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## org.springframework.jdbc.support
Class DatabaseStartupValidator

    java.lang.Object
      org.springframework.jdbc.support.DatabaseStartupValidator

All Implemented Interfaces:
  InitializingBean

    public class DatabaseStartupValidator

extends Object
implements InitializingBean

Bean that checks if a database has already started up. To be referenced via "depends-on" from beans that depend on database startup, like a Hibernate SessionFactory or custom data access objects that access a DataSource directly.

Useful to defer application initialization until a database has started up. Particularly appropriate for waiting on a slowly starting Oracle database.

Since:
  18.12.2003
Author:
  Juergen Hoeller

Field Summary
`static int` | `DEFAULT_INTERVAL`
`static int` | `DEFAULT_TIMEOUT`
`protected Log` | `logger`

Constructor Summary
`DatabaseStartupValidator()`

Method Summary
`void` | `afterPropertiesSet()` Check whether the validation query can be executed on a Connection from the specified DataSource, with the specified interval between checks, until the specified timeout.
`void` | `setDataSource(DataSource dataSource)` Set the DataSource to validate.
`void` | `setInterval(int interval)` Set the interval between validation runs (in seconds).
`void` | `setTimeout(int timeout)` Set the timeout (in seconds) after which a fatal exception will be thrown.
`void` | `setValidationQuery(String validationQuery)` Set the SQL query string to use for validation.

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Field Detail

### DEFAULT_INTERVAL

    public static final int DEFAULT_INTERVAL

See Also:
  Constant Field Values

### DEFAULT_TIMEOUT

    public static final int DEFAULT_TIMEOUT

See Also:
  Constant Field Values

### logger

    protected final Log logger

Constructor Detail

### DatabaseStartupValidator

    public DatabaseStartupValidator()

Method Detail

### setDataSource

    public void setDataSource(DataSource dataSource)

  Set the DataSource to validate.

### setValidationQuery

    public void setValidationQuery(String validationQuery)

  Set the SQL query string to use for validation.

### setInterval

    public void setInterval(int interval)

  Set the interval between validation runs (in seconds). Default is 1.

### setTimeout

    public void setTimeout(int timeout)

  Set the timeout (in seconds) after which a fatal exception will be thrown. Default is 60.

### afterPropertiesSet

    public void afterPropertiesSet()

  Check whether the validation query can be executed on a Connection from the specified DataSource, with the specified interval between checks, until the specified timeout.

  Specified by:
    `afterPropertiesSet` in interface `InitializingBean`

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