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当两个线程一起工作时,我想要restirict用户表更新,这引发了“行被更新或删除的另一个事务(或未保存的值映射不正确):[com .dmainc.commons.security.User#4]“ 。当第二个线程先击中时开始回滚并抛出异常。 实际上每个线程都在修改passwordAttemptDate.I,每次用户登录时都需要更新这个字段,如何对这两个线程同时执行这个操作。我在一个事务中调用这个方法。行被更新或删除的另一个事务 - 多线程
任何建议都会得到满足。
public AuthenticationStatus authenticateEncrypted(User user, String password, ISecurityParameters params,
Boolean encryptedPassword)
{
AuthenticationStatus status = new AuthenticationStatus();
status.setUser(user);
status.setStatus(AuthenticationStatus.Status.UNKNOWN_ERROR);
// hash password
String hashedPass = (encryptedPassword == true ? password : hashPassword(password, user.getSalt()));
// compare to stored password and check on attempts if failed
if(hashedPass.equals(user.getPassword()))
{
user.setPasswordAttempts(0);
//THIS IS GETTING UPDATED EACH TIME
user.setPasswordAttemptDate(Calendar.getInstance());
if(getPasswordNotify(user, params) >= 0)
{
status.setStatus(AuthenticationStatus.Status.SUCCESS_NOTIFY);
}
else if(isPasswordExpired(user, params))
{
status.setStatus(AuthenticationStatus.Status.PASSWORD_EXPIRED);
}
else
{
status.setStatus(AuthenticationStatus.Status.SUCCESS);
}
status.setArg(arg);
return status;
}
else
{
user.setPasswordAttempts((user.getPasswordAttempts() == null) ? 1 : user.getPasswordAttempts() + 1);
user.setPasswordAttemptDate(Calendar.getInstance());
status.setStatus(AuthenticationStatus.Status.FAIL);
}
}
catch(Exception pe)
{
if(LOG.isErrorEnabled())
LOG.error(pe, pe);
}
return status;
}
User.hbm.xml
<hibernate-mapping>
<class name="com.dmainc.commons.security.User" table="userdata">
<id name="userId" type="long">
<column name="UserId" />
<generator class="native" />
</id>
<version name="version" type="int">
<column name="Version" not-null="true" />
</version>
<property name="username" type="string">
<column name="Username" length="50" not-null="true" />
</property>
<property name="firstName" type="string">
<column name="FirstName" length="50" />
</property>
<property name="lastName" type="string">
<column name="LastName" length="50" />
</property>
<property name="email" type="string">
<column name="Email" length="50" />
</property>
<property name="status" type="string">
<column name="Status" length="2" />
</property>
<property name="passwordAttempts" type="int">
<column name="PasswordAttempts" />
</property>
<property name="passwordAttemptDate" type="calendar">
<column name="PasswordAttemptDate" length="19" />
<many-to-one name="organization" class="com.dmainc.commons.security.Organization" fetch="select">
<column name="OrganizationId" />
</many-to-one>
<set name="userpasswords" table="userpasswords" inverse="true" lazy="true" fetch="select" cascade="all,delete-orphan">
<key>
<column name="UserId" not-null="true" />
</key>
<one-to-many class="com.dmainc.commons.security.UserPassword" />
</set>
<bag name="userroles" table="userrole" inverse="true" lazy="false" fetch="select" cascade="all,delete-orphan">
<key>
<column name="UserId" not-null="true" />
</key>
<one-to-many class="com.dmainc.commons.security.UserRole" />
</bag>
</class>
你应该用那么Session.lock(对象entitty,LockMode锁)。通常,您要么使用LockMode.PESSIMISTIC_WRITE要么使用LockMode.UPGRADE_NOWAIT。后一个选项仅适用于支持select ..... for update no等语法的数据库系统(例如Oracle,Sql服务器)。请注意,在更改锁定模式时,您可能必须增加trasacaction超时) –
当我从hbm中删除版本时它的工作正常,这可能是一个可能的解决方法吗?将删除它的影响是什么?@dsp_user – Surya
可能是因为Hibernate使用乐观锁定(https://www.intertech.com/Blog/versioning-optimistic-locking-in-hibernate/) –