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meter_vm.go
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meter_vm.go
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// (c) 2019-2020, Ava Labs, Inc. All rights reserved.
// See the file LICENSE for licensing terms.
package vertex
import (
"fmt"
"github.com/ava-labs/avalanchego/snow/engine/avalanche/vertex"
"github.com/ava-labs/avalanchego/database/manager"
"github.com/ava-labs/avalanchego/ids"
"github.com/ava-labs/avalanchego/snow"
"github.com/ava-labs/avalanchego/snow/consensus/snowstorm"
"github.com/ava-labs/avalanchego/snow/engine/common"
latencyMetrics "github.com/ava-labs/avalanchego/utils/metrics"
"github.com/ava-labs/avalanchego/utils/timer"
"github.com/ava-labs/avalanchego/utils/wrappers"
"github.com/prometheus/client_golang/prometheus"
)
var _ vertex.DAGVM = &MeterVM{}
func NewMeterVM(vm vertex.DAGVM) vertex.DAGVM {
return &MeterVM{
DAGVM: vm,
}
}
type metrics struct {
pending,
parse,
get prometheus.Histogram
}
func (m *metrics) Initialize(
namespace string,
registerer prometheus.Registerer,
) error {
m.pending = latencyMetrics.NewNanosecnodsLatencyMetric(namespace, "pending_txs")
m.parse = latencyMetrics.NewNanosecnodsLatencyMetric(namespace, "parse_tx")
m.get = latencyMetrics.NewNanosecnodsLatencyMetric(namespace, "get_tx")
errs := wrappers.Errs{}
errs.Add(
registerer.Register(m.pending),
registerer.Register(m.parse),
registerer.Register(m.get),
)
return errs.Err
}
type MeterVM struct {
vertex.DAGVM
metrics
clock timer.Clock
}
func (vm *MeterVM) Initialize(
ctx *snow.Context,
db manager.Manager,
genesisBytes,
upgradeBytes,
configBytes []byte,
toEngine chan<- common.Message,
fxs []*common.Fx,
) error {
if err := vm.metrics.Initialize(fmt.Sprintf("metervm_%s", ctx.Namespace), ctx.Metrics); err != nil {
return err
}
return vm.DAGVM.Initialize(ctx, db, genesisBytes, upgradeBytes, configBytes, toEngine, fxs)
}
func (vm *MeterVM) PendingTxs() []snowstorm.Tx {
start := vm.clock.Time()
txs := vm.DAGVM.PendingTxs()
end := vm.clock.Time()
vm.metrics.pending.Observe(float64(end.Sub(start)))
return txs
}
func (vm *MeterVM) ParseTx(b []byte) (snowstorm.Tx, error) {
start := vm.clock.Time()
tx, err := vm.DAGVM.ParseTx(b)
end := vm.clock.Time()
vm.metrics.parse.Observe(float64(end.Sub(start)))
return tx, err
}
func (vm *MeterVM) GetTx(txID ids.ID) (snowstorm.Tx, error) {
start := vm.clock.Time()
tx, err := vm.DAGVM.GetTx(txID)
end := vm.clock.Time()
vm.metrics.get.Observe(float64(end.Sub(start)))
return tx, err
}