JPA не работает должным образом, хотя это выглядит как простой вызов JPQL:
SELECT e FROM Employee e
... но, получаяэто исключение (из системного журнала после операции GET) ...
Обратите внимание на предупреждение EL: "Классы моделей, возможно, не были найдены во время поиска сущностей" ...
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[EL Info]: 2018-09-19 12:21:37.142--ServerSession(301360221)--Thread(Thread[http-nio-8080-exec-1,5,main])--/file:/usr/local/apache-tomee-plume-7.0.5/webapps/MyRestSvc/WEB-INF/classes/_DB2JPA login successful
[EL Warning]: 2018-09-19 12:21:37.144--ServerSession(301360221)--Thread(Thread[http-nio-8080-exec-1,5,main])--Problem while registering MBean: java.lang.NullPointerException
[EL Warning]: 2018-09-19 12:21:37.156--Thread(Thread[http-nio-8080-exec-1,5,main])--The collection of metamodel types is empty. Model classes may not have been found during entity search for Java SE and some Java EE container managed persistence units. Please verify that your entity classes are referenced in persistence.xml using either <class> elements or a global <exclude-unlisted-classes>false</exclude-unlisted-classes> element
java.lang.IllegalArgumentException: An exception occurred while creating a query in EntityManager:
Exception Description: Problem compiling [SELECT e FROM Employee e].
[14, 22] The abstract schema type 'Employee' is unknown.
at org.eclipse.persistence.internal.jpa.EntityManagerImpl.createQuery(EntityManagerImpl.java:1743)
at org.eclipse.persistence.internal.jpa.EntityManagerImpl.createQuery(EntityManagerImpl.java:1764)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:564)
at org.apache.openejb.persistence.JtaEntityManager.createQuery(JtaEntityManager.java:387)
at org.apache.openejb.persistence.JtaEntityManager.typedProxyIfNoTx(JtaEntityManager.java:382)
at org.apache.openejb.persistence.JtaEntityManager.createQuery(JtaEntityManager.java:454)
at aaa.bbb.ccc.war.MyRestSvc.get(MyRestSvc.java:42)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
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Буду признателен за любые идеи / предложения, которые помогут решить эту проблему.Интересно, есть ли некоторая несовместимость с EclipseLink версии 2.7.1 и как классы моделей генерируются с помощью Eclipse (photon) ide.
Я использую базу данных db2sampl, которая поставляется в комплекте сdb2express-c ...
Вот файл tomee.xml, объявляющий ресурс ...
<?xml version="1.0" encoding="UTF-8"?>
<tomee>
<Resource id="jdbc/sample" type="javax.sql.DataSource">
driverClassName com.ibm.db2.jcc.DB2Driver
jdbcDriverType 4
url jdbc:db2://localhost:50000/SAMPLE
username db2inst1
password db2inst1-pwd
</Resource>
</tomee>
Вот файл persistence.xml ...
<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.1"
xmlns="http://xmlns.jcp.org/xml/ns/persistence"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence http://xmlns.jcp.org/xml/ns/persistence/persistence_2_1.xsd">
<persistence-unit name="DB2JPA">
<jta-data-source>jdbc/SAMPLE</jta-data-source>
<class>aaa.bbb.ccc.model.Department</class>
<class>aaa.bbb.ccc.model.Employee</class>
<class>aaa.bbb.ccc.model.Staff</class>
<exclude-unlisted-classes>false</exclude-unlisted-classes>
<properties>
<property name="eclipselink.logging.level" value="FINE" />
</properties>
</persistence-unit>
</persistence>
Вот классы моделей (созданные с использованием Eclipse: объекты, сгенерированные из таблиц) ...
Employee.java ...
package aaa.bbb.ccc.model;
import java.io.Serializable;
import javax.persistence.*;
import java.math.BigDecimal;
import java.util.Date;
import java.util.List;
/**
* The persistent class for the EMPLOYEE database table.
*
*/
@Entity
@Table(name="EMPLOYEE")
@NamedQuery(name="Employee.findAll", query="SELECT e FROM Employee e")
public class Employee implements Serializable {
private static final long serialVersionUID = 1L;
@Id
@Column(unique=true, nullable=false, length=6)
private String empno;
@Temporal(TemporalType.DATE)
private Date birthdate;
@Column(precision=9, scale=2)
private BigDecimal bonus;
@Column(name="\"COMM\"", precision=9, scale=2)
private BigDecimal comm;
@Column(nullable=false)
private short edlevel;
@Column(nullable=false, length=12)
private String firstnme;
@Temporal(TemporalType.DATE)
private Date hiredate;
@Column(length=8)
private String job;
@Column(nullable=false, length=15)
private String lastname;
@Column(length=1)
private String midinit;
@Column(length=4)
private String phoneno;
@Column(precision=9, scale=2)
private BigDecimal salary;
@Column(length=1)
private String sex;
//bi-directional many-to-one association to Department
@OneToMany(mappedBy="employee")
private List<Department> departments;
//bi-directional many-to-one association to Department
@ManyToOne
@JoinColumn(name="WORKDEPT")
private Department department;
public Employee() {
}
public String getEmpno() {
return this.empno;
}
public void setEmpno(String empno) {
this.empno = empno;
}
public Date getBirthdate() {
return this.birthdate;
}
public void setBirthdate(Date birthdate) {
this.birthdate = birthdate;
}
public BigDecimal getBonus() {
return this.bonus;
}
public void setBonus(BigDecimal bonus) {
this.bonus = bonus;
}
public BigDecimal getComm() {
return this.comm;
}
public void setComm(BigDecimal comm) {
this.comm = comm;
}
public short getEdlevel() {
return this.edlevel;
}
public void setEdlevel(short edlevel) {
this.edlevel = edlevel;
}
public String getFirstnme() {
return this.firstnme;
}
public void setFirstnme(String firstnme) {
this.firstnme = firstnme;
}
public Date getHiredate() {
return this.hiredate;
}
public void setHiredate(Date hiredate) {
this.hiredate = hiredate;
}
public String getJob() {
return this.job;
}
public void setJob(String job) {
this.job = job;
}
public String getLastname() {
return this.lastname;
}
public void setLastname(String lastname) {
this.lastname = lastname;
}
public String getMidinit() {
return this.midinit;
}
public void setMidinit(String midinit) {
this.midinit = midinit;
}
public String getPhoneno() {
return this.phoneno;
}
public void setPhoneno(String phoneno) {
this.phoneno = phoneno;
}
public BigDecimal getSalary() {
return this.salary;
}
public void setSalary(BigDecimal salary) {
this.salary = salary;
}
public String getSex() {
return this.sex;
}
public void setSex(String sex) {
this.sex = sex;
}
public List<Department> getDepartments() {
return this.departments;
}
public void setDepartments(List<Department> departments) {
this.departments = departments;
}
public Department addDepartment(Department department) {
getDepartments().add(department);
department.setEmployee(this);
return department;
}
public Department removeDepartment(Department department) {
getDepartments().remove(department);
department.setEmployee(null);
return department;
}
public Department getDepartment() {
return this.department;
}
public void setDepartment(Department department) {
this.department = department;
}
}
Department.java ...
(removed for space - can provide on request)
Staff.java ...
(removed for space - can provide on request)
Это служба REST - просто метод GET (для простоты)...
package aaa.bbb.ccc.war;
import java.util.List;
import javax.ejb.Stateless;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.core.Context;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.UriInfo;
import aaa.bbb.ccc.model.Employee;
@Stateless
@Path("/employeeList")
public class MyRestSvc {
@PersistenceContext(unitName = "DB2JPA")
EntityManager em;
@Context
UriInfo uriInfo;
public MyRestSvc() {
}
@GET
@Produces({ MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML })
public List<Employee> get(@Context javax.servlet.http.HttpServletRequest request) {
em.getEntityManagerFactory().getCache().evictAll(); // Invalidate all objects in the cache
List<Employee> eList = null;
try {
eList = em.createQuery("SELECT e FROM Employee e").getResultList();
} catch (Exception e) {
e.printStackTrace();
throw e;
}
return eList;
}
}
Вот лог при запуске Tomee ...
(removed for space - can provide on request)
Вот вывод системного журнала / реакция на операцию GET ...
[EL Info]: 2018-09-19 07:05:43.756--ServerSession(174651846)--Thread(Thread[http-nio-8080-exec-1,5,main])--EclipseLink, version: Eclipse Persistence Services - 2.7.1.v20171221-bd47e8f
[EL Fine]: 2018-09-19 07:05:43.765--Thread(Thread[http-nio-8080-exec-1,5,main])--Detected database platform: org.eclipse.persistence.platform.database.DB2Platform
[EL Config]: 2018-09-19 07:05:43.777--ServerSession(174651846)--Connection(393909340)--Thread(Thread[http-nio-8080-exec-1,5,main])--connecting(DatabaseLogin(
platform=>DatabasePlatform
user name=> ""
connector=>JNDIConnector datasource name=>null
))
[EL Config]: 2018-09-19 07:05:43.778--ServerSession(174651846)--Connection(935474207)--Thread(Thread[http-nio-8080-exec-1,5,main])--Connected: jdbc:db2://localhost:50000/SAMPLE
User: db2inst1
Database: DB2/LINUXX8664 Version: SQL10055
Driver: IBM Data Server Driver for JDBC and SQLJ Version: 4.21.29
[EL Config]: 2018-09-19 07:05:43.778--ServerSession(174651846)--Connection(247275895)--Thread(Thread[http-nio-8080-exec-1,5,main])--connecting(DatabaseLogin(
platform=>DB2Platform
user name=> ""
connector=>JNDIConnector datasource name=>null
))
[EL Config]: 2018-09-19 07:05:43.791--ServerSession(174651846)--Connection(1852461265)--Thread(Thread[http-nio-8080-exec-1,5,main])--Connected: jdbc:db2://localhost:50000/SAMPLE
User: db2inst1
Database: DB2/LINUXX8664 Version: SQL10055
Driver: IBM Data Server Driver for JDBC and SQLJ Version: 4.21.29
[EL Info]: 2018-09-19 07:05:43.796--ServerSession(174651846)--Thread(Thread[http-nio-8080-exec-1,5,main])--/file:/usr/local/apache-tomee-plume-7.0.5/webapps/MyRestSvc/WEB-INF/classes/_DB2JPA login successful
[EL Warning]: 2018-09-19 07:05:43.799--ServerSession(174651846)--Thread(Thread[http-nio-8080-exec-1,5,main])--Problem while registering MBean: java.lang.NullPointerException
[EL Warning]: 2018-09-19 07:05:43.806--Thread(Thread[http-nio-8080-exec-1,5,main])--The collection of metamodel types is empty. Model classes may not have been found during entity search for Java SE and some Java EE container managed persistence units. Please verify that your entity classes are referenced in persistence.xml using either <class> elements or a global <exclude-unlisted-classes>false</exclude-unlisted-classes> element
java.lang.IllegalArgumentException: An exception occurred while creating a query in EntityManager:
Exception Description: Problem compiling [SELECT e FROM Employee e].
[14, 22] The abstract schema type 'Employee' is unknown.
at org.eclipse.persistence.internal.jpa.EntityManagerImpl.createQuery(EntityManagerImpl.java:1743)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:564)
at org.apache.openejb.persistence.JtaEntityManager.createQuery(JtaEntityManager.java:387)
at org.apache.openejb.persistence.JtaEntityManager.proxyIfNoTx(JtaEntityManager.java:375)
at org.apache.openejb.persistence.JtaEntityManager.createQuery(JtaEntityManager.java:329)
at aaa.bbb.ccc.war.MyRestSvc.get(MyRestSvc.java:40)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:564)
at org.apache.openejb.core.interceptor.ReflectionInvocationContext$Invocation.invoke(ReflectionInvocationContext.java:205)
at org.apache.openejb.core.interceptor.ReflectionInvocationContext.proceed(ReflectionInvocationContext.java:186)
at org.apache.openejb.monitoring.StatsInterceptor.record(StatsInterceptor.java:191)
at org.apache.openejb.monitoring.StatsInterceptor.invoke(StatsInterceptor.java:102)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:564)
at org.apache.openejb.core.interceptor.ReflectionInvocationContext$Invocation.invoke(ReflectionInvocationContext.java:205)
at org.apache.openejb.core.interceptor.ReflectionInvocationContext.proceed(ReflectionInvocationContext.java:186)
at org.apache.openejb.core.interceptor.InterceptorStack.invoke(InterceptorStack.java:85)
at org.apache.openejb.core.stateless.StatelessContainer._invoke(StatelessContainer.java:252)
at org.apache.openejb.core.stateless.StatelessContainer.invoke(StatelessContainer.java:212)
at org.apache.openejb.util.proxy.ProxyEJB$Handler.invoke(ProxyEJB.java:74)
at aaa.bbb.ccc.war.MyRestSvc$$LocalBeanProxy.get(aaa/bbb/ccc/war/MyRestSvc.java)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:564)
at org.apache.openejb.server.cxf.rs.OpenEJBEJBInvoker.performInvocation(OpenEJBEJBInvoker.java:95)
at org.apache.cxf.service.invoker.AbstractInvoker.invoke(AbstractInvoker.java:96)
at org.apache.cxf.jaxrs.JAXRSInvoker.invoke(JAXRSInvoker.java:191)
at org.apache.openejb.server.cxf.rs.OpenEJBEJBInvoker.invoke(OpenEJBEJBInvoker.java:68)
at org.apache.cxf.jaxrs.JAXRSInvoker.invoke(JAXRSInvoker.java:101)
at org.apache.openejb.server.cxf.rs.AutoJAXRSInvoker.invoke(AutoJAXRSInvoker.java:64)
at org.apache.cxf.interceptor.ServiceInvokerInterceptor$1.run(ServiceInvokerInterceptor.java:59)
at org.apache.cxf.interceptor.ServiceInvokerInterceptor.handleMessage(ServiceInvokerInterceptor.java:96)
at org.apache.cxf.phase.PhaseInterceptorChain.doIntercept(PhaseInterceptorChain.java:308)
at org.apache.cxf.transport.ChainInitiationObserver.onMessage(ChainInitiationObserver.java:121)
at org.apache.cxf.transport.http.AbstractHTTPDestination.invoke(AbstractHTTPDestination.java:267)
at org.apache.openejb.server.cxf.rs.CxfRsHttpListener.doInvoke(CxfRsHttpListener.java:253)
at org.apache.tomee.webservices.CXFJAXRSFilter.doFilter(CXFJAXRSFilter.java:94)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.openejb.server.httpd.EEFilter.doFilter(EEFilter.java:65)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
at org.apache.tomee.catalina.OpenEJBValve.invoke(OpenEJBValve.java:44)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:493)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81)
at org.apache.tomee.catalina.OpenEJBSecurityListener$RequestCapturer.invoke(OpenEJBSecurityListener.java:97)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:650)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:800)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:800)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1471)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1135)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.base/java.lang.Thread.run(Thread.java:844)
Caused by: Exception [EclipseLink-0] (Eclipse Persistence Services - 2.7.1.v20171221-bd47e8f): org.eclipse.persistence.exceptions.JPQLException
Exception Description: Problem compiling [SELECT e FROM Employee e].
[14, 22] The abstract schema type 'Employee' is unknown.
at org.eclipse.persistence.internal.jpa.jpql.HermesParser.buildException(HermesParser.java:155)
at org.eclipse.persistence.internal.jpa.jpql.HermesParser.validate(HermesParser.java:347)
at org.eclipse.persistence.internal.jpa.jpql.HermesParser.populateQueryImp(HermesParser.java:278)
at org.eclipse.persistence.internal.jpa.jpql.HermesParser.buildQuery(HermesParser.java:163)
at org.eclipse.persistence.internal.jpa.EJBQueryImpl.buildEJBQLDatabaseQuery(EJBQueryImpl.java:140)
at org.eclipse.persistence.internal.jpa.EJBQueryImpl.buildEJBQLDatabaseQuery(EJBQueryImpl.java:116)
at org.eclipse.persistence.internal.jpa.EJBQueryImpl.<init>(EJBQueryImpl.java:102)
at org.eclipse.persistence.internal.jpa.EJBQueryImpl.<init>(EJBQueryImpl.java:86)
at org.eclipse.persistence.internal.jpa.EntityManagerImpl.createQuery(EntityManagerImpl.java:1741)
... 71 more
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pom.xml ...
(removed for space - can provide on request)
Информация об окружающей среде ...
java 10
EclipseLink (2.7.1)
Dockerized Db2express-c
apache-tomee-7.0.5-plume