Page Comparison

Declarative - set up in Workflow Rules

• Don’t have an option for when Workflow Rules are discontinued (if ever)

Asynchronous

Fire and Forget

SOAP based (see https://tddprojects.atlassian.net/wiki/pages/createpage.action?spaceKey=SF&title=SOAP%20vs%20REST&linkCreation=true&fromPageId=1310556236 ) uses the WSDL and sends in XML

Only work on one object.

Can send the Session ID plus any fields on the Object.

It sends the Org ID also

After 24 hours messages are dropped from the queue

No set order. If they fail, messages may be retried out of order.

Has a unique Notification ID

default retry up to 24 hours 30s, 1m, 2m, 4m etc up to 2 hours, then each 2 hours for 24 hours

Message may be delivered more than once.

A listener is implemented on the external system.

Listener sends back an acknowledgement.

Use the session ID to call back to Salesforce

1 Message can contain 100 notifications