Package org.apache.activemq.web

Class MessageServletSupport

java.lang.Object

javax.servlet.GenericServlet

javax.servlet.http.HttpServlet

org.apache.activemq.web.MessageServletSupport

All Implemented Interfaces:

Serializable, Servlet, ServletConfig

Direct Known Subclasses:

MessageListenerServlet, MessageServlet, PortfolioPublishServlet

public abstract class MessageServletSupport
extends HttpServlet

A useful base class for any JMS related servlet; there are various ways to map JMS operations to web requests so we put most of the common behaviour in a reusable base class. This servlet can be configured with the following init parameters

topic

Set to 'true' if the servlet should default to using topics rather than channels

destination

The default destination to use if one is not specifiied

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor	Description
MessageServletSupport()

Method Summary

Modifier and Type	Method	Description
protected void	appendParametersToMessage(HttpServletRequest request, TextMessage message)
static boolean	asBoolean(String param)
static boolean	asBoolean(String param, boolean defaultValue)
protected Destination	asDestination(Object value)
protected int	asInt(String name)
protected Integer	asInteger(Object value)
protected Long	asLong(Object value)
protected long	asLong(String name)
protected String	asString(Object value)
protected Destination	getDestination(WebClient client, HttpServletRequest request)
protected Destination	getDestination(WebClient client, HttpServletRequest request, String destinationName)
protected Destination	getDestinationFromURI(WebClient client, HttpServletRequest request)
protected String	getPostedMessageBody(HttpServletRequest request)
protected String	getSelector(HttpServletRequest request)
protected int	getSendPriority(HttpServletRequest request)
protected long	getSendTimeToLive(HttpServletRequest request)
void	init(ServletConfig servletConfig)
protected boolean	isSendPersistent(HttpServletRequest request)
protected boolean	isSync(HttpServletRequest request)
protected boolean	isTopic(HttpServletRequest request)

Methods inherited from class javax.servlet.http.HttpServlet

doDelete, doGet, doHead, doOptions, doPost, doPut, doTrace, getLastModified, service, service

Methods inherited from class javax.servlet.GenericServlet

destroy, getInitParameter, getInitParameterNames, getServletConfig, getServletContext, getServletInfo, getServletName, init, log, log

Methods inherited from class java.lang.Object

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

Constructor Detail

MessageServletSupport

public MessageServletSupport()

Method Detail

init

public void init(ServletConfig servletConfig)
          throws ServletException

Specified by:

init in interface Servlet

Overrides:

init in class GenericServlet

Throws:

ServletException

asBoolean

public static boolean asBoolean(String param)

asBoolean

public static boolean asBoolean(String param,
                                boolean defaultValue)

appendParametersToMessage

protected void appendParametersToMessage(HttpServletRequest request,
                                         TextMessage message)
                                  throws JMSException

Throws:

JMSException

getSendTimeToLive

protected long getSendTimeToLive(HttpServletRequest request)

getSendPriority

protected int getSendPriority(HttpServletRequest request)

isSendPersistent

protected boolean isSendPersistent(HttpServletRequest request)

isSync

protected boolean isSync(HttpServletRequest request)

asDestination

protected Destination asDestination(Object value)

asInteger

protected Integer asInteger(Object value)

asLong

protected Long asLong(Object value)

asLong

protected long asLong(String name)

asInt

protected int asInt(String name)

asString

protected String asString(Object value)

getDestination

protected Destination getDestination(WebClient client,
                                     HttpServletRequest request)
                              throws JMSException

Returns:

the destination to use for the current request

Throws:

JMSException

getDestinationFromURI

protected Destination getDestinationFromURI(WebClient client,
                                            HttpServletRequest request)
                                     throws JMSException

Returns:

the destination to use for the current request using the relative URI from where this servlet was invoked as the destination name

Throws:

JMSException

getDestination

protected Destination getDestination(WebClient client,
                                     HttpServletRequest request,
                                     String destinationName)
                              throws JMSException

Returns:

the Destination object for the given destination name

Throws:

JMSException

isTopic

protected boolean isTopic(HttpServletRequest request)

Returns:

true if the current request is for a topic destination, else false if its for a queue

getPostedMessageBody

protected String getPostedMessageBody(HttpServletRequest request)
                               throws IOException

Returns:

the text that was posted to the servlet which is used as the body of the message to be sent

Throws:

IOException

getSelector

protected String getSelector(HttpServletRequest request)
                      throws IOException

Throws:

IOException