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https://github.com/moparisthebest/k-9
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Stop service(s) if not in use - Fixes Issue 2777
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@ -17,15 +17,67 @@ import com.fsck.k9.controller.MessagingController;
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import com.fsck.k9.helper.power.TracingPowerManager;
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import com.fsck.k9.helper.power.TracingPowerManager.TracingWakeLock;
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/**
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* Note: All documentation in this file market <CK:RE> is documentation written by Christian Knecht by reverse engineering.
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* This documentation is without warranty and may not be accurate nor reflect the author's original intent.
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*
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* <CK:RE>
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* CoreService is the base class for all K9 Services.
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*
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* An Android service is a way to model a part of an application that needs to accomplish certain tasks without the
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* UI part of the application being necessarily active (of course an application could also be a pure service, without
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* any UI; this is not the case of K9). By declaring a service and starting it, the OS knows that the application has
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* work to do and should avoid killing the process.
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*
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* A service's main purpose is to do some task (usually in the background) which requires one of more threads. The
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* thread that starts the service is the same as the UI thread of the process. It should thus not be used to run
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* the tasks.
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*
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* CoreService is providing the execution plumbing for background tasks including the required thread and task queuing
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* for all K9 services to use.
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*
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* A service is supposed to run only as long as it has some work to do whether that work is active processing or some
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* just some monitoring, like listening on a network port for incoming connections or listing on an open network
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* connection for incoming data (push mechanism).
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*
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* To make sure the service is running only when required, is must be shutdown after tasks are done. As the
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* execution of tasks is abstracted away in this class, it also proper shutdown handling if approriate. If
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* the Service requires this is should call enableAutoShutdown(true) in it's onCreate() method.
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*
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* While a service is running it's tasks, it is usually not a good idea to let the device go to sleep more.
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* WakeLocks are used to avoid this. CoreService provides a central registry (singleton) that can be used
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* application-wide to store WakeLocks.
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*
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* In short, CoreService provides the following features to K9 Services:
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* - task execution and queuing
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* - Service life cycle management (insures the service is stopped when not needed anymore); disabled by default
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* - WakeLock registry and management
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*
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* </CK:RE>
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*/
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public abstract class CoreService extends Service {
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public static String WAKE_LOCK_ID = "com.fsck.k9.service.CoreService.wakeLockId";
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private static ConcurrentHashMap<Integer, TracingWakeLock> wakeLocks = new ConcurrentHashMap<Integer, TracingWakeLock>();
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private static AtomicInteger wakeLockSeq = new AtomicInteger(0);
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private ExecutorService threadPool = null;
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public static String WAKE_LOCK_ID = "com.fsck.k9.service.CoreService.wakeLockId"; // CK:Intent attribute ID
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private static ConcurrentHashMap<Integer, TracingWakeLock> wakeLocks = new ConcurrentHashMap<Integer, TracingWakeLock>(); // CK:WakeLocks registry
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private static AtomicInteger wakeLockSeq = new AtomicInteger(0); // CK:WakeLock registry
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private ExecutorService threadPool = null; // CK:Threadpool with a single thread; used to execute and queue background actions inside the service
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private final String className = getClass().getName();
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private volatile boolean mShutdown = false;
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private volatile boolean mShutdown = false; // CK:A:Seems to be used only when the service is "officially" shutdown to make sure that an exception raise because of the shutdown gets ignored.
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/**
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* CK:BF:2777
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* Controls the auto-shutdown mechanism of the service. The default service life-cycle model is that the service should run
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* only as long as a task is running. If a service should behave differently, disable auto-shutdown.
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*/
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private boolean mAutoShutdown = true;
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/**
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* CK:BF:2777
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* This variable is part of the auto-shutdown feature and determines whether the service has to be shutdown at the
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* end of the onStart() method or not.
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*/
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protected boolean mImmediateShutdown = true; //
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@Override
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public void onCreate() {
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if (K9.DEBUG)
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@ -35,32 +87,70 @@ public abstract class CoreService extends Service {
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}
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protected static void addWakeLockId(Intent i, Integer wakeLockId) {
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/**
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* CK:DocAdded,Refactored without change of logic
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* Adds an existing WakeLock identified by it's WakeLock-ID to the specified Intent.
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* @param i
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* @param wakeLockId
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*/
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protected static void addWakeLockId(Context context, Intent i, Integer wakeLockId, boolean createIfNotExists) {
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if (wakeLockId != null) {
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i.putExtra(BootReceiver.WAKE_LOCK_ID, wakeLockId);
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return;
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}
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if (createIfNotExists)
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addWakeLock(context,i);
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}
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/**
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* CK:DocAdded
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* Adds a new WakeLock to the intent.
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* This will add the WakeLock to the central WakeLock registry managed by this class.
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* @param context Required to be able to create a new wake-lock.
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* @param i Intent to which to add the WakeLock (CK:Q:still unclear why we need to link Intents and WakeLocks)
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*/
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protected static void addWakeLock(Context context, Intent i) {
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TracingPowerManager pm = TracingPowerManager.getPowerManager(context);
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TracingWakeLock wakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "CoreService addWakeLock");
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wakeLock.setReferenceCounted(false);
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wakeLock.acquire(K9.MAIL_SERVICE_WAKE_LOCK_TIMEOUT);
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Integer tmpWakeLockId = wakeLockSeq.getAndIncrement();
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wakeLocks.put(tmpWakeLockId, wakeLock);
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TracingWakeLock wakeLock = acquireWakeLock(context,"CoreService addWakeLock",K9.MAIL_SERVICE_WAKE_LOCK_TIMEOUT); // CK:Q: What this timeout? 30secs seems a bizarre choice. It it's a safeguard it should be longer, if it's to cover the real time required by some operation, it seems too short (though I say this before knowing really what the service is supposed to do)
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Integer tmpWakeLockId = registerWakeLock(wakeLock);
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i.putExtra(WAKE_LOCK_ID, tmpWakeLockId);
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}
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/**
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* CK:Added as result of refactoring; logic is unchanged
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* Register WakeLock and returns its registry-entry-ID
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* @param wakeLock
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* @return
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* AUTHOR chrisk
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*/
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protected static Integer registerWakeLock(TracingWakeLock wakeLock) {
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Integer tmpWakeLockId = wakeLockSeq.getAndIncrement();
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wakeLocks.put(tmpWakeLockId, wakeLock);
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return tmpWakeLockId;
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}
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/**
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* CK:Added as result of refactoring; logic is unchanged
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* Acquires a WakeLock in a K9 standard way
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* @param context
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* @return
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* AUTHOR chrisk
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*/
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protected static TracingWakeLock acquireWakeLock(Context context, String tag, long timeout) {
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TracingPowerManager pm = TracingPowerManager.getPowerManager(context);
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TracingWakeLock wakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, tag);
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wakeLock.setReferenceCounted(false);
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wakeLock.acquire(timeout);
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return wakeLock;
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}
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@Override
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public void onStart(Intent intent, int startId) {
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TracingPowerManager pm = TracingPowerManager.getPowerManager(this);
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TracingWakeLock wakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "CoreService onStart");
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wakeLock.setReferenceCounted(false);
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wakeLock.acquire(K9.MAIL_SERVICE_WAKE_LOCK_TIMEOUT);
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// CK:DocAdded:deprecated method but still used for backwards compatibility with Android version <2.0
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// CK:DocAdded: Manage wake-locks, especially, release any wake-locks held so far and define a new "local" wake lock.
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// Also, because we create a new wakelock, we re-initialize the wakelock timeout and give
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// the service-start code a protection of up to MAIL_SERVICE_WAKE_LOCK_TIMEOUT (currently 30s).
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TracingWakeLock wakeLock = acquireWakeLock(this,"CoreService onStart",K9.MAIL_SERVICE_WAKE_LOCK_TIMEOUT);
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if (K9.DEBUG)
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Log.i(K9.LOG_TAG, "CoreService: " + className + ".onStart(" + intent + ", " + startId);
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@ -81,20 +171,30 @@ public abstract class CoreService extends Service {
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}
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}
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// CK:DocAdded: Run the actual start-code of the service
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mImmediateShutdown = true;
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try {
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super.onStart(intent, startId);
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startService(intent, startId);
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} finally {
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wakeLock.release();
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try{wakeLock.release();} catch (Exception e) {/* ignore */}
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try{if (mAutoShutdown && mImmediateShutdown && startId != -1) stopSelf(startId);} catch (Exception e) {/* ignore */}
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}
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}
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public void execute(Context context, final Runnable runner, int wakeLockTime, final Integer startId) {
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/**
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*
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* @param context
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* @param runner
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* @param wakeLockTime
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* @param startId
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* @return CK:BF:2777: returns whether service-shutdown will actually happen after the task has been executed (or has already been done).
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*/
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public boolean execute(Context context, final Runnable runner, int wakeLockTime, final Integer startId) {
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TracingPowerManager pm = TracingPowerManager.getPowerManager(context);
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final TracingWakeLock wakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "CoreService execute");
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wakeLock.setReferenceCounted(false);
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wakeLock.acquire(wakeLockTime);
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boolean serviceShutdownScheduled = false; // CK:BF:2777
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final TracingWakeLock wakeLock = acquireWakeLock(context,"CoreService execute",wakeLockTime);
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final boolean autoShutdown = mAutoShutdown;
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Runnable myRunner = new Runnable() {
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public void run() {
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@ -107,11 +207,14 @@ public abstract class CoreService extends Service {
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MessagingController.getInstance(getApplication()).systemStatusChanged();
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}
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} finally {
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if (K9.DEBUG)
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Log.d(K9.LOG_TAG, "CoreService (" + className + ") completed Runnable " + runner.hashCode() + " with startId " + startId);
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wakeLock.release();
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if (startId != null) {
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stopSelf(startId);
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try { // CK:BF:2777:Making absolutely sure the service stopping command will be executed
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if (K9.DEBUG)
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Log.d(K9.LOG_TAG, "CoreService (" + className + ") completed Runnable " + runner.hashCode() + " with startId " + startId);
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wakeLock.release();
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} finally {
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if (autoShutdown && startId != null) {
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stopSelf(startId); // CK:BF:2777<-- this is what is meant with "serviceShutdownScheduled"; execution of this line assures proper shutdown of the service once finished
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}
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}
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}
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}
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@ -121,12 +224,14 @@ public abstract class CoreService extends Service {
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Log.e(K9.LOG_TAG, "CoreService.execute (" + className + ") called with no threadPool available; running Runnable " + runner.hashCode() + " in calling thread", new Throwable());
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synchronized (this) {
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myRunner.run();
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serviceShutdownScheduled = startId != null; // CK:BF:2777; In this case it's not actually scheduled, it's already done, but that should never happen anyway
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}
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} else {
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if (K9.DEBUG)
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Log.d(K9.LOG_TAG, "CoreService (" + className + ") queueing Runnable " + runner.hashCode() + " with startId " + startId);
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try {
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threadPool.execute(myRunner);
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serviceShutdownScheduled = startId != null; // CK:BF:2777
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} catch (RejectedExecutionException e) {
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if (!mShutdown) {
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throw e;
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@ -134,12 +239,23 @@ public abstract class CoreService extends Service {
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Log.i(K9.LOG_TAG, "CoreService: " + className + " is shutting down, ignoring rejected execution exception: " + e.getMessage());
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}
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}
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mImmediateShutdown = !serviceShutdownScheduled; // CK:BF:2777
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return serviceShutdownScheduled; // CK:BF:2777
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}
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/**
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* CK:Added
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* To implement by sub-class instead of overriding onStart.
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* This allows CoreService to do start and end operations around the sub-class's start code.
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* Especially, CoreService will protect the start-code with a wake-lock to guarantee the service to have the required resources to do it's work.
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* CK:Q: Is this really useful (the wakelock part)? The real work is happening in the worker-thread anyway. Maybe it is because this makes sure that whatever needs to be started by the service, it can be without being interrupted by the phone going to sleep.
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* @param intent
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* @param startId
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*/
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public abstract void startService(Intent intent, int startId);
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@Override
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public IBinder onBind(Intent arg0) {
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public IBinder onBind(@SuppressWarnings("unused") Intent intent) {
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// TODO Auto-generated method stub
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return null;
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}
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@ -158,4 +274,22 @@ public abstract class CoreService extends Service {
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super.onDestroy();
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// MessagingController.getInstance(getApplication()).removeListener(mListener);
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}
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/**
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* CK:BF:2777
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* @return True if auto-shutdown is enabled
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*/
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protected boolean isAutoShutdown() {
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return mAutoShutdown;
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}
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/**
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* CK:BF:2777
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* Enable of disable auto-shutdown (enabled by default).
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* See {@#mAutoShutdown} for more information.
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* @param autoShutdown
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*/
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protected void setAutoShutdown(boolean autoShutdown) {
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mAutoShutdown = autoShutdown;
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}
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}
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@ -22,6 +22,10 @@ import com.fsck.k9.helper.AutoSyncHelper;
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import com.fsck.k9.mail.Pusher;
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/**
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* Bug-fix 2777:
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* MailService was not properly shutting down when not needed anymore.
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* Flawed shutdown logic has been removed and consolidated into CoreService
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* as the auto-shutdown feature.
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*/
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public class MailService extends CoreService {
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private static final String ACTION_CHECK_MAIL = "com.fsck.k9.intent.action.MAIL_SERVICE_WAKEUP";
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@ -42,10 +46,7 @@ public class MailService extends CoreService {
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Intent i = new Intent();
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i.setClass(context, MailService.class);
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i.setAction(MailService.ACTION_RESET);
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addWakeLockId(i, wakeLockId);
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if (wakeLockId == null) {
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addWakeLock(context, i);
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}
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addWakeLockId(context, i, wakeLockId, true);
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context.startService(i);
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}
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@ -53,10 +54,7 @@ public class MailService extends CoreService {
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Intent i = new Intent();
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i.setClass(context, MailService.class);
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i.setAction(MailService.ACTION_RESTART_PUSHERS);
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addWakeLockId(i, wakeLockId);
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if (wakeLockId == null) {
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addWakeLock(context, i);
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}
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addWakeLockId(context, i, wakeLockId, true);
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context.startService(i);
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}
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@ -64,10 +62,7 @@ public class MailService extends CoreService {
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Intent i = new Intent();
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i.setClass(context, MailService.class);
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i.setAction(MailService.ACTION_RESCHEDULE_POLL);
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addWakeLockId(i, wakeLockId);
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if (wakeLockId == null) {
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addWakeLock(context, i);
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}
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addWakeLockId(context, i, wakeLockId, true);
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context.startService(i);
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}
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@ -75,7 +70,7 @@ public class MailService extends CoreService {
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Intent i = new Intent();
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i.setClass(context, MailService.class);
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i.setAction(MailService.ACTION_CANCEL);
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addWakeLockId(i, wakeLockId);
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addWakeLockId(context, i, wakeLockId, false); // CK:Q: why should we not create a wake lock if one is not already existing like for example in actionReschedulePoll?
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context.startService(i);
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}
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@ -83,7 +78,7 @@ public class MailService extends CoreService {
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Intent i = new Intent();
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i.setClass(context, MailService.class);
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i.setAction(MailService.CONNECTIVITY_CHANGE);
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addWakeLockId(i, wakeLockId);
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addWakeLockId(context, i, wakeLockId, false); // CK:Q: why should we not create a wake lock if one is not already existing like for example in actionReschedulePoll?
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context.startService(i);
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}
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@ -96,7 +91,6 @@ public class MailService extends CoreService {
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@Override
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public void startService(Intent intent, int startId) {
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Integer startIdObj = startId;
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long startTime = System.currentTimeMillis();
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try {
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boolean oldIsSyncDisabled = isSyncDisabled();
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@ -147,45 +141,33 @@ public class MailService extends CoreService {
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if (ACTION_CHECK_MAIL.equals(intent.getAction())) {
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if (K9.DEBUG)
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Log.i(K9.LOG_TAG, "***** MailService *****: checking mail");
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if (hasConnectivity && doBackground) {
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PollService.startService(this);
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}
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reschedulePoll(hasConnectivity, doBackground, startIdObj, false);
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startIdObj = null;
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reschedulePoll(hasConnectivity, doBackground, startId, false); // CK:BF:2777
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} else if (ACTION_CANCEL.equals(intent.getAction())) {
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if (K9.DEBUG)
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Log.v(K9.LOG_TAG, "***** MailService *****: cancel");
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cancel();
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} else if (ACTION_RESET.equals(intent.getAction())) {
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if (K9.DEBUG)
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Log.v(K9.LOG_TAG, "***** MailService *****: reschedule");
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rescheduleAll(hasConnectivity, doBackground, startIdObj);
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startIdObj = null;
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rescheduleAll(hasConnectivity, doBackground, startId); // CK:BF:2777
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} else if (ACTION_RESTART_PUSHERS.equals(intent.getAction())) {
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if (K9.DEBUG)
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Log.v(K9.LOG_TAG, "***** MailService *****: restarting pushers");
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reschedulePushers(hasConnectivity, doBackground, startIdObj);
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startIdObj = null;
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reschedulePushers(hasConnectivity, doBackground, startId); // CK:BF:2777
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} else if (ACTION_RESCHEDULE_POLL.equals(intent.getAction())) {
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if (K9.DEBUG)
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Log.v(K9.LOG_TAG, "***** MailService *****: rescheduling poll");
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reschedulePoll(hasConnectivity, doBackground, startIdObj, true);
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startIdObj = null;
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reschedulePoll(hasConnectivity, doBackground, startId, true); // CK:BF:2777
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} else if (ACTION_REFRESH_PUSHERS.equals(intent.getAction())) {
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if (hasConnectivity && doBackground) {
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refreshPushers(null);
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schedulePushers(startIdObj);
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startIdObj = null;
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schedulePushers(startId); // CK:BF:2777
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}
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} else if (CONNECTIVITY_CHANGE.equals(intent.getAction())) {
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rescheduleAll(hasConnectivity, doBackground, startIdObj);
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startIdObj = null;
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rescheduleAll(hasConnectivity, doBackground, startId); // CK:BF:2777
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||||
if (K9.DEBUG)
|
||||
Log.i(K9.LOG_TAG, "Got connectivity action with hasConnectivity = " + hasConnectivity + ", doBackground = " + doBackground);
|
||||
} else if (CANCEL_CONNECTIVITY_NOTICE.equals(intent.getAction())) {
|
||||
@ -194,9 +176,7 @@ public class MailService extends CoreService {
|
||||
MessagingController.getInstance(getApplication()).systemStatusChanged();
|
||||
}
|
||||
} finally {
|
||||
if (startIdObj != null) {
|
||||
stopSelf(startId);
|
||||
}
|
||||
/* nothing to do */
|
||||
}
|
||||
if (K9.DEBUG)
|
||||
Log.i(K9.LOG_TAG, "MailService.onStart took " + (System.currentTimeMillis() - startTime) + "ms");
|
||||
@ -204,8 +184,7 @@ public class MailService extends CoreService {
|
||||
|
||||
private void rescheduleAll(final boolean hasConnectivity, final boolean doBackground, final Integer startId) {
|
||||
reschedulePoll(hasConnectivity, doBackground, null, true);
|
||||
reschedulePushers(hasConnectivity, doBackground, startId);
|
||||
|
||||
reschedulePushers(hasConnectivity, doBackground, startId); // CK:BF:2777
|
||||
}
|
||||
|
||||
|
||||
@ -228,7 +207,6 @@ public class MailService extends CoreService {
|
||||
private final static String LAST_CHECK_END = "MailService.lastCheckEnd";
|
||||
|
||||
public static void saveLastCheckEnd(Context context) {
|
||||
|
||||
long lastCheckEnd = System.currentTimeMillis();
|
||||
if (K9.DEBUG)
|
||||
Log.i(K9.LOG_TAG, "Saving lastCheckEnd = " + new Date(lastCheckEnd));
|
||||
@ -320,7 +298,6 @@ public class MailService extends CoreService {
|
||||
private void reschedulePushers(final boolean hasConnectivity, final boolean doBackground, final Integer startId) {
|
||||
execute(getApplication(), new Runnable() {
|
||||
public void run() {
|
||||
|
||||
if (K9.DEBUG)
|
||||
Log.i(K9.LOG_TAG, "Rescheduling pushers");
|
||||
stopPushers(null);
|
||||
@ -330,7 +307,6 @@ public class MailService extends CoreService {
|
||||
} else {
|
||||
if (K9.DEBUG) {
|
||||
Log.i(K9.LOG_TAG, "Not scheduling pushers: connectivity? " + hasConnectivity + " -- doBackground? " + doBackground);
|
||||
|
||||
}
|
||||
}
|
||||
|
||||
@ -433,13 +409,11 @@ public class MailService extends CoreService {
|
||||
|
||||
|
||||
@Override
|
||||
public IBinder onBind(Intent intent) {
|
||||
public IBinder onBind(@SuppressWarnings("unused") Intent intent) {
|
||||
return null;
|
||||
}
|
||||
|
||||
public static long getNextPollTime() {
|
||||
return nextCheck;
|
||||
}
|
||||
|
||||
|
||||
}
|
||||
|
@ -27,10 +27,7 @@ public class RemoteControlService extends CoreService {
|
||||
// Intent i = new Intent();
|
||||
i.setClass(context, RemoteControlService.class);
|
||||
i.setAction(RemoteControlService.SET_ACTION);
|
||||
addWakeLockId(i, wakeLockId);
|
||||
if (wakeLockId == null) {
|
||||
addWakeLock(context, i);
|
||||
}
|
||||
addWakeLockId(context, i, wakeLockId, true);
|
||||
context.startService(i);
|
||||
}
|
||||
|
||||
|
@ -114,11 +114,15 @@ public class SleepService extends CoreService {
|
||||
|
||||
@Override
|
||||
public void startService(Intent intent, int startId) {
|
||||
if (intent.getAction().startsWith(ALARM_FIRED)) {
|
||||
Integer id = intent.getIntExtra(LATCH_ID, -1);
|
||||
endSleep(id);
|
||||
try {
|
||||
if (intent.getAction().startsWith(ALARM_FIRED)) {
|
||||
Integer id = intent.getIntExtra(LATCH_ID, -1);
|
||||
endSleep(id);
|
||||
}
|
||||
}
|
||||
finally {
|
||||
stopSelf(startId);
|
||||
}
|
||||
stopSelf(startId);
|
||||
}
|
||||
|
||||
private static class SleepDatum {
|
||||
|
Loading…
Reference in New Issue
Block a user