I'm building a plugin where I require access to the groovyPagesTemplateEngine outside of a request, but I run into multiple issues when I use g:createLink.
My first implementation pass was this:
String compileGsp(File input) { GrailsWebUtil.bindMockWebRequest((WebApplicationContext) ApplicationHolder.application.mainContext)
StringWriter sw = new StringWriter()
groovyPagesTemplateEngine.createTemplate(input).make().writeTo(sw)
return sw.toString()
}
but I received numerous exceptions about getOut being undefined, grailsApplication being undefined, and request being undefined.
My workaround for now is to modify the ApplicationTagLib metaclass during the compilation, but this doesn't seem clean. Is there any easier way to store and restore the metaclass, or a better fix to use groovyPagesTemplateEngine outside the context of a request?
Here's my current workaround.
String compileGsp(File input) {
StringWriter gspWriter = new StringWriter()
GrailsWebUtil.bindMockWebRequest(grailsApplication.mainContext)
prepareAndWriteGsp(input, gspWriter)
return gspWriter.toString()
}
protected def prepareAndWriteGsp(File input, StringWriter gspWriter) {
prepareApplicationTagLibMetaclass(gspWriter)
try {
groovyPagesTemplateEngine.createTemplate(input).make().writeTo(gspWriter)
}
catch (Exception e) {
throw e
}
finally {
restoreApplicationTagLibMetaclass()
}
}
def applicationTagLibGetOut
def applicationTagLibGrailsApplication
def applicationTagLibRequest
protected void prepareApplicationTagLibMetaclass(StringWriter gspWriter) {
applicationTagLibGetOut = ApplicationTagLib.metaClass.getOut
applicationTagLibGrailsApplication = ApplicationTagLib.metaClass.grailsApplication
applicationTagLibRequest = ApplicationTagLib.metaClass.request
ApplicationTagLib.metaClass.getOut = {-> gspWriter}
ApplicationTagLib.metaClass.grailsApplication = grailsApplication
ApplicationTagLib.metaClass.request = {-> new MockHttpServletRequest()}
}
protected def restoreApplicationTagLibMetaclass() {
ApplicationTagLib.metaClass.getOut = applicationTagLibGetOut
ApplicationTagLib.metaClass.grailsApplication = applicationTagLibGrailsApplication
ApplicationTagLib.metaClass.request = applicationTagLibRequest
}
Locked
