| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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.taobao.weex.tracing; |
| |
| import com.taobao.weex.utils.WXLogUtils; |
| |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.List; |
| |
| /** |
| * Created by moxun on 2017/6/2. |
| */ |
| |
| public class Stopwatch { |
| private static final ThreadLocal<Stopwatch> sThreadLocal = new ThreadLocal<>(); |
| private long startNanos; |
| private List<ProcessEvent> splits = new ArrayList<>(); |
| private long startMillis; |
| |
| private static void prepare() { |
| if (sThreadLocal.get() == null) { |
| sThreadLocal.set(new Stopwatch()); |
| } |
| } |
| |
| public static void tick() { |
| if (WXTracing.isAvailable()) { |
| try { |
| prepare(); |
| if (sThreadLocal.get().startNanos != 0L) { |
| WXLogUtils.w("Stopwatch", "Stopwatch is not reset"); |
| } |
| sThreadLocal.get().startNanos = System.nanoTime(); |
| sThreadLocal.get().startMillis = System.currentTimeMillis(); |
| } catch (Throwable t) { |
| t.printStackTrace(); |
| } |
| } |
| } |
| |
| public static void split(String fname) { |
| if (WXTracing.isAvailable()) { |
| try { |
| ProcessEvent event = new ProcessEvent(); |
| long start = sThreadLocal.get().startMillis; |
| double millis = tackAndTick(); |
| event.fname = fname; |
| event.duration = millis; |
| event.startMillis = start; |
| sThreadLocal.get().splits.add(event); |
| } catch (Throwable throwable) { |
| throwable.printStackTrace(); |
| } |
| } |
| } |
| |
| public static List<ProcessEvent> getProcessEvents() { |
| if (WXTracing.isAvailable()) { |
| tack(); |
| List<ProcessEvent> existedEvents = sThreadLocal.get().splits; |
| sThreadLocal.get().splits = new ArrayList<>(); |
| return existedEvents; |
| } else { |
| return Collections.emptyList(); |
| } |
| } |
| |
| public static double tack() { |
| if (WXTracing.isAvailable()) { |
| try { |
| long startNanos = sThreadLocal.get().startNanos; |
| if (startNanos == 0L) { |
| WXLogUtils.w("Stopwatch", "Should call Stopwatch.tick() before Stopwatch.tack() called"); |
| } |
| long nanos = System.nanoTime() - startNanos; |
| sThreadLocal.get().startNanos = 0L; |
| return nanosToMillis(nanos); |
| } catch (Throwable throwable) { |
| throwable.printStackTrace(); |
| } |
| } |
| return -1; |
| } |
| |
| public static long lastTickStamp() { |
| if (WXTracing.isAvailable()) { |
| try { |
| return sThreadLocal.get().startMillis; |
| } catch (Throwable t) { |
| t.printStackTrace(); |
| } |
| } |
| return -1; |
| } |
| |
| public static double tackAndTick() { |
| double ms = tack(); |
| tick(); |
| return ms; |
| } |
| |
| public static double nanosToMillis(long nanos) { |
| return nanos / 1000000.0; |
| } |
| |
| public static double millisUntilNow(long startNanos) { |
| return nanosToMillis(System.nanoTime() - startNanos); |
| } |
| |
| public static class ProcessEvent { |
| public String fname; |
| public double duration; |
| public long startMillis; |
| } |
| } |