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DO NOT MERGE Reduce chance of notification listener dropped messages.

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The existing code for notification manager/listeners uses a oneway
binder api to deliver messages. One problem with this is that
notification objects can sometimes get fairly large, and can bump
into the oneway binder transaction buffer if many happen at once.

To reduce this issue, flip the service into a oneway delivery of
a status bar notification holder, whose wrapped content is then
immediately fetched upon receipt of the one-way message. This moves
the meat of the fetch to be over a two-way interface without changing
the properties of which object is actually sent (a tickle solution
with lookup key would have changed this)

Further research: attempt to chunk notification objects themselves.
They can sometimes transfer hundreds of KB over a binder transaction.

Bug: 15426276
Change-Id: Ib1a1f4ff848c16f80bcf2ae4dfd2b87a9091f0b2
This commit is contained in:
Griff Hazen
2014-06-17 20:06:45 -07:00
parent 0bfee5a490
commit 2ea0d3979e
5 changed files with 76 additions and 14 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
Android.mk
View File

@@ -166,6 +166,7 @@ LOCAL_SRC_FILES += \
core/java/android/os/IUserManager.aidl \
core/java/android/os/IVibratorService.aidl \
core/java/android/service/notification/INotificationListener.aidl \
core/java/android/service/notification/IStatusBarNotificationHolder.aidl \
core/java/android/print/ILayoutResultCallback.aidl \
core/java/android/print/IPrinterDiscoveryObserver.aidl \
core/java/android/print/IPrintDocumentAdapter.aidl \

5
core/java/android/service/notification/INotificationListener.aidl
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@@ -16,12 +16,13 @@
package android.service.notification;
import android.service.notification.IStatusBarNotificationHolder;
import android.service.notification.StatusBarNotification;
/** @hide */
oneway interface INotificationListener
{
void onListenerConnected(in String[] notificationKeys);
void onNotificationPosted(in StatusBarNotification notification);
void onNotificationRemoved(in StatusBarNotification notification);
void onNotificationPosted(in IStatusBarNotificationHolder notificationHolder);
void onNotificationRemoved(in IStatusBarNotificationHolder notificationHolder);
}

24
core/java/android/service/notification/IStatusBarNotificationHolder.aidl Normal file
View File

@@ -0,0 +1,24 @@
/**
* Copyright (c) 2014, 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.notification;
import android.service.notification.StatusBarNotification;
/** @hide */
interface IStatusBarNotificationHolder {
StatusBarNotification get();
}

19
core/java/android/service/notification/NotificationListenerService.java
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@@ -22,6 +22,7 @@ import android.app.Service;
import android.content.Context;
import android.content.Intent;
import android.os.IBinder;
import android.os.RemoteException;
import android.os.ServiceManager;
import android.util.Log;
@@ -213,7 +214,14 @@ public abstract class NotificationListenerService extends Service {
private class INotificationListenerWrapper extends INotificationListener.Stub {
@Override
public void onNotificationPosted(StatusBarNotification sbn) {
public void onNotificationPosted(IStatusBarNotificationHolder sbnHolder) {
StatusBarNotification sbn;
try {
sbn = sbnHolder.get();
} catch (RemoteException e) {
Log.w(TAG, "onNotificationPosted: Error receiving StatusBarNotification", e);
return;
}
try {
NotificationListenerService.this.onNotificationPosted(sbn);
} catch (Throwable t) {
@@ -221,7 +229,14 @@ public abstract class NotificationListenerService extends Service {
}
}
@Override
public void onNotificationRemoved(StatusBarNotification sbn) {
public void onNotificationRemoved(IStatusBarNotificationHolder sbnHolder) {
StatusBarNotification sbn;
try {
sbn = sbnHolder.get();
} catch (RemoteException e) {
Log.w(TAG, "onNotificationRemoved: Error receiving StatusBarNotification", e);
return;
}
try {
NotificationListenerService.this.onNotificationRemoved(sbn);
} catch (Throwable t) {

41
services/core/java/com/android/server/notification/NotificationManagerService.java
View File

@@ -59,6 +59,7 @@ import android.os.UserHandle;
import android.os.Vibrator;
import android.provider.Settings;
import android.service.notification.INotificationListener;
import android.service.notification.IStatusBarNotificationHolder;
import android.service.notification.NotificationListenerService;
import android.service.notification.StatusBarNotification;
import android.telephony.TelephonyManager;
@@ -241,21 +242,21 @@ public class NotificationManagerService extends SystemService {
return (nid == UserHandle.USER_ALL || nid == this.userid);
}
public void notifyPostedIfUserMatch(StatusBarNotification sbn) {
if (!enabledAndUserMatches(sbn)) {
public void notifyPostedIfUserMatch(StatusBarNotificationHolder sbnHolder) {
if (!enabledAndUserMatches(sbnHolder.get())) {
return;
}
try {
listener.onNotificationPosted(sbn);
listener.onNotificationPosted(sbnHolder);
} catch (RemoteException ex) {
Log.e(TAG, "unable to notify listener (posted): " + listener, ex);
}
}
public void notifyRemovedIfUserMatch(StatusBarNotification sbn) {
if (!enabledAndUserMatches(sbn)) return;
public void notifyRemovedIfUserMatch(StatusBarNotificationHolder sbnHolder) {
if (!enabledAndUserMatches(sbnHolder.get())) return;
try {
listener.onNotificationRemoved(sbn);
listener.onNotificationRemoved(sbnHolder);
} catch (RemoteException ex) {
Log.e(TAG, "unable to notify listener (removed): " + listener, ex);
}
@@ -711,12 +712,13 @@ public class NotificationManagerService extends SystemService {
*/
void notifyPostedLocked(NotificationRecord n) {
// make a copy in case changes are made to the underlying Notification object
final StatusBarNotification sbn = n.sbn.clone();
final StatusBarNotificationHolder sbnHolder = new StatusBarNotificationHolder(
n.sbn.clone());
for (final NotificationListenerInfo info : mListeners) {
mHandler.post(new Runnable() {
@Override
public void run() {
info.notifyPostedIfUserMatch(sbn);
info.notifyPostedIfUserMatch(sbnHolder);
}});
}
}
@@ -727,13 +729,14 @@ public class NotificationManagerService extends SystemService {
void notifyRemovedLocked(NotificationRecord n) {
// make a copy in case changes are made to the underlying Notification object
// NOTE: this copy is lightweight: it doesn't include heavyweight parts of the notification
final StatusBarNotification sbn_light = n.sbn.cloneLight();
final StatusBarNotificationHolder sbnLightHolder = new StatusBarNotificationHolder(
n.sbn.cloneLight());
for (final NotificationListenerInfo info : mListeners) {
mHandler.post(new Runnable() {
@Override
public void run() {
info.notifyRemovedIfUserMatch(sbn_light);
info.notifyRemovedIfUserMatch(sbnLightHolder);
}});
}
}
@@ -2531,4 +2534,22 @@ public class NotificationManagerService extends SystemService {
updateLightsLocked();
}
}
/**
* Wrapper for a StatusBarNotification object that allows transfer across a oneway
* binder without sending large amounts of data over a oneway transaction.
*/
private static final class StatusBarNotificationHolder
extends IStatusBarNotificationHolder.Stub {
private final StatusBarNotification mValue;
public StatusBarNotificationHolder(StatusBarNotification value) {
mValue = value;
}
@Override
public StatusBarNotification get() {
return mValue;
}
}
}