From 8f3c5f815289ad078428ad9e406b5a51074c0f31 Mon Sep 17 00:00:00 2001
From: jaysunxiao <jaysunxiao.gmail.com>
Date: Sun, 4 Jul 2021 22:35:27 +0800
Subject: [PATCH] =?UTF-8?q?doc[zfoo]:=20=E6=9B=B4=E6=96=B0=E6=96=87?=
 =?UTF-8?q?=E6=A1=A3?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 doc/视频教程.md                                     | 13 +++++++++++++
 .../com/zfoo/scheduler/manager/SchedulerBus.java    |  5 ++---
 2 files changed, 15 insertions(+), 3 deletions(-)

diff --git a/doc/视频教程.md b/doc/视频教程.md
index 46f509f5..0ed76799 100644
--- a/doc/视频教程.md
+++ b/doc/视频教程.md
@@ -33,6 +33,7 @@ javassist字节码增强，asm，cglib，ByteBuddy，了解
 ### 第四讲
 
 - storage原理讲解
+- 知识点
 
 ```
 通过spring的PathMatchingResourcePatternResolver扫描excel文件位置，有方法可以直接获取Resource
@@ -44,3 +45,15 @@ apache的poi，poi可以解析excel
 ### 第五讲
 
 - Tank项目的运行
+
+### 第六讲
+
+- scheduler原理讲解
+- 知识点
+
+```
+cron表达式的用法
+spring自带的Scheduled和zfoo的Scheduler
+java的线程池，SingleThreadScheduledExecutor，SingleThreadExecutor
+通过spring自带的CronExpression计算下一次cron表达式要执行的时间
+```
\ No newline at end of file
diff --git a/scheduler/src/main/java/com/zfoo/scheduler/manager/SchedulerBus.java b/scheduler/src/main/java/com/zfoo/scheduler/manager/SchedulerBus.java
index bc1e298f..e7fb4d0a 100644
--- a/scheduler/src/main/java/com/zfoo/scheduler/manager/SchedulerBus.java
+++ b/scheduler/src/main/java/com/zfoo/scheduler/manager/SchedulerBus.java
@@ -89,9 +89,8 @@ public abstract class SchedulerBus {
             return;
         }
 
-        /*
-          有人向前调整过机器时间，重新计算scheduler里的triggerTimestamp
-         */
+
+        // 有人向前调整过机器时间，重新计算scheduler里的triggerTimestamp
         // var diff = timestamp - lastTriggerTimestamp;
         if (timestamp < lastTriggerTimestamp) {
             for (SchedulerDefinition schedulerDef : schedulerDefList) {