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calls.go
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calls.go
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package calls
import (
"errors"
"math/rand"
"time"
"github.com/mesos/mesos-go/api/v1/lib"
"github.com/mesos/mesos-go/api/v1/lib/scheduler"
)
// Filters sets a scheduler.Call's internal Filters, required for Accept and Decline calls.
func Filters(fo ...mesos.FilterOpt) scheduler.CallOpt {
return func(c *scheduler.Call) {
switch c.Type {
case scheduler.Call_ACCEPT:
c.Accept.Filters = mesos.OptionalFilters(fo...)
case scheduler.Call_ACCEPT_INVERSE_OFFERS:
c.AcceptInverseOffers.Filters = mesos.OptionalFilters(fo...)
case scheduler.Call_DECLINE:
c.Decline.Filters = mesos.OptionalFilters(fo...)
case scheduler.Call_DECLINE_INVERSE_OFFERS:
c.DeclineInverseOffers.Filters = mesos.OptionalFilters(fo...)
default:
panic("filters not supported for type " + c.Type.String())
}
}
}
// RefuseSecondsWithJitter returns a calls.Filters option that sets RefuseSeconds to a random number
// of seconds between 0 and the given duration.
func RefuseSecondsWithJitter(r *rand.Rand, d time.Duration) scheduler.CallOpt {
return Filters(func(f *mesos.Filters) {
s := time.Duration(r.Int63n(int64(d))).Seconds()
f.RefuseSeconds = &s
})
}
// RefuseSeconds returns a calls.Filters option that sets RefuseSeconds to the given duration
func RefuseSeconds(d time.Duration) scheduler.CallOpt {
asFloat := d.Seconds()
return Filters(func(f *mesos.Filters) {
f.RefuseSeconds = &asFloat
})
}
// Framework sets a scheduler.Call's FrameworkID
func Framework(id string) scheduler.CallOpt {
return func(c *scheduler.Call) {
c.FrameworkID = &mesos.FrameworkID{Value: id}
}
}
// Subscribe returns a subscribe call with the given parameters.
// The call's FrameworkID is automatically filled in from the info specification.
func Subscribe(info *mesos.FrameworkInfo) *scheduler.Call {
return &scheduler.Call{
Type: scheduler.Call_SUBSCRIBE,
FrameworkID: info.GetID(),
Subscribe: &scheduler.Call_Subscribe{FrameworkInfo: info},
}
}
// SubscribeTo returns an option that configures a SUBSCRIBE call w/ a framework ID.
// If frameworkID is "" then the SUBSCRIBE call is cleared of all framework ID references.
// Panics if the call does not contain a non-nil Subscribe reference.
func SubscribeTo(frameworkID string) scheduler.CallOpt {
return func(call *scheduler.Call) {
if call.Subscribe == nil {
panic("illegal call option: Call.Subscribe was unexpectedly nil")
}
var frameworkProto *mesos.FrameworkID
if frameworkID != "" {
frameworkProto = &mesos.FrameworkID{Value: frameworkID}
}
call.Subscribe.FrameworkInfo.ID = frameworkProto
call.FrameworkID = frameworkProto
}
}
type acceptBuilder struct {
offerIDs map[mesos.OfferID]struct{}
operations []mesos.Offer_Operation
}
type AcceptOpt func(*acceptBuilder)
type OfferOperations []mesos.Offer_Operation
// WithOffers allows a client to pair some set of OfferOperations with multiple resource offers.
// Example: calls.Accept(calls.OfferOperations{calls.OpLaunch(tasks...)}.WithOffers(offers...))
func (ob OfferOperations) WithOffers(ids ...mesos.OfferID) AcceptOpt {
return func(ab *acceptBuilder) {
for i := range ids {
ab.offerIDs[ids[i]] = struct{}{}
}
ab.operations = append(ab.operations, ob...)
}
}
// Accept returns an accept call with the given parameters.
// Callers are expected to fill in the FrameworkID and Filters.
func Accept(ops ...AcceptOpt) *scheduler.Call {
ab := &acceptBuilder{
offerIDs: make(map[mesos.OfferID]struct{}, len(ops)),
}
for _, op := range ops {
op(ab)
}
offerIDs := make([]mesos.OfferID, 0, len(ab.offerIDs))
for id := range ab.offerIDs {
offerIDs = append(offerIDs, id)
}
return &scheduler.Call{
Type: scheduler.Call_ACCEPT,
Accept: &scheduler.Call_Accept{
OfferIDs: offerIDs,
Operations: ab.operations,
},
}
}
// AcceptInverseOffers returns an accept-inverse-offers call for the given offer IDs.
// Callers are expected to fill in the FrameworkID and Filters.
func AcceptInverseOffers(offerIDs ...mesos.OfferID) *scheduler.Call {
return &scheduler.Call{
Type: scheduler.Call_ACCEPT_INVERSE_OFFERS,
AcceptInverseOffers: &scheduler.Call_AcceptInverseOffers{
InverseOfferIDs: offerIDs,
},
}
}
// DeclineInverseOffers returns a decline-inverse-offers call for the given offer IDs.
// Callers are expected to fill in the FrameworkID and Filters.
func DeclineInverseOffers(offerIDs ...mesos.OfferID) *scheduler.Call {
return &scheduler.Call{
Type: scheduler.Call_DECLINE_INVERSE_OFFERS,
DeclineInverseOffers: &scheduler.Call_DeclineInverseOffers{
InverseOfferIDs: offerIDs,
},
}
}
// OpLaunch returns a launch operation builder for the given tasks
func OpLaunch(ti ...mesos.TaskInfo) mesos.Offer_Operation {
return mesos.Offer_Operation{
Type: mesos.Offer_Operation_LAUNCH,
Launch: &mesos.Offer_Operation_Launch{
TaskInfos: ti,
},
}
}
func OpLaunchGroup(ei mesos.ExecutorInfo, ti ...mesos.TaskInfo) mesos.Offer_Operation {
return mesos.Offer_Operation{
Type: mesos.Offer_Operation_LAUNCH_GROUP,
LaunchGroup: &mesos.Offer_Operation_LaunchGroup{
Executor: ei,
TaskGroup: mesos.TaskGroupInfo{
Tasks: ti,
},
},
}
}
func OpReserve(rs ...mesos.Resource) mesos.Offer_Operation {
return mesos.Offer_Operation{
Type: mesos.Offer_Operation_RESERVE,
Reserve: &mesos.Offer_Operation_Reserve{
Resources: rs,
},
}
}
func OpUnreserve(rs ...mesos.Resource) mesos.Offer_Operation {
return mesos.Offer_Operation{
Type: mesos.Offer_Operation_UNRESERVE,
Unreserve: &mesos.Offer_Operation_Unreserve{
Resources: rs,
},
}
}
func OpCreate(rs ...mesos.Resource) mesos.Offer_Operation {
return mesos.Offer_Operation{
Type: mesos.Offer_Operation_CREATE,
Create: &mesos.Offer_Operation_Create{
Volumes: rs,
},
}
}
func OpDestroy(rs ...mesos.Resource) mesos.Offer_Operation {
return mesos.Offer_Operation{
Type: mesos.Offer_Operation_DESTROY,
Destroy: &mesos.Offer_Operation_Destroy{
Volumes: rs,
},
}
}
// Role decorates Revive and Suppress calls; panics for any other call type.
func Role(role string) scheduler.CallOpt {
return func(c *scheduler.Call) {
if c == nil {
return
}
switch c.Type {
case scheduler.Call_REVIVE:
if c.Revive == nil {
if role == "" {
return
}
c.Revive = new(scheduler.Call_Revive)
}
if role == "" {
c.Revive.Role = nil
} else {
c.Revive.Role = &role
}
case scheduler.Call_SUPPRESS:
if c.Suppress == nil {
if role == "" {
return
}
c.Suppress = new(scheduler.Call_Suppress)
}
if role == "" {
c.Suppress.Role = nil
} else {
c.Suppress.Role = &role
}
default:
panic("Role doesn't support call type " + c.Type.String())
}
}
}
// Revive returns a revive call.
// Callers are expected to fill in the FrameworkID.
func Revive() *scheduler.Call {
return &scheduler.Call{
Type: scheduler.Call_REVIVE,
}
}
// Suppress returns a suppress call.
// Callers are expected to fill in the FrameworkID.
func Suppress() *scheduler.Call {
return &scheduler.Call{
Type: scheduler.Call_SUPPRESS,
}
}
// Decline returns a decline call with the given parameters.
// Callers are expected to fill in the FrameworkID and Filters.
func Decline(offerIDs ...mesos.OfferID) *scheduler.Call {
return &scheduler.Call{
Type: scheduler.Call_DECLINE,
Decline: &scheduler.Call_Decline{
OfferIDs: offerIDs,
},
}
}
// Kill returns a kill call with the given parameters.
// Callers are expected to fill in the FrameworkID.
func Kill(taskID, agentID string) *scheduler.Call {
return &scheduler.Call{
Type: scheduler.Call_KILL,
Kill: &scheduler.Call_Kill{
TaskID: mesos.TaskID{Value: taskID},
AgentID: optionalAgentID(agentID),
},
}
}
// Shutdown returns a shutdown call with the given parameters.
// Callers are expected to fill in the FrameworkID.
func Shutdown(executorID, agentID string) *scheduler.Call {
return &scheduler.Call{
Type: scheduler.Call_SHUTDOWN,
Shutdown: &scheduler.Call_Shutdown{
ExecutorID: mesos.ExecutorID{Value: executorID},
AgentID: mesos.AgentID{Value: agentID},
},
}
}
// Acknowledge returns an acknowledge call with the given parameters.
// Callers are expected to fill in the FrameworkID.
func Acknowledge(agentID, taskID string, uuid []byte) *scheduler.Call {
return &scheduler.Call{
Type: scheduler.Call_ACKNOWLEDGE,
Acknowledge: &scheduler.Call_Acknowledge{
AgentID: mesos.AgentID{Value: agentID},
TaskID: mesos.TaskID{Value: taskID},
UUID: uuid,
},
}
}
// ReconcileTasks constructs a []Call_Reconcile_Task from the given mappings:
// map[string]string{taskID:agentID}
// Map keys (taskID's) are required to be non-empty, but values (agentID's) *may* be empty.
func ReconcileTasks(tasks map[string]string) scheduler.ReconcileOpt {
return func(cr *scheduler.Call_Reconcile) {
if len(tasks) == 0 {
cr.Tasks = nil
return
}
result := make([]scheduler.Call_Reconcile_Task, len(tasks))
i := 0
for k, v := range tasks {
result[i].TaskID = mesos.TaskID{Value: k}
result[i].AgentID = optionalAgentID(v)
i++
}
cr.Tasks = result
}
}
// Reconcile returns a reconcile call with the given parameters.
// See ReconcileTask.
// Callers are expected to fill in the FrameworkID.
func Reconcile(opts ...scheduler.ReconcileOpt) *scheduler.Call {
return &scheduler.Call{
Type: scheduler.Call_RECONCILE,
Reconcile: (&scheduler.Call_Reconcile{}).With(opts...),
}
}
// Message returns a message call with the given parameters.
// Callers are expected to fill in the FrameworkID.
func Message(agentID, executorID string, data []byte) *scheduler.Call {
return &scheduler.Call{
Type: scheduler.Call_MESSAGE,
Message: &scheduler.Call_Message{
AgentID: mesos.AgentID{Value: agentID},
ExecutorID: mesos.ExecutorID{Value: executorID},
Data: data,
},
}
}
// Request returns a resource request call with the given parameters.
// Callers are expected to fill in the FrameworkID.
func Request(requests ...mesos.Request) *scheduler.Call {
return &scheduler.Call{
Type: scheduler.Call_REQUEST,
Request: &scheduler.Call_Request{
Requests: requests,
},
}
}
func optionalAgentID(agentID string) *mesos.AgentID {
if agentID == "" {
return nil
}
return &mesos.AgentID{Value: agentID}
}
func errInvalidCall(reason string) error {
return errors.New("invalid call: " + reason)
}