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connector.go
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connector.go
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package workflow
import (
"context"
"encoding/json"
"github.com/pkg/errors"
"github.com/protoflow-labs/protoflow/gen"
"github.com/protoflow-labs/protoflow/pkg/graph"
"github.com/reactivex/rxgo/v2"
)
type Connector struct {
observers map[string]*graph.IO
cleanup []func()
}
func NewConnector() *Connector {
return &Connector{
observers: map[string]*graph.IO{},
}
}
func (c *Connector) Get(nodeID string) (*graph.IO, bool) {
o, ok := c.observers[nodeID]
return o, ok
}
func (c *Connector) Add(nodeID string, o *graph.IO) {
c.observers[nodeID] = o
}
func (c *Connector) Connect(ctx context.Context) rxgo.Observable {
var obsSlice []rxgo.Observable
for nodeID, o := range c.observers {
obsSlice = append(obsSlice, o.Observable.Map(func(ctx context.Context, i any) (any, error) {
output, err := json.Marshal(i)
if err != nil {
return nil, errors.Wrapf(err, "error marshalling output")
}
return &gen.NodeExecution{
NodeId: nodeID,
Output: string(output),
}, nil
}))
}
o := rxgo.Merge(obsSlice, rxgo.WithPublishStrategy())
for _, obs := range c.observers {
_, dispose := obs.Observable.Connect(ctx)
//obs.Observable.DoOnCompleted(func() {
// dispose()
//})
c.cleanup = append(c.cleanup, dispose)
}
_, _ = o.Connect(ctx)
return o
}
func (c *Connector) Dispose() {
for _, c := range c.cleanup {
c()
}
}