java - Cannot marshall type class without a custom marshaler or @DynamoDBDocument annotation -
error: com.amazonaws.services.dynamodbv2.datamodeling.dynamodbmappingexception: cannot marshall type class [ljava.lang.string; without custom marshaler or @dynamodbdocument annotation.
i want store data dynamodb java spring mvc rest. making post request calls method load data amazon dynamodb. here code. restcontroller:
@restcontroller public class questionresponsecontroller { @requestmapping(value="/loadquestiontabledata",method=requestmethod.post,produces={"application/json"}) public dynamodbmapper loadquestiontabledata() { return loadquestiontabledata.loadquestiontabledata(); } } this question.java (pojo question table in dynamodb): question.java
import java.util.arrays; import com.amazonaws.services.dynamodbv2.datamodeling.dynamodbattribute; import com.amazonaws.services.dynamodbv2.datamodeling.dynamodbhashkey; import com.amazonaws.services.dynamodbv2.datamodeling.dynamodbtable; @dynamodbtable(tablename = "question") public class question { private int q_id; private string text; private string[] options; private string contraint; @dynamodbhashkey(attributename = "options") public string[] getoptions() { return options; } public void setoptions(string[] options) { this.options = options; } @dynamodbhashkey(attributename = "q_id") public int getq_id() { return q_id; } public void setq_id(int q_id) { this.q_id = q_id; } @dynamodbattribute(attributename = "text") public string gettext() { return text; } public void settext(string text) { this.text = text; } @dynamodbattribute(attributename = "contraint") public string getcontraint() { return contraint; } public void setcontraint(string contraint) { this.contraint = contraint; } } //along overridden tostring(), equals(), hashcode(). here loadquestiontabledata.java actual loading of data takes place dynamodb. loadquestiontabledata.java
public class loadquestiontabledata { static dynamodbmapper mapper = null; public loadquestiontabledata() { //constructor } protected static logger logger = logger.getlogger("loadquestiontabledata"); public static dynamodbmapper loadquestiontabledata() { try { amazondynamodbclient client = new amazondynamodbclient(new profilecredentialsprovider()); dynamodbmapper mapper = new dynamodbmapper(client); question item = new question(); item.setq_id(1); item.settext(iquestionanswerdata.amquestiontext1); item.setoptions(iquestionanswerdata.amoptionsforqn1); item.setcontraint(iquestionanswerdata.constraintmorning); mapper.save(item); item = new question(); item.setq_id(2); item.settext(iquestionanswerdata.amquestiontext2); item.setoptions(iquestionanswerdata.amoptionsforqn2); item.setcontraint(iquestionanswerdata.constraintmorning); mapper.save(item); } catch(amazonserviceexception ase) { ase.printstacktrace(); ase.getmessage(); } catch (exception e) { e.printstacktrace(); e.getmessage(); } return mapper; } } i have loaded questions data interface constants. iquestionanswerdata.java
public interface iquestionanswerdata { static string constraintmorning= "08:00"; static string amquestiontext1 ="good"; static string amoption11="okay okay"; static string amoption12 = "better"; static string amoption13 = "nice"; static string amoption14= "awsome!"; static string [] amoptionsforqn1 = new string[]{amoption11,amoption12,amoption13,amoption14}; static string amquestiontext2 ="how health?"; string amoption21="i to!"; string amoption22 = "i'll in bit"; string amoption23 = "maybe later"; string amoption24= "i never!"; static string [] amoptionsforqn2 = new string[]{amoption21,amoption22,amoption23,amoption24}; } and getting error follows. stacktrace console.
19:03:37.345 [tomcat-http--6] debug o.s.w.s.m.m.a.requestmappinghandlermapping - returning handler method [public com.amazonaws.services.dynamodbv2.datamodeling.dynamodbmapper com.webapp.controller.questionresponsecontroller.loadquestiontabledata()] 19:03:37.345 [tomcat-http--6] debug o.s.b.f.s.defaultlistablebeanfactory - returning cached instance of singleton bean 'questionresponsecontroller' 19:03:37.399 [tomcat-http--6] debug com.amazonaws.amazonwebserviceclient - internal logging succesfully configured commons logger: true 19:03:37.418 [tomcat-http--6] debug com.amazonaws.metrics.awssdkmetrics - admin mbean registered under com.amazonaws.management:type=awssdkmetrics 19:03:37.581 [tomcat-http--6] debug c.a.internal.config.internalconfig - configuration override awssdk_config_override.json not found. //error starts here com.amazonaws.services.dynamodbv2.datamodeling.dynamodbmappingexception: cannot marshall type class [ljava.lang.string; without custom marshaler or @dynamodbdocument annotation. @ com.amazonaws.services.dynamodbv2.datamodeling.conversionschemas$standarditemconverter.getobjecttomapmarshaller(conversionschemas.java:396) @ com.amazonaws.services.dynamodbv2.datamodeling.conversionschemas$standarditemconverter.augment(conversionschemas.java:325) @ com.amazonaws.services.dynamodbv2.datamodeling.conversionschemas$standarditemconverter.getmarshaller(conversionschemas.java:299) @ com.amazonaws.services.dynamodbv2.datamodeling.conversionschemas$standarditemconverter.convert(conversionschemas.java:265) @ com.amazonaws.services.dynamodbv2.datamodeling.dynamodbmapper$saveobjecthandler.execute(dynamodbmapper.java:1044) @ com.amazonaws.services.dynamodbv2.datamodeling.dynamodbmapper.save(dynamodbmapper.java:948) @ com.amazonaws.services.dynamodbv2.datamodeling.dynamodbmapper.save(dynamodbmapper.java:740) @ com.webapp.service.loadquestiontabledata.loadquestiontabledata(loadquestiontabledata.java:33) @ com.webapp.controller.questionresponsecontroller.loadquestiontabledata(questionresponsecontroller.java:16) @ sun.reflect.nativemethodaccessorimpl.invoke0(native method) @ sun.reflect.nativemethodaccessorimpl.invoke(nativemethodaccessorimpl.java:62) @ sun.reflect.delegatingmethodaccessorimpl.invoke(delegatingmethodaccessorimpl.java:43) @ java.lang.reflect.method.invoke(method.java:497) @ org.springframework.web.method.support.invocablehandlermethod.doinvoke(invocablehandlermethod.java:221) @ org.springframework.web.method.support.invocablehandlermethod.invokeforrequest(invocablehandlermethod.java:137) @ org.springframework.web.servlet.mvc.method.annotation.servletinvocablehandlermethod.invokeandhandle(servletinvocablehandlermethod.java:110) @ org.springframework.web.servlet.mvc.method.annotation.requestmappinghandleradapter.invokehandlemethod(requestmappinghandleradapter.java:776) @ org.springframework.web.servlet.mvc.method.annotation.requestmappinghandleradapter.handleinternal(requestmappinghandleradapter.java:705) @ org.springframework.web.servlet.mvc.method.abstracthandlermethodadapter.handle(abstracthandlermethodadapter.java:85) @ org.springframework.web.servlet.dispatcherservlet.dodispatch(dispatcherservlet.java:959) @ org.springframework.web.servlet.dispatcherservlet.doservice(dispatcherservlet.java:893) @ org.springframework.web.servlet.frameworkservlet.processrequest(frameworkservlet.java:966) @ org.springframework.web.servlet.frameworkservlet.dopost(frameworkservlet.java:868) @ javax.servlet.http.httpservlet.service(httpservlet.java:644) @ org.springframework.web.servlet.frameworkservlet.service(frameworkservlet.java:842) @ javax.servlet.http.httpservlet.service(httpservlet.java:725) @ org.apache.catalina.core.applicationfilterchain.internaldofilter(applicationfilterchain.java:291) @ org.apache.catalina.core.applicationfilterchain.dofilter(applicationfilterchain.java:206) @ org.apache.tomcat.websocket.server.wsfilter.dofilter(wsfilter.java:52) @ org.apache.catalina.core.applicationfilterchain.internaldofilter(applicationfilterchain.java:239) @ org.apache.catalina.core.applicationfilterchain.dofilter(applicationfilterchain.java:206) @ org.apache.catalina.core.standardwrappervalve.invoke(standardwrappervalve.java:219) @ org.apache.catalina.core.standardcontextvalve.invoke(standardcontextvalve.java:106) @ org.apache.catalina.authenticator.authenticatorbase.invoke(authenticatorbase.java:501) @ org.apache.catalina.core.standardhostvalve.invoke(standardhostvalve.java:142) @ org.apache.catalina.valves.errorreportvalve.invoke(errorreportvalve.java:79) @ org.apache.catalina.valves.abstractaccesslogvalve.invoke(abstractaccesslogvalve.java:610) @ org.apache.catalina.core.standardenginevalve.invoke(standardenginevalve.java:88) @ org.apache.catalina.connector.coyoteadapter.service(coyoteadapter.java:516) @ org.apache.coyote.http11.abstracthttp11processor.process(abstracthttp11processor.java:1086) @ org.apache.coyote.abstractprotocol$abstractconnectionhandler.process(abstractprotocol.java:659) @ org.apache.coyote.http11.http11protocol$http11connectionhandler.process(http11protocol.java:147) @ org.apache.tomcat.util.net.jioendpoint$socketprocessor.run(jioendpoint.java:277) @ java.util.concurrent.threadpoolexecutor.runworker(threadpoolexecutor.java:1142) @ java.util.concurrent.threadpoolexecutor$worker.run(threadpoolexecutor.java:617) @ org.apache.tomcat.util.threads.taskthread$wrappingrunnable.run(taskthread.java:61) @ java.lang.thread.run(thread.java:745) 19:03:38.061 [tomcat-http--6] debug o.s.web.servlet.dispatcherservlet - null modelandview returned dispatcherservlet name 'dispatcher': assuming handleradapter completed request handling 19:03:38.061 [tomcat-http--6] debug o.s.web.servlet.dispatcherservlet - completed request 19:03:48.169 [finalizer] debug o.a.h.i.c.poolingclientconnectionmanager - connection manager shutting down 19:03:48.172 [finalizer] debug o.a.h.i.c.poolingclientconnectionmanager - connection manager shut down 19:03:48.180 [java-sdk-http-connection-reaper] debug c.a.http.idleconnectionreaper - reaper thread: java.lang.interruptedexception: sleep interrupted @ java.lang.thread.sleep(native method) ~[na:1.8.0_45] @ com.amazonaws.http.idleconnectionreaper.run(idleconnectionreaper.java:112) ~[aws-java-sdk-1.9.40.jar:na] 19:03:48.180 [java-sdk-http-connection-reaper] debug c.a.http.idleconnectionreaper - shutting down reaper thread. kindly me resolve error can load items dynamodb. tia.
the problem might here public string[] getoptions(). instead of string[] can use set or list.
look @ examples:
http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/javaarbitrarydatamappinghlapi.html
http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/javadeclarativetagslist.html
http://aws.amazon.com/articles/0802321832592496
they never use arrays.
Comments
Post a Comment