Other Protocols

A delegate that must be provided when opening a change stream for full events. The methods called by this delegate will be called whenever the stream receives an event or encounters an error. To implement a class conforming to this protocol, be sure to add a typealias for the type of BSON documents that the delegate will react to. In most cases, this will be Document, but if you have specified your own Codable type, specify it instead.

 public class MyNormalDelegate: ChangeStreamDelegate {
     typealias DocumentT = Document

     public func didReceive(event: ChangeEvent<Document>) {
         // react to events
     }

     // ...other method implementations
 }

 public class MyCustomDelegate: ChangeStreamDelegate {
     typealias DocumentT = MyCustomType

     public func didReceive(event: ChangeEvent<MyCustomType>) {
         // react to events
     }

     // ...other method implementations
 }

A delegate that must be provided when opening a change stream for compact events. The methods called by this delegate will be called whenever the stream receives an event or encounters an error. To implement a class conforming to this protocol, be sure to add a typealias for the type of BSON documents that the delegate will react to. In most cases, this will be Document, but if you have specified your own Codable type, specify it instead.

 public class MyNormalDelegate: CompactChangeStreamDelegate {
     typealias DocumentT = Document

     public func didReceive(event: CompactChangeEvent<Document>) {
         // react to events
     }

     // ...other method implementations
 }

 public class MyCustomDelegate: CompactChangeStreamDelegate {
     typealias DocumentT = MyCustomType

     public func didReceive(event: CompactChangeEvent<MyCustomType>) {
         // react to events
     }

     // ...other method implementations
 }