Sun Java System Application Server Platform Edition 8.1 2005Q2 Update 2 Developer's Guide

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### Properties

The default property values are tuned for development of JSP files at the cost of performance. To maximize performance, set `jsp-config` properties to these non-default values:

- `development` - `false` (as an alternative, set to `true` and give `modificationTestInterval` a large value)

- `mappedfile` - `false`

- `trimSpaces` - `true`

- `suppressSmap` - `true`

- `fork` - `false` (on Solaris)

- `classdebuginfo` - `false`

The following table describes properties for the `jsp-config` element.

Table A–51 `jsp-config` Properties

Property | Default | Description
--- | --- | ---
`checkInterval` | `0` | If `development` is set to `false` and `checkInterval` is greater than zero, background compilations are enabled. The `checkInterval` is the time in seconds between checks to see if a JSP file needs to be recompiled.
`classdebuginfo` | `true` | Specifies whether the generated Java servlets are compiled with the debug option set (`-g` for `javac`).
`classpath` | created dynamically based on the current web application | Specifies the classpath to use when compiling generated servlets.
`compiler` | `javac` | Specifies the compiler Ant uses to compile JSP files. See the Ant documentation for more information: http://antinstaller.sourceforge.net/manual/manual/
`development` | `true` | If set to `true`, enables development mode, which allows JSP files to be checked for modification. Specify the frequency at which JSPs are checked using the `modificationTestInterval` property.
`dumpSmap` | `false` | If set to `true`, dumps SMAP information for JSR 45 debugging to a file. Set to `false` if `suppressSmap` is `true`.
`enablePooling` | `true` | If set to `true`, tag handler pooling is enabled.
`errorOnUseBeanInvalidClassAttribute` | `false` | If set to `true`, issues an error when the value of the `class` attribute in a `useBean` action is not a valid bean class.
`fork` | `true` | Specifies that Ant forks the compiling of JSP files, using a JVM separate from the one in which Tomcat is running.
`genStrAsCharArray` | `false` | If set to `true`, generates text strings as `char` arrays, which improves performance in some cases.
`ieClassId` | `clsid:8AD9C840-044E-11D1-B3E9-00805F499D93` | Specifies the Java plug-in COM class ID for Internet Explorer. Used by the `<jsp:``plugin>` tags.
`javaEncoding` | `UTF8` | Specifies the encoding for the generated Java servlet. This encoding is passed to the Java compiler that is used to compile the servlet as well. By default, the web container tries to use `UTF8`. If that fails, it tries to use the `javaEncoding` value. For encodings, see: http://java.sun.com/j2se/1.4/docs/guide/intl/encoding.doc.html
`keepgenerated` | `true` | If set to `true`, keeps the generated Java files. If `false`, deletes the Java files.
`mappedfile` | `true` | If set to `true`, generates static content with one print statement per input line, to ease debugging.
`modificationTestInterval` | `0` | Specifies the frequency in seconds at which JSPs are checked for modification. A value of `0` causes the JSP to be checked on every access. Used only if `development` is set to `true`.
`scratchdir` | The default work directory for the web application | Specifies the working directory created for storing all the generated code.
`suppressSmap` | `false` | If set to `true`, generation of SMAP information for JSR 45 debugging is suppressed.
`trimSpaces` | `false` | If set to `true`, trims white spaces in template text between actions or directives.
`usePrecompiled` | `false` | If set to `true`, an accessed JSP file is not compiled. Its precompiled servlet class is used instead. It is assumed that JSP files have been precompiled, and their corresponding servlet classes have been bundled in the web application’s `WEB-INF/lib` or `WEB-INF/classes` directory.
`xpoweredBy` | `true` | If set to `true`, the X-Powered-By response header is added by the generated servlet.

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