Periodic message sent by the Mesos master according to 'Subscribed.heartbeat_interval_seconds'.

* Scheduler call API.

Accepts an offer, performing the specified operations in a sequential manner.

Acknowledges the receipt of status update.

Declines an offer, signaling the master to potentially reoffer the resources to a different framework.

Kills a specific task.

Sends arbitrary binary data to the executor.

Allows the scheduler to query the status for non-terminal tasks.

TODO(vinod): Support arbitrary queries than just state of tasks.

Requests a specific set of resources from Mesos's allocator.

Shuts down a custom executor.

Subscribes the scheduler with the master to receive events.

* Scheduler event API.

Received when an invalid framework (e.g., unauthenticated, unauthorized) attempts to subscribe with the master.

Received when a slave is removed from the cluster (e.g., failed health checks) or when an executor is terminated.

Received when a custom message generated by the executor is forwarded by the master.

Received whenever there are new resources that are offered to the scheduler or resources requested back from the scheduler.

Received when a particular offer is no longer valid (e.g., the slave corresponding to the offer has been removed) and hence needs to be rescinded.

First event received when the scheduler subscribes.

Received whenever there is a status update that is generated by the executor or slave or master.

Possible call types, followed by message definitions if applicable.

Possible event types, followed by message definitions if applicable.