Getting "No Persistence provider for EntityManager named" when Maven build is run with Junit testcases

Question

When running the maven build with Junit getting "No Persistence provider for EntityManager named" error.Not able to identify what is missing in my code.

Main class:

public class ApprovalHistory {

    @PersistenceContext(unitName = "Approval_History")  
    private Logger logger = LoggerFactory.getLogger(ApprovalHistory.class);

    public EntityManagerFactory emfactory = null;

    final String JDBC_URL_H2DB = "jdbc:h2:file:./APApproval/ApprovalHistoryH2DB";
    final String JDBC_USERNAME_H2DB = "";
    final String JDBC_PASSWORD_H2DB = "";

    final String JDBC_DRIVER_SQL = "com.microsoft.sqlserver.jdbc.SQLServerDriver";
    final String JDBC_DRIVER_H2 = "org.h2.Driver";
    final String JDBC_DRIVER_HSQL = "org.hsqldb.jdbc.JDBCDriver";

    final String PERSISTANCE_UNIT_NAME = "Approval_History";

    final String SELECT_BO_TABLE = "SELECT bobj FROM BusinessObjectTable bobj where bobj.docId =:";
    final String SELECT_COMMENT_TABLE = "SELECT comment FROM CommentTable comment where comment.actionTable.id IN :";
    final String SELECT_REASON_TABLE = "SELECT reason FROM ReasonTable reason where reason.actionTable.id IN :";    

    public ApprovalHistory()
    {
        try {
            createEntityManagerFactory();
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }


    public void insertData(List<ApprovalHistoryModel> historyList){

        if(historyList != null && !historyList.isEmpty())
        {
            EntityManager entitymanager = null;

            try
            {           
                entitymanager = getEntityManager();
                entitymanager.getTransaction().begin(); 


                ApprovalHistoryModel firstItem = historyList.get(0);

                ActionTable a = new ActionTable(firstItem.actionType, firstItem.tenantId, firstItem.comment, firstItem.reason);

                for(ApprovalHistoryModel h : historyList) 
                {
                    a.getBusinessObjects().add(new BusinessObjectTable(h.userName, h.taskId, h.docId, h.objectIdentifier1, h.objectIdentifier2, h.objectIdentifier3,h.tenantId));
                }

                entitymanager.persist(a);

                entitymanager.getTransaction().commit();                    
            }
            catch (RuntimeException e) {
                if(entitymanager!=null && entitymanager.getTransaction().isActive()) {
                    entitymanager.getTransaction().rollback();
                }
                throw e;
            }

            finally{
                closeEntityManager(entitymanager);
            }
        }
    }


    public List<ApprovalHistoryModel> getApprovalHistory(String docID) throws Exception
    {
        logger.info("=ApprovalConnector=: start of getApprovalHistory()");

        List<ApprovalHistoryModel> historyModels = new ArrayList<ApprovalHistoryModel>();

        if(docID!=null && !docID.isEmpty()) {
        EntityManager entitymanager = null;

        try
        {
            entitymanager = getEntityManager();     

            TypedQuery<BusinessObjectTable> bobjquery =  entitymanager.createQuery(SELECT_BO_TABLE+"DocID ",BusinessObjectTable.class);
            bobjquery.setParameter("DocID", docID);         
            List<BusinessObjectTable> bobjs = bobjquery.getResultList();    

            if(bobjs!=null){
                for (BusinessObjectTable bobj : bobjs) {
                    ActionTable a = bobj.getActionTable();

                    ApprovalHistoryModel history = new ApprovalHistoryModel();
                    history.docId = bobj.getDocId();
                    history.taskId = bobj.getApprovalItemId();
                    history.userName = bobj.getUserName();

                    logger.debug("=ApprovalConnector=: getApprovalHistory(): documentID - "+bobj.getDocId());
                    history.actionType = a.getActionType();

                    logger.debug("=ApprovalConnector=: getApprovalHistory(): actionType - "+ history.actionType);

                    history.actionDate = ISODateTimeFormat.dateTime().print(new DateTime(a.getActionDate()));
                    history.objectIdentifier1 = bobj.getObjectIdentifier1();
                    history.objectIdentifier2=bobj.getObjectIdentifier2();
                    history.objectIdentifier3 = bobj.getObjectIdentifier3();
                    history.tenantId = a.getTenantId();

                    history.comment = a.getComment()!=null?a.getComment().getComment():"";
                    history.reason = a.getReason()!=null?a.getReason().getReason():"";

                    historyModels.add(history);
                }

            }
            logger.info("=ApprovalConnector=: end of getApprovalHistory()");
        }
        finally{
            closeEntityManager(entitymanager);
        }   
    }

        return historyModels;
    }

    public void createEntityManagerFactory() throws Exception
    {               
        Map<String, String> persistenceMap = new HashMap<String, String>();

        String jdbcDriver = getJdbcDriverName(JDBC_URL_H2DB);

        persistenceMap.put("javax.persistence.jdbc.driver", jdbcDriver);
        persistenceMap.put("javax.persistence.jdbc.url", JDBC_URL_H2DB);

        if (!JDBC_USERNAME_H2DB.isEmpty()) {
            persistenceMap.put("javax.persistence.jdbc.user", JDBC_USERNAME_H2DB);
        }
        if (!JDBC_PASSWORD_H2DB.isEmpty()) {
            persistenceMap.put("javax.persistence.jdbc.password", JDBC_PASSWORD_H2DB);
        }

        persistenceMap.put("eclipselink.session-name",System.currentTimeMillis() + "");

        this.emfactory = Persistence.createEntityManagerFactory(PERSISTANCE_UNIT_NAME, persistenceMap); 

    }

    public EntityManager getEntityManager()
    {               
        EntityManager entitymanager = this.emfactory.createEntityManager();
        return entitymanager;
    }

    public void closeEntityManager(EntityManager entitymanager)
    {
        if(entitymanager!=null)
            entitymanager.close();      
    }
    public void closeEntityManagerFactory()
    {
        if(this.emfactory!=null)
            this.emfactory.close();
    }

    private String getJdbcDriverName(String jdbcUrl) {
        if (jdbcUrl.startsWith("jdbc:sqlserver"))
            return JDBC_DRIVER_SQL;
        if (jdbcUrl.startsWith("jdbc:h2"))
            return JDBC_DRIVER_H2;
        if (jdbcUrl.startsWith("jdbc:hsqldb"))
            return JDBC_DRIVER_HSQL;
        return null;
    }



Test Calss:

    public class ApprovalHistoryTest {

        ApprovalHistory approvalHistory = new ApprovalHistory();

        @Before
        public void setUp() throws Exception {

            List<ApprovalHistoryModel> actionHistoryModels = new ArrayList<ApprovalHistoryModel>();     

                for(int i=0;i<=2;i++){
                ApprovalHistoryModel history = new ApprovalHistoryModel();
                String comment = "comment no. " + i;
                String reason = "reason no. " + i;
                String userName = "User" + i;
                history.taskId = "321YZ61_0026CV7Z0000XB" + i;
                history.actionDate = ISODateTimeFormat.dateTime().print(new DateTime(new Date()));
                history.actionType = i;
                history.comment = comment.trim();
                history.docId = "321YZ61_026CV7Z0000TD" + i;
                history.userName = userName;
                history.reason = reason;

                actionHistoryModels.add(history);

                }   
            approvalHistory.insertData(actionHistoryModels);
        }

        @After
        public void tearDown() throws Exception {
            DeleteApprovalHistory history = new DeleteApprovalHistory();
            try{
            history.purgeRecord(0,"DAYS");  
            approvalHistory.closeEntityManagerFactory();
        }catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
          }
        }


        @Test()
        public void test() {
            //ApprovalHistory approvalHistory = new ApprovalHistory();
            List<ApprovalHistoryModel> historyList = new ArrayList<ApprovalHistoryModel>(); 
            for(int i=0;i<=2;i++){
            ApprovalHistoryModel history = new ApprovalHistoryModel();
              try {
                  Thread.sleep(1000);
                  historyList=approvalHistory.getApprovalHistory(history.docId);
                  assertEquals("321YZ61_0026CV7Z0000XB" + i,historyList.get(i).taskId);`enter code here`
                  assertEquals("comment no. " + i,historyList.get(i).comment);
                  assertEquals("User" + i,historyList.get(i).userName);
                  assertEquals("reason no. " + i,historyList.get(i).reason);
                  assertEquals(i,historyList.get(i).actionType);


            } catch (Exception e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }   
            }
        }

    }

Persistence.xml

<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.1"
    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_1.xsd">

  <persistence-unit name="Approval_History" transaction-type="RESOURCE_LOCAL">
    <class>com.perceptivesoftware.apapproval.history.ActionTable</class>
    <class>com.perceptivesoftware.apapproval.history.BusinessObjectTable</class>
    <class>com.perceptivesoftware.apapproval.history.CommentTable</class>
    <class>com.perceptivesoftware.apapproval.history.ReasonTable</class>
    <exclude-unlisted-classes>true</exclude-unlisted-classes>
     <provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>
    <properties>
      <property name="eclipselink.ddl-generation" value="create-or-extend-tables" />
      <property name="eclipselink.logging.level.sql" value="FINE"/>
      <property name="eclipselink.logging.parameters" value="true"/>
      <property name="eclipselink.multitenant.tenants-share-cache" value="true" />          
    </properties>
  </persistence-unit>
</persistence>

Error::

Running ApprovalHistoryTest javax.persistence.PersistenceException: No Persistence provider for EntityManager named Approval_History at javax.persistence.Persistence.createEntityManagerFactory(Unknown Source) at com.perceptivesoftware.apapproval.history.ApprovalHistory.createEntityManagerFactory(ApprovalHistory.java:167) at com.perceptivesoftware.apapproval.history.ApprovalHistory.(ApprovalHistory.java:48) at ApprovalHistoryTest.(ApprovalHistoryTest.java:20) at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at java.lang.reflect.Constructor.newInstance(Constructor.java:422) at org.junit.runners.BlockJUnit4ClassRunner.createTest(BlockJUnit4ClassRunner.java:187) at org.junit.runners.BlockJUnit4ClassRunner$1.runReflectiveCall(BlockJUnit4ClassRunner.java:236) at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15) at org.junit.runners.BlockJUnit4ClassRunner.methodBlock(BlockJUnit4ClassRunner.java:233) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:68) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:47) at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231) at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60) at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229) at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50) at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222) at org.junit.runners.ParentRunner.run(ParentRunner.java:300) at org.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:252) at org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:141) at org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:112) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:497) at org.apache.maven.surefire.util.ReflectionUtils.invokeMethodWithArray(ReflectionUtils.java:189) at org.apache.maven.surefire.booter.ProviderFactory$ProviderProxy.invoke(ProviderFactory.java:165) at org.apache.maven.surefire.booter.ProviderFactory.invokeProvider(ProviderFactory.java:85) at org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:115) at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:75) javax.persistence.PersistenceException: No Persistence provider for EntityManager named Approval_History at javax.persistence.Persistence.createEntityManagerFactory(Unknown Source) at com.perceptivesoftware.apapproval.history.ApprovalHistory.createEntityManagerFactory(ApprovalHistory.java:167) at com.perceptivesoftware.apapproval.history.ApprovalHistory.(ApprovalHistory.java:48) at com.perceptivesoftware.apapproval.history.DeleteApprovalHistory.purgeRecord(DeleteApprovalHistory.java:46) at ApprovalHistoryTest.tearDown(ApprovalHistoryTest.java:50) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:497) at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:45) at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15) at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:42) at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:36) at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:68) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:47) at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231) at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60) at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229) at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50) at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222) at org.junit.runners.ParentRunner.run(ParentRunner.java:300) at org.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:252) at org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:141) at org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:112) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:497) at org.apache.maven.surefire.util.ReflectionUtils.invokeMethodWithArray(ReflectionUtils.java:189) at org.apache.maven.surefire.booter.ProviderFactory$ProviderProxy.invoke(ProviderFactory.java:165) at org.apache.maven.surefire.booter.ProviderFactory.invokeProvider(ProviderFactory.java:85) at org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:115) at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:75)

Answer 1

You've annotated the wrong attribute:

@PersistenceContext(unitName = "Approval_History")  
private Logger logger = LoggerFactory.getLogger(ApprovalHistory.class);

Should be:

@PersistenceContext(unitName = "Approval_History")  
public EntityManager em;

The @PersistenceContext annotation injects an EntityManager into your code, which is created from the EntityManagerFactory associated with the persistence unit that you specify ("Approval_History" in your case).