Condition Classes

It is possible to define any number and type of new condition classes with specialized configurations. Rierino is shipped with a number of default classes.

ElementValueCondition

This class(com.rierino.handler.saga.condition.ElementValueCondition) returns the value of a specific payload element to be used as a condition value.

Parameter	Definition	Example
element	Json path of the element to use	parameters.language

ErrorCodeCondition

This class(com.rierino.handler.saga.condition.ErrorCodeCondition) returns the value of event error code (or '-' if null) to be used as a condition value.

ErrorHttpCondition

This class(com.rierino.handler.saga.condition.ErrorHttpCondition) returns the http status code of event error (or '-' if null) to be used as a condition value.

EventStatusCondition

This class(com.rierino.handler.saga.condition.EventStatusCondition) returns the status name of event result (or '-' if null) to be used as a condition value.

HasElementCondition

This class(com.rierino.handler.saga.condition.HasElementCondition) returns "true" or "false" based on whether a specific payload element exists or not.

Parameter	Definition	Example
element	Json path of the element to use	customer.id

JMESCondition

This class(com.rierino.handler.saga.condition.JMESCondition) returns a text value based on evaluation of a JMESPath pattern.

Parameter	Definition	Example
pattern	JMESPath pattern to apply	language=='enUS'
patternElement	Json path to payload element which defines JMESPath pattern to apply	parameters.condition
store	Whether JMESPath expression should be cached for future executions (defaults to true)	false
inputElement	Json path of the payload to run pattern on	parameters

JMESPath — JMESPathjmespath.org

JMESPath Page

JsonSchemaCondition

This class(com.rierino.handler.saga.condition.JsonSchemaCondition) evaluates event payload against a Json schema constraints and returns "success" or "fail".

Parameter	Definition	Example
schema	String representation of Json schema	{"type":"string"}

JSON Schemajson-schema.org

Json Schema Page

RegexCondition

This class(com.rierino.handler.saga.condition.RegexCondition) evaluates event payload against a regex expression and returns "true" or "false".

Parameter	Definition	Example
element	Json path of the element to evaluate	customer.data.name
regex	Regex expression to evaluate	[a-zA-Z]+

SuccessCondition

This class(com.rierino.handler.saga.condition.SuccessCondition) returns "success" or "fail" based on whether the previous saga step had an error or not.