE);
private final UpdateManager.UpdateEngineCallbackImpl
mUpdateEngineCallback = new UpdateManager.UpdateEngineCallbackImpl();
private PayloadSpec mLastPayloadSpec;
private AtomicBoolean mManualSwitchSlotRequired = new AtomicBoolean(true);
private IntConsumer mOnStateChangeCallback = null;
private IntConsumer mOnEngineStatusUpdateCallback = null;
private DoubleConsumer mOnProgressUpdateCallback = null;
private IntConsumer mOnEngineCompleteCallback = null;
private final Object mLock = new Object();
public UpdateManager(UpdateEngine updateEngine, PayloadSpecs payloadSpecs) {
this.mUpdateEngine = updateEngine;
this.mPayloadSpecs = payloadSpecs;
}
/**
* Binds to {@link UpdateEngine}.
*/
public void bind() {
this.mUpdateEngine.bind(mUpdateEngineCallback);
}
/**
* Unbinds from {@link UpdateEngine}.
*/
public void unbind() {
this.mUpdateEngine.unbind();
}
/**
* @return a number from {@code 0.0} to {@code 1.0}.
*/
public float getProgress() {
return (float) this.mProgress.get();
}
/**
* Returns true if manual switching slot is required. Value depends on
* the update config {@code ab_config.force_switch_slot}.
*/
public boolean isManualSwitchSlotRequired() {
return mManualSwitchSlotRequired.get();
}
/**
* Sets SystemUpdaterSample app state change callback. Value of {@code state} will be one
* of the values from {@link UpdaterStates}.
*
* @param onStateChangeCallback a callback with parameter {@code state}.
*/
public void setOnStateChangeCallback(IntConsumer onStateChangeCallback) {
synchronized (mLock) {
this.mOnStateChangeCallback = onStateChangeCallback;
}
}
private Optional<IntConsumer> getOnStateChangeCallback() {
synchronized (mLock) {
return mOnStateChangeCallback == null
? Optional.empty()
: Optional.of(mOnStateChangeCallback);
}
}
/**
* Sets update engine status update callback. Value of {@code status} will
* be one of the values from {@link UpdateEngine.UpdateStatusConstants}.
*
* @param onStatusUpdateCallback a callback with parameter {@code status}.
*/
public void setOnEngineStatusUpdateCallback(IntConsumer onStatusUpdateCallback) {
synchronized (mLock) {
this.mOnEngineStatusUpdateCallback = onStatusUpdateCallback;
}
}
private Optional<IntConsumer> getOnEngineStatusUpdateCallback() {
synchronized (mLock) {
return mOnEngineStatusUpdateCallback == null
? Optional.empty()
: Optional.of(mOnEngineStatusUpdateCallback);
}
}
/**
* Sets update engine payload application complete callback. Value of {@code errorCode} will
* be one of the values from {@link UpdateEngine.ErrorCodeConstants}.
*
* @param onComplete a callback with parameter {@code errorCode}.
*/
public void setOnEngineCompleteCallback(IntConsumer onComplete) {
synchronized (mLock) {
this.mOnEngineCompleteCallback = onComplete;
}
}
private Optional<IntConsumer> getOnEngineCompleteCallback() {
synchronized (mLock) {
return mOnEngineCompleteCallback == null
? Optional.empty()
: Optional.of(mOnEngineCompleteCallback);
}
}
/**
* Sets progress update callback. Progress is a number from {@code 0.0} to {@code 1.0}.
*
* @param onProgressCallback a callback with parameter {@code progress}.
*/
public void setOnProgressUpdateCallback(DoubleConsumer onProgressCallback) {
synchronized (mLock) {
this.mOnProgressUpdateCallback = onProgressCallback;
}
}
private Optional<DoubleConsumer> getOnProgressUpdateCallback() {
synchronized (mLock) {
return mOnProgressUpdateCallback == null
? Optional.empty()
: Optional.of(mOnProgressUpdateCallback);
}
}
/**
* Updates {@link this.mState} and if state is changed,
* it also notifies {@link this.mOnStateChangeCallback}.
*/
private void setUpdaterState(int updaterState) {
int previousState = mState.get();
mState.set(updaterState);
if (previousState != updaterState) {
getOnStateChangeCallback().ifPresent(callback -> callback.accept(updaterState));
}
}
/**
* Requests update engine to stop any ongoing update. If an update has been applied,
* leave it as is.
*
* <p>Sometimes it's possible that the
* update engine would throw an error when the method is called, and the only way to
* handle it is to catch the exception.</p>
*/
public void cancelRunningUpdate() {
try {
mUpdateEngine.cancel();
setUpdaterState(UpdaterStates.IDLE);
} catch (Exception e) {
Log.w(TAG, "UpdateEngine failed to stop the ongoing update", e);
}
}
/**
* Resets update engine to IDLE state. If an update has been applied it reverts it.
*
* <p>Sometimes it's possible that the
* update engine would throw an error when the method is called, and the only way to
* handle it is to catch the exception.</p>
*/
public void resetUpdate() {
try {
mUpdateEngine.resetStatus();
setUpdaterState(UpdaterStates.IDLE);
} catch (Exception e) {
Log.w(TAG, "UpdateEngine failed to reset the update", e);
}
}
/**
* Applies the given update.
*
* <p>UpdateEngine works asynchronously. This method doesn't wait until
* end of the update.</p>
*/
public void applyUpdate(Context context, UpdateConfig config) {
mEngineErrorCode.set(UpdateEngineErrorCodes.UNKNOWN);
setUpdaterState(UpdaterStates.RUNNING);
if (!config.getAbConfig().getForceSwitchSlot()) {
mManualSwitchSlotRequired.set(true);
} else {
mManualSwitchSlotRequired.set(false);
}
if (config.getInstallType() == UpdateConfig.AB_INSTALL_TYPE_NON_STREAMING) {
applyAbNonStreamingUpdate(config);
} else {
applyAbStreamingUpdate(context, config);
}
}
private void applyAbNonStreamingUpdate(UpdateConfig config) {
List<String> extraProperties = prepareExtraProperties(config);
PayloadSpec payload;
try {
payload = mPayloadSpecs.forNonStreaming(config.getUpdatePackageFile());
} catch (IOException e) {
Log.e(TAG, "Error creating payload spec", e);
setUpdaterState(UpdaterStates.ERROR);
return;
}
updateEngineApplyPayload(payload, extraProperties);
}
private void applyAbStreamingUpdate(Context context, UpdateConfig config) {
List<String> extraProperties = prepareExtraProperties(config);
Log.d(TAG, "Starting PrepareStreamingService");
PrepareStreamingService.startService(context, config, (code, payloadSpec) -> {
if (code == PrepareStreamingService.RESULT_CODE_SUCCESS) {
extraProperties.add("USER_AGENT=" + HTTP_USER_AGENT);
config.getStreamingMetadata()
.getAuthorization()
.ifPresent(s -> extraProperties.add("AUTHORIZATION=" + s));
updateEngineApplyPayload(payloadSpec, extraProperties);
} else {
Log.e(TAG, "PrepareStreamingService failed, result code is " + code);
setUpdaterState(UpdaterStates.ERROR);
}
});
}
private List<String> prepareExtraProperties(UpdateConfig config) {
List<String> extraProperties = new ArrayList<>();
if (!config.getAbConfig().getForceSwitchSlot()) {
// Disable switch slot on reboot, which is enabled by default.
// User will enable it manually by clicking "Switch Slot" button on the screen.
extraProperties.add(UpdateEngineProperties.PROPERTY_DISABLE_SWITCH_SLOT_ON_REBOOT);
}
return extraProperties;
}
/**
* Applies given payload.
*
* <p>UpdateEngine works asynchronously. This method doesn't wait until
* end of the update.</p>
*
* <p>It's possible that the update engine throws a generic error, such as upon seeing invalid
* payload properties (which come from OTA packages), or failing to set up the network
* with the given id.</p>
*
* @param payloadSpec contains url, offset and size to {@code PAYLOAD_BINARY_FILE_NAME}
* @param extraProperties additional properties to pass to {@link UpdateEngine#applyPayload}
*/
private void updateEngineApplyPayload(PayloadSpec payloadSpec, List<String> extraProperties) {
mLastPayloadSpec = payloadSpec;
ArrayList<String> properties = new ArrayList<>(payloadSpec.getProperties());
if (extraProperties != null) {
properties.addAll(extraProperties);
}
try {
mUpdateEngine.applyPayload(
payloadSpec.getUrl(),
payloadSpec.getOffset(),
payloadSpec.getSize(),
properties.toArray(new String[0]));
} catch (Exception e) {
Log.e(TAG, "UpdateEngine failed to apply the update", e);
setUpdaterState(UpdaterStates.ERROR);
}
}
/**
* Sets the new slot that has the updated partitions as the active slot,
* which device will boot into next time.
* This method is only supposed to be called after the payload is applied.
*
* Invoking {@link UpdateEngine#applyPayload} with the same payload url, offset, size
* and payload metadata headers doesn't trigger new update. It can be used to just switch
* active A/B slot.
*
* {@link UpdateEngine#applyPayload} might take several seconds to finish, and it will
* invoke callbacks {@link this#onStatusUpdate} and {@link this#onPayloadApplicationComplete)}.
*/
public void setSwitchSlotOnReboot() {
Log.d(TAG, "setSwitchSlotOnReboot invoked");
List<String> extraProperties = new ArrayList<>();
// PROPERTY_SKIP_POST_INSTALL should be passed on to skip post-installation hooks.
extraProperties.add(UpdateEngineProperties.PROPERTY_SKIP_POST_INSTALL);
// It sets property SWITCH_SLOT_ON_REBOOT=1 by default.
// HTTP headers are not required, UpdateEngine is not expected to stream payload.
updateEngineApplyPayload(mLastPayloadSpec, extraProperties);
}
private void onStatusUpdate(int status, float progress) {
int previousStatus = mUpdateEngineStatus.get();
mUpdateEngineStatus.set(status);
mProgress.set(progress);
getOnProgressUpdateCallback().ifPresent(callback -> callback.accept(progress));
if (previousStatus != status) {
getOnEngineStatusUpdateCallback().ifPresent(callback -> callback.accept(status));
}
}
private void onPayloadApplicationComplete(int errorCode) {
Log.d(TAG, "onPayloadApplicationComplete invoked, errorCode=" + errorCode);
mEngineErrorCode.set(errorCode);
if (errorCode == UpdateEngine.ErrorCodeConstants.SUCCESS
|| errorCode == UpdateEngineErrorCodes.UPDATED_BUT_NOT_ACTIVE) {
setUpdaterState(UpdaterStates.FINISHED);
} else if (errorCode != UpdateEngineErrorCodes.USER_CANCELLED) {
setUpdaterState(UpdaterStates.ERROR);
}
getOnEngineCompleteCallback()
.ifPresent(callback -> callback.accept(errorCode));
}
/**
* Helper class to delegate {@code update_engine} callbacks to UpdateManager
*/
class UpdateEngineCallbackImpl extends UpdateEngineCallback {
@Override
public void onStatusUpdate(int status, float percent) {
UpdateManager.this.onStatusUpdate(status, percent);
}
@Override
public void onPayloadApplicationComplete(int errorCode) {
UpdateManager.this.onPayloadApplicationComplete(errorCode);
}
}
}
