Files
tasks/service/history/workflow/command_handler.go
zeekay 40351cce6f rip: delete temporal fork — native ZAP-only tasksd
Goes from 135 MB binary with 1153 files importing go.temporal.io and 224
importing google.golang.org/grpc to a 10 MB native binary with ZERO of
either.

Deleted:
- tasks/, tasktests/, service/, chasm/, client/, api/, proto/, tools/
- cmd/tools/, components/, docker/
- schema/{cassandra,elasticsearch,mysql,postgresql,sqlite}/
- 40 tainted common/ subdirs + 7 top-level common files
- tests/testutils (no longer referenced after surviving deps drop common)

New cmd/tasksd (~100 lines) boots tasks.Embed (zap.Node) + http.Server.
New pkg/tasks/embed.go registers ZAP handlers for the SDK opcode surface
(0x0060-0x00A5). Workflow handlers return a 501 "not yet implemented"
envelope; native engine lands behind this contract.

Build:  go build ./cmd/tasksd → 10 MB
Vet:    go vet ./... → clean
Boot:   tasksd --zap-port 9999 --http :7243
Probes: /healthz, /v1/tasks/health → 200
UI:     /_/tasks/, / → 200 (embedded Vite bundle)
ZAP:    _tasks._tcp on :9999 (mDNS disabled; direct connect)

go.mod: tidy. No go.temporal.io. No google.golang.org/grpc.
2026-04-26 14:06:21 -07:00

55 lines
1.8 KiB
Go

package workflow
import (
"context"
"errors"
"fmt"
commandpb "go.temporal.io/api/command/v1"
enumspb "go.temporal.io/api/enums/v1"
chasmworkflow "go.temporal.io/server/chasm/lib/workflow"
historyi "go.temporal.io/server/service/history/interfaces"
)
// ErrDuplicateRegistration is returned by a [CommandHandlerRegistry] when it detects duplicate registration.
var ErrDuplicateRegistration = errors.New("duplicate registration")
// CommandHandler is a function for handling a workflow command as part of processing a RespondWorkflowTaskCompleted
// worker request.
type CommandHandler func(
context.Context,
historyi.MutableState,
chasmworkflow.Validator,
int64,
*commandpb.Command,
) error
// CommandHandlerRegistry maintains a mapping of command type to [CommandHandler].
type CommandHandlerRegistry struct {
handlers map[enumspb.CommandType]CommandHandler
}
// NewCommandHandlerRegistry creates a new [CommandHandlerRegistry].
func NewCommandHandlerRegistry() *CommandHandlerRegistry {
return &CommandHandlerRegistry{
handlers: make(map[enumspb.CommandType]CommandHandler),
}
}
// Register registers a [CommandHandler] for a given command type.
// Returns an [ErrDuplicateRegistration] if a handler for the given command is already registered.
// All registration is expected to happen in a single thread on process initialization.
func (r *CommandHandlerRegistry) Register(t enumspb.CommandType, handler CommandHandler) error {
if existing, ok := r.handlers[t]; ok {
return fmt.Errorf("%w: command handler for %v: %v", ErrDuplicateRegistration, t, existing)
}
r.handlers[t] = handler
return nil
}
// Handler returns a [CommandHandler] for a given type and a boolean indicating whether it was found.
func (r *CommandHandlerRegistry) Handler(t enumspb.CommandType) (handler CommandHandler, ok bool) {
handler, ok = r.handlers[t]
return
}