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reconcilers.go
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reconcilers.go
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package controller
import (
"fmt"
"os"
"path/filepath"
"github.com/dave/jennifer/jen"
. "github.com/dave/jennifer/jen"
"github.com/iancoleman/strcase"
"github.com/threeport/threeport/internal/sdk"
)
// controllerInternalPackagePath returns the path from the models to the
// controller's internal package where reconciler functions live.
func controllerInternalPackagePath(packageName string) string {
return filepath.Join("internal", packageName)
}
// Reconcilers generates the source code for a controller's reconcile functions.
func (cc *ControllerConfig) Reconcilers() error {
for _, obj := range cc.ReconciledObjects {
f := NewFile(cc.PackageName)
f.HeaderComment("generated by 'threeport-sdk gen' for controller scaffolding - do not edit")
f.ImportAlias("github.com/threeport/threeport/pkg/client/v0", "client")
f.ImportAlias("github.com/threeport/threeport/pkg/client/v1", "client_v1")
f.ImportAlias("github.com/threeport/threeport/pkg/controller/v0", "controller")
f.ImportAlias("github.com/threeport/threeport/pkg/notifications/v0", "notifications")
f.ImportAlias("github.com/threeport/threeport/pkg/util/v0", "util")
f.Comment(fmt.Sprintf("%[1]sReconciler reconciles system state when a %[1]s", obj.Name))
f.Comment("is created, updated or deleted.")
f.Func().Id(fmt.Sprintf("%sReconciler", obj.Name)).Params(
Id("r").Op("*").Qual(
"github.com/threeport/threeport/pkg/controller/v0",
"Reconciler",
),
).Block(
Id("r").Dot("ShutdownWait").Dot("Add").Call(Lit(1)),
Id("reconcilerLog").Op(":=").Id("r").Dot("Log").Dot("WithValues").Call(
Lit("reconcilerName"), Id("r").Dot("Name"),
),
Id("reconcilerLog").Dot("Info").Call(Lit("reconciler started")),
Id("shutdown").Op(":=").Lit(false),
Line(),
Comment("create a channel to receive OS signals"),
Id("osSignals").Op(":=").Make(
Chan().Qual("os", "Signal"),
Lit(1),
),
Id("lockReleased").Op(":=").Make(
Chan().Bool(),
Lit(1),
),
Line(),
Comment("register the os signals channel to receive SIGINT and SIGTERM signals"),
Qual("os/signal", "Notify").Call(
Id("osSignals"),
Qual("syscall", "SIGINT"),
Qual("syscall", "SIGTERM"),
),
Line(),
For().Block(
Comment("create a fresh log object per reconciliation loop so we don't"),
Comment("accumulate values across multiple loops"),
Id("log").Op(":=").Id("r").Dot("Log").Dot("WithValues").Call(
Lit("reconcilerName"), Id("r").Dot("Name"),
),
Line(),
If(Id("shutdown")).Block(
Break(),
),
Line(),
Comment("check for shutdown instruction"),
Select().Block(
Case(Op("<-").Id("r").Dot("Shutdown")).Block(
Id("shutdown").Op("=").Lit(true),
),
Default().BlockFunc(func(g *jen.Group) {
g.Comment("pull message off queue")
g.Id("msg").Op(":=").Id("r").Dot("PullMessage").Call()
g.If(Id("msg").Op("==").Nil()).Block(
Continue(),
)
g.Line()
g.Comment("consume message data to capture notification from API")
g.Id("notif").Op(",").Id("err").Op(":=").Qual(
"github.com/threeport/threeport/pkg/notifications/v0",
"ConsumeMessage",
).Call(Id("msg").Dot("Data"))
g.If(Id("err").Op("!=").Nil()).Block(
Id("log").Dot("Error").Call(
Line().Id("err"), Lit("failed to consume message data from NATS"),
Line().Lit("msgData"), Id("string").Call(Id("msg").Dot("Data")),
Line(),
),
Id("r").Dot("RequeueRaw").Call(Id("msg")),
Id("log").Dot("V").Call(Lit(1)).Dot("Info").Call(
Lit(fmt.Sprintf(
"%s reconciliation requeued with identical payload and fixed delay",
strcase.ToDelimited(obj.Name, ' '),
)),
),
Continue(),
)
g.Line()
g.Comment("decode the object that was sent in the notification")
g.Var().Id(strcase.ToLowerCamel(obj.Name)).Qual(
fmt.Sprintf("github.com/threeport/threeport/pkg/api/%s", sdk.GetLatestObjectVersion(obj.Name)),
obj.Name,
)
g.If(Id("err").Op(":=").Id(strcase.ToLowerCamel(obj.Name)).Dot("DecodeNotifObject").Call(
Id("notif").Dot("Object"),
).Op(";").Id("err").Op("!=").Nil().Block(
Id("log").Dot("Error").Call(
Id("err"), Lit("failed to marshal object map from consumed notification message"),
),
Id("r").Dot("RequeueRaw").Call(Id("msg")),
Id("log").Dot("V").Call(Lit(1)).Dot("Info").Call(
Lit(fmt.Sprintf(
"%s reconciliation requeued with identical payload and fixed delay",
strcase.ToDelimited(obj.Name, ' '),
)),
),
Continue(),
))
g.Id("log").Op("=").Id("log").Dot("WithValues").Call(
Lit(fmt.Sprintf(
"%sID",
strcase.ToLowerCamel(obj.Name),
)).Op(",").Id(strcase.ToLowerCamel(obj.Name)).Dot("ID"),
)
g.Line()
g.Comment("back off the requeue delay as needed")
g.Id("requeueDelay").Op(":=").Id("controller").Dot("SetRequeueDelay").Call(
Line().Id("notif").Dot("CreationTime"),
Line(),
)
g.Line()
g.Comment("check for lock on object")
g.Id("locked").Op(",").Id("ok").Op(":=").Id("r").Dot("CheckLock").Call(
Op("&").Id(strcase.ToLowerCamel(obj.Name)),
)
g.If(Id("locked").Op("||").Id("ok").Op("==").Id("false")).Block(
Id("r").Dot("Requeue").Call(
Op("&").Id(strcase.ToLowerCamel(obj.Name)).Op(",").Id("requeueDelay").Op(",").Id("msg"),
),
Id("log").Dot("V").Call(
Lit(1),
).Dot("Info").Call(Lit(fmt.Sprintf(
"%s reconciliation requeued",
strcase.ToDelimited(obj.Name, ' '),
))),
Continue(),
)
g.Line()
g.Comment("set up handler to unlock and requeue on termination signal")
g.Go().Func().Params().Block(
Select().Block(
Case(Op("<-").Id("osSignals")).Block(
Id("log").Dot("V").Call(Lit(1)).Dot("Info").Call(Lit(fmt.Sprintf(
"received termination signal, performing unlock and requeue of %s",
strcase.ToDelimited(obj.Name, ' '),
))),
Id("r").Dot("UnlockAndRequeue").Call(Op("&").Id(strcase.ToLowerCamel(obj.Name)), Id("requeueDelay"), Id("lockReleased"), Id("msg")),
),
Case(Op("<-").Id("lockReleased")).Block(
Id("log").Dot("V").Call(Lit(1)).Dot("Info").Call(Lit(fmt.Sprintf(
"reached end of reconcile loop for %s, closing out signal handler",
strcase.ToDelimited(obj.Name, ' '),
))),
),
),
).Call()
g.Line()
g.Comment("put a lock on the reconciliation of the created object")
g.If(Id("ok").Op(":=").Id("r").Dot("Lock").Call(
Op("&").Id(strcase.ToLowerCamel(obj.Name))).Op(";").Op("!").Id("ok"),
).Block(
Id("r").Dot("Requeue").Call(
Op("&").Id(strcase.ToLowerCamel(obj.Name)).Op(",").Id("requeueDelay").Op(",").Id("msg"),
),
Id("log").Dot("V").Call(Lit(1)).Dot("Info").Call(Lit(fmt.Sprintf(
"%s reconciliation requeued",
strcase.ToDelimited(obj.Name, ' '),
))),
Continue(),
)
g.Line()
// If the object has a "Data" field with a "persist" tag set to "false", skip
// the retrieval of the latest object. Otherwise, generate the
// source code to retrieve the latest object.
if !obj.DisableNotificationPersistence {
cc.GetLatestObject(g, obj.Name, nil)
}
g.Line()
g.Comment("determine which operation and act accordingly")
g.Switch(Id("notif").Dot("Operation")).Block(
Case(Qual(
"github.com/threeport/threeport/pkg/notifications/v0",
"NotificationOperationCreated",
)).Block(
If(Id(strcase.ToLowerCamel(obj.Name)).Dot("DeletionScheduled").Op("!=").Nil()).Block(
Id("log").Dot("Info").Call(
Lit(fmt.Sprintf("%s scheduled for deletion - skipping create", strcase.ToDelimited(obj.Name, ' '))),
),
Break(),
),
Id("customRequeueDelay").Op(",").Err().Op(":=").Id(fmt.Sprintf(
"%sCreated",
strcase.ToLowerCamel(obj.Name),
)).Call(
Id("r"),
Op("&").Id(strcase.ToLowerCamel(obj.Name)),
Op("&").Id("log"),
),
If(Err().Op("!=").Nil()).Block(
Id("log").Dot("Error").Call(
Err(), Lit(fmt.Sprintf(
"failed to reconcile created %s object",
strcase.ToDelimited(obj.Name, ' '),
)),
),
Id("r").Dot("UnlockAndRequeue").Call(
Line().Op("&").Id(strcase.ToLowerCamel(obj.Name)),
Line().Id("requeueDelay"),
Line().Id("lockReleased"),
Line().Id("msg"),
Line(),
),
Continue(),
),
If(Id("customRequeueDelay").Op("!=").Lit(0)).Block(
Id("log").Dot("Info").Call(
Lit("create requeued for future reconciliation"),
),
Id("r").Dot("UnlockAndRequeue").Call(
Line().Op("&").Id(strcase.ToLowerCamel(obj.Name)),
Line().Id("customRequeueDelay"),
Line().Id("lockReleased"),
Line().Id("msg"),
Line(),
),
Continue(),
),
),
Case(Qual(
"github.com/threeport/threeport/pkg/notifications/v0",
"NotificationOperationUpdated",
)).Block(
Id("customRequeueDelay").Op(",").Err().Op(":=").Id(fmt.Sprintf(
"%sUpdated",
strcase.ToLowerCamel(obj.Name),
)).Call(
Id("r"),
Op("&").Id(strcase.ToLowerCamel(obj.Name)),
Op("&").Id("log"),
),
If(Err().Op("!=").Nil()).Block(
Id("log").Dot("Error").Call(
Err(), Lit(fmt.Sprintf(
"failed to reconcile updated %s object",
strcase.ToDelimited(obj.Name, ' '),
)),
),
Id("r").Dot("UnlockAndRequeue").Call(
Line().Op("&").Id(strcase.ToLowerCamel(obj.Name)),
Line().Id("requeueDelay"),
Line().Id("lockReleased"),
Line().Id("msg"),
Line(),
),
Continue(),
),
If(Id("customRequeueDelay").Op("!=").Lit(0)).Block(
Id("log").Dot("Info").Call(
Lit("update requeued for future reconciliation"),
),
Id("r").Dot("UnlockAndRequeue").Call(
Line().Op("&").Id(strcase.ToLowerCamel(obj.Name)),
Line().Id("customRequeueDelay"),
Line().Id("lockReleased"),
Line().Id("msg"),
Line(),
),
Continue(),
),
),
Case(Qual(
"github.com/threeport/threeport/pkg/notifications/v0",
"NotificationOperationDeleted",
)).Block(
Id("customRequeueDelay").Op(",").Err().Op(":=").Id(fmt.Sprintf(
"%sDeleted",
strcase.ToLowerCamel(obj.Name),
)).Call(
Id("r"),
Op("&").Id(strcase.ToLowerCamel(obj.Name)),
Op("&").Id("log"),
),
If(Err().Op("!=").Nil()).Block(
Id("log").Dot("Error").Call(
Err(), Lit(fmt.Sprintf(
"failed to reconcile deleted %s object",
strcase.ToDelimited(obj.Name, ' '),
)),
),
Id("r").Dot("UnlockAndRequeue").Call(
Line().Op("&").Id(strcase.ToLowerCamel(obj.Name)),
Line().Id("requeueDelay"),
Line().Id("lockReleased"),
Line().Id("msg"),
Line(),
),
Continue(),
),
If(Id("customRequeueDelay").Op("!=").Lit(0)).Block(
Id("log").Dot("Info").Call(
Lit("deletion requeued for future reconciliation"),
),
Id("r").Dot("UnlockAndRequeue").Call(
Line().Op("&").Id(strcase.ToLowerCamel(obj.Name)),
Line().Id("customRequeueDelay"),
Line().Id("lockReleased"),
Line().Id("msg"),
Line(),
),
Continue(),
),
Id("deletionTimestamp").Op(":=").Qual("github.com/threeport/threeport/pkg/util/v0", "TimePtr").Call(Qual("time", "Now").Call().Dot("UTC").Call()),
Id(fmt.Sprintf(
"deleted%s",
obj.Name,
)).Op(":=").Qual(
fmt.Sprintf("github.com/threeport/threeport/pkg/api/%s", sdk.GetLatestObjectVersion(obj.Name)),
obj.Name,
).Values(Dict{
Id("Common"): Qual(
"github.com/threeport/threeport/pkg/api/v0",
"Common",
).Values(Dict{
Id("ID"): Id(strcase.ToLowerCamel(obj.Name)).Dot("ID"),
}),
Id("Reconciliation"): Qual(
"github.com/threeport/threeport/pkg/api/v0",
"Reconciliation",
).Values(Dict{
Id("Reconciled"): Qual("github.com/threeport/threeport/pkg/util/v0", "BoolPtr").Call(Lit(true)),
Id("DeletionAcknowledged"): Id("deletionTimestamp"),
Id("DeletionConfirmed"): Id("deletionTimestamp"),
}),
}),
If(Id("err").Op("!=").Nil()).Block(
Id("log").Dot("Error").Call(Id("err"), Lit(fmt.Sprintf(
"failed to update %s to mark as reconciled",
strcase.ToDelimited(obj.Name, ' '),
))),
Id("r").Dot("UnlockAndRequeue").Call(Op("&").Id(strcase.ToLowerCamel(obj.Name)), Id("requeueDelay"), Id("lockReleased"), Id("msg")),
Continue(),
),
Id("_").Op(",").Id("err").Op("=").Qual(
fmt.Sprintf("github.com/threeport/threeport/pkg/client/%s", sdk.GetLatestObjectVersion(obj.Name)),
fmt.Sprintf("Update%s", obj.Name),
).Call(
Line().Id("r").Dot("APIClient"),
Line().Id("r").Dot("APIServer"),
Line().Op("&").Id(fmt.Sprintf(
"deleted%s",
obj.Name,
)),
Line(),
),
If(Id("err").Op("!=").Nil()).Block(
Id("log").Dot("Error").Call(Id("err"), Lit(fmt.Sprintf(
"failed to update %s to mark as deleted",
strcase.ToDelimited(obj.Name, ' '),
))),
Id("r").Dot("UnlockAndRequeue").Call(Op("&").Id(strcase.ToLowerCamel(obj.Name)), Id("requeueDelay"), Id("lockReleased"), Id("msg")),
Continue(),
),
Id("_").Op(",").Id("err").Op("=").Qual(
"github.com/threeport/threeport/pkg/client/v0",
fmt.Sprintf("Delete%s", obj.Name),
).Call(
Line().Id("r").Dot("APIClient"),
Line().Id("r").Dot("APIServer"),
Line().Op("*").Id(strcase.ToLowerCamel(obj.Name)).Dot("ID"),
Line(),
),
If(Id("err").Op("!=").Nil()).Block(
Id("log").Dot("Error").Call(Id("err"), Lit(fmt.Sprintf(
"failed to delete %s",
strcase.ToDelimited(obj.Name, ' '),
))),
Id("r").Dot("UnlockAndRequeue").Call(Op("&").Id(strcase.ToLowerCamel(obj.Name)), Id("requeueDelay"), Id("lockReleased"), Id("msg")),
Continue(),
),
),
Default().Block(
Id("log").Dot("Error").Call(
Line().Id("errors").Dot("New").Call(Lit("unrecognized notifcation operation")),
Line().Lit("notification included an invalid operation"),
Line(),
),
Id("r").Dot("UnlockAndRequeue").Call(
Line().Op("&").Id(strcase.ToLowerCamel(obj.Name)),
Line().Id("requeueDelay"),
Line().Id("lockReleased"),
Line().Id("msg"),
Line(),
),
Continue(),
),
Line(),
)
g.Line()
g.Comment("set the object's Reconciled field to true if not deleted")
g.If(Id("notif").Dot("Operation").Op("!=").Qual(
"github.com/threeport/threeport/pkg/notifications/v0",
"NotificationOperationDeleted",
).Block(
Id(fmt.Sprintf(
"reconciled%s",
obj.Name,
)).Op(":=").Qual(
fmt.Sprintf("github.com/threeport/threeport/pkg/api/%s", sdk.GetLatestObjectVersion(obj.Name)),
obj.Name,
).Values(Dict{
Id("Common"): Qual(
"github.com/threeport/threeport/pkg/api/v0",
"Common",
).Values(Dict{
Id("ID"): Id(strcase.ToLowerCamel(obj.Name)).Dot("ID"),
}),
Id("Reconciliation"): Qual(
"github.com/threeport/threeport/pkg/api/v0",
"Reconciliation",
).Values(Dict{
Id("Reconciled"): Qual("github.com/threeport/threeport/pkg/util/v0", "BoolPtr").Call(Lit(true)),
}),
}),
Id(fmt.Sprintf(
"updated%s",
obj.Name,
)).Op(",").Id("err").Op(":=").Qual(
fmt.Sprintf("github.com/threeport/threeport/pkg/client/%s", sdk.GetLatestObjectVersion(obj.Name)),
fmt.Sprintf("Update%s", obj.Name),
).Call(
Line().Id("r").Dot("APIClient"),
Line().Id("r").Dot("APIServer"),
Line().Op("&").Id(fmt.Sprintf(
"reconciled%s",
obj.Name,
)),
Line(),
),
If(Id("err").Op("!=").Nil()).Block(
Id("log").Dot("Error").Call(Id("err"), Lit(fmt.Sprintf(
"failed to update %s to mark as reconciled",
strcase.ToDelimited(obj.Name, ' '),
))),
Id("r").Dot("UnlockAndRequeue").Call(Op("&").Id(strcase.ToLowerCamel(obj.Name)), Id("requeueDelay"), Id("lockReleased"), Id("msg")),
Continue(),
),
Id("log").Dot("V").Call(Lit(1)).Dot("Info").Call(
Line().Lit(fmt.Sprintf(
"%s marked as reconciled in API",
strcase.ToDelimited(obj.Name, ' '),
)),
Line().Lit(fmt.Sprintf(
"%sName",
strcase.ToDelimited(obj.Name, ' '),
)), Id(fmt.Sprintf(
"updated%s",
obj.Name,
)).Dot("Name"),
Line(),
),
))
g.Line()
g.Comment("release the lock on the reconciliation of the created object")
g.If(Id("ok").Op(":=").Id("r").Dot("ReleaseLock").Call(Op("&").Id(strcase.ToLowerCamel(obj.Name)), Id("lockReleased"), Id("msg"), Lit(true)), Op("!").Id("ok")).Block(
Id("log").Dot("Error").Call(
Qual("errors", "New").Call(
Lit(fmt.Sprintf(
"%s remains locked - will unlock when TTL expires",
strcase.ToDelimited(obj.Name, ' '),
)),
),
Lit(""),
),
).Else().Block(
Id("log").Dot("V").Call(Lit(1)).Dot("Info").Call(Lit(fmt.Sprintf(
"%s unlocked",
strcase.ToDelimited(obj.Name, ' '),
))),
)
g.Line()
g.Id("log").Dot("Info").Call(
Qual("fmt", "Sprintf").Call(
Line().Lit(fmt.Sprintf(
"%s successfully reconciled for %%s operation",
strcase.ToDelimited(obj.Name, ' '),
)),
Line().Id("notif").Dot("Operation"),
Line(),
),
)
}),
),
),
Line(),
Id("r").Dot("Sub").Dot("Unsubscribe").Call(),
Id("reconcilerLog").Dot("Info").Call(Lit("reconciler shutting down")),
Id("r").Dot("ShutdownWait").Dot("Done").Call(),
)
// write code to file
genFilename := fmt.Sprintf("%s_gen.go", strcase.ToSnake(obj.Name))
genFilepath := filepath.Join(controllerInternalPackagePath(cc.ShortName), genFilename)
file, err := os.OpenFile(genFilepath, os.O_CREATE|os.O_WRONLY|os.O_TRUNC, 0644)
if err != nil {
return fmt.Errorf("failed to open file to write generated code for %s reconciler: %w", obj.Name, err)
}
defer file.Close()
if err := f.Render(file); err != nil {
return fmt.Errorf("failed to render generated source code for %s reconciler: %w", obj.Name, err)
}
fmt.Printf("code generation complete for %s reconciler\n", obj.Name)
}
return nil
}
func (cc *ControllerConfig) ReconcilerFunctions() error {
for _, obj := range cc.ReconciledObjects {
// Generate the file for reconciler functions the user will maintain
// write code to file only if the file does not already exists.
// this is user maintained so we want it to take effect only when the user runs generate
// after creating a new api object that needs reconciliation
recFuncFileName := fmt.Sprintf("%s.go", strcase.ToSnake(obj.Name))
recFuncFilePath := filepath.Join(controllerInternalPackagePath(cc.ShortName), recFuncFileName)
_, err := os.Stat(recFuncFilePath)
// check if error is "file not exists"
if os.IsNotExist(err) {
// Generate the file for reconciler functions the user will maintain
f := NewFile(cc.PackageName)
f.HeaderComment("generated by 'threeport-sdk gen' for controller scaffolding - do not edit")
f.ImportAlias("github.com/threeport/threeport/pkg/controller/v0", "controller")
f.ImportAlias("github.com/threeport/threeport/pkg/api/v0", "v0")
f.Comment(fmt.Sprintf("%[1]sReconciler reconciles system state when a %[1]s", obj.Name))
f.Comment("is created.")
f.Func().Id(fmt.Sprintf("%sCreated", strcase.ToLowerCamel(obj.Name))).Params(
Id("r").Op("*").Qual(
"github.com/threeport/threeport/pkg/controller/v0",
"Reconciler",
),
Id(strcase.ToLowerCamel(obj.Name)).Op("*").Qual(
"github.com/threeport/threeport/pkg/api/v0",
obj.Name,
),
Id("log").Op("*").Qual(
"github.com/go-logr/logr",
"Logger",
),
).Params(
Int64(),
Error(),
).Block(
Return(Lit(0), Nil()),
)
f.Line()
f.Comment(fmt.Sprintf("%[1]sReconciler reconciles system state when a %[1]s", obj.Name))
f.Comment("is updated.")
f.Func().Id(fmt.Sprintf("%sUpdated", strcase.ToLowerCamel(obj.Name))).Params(
Id("r").Op("*").Qual(
"github.com/threeport/threeport/pkg/controller/v0",
"Reconciler",
),
Id(strcase.ToLowerCamel(obj.Name)).Op("*").Qual(
"github.com/threeport/threeport/pkg/api/v0",
obj.Name,
),
Id("log").Op("*").Qual(
"github.com/go-logr/logr",
"Logger",
),
).Params(
Int64(),
Error(),
).Block(
Return(Lit(0), Nil()),
)
f.Line()
f.Comment(fmt.Sprintf("%[1]sReconciler reconciles system state when a %[1]s", obj.Name))
f.Comment("is deleted.")
f.Func().Id(fmt.Sprintf("%sDeleted", strcase.ToLowerCamel(obj.Name))).Params(
Id("r").Op("*").Qual(
"github.com/threeport/threeport/pkg/controller/v0",
"Reconciler",
),
Id(strcase.ToLowerCamel(obj.Name)).Op("*").Qual(
"github.com/threeport/threeport/pkg/api/v0",
obj.Name,
),
Id("log").Op("*").Qual(
"github.com/go-logr/logr",
"Logger",
),
).Params(
Int64(),
Error(),
).Block(
Return(Lit(0), Nil()),
)
recFuncFile, err := os.OpenFile(recFuncFilePath, os.O_CREATE|os.O_WRONLY|os.O_TRUNC, 0644)
if err != nil {
return fmt.Errorf("failed to open file to write generated code for %s reconciler: %w", obj.Name, err)
}
defer recFuncFile.Close()
if err := f.Render(recFuncFile); err != nil {
return fmt.Errorf("failed to render generated source code for %s reconciler: %w", obj.Name, err)
}
fmt.Printf("code generation complete for %s reconciler functions\n", obj.Name)
} else {
fmt.Printf("%s file exist, skipping generation...\n", recFuncFileName)
}
}
return nil
}
// Reconcilers generates the source code for a controller's reconcile functions in an extension.
func (cc *ControllerConfig) ExtensionReconcilers(modulePath string) error {
for _, obj := range cc.ReconciledObjects {
f := NewFile(cc.PackageName)
f.HeaderComment("generated by 'threeport-sdk gen' for controller scaffolding - do not edit")
f.ImportAlias(fmt.Sprintf("%s/pkg/client/v0", modulePath), "client")
f.ImportAlias("github.com/threeport/threeport/pkg/client/v0", "tpclient")
f.ImportAlias("github.com/threeport/threeport/pkg/controller/v0", "controller")
f.ImportAlias("github.com/threeport/threeport/pkg/notifications/v0", "notifications")
f.ImportAlias("github.com/threeport/threeport/pkg/api/v0", "tpapi")
f.Comment(fmt.Sprintf("%[1]sReconciler reconciles system state when a %[1]s", obj.Name))
f.Comment("is created, updated or deleted.")
f.Func().Id(fmt.Sprintf("%sReconciler", obj.Name)).Params(
Id("r").Op("*").Qual(
"github.com/threeport/threeport/pkg/controller/v0",
"Reconciler",
),
).Block(
Id("r").Dot("ShutdownWait").Dot("Add").Call(Lit(1)),
Id("reconcilerLog").Op(":=").Id("r").Dot("Log").Dot("WithValues").Call(
Lit("reconcilerName"), Id("r").Dot("Name"),
),
Id("reconcilerLog").Dot("Info").Call(Lit("reconciler started")),
Id("shutdown").Op(":=").Lit(false),
Line(),
Comment("create a channel to receive OS signals"),
Id("osSignals").Op(":=").Make(
Chan().Qual("os", "Signal"),
Lit(1),
),
Id("lockReleased").Op(":=").Make(
Chan().Bool(),
Lit(1),
),
Line(),
Comment("register the os signals channel to receive SIGINT and SIGTERM signals"),
Qual("os/signal", "Notify").Call(
Id("osSignals"),
Qual("syscall", "SIGINT"),
Qual("syscall", "SIGTERM"),
),
Line(),
For().Block(
Comment("create a fresh log object per reconciliation loop so we don't"),
Comment("accumulate values across multiple loops"),
Id("log").Op(":=").Id("r").Dot("Log").Dot("WithValues").Call(
Lit("reconcilerName"), Id("r").Dot("Name"),
),
Line(),
If(Id("shutdown")).Block(
Break(),
),
Line(),
Comment("check for shutdown instruction"),
Select().Block(
Case(Op("<-").Id("r").Dot("Shutdown")).Block(
Id("shutdown").Op("=").Lit(true),
),
Default().BlockFunc(func(g *jen.Group) {
g.Comment("pull message off queue")
g.Id("msg").Op(":=").Id("r").Dot("PullMessage").Call()
g.If(Id("msg").Op("==").Nil()).Block(
Continue(),
)
g.Line()
g.Comment("consume message data to capture notification from API")
g.Id("notif").Op(",").Id("err").Op(":=").Qual(
"github.com/threeport/threeport/pkg/notifications/v0",
"ConsumeMessage",
).Call(Id("msg").Dot("Data"))
g.If(Id("err").Op("!=").Nil()).Block(
Id("log").Dot("Error").Call(
Line().Id("err"), Lit("failed to consume message data from NATS"),
Line().Lit("msgData"), Id("string").Call(Id("msg").Dot("Data")),
Line(),
),
Id("r").Dot("RequeueRaw").Call(Id("msg")),
Id("log").Dot("V").Call(Lit(1)).Dot("Info").Call(
Lit(fmt.Sprintf(
"%s reconciliation requeued with identical payload and fixed delay",
strcase.ToDelimited(obj.Name, ' '),
)),
),
Continue(),
)
g.Line()
g.Comment("decode the object that was sent in the notification")
g.Var().Id(strcase.ToLowerCamel(obj.Name)).Qual(
fmt.Sprintf("%s/pkg/api/v0", modulePath),
obj.Name,
)
g.If(Id("err").Op(":=").Id(strcase.ToLowerCamel(obj.Name)).Dot("DecodeNotifObject").Call(
Id("notif").Dot("Object"),
).Op(";").Id("err").Op("!=").Nil().Block(
Id("log").Dot("Error").Call(
Id("err"), Lit("failed to marshal object map from consumed notification message"),
),
Id("r").Dot("RequeueRaw").Call(Id("msg")),
Id("log").Dot("V").Call(Lit(1)).Dot("Info").Call(
Lit(fmt.Sprintf(
"%s reconciliation requeued with identical payload and fixed delay",
strcase.ToDelimited(obj.Name, ' '),
)),
),
Continue(),
))
g.Id("log").Op("=").Id("log").Dot("WithValues").Call(
Lit(fmt.Sprintf(
"%sID",
strcase.ToLowerCamel(obj.Name),
)).Op(",").Id(strcase.ToLowerCamel(obj.Name)).Dot("ID"),
)
g.Line()
g.Comment("back off the requeue delay as needed")
g.Id("requeueDelay").Op(":=").Id("controller").Dot("SetRequeueDelay").Call(
Line().Id("notif").Dot("CreationTime"),
Line(),
)
g.Line()
g.Comment("check for lock on object")
g.Id("locked").Op(",").Id("ok").Op(":=").Id("r").Dot("CheckLock").Call(
Op("&").Id(strcase.ToLowerCamel(obj.Name)),
)
g.If(Id("locked").Op("||").Id("ok").Op("==").Id("false")).Block(
Id("r").Dot("Requeue").Call(
Op("&").Id(strcase.ToLowerCamel(obj.Name)).Op(",").Id("requeueDelay").Op(",").Id("msg"),
),
Id("log").Dot("V").Call(
Lit(1),
).Dot("Info").Call(Lit(fmt.Sprintf(
"%s reconciliation requeued",
strcase.ToDelimited(obj.Name, ' '),
))),
Continue(),
)
g.Line()
g.Comment("set up handler to unlock and requeue on termination signal")
g.Go().Func().Params().Block(
Select().Block(
Case(Op("<-").Id("osSignals")).Block(
Id("log").Dot("V").Call(Lit(1)).Dot("Info").Call(Lit(fmt.Sprintf(
"received termination signal, performing unlock and requeue of %s",
strcase.ToDelimited(obj.Name, ' '),
))),
Id("r").Dot("UnlockAndRequeue").Call(Op("&").Id(strcase.ToLowerCamel(obj.Name)), Id("requeueDelay"), Id("lockReleased"), Id("msg")),
),
Case(Op("<-").Id("lockReleased")).Block(
Id("log").Dot("V").Call(Lit(1)).Dot("Info").Call(Lit(fmt.Sprintf(
"reached end of reconcile loop for %s, closing out signal handler",
strcase.ToDelimited(obj.Name, ' '),
))),
),
),
).Call()
g.Line()
g.Comment("put a lock on the reconciliation of the created object")
g.If(Id("ok").Op(":=").Id("r").Dot("Lock").Call(
Op("&").Id(strcase.ToLowerCamel(obj.Name))).Op(";").Op("!").Id("ok"),
).Block(
Id("r").Dot("Requeue").Call(
Op("&").Id(strcase.ToLowerCamel(obj.Name)).Op(",").Id("requeueDelay").Op(",").Id("msg"),
),
Id("log").Dot("V").Call(Lit(1)).Dot("Info").Call(Lit(fmt.Sprintf(
"%s reconciliation requeued",
strcase.ToDelimited(obj.Name, ' '),
))),
Continue(),
)
g.Line()
// If the object has a "Data" field with a "persist" tag set to "false", skip
// the retrieval of the latest object. Otherwise, generate the
// source code to retrieve the latest object.
if !cc.CheckStructTagMap(obj.Name, "Data", "persist", "false") {
cc.GetLatestObject(g, obj.Name, &modulePath)
}
g.Line()
g.Comment("determine which operation and act accordingly")
g.Switch(Id("notif").Dot("Operation")).Block(
Case(Qual(
"github.com/threeport/threeport/pkg/notifications/v0",
"NotificationOperationCreated",
)).Block(
If(Id(strcase.ToLowerCamel(obj.Name)).Dot("DeletionScheduled").Op("!=").Nil()).Block(
Id("log").Dot("Info").Call(
Lit(fmt.Sprintf("%s scheduled for deletion - skipping create", strcase.ToDelimited(obj.Name, ' '))),
),
Break(),
),
Id("customRequeueDelay").Op(",").Err().Op(":=").Id(fmt.Sprintf(
"%sCreated",
strcase.ToLowerCamel(obj.Name),
)).Call(
Id("r"),
Op("&").Id(strcase.ToLowerCamel(obj.Name)),
Op("&").Id("log"),
),
If(Err().Op("!=").Nil()).Block(
Id("log").Dot("Error").Call(
Err(), Lit(fmt.Sprintf(
"failed to reconcile created %s object",
strcase.ToDelimited(obj.Name, ' '),
)),
),
Id("r").Dot("UnlockAndRequeue").Call(
Line().Op("&").Id(strcase.ToLowerCamel(obj.Name)),
Line().Id("requeueDelay"),
Line().Id("lockReleased"),
Line().Id("msg"),
Line(),
),
Continue(),
),
If(Id("customRequeueDelay").Op("!=").Lit(0)).Block(
Id("log").Dot("Info").Call(
Lit("create requeued for future reconciliation"),
),
Id("r").Dot("UnlockAndRequeue").Call(
Line().Op("&").Id(strcase.ToLowerCamel(obj.Name)),
Line().Id("customRequeueDelay"),
Line().Id("lockReleased"),
Line().Id("msg"),
Line(),
),
Continue(),
),
),
Case(Qual(
"github.com/threeport/threeport/pkg/notifications/v0",
"NotificationOperationUpdated",
)).Block(
Id("customRequeueDelay").Op(",").Err().Op(":=").Id(fmt.Sprintf(
"%sUpdated",
strcase.ToLowerCamel(obj.Name),
)).Call(
Id("r"),
Op("&").Id(strcase.ToLowerCamel(obj.Name)),
Op("&").Id("log"),
),
If(Err().Op("!=").Nil()).Block(
Id("log").Dot("Error").Call(
Err(), Lit(fmt.Sprintf(
"failed to reconcile updated %s object",
strcase.ToDelimited(obj.Name, ' '),
)),
),
Id("r").Dot("UnlockAndRequeue").Call(
Line().Op("&").Id(strcase.ToLowerCamel(obj.Name)),
Line().Id("requeueDelay"),
Line().Id("lockReleased"),
Line().Id("msg"),
Line(),
),
Continue(),
),
If(Id("customRequeueDelay").Op("!=").Lit(0)).Block(
Id("log").Dot("Info").Call(
Lit("update requeued for future reconciliation"),
),
Id("r").Dot("UnlockAndRequeue").Call(
Line().Op("&").Id(strcase.ToLowerCamel(obj.Name)),
Line().Id("customRequeueDelay"),
Line().Id("lockReleased"),
Line().Id("msg"),
Line(),
),
Continue(),
),
),
Case(Qual(
"github.com/threeport/threeport/pkg/notifications/v0",
"NotificationOperationDeleted",
)).Block(
Id("customRequeueDelay").Op(",").Err().Op(":=").Id(fmt.Sprintf(
"%sDeleted",
strcase.ToLowerCamel(obj.Name),
)).Call(
Id("r"),
Op("&").Id(strcase.ToLowerCamel(obj.Name)),
Op("&").Id("log"),
),
If(Err().Op("!=").Nil()).Block(
Id("log").Dot("Error").Call(
Err(), Lit(fmt.Sprintf(
"failed to reconcile deleted %s object",
strcase.ToDelimited(obj.Name, ' '),
)),
),
Id("r").Dot("UnlockAndRequeue").Call(
Line().Op("&").Id(strcase.ToLowerCamel(obj.Name)),
Line().Id("requeueDelay"),
Line().Id("lockReleased"),
Line().Id("msg"),
Line(),
),
Continue(),
),
If(Id("customRequeueDelay").Op("!=").Lit(0)).Block(
Id("log").Dot("Info").Call(
Lit("deletion requeued for future reconciliation"),
),
Id("r").Dot("UnlockAndRequeue").Call(
Line().Op("&").Id(strcase.ToLowerCamel(obj.Name)),
Line().Id("customRequeueDelay"),
Line().Id("lockReleased"),
Line().Id("msg"),
Line(),
),
Continue(),
),
Id("deletionTimestamp").Op(":=").Qual("github.com/threeport/threeport/pkg/util/v0", "TimePtr").Call(Qual("time", "Now").Call().Dot("UTC").Call()),
Id(fmt.Sprintf(
"deleted%s",
obj.Name,
)).Op(":=").Qual(
fmt.Sprintf("%s/pkg/api/v0", modulePath),
obj.Name,
).Values(Dict{
Id("Common"): Qual(
"github.com/threeport/threeport/pkg/api/v0",
"Common",
).Values(Dict{
Id("ID"): Id(strcase.ToLowerCamel(obj.Name)).Dot("ID"),
}),
Id("Reconciliation"): Qual(
"github.com/threeport/threeport/pkg/api/v0",
"Reconciliation",
).Values(Dict{
Id("Reconciled"): Qual("github.com/threeport/threeport/pkg/util/v0", "BoolPtr").Call(Lit(true)),
Id("DeletionAcknowledged"): Id("deletionTimestamp"),
Id("DeletionConfirmed"): Id("deletionTimestamp"),
}),
}),