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  9 Ways to Create Thread Pools with Java Executors

In Java, the Executors class provides a variety of static factory methods to create different types of thread pools. When learning about thread pools, the Executors class is indispensable. Mastering its usage, principles, and scenarios will enable you to apply it smoothly in actual project development. Here are some commonly used methods, which I will explain one by one: newCachedThreadPool(): Creates a cached thread pool. If a thread has not been used for 60 seconds, it will be terminated and ...

   TUTORIAL,JAVA THREAD     2024-07-19 23:07:09

  Remote execute command in Java example

Frequently there is a need to logon to a remote system and run some commands or programs to get the output, many software can serve this purpose such as putty and gitshell.These software usually provide secure access to the remote system. But have you ever wondered what to do if you need to run commands on many different systems at the same time and get all these results back at a single place? Especially in big data era, many tasks may run on different distributed systems and you want o have a ...

   JSch, Example, Distributed system, SSH2     2014-12-12 03:20:19

  The First Bite on etcd Code

Etcd, one of the crucial components of Kubernetes. If APIServer is the heart, then etcd is the blood vessel that sends the end state of Kubernetes resources to various “organs”, providing high-speed, stable storage, and supporting APIServer’s high load performance. What if the etcd is not working properly? Just the condition as someone has a vascular disease. The deeper you know about them, the better diagnose you can make when issues occur. from unspl...

   SOURCE CODE,ETCD     2022-02-12 01:03:14

  HeartBleed: Inside the heart, what happens to a normal WEB user?

To be brief, our email, IM, facebook etc. are at the risk, so try to minimize the access in these few days. Especially we should try to avoid log into our internet-banking, because we may expose our user id and password. Also later when the service providers fix the bug, we would better to change a new password for all the web accounts that are important to us. Here comes the technical explanation. You might notice before that a lot of websites use URL starting with "https". For example, https:/...

   HeartBleed,Analysis     2014-04-09 22:41:43

  Set up Superset on ubuntu 16.04 LTS

Apache Superset (incubating) is a modern, enterprise-ready business intelligence web application. Compared with business-focused BI tool like Tableau, superset is more technology-navy. It supports more types of visualization and able to work in distributed manner to boost the query performance. Most importantly, it is free of charge! An example dashboard: Let’s go and set it up. Create a virtualenv Assume Anaconda is installed for python management. # create a virtualenv with python 3.6 co...

   TUTORIAL,UBUNTU,SUPERSET     2019-10-19 21:34:55

  Why Apple Mac switches its CPU? The war between Intel and ARM

About three months ago, the new iPad Pro was released and it supports touch pad and mouse. It conveys a clear message to users that they want people to treat iPad Pro as a laptop.  As we know, iPad and iPhone are both using iOS, if iOS can run on laptop,  it means MacOS and iOS can merge and become a unified OS. And if Mac and iPhone can share the same OS, it means the same app can run in all places. It is becoming clearer and clearer that Apple is planning to do this exact thing. Late...

   APPLE,INTEL,ARM,WWDC,A14     2020-06-20 00:19:02

  AOL is the biggest winner of Internet Stocks in 2012

At the beginning of 2012, not many people would think that the best Internet stock is AOL(American Online) in 2012. But now there are only four trading days left in 2012, AOL leads the mainstream technology companies with a 99.8% increase in its share price and firmly sits on the throne of the Year Internet Stock. AllthingsD chooses ten technology companies and their stock market performance in 2012 to do a comparison and gets the above figure. AOL has a 99.8% increase in share price which is a...

   AOL,Stock market     2012-12-27 11:29:17

  Mutli-inheritance bug between python 2.7 and 3.7

When we have run a py3.7 code under py2.x or a py2.x code under 3.x ,if a class do mutli-inheritance from 2 parent and the 2 parents also got inheritance from same parent, the different way to handle inheritance chain between python 2 and 3 will cause some running time bug: Assume we got this sample program inheritTest.py : # Purpose: Test mutli-inheritance different between python2 and 3 # Author: Yuancheng Liu # Created: 2019/05/16 class A: def getVal(self): print("cal...

   PYTHON,PYTHON 3,INHERITANCE     2019-05-16 08:33:52

  Why choosing Carnegie Mellon over Harvard?

Carnegie Mellon and Harvard are both well-known world class universities. They have attracted lots of students all around the world to apply for. But Carnegie Mellon and Harvard are two different types of universities, they have different focus as well. What drives people to choose Carnegie Mellon over Harvard? Yishan Wong, CEO of Reddit gave his opinion on Quora.  Because you can fail out of Carnegie Mellon.  It's well-known that once you get into Harvard, it's very difficult to fail ...

   Carnegie Mello,Harvard     2013-08-08 22:10:11

  Jack Ma retires from Alibaba today

Jack Ma, Alibaba founder and chairman, retires today. Today is the Teacher's day in China and also the 20th anniversary of Alibaba. It's a special day and also a memorable day for all Alibaba employees including employee No.1 Jack Ma. Ma steps down as chairman today as he promised 10 years ago when he was 45. Just a few years back in 2013, he left his position as Alibaba CEO. His successor will be Daniel Zhang who is the current CEO of Alibaba. After today, Jack will start his new life out...

   ALIBABA,RETIREMENT,JACK MA,NEWS,CHAIRMAN     2019-09-10 09:24:43

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