By Larne Pekowsky
The Jakarta venture involves many robust open resource instruments for the Java platform, yet such a lot lack tutorials or transparent on-line aid documentation. Apache Jakarta and past is the definitive advisor to utilizing Jakarta and different Java open resource instruments to advance net purposes extra successfully and effectively.In this example-packed publication, readers will findAn creation to the philosophy at the back of the Jakarta projectDetails on many ready-to-use Java toolkits, together with Ant, JUnit, Cactus, Log4J, POI, Tomcat, James, Struts, and moreIn-depth directions on tips to boost with a number of toolkitsA consultant to splitting paintings alongside strains of "what is on the market" and "what needs to be written"Best practices for improvement, corresponding to the model/view/controller paradigmNumerous examples that could function templates for readers' personal initiatives"
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Extra info for Apache Jakarta and Beyond: A Java Programmer's Introduction
5 introduces another new feature, the BuildException. Tasks may throw this exception when they have not been given necessary configuration information as is done here or because they were unable to complete for any external reason. In either case, the build will immediately terminate with a "build failed" message that will include the text used to construct the BuildException. Handling filesets is only slightly more difficult than handling primitive values. types package. This addFilset() method will be called once for each fileset constructed from the set in the build file.
Properties If a build file hard-codes the location of a directory in a fileset or path, the build file may not work on a computer other than the one on which it was created. It may also be necessary to fix such build files if a directory structure ever changes over the life of a project. These may or may not be concerns, depending on the nature of the project. A project that is meant to be released in source form, such as Ant itself, must be able to be compiled on any machine, including those with different operating systems.
Javac Javac compiles Java files. The set of files to compile comprises a fileset, which may be specified either explicitly with a nested fileset element or implicitly by naming a top-level directory and specifying includes and excludes as attributes. 38 39 Note that Ant will not compile every file in the resulting fileset, only those that have been updated since the last time they were compiled. This can occasionally cause confusion when compiling files that reside on a remote server. If the clocks on the server and local machine are out of sync, Ant may generate messages about the source files having been modified in the future, or it may not recognize that files have been modified.
Apache Jakarta and Beyond: A Java Programmer's Introduction by Larne Pekowsky