Scheduler now has a first fit algorithm based on memory, cpu, and watts. Watts need to be set by the user but should be calculated through heuristics. Framework now also works by having a set of tasks and launching them.

states.go

@@ -0,0 +1,41 @@
+package main
+
+import (
+	mesos "github.com/mesos/mesos-go/mesosproto"
+)
+
+// NameFor returns the string name for a TaskState.
+func NameFor(state *mesos.TaskState) string {
+	switch *state {
+	case mesos.TaskState_TASK_STAGING:
+		return "TASK_STAGING"
+	case mesos.TaskState_TASK_STARTING:
+		return "TASK_STARTING"
+	case mesos.TaskState_TASK_RUNNING:
+		return "TASK_RUNNING"
+	case mesos.TaskState_TASK_FINISHED:
+		return "TASK_FINISHED" // TERMINAL
+	case mesos.TaskState_TASK_FAILED:
+		return "TASK_FAILED" // TERMINAL
+	case mesos.TaskState_TASK_KILLED:
+		return "TASK_KILLED" // TERMINAL
+	case mesos.TaskState_TASK_LOST:
+		return "TASK_LOST" // TERMINAL
+	default:
+		return "UNKNOWN"
+	}
+}
+
+// IsTerminal determines if a TaskState is a terminal state, i.e. if it singals
+// that the task has stopped running.
+func IsTerminal(state *mesos.TaskState) bool {
+	switch *state {
+	case mesos.TaskState_TASK_FINISHED,
+		mesos.TaskState_TASK_FAILED,
+		mesos.TaskState_TASK_KILLED,
+		mesos.TaskState_TASK_LOST:
+		return true
+	default:
+		return false
+	}
+}