VarResolver

The Microservice API incorporates the Simple Variable Language API. The variable resolver can be augmented through the following methods:

Microservice.Buildervars(Class...)varBean(Class,Object)

A typical usage pattern is shown below:

// $A used in variable resolver.
VarResolver varResolver = Microservice.getInstance().getVarResolver();
System.out.println(varResolver.resolve("Main class is set to $MF{Main-Class, unknown}"));

The variable resolver becomes much more powerful when used in REST resource annotations which will be described latter in juneau-microservice-jetty By default, support for the following variables are provided:

• $S{key[,default]} - SystemPropertiesVar
• $E{key[,default]} - EnvVariablesVar
• $A{key[,default]} - ArgsVar
• $C{key[,default]} - ConfigVar
• $MF{key[,default]} - ManifestFileVar
• $IF{arg,then[,else]} - IfVar
• $SW{arg,pattern1:then1[,pattern2:then2...]} - SwitchVar
• $CO{arg[,arg2...]} - CoalesceVar
• $PM{arg,pattern} - PatternMatchVar
• $UC{arg} - UpperCaseVar
• $LC{arg} - LowerCaseVar
• $NE{arg} - NotEmptyVar