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SamplingProfilerService.javaAPI DocAndroid 5.1 API4713Thu Mar 12 22:22:42 GMT 2015com.android.server

SamplingProfilerService

public class SamplingProfilerService extends android.os.Binder

Fields Summary
private static final String
TAG
private static final boolean
LOCAL_LOGV
public static final String
SNAPSHOT_DIR
private final android.content.Context
mContext
private android.os.FileObserver
snapshotObserver
Constructors Summary
public SamplingProfilerService(android.content.Context context)


       
        mContext = context;
        registerSettingObserver(context);
        startWorking(context);
Methods Summary
protected voiddump(java.io.FileDescriptor fd, java.io.PrintWriter pw, java.lang.String[] args)

        mContext.enforceCallingOrSelfPermission(android.Manifest.permission.DUMP, TAG);

        pw.println("SamplingProfilerService:");
        pw.println("Watching directory: " + SNAPSHOT_DIR);
private voidhandleSnapshotFile(java.io.File file, android.os.DropBoxManager dropbox)

        try {
            dropbox.addFile(TAG, file, 0);
            if (LOCAL_LOGV) Slog.v(TAG, file.getPath() + " added to dropbox");
        } catch (IOException e) {
            Slog.e(TAG, "Can't add " + file.getPath() + " to dropbox", e);
        } finally {
            file.delete();
        }
private voidregisterSettingObserver(android.content.Context context)

        ContentResolver contentResolver = context.getContentResolver();
        contentResolver.registerContentObserver(
                Settings.Global.getUriFor(Settings.Global.SAMPLING_PROFILER_MS),
                false, new SamplingProfilerSettingsObserver(contentResolver));
private voidstartWorking(android.content.Context context)

        if (LOCAL_LOGV) Slog.v(TAG, "starting SamplingProfilerService!");

        final DropBoxManager dropbox =
                (DropBoxManager) context.getSystemService(Context.DROPBOX_SERVICE);

        // before FileObserver is ready, there could have already been some snapshots
        // in the directory, we don't want to miss them
        File[] snapshotFiles = new File(SNAPSHOT_DIR).listFiles();
        for (int i = 0; snapshotFiles != null && i < snapshotFiles.length; i++) {
            handleSnapshotFile(snapshotFiles[i], dropbox);
        }

        // detect new snapshot and put it in dropbox
        // delete it afterwards no matter what happened before
        // Note: needs listening at event ATTRIB rather than CLOSE_WRITE, because we set the
        // readability of snapshot files after writing them!
        snapshotObserver = new FileObserver(SNAPSHOT_DIR, FileObserver.ATTRIB) {
            @Override
            public void onEvent(int event, String path) {
                handleSnapshotFile(new File(SNAPSHOT_DIR, path), dropbox);
            }
        };
        snapshotObserver.startWatching();

        if (LOCAL_LOGV) Slog.v(TAG, "SamplingProfilerService activated");