From ba6e2cf58e1d4d0ae50fd5d08080e39c2f16090d Mon Sep 17 00:00:00 2001
From: Muhammad Qureshi <muhammadq@google.com>
Date: Mon, 22 Mar 2021 20:26:55 -0700
Subject: [PATCH] Create SystemApi for statsd ready broadcast

The statsd ready broadcast needs to be sent from statsd apex with
Intent.FLAG_RECEIVER_INCLUDE_BACKGROUND flag that is @hide and cannot be
promoted to @SystemApi.
In R, this was worked around by getting the list of registered broadcast
receivers and sending them directed broadcasts to wake them up in
ag/10404099.
However, this is inefficient if there are multiple receivers so this
change creates a SystemApi for sending the actual broadcast with the
flag as recommended in ag/10404099 after it was submitted.

Bug: 150746848
Test: m
Test: flash
Test: ensure broadcast is received via logcat
CTS-Coverage-Bug: 184014462

Change-Id: I5103d8c6e87bdb47930cb7457731050da3d8e566
---
 services/api/current.txt                      |  8 ++++
 services/api/non-updatable-current.txt        |  8 ++++
 .../com/android/server/stats/StatsHelper.java | 45 +++++++++++++++++++
 3 files changed, 61 insertions(+)
 create mode 100644 services/core/java/com/android/server/stats/StatsHelper.java

diff --git a/services/api/current.txt b/services/api/current.txt
index a3e6715207536..a0b1e3349e77e 100644
--- a/services/api/current.txt
+++ b/services/api/current.txt
@@ -105,6 +105,14 @@ package com.android.server.role {
 
 }
 
+package com.android.server.stats {
+
+  public final class StatsHelper {
+    method public static void sendStatsdReadyBroadcast(@NonNull android.content.Context);
+  }
+
+}
+
 package com.android.server.wifi {
 
   public class SupplicantManager {
diff --git a/services/api/non-updatable-current.txt b/services/api/non-updatable-current.txt
index f01c1824116cb..475dcf5eb20e4 100644
--- a/services/api/non-updatable-current.txt
+++ b/services/api/non-updatable-current.txt
@@ -52,6 +52,14 @@ package com.android.server.role {
 
 }
 
+package com.android.server.stats {
+
+  public final class StatsHelper {
+    method public static void sendStatsdReadyBroadcast(@NonNull android.content.Context);
+  }
+
+}
+
 package com.android.server.wifi {
 
   public class SupplicantManager {
diff --git a/services/core/java/com/android/server/stats/StatsHelper.java b/services/core/java/com/android/server/stats/StatsHelper.java
new file mode 100644
index 0000000000000..9b9f6b502f2c5
--- /dev/null
+++ b/services/core/java/com/android/server/stats/StatsHelper.java
@@ -0,0 +1,45 @@
+/*
+ * Copyright (C) 2021 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.android.server.stats;
+
+import static android.app.StatsManager.ACTION_STATSD_STARTED;
+
+import android.annotation.NonNull;
+import android.annotation.SystemApi;
+import android.content.Context;
+import android.content.Intent;
+import android.os.UserHandle;
+
+/**
+ * Provides helper methods for the Statsd APEX
+ *
+ * @hide
+ **/
+@SystemApi(client = SystemApi.Client.SYSTEM_SERVER)
+public final class StatsHelper {
+    private StatsHelper() {}
+
+    /**
+     * Send statsd ready broadcast
+     *
+     **/
+    public static void sendStatsdReadyBroadcast(@NonNull final Context context) {
+        context.sendBroadcastAsUser(
+                new Intent(ACTION_STATSD_STARTED).addFlags(Intent.FLAG_RECEIVER_INCLUDE_BACKGROUND),
+                UserHandle.SYSTEM, android.Manifest.permission.DUMP);
+    }
+}