如何使用 Apache DBCP 1.4 创建数据源？

Question

我正在尝试这个：

final PoolableConnectionFactory factory = new PoolableConnectionFactory(
  new DriverManagerConnectionFactory("jdbc:hsqldb:mem:testdb", "sa", ""),
  new GenericObjectPool(null),
  null,
  "SELECT 1 from INFORMATION_SCHEMA.SYSTEM_USERS",
  true,
  false,
  Connection.TRANSACTION_NONE
);
DataSource ds = new PoolingDataSource(factory.getPool());
ds.getConnection();

无济于事，抛出异常：

java.util.NoSuchElementException: Could not create a validated object, cause: Invalid argument in JDBC call
    at org.apache.commons.pool.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:1191)
    at org.apache.commons.dbcp.PoolingDataSource.getConnection(PoolingDataSource.java:106)

怎么了？

Answer 1

尝试像这样设置您的 PoolableConnectionFactory

PoolableConnectionFactory factory = new PoolableConnectionFactory(
  new DriverManagerConnectionFactory("jdbc:hsqldb:mem:testdb", "sa", ""), 
  new GenericObjectPool(null), 
  null, null, false, true);

并检查它是否以这种方式工作。然后检查事务相关的额外参数在DBCP版本中是否有效。