java - Unable to call Hibernate/QueryDSL from another maven subproject -

i have 2 maven sub-projects - jetty_runner1 , jetty_runner2

my directory structure looks following:

./jetty_runner1/pom.xml ./jetty_runner1/src/main/java/com/jetty_runner1/checkpersistence.java ./jetty_runner1/src/main/java/com/jetty_runner1/helloworldservlet.java ./jetty_runner1/src/main/java/com/jetty_runner1/misckeyvalue.java ./jetty_runner1/src/main/java/com/jetty_runner1/misckeyvaluemanager.java ./jetty_runner1/src/main/resources/meta-inf/persistence.xml ./jetty_runner1/src/main/webapp/web-inf/web.xml   ./jetty_runner2/pom.xml ./jetty_runner2/src/main/java/com/jetty_runner2/checkpersistence.java ./jetty_runner2/src/main/java/com/jetty_runner2/helloworldservlet.java ./jetty_runner2/src/main/resources/meta-inf/persistence.xml ./jetty_runner2/src/main/webapp/web-inf/web.xml   ./pom.xml 

checkpersistence.java, helloworldservlet.java, persistence.xml , web.xml same in 2 projects, except package names (i have created simplified example posting here. in actual application, 2 sub-projects wildly different things)

here actual file contents:

checkpersistence.java

public class checkpersistence {     public void beginupdation()     {         string val = null;         list<misckeyvalue> keyvalues = misckeyvaluemanager.get().selectstar();         if (keyvalues != null && keyvalues.size() == 1)             val = keyvalues.get(0).getstringvalue();         if (val == null)             val = "hello world";          misckeyvalue keyvalue = new misckeyvalue();         keyvalue.setstringkey("modifieddate");         keyvalue.setstringvalue(val);         misckeyvaluemanager.get().put(keyvalue);     } } 

helloworldservlet.java

public class helloworldservlet extends httpservlet {     @override     protected void doget(httpservletrequest request, httpservletresponse response)     {         new checkpersistence().beginupdation();     } } 

misckeyvalue.java

import javax.persistence.column; import javax.persistence.entity; import javax.persistence.id;  @entity (name="misc_key_value") public class misckeyvalue {     @id     @column(name="misc_key_value_id")     private string id;      @column(name="string_key")     private string stringkey;      @column(name="string_value")     private string stringvalue;      public string getid()     {         return id;     }     public void setid(string id)     {         this.id = id;     }     public string getstringkey()     {         return stringkey;     }     public void setstringkey(string stringkey)     {         this.stringkey = stringkey;     }     public string getstringvalue()     {         return stringvalue;     }     public void setstringvalue(string stringvalue)     {         this.stringvalue = stringvalue;     } } 

misckeyvaluemanager.java

import java.util.list; import java.util.uuid; import javax.persistence.entitymanager; import javax.persistence.entitymanagerfactory; import javax.persistence.entitytransaction; import javax.persistence.persistence; import com.mysema.query.jpa.impl.jpaquery;  public class misckeyvaluemanager {     private static misckeyvaluemanager instance = new misckeyvaluemanager();     protected entitymanagerfactory emf;     public static qmisckeyvalue qmisckeyvalue = qmisckeyvalue.misckeyvalue;      private misckeyvaluemanager()     {         this.emf = persistence.createentitymanagerfactory("world");     }      public static misckeyvaluemanager get()     {         return instance;     }      public list<misckeyvalue> selectstar()     {         entitymanager em = emf.createentitymanager();         entitytransaction tx = em.gettransaction();         tx.begin();         jpaquery query = new jpaquery(em);         list<misckeyvalue> results = query.from(qmisckeyvalue)                 .fetchall().list(qmisckeyvalue);         tx.commit();         em.close();         return results;     }      public misckeyvalue put(misckeyvalue e)     {         entitymanager em = emf.createentitymanager();         entitytransaction tx = em.gettransaction();         tx.begin();         if (e.getid() == null)         {             e.setid(uuid.randomuuid().tostring());         }         misckeyvalue mergede = em.merge(e);         em.flush();         tx.commit();         em.clear();         em.close();         return mergede;     } } 

persistence.xml

<persistence xmlns="http://java.sun.com/xml/ns/persistence"         xmlns:xsi="http://www.w3.org/2001/xmlschema-instance"         xsi:schemalocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd"         version="2.0">     <persistence-unit name="world">       <provider>org.hibernate.jpa.hibernatepersistenceprovider</provider>       <properties>         <property name="hibernate.dialect" value="org.hibernate.dialect.mysqldialect" />         <property name="javax.persistence.jdbc.url" value="jdbc:mysql://localhost:3306/world"/>         <property name="javax.persistence.jdbc.user" value="root"/>         <property name="javax.persistence.jdbc.password" value="password"/>         <property name="hibernate.format_sql" value="true"/>       </properties>     </persistence-unit> </persistence> 

web.xml

<?xml version="1.0" encoding="iso-8859-1"?> <web-app     xmlns="http://java.sun.com/xml/ns/javaee"     xmlns:xsi="http://www.w3.org/2001/xmlschema-instance"    xsi:schemalocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"     version="2.5"    metadata-complete="true">   <servlet>     <servlet-name>hello</servlet-name>     <servlet-class>com.jetty_runner1.helloworldservlet</servlet-class>   </servlet>   <servlet-mapping>     <servlet-name>hello</servlet-name>     <url-pattern>/hello/*</url-pattern>   </servlet-mapping> </web-app> 

each pom.xml contains querydsl , jetty plugin too:

<build>   <plugins>    <plugin>       <groupid>org.eclipse.jetty</groupid>       <artifactid>jetty-maven-plugin</artifactid>       <version>${jettyversion}</version>     </plugin>     <plugin>       <groupid>com.mysema.maven</groupid>       <artifactid>apt-maven-plugin</artifactid>       <version>1.1.3</version>       <executions>         <execution>           <goals>             <goal>process</goal>           </goals>           <configuration>             <outputdirectory>target/generated-sources/java</outputdirectory>             <processor>com.mysema.query.apt.jpa.jpaannotationprocessor</processor>           </configuration>         </execution>       </executions>       <dependencies>         <dependency>           <groupid>com.mysema.querydsl</groupid>           <artifactid>querydsl-apt</artifactid>           <version>${querydsl.version}</version>         </dependency>       </dependencies>     </plugin>   </plugins> </build> 

when run mvn jetty:run jetty_runner1 , hit url localhost:8080/hello/ , works fine, in sense query executes , updates.

when run same jetty_runner2 , hit same url, gives exception saying:

org.hibernate.hql.internal.ast.querysyntaxexception: misc_key_value not mapped [select misckeyvalue misc_key_value misckeyvalue fetch properties]

at org.hibernate.hql.internal.ast.querysyntaxexception.generatequeryexception(querysyntaxexception.java:79) @ org.hibernate.queryexception.wrapwithquerystring(queryexception.java:103) @ org.hibernate.hql.internal.ast.querytranslatorimpl.docompile(querytranslatorimpl.java:218) @ org.hibernate.hql.internal.ast.querytranslatorimpl.compile(querytranslatorimpl.java:142) @ org.hibernate.engine.query.spi.hqlqueryplan.<init>(hqlqueryplan.java:115) @ org.hibernate.engine.query.spi.hqlqueryplan.<init>(hqlqueryplan.java:76) @ org.hibernate.engine.query.spi.queryplancache.gethqlqueryplan(queryplancache.java:150) @ org.hibernate.internal.abstractsessionimpl.gethqlqueryplan(abstractsessionimpl.java:298) @ org.hibernate.internal.abstractsessionimpl.createquery(abstractsessionimpl.java:236) @ org.hibernate.internal.sessionimpl.createquery(sessionimpl.java:1821) @ org.hibernate.jpa.spi.abstractentitymanagerimpl.createquery(abstractentitymanagerimpl.java:291) @ com.mysema.query.jpa.impl.abstractjpaquery.createquery(abstractjpaquery.java:129) @ com.mysema.query.jpa.impl.abstractjpaquery.createquery(abstractjpaquery.java:96) @ com.mysema.query.jpa.impl.abstractjpaquery.list(abstractjpaquery.java:248) @ com.jetty_runner1.misckeyvaluemanager.selectstar(misckeyvaluemanager.java:35) @ com.jetty_runner2.checkpersistence.beginupdation(checkpersistence.java:13) @ com.jetty_runner2.helloworldservlet.doget(helloworldservlet.java:16) 

so after more searching, found 2 solutions:

1) add your-entity-class persistence.xml

2) use org.hibernate.integrator.spi.integrator service it's usage not documented hibernate 5

so #1 works 1 irritant: need manually put entity classes in persistence.xml