Guide: Rédiger une règle CEP
Exemple fil rouge: SI la hauteur d'eau dépasse 3m ALORS je créée une instance de risque émergeant appelé "Inondation"
Nom de la règle: tns:WaterLevelRule
Evénements d'entrée: Event_WaterStationMeasures associé au topic: WaterStationTopic accessible à l'adresse: ${eventProducerSimulatorBroker}
Condition: waterLevel > 3.0
Si condition vérifiée à l'arrivée d'un événement:
Action Emerging Risk créé comme nouveau noeud du modèle dans un espace de connaissance et une collaboration donnés (ici en cours)
nom du risque: Flooding risk at Orléans
emplacement du risque sur le modèle: '110' as node__position__x, '110' as node__position__y, '61' as node__dimension__width, '61' as node__dimension__height,
image du risque: '/##application_name##/webjars/gind/ioda/crisis_objectives/images/model/nodes/objectives/geoLoc/emergingRisk.png'
longitude associée au risque: stationLong
latitude associée au risque: stationLat
altitude associée au risque: 0.0
- XML obtenu avec l'exemple présenté
<tns:cepRule xmlns:tns="http://www.gind.emac.fr/data/CepRules" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<tns:ruleName>tns:WaterLevelRule</tns:ruleName>
<tns:streamDefinition>
<![CDATA[
define stream Event_WaterStationMeasures (id string, cityName string, stationName string, stationLat float, stationLong float, waterLevel float, waterFlow float);
]]>
</tns:streamDefinition>
<tns:rule>
<![CDATA[
from Event_WaterStationMeasures[waterLevel > 3.0]
select '${collaborationName}' as collaborationName, '${knowledgeSpaceName}' as knowledgeSpaceName,
'{http://fr.emac.gind/crisis_objectives}Emerging Risk' as node__type,
'name' as node__property0__name, str:concat('Flooding Risk at ', stationName) as node__property0__value,
'similar concepts' as node__property1__name, '' as node__property1__value,
'Impacted components' as node__property2__name, '' as node__property2__value,
'similar concept of objective created' as node__property3__name, '' as node__property3__value,
'opportunity_threaten' as node__role0,
'emerging_risk' as node__role1,
'110' as node__position__x,
'110' as node__position__y,
'61' as node__dimension__width,
'61' as node__dimension__height,
'/##application_name##/webjars/gind/ioda/crisis_objectives/images/model/nodes/objectives/geoLoc/emergingRisk.png' as node__geoLocalisation__point__image,
stationLong as node__geoLocalisation__point__longitude,
stationLat as node__geoLocalisation__point__latitude,
'0.0' as node__geoLocalisation__point__altitude
insert into addNodeEvent;
]]>
</tns:rule>
<tns:eventAction>
<tns:eventElementName xmlns:ns12="http://www.emac.gind.fr/EventType">ns12:addNodeEvent</tns:eventElementName>
<tns:schemaDefinition>
<tns:url>classpath://event/EventType.xsd</tns:url>
</tns:schemaDefinition>
<tns:topic xmlns:s="http://www.emac.gind.fr/EventType">s:addNodeTopic</tns:topic>
</tns:eventAction>
<tns:context>
<tns:subscriptionsRequired>
<tns:entry>
<tns:topic xmlns:ns12="http://www.mines-albi.fr/loireFloodingTopic">ns12:WaterStationTopic</tns:topic>
<tns:correspondingEvent xmlns:ns12="http://www.mines-albi.fr/loireFloodingEvent">ns12:Event_WaterStationMeasures</tns:correspondingEvent>
<tns:endpointAddressToSubscribe>${eventProducerSimulatorBroker}</tns:endpointAddressToSubscribe>
</tns:entry>
</tns:subscriptionsRequired>
</tns:context>
</tns:cepRule>
Extensions internes
| type | name | description | args | comment |
|---|---|---|---|---|
| cypher | CypherQuery | ?? | arg0 = query, | overrides process method |
| model | CountNodes | Gives the numbers of nodes of a model | arg0 = model | |
| model | FindNodeByProperty | Finds first node containing a given property value | arg0 = model, arg1 = propertyName, arg2 = propertyValue | first? |
| model | FormatModelInJSON | Serializes the model in JSON | arg0 = model, arg1 = type, arg2 = template | |
| model | GetId | Gets the id of a given node/edge | arg0 = BO (node or edge) | Big hazardous cast in BO |
| node | FindValuePropertyOnNode | Gives the value of a given property from a given node | arg0 = node, arg1 = propertyName | hazardous cast + missing index out of bounds check |
| node | GetOnNode | Gives the value of a given field from a given node | arg0 = node, arg1 = fieldName | oh ... my ... god |
| util | Get | Gives the value of a given field from a given generic object | arg0 = object, arg1 = fieldName | redundant? |
| util | RandBound | Gives a given number (int or double) | arg0 = min, arg1 = max, arg2 = type (int | double) | |
| util | String | Returns the String value of an object | arg0 = the object | |