DatabaseStartupValidator (Spring Framework API 2.1) - Spring Framework 2.1.0 API 文档英文版

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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
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 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