GuardingProfile.java revision d34df829eba68c977ef4c77e3f6830fbbc8d01bf 
1/*
2 * Copyright (C) 2015 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.camera.stats.profiler;
18
19/**
20 * A guarding profile will only write messages to a writer if the
21 * time exceeds a given threshold. For mark() calls, it uses the
22 * time since last event, and for stop() calls it uses the total
23 * elapsed duration of the profile.
24 */
25public class GuardingProfile extends ProfileBase {
26    private final Writer mGuardWriter;
27    private final Writer mVerboseWriter;
28    private final int mMaxMillis;
29
30    public GuardingProfile(Writer writer, Writer verbose, String name,int maxDuration) {
31        super(name);
32        mGuardWriter = writer;
33        mVerboseWriter = verbose;
34        mMaxMillis = maxDuration;
35    }
36
37    @Override
38    protected void onStart() {
39        mVerboseWriter.write(format(0, "GUARD", "START"));
40    }
41
42    @Override
43    protected void onMark(double totalMillis, double lastMillis, String reason) {
44        if (lastMillis > mMaxMillis) {
45            mGuardWriter.write(format(totalMillis, "GUARD", lastMillis, reason));
46        } else {
47            mVerboseWriter.write(format(totalMillis, "GUARD", lastMillis, reason));
48        }
49    }
50
51    @Override
52    protected void onStop(double totalMillis, double lastMillis) {
53        if (totalMillis > mMaxMillis) {
54            mGuardWriter.write(format(totalMillis, "GUARD", "STOP"));
55        } else {
56            mVerboseWriter.write(format(totalMillis, "GUARD",  "STOP"));
57        }
58    }
59
60    @Override
61    protected void onStop(double totalMillis, double lastMillis, String reason) {
62        onMark(totalMillis, lastMillis, reason);
63        onStop(totalMillis, lastMillis);
64    }
65}
66