Once listened to someone: Why is the master always blog, not BBS?
Because they are not willing to make the piano! They published their own opinions and didn't care about the audience.
I like this kind of knight. I like Java's new excellent technology and is willing to try it in actual application. To put this point, I am not very optimistic about the attitude of some programmers to learn new technologies. If the company has something, every time you discuss technical issues, I feel quite hard. If you don't take the initiative to understand the development of technology, it is, just a little more than a year, I don't know if it is enough, it is still quite right! For him, new technology is like hibernate (in October 2003) Is not enough to learn, not to use the current prevaler. It is said that I have a sense of trunk attitude, I don't have to say it now, so I don't have to say it now, and I have a lot of words, he actually said: You are no longer talking to your discussion of technical topics, you are a few!
Prevalyer as a persistent mechanism (memory database). All items are stored in memory.
The efficiency is high, and it is called more than 9000 times higher than Oracle, and it is also based on the time to set the Snapshot (ie, logging log on the hard disk), and reducing it in the back. No need for two days, basically OK, although Prevalyer write operation is slower than the database, but it is also acceptable to a considerable desktop application. Now I use it as a storage program for Local Data, applied to data management and queries in the desktop application developed by SWT, and more than XML is much better. Often the efficiency of our program is required to pass Cache (or Full memory) to solve, and most of most caches are the principle of HashMap, Prevalyer is a variable Cache scheme, which is very good, store commonly used content in the Prevaler object, use the prevalyer management access That is, you don't need to access the database or business layer, the speed is fast, the number is 5000 times more than ORACL, everything is the efficiency and program of memory development, the adaptability is O / R or OO to try to solve one Question, in this point of view, more important significance of Prevayler is that the design of the entity class can be completely unlimited from RDBMS.
