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job.go
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job.go
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/*
http://www.apache.org/licenses/LICENSE-2.0.txt
Copyright 2015-2016 Intel Corporation
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package scheduler
import (
"sync"
"time"
log "github.com/Sirupsen/logrus"
"github.com/intelsdi-x/snap/core"
"github.com/intelsdi-x/snap/core/cdata"
"github.com/intelsdi-x/snap/core/ctypes"
. "github.com/intelsdi-x/snap/pkg/promise"
)
const (
collectJobType jobType = iota
publishJobType
processJobType
)
const (
defaultDeadline = time.Duration(5 * time.Second)
)
// Represents a queued job, together with a synchronization
// barrier to signal job completion (successful or otherwise).
//
// Functions that operate on this type (IsComplete, Complete,
// Await) are idempotent and thread-safe.
type queuedJob interface {
Job() job
Promise() Promise
}
type qj struct {
job job
promise Promise
}
func newQueuedJob(job job) queuedJob {
return &qj{
job: job,
promise: NewPromise(),
}
}
// Returns the underlying job.
func (j *qj) Job() job {
return j.job
}
// Returns the underlying promise.
func (j *qj) Promise() Promise {
return j.promise
}
// Primary type for job inside
// the scheduler. Job encompasses all
// all job types -- collect, process, and publish.
type job interface {
AddErrors(errs ...error)
Errors() []error
StartTime() time.Time
Deadline() time.Time
Name() string
Version() int
Type() jobType
TypeString() string
TaskID() string
Run()
Metrics() []core.Metric
}
type jobType int
type coreJob struct {
sync.Mutex
name string
version int
taskID string
jtype jobType
deadline time.Time
starttime time.Time
errors []error
}
func newCoreJob(t jobType, deadline time.Time, taskID string, name string, version int) *coreJob {
return &coreJob{
jtype: t,
name: name,
version: version,
deadline: deadline,
taskID: taskID,
errors: make([]error, 0),
starttime: time.Now(),
}
}
func (c *coreJob) StartTime() time.Time {
return c.starttime
}
func (c *coreJob) Deadline() time.Time {
return c.deadline
}
func (c *coreJob) Name() string {
return c.name
}
func (c *coreJob) Version() int {
return c.version
}
func (c *coreJob) Type() jobType {
return c.jtype
}
func (c *coreJob) TypeString() string {
switch c.jtype {
case collectJobType:
return "collector"
case processJobType:
return "processor"
case publishJobType:
return "publisher"
}
return "unknown"
}
func (c *coreJob) AddErrors(errs ...error) {
c.Lock()
defer c.Unlock()
c.errors = append(c.errors, errs...)
}
func (c *coreJob) Errors() []error {
return c.errors
}
func (c *coreJob) TaskID() string {
return c.taskID
}
type collectorJob struct {
*coreJob
collector collectsMetrics
metricTypes []core.RequestedMetric
metrics []core.Metric
configDataTree *cdata.ConfigDataTree
tags map[string]map[string]string
}
func newCollectorJob(
metricTypes []core.RequestedMetric,
deadlineDuration time.Duration,
collector collectsMetrics,
cdt *cdata.ConfigDataTree,
taskID string,
tags map[string]map[string]string,
) job {
return &collectorJob{
collector: collector,
metricTypes: metricTypes,
metrics: []core.Metric{},
coreJob: newCoreJob(collectJobType, time.Now().Add(deadlineDuration), taskID, "", 0),
configDataTree: cdt,
tags: tags,
}
}
type metric struct {
namespace core.Namespace
version int
config *cdata.ConfigDataNode
}
func (m *metric) Namespace() core.Namespace {
return m.namespace
}
func (m *metric) Config() *cdata.ConfigDataNode {
return m.config
}
func (m *metric) Version() int {
return m.version
}
func (m *metric) Data() interface{} { return nil }
func (m *metric) Description() string { return "" }
func (m *metric) Unit() string { return "" }
func (m *metric) Tags() map[string]string { return nil }
func (m *metric) LastAdvertisedTime() time.Time { return time.Unix(0, 0) }
func (m *metric) Timestamp() time.Time { return time.Unix(0, 0) }
func (c *collectorJob) Metrics() []core.Metric {
return c.metrics
}
func (c *collectorJob) Run() {
log.WithFields(log.Fields{
"_module": "scheduler-job",
"block": "run",
"job-type": "collector",
"metric-count": len(c.metricTypes),
}).Debug("starting collector job")
for ns, tags := range c.tags {
for k, v := range tags {
log.WithFields(log.Fields{
"_module": "scheduler-job",
"block": "run",
"job-type": "collector",
"ns": ns,
"tag-key": k,
"tag-val": v,
}).Debug("Tags sent to collectorJob")
}
}
ret, errs := c.collector.CollectMetrics(c.TaskID(), c.tags)
log.WithFields(log.Fields{
"_module": "scheduler-job",
"block": "run",
"job-type": "collector",
"metric-count": len(ret),
}).Debug("collector run completed")
c.metrics = ret
if errs != nil {
for _, e := range errs {
log.WithFields(log.Fields{
"_module": "scheduler-job",
"block": "run",
"job-type": "collector",
"error": e,
}).Error("collector run error")
}
c.AddErrors(errs...)
}
}
type processJob struct {
*coreJob
processor processesMetrics
parentJob job
metrics []core.Metric
config map[string]ctypes.ConfigValue
}
func (pr *processJob) Metrics() []core.Metric {
return pr.metrics
}
func newProcessJob(parentJob job, pluginName string, pluginVersion int, contentType string, config map[string]ctypes.ConfigValue, processor processesMetrics, taskID string) job {
return &processJob{
parentJob: parentJob,
metrics: []core.Metric{},
coreJob: newCoreJob(processJobType, parentJob.Deadline(), taskID, pluginName, pluginVersion),
config: config,
processor: processor,
}
}
func (p *processJob) Run() {
log.WithFields(log.Fields{
"_module": "scheduler-job",
"block": "run",
"job-type": "processor",
"plugin-name": p.name,
"plugin-version": p.version,
"plugin-config": p.config,
}).Debug("starting processor job")
mts, errs := p.processor.ProcessMetrics(p.parentJob.Metrics(), p.config, p.taskID, p.name, p.version)
if errs != nil {
for _, e := range errs {
log.WithFields(log.Fields{
"_module": "scheduler-job",
"block": "run",
"job-type": "processor",
"plugin-name": p.name,
"plugin-version": p.version,
"plugin-config": p.config,
"error": e.Error(),
}).Error("error with processor job")
}
p.AddErrors(errs...)
}
p.metrics = mts
}
type publisherJob struct {
*coreJob
parentJob job
publisher publishesMetrics
config map[string]ctypes.ConfigValue
}
func (pu *publisherJob) Metrics() []core.Metric {
return []core.Metric{}
}
func newPublishJob(parentJob job, pluginName string, pluginVersion int, contentType string, config map[string]ctypes.ConfigValue, publisher publishesMetrics, taskID string) job {
return &publisherJob{
parentJob: parentJob,
publisher: publisher,
coreJob: newCoreJob(publishJobType, parentJob.Deadline(), taskID, pluginName, pluginVersion),
config: config,
}
}
func (p *publisherJob) Run() {
log.WithFields(log.Fields{
"_module": "scheduler-job",
"block": "run",
"job-type": "publisher",
"plugin-name": p.name,
"plugin-version": p.version,
"plugin-config": p.config,
}).Debug("starting publisher job")
errs := p.publisher.PublishMetrics(p.parentJob.Metrics(), p.config, p.taskID, p.name, p.version)
if errs != nil {
for _, e := range errs {
log.WithFields(log.Fields{
"_module": "scheduler-job",
"block": "run",
"job-type": "publisher",
"plugin-name": p.name,
"plugin-version": p.version,
"plugin-config": p.config,
"error": e.Error(),
}).Error("error with publisher job")
}
p.AddErrors(errs...)
}
}