How To ensure exclusive message transfers with SAP Cloud Integration – integration://excellence

Situation: You want to make sure that only one instance of an integration flow is active at the same time (exclusivity). Any additional (incoming) message shall be refused (be it triggered by a sender or by a timer event)

Solution: Use the Datastore to make sure your iflow is executed only once at the same time:

Use a Local Integration Process to only catch errors of writing if entry already exists

Make sure “Overwrite Existing Message” is unchecked

Return the error to sender in case of error

Set a custom status because the main status is set to COMPLETED

import com.sap.gateway.ip.core.customdev.util.Message;
import java.util.HashMap;

def Message processData(Message message) {
	def messageLog = messageLogFactory.getMessageLog(message);
	def error = message.getHeaders().get("Error");       
        if(messageLog != null){
                messageLog.addCustomHeaderProperty("Error", error);   
        }
        return message;
}

Delete the entry from the Datastore after processing, e.g. by using a Sequential Multicast

Monitoring