本文整理了Java中javax.jdo.Transaction.setNontransactionalRead()方法的一些代码示例，展示了Transaction.setNontransactionalRead()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Transaction.setNontransactionalRead()方法的具体详情如下：
包路径：javax.jdo.Transaction
类名称：Transaction
方法名：setNontransactionalRead

Transaction.setNontransactionalRead介绍

[英]If true, allow persistent instances to be read without a transaction active. If an implementation does not support this option, a JDOUnsupportedOptionException is thrown.
[中]如果为true，则允许在不激活事务的情况下读取持久实例。如果实现不支持此选项，将抛出JDOUnsupportedOptionException。

代码示例

代码示例来源：origin: tzaeschke/zoodb

private void executeQueries() {
  pm = ZooJdoHelper.openDB(DB_FILE);
  
  //set non-transactional read to 'true', but don't begin() yet.
  pm.currentTransaction().setNontransactionalRead(true);
  
  //use queries and navigation outside of a transaction:
  queryForPeople();
  queryForCoursesByTeacher("Albert Einstein");
  // now, if we want to change something, we can open a trancaction
  pm.currentTransaction().begin();
  // change something here
  pm.currentTransaction().commit();
  pm.close();
  pm = null;
}

代码示例来源：origin: tzaeschke/zoodb

@Test
public void testMultiSession3() {
  //test that multi-session is not possible with non-tx-read enabled
  //TODO this should be updated once non-tx read works with multiple sessions
  PersistenceManager pm1 = TestTools.openPM();
  PersistenceManager pm2 = TestTools.openPM();
  try {
    pm2.currentTransaction().setNontransactionalRead(true);
    fail();
  } catch (JDOFatalException e) {
    
  }
  pm1.close();
}

代码示例来源：origin: tzaeschke/zoodb

pm.currentTransaction().setNontransactionalRead(true);
q1.execute();
q2.execute();

代码示例来源：origin: tzaeschke/zoodb

pm.currentTransaction().setNontransactionalRead(true);
ex.iterator().hasNext();

代码示例来源：origin: tzaeschke/zoodb

pm = pmf.getPersistenceManager();
assertFalse(pm.currentTransaction().getNontransactionalRead());
pm.currentTransaction().setNontransactionalRead(true);
assertTrue(pm.currentTransaction().getNontransactionalRead());
pm.currentTransaction().setNontransactionalRead(false);
assertFalse(pm.currentTransaction().getNontransactionalRead());
pm.close();
pm = pmf.getPersistenceManager();
assertTrue(pm.currentTransaction().getNontransactionalRead());
pm.currentTransaction().setNontransactionalRead(false);
assertFalse(pm.currentTransaction().getNontransactionalRead());
pm.currentTransaction().setNontransactionalRead(true);
assertTrue(pm.currentTransaction().getNontransactionalRead());
pm.close();

代码示例来源：origin: tzaeschke/zoodb

pm.currentTransaction().setNontransactionalRead(false);
pm.currentTransaction().setNontransactionalRead(true);