当我关闭休眠数据连接时,仍然存在锁定文件。
这就是我的尝试:
import java.util.HashMap;
import java.util.Map;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.Persistence;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
@Entity
public class TestEntity {
@Id
@GeneratedValue(strategy = GenerationType.TABLE)
private Long id;
@Column public String name = "";
public TestEntity() { }
}
public class TestWhyNotUnlockDatabase {
public static void main(String[] args) throws Exception {
Map<String, String> connProp = new HashMap<String,String>();
connProp.put("javax.persistence.jdbc.url","jdbc:hsqldb:file:\\Users\\Bernd\\.mld\\0.2\\solala.db;shutdown=true");
connProp.put("javax.persistence.schema-generation.database.action", "none");
System.out.println("Creating DB");
EntityManagerFactory entityManagerFactory = Persistence.createEntityManagerFactory("WhyNotUnLock",connProp);
EntityManager entityManager = entityManagerFactory.createEntityManager();
System.out.println("persisting");
entityManager.getTransaction().begin();
entityManager.persist(new TestEntity());
entityManager.getTransaction().commit();
System.out.println("closing");
entityManager.clear();
entityManager.close();
entityManagerFactory.close();
System.out.println("DB closed");
}
}
输出符合预期:
Creating DB
WARN 2017-02-36 12:59:29 [main] org.hibernate.orm.connections.pooling - HHH10001002: Using Hibernate built-in connection pool (not for production use!)
persisting
closing
DB closed
但是在程序执行结束后只有以下文件在这里:
solala.db.properties
solala.db.script
我的问题:
我原本希望数据存储在名为solala.db
的文件中,但我找不到。数据库文件在哪里?
其他一些奇怪的观察:我在Windows Eclipse IDE(Neon.2 Release(4.6.2))中执行此操作。运行此程序后退出Exclipse,Eclipse无法再启动。没有给出错误消息。只有重新安装Eclipse才有帮助(重新启动是不够的)。似乎在该计划结束后仍然存在一些人工制品。
其他信息
persitence.xml
中的主要部分:
<persistence-unit name="WhyNotUnLock" transaction-type="RESOURCE_LOCAL">
<provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>
<class>masterlist.trials.TestEntity</class>
<exclude-unlisted-classes>true</exclude-unlisted-classes>
<properties>
<property name="javax.persistence.jdbc.driver" value="org.hsqldb.jdbcDriver" />
<property name="connection.provider_class" value="org.hibernate.connection.C3P0ConnectionProvider" />
<property name="javax.persistence.jdbc.user" value="SA" />
<property name="javax.persistence.jdbc.password" value="" />
<property name="javax.persistence.jdbc.url" value="jdbc:hsqldb:file://C:\\Users\\Bernd\\.mld\\0.1\\smallDB.db"/>
<property name="hibernate.dialect" value="org.hibernate.dialect.HSQLDialect" />
<property name="hibernate.max_fetch_depth" value="3" />
<property name="hibernate.hbm2ddl.auto" value="validate" />
<property name="hibernate.max_fetch_depth" value="3" />
<property name="hibernate.hbm2ddl.auto" value="create" />
<!-- Echo all executed SQL to stdout -->
<property name="hibernate.show_sql" value="false" />
<property name="javax.persistence.schema-generation.database.action" value="none"/>
</properties>
</persistence-unit>
以及build.gradle
中的依赖项:
compile group: 'org.hibernate', name: 'hibernate-core', version: '5.2.6.Final'
compile group: 'org.hibernate', name: 'hibernate-ehcache', version: '5.2.6.Final'
compile group: 'org.hibernate', name: 'hibernate-validator', version: '5.4.0.CR1'
compile 'org.hibernate.javax.persistence:hibernate-jpa-2.1-api:1.0.0.Final'
compile group: 'org.hibernate', name: 'hibernate-c3p0', version: '5.2.6.Final'
compile 'com.enigmabridge:hibernate4-sqlite-dialect:0.1.2'
编辑1(不公开)
有人认为这个问题是enter link description here的一个共同点。我看了看这个答案。不幸的是,我无法从这个链接得到答案。在此链接中,作者需要一个内存数据库,其中所有文件在关闭后都会被删除。相反,我希望在应用程序关闭后数据库文件仍然未被查看。
修改2(shutdown=true
)
选项shutdown=true
已添加到代码中。现在锁定已被删除。无论如何数据库文件仍然缺失。问题标题改编。
答案 0 :(得分:0)
部分回答:
设置shutdown=true
删除了临时文件和锁定文件:
connProp.put("javax.persistence.jdbc.url","jdbc:hsqldb:file:\\Users\\Bernd\\.mld\\0.2\\solala.db;shutdown=true");
不仅剩下两个文件:
solala.db.properties
solala.db.script
我仍在搜索solala.db