org.apache.sling.api.resource.observation

Class ResourceChange

java.lang.Object

org.apache.sling.api.resource.observation.ResourceChange

@ConsumerType
public class ResourceChange
extends java.lang.Object

A resource change event is immutable. A change event can either be local or external. Local changes happened on the same instance, while external changes happened on a different instance. Resource listeners only receive external changes if they mark themselves as a ExternalResourceChangeListener. For all events (local and external), the path and the type of change is set. Resource provider events are always local events and only provide the path. Local events for resources provide the names of the properties that have been added, removed or changed. This information might be missing for external events.

Since:

1.0.0 (Sling API Bundle 2.11.0)

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	ResourceChange.ChangeType The type of the change

Constructor Summary

Constructors

Constructor and Description
ResourceChange(ResourceChange.ChangeType changeType, java.lang.String path, boolean isExternal) Create a new change object
ResourceChange(ResourceChange.ChangeType changeType, java.lang.String path, boolean isExternal, java.util.Set<java.lang.String> addedPropertyNames, java.util.Set<java.lang.String> changedPropertyNames, java.util.Set<java.lang.String> removedPropertyNames) Deprecated. The sets of property names are not supported anymore.

Method Summary

Modifier and Type	Method and Description
java.util.Set<java.lang.String>	getAddedPropertyNames() Deprecated. As there is no guarantee that this information is contained in the change event, this should not be used anymore.
java.util.Set<java.lang.String>	getChangedPropertyNames() Deprecated. As there is no guarantee that this information is contained in the change event, this should not be used anymore.
java.lang.String	getPath() Get the resource path.
java.util.Set<java.lang.String>	getRemovedPropertyNames() Deprecated. As there is no guarantee that this information is contained in the change event, this should not be used anymore.
ResourceChange.ChangeType	getType() Get the type of change
java.lang.String	getUserId() Get the user id of the user initiating the change
boolean	isExternal() Is this an external event?
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

ResourceChange

public ResourceChange(@Nonnull
                      ResourceChange.ChangeType changeType,
                      @Nonnull
                      java.lang.String path,
                      boolean isExternal)

Create a new change object

Parameters:

changeType - The change type

path - The resource path

isExternal - {code true} if the change happened on another node

Since:

1.2.0 (Sling API Bundle 2.15.0)

ResourceChange

@Deprecated
public ResourceChange(@Nonnull
                                  ResourceChange.ChangeType changeType,
                                  @Nonnull
                                  java.lang.String path,
                                  boolean isExternal,
                                  java.util.Set<java.lang.String> addedPropertyNames,
                                  java.util.Set<java.lang.String> changedPropertyNames,
                                  java.util.Set<java.lang.String> removedPropertyNames)

Deprecated. The sets of property names are not supported anymore.

Create a new change object

Parameters:

changeType - The change type

path - The resource path

isExternal - {code true} if the change happened on another node

addedPropertyNames - set of added property names, if provided must be immutable

changedPropertyNames - set of added property names, if provided must be immutable

removedPropertyNames - set of added property names, if provided must be immutable

Method Detail

getPath

@Nonnull
public java.lang.String getPath()

Get the resource path.

Returns:

The path to the resource.

getUserId

@CheckForNull
public java.lang.String getUserId()

Get the user id of the user initiating the change

Returns:

The user id or null if it's not available.

isExternal

public boolean isExternal()

Is this an external event?

Returns:

true if the event is external.

getType

@Nonnull
public ResourceChange.ChangeType getType()

Get the type of change

Returns:

The type of change

getChangedPropertyNames

@Deprecated
 @CheckForNull
public java.util.Set<java.lang.String> getChangedPropertyNames()

Deprecated. As there is no guarantee that this information is contained in the change event, this should not be used anymore.

Optional information about changed properties. The application code can not rely on getting the correct set of changed properties. A resource provider implementation is free to not support this. Therefore if this method returns null it does not mean that there are no changed properties. However if an empty set is returned, it can safely be assumed that there are none. Therefore returning {code null} is the equivalent of "don't know".

Returns:

The set of changed property names. For external events or resource provider events null is returned.

getAddedPropertyNames

@Deprecated
 @CheckForNull
public java.util.Set<java.lang.String> getAddedPropertyNames()

Deprecated. As there is no guarantee that this information is contained in the change event, this should not be used anymore.

Optional information about added properties. The application code can not rely on getting the correct set of added properties. A resource provider implementation is free to not support this. Therefore if this method returns null it does not mean that there are no added properties. However if an empty set is returned, it can safely be assumed that there are none. Therefore returning {code null} is the equivalent of "don't know".

Returns:

The set of changed property names. For external events or resource provider events null is returned.

getRemovedPropertyNames

@Deprecated
 @CheckForNull
public java.util.Set<java.lang.String> getRemovedPropertyNames()

Deprecated. As there is no guarantee that this information is contained in the change event, this should not be used anymore.

Optional information about removed properties. The application code can not rely on getting the correct set of removed properties. A resource provider implementation is free to not support this. Therefore if this method returns null it does not mean that there are no removed properties. However if an empty set is returned, it can safely be assumed that there are none. Therefore returning {code null} is the equivalent of "don't know".

Returns:

The set of changed property names. For external events or resource provider events null is returned.

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object