org.wso2.carbon.dataservices.core.description.event

Class EventTrigger

java.lang.Object

org.wso2.carbon.dataservices.core.description.event.EventTrigger

Direct Known Subclasses:

XPathEventTrigger

public abstract class EventTrigger
extends Object

This class represents an .. element in a dbs. Which is used to define a event trigger that can be specified in queries (input and output sections).

Field Summary

Fields

Modifier and Type	Field and Description
static String	EVENT_DISPATCHER_NAME

Constructor Summary

Constructors

Constructor and Description
EventTrigger(DataService dataService, String language, String triggerId, String expression, String targetTopic, List<String> endpointUrls)

Method Summary

Methods

Modifier and Type	Method and Description
protected abstract boolean	evaluate(org.apache.axiom.om.OMElement input) This class must be implemented by a concrete implementation of the EventTrigger class, to provide the logic in evaluating the XML input.
void	execute(org.apache.axiom.om.OMElement input, String queryId) Executes the event trigger, this uses the "evaluate" method to check if an event should be fired, if so, it sends out the event notification.
DataService	getDataService()
List<String>	getEndpointUrls()
String	getExpression()
String	getLanguage()
String	getTargetTopic()
String	getTriggerId()
void	processEventTriggerSubscriptions()

Methods inherited from class java.lang.Object

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

Field Detail

EVENT_DISPATCHER_NAME

public static final String EVENT_DISPATCHER_NAME

See Also:

Constant Field Values

Constructor Detail

EventTrigger

public EventTrigger(DataService dataService,
            String language,
            String triggerId,
            String expression,
            String targetTopic,
            List<String> endpointUrls)
             throws DataServiceFault

Throws:

DataServiceFault

Method Detail

processEventTriggerSubscriptions

public void processEventTriggerSubscriptions()

getDataService

public DataService getDataService()

getLanguage

public String getLanguage()

getTriggerId

public String getTriggerId()

getExpression

public String getExpression()

getTargetTopic

public String getTargetTopic()

getEndpointUrls

public List<String> getEndpointUrls()

evaluate

protected abstract boolean evaluate(org.apache.axiom.om.OMElement input)
                             throws DataServiceFault

This class must be implemented by a concrete implementation of the EventTrigger class, to provide the logic in evaluating the XML input.

Parameters:

input - input as an OMElement

Returns:

a boolean

Throws:

DataServiceFault - DataServiceFault

execute

public void execute(org.apache.axiom.om.OMElement input,
           String queryId)
             throws DataServiceFault

Executes the event trigger, this uses the "evaluate" method to check if an event should be fired, if so, it sends out the event notification.

Throws:

DataServiceFault