Question

我有以下测试方法（基于以前创建和工作的测试用例）：

`public class CommentGenericDaoHibernateImplTest { 私人评论评论; private ReqCandAssociation reqCandAssc; 私人JobReq JOBREQ; 私人候选人候选人;

private ClassPathXmlApplicationContext ctx;
private GenericDao<Comment, Integer> dao;
private GenericDao<JobReq, Integer> reqDao;
private GenericDao<Candidate, Integer> candDao;
private GenericDao<ReqCandAssociation, Integer> reqCandDao;

@SuppressWarnings("unchecked")
@Before
public void setUp() {


    JOBREQ = new JobReq("TTYL", "Title", "contract", "project", "laborCategory", "summary", "jobDescription", "status", "TTONumber", new Date(), new Date(), "location", "lead", "leadEmail", "reason", "duration", "recruiter", "openingType", new Date(), "f", "2");
    CANDIDATE = new Candidate("candName", "email", "phoneNum", "title", "mainStatus", new Date(), new Date(), new Date(), "none", "skillsSummary", "costRate", "clearanceType", new Date(), "contingentHire", "submittingCompany", "employingCompany", "5");
    reqCandAssc = new ReqCandAssociation(CANDIDATE, JOBREQ, "Hired");

    comment = new Comment("CommentGenericDaoHibernateImplTest TEST COMMENT", new Date(), reqCandAssc);

    ctx = new ClassPathXmlApplicationContext("applicationContext.xml");

    reqDao = (GenericDaoHibernateImpl<JobReq, Integer>) ctx.getBean("jobReqDao");
    candDao = (GenericDaoHibernateImpl<Candidate, Integer>) ctx.getBean("candDao");
    reqCandDao = (GenericDaoHibernateImpl<ReqCandAssociation, Integer>) ctx.getBean("reqCandDao");
    dao = (GenericDaoHibernateImpl<Comment, Integer>) ctx.getBean("commentDao");

    reqDao.create(JOBREQ);
    candDao.create(CANDIDATE);
    reqCandDao.create(reqCandAssc);


}

@Test
public void testCreatingComment() {
    try {           
        Integer key = reqDao.create(comment);
        assertTrue("attachment not created successfully!", key > 0);
    } finally {
        if (ctx != null) {
            ctx.close();
        }
    }
}

@Test
public void testRetrievingCommentByIdAfterCreate() {
    try {           
        Integer key = dao.create(comment);
        Comment retrievedComment = dao.read(key);
        assertEquals("Could not find attachment with id = "+key, retrievedComment, comment);
    } finally {
        if (ctx != null) {
            ctx.close();
        }
    }
}

@Test
public void testUpdatingCommentAfterCreate() {
    try {

        Integer key = dao.create(comment);
        comment.setComment("ALTERED");
        dao.update(comment);
        Comment retrievedComment = dao.read(key);
        assertEquals("Could not update attachment with id = "+key, 
        comment.getComment(), retrievedComment.getComment());
    } finally {
        if (ctx != null) {
            ctx.close();
        }
    }
}

@Test
public void testDeletingCommentAfterCreate() {
    try {

        comment.setCommentDate(new Date());
        Integer key = dao.create(comment);
        assertTrue("attachment not created successfully!", key > 0);

        dao.delete(comment);

        Comment queriedComment = dao.read(key);
        assertNull("Could not delete attachment with id = "+key, queriedComment);
    } finally {
        if (ctx != null) {
            ctx.close();
        }
    }
}

@Test
public void testRetrievingAllCommentsAfterCreate() {
    try {           
        Integer key = dao.create(comment);
        assertTrue("attachment not created successfully!", key > 0);

        List<Comment> queriedAttachmentList = dao.findAll();
        assertEquals("Could not list all attachment", 1, queriedAttachmentList.size());
    } finally {
        if (ctx != null) {
            ctx.close();
        }
    }
}

}`

在这样的方法中使用hibernate：

@SuppressWarnings("unchecked") public PK create(T o) { Session hibernateSession = this.getSession(); PK id = null; try { hibernateSession.beginTransaction(); id = (PK) hibernateSession.save(o); hibernateSession.getTransaction().commit(); } finally { hibernateSession.close(); } return id; }

对DB采取行动。现在，Comment实体位于具有ReqCandAssociation的OneToMany中，而ReqCandAssociation又是JobReq和Candidate的ManyToMany解析表。所以基本上我需要创建一个JobReq，Candidate，然后我可以创建一个ReqCandAssociation，然后一个注释附加到One ReqCandAssociation对象。但是，每当我尝试向数据库添加多个对象时，我就会在MySQL的进程中获得Waiting for table metadata lock。

我尝试过一次测试创建一个实体，它允许我制作一个候选人或一个jobreq并添加一个jobreq（而不是一个评论，用于测试）但是一旦我尝试添加一个候选人和一个工作req然后做别的事我得到了锁。我也尝试在@Test方法本身而不是在设置中添加这些先决条件对象。

Answer 1

经过相当多的挖掘后发现，如果你的测试抛出一个错误它会锁定数据库，由于某种原因，这些Junit测试没有显示语法错误突出显示正常类和（似乎）编译正常。我的一个对象构造函数中的错误值导致了错误。

在经过大量策略性放置System.out.println（）的

之后想出来了

Junit测试导致Mysql元数据锁定

1 个答案: