Simon's Blog

Something about Micro Service

2017-11-15

Nowadays, web applications become more and more complex. Some apps become enormous after several generations. Every release is a nightmare for both devs and ops and could last for over a week. The old way to solve this is modularity. Divide the whole application into several modules and then assemble them to form an application. In this way, the logic of the application is separated. When some issues occur, it is much easier to locate them and only modification of some parts of the code instead of the whole application is required.

CAS with Spring Security for both server and client

2016-11-20

CAS(Central Authentication Service) is a good mechanism for having one single point of login to avoid duplicated authentications on different applications using the same credentials.

Web based medical image viewer

2016-09-10

Traditional medical image viewers are either CS based or running on a single machine, but according to the recent work, I have found out the image viewer can also be implemented on web. This approach can exploit the benefit of web based applications, such as cross platform, easy to use(only via browser). Meanwhile, it also has some drawbacks. The major difficulties of a web based image viewer are the performance issues caused by the limited computation power of the browser and the latency of internet transmission.

Something about HTTP session

2016-02-15

As a web developer, you must have often heard about the words, session, cookie, session cookie, XSS, CSRF, etc. They are all related to the HTTP session. If you are confused with all these concepts, this is the right article for you to read.

What is happening, when you open a page

2016-01-12

This article is aimed to give a brief introduction of how different parts of web applications cope with each other to display the content of a web site. The whole flow of the request and response will be described here with an example of a web browser(e.g. Chrome), a web server(e.g. Tomcat) and a database(e.g. Oracle).

Communication between different applications in different languages via Rabbit MQ

2015-11-10

In many scenarios, communication between applications in different languages are required. There are plenty of ways to solve this issue. For example, using Jython to compile the python code into JVM-compatible binary code, so that the code can be called by Java directly. Using messaging to communicate between applications is another way of doing “Remote Procedure Call” or simply pushing a message to the counterpart. Here I want to introduce how to send and receive messages between Java and python via RabbitMQ.

Front-end technologies used in current projects

2015-08-07

Since a couple of months, many front-end technologies have been introduced into our projects. Here I want to summarize some of major changes we did in the past year.

Something about JVM

2015-07-11

As a developer, you must have heard of JVM even though you might not be a Java dev. Whenever you start with a Java related "hello world", the first thing you are asked to do is to install the JDK or JRE. You may wonder the relationship between these concepts or what exactly is JVM, why it is necessary for Java, what do we need to do with it when we develop a Java application. This article will answer all these questions.

Zinan Lin

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