In the above examples we showed a single interpreter instance, however you may wish to use many instances, depending on the application and how you structure your scripts. Interpreter instances are very light weight to create, however if you are going to execute the same script repeatedly and require maximum performance you should consider scripting the code as a method and invoking the scripted method each time on the same interpreter instance (using eval()).
See the BeanShell User's Manual for more information.
Patterns are kept in a {@link RuleStore} which is programmed to store andthen later produce the applicable actions for a given pattern.
The pattern corresponding to a top level <a> element is the string
The pattern corresponding to an element <b> embedded within a top level <a> element is the string
The pattern corresponding to an <b> and any level of nesting is "*/b. Thus, the * character placed at the beginning of a pattern serves as a wildcard for the level of nesting. Conceptually, this is very similar to the API of commons-digester. Joran offers several small advantages. First and foremost, it offers support for implicit actions which result in a significant leap in flexibility. Second, in our opinion better error reporting capability. Third, it is self-reliant. It does not depend on other APIs, in particular commons-logging which is too unreliable. Last but not least, Joran is quite tiny and is expected to remain so. @author Ceki Gülcuü
A flow script defines what is the page flow in an interactive Web application. Usually the flow is defined in a high level programming language which provides the notion of continuations, which allows for the flow of the application to be described as a simple procedural program, without having to think about the application as a finite state machine which changes its internal state on each HTTP request from the client browser.
However an implementation may choose to use its own representation of an application, which may include XML representations of finite state machines. Note: this API has no provision for such implementations.
The component represented by this interface is called in three situations:
From the sitemap, to invoke a top level function defined in a * given implementation language of the flow. This is done from the * sitemap using the construction:
<map:call function="..." language="..."/>
The language attribute can be ignored if the default language is used.
From the sitemap, to continue a previously started computation. A previously started computation is saved in the form of a continuation inside the flow implementation language.
This case is similar with the above one, but the function invoked has a special name, specific to each language implementation. See the language implementation for more information on the function name and the arguments it receives.
From a program in the flow layer. This is done to invoke a pipeline defined in the sitemap, to generate the response of the request.
Patterns are kept in a {@link RuleStore} which is programmed to store andthen later produce the applicable actions for a given pattern.
The pattern corresponding to a top level <a> element is the string
The pattern corresponding to an element <b> embeded within a top level <a> element is the string
The pattern corresponding to an <b> and any level of nesting is "*/b. Thus, the * character placed at the beginning of a pattern serves as a wildcard for the level of nesting. Conceptually, this is very similar to the API of commons-digester. Joran offers several small advantages. First and foremost, it offers support for implicit actions which result in a significant leap in flexibility. Second, in our opinion better error reporting capability. Third, it is self-reliant. It does not depend on other APIs, in particular commons-logging which is a big no-no for log4j. Last but not least, joran is quite tiny and is expected to remain so. @author Ceki Gülcuü
Patterns are kept in a {@link RuleStore} which is programmed to store andthen later produce the applicable actions for a given pattern.
The pattern corresponding to a top level <a> element is the string
The pattern corresponding to an element <b> embeded within a top level <a> element is the string
The pattern corresponding to an <b> and any level of nesting is "*/b. Thus, the * character placed at the beginning of a pattern serves as a wildcard for the level of nesting. Conceptually, this is very similar to the API of commons-digester. Joran offers several small advantages. First and foremost, it offers support for implicit actions which result in a significant leap in flexibility. Second, in our opinion better error reporting capability. Third, it is self-reliant. It does not depend on other APIs, in particular commons-logging which is a big no-no for log4j. Last but not least, joran is quite tiny and is expected to remain so. @author Ceki Gülcuü
Note: we recognize only <%, <\%, %>, %\>, ${ and $\{. Unlike JSP, we don't recognize \${ or \$\{. @author tomyeh
It is easier to implement by extending from {@link org.zkoss.zk.scripting.util.GenericInterpreter}. @author tomyeh
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