forked from vmware-archive/atc
/
exec_engine.go
277 lines (223 loc) · 5.92 KB
/
exec_engine.go
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package engine
import (
"encoding/json"
"errors"
"strconv"
"strings"
"os"
"code.cloudfoundry.org/lager"
"github.com/concourse/atc"
"github.com/concourse/atc/db"
"github.com/concourse/atc/dbng"
"github.com/concourse/atc/exec"
"github.com/concourse/atc/worker"
"github.com/tedsuo/ifrit"
)
type execMetadata struct {
Plan atc.Plan
}
const execEngineName = "exec.v2"
type execEngine struct {
factory exec.Factory
delegateFactory BuildDelegateFactory
teamDBFactory db.TeamDBFactory
externalURL string
releaseCh chan struct{}
}
func NewExecEngine(
factory exec.Factory,
delegateFactory BuildDelegateFactory,
teamDBFactory db.TeamDBFactory,
externalURL string,
) Engine {
return &execEngine{
factory: factory,
delegateFactory: delegateFactory,
teamDBFactory: teamDBFactory,
externalURL: externalURL,
releaseCh: make(chan struct{}),
}
}
func (engine *execEngine) Name() string {
return execEngineName
}
func (engine *execEngine) CreateBuild(logger lager.Logger, build dbng.Build, plan atc.Plan) (Build, error) {
return &execBuild{
teamName: build.TeamName(),
teamID: build.TeamID(),
pipelineID: build.PipelineID(),
pipelineName: build.PipelineName(),
jobID: build.JobID(),
jobName: build.JobName(),
buildID: build.ID(),
buildName: build.Name(),
stepMetadata: buildMetadata(build, engine.externalURL),
factory: engine.factory,
delegate: engine.delegateFactory.Delegate(build),
metadata: execMetadata{
Plan: plan,
},
releaseCh: engine.releaseCh,
signals: make(chan os.Signal, 1),
}, nil
}
func (engine *execEngine) LookupBuild(logger lager.Logger, build dbng.Build) (Build, error) {
var metadata execMetadata
err := json.Unmarshal([]byte(build.EngineMetadata()), &metadata)
if err != nil {
logger.Error("invalid-metadata", err)
return nil, err
}
return &execBuild{
teamName: build.TeamName(),
teamID: build.TeamID(),
pipelineID: build.PipelineID(),
pipelineName: build.PipelineName(),
jobID: build.JobID(),
jobName: build.JobName(),
buildID: build.ID(),
buildName: build.Name(),
stepMetadata: buildMetadata(build, engine.externalURL),
factory: engine.factory,
delegate: engine.delegateFactory.Delegate(build),
metadata: metadata,
releaseCh: engine.releaseCh,
signals: make(chan os.Signal, 1),
}, nil
}
func (engine *execEngine) ReleaseAll(logger lager.Logger) {
logger.Info("calling-release-in-exec-engine")
close(engine.releaseCh)
}
func buildMetadata(build dbng.Build, externalURL string) StepMetadata {
return StepMetadata{
BuildID: build.ID(),
BuildName: build.Name(),
JobName: build.JobName(),
PipelineName: build.PipelineName(),
TeamName: build.TeamName(),
ExternalURL: externalURL,
}
}
type execBuild struct {
teamID int
teamName string
pipelineID int
pipelineName string
jobID int
jobName string
buildID int
buildName string
stepMetadata StepMetadata
factory exec.Factory
delegate BuildDelegate
signals chan os.Signal
releaseCh chan struct{}
metadata execMetadata
}
func (build *execBuild) Metadata() string {
payload, err := json.Marshal(build.metadata)
if err != nil {
panic("failed to marshal build metadata: " + err.Error())
}
return string(payload)
}
func (build *execBuild) PublicPlan(lager.Logger) (atc.PublicBuildPlan, error) {
return atc.PublicBuildPlan{
Schema: execEngineName,
Plan: build.metadata.Plan.Public(),
}, nil
}
func (build *execBuild) Abort(lager.Logger) error {
build.signals <- os.Kill
return nil
}
func (build *execBuild) Resume(logger lager.Logger) {
stepFactory := build.buildStepFactory(logger, build.metadata.Plan)
source := stepFactory.Using(&exec.NoopStep{}, worker.NewArtifactRepository())
process := ifrit.Background(source)
exited := process.Wait()
aborted := false
var succeeded exec.Success
for {
select {
case <-build.releaseCh:
logger.Info("releasing")
return
case err := <-exited:
if aborted {
succeeded = false
} else if !source.Result(&succeeded) {
logger.Error("step-had-no-result", errors.New("step failed to provide us with a result"))
succeeded = false
}
build.delegate.Finish(logger.Session("finish"), err, succeeded, aborted)
return
case sig := <-build.signals:
process.Signal(sig)
if sig == os.Kill {
aborted = true
}
}
}
}
func (build *execBuild) buildStepFactory(logger lager.Logger, plan atc.Plan) exec.StepFactory {
if plan.Aggregate != nil {
return build.buildAggregateStep(logger, plan)
}
if plan.Do != nil {
return build.buildDoStep(logger, plan)
}
if plan.Timeout != nil {
return build.buildTimeoutStep(logger, plan)
}
if plan.Try != nil {
return build.buildTryStep(logger, plan)
}
if plan.OnSuccess != nil {
return build.buildOnSuccessStep(logger, plan)
}
if plan.OnFailure != nil {
return build.buildOnFailureStep(logger, plan)
}
if plan.Ensure != nil {
return build.buildEnsureStep(logger, plan)
}
if plan.Task != nil {
return build.buildTaskStep(logger, plan)
}
if plan.Get != nil {
return build.buildGetStep(logger, plan)
}
if plan.Put != nil {
return build.buildPutStep(logger, plan)
}
if plan.DependentGet != nil {
return build.buildDependentGetStep(logger, plan)
}
if plan.Retry != nil {
return build.buildRetryStep(logger, plan)
}
return exec.Identity{}
}
func (build *execBuild) workerMetadata(
containerType dbng.ContainerType,
stepName string,
attempts []int,
) dbng.ContainerMetadata {
attemptStrs := []string{}
for _, a := range attempts {
attemptStrs = append(attemptStrs, strconv.Itoa(a))
}
return dbng.ContainerMetadata{
Type: containerType,
PipelineID: build.pipelineID,
JobID: build.jobID,
BuildID: build.buildID,
PipelineName: build.pipelineName,
JobName: build.jobName,
BuildName: build.buildName,
StepName: stepName,
Attempt: strings.Join(attemptStrs, "."),
}
}