Yanfeng's life and thought

Tuesday, April 28, 2020

Springboot cron example

package com.auspix.satori.auspixMonitor;

import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.List;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.scheduling.annotation.EnableScheduling;
import org.springframework.scheduling.annotation.Scheduled;

import chan.SinaDataMinProvider;

@SpringBootApplication
@EnableScheduling
public class AuspixMonitorApplication {

private static final Logger log = LoggerFactory.getLogger(AuspixMonitorApplication.class);
private static final SimpleDateFormat dateFormat = new SimpleDateFormat("HH:mm:ss");
public static final String[] RICS = {"sh000001","sz300234","sz300273","sz300636","sz300669","sz300702"};

public static void main(String[] args) {
SpringApplication.run(AuspixMonitorApplication.class, args);
}

@Scheduled(cron = "0 0,15,30,45 9-14 * * ?")
public void monitorMin15() throws Exception {
monitor();
}

@Scheduled(cron = "0 0,5,10,15,20,25,30,35,40,45,50,55 9-14 * * ?")
public void monitorMin5() throws Exception {
monitor();
}

private void monitor() throws Exception {
log.info("monitorMin15, the time is now {}", dateFormat.format(new Date()));
List<String> diResultList = SinaDataMinProvider.monotorDi(RICS);
log.warn(diResultList.toString());
List<String> dingResultList = SinaDataMinProvider.monotorDing(RICS);
log.warn(dingResultList.toString());
}

}

Friday, April 24, 2020

Python (or other programming language) Home work for kids

Python (or other programming language) Home work:
Unit 1:
1. Write/Print "I'm Paul, I'm learning Python" 10000 times
with blank line, all upper case ...
2. Print all numbers between 1 to 2000
print even numbers only, print even numbers which can divide 3
3. Calculate the sum the event numbers from 1 to 1000
4. How many numbers contain 4 in any digits for the number between 1 to 1000 (good, hard to search)

Unit 2:
1. Same with Day 1 but with functions
2. Calculate Fibonacci
3. Put "Rock Paper Scissors" randomly for 10000 times, are they really random? (good)
4. Print the unrecognized Chinese characters in random order
5. Put the unrecognized Chinese characters in a file, and read the file, print the characters in random order to help review

Unit 3:
1. Make a function to convert fahrenheit to celsius, and vice versa
2. Make a function to calculate min/max/avg/mid for a number array
3. Make a function to convert kilometers to miles, and vice versa
4. Make a function to convert liter to galon, and vice versa
5. Make a function to convert meter to centimeter, and vice versa
6. How to make it a module and call later

Unit 4:
The Three Little Pigs
1. Read a text book file, and tell me how many words in this book, which word appears most?
2. Read a text book file, and tell me how many letters in this book, which letter appears most?
3. Read a text book file, and tell me which line is longest line?
4. Read a text book file, and add line length to every line's beginning.

Unit 5:
How to make unit 4 smarter (AI), the input could be
convert 12 km to miles, or convert 3 liter to galon or 300 centimeter to meter

Unit 6:
1. greatest common factor
2. least common multiple

Unit 7:
Frog jumping
How many Friday and 13 during the latest 1000 years?

Unit 8 (File read/write):
Read stock daily data file, add name to every line
Read stock daily data file, calculate percentage, ma5, ma10 and write back to the file

Unit 9 (network and library):
Retrieve all League of Legends champions skins picture and write them into local hard disk, the folder name is organized by the champion name

Unit 10 (database):
1. Save the daily data file of Unit 8 to MongoDB
2. Save all League of Legends skins of Unit 9 to MongoDB

Thursday, April 16, 2020

Remove a file within the dependency jar from moven ear

https://stackoverflow.com/questions/2830837/remove-file-from-dependency-jar-using-maven

Parent pom has multiple children and all children refers to a scheduler task except 1. Child 1 is deployed to VM1 JBoss, child 2 is deployed to VM2 JBoss ..
For JBoss configuration, it contains the item for scheduler tasks (like cron information) which is not needed on child 3. In this case, needs exclude the spring-tasks.xml from the core*.jar.

<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>truezip-maven-plugin</artifactId>
<version>1.2</version>
<executions>
<execution>
<id>remove-****</id>
<goals>
<goal>remove</goal>
</goals>
<phase>package</phase>
<configuration>
<fileset>
<directory>target/***_MDB-${revision}/lib/**Core-${revision}.jar/META-INF/spring/context</directory>
<includes>
<include>**/spring-tasks.xml</include>
</includes>
</fileset>
</configuration>
</execution>
</executions>
</plugin>

Wednesday, March 25, 2020

道德经 -> 股票操作指南

道德经

[原文]

道可道，非常道。名可名，非常名。无，名万物之始；有，名万物之母。故常无，欲以观其妙；常有，欲以观其所徼。此两者同出而异名，同谓之玄，玄之又玄，众妙之门。

[译文]

能表述的股票之道，不是一直不变的。哪怕再有名的，也不是一直不变的（连道指的成份股和股票名字本身，都不是一直不变的）。空仓，是一切的开始（刚开户呢），开始买入持有，是之后一切的根基。所以空仓的时候，要仔细观察是否有机会可以开始慢慢建仓；满仓的时候，要仔细观察是否有应该撤退的信号。买入和卖出，本质一样只是名称不同。它们组合在一起，旋转又旋转（买入又卖出，卖出又买入），是一切盈利的来源。

[原文]

天下皆知美之为美，斯恶已；皆知善之为善，斯不善已。故有无相生，难易相成，长短相形，高下相倾，音声相和，前后相随。是以圣人居无为之事，行不言之教，万物作焉而不辞，生而不有，为而不恃，功成而弗居。夫唯弗居，是以不去。

[译文]

大家都说好的股票，就不再是好的股票；大家都说是利好的消息，就不再是利好消息。所以买入卖出不断变化，盈利难易都是相对的，K线长短形状，上涨和下跌，各种利好利空的消息，操作前后都会跟随而来。所以股神要顺应趋势，不试图指点别人炒股，赚钱了别人自然能看到，任何股票符合条件都可以考虑买入，股票是公司发行的，没必要一直持有做股东，一直观察而不是买入后就不管了，股票拉升结束后不再持有。正因为不再持有，所以能保有盈利，不会被随后的下跌把利润抹去。