|
|
|
You are here: CodeIdol > Java > JavaServer Pages > page: 15 16 17 18 19 20 21 22 23 24 25 further and incorporated the Perl interpreter. This extension, called mod_perl, allows any Perl program, with some minor modifications, to run as part of the Web server. However, extending the Web server this way is not for the faint of heart! It typically requires a lot of knowledge about the inner details of how the Web server works, as well as very careful programming. If an error causes a CGI to exit prematurely, no harm is done, as the next request will simply start a new one. Even Fast CGIs can typically recover after a crash. But if an extension to the Web server crashes, the whole server is likely to go down. Updating extensions to the Web server is even more difficult than updating a Fast CGI, and only a few system administrators within any given company will typically have the knowledge and permissions to do so. This makes such an extension useful only for adding very fundamental kinds of functions, such as new registration or security features, and not at all well suited to CGI-like applications. Another approach to improving performance was taken by application servers. Application servers combine the best features of Fast CGIs and server extensions. Like Fast CGIs, an application server runs as a separate process and stays running between requests. This eliminates the cost of starting a new program each time. Like server extensions, application servers are extensible, allowing programmers to add new features as needed. This architecture is illustrated in You are here: CodeIdol > Java > JavaServer Pages > page: 15 16 17 18 19 20 21 22 23 24 25 |
Related tags
Popular Categories
|
-
С 2009 года мы стали переводить структура сайта на различные языки. Сайт теперь будет содержать книги не только на английском языке, но также и на других европейских языках, в том числе и на Русском языке.
Русский Polski Francais Deutsch
support sitemap terms
© CodeIdol Labs, 2007 - 2009