No suitable ClassLoader found for grab while Instantiating a class - groovy

Question

I have created two groovy scripts as below. One script has a class which is instantiated in the other script. Both are in default package.
When I'm trying to run ImportGpsData.groovy I'm getting the following exception...
Caught: java.lang.ExceptionInInitializerError
java.lang.ExceptionInInitializerError
at ImportGpsData$_run_closure1.doCall(ImportGpsData.groovy:10)
at ImportGpsData.run(ImportGpsData.groovy:6)
Caused by: java.lang.RuntimeException: No suitable ClassLoader found for grab
at DateParser.<clinit>(DateParser.groovy)
... 2 more
ImportGpsData.groovy
def file = new File('fells_loop.gpx')
def slurper = new XmlSlurper()
def gpx = slurper.parse(file)
gpx.rte.rtept.each {
println it.#lat
println it.#lon
def parser = new DateParser()
println parser.parse(it.time.toString())
}
Dateparser.groovy
#Grapes(
#Grab(group='joda-time', module='joda-time', version='2.3')
)
import org.joda.time.DateTime
import org.joda.time.format.DateTimeFormat
class DateParser {
def String parse(time){
def printableTime = new DateTime(time)
def format = DateTimeFormat.forPattern('MM/dd/yyyy - hh:mm aa')
return printableTime.toString(format)
}
}
I've found some other StackOverFlow questions that dealt with No Suitable classloader found for grab error. One answer suggested using #GrabConfig(systemClassLoader=true) inside #Grapes statement however adding it is resulting in compilation error, I'm getting error unexpected token # in line two.
#Grapes([
#Grab(group='joda-time', module='joda-time', version='2.3')
#GrabConfig( systemClassLoader=true )
])
Above way of using it gave unexpected token # found in line 3...
Adding a comma before #GrabConfig is giving the below error
Multiple markers at this line
- Groovy:Invalid duplicate class definition of class DateParser : The source F:\GroovyEclipses\src\DateParser.groovy contains at least two definitions of the class DateParser.
- General error during conversion: No suitable ClassLoader found for grab java.lang.RuntimeException: No suitable ClassLoader found for grab
After further analysis, I have figured that I'm getting this error when ever I user #Grapes and #Grab in any of my scripts. However I have to use them to work with joda-time.

Answer 1

Not sure if you were able to resolve this, if not then try to compile the class file first:
groovyc Dateparser.groovy
and then do
groovy ImportGpsData.groovy
should work.