| Class | Description | 
|---|---|
| ContainerPlacementMessage | Encapsulates the request or response payload information between the ContainerPlacementService and external
 controllers issuing placement actions | 
| ContainerPlacementRequestMessage | Encapsulates the request sent from the external controller to the JobCoordinator to take a container placement action | 
| ContainerPlacementResponseMessage | Encapsulates the value for the response sent from the JobCoordinator for a container placement action | 
| Enum | Description | 
|---|---|
| ContainerPlacementMessage.StatusCode |