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factory.go
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factory.go
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// Copyright (C) 2019-2023, Ava Labs, Inc. All rights reserved.
// See the file LICENSE for licensing terms.
package rpcchainvm
import (
"context"
"fmt"
"github.com/ava-labs/avalanchego/utils/logging"
"github.com/ava-labs/avalanchego/utils/resource"
"github.com/ava-labs/avalanchego/vms"
"github.com/ava-labs/avalanchego/vms/rpcchainvm/grpcutils"
"github.com/ava-labs/avalanchego/vms/rpcchainvm/runtime"
"github.com/ava-labs/avalanchego/vms/rpcchainvm/runtime/subprocess"
)
var _ vms.Factory = (*factory)(nil)
type factory struct {
path string
processTracker resource.ProcessTracker
runtimeTracker runtime.Tracker
}
func NewFactory(path string, processTracker resource.ProcessTracker, runtimeTracker runtime.Tracker) vms.Factory {
return &factory{
path: path,
processTracker: processTracker,
runtimeTracker: runtimeTracker,
}
}
func (f *factory) New(log logging.Logger) (interface{}, error) {
config := &subprocess.Config{
Stderr: log,
Stdout: log,
HandshakeTimeout: runtime.DefaultHandshakeTimeout,
Log: log,
}
listener, err := grpcutils.NewListener()
if err != nil {
return nil, fmt.Errorf("failed to create listener: %w", err)
}
status, stopper, err := subprocess.Bootstrap(
context.TODO(),
listener,
subprocess.NewCmd(f.path),
config,
)
if err != nil {
return nil, err
}
clientConn, err := grpcutils.Dial(status.Addr)
if err != nil {
return nil, err
}
vm := NewClient(clientConn)
vm.SetProcess(stopper, status.Pid, f.processTracker)
f.runtimeTracker.TrackRuntime(stopper)
return vm, nil
}