UsageStats: Reduce log spam during time change

With lots of usage stats files, the log gets spammy
when the time changes and we are moving files around.

Bug:22549399
Change-Id: I9da39399b090066d52568dea6fc5b59aba063c5a

1 files changed, 15 insertions, 4 deletions

diff --git a/services/usage/java/com/android/server/usage/UsageStatsDatabase.java b/services/usage/java/com/android/server/usage/UsageStatsDatabase.java
index 0a7091e..f8ae03f 100644
--- a/services/usage/java/com/android/server/usage/UsageStatsDatabase.java
+++ b/services/usage/java/com/android/server/usage/UsageStatsDatabase.java
@@ -21,6 +21,7 @@ import android.app.usage.UsageStatsManager;
 import android.os.Build;
 import android.util.AtomicFile;
 import android.util.Slog;
+import android.util.TimeUtils;
 
 import java.io.BufferedReader;
 import java.io.BufferedWriter;
@@ -277,14 +278,21 @@ class UsageStatsDatabase {
 
     public void onTimeChanged(long timeDiffMillis) {
         synchronized (mLock) {
+            StringBuilder logBuilder = new StringBuilder();
+            logBuilder.append("Time changed by ");
+            TimeUtils.formatDuration(timeDiffMillis, logBuilder);
+            logBuilder.append(".");
+
+            int filesDeleted = 0;
+            int filesMoved = 0;
+
             for (TimeSparseArray<AtomicFile> files : mSortedStatFiles) {
                 final int fileCount = files.size();
                 for (int i = 0; i < fileCount; i++) {
                     final AtomicFile file = files.valueAt(i);
                     final long newTime = files.keyAt(i) + timeDiffMillis;
                     if (newTime < 0) {
-                        Slog.i(TAG, "Deleting file " + file.getBaseFile().getAbsolutePath()
-                                + " for it is in the future now.");
+                        filesDeleted++;
                         file.delete();
                     } else {
                         try {
@@ -299,14 +307,17 @@ class UsageStatsDatabase {
                         }
 
                         final File newFile = new File(file.getBaseFile().getParentFile(), newName);
-                        Slog.i(TAG, "Moving file " + file.getBaseFile().getAbsolutePath() + " to "
-                                + newFile.getAbsolutePath());
+                        filesMoved++;
                         file.getBaseFile().renameTo(newFile);
                     }
                 }
                 files.clear();
             }
 
+            logBuilder.append(" files deleted: ").append(filesDeleted);
+            logBuilder.append(" files moved: ").append(filesMoved);
+            Slog.i(TAG, logBuilder.toString());
+
             // Now re-index the new files.
             indexFilesLocked();
         }