Question

我有一个Java应用程序，通过Hibernate连接到MySQL数据库。

我已经编写了一个用于测试数据库连接的测试，但它永远不会结束。两个线程正在运行，但是我在测试中编写的所有代码都已执行。这两个主题是：

Thread [pool-1-thread-1] (Running)  
Thread [DestroyJavaVM] (Running)

以下是我的测试文件：

Vote v1 = new Vote(0, "abc");
Vote v2 = new Vote(1, "def");
Candidate c1 = new Candidate(0, "First Candidate");
Timestamp t = new Timestamp(0, 123456l);

EntityManager entMgr = EntityManagerUtil.getEntityManagerFactory().createEntityManager();
EntityTransaction transaction = entMgr.getTransaction();
transaction.begin();

VoteRepository vr = new VoteRepository(entMgr);
entMgr.persist(v1);
entMgr.persist(v2);

CandidateRepository cr = new CandidateRepository(entMgr);
entMgr.persist(c1);

TimestampRepository tr = new TimestampRepository(entMgr);
entMgr.persist(t);

transaction.commit();
entMgr.close();

我的persistence.xml如下所示：

<provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>
    <!-- This is where we tell JPA/Hibernate about our @Entity objects -->
    <class>org.evoting.database.entities.Candidate</class>
    <class>org.evoting.database.entities.Timestamp</class>
    <class>org.evoting.database.entities.Vote</class>

<properties>
    <property name="javax.persistence.jdbc.driver" value="com.mysql.jdbc.Driver" />
    <property name="javax.persistence.jdbc.url" value="jdbc:mysql://url" />
    <property name="javax.persistence.jdbc.user" value="***" />
    <property name="javax.persistence.jdbc.password" value="***" />
    <property name="hibernate.dialect" value="org.hibernate.dialect.MySQLDialect" />

    <!-- Update the database schema on startup: "update"; "validate" to only check -->
    <property name="hibernate.hbm2ddl.auto" value="update" />

    <!-- Echo all executed SQL to stdout -->
    <property name="hibernate.show_sql" value="true" />

    <!-- Disable the second-level cache -->
    <property name="hibernate.cache.provider_class" value="org.hibernate.cache.NoCacheProvicer" />

    <property name="hibernate.format_sql" value="true" />
    <property name="hibernate.transaction.flush_before_completion" value="true" />
    <property name="hibernate.connection.autocommit" value="false" />
    <property name="hibernate.connection.release_mode" value="after_transaction" />
</properties>

什么可能导致测试永远不会完成？

Answer 1

我发现我必须关闭EntityManagerFactory才能完成测试。而不是

entMgr.close();

我应该写

entMgr.getEntityManagerFactory.close();

通过这条新线，测试结束，每个人都很高兴：）

Hibernate测试没有完成

1 个答案: