The Publish Event mediator constructs events and publishes them to different systems such as BAM and CEP. This is done via event sinks.
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The Publish Event mediator is a content-aware mediator. |
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Syntax
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<publishEvent> <eventSink>String</eventSink> <streamName>String</streamName> <streamVersion>String</streamVersion> <attributes> <meta> <attribute name="string" type="dataType" default="" (value="literal" | expression="[XPath") /> </meta> <correlation> <attribute name="string" type="dataType" default="" (value="literal" | expression="[XPath") /> </correlation> <payload> <attribute name="string" type="dataType" default="" (value="literal" | expression="[XPath") /> </payload> <arbitrary> <attribute name="string" type="dataType" default="" value="literal" /> </arbitrary> </attributes> </publishEvent> |
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UI Configuration
Parameters that can be configured for the Publish Event mediator are as follows.
| Parameter Name | Description |
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| Stream Name | The name of the stream to be used for sending data. |
| Stream Version | The version of the stream to be used for sending data. |
| EventSink | The name of the event sink to which the events should be published. |
You can add the following four types of attributes to a Publish Event mediator configuration.
Meta Attributes: The list of attributes which are included in the Meta section of the event.
Correlated Attributes: The list of attributes that are included in the Correlated section of the event.
Payload Attributes: The list of attributes that are included in the Payload section of the event.
Arbitrary Attributes: The list of attributes that are included in the Arbitrary section of the event.
The parameters that are available to configure an individual attribute are as follows.
| Parameter Name | Description |
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| Attribute Name | The name of the attribute. |
| Attribute Value | This parameter specifies whether the value of the attribute should be a static value or an expression.
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| Value/Expression | The value of the attribute. You can enter a static value, or an expression to evaluate the value depending on the selection made in the Attribute Value parameter. |
| Type | The data type of the attribute. |
| Action | Click Delete in the relevant row to delete an attribute. |
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Example
In this configuration, the Publish Event mediator uses four attributes to extract information from the ESB. This information is published in an event sink in the ESB named sample_event_sink.
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<publishEvent>
<eventSink>sample_event_sink</eventSink>
<streamName>stream_88</streamName>
<streamVersion>1.1.2</streamVersion>
<attributes>
<meta>
<attribute name="http_method"
type="STRING"
defaultValue=""
expression="get-property('axis2', 'HTTP_METHOD')"/>
<attribute name="destination"
type="STRING"
defaultValue=""
expression="get-property('To')"/>
</meta>
<correlation>
<attribute name="date"
type="STRING"
defaultValue=""
expression="get-property('SYSTEM_DATE')"/>
</correlation>
<payload>
<attribute xmlns:m0="http://services.samples"
name="symbol"
type="STRING"
defaultValue=""
expression="$body/m0:getQuote/m0:request/m0:symbol"/>
</payload>
</attributes>
</publishEvent> |