SEARCH KEYWORD -- JAVA CORE


  HTML5 Web Worker

Web Worker is a JavaScript multithreading solution provided by HTML5. we can put some compute intensive codes into Web Worker and it will not hang the user interface. 1. How to use Web Worker Web Worker's basic mechanism is to use Worker to load a JavaScript file to create a new thread in JavaScript's main thread. It will not block other thread's execution and will provide a data exchange interface between main thread and new thread : postMessage() and onmessage. Let's look at an example: //work...

   JavaScript,HTML,Web Worker     2012-12-02 06:25:00

  Why is single threaded Redis so fast

Redis is a high-performance, in-memory key-value database. According to official test reports, it can support around 100,000 QPS (queries per second) on a single machine. However, Redis uses a single-threaded architecture in its design. Why does Redis still have such high performance with a single-threaded design? Wouldn't it be better to use multiple threads for concurrent request processing? In this article, let's explore why Redis has a single-threaded architecture and still maintains its spe...

   REDIS,SINGLE-THREADED,MULTI-THREADING     2023-02-28 05:16:22

  Do you have this kind of comments in your source code?

Writing runnable code is the essential skill of a programmer, writing understandable comment is also a skill a programmer should acquire. There is some famous saying that bad comment is worth than no comment. Usually your code will be maintained by other people, if you provide them some difficult to understand or misguided comments, this will be nightmare to them. While at some other time, programmers may put some funny comments in their codes which may make others laugh. Today we...

   COMMENT,HUMOR     2016-08-01 10:25:14

  JSON in JavaScript

When sending an AJAX request to the server, the response can have two formats : XMLHttpRequest.responseXML to access data with XML format and XMLHttpRequest.responseText to access data with string format. XML is the standard data transfer format, but one weakness is it's troublesome to parse and retrieve the data. JSON(JavaScript Object Notation) is a light weight data interchange format, we call it the JavaScript object representation. The advantage of using JSON as the data format is itself is...

   JSON,JavaScript     2013-05-04 23:25:57

  Failed merge and acquisition cases in the Internet history

Bebo founder sold Bebo with 850 million US dollars in 2008, but later he bought it back with just 1 million US dollars. This news lets us think about those failed merge and acquisition cases in Internet history. Let's summarize some of them here. 1. Bebo Buyer : AOL Acquisition price : 650 million US dollars Sold price : 1 million US dollars Loss: 849 million US dollars In 2008, AOL was still belong to Time Warner. It made a decision to acquire the third largest social networking site Bebo, The...

   Merge and acquisition,Loss,MySpace     2013-07-03 08:37:13

  How Chinese tech websites survive

As a tech site which aims to share knowledge and experience, content is its core value. To attract readers, it needs to produce valuable content and keep the originality of the content. When an article is published on a site, it should be a copyrighted property of that site or the original author while others should be very careful when considering to copy that article to their own site. They should generally avoid to copying the whole content of the article. However, in reality, this is no...

   WEBSITE,COPYRIGHT,CHINESE     2017-08-08 21:54:32

  Spring – Web sockets in Java Development

Experts of java development team are sharing this article with entire java development community. The purpose behind intending this post is to explain spring – Web sockets as a concept to rest of the world. Technology: Web socket is the one of the protocol supported by web-browsers and web-servers. It provides the two-way communication between client and server. It is used in any Java application for providing the two way communication between client and server. It opens a connection betw...

   JAVA DEVELOPMENT,SPRING,JAVA TECHNOLOGY     2016-09-13 03:56:54

  PHP to get long running process progress dynamically

Frequently in web applications, we may have a request to the back end system which may trigger a long running process such as searching huge amount of data or a long running database process. Then the front end webpage may hang and wait for the process to be finished. During this process, if we can provide the user some information about the progress of the back end process, it may improve user experience. Unfortunately, in web applications, this seems not an easy task because web scripting lang...

   AJAX,PHP,progress,long process,demo     2012-06-04 07:29:37

  MaxHeapSize in JVM

MaxHeapSize is an option which is to set the JVM maximum heap size can be allocated. We can specify the MaxHeapSize as VM argument when we run the program by setting -XX:MaxHeapSize=, here can be 2M, 20M, 200M etc. We can also view the current MaxHeapSize set by setting different JVM options. To view the MaxHeapSize, we can use two JVM options : -XX:+PrintFlagsFinal and -XX:+PrintCommandLineFlags. Below is one example when running -XX:+PrintFlagsFinal: bool MaxFDLimit ...

   JVM,MaxHeapSize,Alignment     2014-06-17 07:01:50

  Google CEO : Facebook holds its users hostage

Google CEO Larry Page claimed in a media interview recently that it’s unfortunate that Facebook has been pretty closed with their data while Google is in the business of searching dataPage has been attacking Facebook ban on the search engine to search its data. In fact, the battle between the two sides has been going on for several years, and in June 2011 Google launched its social networking service Google+ which somehow further exacerbated the tension. On Monday, Page, in an interview...

   Google,Facebook,Hostage,Larry Page     2012-05-23 05:58:07

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