Get Professional Java Servlets 2.3 PDF

By Andrew Harbourne-Thomas, Sam Dalton, Simon Brown, Bjarki Holm, Tony Loton, Meeraj Kunnumpurath, Visit Amazon's Subrahmanyam Allamaraju Page, search results, Learn about Author Central, Subrahmanyam Allamaraju, , John Bell, Sing Li

ISBN-10: 186100561X

ISBN-13: 9781861005618

Java servlets are quick changing into essential company parts, as they supply a method to construct scalable and transportable enterprise prone that speak over the net. This publication offers a accomplished advisor to constructing functions in accordance with the Java Servlet 2.3 API, part of the Java 2 Platform, company variation 1.3. The publication unearths how and the place servlets healthy into an firm resolution, and addresses matters akin to safety, scalability, functionality and layout. It walks you thru the API overlaying the function of the entire sessions and interfaces and gives plenty of instance functions to illustrate servlets in motion. The e-book additionally covers the major position that servlets play within the new net companies improvement version. This publication is for Java programmers who're getting into operating with J2EE and wish to profit the best way to follow their talents to create real-world internet elements. wisdom of the Java language and center APIs is thought. An knowing of XMI could be of profit, yet isn't crucial.

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The web application's OrderProcessServlet receives and checks the client credit, and then forwards it to the order manager application 3. The receiving servlet then stores the order in the database and orders any supplies required 4. The order is then acknowledged back to the client 30 Chapter 1: Servlets in the Enterprise Chapter 1: Servlets in the Enterprise 31 5. If the supplier acknowledges the order, the order manager application sets and confirms the order delivery date to the client by e-mail The servlets' role in this application is critical to the e-store's success.

Access may be limited to shared directories, such as log files, so it is good practice to use the log files rather than the console. The location and name of the log file is normally specified on the application configuration, but the exact method is dependent on the container implementation. A word of warning: while in test and pre-production environments verbose logging may be useful, in practice there can be performance implications for frequent logging for active, high-load applications. In production environments we should only be logging important information such as web application errors, security information and other critical information.

Enumeration getParameterNames() To find the value of a specific parameter we call the getParameter() method: public String getParameter(String name) This method returns null if the parameter was not included in the request. If more than one value may be returned for the parameter we should use the getParameterValues() method instead: public String[] getParameterValues(String name) This method returns a String array of values for the specified parameter; we can then iterate through the array to process all the values.

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Professional Java Servlets 2.3 by Andrew Harbourne-Thomas, Sam Dalton, Simon Brown, Bjarki Holm, Tony Loton, Meeraj Kunnumpurath, Visit Amazon's Subrahmanyam Allamaraju Page, search results, Learn about Author Central, Subrahmanyam Allamaraju, , John Bell, Sing Li

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