dependencies - Custom Ivy Resolver throws NullPointer Exception in Grails -

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i had following custom resolver defined in repositories{...} block of buildconfig.groovy file jars needed use jai in grails project.

mavenrepo "http://www.mygrid.org.uk/maven/repository" def jbossresolver = new org.apache.ivy.plugins.resolver.urlresolver() jbossresolver.addartifactpattern("https://repository.jboss.org/nexus/content/groups/public-jboss/com/sun/media/[module]/[revision]/[artifact]-[revision].[ext]") jbossresolver.addartifactpattern("https://repository.jboss.org/nexus/content/groups/public-jboss/javax/media/[module]/[revision]/[artifact]-[revision].[ext]") jbossresolver.setname("awesomestjbossresolverever") resolver jbossresolver

however, whenever run grails refresh-dependencies, error:

    compile (         "net.java.dev.jai-imageio:jai-imageio-core-standalone:1.2-pre-dr-b04-2013-04-23",         "javax.media:jai-core:1.1.3",         "com.sun.media:jai-codec:1.1.3"         )

the jai-imageio-core-standalone resolved fine http://www.mygrid.org.uk/maven/repository location, jai-core , jai-codec files kept throwing error:

| error failed resolve dependencies (set log level 'warn' in buildconfig.groovy more information):     - javax.media:jai-core:1.1.3 - com.sun.media:jai-codec:1.1.3

with verbose logging, found error:

tried https://repository.jboss.org/nexus/content/groups/public-jboss/com/sun/media/jai-codec/1.1.3/jai-codec-1.1.3.jar null: no ivy file found com.sun.media#jai-codec;1.1.3: using default data problem occurred while resolving dependency: com.sun.media#jai-codec;1.1.3 {compile=[default]} null: java.lang.nullpointerexception     @ java.util.hashtable.put(hashtable.java:394)     @ java.util.properties.setproperty(properties.java:143)     @ org.apache.ivy.core.cache.defaultrepositorycachemanager.saveresolvers(defaultrepositorycachemanager.java:422)     @ org.apache.ivy.core.cache.defaultrepositorycachemanager.originaltocachedmoduledescriptor(defaultrepositorycachemanager.java:875) ......long stack trace here.........     @ java.lang.reflect.method.invoke(method.java:597)     @ org.codehaus.groovy.grails.cli.support.grailsstarter.rootloader(grailsstarter.java:234)     @ org.codehaus.groovy.grails.cli.support.grailsstarter.main(grailsstarter.java:262)

after reviewing ivy resolver documentation , defaultrepositorycachemanager's saveresolver() method

the problem, discovered, custom jboss resolver needed name. changed part of repositories block read:

def jbossresolver = new org.apache.ivy.plugins.resolver.urlresolver() jbossresolver.addartifactpattern("https://repository.jboss.org/nexus/content/groups/public-jboss/com/sun/media/[module]/[revision]/[artifact]-[revision].[ext]") jbossresolver.addartifactpattern("https://repository.jboss.org/nexus/content/groups/public-jboss/javax/media/[module]/[revision]/[artifact]-[revision].[ext]") jbossresolver.setname("awesomestjbossresolverever") resolver jbossresolver

adding name setname method took rid of nullpointer exception.

notably, more careful reading of grails documentation have grails documentation section on custom resolvers have hinted @ problem, custom urlresolver specifies name , settings property. lfmf


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