Golang WorkSpecMeta.Continuous方法代码示例

// TestMetaContinuous specifically checks that you cannot enable the
// "continuous" flag on non-continuous work specs.
func (s *Suite) TestMetaContinuous(c *check.C) {
	var (
		err  error
		spec coordinate.WorkSpec
		meta coordinate.WorkSpecMeta
	)

	// ...also...
	spec, err = s.Namespace.SetWorkSpec(map[string]interface{}{
		"name":   "spec",
		"min_gb": 1,
	})
	c.Assert(err, check.IsNil)

	meta, err = spec.Meta(false)
	c.Assert(err, check.IsNil)
	c.Check(meta.Continuous, check.Equals, false)
	c.Check(meta.CanBeContinuous, check.Equals, false)

	meta.Continuous = true
	err = spec.SetMeta(meta)
	c.Assert(err, check.IsNil)

	meta, err = spec.Meta(false)
	c.Assert(err, check.IsNil)
	// Cannot set the "continuous" flag
	c.Check(meta.Continuous, check.Equals, false)
	c.Check(meta.CanBeContinuous, check.Equals, false)
}

// ControlWorkSpec makes changes to a work spec that are not directly
// reflected in the work spec definition.  This allows work specs to
// be paused or to stop generating new continuous jobs.
// ControlWorkSpecOptions has a complete listing of what can be done.
func (jobs *JobServer) ControlWorkSpec(workSpecName string, options map[string]interface{}) (bool, string, error) {
	var (
		cwsOptions ControlWorkSpecOptions
		decoder    *mapstructure.Decoder
		err        error
		metadata   mapstructure.Metadata
		workSpec   coordinate.WorkSpec
		wsMeta     coordinate.WorkSpecMeta
	)

	workSpec, err = jobs.Namespace.WorkSpec(workSpecName)
	if err == nil {
		// We care a lot about "false" vs. not present for
		// these things.  Manually create the decoder.
		config := mapstructure.DecoderConfig{
			Result:   &cwsOptions,
			Metadata: &metadata,
		}
		decoder, err = mapstructure.NewDecoder(&config)
	}
	if err == nil {
		err = decoder.Decode(options)
	}

	// Get the existing metadata, then change it based on what
	// we got provided
	if err == nil {
		wsMeta, err = workSpec.Meta(false)
	}
	if err == nil {
		for _, key := range metadata.Keys {
			switch key {
			case "Continuous":
				wsMeta.Continuous = cwsOptions.Continuous
			case "Status":
				wsMeta.Paused = cwsOptions.Status == Paused
			case "Weight":
				wsMeta.Weight = cwsOptions.Weight
			case "Interval":
				wsMeta.Interval = time.Duration(cwsOptions.Interval) * time.Second
			case "MaxRunning":
				wsMeta.MaxRunning = cwsOptions.MaxRunning
			}
		}
	}
	if err == nil {
		err = workSpec.SetMeta(wsMeta)
	}
	return err == nil, "", err
}

func (spec *workSpec) SetMeta(meta coordinate.WorkSpecMeta) error {
	globalLock(spec)
	defer globalUnlock(spec)

	// Preserve immutable fields (taking advantage of meta pass-by-value)
	meta.CanBeContinuous = spec.meta.CanBeContinuous
	meta.NextWorkSpecName = spec.meta.NextWorkSpecName

	// If this cannot be continuous, force-clear that flag
	if !meta.CanBeContinuous {
		meta.Continuous = false
	}

	spec.meta = meta
	return nil
}