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=== Execution Publishing

The xref:refguide:applib:index/annotation/Property.adoc#executionPublishing[executionPublishing()] element determines whether and how a property edit is published via the registered implementation of xref:refguide:applib:index/services/publishing/spi/ExecutionSubscriber.adoc[ExecutionSubscriber].

A common use case is to notify external "downstream" systems of changes in the state of the Apache Isis application.

The xref:refguide:config:sections/isis.applib.adoc#isis.applib.annotation.property.execution-publishing[isis.applib.annotation.property.execution-publishing] configuration property is used to determine the whether the property edits are published:

* `all`
+
all property edits are published

* `none`
+
no property edits are published

If there is no configuration property in `application.properties` then publishing is automatically enabled.

This default can be overridden on an property-by-property basis; if `executionPublishing()` is set to `ENABLED` then the property edit is published irrespective of the configured value; if set to `DISABLED` then the property edit is _not_ published, again irrespective of the configured value.

For example:

[source,java]
----
import lombok.Getter;
import lombok.Setter;

public class Order {

    @Property(executionPublishing=Publishing.ENABLED)    // <.>
    @Getter @Setter
    private int quantity;

    // ...
}
----

<.> because set to enabled, will be published irrespective of the configured value.


