NXQL 'Count' function returns java.lang.NullPointerException

I'm trying to count how much disk space the workspace is using, so I'm using NXQL rest api. This is my query:

http://localhost:8080/nuxeo/site/api/v1/search/lang/NXQL/execute?query=SELECT COUNT(file:content/length) FROM Document Where ecm:isTrashed = 0 AND ecm:parentId = 'e7b18f15-1cea-4854-83f5-15f8788cc083'

But, when I execute, it returns

{
"entity-type": "exception",
"status": 500,
"message": "java.lang.NullPointerException"
}

Here is the log:

 2020-06-25T13:35:19,072 ERROR [WebEngineExceptionMapper] java.lang.NullPointerException
 java.lang.NullPointerException: null
    at org.nuxeo.elasticsearch.provider.ElasticSearchNxqlPageProvider.getCurrentPage(ElasticSearchNxqlPageProvider.java:118) ~[nuxeo-elasticsearch-core-10.10.jar:?]
    at org.nuxeo.ecm.automation.core.util.PaginablePageProvider.<init>(PaginablePageProvider.java:43) ~[nuxeo-core-io-10.10.jar:?]
    at org.nuxeo.ecm.automation.jaxrs.io.documents.PaginableDocumentModelListImpl.<init>(PaginableDocumentModelListImpl.java:49) ~[nuxeo-core-io-10.10.jar:?]
    at org.nuxeo.ecm.restapi.server.jaxrs.search.QueryExecutor.queryByLang(QueryExecutor.java:340) ~[nuxeo-search-rest-api-10.10.jar:?]
    at org.nuxeo.ecm.restapi.server.jaxrs.search.QueryExecutor.queryByLang(QueryExecutor.java:301) ~[nuxeo-search-rest-api-10.10.jar:?]
    at org.nuxeo.ecm.restapi.server.jaxrs.search.QueryExecutor.queryByLang(QueryExecutor.java:284) ~[nuxeo-search-rest-api-10.10.jar:?]
    at org.nuxeo.ecm.restapi.server.jaxrs.search.SearchObject.doQueryByLang(SearchObject.java:95) ~[nuxeo-search-rest-api-10.10.jar:?]
    at sun.reflect.GeneratedMethodAccessor204.invoke(Unknown Source) ~[?:?]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_242]
    at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_242]
    at com.sun.jersey.spi.container.JavaMethodInvokerFactory$1.invoke(JavaMethodInvokerFactory.java:60) ~[jersey-server-1.19.4.jar:1.19.4]
    at com.sun.jersey.server.impl.model.method.dispatch.AbstractResourceMethodDispatchProvider$ObjectOutInvoker._dispatch(AbstractResourceMethodDispatchProvider.java:258) ~[jersey-server-1.19.4.jar:1.19.4]
    at com.sun.jersey.server.impl.model.method.dispatch.ResourceJavaMethodDispatcher.dispatch(ResourceJavaMethodDispatcher.java:75) ~[jersey-server-1.19.4.jar:1.19.4]
    at com.sun.jersey.server.impl.uri.rules.HttpMethodRule.accept(HttpMethodRule.java:302) ~[jersey-server-1.19.4.jar:1.19.4]
    at com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147) ~[jersey-server-1.19.4.jar:1.19.4]
    at com.sun.jersey.server.impl.uri.rules.SubLocatorRule.accept(SubLocatorRule.java:137) ~[jersey-server-1.19.4.jar:1.19.4]
    at com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147) ~[jersey-server-1.19.4.jar:1.19.4]
    at com.sun.jersey.server.impl.uri.rules.SubLocatorRule.accept(SubLocatorRule.java:137) ~[jersey-server-1.19.4.jar:1.19.4]
    at com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147) ~[jersey-server-1.19.4.jar:1.19.4]
    at com.sun.jersey.server.impl.uri.rules.ResourceClassRule.accept(ResourceClassRule.java:108) ~[jersey-server-1.19.4.jar:1.19.4]
    at com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147) ~[jersey-server-1.19.4.jar:1.19.4]
    at com.sun.jersey.server.impl.uri.rules.RootResourceClassesRule.accept(RootResourceClassesRule.java:84) ~[jersey-server-1.19.4.jar:1.19.4]
    at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1542) ~[jersey-server-1.19.4.jar:1.19.4]
    at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1473) [jersey-server-1.19.4.jar:1.19.4]
    at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1419) [jersey-server-1.19.4.jar:1.19.4]
    at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1409) [jersey-server-1.19.4.jar:1.19.4]
    at com.sun.jersey.spi.container.servlet.WebComponent.service(WebComponent.java:409) [jersey-servlet-1.19.4.jar:1.19.4]
    at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:558) [jersey-servlet-1.19.4.jar:1.19.4]
    at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:733) [jersey-servlet-1.19.4.jar:1.19.4]
    at org.nuxeo.ecm.webengine.app.jersey.WebEngineServlet.containerService(WebEngineServlet.java:72) [nuxeo-webengine-core-10.10.jar:?]
    at org.nuxeo.ecm.webengine.app.jersey.WebEngineServlet.service(WebEngineServlet.java:56) [nuxeo-webengine-core-10.10.jar:?]
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:741) [servlet-api.jar:?]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) [catalina.jar:9.0.14]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [catalina.jar:9.0.14]
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) [tomcat-websocket.jar:9.0.14]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [catalina.jar:9.0.14]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [catalina.jar:9.0.14]
    at org.nuxeo.elasticsearch.ElasticSearchFilter.doFilter(ElasticSearchFilter.java:55) [nuxeo-elasticsearch-core-10.10.jar:?]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [catalina.jar:9.0.14]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [catalina.jar:9.0.14]
    at org.nuxeo.ecm.webengine.jaxrs.session.SessionCleanupFilter.run(SessionCleanupFilter.java:50) [nuxeo-webengine-jaxrs-10.10.jar:?]
    at org.nuxeo.ecm.webengine.jaxrs.HttpFilter.doFilter(HttpFilter.java:49) [nuxeo-webengine-jaxrs-10.10.jar:?]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [catalina.jar:9.0.14]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [catalina.jar:9.0.14]
    at org.nuxeo.ecm.webengine.app.WebContextFilter.doFilter(WebContextFilter.java:56) [nuxeo-webengine-core-10.10.jar:?]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [catalina.jar:9.0.14]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [catalina.jar:9.0.14]
    at org.nuxeo.ecm.webengine.jaxrs.context.RequestContextFilter.run(RequestContextFilter.java:48) [nuxeo-webengine-jaxrs-10.10.jar:?]
    at org.nuxeo.ecm.webengine.jaxrs.HttpFilter.doFilter(HttpFilter.java:49) [nuxeo-webengine-jaxrs-10.10.jar:?]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [catalina.jar:9.0.14]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [catalina.jar:9.0.14]
    at org.nuxeo.ecm.webengine.app.HeaderFixFilter.run(HeaderFixFilter.java:62) [nuxeo-webengine-core-10.10.jar:?]
    at org.nuxeo.ecm.webengine.jaxrs.HttpFilter.doFilter(HttpFilter.java:49) [nuxeo-webengine-jaxrs-10.10.jar:?]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [catalina.jar:9.0.14]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [catalina.jar:9.0.14]
    at org.nuxeo.ecm.platform.web.common.requestcontroller.filter.NuxeoThreadTrackerFilter.doFilter(NuxeoThreadTrackerFilter.java:43) [nuxeo-platform-web-common-10.10.jar:?]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [catalina.jar:9.0.14]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [catalina.jar:9.0.14]
    at org.nuxeo.ecm.platform.web.common.requestcontroller.filter.NuxeoStandbyFilter.doFilter(NuxeoStandbyFilter.java:67) [nuxeo-platform-web-common-10.10.jar:?]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [catalina.jar:9.0.14]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [catalina.jar:9.0.14]
    at org.nuxeo.ecm.core.management.jtajca.internal.Log4jWebFilter.doFilter(Log4jWebFilter.java:69) [nuxeo-core-management-jtajca-10.10.jar:?]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [catalina.jar:9.0.14]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [catalina.jar:9.0.14]
    at org.nuxeo.ecm.platform.ui.web.rest.FancyURLFilter.doFilter(FancyURLFilter.java:120) [nuxeo-platform-ui-web-10.10.jar:?]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [catalina.jar:9.0.14]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [catalina.jar:9.0.14]
    at org.nuxeo.ecm.platform.web.common.requestcontroller.filter.NuxeoRequestControllerFilter.doFilter(NuxeoRequestControllerFilter.java:134) [nuxeo-platform-web-common-10.10.jar:?]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [catalina.jar:9.0.14]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [catalina.jar:9.0.14]
    at org.nuxeo.ecm.platform.ui.web.auth.NuxeoAuthenticationFilter.doFilterInternal(NuxeoAuthenticationFilter.java:633) [nuxeo-platform-web-common-10.10.jar:?]
    at org.nuxeo.ecm.platform.ui.web.auth.NuxeoAuthenticationFilter.doFilter(NuxeoAuthenticationFilter.java:429) [nuxeo-platform-web-common-10.10.jar:?]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [catalina.jar:9.0.14]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [catalina.jar:9.0.14]
    at com.thetransactioncompany.cors.CORSFilter.doFilter(CORSFilter.java:209) [cors-filter-2.6.jar:2.6]
    at com.thetransactioncompany.cors.CORSFilter.doFilter(CORSFilter.java:244) [cors-filter-2.6.jar:2.6]
    at org.nuxeo.ecm.platform.web.common.requestcontroller.filter.NuxeoCorsCsrfFilter.doFilter(NuxeoCorsCsrfFilter.java:258) [nuxeo-platform-web-common-10.10.jar:?]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [catalina.jar:9.0.14]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [catalina.jar:9.0.14]
    at org.nuxeo.ecm.platform.web.common.exceptionhandling.NuxeoExceptionFilter.doFilter(NuxeoExceptionFilter.java:67) [nuxeo-platform-web-common-10.10.jar:?]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [catalina.jar:9.0.14]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [catalina.jar:9.0.14]
    at org.nuxeo.ecm.platform.web.common.encoding.NuxeoEncodingFilter.doFilter(NuxeoEncodingFilter.java:64) [nuxeo-platform-web-common-10.10.jar:?]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [catalina.jar:9.0.14]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [catalina.jar:9.0.14]
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199) [catalina.jar:9.0.14]
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) [catalina.jar:9.0.14]
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:490) [catalina.jar:9.0.14]
    at org.apache.catalina.valves.rewrite.RewriteValve.invoke(RewriteValve.java:276) [catalina.jar:9.0.14]
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139) [catalina.jar:9.0.14]
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) [catalina.jar:9.0.14]
    at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:668) [catalina.jar:9.0.14]
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74) [catalina.jar:9.0.14]
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) [catalina.jar:9.0.14]
    at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408) [tomcat-coyote.jar:9.0.14]
    at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) [tomcat-coyote.jar:9.0.14]
    at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:834) [tomcat-coyote.jar:9.0.14]
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1417) [tomcat-coyote.jar:9.0.14]
    at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-coyote.jar:9.0.14]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [?:1.8.0_242]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [?:1.8.0_242]
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-util.jar:9.0.14]
    at java.lang.Thread.run(Thread.java:748) [?:1.8.0_242]

Is it possible to do Count in NXQL or I'm doing something wrong?

0 votes

3 answers

202 views

ANSWER



I solved the problem, I created a custom endpoint on nuxeo which do that

@WebObject(type = "my-url")
public class MyController extends DefaultObject{

    @GET
    @Path("workspace-size")
    public Object simpleQuery(@Context HttpServletRequest request, @QueryParam("uid") String uid, 
            @QueryParam("initialDate") String initialDate, @QueryParam("endDate") String endDate) {
         CoreSession session = SessionFactory.getSession(request);

         String query = "SELECT SUM(file:content/length), SUM(thumb:thumbnail/length) "
                + " FROM Document WHERE ecm:parentId = '" + uid + "'"
                + " AND dc:created BETWEEN DATE '" + initialDate + "'"
                + " AND DATE '" + endDate + "'";

         StringBuffer sb = new StringBuffer();
         sb.append("{\"fileStorageSize\":");

         Long fileStorageSize = null;

         try (IterableQueryResult res = session.queryAndFetch(query, "NXQL")) {

              for (Map<String, Serializable> r : res) {
                  Long fileLength = r.get("SUM(file:content/length)") != null ? (Long) r.get("SUM(file:content/length)") : 0L;
                  Long thumbnialLenght = r.get("SUM(thumb:thumbnail/length)") != null ? (Long) r.get("SUM(thumb:thumbnail/length)") : 0L;

                  fileStorageSize = fileLength + thumbnialLenght;

                  sb.append(fileStorageSize);
                  break;
             }
         }
         sb.append("}");
        return sb.toString();
    }

}
0 votes



0 votes



Hello,

as I can see in the stacktrace, you are using an ElasticSearch page provider (ElasticSearchNxqlPageProvider). ElasticSearch queries has some limitations. One of them:

When using query, queryAndFetch or queryAndAggregate the select clause is limited to scalar properties: There is no support of NXQL aggregate like: DISTINCT, COUNT, AVERAGE, MAX, MIN, or operators like: + - / *.

More info: https://doc.nuxeo.com/nxdoc/nxql/#elasticsearch-nxql-limitations

Regards.

0 votes