org.quartz.ee.servlet

Class QuartzInitializerServlet

java.lang.Object

HttpServlet

org.quartz.ee.servlet.QuartzInitializerServlet

public class QuartzInitializerServlet
extends HttpServlet

A Servlet that can be used to initialize Quartz, if configured as a load-on-startup servlet in a web application.

Using this start-up servlet may be preferred to using the QuartzInitializerListener in some situations - namely when you want to initialize more than one scheduler in the same application.

You'll want to add something like this to your WEB-INF/web.xml file:

     <servlet>
         <servlet-name>
             QuartzInitializer
         </servlet-name>
         <display-name>
             Quartz Initializer Servlet
         </display-name>
         <servlet-class>
             org.quartz.ee.servlet.QuartzInitializerServlet
         </servlet-class>
         <load-on-startup>
             1
         </load-on-startup>
         <init-param>
             <param-name>config-file</param-name>
             <param-value>/some/path/my_quartz.properties</param-value>
         </init-param>
         <init-param>
             <param-name>shutdown-on-unload</param-name>
             <param-value>true</param-value>
         </init-param>
         <init-param>
             <param-name>wait-on-shutdown</param-name>
             <param-value>true</param-value>
         </init-param>
         <init-param>
             <param-name>start-scheduler-on-load</param-name>
             <param-value>true</param-value>
         </init-param>
     </servlet>
 

The init parameter 'config-file' can be used to specify the path (and filename) of your Quartz properties file. If you leave out this parameter, the default ("quartz.properties") will be used.

The init parameter 'shutdown-on-unload' can be used to specify whether you want scheduler.shutdown() called when the servlet is unloaded (usually when the application server is being shutdown). Possible values are "true" or "false". The default is "true".

The init parameter 'wait-on-shutdown' has effect when 'shutdown-on-unload' is specified "true", and indicates whether you want scheduler.shutdown(true) called when the listener is unloaded (usually when the application server is being shutdown). Passing "true" to the shutdown() call causes the scheduler to wait for existing jobs to complete. Possible values are "true" or "false". The default is "false".

The init parameter 'start-scheduler-on-load' can be used to specify whether you want the scheduler.start() method called when the servlet is first loaded. If set to false, your application will need to call the start() method before the scheduler begins to run and process jobs. Possible values are "true" or "false". The default is "true", which means the scheduler is started.

A StdSchedulerFactory instance is stored into the ServletContext. You can gain access to the factory from a ServletContext instance like this:

     StdSchedulerFactory factory = (StdSchedulerFactory) ctx
                .getAttribute(QuartzFactoryServlet.QUARTZ_FACTORY_KEY);

The init parameter 'servlet-context-factory-key' can be used to override the name under which the StdSchedulerFactory is stored into the ServletContext, in which case you will want to use this name rather than QuartzFactoryServlet.QUARTZ_FACTORY_KEY in the above example.

The init parameter 'scheduler-context-servlet-context-key' if set, the ServletContext will be stored in the SchedulerContext under the given key name (and will therefore be available to jobs during execution).

The init parameter 'start-delay-seconds' can be used to specify the amount of time to wait after initializing the scheduler before scheduler.start() is called.

Once you have the factory instance, you can retrieve the Scheduler instance by calling getScheduler() on the factory.

Author:

James House, Chuck Cavaness

Field Summary

Fields

Modifier and Type	Field and Description
static String	QUARTZ_FACTORY_KEY

Constructor Summary

Constructors

Constructor and Description
QuartzInitializerServlet()

Method Summary

Methods

Modifier and Type	Method and Description
void	destroy()
void	doGet(HttpServletRequest request, HttpServletResponse response)
void	doPost(HttpServletRequest request, HttpServletResponse response)
protected StdSchedulerFactory	getSchedulerFactory(String configFile)
void	init(ServletConfig cfg)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

QUARTZ_FACTORY_KEY

public static final String QUARTZ_FACTORY_KEY

See Also:

Constant Field Values

Constructor Detail

QuartzInitializerServlet

public QuartzInitializerServlet()

Method Detail

init

public void init(ServletConfig cfg)
          throws javax.servlet.ServletException

Throws:

javax.servlet.ServletException

getSchedulerFactory

protected StdSchedulerFactory getSchedulerFactory(String configFile)
                                           throws SchedulerException

Throws:

SchedulerException

destroy

public void destroy()

doPost

public void doPost(HttpServletRequest request,
          HttpServletResponse response)
            throws ServletException,
                   IOException

Throws:

ServletException

IOException

doGet

public void doGet(HttpServletRequest request,
         HttpServletResponse response)
           throws ServletException,
                  IOException

Throws:

ServletException

IOException