org.apache.jackrabbit.webdav.jcr.observation
Class SubscriptionImpl

java.lang.Object
  org.apache.jackrabbit.webdav.jcr.observation.SubscriptionImpl

All Implemented Interfaces:

EventListener, ObservationConstants, Subscription, XmlSerializable

public class SubscriptionImpl
extends Object
implements Subscription, ObservationConstants, EventListener

The Subscription class encapsulates a single subscription with the following responsibilities:

• Providing access to the subscription info,
• Recording events this subscription is interested in,
• Providing access to the events.

Field Summary

Fields inherited from interface org.apache.jackrabbit.webdav.observation.ObservationConstants

HEADER_POLL_TIMEOUT, HEADER_SUBSCRIPTIONID, NAMESPACE, SUBSCRIPTIONDISCOVERY, XML_EVENT, XML_EVENT_TRANSACTION_ID, XML_EVENTBUNDLE, XML_EVENTDISCOVERY, XML_EVENTTYPE, XML_EVENTUSERID, XML_FILTER, XML_NODETYPE_NAME, XML_NOLOCAL, XML_SUBSCRIPTION, XML_SUBSCRIPTIONID, XML_SUBSCRIPTIONINFO, XML_UUID

Constructor Summary

SubscriptionImpl(SubscriptionInfo info, ObservationResource resource)
Create a new Subscription with the given SubscriptionInfo and resource.

Method Summary

static EventType	getEventType(int jcrEventType) Static utility method to convert the type defined by a JCR event into an EventType object.
static int	getJcrEventType(EventType eventType) Static utility method to convert an EventType as present in the Xml body into the corresponding JCR event constant defined by Event.
String	getSubscriptionId() Returns the id of this subscription.
void	onEvent(EventIterator events) Records the events passed as a new event bundle in order to make them available with the next discoverEvents(long) request.
Element	toXml(Document document) Return the Xml representation of this Subscription as required for the SubscriptionDiscovery webdav property that in included in the response body of a sucessful SUBSCRIBE request or as part of a PROPFIND response.

Methods inherited from class java.lang.Object

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

Constructor Detail

SubscriptionImpl

public SubscriptionImpl(SubscriptionInfo info,
                        ObservationResource resource)
                 throws DavException

Create a new Subscription with the given SubscriptionInfo and resource.

Parameters:

info -

resource -

Throws:

DavException - if resource is not based on a JCR repository or the repository does not support observation.

Method Detail

getSubscriptionId

public String getSubscriptionId()

Returns the id of this subscription.

Specified by:

getSubscriptionId in interface Subscription

Returns:

subscriptionId

toXml

public Element toXml(Document document)

Return the Xml representation of this Subscription as required for the SubscriptionDiscovery webdav property that in included in the response body of a sucessful SUBSCRIBE request or as part of a PROPFIND response.

Specified by:

toXml in interface XmlSerializable

Parameters:

document -

Returns:

Xml representation

See Also:

XmlSerializable.toXml(Document)

onEvent

public void onEvent(EventIterator events)

Records the events passed as a new event bundle in order to make them available with the next discoverEvents(long) request. If this subscription is expired it will remove itself as listener from the observation manager.

Specified by:

onEvent in interface EventListener

Parameters:

events - to be recorded.

See Also:

EventListener.onEvent(EventIterator), discoverEvents(long)

getEventType

public static EventType getEventType(int jcrEventType)

Static utility method to convert the type defined by a JCR event into an EventType object.

Parameters:

jcrEventType -

Returns:

EventType representation of the given JCR event type.

Throws:

IllegalArgumentException - if the given int does not represent a valid type constants as defined by Event.
Valid values are

• Event.NODE_ADDED
• Event.NODE_REMOVED
• Event.PROPERTY_ADDED
• Event.PROPERTY_REMOVED
• Event.PROPERTY_CHANGED

getJcrEventType

public static int getJcrEventType(EventType eventType)
                           throws DavException

Static utility method to convert an EventType as present in the Xml body into the corresponding JCR event constant defined by Event.

Parameters:

eventType -

Returns:

Any of the event types defined by Event.
Possible values are

• Event.NODE_ADDED
• Event.NODE_REMOVED
• Event.PROPERTY_ADDED
• Event.PROPERTY_REMOVED
• Event.PROPERTY_CHANGED

Throws:

DavException - if the given event type does not define a valid JCR event type, such as returned by getEventType(int).