Where to put #Grab annotation in Grails Service - grails

Question

I have the following groovy code ,and i excute it on grails console plugin . it works fine .
However, i want to reuse it in grails' service.
#Grab( 'net.sourceforge.nekohtml:nekohtml:1.9.18' )
import org.cyberneko.html.parsers.SAXParser
def html = '''<p>
| I wanted to try to <span id="blk1">match</span> the inner part
| of the string<span id="blk2"> between </span> the span tags <span>where</span>
|</p>'''.stripMargin()
def content = new XmlSlurper( new SAXParser() ).parseText( html )
List<String> spans = content.'**'.findAll { it.name() == 'SPAN' && it.#id?.text()?.startsWith( 'blk' ) }*.text()
ATTEMPT1:
import groovy.grape.Grape;
#Grab( 'net.sourceforge.nekohtml:nekohtml:1.9.18' )
class MyService {
//..
}
ERR :
*** java.lang.instrument ASSERTION FAILED ***: "!errorOutstanding" with message can't create byte arrau at ../../../src/share/instrument/JPLISAgent.c line: 793
i tried to put #Grab annotation before method that shall do the code above, i have an error.
i tries to put #Grab before class ,the same result; it's an error also .
Where do i put #Grab annotation .
ATTEMPT2:
When i add the dependency above in BuildConfig.groovy ,
runtime( 'net.sourceforge.nekohtml:nekohtml:1.9.18')
ERR :
i get the following error :
grails> --stacktrace -Dserver.port=9090 run-app
| Packaging Grails application.....
| Error Error running script --stacktrace -Dserver.port=9090 run-app: org/apache/xerces/dom/DeferredElementNSImpl (NOTE: Stack trace has been filtered. Use --verbose to see entire trace.)
java.lang.NoClassDefFoundError: org/apache/xerces/dom/DeferredElementNSImpl
at org.apache.xerces.dom.DeferredDocumentImpl.getNodeObject(Unknown Source)
at org.apache.xerces.dom.DeferredDocumentImpl.synchronizeChildren(Unknown Source)
at org.apache.xerces.dom.CoreDocumentImpl.getDocumentElement(Unknown Source)
at org.springsource.loaded.ri.ReflectiveInterceptor.jlrMethodInvoke(ReflectiveInterceptor.java:1243)
at org.springsource.loaded.ri.ReflectiveInterceptor.jlrMethodInvoke(ReflectiveInterceptor.java:1243)
at _GrailsPackage_groovy$_run_closure5.doCall(_GrailsPackage_groovy:74)
at org.springsource.loaded.ri.ReflectiveInterceptor.jlrMethodInvoke(ReflectiveInterceptor.java:1243)
at org.codehaus.gant.GantMetaClass.invokeMethod(GantMetaClass.java:133)
at org.springsource.loaded.ri.ReflectiveInterceptor.jlrMethodInvoke(ReflectiveInterceptor.java:1243)
at org.codehaus.gant.GantMetaClass.invokeMethod(GantMetaClass.java:133)
at org.codehaus.gant.GantBinding$_initializeGantBinding_closure5_closure16_closure18.doCall(GantBinding.groovy:185)
at org.springsource.loaded.ri.ReflectiveInterceptor.jlrMethodInvoke(ReflectiveInterceptor.java:1243)
at org.codehaus.gant.GantBinding$_initializeGantBinding_closure5_closure16_closure18.doCall(GantBinding.groovy)
at org.springsource.loaded.ri.ReflectiveInterceptor.jlrMethodInvoke(ReflectiveInterceptor.java:1243)
at org.codehaus.gant.GantBinding.withTargetEvent(GantBinding.groovy:90)
at org.codehaus.gant.GantBinding.this$4$withTargetEvent(GantBinding.groovy)
at org.springsource.loaded.ri.ReflectiveInterceptor.jlrMethodInvoke(ReflectiveInterceptor.java:1243)
at org.codehaus.gant.GantBinding$_initializeGantBinding_closure5_closure16.doCall(GantBinding.groovy:185)
at org.springsource.loaded.ri.ReflectiveInterceptor.jlrMethodInvoke(ReflectiveInterceptor.java:1243)
at org.codehaus.gant.GantBinding$_initializeGantBinding_closure5_closure16.doCall(GantBinding.groovy)
at org.springsource.loaded.ri.ReflectiveInterceptor.jlrMethodInvoke(ReflectiveInterceptor.java:1243)
at org.springsource.loaded.ri.ReflectiveInterceptor.jlrMethodInvoke(ReflectiveInterceptor.java:1243)
at org.codehaus.gant.GantMetaClass.invokeMethod(GantMetaClass.java:133)
at _GrailsPackage_groovy$_run_closure2.doCall(_GrailsPackage_groovy:58)
at org.springsource.loaded.ri.ReflectiveInterceptor.jlrMethodInvoke(ReflectiveInterceptor.java:1243)
at org.codehaus.gant.GantMetaClass.invokeMethod(GantMetaClass.java:133)
at org.springsource.loaded.ri.ReflectiveInterceptor.jlrMethodInvoke(ReflectiveInterceptor.java:1243)
at org.codehaus.gant.GantMetaClass.invokeMethod(GantMetaClass.java:133)
at org.codehaus.gant.GantBinding$_initializeGantBinding_closure5_closure16_closure18.doCall(GantBinding.groovy:185)
at org.springsource.loaded.ri.ReflectiveInterceptor.jlrMethodInvoke(ReflectiveInterceptor.java:1243)
at org.codehaus.gant.GantBinding$_initializeGantBinding_closure5_closure16_closure18.doCall(GantBinding.groovy)
at org.springsource.loaded.ri.ReflectiveInterceptor.jlrMethodInvoke(ReflectiveInterceptor.java:1243)
at org.codehaus.gant.GantBinding.withTargetEvent(GantBinding.groovy:90)
at org.codehaus.gant.GantBinding.this$4$withTargetEvent(GantBinding.groovy)
at org.springsource.loaded.ri.ReflectiveInterceptor.jlrMethodInvoke(ReflectiveInterceptor.java:1243)
at org.codehaus.gant.GantBinding$_initializeGantBinding_closure5_closure16.doCall(GantBinding.groovy:185)
at org.springsource.loaded.ri.ReflectiveInterceptor.jlrMethodInvoke(ReflectiveInterceptor.java:1243)
at org.codehaus.gant.GantBinding$_initializeGantBinding_closure5_closure16.doCall(GantBinding.groovy)
at org.springsource.loaded.ri.ReflectiveInterceptor.jlrMethodInvoke(ReflectiveInterceptor.java:1243)
at org.codehaus.gant.GantMetaClass.processClosure(GantMetaClass.java:81)
at org.codehaus.gant.GantMetaClass.processArgument(GantMetaClass.java:95)
at org.codehaus.gant.GantMetaClass.invokeMethod(GantMetaClass.java:128)
at RunApp$_run_closure1.doCall(RunApp.groovy:30)
at org.springsource.loaded.ri.ReflectiveInterceptor.jlrMethodInvoke(ReflectiveInterceptor.java:1243)
at org.codehaus.gant.GantMetaClass.invokeMethod(GantMetaClass.java:133)
at org.springsource.loaded.ri.ReflectiveInterceptor.jlrMethodInvoke(ReflectiveInterceptor.java:1243)
at org.codehaus.gant.GantMetaClass.invokeMethod(GantMetaClass.java:133)
at org.codehaus.gant.GantBinding$_initializeGantBinding_closure5_closure16_closure18.doCall(GantBinding.groovy:185)
at org.springsource.loaded.ri.ReflectiveInterceptor.jlrMethodInvoke(ReflectiveInterceptor.java:1243)
at org.codehaus.gant.GantBinding$_initializeGantBinding_closure5_closure16_closure18.doCall(GantBinding.groovy)
at org.springsource.loaded.ri.ReflectiveInterceptor.jlrMethodInvoke(ReflectiveInterceptor.java:1243)
at org.codehaus.gant.GantBinding.withTargetEvent(GantBinding.groovy:90)
at org.codehaus.gant.GantBinding.this$4$withTargetEvent(GantBinding.groovy)
at org.springsource.loaded.ri.ReflectiveInterceptor.jlrMethodInvoke(ReflectiveInterceptor.java:1243)
at org.codehaus.gant.GantBinding$_initializeGantBinding_closure5_closure16.doCall(GantBinding.groovy:185)
at org.springsource.loaded.ri.ReflectiveInterceptor.jlrMethodInvoke(ReflectiveInterceptor.java:1243)
at org.codehaus.gant.GantBinding$_initializeGantBinding_closure5_closure16.doCall(GantBinding.groovy)
at org.springsource.loaded.ri.ReflectiveInterceptor.jlrMethodInvoke(ReflectiveInterceptor.java:1243)
at gant.Gant$_dispatch_closure5.doCall(Gant.groovy:381)
at org.springsource.loaded.ri.ReflectiveInterceptor.jlrMethodInvoke(ReflectiveInterceptor.java:1243)
at gant.Gant$_dispatch_closure7.doCall(Gant.groovy:415)
at org.springsource.loaded.ri.ReflectiveInterceptor.jlrMethodInvoke(ReflectiveInterceptor.java:1243)
at gant.Gant$_dispatch_closure7.doCall(Gant.groovy)
at org.springsource.loaded.ri.ReflectiveInterceptor.jlrMethodInvoke(ReflectiveInterceptor.java:1243)
at gant.Gant.withBuildListeners(Gant.groovy:427)
at gant.Gant.this$2$withBuildListeners(Gant.groovy)
at gant.Gant$this$2$withBuildListeners.callCurrent(Unknown Source)
at gant.Gant$this$2$withBuildListeners.callCurrent(Unknown Source)
at gant.Gant.dispatch(Gant.groovy:415)
at gant.Gant.this$2$dispatch(Gant.groovy)
at org.springsource.loaded.ri.ReflectiveInterceptor.jlrMethodInvoke(ReflectiveInterceptor.java:1243)
at gant.Gant.invokeMethod(Gant.groovy)
at gant.Gant.executeTargets(Gant.groovy:591)
at org.springsource.loaded.ri.ReflectiveInterceptor.jlrMethodInvoke(ReflectiveInterceptor.java:1243)
at gant.Gant.executeTargets(Gant.groovy:590)
at org.springsource.loaded.ri.ReflectiveInterceptor.jlrMethodInvoke(ReflectiveInterceptor.java:1243)
| Error Error running script --stacktrace -Dserver.port=9090 run-app: org/apache/xerces/dom/DeferredElementNSImpl
ATTEMPT3:
Likewise,adding the dependency in BuildConfig.groovy did not solve the problem.
dependencies {
//....
// .......
compile( 'net.sourceforge.nekohtml:nekohtml:1.9.18'){
excludes 'xercesImpl'
}
}
Reference: http://www.grailsforum.co.uk/showthread.php/2143-New-to-grails-problem-with-JAVA-jar-dependencies#post_message_2323
Even i use the solution above, it works only when compiling.
ATTEMPT4:
I execute the following command to add the dependency ; but in vain :
grails install-dependency net.sourceforge.nekohtml:nekohtml:1.9.18 --dir=lib
ERR
And i get , this error message :
Packaging Grails application.....
| Error Error running script run-app: org/apache/xerces/dom/DeferredElementNSImpl (Use --stacktrace to see the full trace)

Answer 1

Best practices to Put all libraries either :
in lib folder then Refersh , or in
or
in conf/BuildConfig.groovy
Hiowever , if you want to use Grape , Use the following syntax:
import groovy.grape.Grape
Grape.grab(group:'net.sourceforge.nekohtml', module:'nekohtml', version:'1.9.18')
or
groovy.grape.Grape.initGrape()
#Grab(group='net.sourceforge.nekohtml', module='nekohtml', version='1.9.18')
public class MyService{
}