java - Unexpected exception while filling JasperReports report - Could not initialize net.sf.jasperreports.engine.util.JRStyledTextParser (GWT) -

i building website gwt , want incorporate report generator in site using jasperreports. data report draws store in database in cloud, use instance , cloud sql connect database , retrieve/store data (basically user table). user supposed login credentials , pressing button "download" should able generated report in pdf form. have implemented rpc process.

the problem when jasperfillmanager.fillreport method called fill report, following exception

    severe: javax.servlet.servletcontext log: exception while dispatching incoming rpc call com.google.gwt.user.server.rpc.unexpectedexception: service method 'public abstract java.lang.string com.myproject.website.client.reportservice.createreport(java.lang.string,java.lang.string)' threw unexpected exception: java.lang.noclassdeffounderror: java.awt.font restricted class. please see google  app engine developer's guide more details.     @ com.google.gwt.user.server.rpc.rpc.encoderesponseforfailure(rpc.java:389)     @ com.google.gwt.user.server.rpc.rpc.invokeandencoderesponse(rpc.java:579)     @ com.google.gwt.user.server.rpc.remoteserviceservlet.processcall(remoteserviceservlet.java:208)     @ com.google.gwt.user.server.rpc.remoteserviceservlet.processpost(remoteserviceservlet.java:248)     @ com.google.gwt.user.server.rpc.abstractremoteserviceservlet.dopost(abstractremoteserviceservlet.java:62)     @ javax.servlet.http.httpservlet.service(httpservlet.java:637)     @ javax.servlet.http.httpservlet.service(httpservlet.java:717)     @ org.mortbay.jetty.servlet.servletholder.handle(servletholder.java:511)     @ org.mortbay.jetty.servlet.servlethandler$cachedchain.dofilter(servlethandler.java:1166)     @ com.google.appengine.api.socket.dev.devsocketfilter.dofilter(devsocketfilter.java:74)     @ org.mortbay.jetty.servlet.servlethandler$cachedchain.dofilter(servlethandler.java:1157)     @ com.google.appengine.tools.development.responserewriterfilter.dofilter(responserewriterfilter.java:123)     @ org.mortbay.jetty.servlet.servlethandler$cachedchain.dofilter(servlethandler.java:1157)     @ com.google.appengine.tools.development.headerverificationfilter.dofilter(headerverificationfilter.java:34)     @ org.mortbay.jetty.servlet.servlethandler$cachedchain.dofilter(servlethandler.java:1157)     @ com.google.appengine.api.blobstore.dev.serveblobfilter.dofilter(serveblobfilter.java:61)     @ org.mortbay.jetty.servlet.servlethandler$cachedchain.dofilter(servlethandler.java:1157)     @ com.google.apphosting.utils.servlet.transactioncleanupfilter.dofilter(transactioncleanupfilter.java:43)     @ org.mortbay.jetty.servlet.servlethandler$cachedchain.dofilter(servlethandler.java:1157)     @ com.google.appengine.tools.development.staticfilefilter.dofilter(staticfilefilter.java:125)     @ org.mortbay.jetty.servlet.servlethandler$cachedchain.dofilter(servlethandler.java:1157)     @ com.google.appengine.tools.development.backendserversfilter.dofilter(backendserversfilter.java:97)     @ org.mortbay.jetty.servlet.servlethandler$cachedchain.dofilter(servlethandler.java:1157)     @ org.mortbay.jetty.servlet.servlethandler.handle(servlethandler.java:388)     @ org.mortbay.jetty.security.securityhandler.handle(securityhandler.java:216)     @ org.mortbay.jetty.servlet.sessionhandler.handle(sessionhandler.java:182)     @ org.mortbay.jetty.handler.contexthandler.handle(contexthandler.java:765)     @ org.mortbay.jetty.webapp.webappcontext.handle(webappcontext.java:418)     @ com.google.appengine.tools.development.devappenginewebappcontext.handle(devappenginewebappcontext.java:94)     @ org.mortbay.jetty.handler.handlerwrapper.handle(handlerwrapper.java:152)     @ com.google.appengine.tools.development.jettycontainerservice$apiproxyhandler.handle(jettycontainerservice.java:383)     @ org.mortbay.jetty.handler.handlerwrapper.handle(handlerwrapper.java:152)     @ org.mortbay.jetty.server.handle(server.java:326)     @ org.mortbay.jetty.httpconnection.handlerequest(httpconnection.java:542)     @ org.mortbay.jetty.httpconnection$requesthandler.content(httpconnection.java:938)     @ org.mortbay.jetty.httpparser.parsenext(httpparser.java:755)     @ org.mortbay.jetty.httpparser.parseavailable(httpparser.java:218)     @ org.mortbay.jetty.httpconnection.handle(httpconnection.java:404)     @ org.mortbay.io.nio.selectchannelendpoint.run(selectchannelendpoint.java:409)     @ org.mortbay.thread.queuedthreadpool$poolthread.run(queuedthreadpool.java:582) caused by: java.lang.noclassdeffounderror: java.awt.font restricted class. please see google  app engine developer's guide more details.     @ com.google.appengine.tools.development.agent.runtime.runtime.reject(runtime.java:51)     @ net.sf.jasperreports.engine.fonts.simplefontface.<init>(simplefontface.java:100)     @ net.sf.jasperreports.engine.fonts.simplefontface.<init>(simplefontface.java:128)     @ net.sf.jasperreports.engine.fonts.simplefontface.getinstance(simplefontface.java:67)     @ net.sf.jasperreports.engine.fonts.simplefontfamily.setnormal(simplefontfamily.java:99)     @ net.sf.jasperreports.engine.fonts.simplefontextensionhelper.parsefontfamily(simplefontextensionhelper.java:261)     @ net.sf.jasperreports.engine.fonts.simplefontextensionhelper.parsefontfamilies(simplefontextensionhelper.java:232)     @ net.sf.jasperreports.engine.fonts.simplefontextensionhelper.loadfontfamilies(simplefontextensionhelper.java:193)     @ net.sf.jasperreports.engine.fonts.simplefontextensionhelper.loadfontfamilies(simplefontextensionhelper.java:162)     @ net.sf.jasperreports.engine.fonts.fontextensionsregistry.getextensions(fontextensionsregistry.java:56)     @ net.sf.jasperreports.extensions.defaultextensionsregistry.getextensions(defaultextensionsregistry.java:110)     @ net.sf.jasperreports.engine.util.jrstyledtextparser.<clinit>(jrstyledtextparser.java:83)     @ java.lang.class.forname0(native method)     @ java.lang.class.forname(unknown source)     @ com.google.appengine.tools.development.agent.runtime.runtimehelper.checkrestricted(runtimehelper.java:70)     @ com.google.appengine.tools.development.agent.runtime.runtime.checkrestricted(runtime.java:64)     @ net.sf.jasperreports.engine.fill.jrbasefiller.<init>(jrbasefiller.java:121)     @ net.sf.jasperreports.engine.fill.jrverticalfiller.<init>(jrverticalfiller.java:88)     @ net.sf.jasperreports.engine.fill.jrverticalfiller.<init>(jrverticalfiller.java:103)     @ net.sf.jasperreports.engine.fill.jrverticalfiller.<init>(jrverticalfiller.java:61)     @ net.sf.jasperreports.engine.fill.jrfiller.createfiller(jrfiller.java:153)     @ net.sf.jasperreports.engine.fill.jrfiller.fill(jrfiller.java:55)     @ net.sf.jasperreports.engine.jasperfillmanager.fill(jasperfillmanager.java:446)     @ net.sf.jasperreports.engine.jasperfillmanager.fill(jasperfillmanager.java:276)     @ net.sf.jasperreports.engine.jasperfillmanager.fillreport(jasperfillmanager.java:745)     @ com.myproject.website.server.reportserviceimpl.createreport(reportserviceimpl.java:65)     @ sun.reflect.nativemethodaccessorimpl.invoke0(native method)     @ sun.reflect.nativemethodaccessorimpl.invoke(unknown source)     @ sun.reflect.delegatingmethodaccessorimpl.invoke(unknown source)     @ java.lang.reflect.method.invoke(unknown source)     @ com.google.appengine.tools.development.agent.runtime.runtime.invoke(runtime.java:115)     @ com.google.gwt.user.server.rpc.rpc.invokeandencoderesponse(rpc.java:561)     ... 38 more  not generate report 

if press download button again (without having changed anything) different exception

severe: javax.servlet.servletcontext log: exception while dispatching incoming rpc call com.google.gwt.user.server.rpc.unexpectedexception: service method 'public abstract java.lang.string com.myproject.website.client.reportservice.createreport(java.lang.string,java.lang.string)' threw unexpected exception: java.lang.noclassdeffounderror: not initialize class net.sf.jasperreports.engine.util.jrstyledtextparser     @ com.google.gwt.user.server.rpc.rpc.encoderesponseforfailure(rpc.java:389)     @ com.google.gwt.user.server.rpc.rpc.invokeandencoderesponse(rpc.java:579)     @ com.google.gwt.user.server.rpc.remoteserviceservlet.processcall(remoteserviceservlet.java:208)     @ com.google.gwt.user.server.rpc.remoteserviceservlet.processpost(remoteserviceservlet.java:248)     @ com.google.gwt.user.server.rpc.abstractremoteserviceservlet.dopost(abstractremoteserviceservlet.java:62)     @ javax.servlet.http.httpservlet.service(httpservlet.java:637)     @ javax.servlet.http.httpservlet.service(httpservlet.java:717)     @ org.mortbay.jetty.servlet.servletholder.handle(servletholder.java:511)     @ org.mortbay.jetty.servlet.servlethandler$cachedchain.dofilter(servlethandler.java:1166)     @ com.google.appengine.api.socket.dev.devsocketfilter.dofilter(devsocketfilter.java:74)     @ org.mortbay.jetty.servlet.servlethandler$cachedchain.dofilter(servlethandler.java:1157)     @ com.google.appengine.tools.development.responserewriterfilter.dofilter(responserewriterfilter.java:123)     @ org.mortbay.jetty.servlet.servlethandler$cachedchain.dofilter(servlethandler.java:1157)     @ com.google.appengine.tools.development.headerverificationfilter.dofilter(headerverificationfilter.java:34)     @ org.mortbay.jetty.servlet.servlethandler$cachedchain.dofilter(servlethandler.java:1157)     @ com.google.appengine.api.blobstore.dev.serveblobfilter.dofilter(serveblobfilter.java:61)     @ org.mortbay.jetty.servlet.servlethandler$cachedchain.dofilter(servlethandler.java:1157)     @ com.google.apphosting.utils.servlet.transactioncleanupfilter.dofilter(transactioncleanupfilter.java:43)     @ org.mortbay.jetty.servlet.servlethandler$cachedchain.dofilter(servlethandler.java:1157)     @ com.google.appengine.tools.development.staticfilefilter.dofilter(staticfilefilter.java:125)     @ org.mortbay.jetty.servlet.servlethandler$cachedchain.dofilter(servlethandler.java:1157)     @ com.google.appengine.tools.development.backendserversfilter.dofilter(backendserversfilter.java:97)     @ org.mortbay.jetty.servlet.servlethandler$cachedchain.dofilter(servlethandler.java:1157)     @ org.mortbay.jetty.servlet.servlethandler.handle(servlethandler.java:388)     @ org.mortbay.jetty.security.securityhandler.handle(securityhandler.java:216)     @ org.mortbay.jetty.servlet.sessionhandler.handle(sessionhandler.java:182)     @ org.mortbay.jetty.handler.contexthandler.handle(contexthandler.java:765)     @ org.mortbay.jetty.webapp.webappcontext.handle(webappcontext.java:418)     @ com.google.appengine.tools.development.devappenginewebappcontext.handle(devappenginewebappcontext.java:94)     @ org.mortbay.jetty.handler.handlerwrapper.handle(handlerwrapper.java:152)     @ com.google.appengine.tools.development.jettycontainerservice$apiproxyhandler.handle(jettycontainerservice.java:383)     @ org.mortbay.jetty.handler.handlerwrapper.handle(handlerwrapper.java:152)     @ org.mortbay.jetty.server.handle(server.java:326)     @ org.mortbay.jetty.httpconnection.handlerequest(httpconnection.java:542)     @ org.mortbay.jetty.httpconnection$requesthandler.content(httpconnection.java:938)     @ org.mortbay.jetty.httpparser.parsenext(httpparser.java:755)     @ org.mortbay.jetty.httpparser.parseavailable(httpparser.java:218)     @ org.mortbay.jetty.httpconnection.handle(httpconnection.java:404)     @ org.mortbay.io.nio.selectchannelendpoint.run(selectchannelendpoint.java:409)     @ org.mortbay.thread.queuedthreadpool$poolthread.run(queuedthreadpool.java:582) caused by: java.lang.noclassdeffounderror: not initialize class net.sf.jasperreports.engine.util.jrstyledtextparser     @ java.lang.class.forname0(native method)     @ java.lang.class.forname(unknown source)     @ com.google.appengine.tools.development.agent.runtime.runtimehelper.checkrestricted(runtimehelper.java:70)     @ com.google.appengine.tools.development.agent.runtime.runtime.checkrestricted(runtime.java:64)     @ net.sf.jasperreports.engine.fill.jrbasefiller.<init>(jrbasefiller.java:121)     @ net.sf.jasperreports.engine.fill.jrverticalfiller.<init>(jrverticalfiller.java:88)     @ net.sf.jasperreports.engine.fill.jrverticalfiller.<init>(jrverticalfiller.java:103)     @ net.sf.jasperreports.engine.fill.jrverticalfiller.<init>(jrverticalfiller.java:61)     @ net.sf.jasperreports.engine.fill.jrfiller.createfiller(jrfiller.java:153)     @ net.sf.jasperreports.engine.fill.jrfiller.fill(jrfiller.java:55)     @ net.sf.jasperreports.engine.jasperfillmanager.fill(jasperfillmanager.java:446)     @ net.sf.jasperreports.engine.jasperfillmanager.fill(jasperfillmanager.java:276)     @ net.sf.jasperreports.engine.jasperfillmanager.fillreport(jasperfillmanager.java:745)     @ com.myproject.website.server.reportserviceimpl.createreport(reportserviceimpl.java:65)     @ sun.reflect.nativemethodaccessorimpl.invoke0(native method)     @ sun.reflect.nativemethodaccessorimpl.invoke(unknown source)     @ sun.reflect.delegatingmethodaccessorimpl.invoke(unknown source)     @ java.lang.reflect.method.invoke(unknown source)     @ com.google.appengine.tools.development.agent.runtime.runtime.invoke(runtime.java:115)     @ com.google.gwt.user.server.rpc.rpc.invokeandencoderesponse(rpc.java:561)     ... 38 more  not generate report 

after looking while in internet read on might missing library issue added libraries jasperreports distribution classpath of project. files in classpath (from jr distribution) are:

1. commons-beanutils-1.8.0.jar
2. commons-collections-2.1.1.jar
3. commons-digester-2.1.jar
4. commons-javaflow-20060411.jar
5. commons-logging-1.1.1.jar
6. itext-2.1.7.js1.jar
7. jasperreports-5.0.0.jar
8. jasperreports-fonts-5.0.0.jar
9. jasperreports-javaflow-5.0.0.jar

yet, still same exception thrown...

any hint of should problem?

i post here code downloadreport function rpc methods

downloadreport method

void downloadreport(string username, string password){     // create report ,     reportservice.util.getinstance().createreport(username, password, new asynccallback<string>(){         @override         public void onsuccess(string result){ // url of created report file returned             text1.settext(result);         }          @override         public void onfailure(throwable caught){             system.out.println("could not generate report");         }     });  } 

reportservice.java

package com.myproject.website.client;  import com.google.gwt.core.client.gwt; import com.google.gwt.user.client.rpc.remoteservice; import com.google.gwt.user.client.rpc.remoteservicerelativepath;  @remoteservicerelativepath("reportservice") public interface reportservice extends remoteservice {      public static class util {          private static reportserviceasync instance;          public static reportserviceasync getinstance() {              if (instance == null) {                 instance = gwt.create(reportservice.class);             }             return instance;         }     }      string createreport(string name, string password);  } 

reportserviceimpl.java

package com.myproject.website.server;  import java.sql.connection; import java.sql.drivermanager; import java.sql.preparedstatement; import java.sql.resultset; import java.sql.sqlexception; import com.google.appengine.api.rdbms.appenginedriver; import com.google.gwt.user.server.rpc.remoteserviceservlet;  import com.myproject.website.client.reportservice;  import java.io.file; import java.io.ioexception; import java.io.printwriter; import java.util.hashmap; import java.util.map;  import net.sf.jasperreports.engine.jasperfillmanager;   import net.sf.jasperreports.engine.jrexception; import net.sf.jasperreports.engine.jrruntimeexception; import net.sf.jasperreports.engine.jasperexportmanager; import net.sf.jasperreports.engine.jasperfillmanager; import net.sf.jasperreports.engine.jasperprint; import net.sf.jasperreports.engine.util.*; import net.sf.jasperreports.j2ee.servlets.basehttpservlet;   @suppresswarnings("serial") public class reportserviceimpl extends remoteserviceservlet implements reportservice{      @override     public string createreport(string name, string password) {          string temp = null;         connection c = null;         map<string, object> rparamet = new hashmap<string, object>();          try {               drivermanager.registerdriver(new appenginedriver());               c = drivermanager.getconnection("jdbc:google:rdbms://myproject:dbutest/dbtest");               rparamet.put("email", name);               rparamet.put("password", password);               rparamet.put("reporttitle", "test report");               string sourcefile = this.getservletcontext().getrealpath("web-inf") + "/testreport.jasper";                try {                 jasperprint reportprint = jasperfillmanager.fillreport(sourcefile, rparamet, c);                 jasperexportmanager.exportreporttopdffile(reportprint, "reporttest");               } catch (jrexception e) {                 // todo auto-generated catch block                 e.printstacktrace();               }              } catch (sqlexception e) {                 e.printstacktrace();             } {                 if (c != null)                    try {                     c.close();                   } catch (sqlexception ignore) {                   }             }              // more code added here getting report url          return temp;     }    } 

thanks in advance!

from first stack trace: java.lang.noclassdeffounderror: java.awt.font restricted class. please see google app engine developer's guide more details.

that guide refers https://developers.google.com/appengine/docs/java/jrewhitelist

so:

• either want make reports in app that'll deployed appengine, , have find library, jasperreports doesn't work in environment
• or don't intend run on appengine , misconfigured project