mirror of
https://github.com/superseriousbusiness/gotosocial.git
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596 lines
20 KiB
Go
596 lines
20 KiB
Go
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// Copyright The OpenTelemetry Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package metric // import "go.opentelemetry.io/otel/sdk/metric"
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import (
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"context"
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"errors"
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"fmt"
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"go.opentelemetry.io/otel/internal/global"
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"go.opentelemetry.io/otel/metric"
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"go.opentelemetry.io/otel/metric/embedded"
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"go.opentelemetry.io/otel/sdk/instrumentation"
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"go.opentelemetry.io/otel/sdk/metric/internal/aggregate"
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)
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// ErrInstrumentName indicates the created instrument has an invalid name.
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// Valid names must consist of 255 or fewer characters including alphanumeric, _, ., -, / and start with a letter.
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var ErrInstrumentName = errors.New("invalid instrument name")
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// meter handles the creation and coordination of all metric instruments. A
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// meter represents a single instrumentation scope; all metric telemetry
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// produced by an instrumentation scope will use metric instruments from a
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// single meter.
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type meter struct {
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embedded.Meter
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scope instrumentation.Scope
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pipes pipelines
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int64Resolver resolver[int64]
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float64Resolver resolver[float64]
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}
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func newMeter(s instrumentation.Scope, p pipelines) *meter {
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// viewCache ensures instrument conflicts, including number conflicts, this
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// meter is asked to create are logged to the user.
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var viewCache cache[string, instID]
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return &meter{
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scope: s,
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pipes: p,
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int64Resolver: newResolver[int64](p, &viewCache),
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float64Resolver: newResolver[float64](p, &viewCache),
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}
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}
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// Compile-time check meter implements metric.Meter.
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var _ metric.Meter = (*meter)(nil)
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// Int64Counter returns a new instrument identified by name and configured with
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// options. The instrument is used to synchronously record increasing int64
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// measurements during a computational operation.
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func (m *meter) Int64Counter(name string, options ...metric.Int64CounterOption) (metric.Int64Counter, error) {
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cfg := metric.NewInt64CounterConfig(options...)
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const kind = InstrumentKindCounter
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p := int64InstProvider{m}
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i, err := p.lookup(kind, name, cfg.Description(), cfg.Unit())
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if err != nil {
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return i, err
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}
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return i, validateInstrumentName(name)
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}
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// Int64UpDownCounter returns a new instrument identified by name and
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// configured with options. The instrument is used to synchronously record
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// int64 measurements during a computational operation.
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func (m *meter) Int64UpDownCounter(name string, options ...metric.Int64UpDownCounterOption) (metric.Int64UpDownCounter, error) {
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cfg := metric.NewInt64UpDownCounterConfig(options...)
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const kind = InstrumentKindUpDownCounter
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p := int64InstProvider{m}
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i, err := p.lookup(kind, name, cfg.Description(), cfg.Unit())
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if err != nil {
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return i, err
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}
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return i, validateInstrumentName(name)
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}
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// Int64Histogram returns a new instrument identified by name and configured
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// with options. The instrument is used to synchronously record the
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// distribution of int64 measurements during a computational operation.
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func (m *meter) Int64Histogram(name string, options ...metric.Int64HistogramOption) (metric.Int64Histogram, error) {
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cfg := metric.NewInt64HistogramConfig(options...)
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p := int64InstProvider{m}
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i, err := p.lookupHistogram(name, cfg)
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if err != nil {
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return i, err
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}
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return i, validateInstrumentName(name)
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}
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// Int64ObservableCounter returns a new instrument identified by name and
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// configured with options. The instrument is used to asynchronously record
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// increasing int64 measurements once per a measurement collection cycle.
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// Only the measurements recorded during the collection cycle are exported.
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func (m *meter) Int64ObservableCounter(name string, options ...metric.Int64ObservableCounterOption) (metric.Int64ObservableCounter, error) {
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cfg := metric.NewInt64ObservableCounterConfig(options...)
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const kind = InstrumentKindObservableCounter
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p := int64ObservProvider{m}
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inst, err := p.lookup(kind, name, cfg.Description(), cfg.Unit())
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if err != nil {
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return nil, err
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}
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p.registerCallbacks(inst, cfg.Callbacks())
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return inst, validateInstrumentName(name)
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}
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// Int64ObservableUpDownCounter returns a new instrument identified by name and
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// configured with options. The instrument is used to asynchronously record
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// int64 measurements once per a measurement collection cycle. Only the
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// measurements recorded during the collection cycle are exported.
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func (m *meter) Int64ObservableUpDownCounter(name string, options ...metric.Int64ObservableUpDownCounterOption) (metric.Int64ObservableUpDownCounter, error) {
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cfg := metric.NewInt64ObservableUpDownCounterConfig(options...)
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const kind = InstrumentKindObservableUpDownCounter
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p := int64ObservProvider{m}
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inst, err := p.lookup(kind, name, cfg.Description(), cfg.Unit())
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if err != nil {
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return nil, err
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}
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p.registerCallbacks(inst, cfg.Callbacks())
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return inst, validateInstrumentName(name)
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}
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// Int64ObservableGauge returns a new instrument identified by name and
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// configured with options. The instrument is used to asynchronously record
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// instantaneous int64 measurements once per a measurement collection cycle.
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// Only the measurements recorded during the collection cycle are exported.
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func (m *meter) Int64ObservableGauge(name string, options ...metric.Int64ObservableGaugeOption) (metric.Int64ObservableGauge, error) {
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cfg := metric.NewInt64ObservableGaugeConfig(options...)
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const kind = InstrumentKindObservableGauge
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p := int64ObservProvider{m}
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inst, err := p.lookup(kind, name, cfg.Description(), cfg.Unit())
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if err != nil {
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return nil, err
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}
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p.registerCallbacks(inst, cfg.Callbacks())
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return inst, validateInstrumentName(name)
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}
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// Float64Counter returns a new instrument identified by name and configured
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// with options. The instrument is used to synchronously record increasing
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// float64 measurements during a computational operation.
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func (m *meter) Float64Counter(name string, options ...metric.Float64CounterOption) (metric.Float64Counter, error) {
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cfg := metric.NewFloat64CounterConfig(options...)
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const kind = InstrumentKindCounter
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p := float64InstProvider{m}
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i, err := p.lookup(kind, name, cfg.Description(), cfg.Unit())
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if err != nil {
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return i, err
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}
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return i, validateInstrumentName(name)
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}
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// Float64UpDownCounter returns a new instrument identified by name and
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// configured with options. The instrument is used to synchronously record
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// float64 measurements during a computational operation.
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func (m *meter) Float64UpDownCounter(name string, options ...metric.Float64UpDownCounterOption) (metric.Float64UpDownCounter, error) {
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cfg := metric.NewFloat64UpDownCounterConfig(options...)
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const kind = InstrumentKindUpDownCounter
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p := float64InstProvider{m}
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i, err := p.lookup(kind, name, cfg.Description(), cfg.Unit())
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if err != nil {
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return i, err
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}
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return i, validateInstrumentName(name)
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}
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// Float64Histogram returns a new instrument identified by name and configured
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// with options. The instrument is used to synchronously record the
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// distribution of float64 measurements during a computational operation.
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func (m *meter) Float64Histogram(name string, options ...metric.Float64HistogramOption) (metric.Float64Histogram, error) {
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cfg := metric.NewFloat64HistogramConfig(options...)
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p := float64InstProvider{m}
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i, err := p.lookupHistogram(name, cfg)
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if err != nil {
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return i, err
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}
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return i, validateInstrumentName(name)
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}
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// Float64ObservableCounter returns a new instrument identified by name and
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// configured with options. The instrument is used to asynchronously record
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// increasing float64 measurements once per a measurement collection cycle.
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// Only the measurements recorded during the collection cycle are exported.
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func (m *meter) Float64ObservableCounter(name string, options ...metric.Float64ObservableCounterOption) (metric.Float64ObservableCounter, error) {
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cfg := metric.NewFloat64ObservableCounterConfig(options...)
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const kind = InstrumentKindObservableCounter
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p := float64ObservProvider{m}
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inst, err := p.lookup(kind, name, cfg.Description(), cfg.Unit())
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if err != nil {
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return nil, err
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}
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p.registerCallbacks(inst, cfg.Callbacks())
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return inst, validateInstrumentName(name)
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}
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// Float64ObservableUpDownCounter returns a new instrument identified by name
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// and configured with options. The instrument is used to asynchronously record
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// float64 measurements once per a measurement collection cycle. Only the
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// measurements recorded during the collection cycle are exported.
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func (m *meter) Float64ObservableUpDownCounter(name string, options ...metric.Float64ObservableUpDownCounterOption) (metric.Float64ObservableUpDownCounter, error) {
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cfg := metric.NewFloat64ObservableUpDownCounterConfig(options...)
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const kind = InstrumentKindObservableUpDownCounter
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p := float64ObservProvider{m}
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inst, err := p.lookup(kind, name, cfg.Description(), cfg.Unit())
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if err != nil {
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return nil, err
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}
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p.registerCallbacks(inst, cfg.Callbacks())
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return inst, validateInstrumentName(name)
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}
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// Float64ObservableGauge returns a new instrument identified by name and
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// configured with options. The instrument is used to asynchronously record
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// instantaneous float64 measurements once per a measurement collection cycle.
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// Only the measurements recorded during the collection cycle are exported.
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func (m *meter) Float64ObservableGauge(name string, options ...metric.Float64ObservableGaugeOption) (metric.Float64ObservableGauge, error) {
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cfg := metric.NewFloat64ObservableGaugeConfig(options...)
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const kind = InstrumentKindObservableGauge
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p := float64ObservProvider{m}
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inst, err := p.lookup(kind, name, cfg.Description(), cfg.Unit())
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if err != nil {
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return nil, err
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}
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p.registerCallbacks(inst, cfg.Callbacks())
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return inst, validateInstrumentName(name)
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}
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func validateInstrumentName(name string) error {
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if len(name) == 0 {
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return fmt.Errorf("%w: %s: is empty", ErrInstrumentName, name)
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}
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if len(name) > 255 {
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return fmt.Errorf("%w: %s: longer than 255 characters", ErrInstrumentName, name)
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}
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if !isAlpha([]rune(name)[0]) {
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return fmt.Errorf("%w: %s: must start with a letter", ErrInstrumentName, name)
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}
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if len(name) == 1 {
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return nil
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}
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for _, c := range name[1:] {
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if !isAlphanumeric(c) && c != '_' && c != '.' && c != '-' && c != '/' {
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return fmt.Errorf("%w: %s: must only contain [A-Za-z0-9_.-/]", ErrInstrumentName, name)
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}
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}
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return nil
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}
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func isAlpha(c rune) bool {
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return ('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z')
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}
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func isAlphanumeric(c rune) bool {
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return isAlpha(c) || ('0' <= c && c <= '9')
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}
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// RegisterCallback registers f to be called each collection cycle so it will
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// make observations for insts during those cycles.
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//
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// The only instruments f can make observations for are insts. All other
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// observations will be dropped and an error will be logged.
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//
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// Only instruments from this meter can be registered with f, an error is
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// returned if other instrument are provided.
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//
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// Only observations made in the callback will be exported. Unlike synchronous
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// instruments, asynchronous callbacks can "forget" attribute sets that are no
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// longer relevant by omitting the observation during the callback.
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//
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// The returned Registration can be used to unregister f.
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func (m *meter) RegisterCallback(f metric.Callback, insts ...metric.Observable) (metric.Registration, error) {
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if len(insts) == 0 {
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// Don't allocate a observer if not needed.
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return noopRegister{}, nil
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}
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reg := newObserver()
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var errs multierror
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for _, inst := range insts {
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// Unwrap any global.
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if u, ok := inst.(interface {
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Unwrap() metric.Observable
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}); ok {
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inst = u.Unwrap()
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}
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switch o := inst.(type) {
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case int64Observable:
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if err := o.registerable(m); err != nil {
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if !errors.Is(err, errEmptyAgg) {
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errs.append(err)
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}
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continue
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}
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reg.registerInt64(o.observablID)
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case float64Observable:
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if err := o.registerable(m); err != nil {
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if !errors.Is(err, errEmptyAgg) {
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errs.append(err)
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}
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continue
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}
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reg.registerFloat64(o.observablID)
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default:
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// Instrument external to the SDK.
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return nil, fmt.Errorf("invalid observable: from different implementation")
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}
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}
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err := errs.errorOrNil()
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if reg.len() == 0 {
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// All insts use drop aggregation or are invalid.
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return noopRegister{}, err
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}
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// Some or all instruments were valid.
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cback := func(ctx context.Context) error { return f(ctx, reg) }
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return m.pipes.registerMultiCallback(cback), err
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}
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type observer struct {
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embedded.Observer
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|
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float64 map[observablID[float64]]struct{}
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int64 map[observablID[int64]]struct{}
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}
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func newObserver() observer {
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return observer{
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float64: make(map[observablID[float64]]struct{}),
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int64: make(map[observablID[int64]]struct{}),
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}
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}
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func (r observer) len() int {
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return len(r.float64) + len(r.int64)
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|
}
|
||
|
|
|
||
|
|
func (r observer) registerFloat64(id observablID[float64]) {
|
||
|
|
r.float64[id] = struct{}{}
|
||
|
|
}
|
||
|
|
|
||
|
|
func (r observer) registerInt64(id observablID[int64]) {
|
||
|
|
r.int64[id] = struct{}{}
|
||
|
|
}
|
||
|
|
|
||
|
|
var (
|
||
|
|
errUnknownObserver = errors.New("unknown observable instrument")
|
||
|
|
errUnregObserver = errors.New("observable instrument not registered for callback")
|
||
|
|
)
|
||
|
|
|
||
|
|
func (r observer) ObserveFloat64(o metric.Float64Observable, v float64, opts ...metric.ObserveOption) {
|
||
|
|
var oImpl float64Observable
|
||
|
|
switch conv := o.(type) {
|
||
|
|
case float64Observable:
|
||
|
|
oImpl = conv
|
||
|
|
case interface {
|
||
|
|
Unwrap() metric.Observable
|
||
|
|
}:
|
||
|
|
// Unwrap any global.
|
||
|
|
async := conv.Unwrap()
|
||
|
|
var ok bool
|
||
|
|
if oImpl, ok = async.(float64Observable); !ok {
|
||
|
|
global.Error(errUnknownObserver, "failed to record asynchronous")
|
||
|
|
return
|
||
|
|
}
|
||
|
|
default:
|
||
|
|
global.Error(errUnknownObserver, "failed to record")
|
||
|
|
return
|
||
|
|
}
|
||
|
|
|
||
|
|
if _, registered := r.float64[oImpl.observablID]; !registered {
|
||
|
|
global.Error(errUnregObserver, "failed to record",
|
||
|
|
"name", oImpl.name,
|
||
|
|
"description", oImpl.description,
|
||
|
|
"unit", oImpl.unit,
|
||
|
|
"number", fmt.Sprintf("%T", float64(0)),
|
||
|
|
)
|
||
|
|
return
|
||
|
|
}
|
||
|
|
c := metric.NewObserveConfig(opts)
|
||
|
|
oImpl.observe(v, c.Attributes())
|
||
|
|
}
|
||
|
|
|
||
|
|
func (r observer) ObserveInt64(o metric.Int64Observable, v int64, opts ...metric.ObserveOption) {
|
||
|
|
var oImpl int64Observable
|
||
|
|
switch conv := o.(type) {
|
||
|
|
case int64Observable:
|
||
|
|
oImpl = conv
|
||
|
|
case interface {
|
||
|
|
Unwrap() metric.Observable
|
||
|
|
}:
|
||
|
|
// Unwrap any global.
|
||
|
|
async := conv.Unwrap()
|
||
|
|
var ok bool
|
||
|
|
if oImpl, ok = async.(int64Observable); !ok {
|
||
|
|
global.Error(errUnknownObserver, "failed to record asynchronous")
|
||
|
|
return
|
||
|
|
}
|
||
|
|
default:
|
||
|
|
global.Error(errUnknownObserver, "failed to record")
|
||
|
|
return
|
||
|
|
}
|
||
|
|
|
||
|
|
if _, registered := r.int64[oImpl.observablID]; !registered {
|
||
|
|
global.Error(errUnregObserver, "failed to record",
|
||
|
|
"name", oImpl.name,
|
||
|
|
"description", oImpl.description,
|
||
|
|
"unit", oImpl.unit,
|
||
|
|
"number", fmt.Sprintf("%T", int64(0)),
|
||
|
|
)
|
||
|
|
return
|
||
|
|
}
|
||
|
|
c := metric.NewObserveConfig(opts)
|
||
|
|
oImpl.observe(v, c.Attributes())
|
||
|
|
}
|
||
|
|
|
||
|
|
type noopRegister struct{ embedded.Registration }
|
||
|
|
|
||
|
|
func (noopRegister) Unregister() error {
|
||
|
|
return nil
|
||
|
|
}
|
||
|
|
|
||
|
|
// int64InstProvider provides int64 OpenTelemetry instruments.
|
||
|
|
type int64InstProvider struct{ *meter }
|
||
|
|
|
||
|
|
func (p int64InstProvider) aggs(kind InstrumentKind, name, desc, u string) ([]aggregate.Measure[int64], error) {
|
||
|
|
inst := Instrument{
|
||
|
|
Name: name,
|
||
|
|
Description: desc,
|
||
|
|
Unit: u,
|
||
|
|
Kind: kind,
|
||
|
|
Scope: p.scope,
|
||
|
|
}
|
||
|
|
return p.int64Resolver.Aggregators(inst)
|
||
|
|
}
|
||
|
|
|
||
|
|
func (p int64InstProvider) histogramAggs(name string, cfg metric.Int64HistogramConfig) ([]aggregate.Measure[int64], error) {
|
||
|
|
boundaries := cfg.ExplicitBucketBoundaries()
|
||
|
|
aggError := AggregationExplicitBucketHistogram{Boundaries: boundaries}.err()
|
||
|
|
if aggError != nil {
|
||
|
|
// If boundaries are invalid, ignore them.
|
||
|
|
boundaries = nil
|
||
|
|
}
|
||
|
|
inst := Instrument{
|
||
|
|
Name: name,
|
||
|
|
Description: cfg.Description(),
|
||
|
|
Unit: cfg.Unit(),
|
||
|
|
Kind: InstrumentKindHistogram,
|
||
|
|
Scope: p.scope,
|
||
|
|
}
|
||
|
|
measures, err := p.int64Resolver.HistogramAggregators(inst, boundaries)
|
||
|
|
return measures, errors.Join(aggError, err)
|
||
|
|
}
|
||
|
|
|
||
|
|
// lookup returns the resolved instrumentImpl.
|
||
|
|
func (p int64InstProvider) lookup(kind InstrumentKind, name, desc, u string) (*int64Inst, error) {
|
||
|
|
aggs, err := p.aggs(kind, name, desc, u)
|
||
|
|
return &int64Inst{measures: aggs}, err
|
||
|
|
}
|
||
|
|
|
||
|
|
// lookupHistogram returns the resolved instrumentImpl.
|
||
|
|
func (p int64InstProvider) lookupHistogram(name string, cfg metric.Int64HistogramConfig) (*int64Inst, error) {
|
||
|
|
aggs, err := p.histogramAggs(name, cfg)
|
||
|
|
return &int64Inst{measures: aggs}, err
|
||
|
|
}
|
||
|
|
|
||
|
|
// float64InstProvider provides float64 OpenTelemetry instruments.
|
||
|
|
type float64InstProvider struct{ *meter }
|
||
|
|
|
||
|
|
func (p float64InstProvider) aggs(kind InstrumentKind, name, desc, u string) ([]aggregate.Measure[float64], error) {
|
||
|
|
inst := Instrument{
|
||
|
|
Name: name,
|
||
|
|
Description: desc,
|
||
|
|
Unit: u,
|
||
|
|
Kind: kind,
|
||
|
|
Scope: p.scope,
|
||
|
|
}
|
||
|
|
return p.float64Resolver.Aggregators(inst)
|
||
|
|
}
|
||
|
|
|
||
|
|
func (p float64InstProvider) histogramAggs(name string, cfg metric.Float64HistogramConfig) ([]aggregate.Measure[float64], error) {
|
||
|
|
boundaries := cfg.ExplicitBucketBoundaries()
|
||
|
|
aggError := AggregationExplicitBucketHistogram{Boundaries: boundaries}.err()
|
||
|
|
if aggError != nil {
|
||
|
|
// If boundaries are invalid, ignore them.
|
||
|
|
boundaries = nil
|
||
|
|
}
|
||
|
|
inst := Instrument{
|
||
|
|
Name: name,
|
||
|
|
Description: cfg.Description(),
|
||
|
|
Unit: cfg.Unit(),
|
||
|
|
Kind: InstrumentKindHistogram,
|
||
|
|
Scope: p.scope,
|
||
|
|
}
|
||
|
|
measures, err := p.float64Resolver.HistogramAggregators(inst, boundaries)
|
||
|
|
return measures, errors.Join(aggError, err)
|
||
|
|
}
|
||
|
|
|
||
|
|
// lookup returns the resolved instrumentImpl.
|
||
|
|
func (p float64InstProvider) lookup(kind InstrumentKind, name, desc, u string) (*float64Inst, error) {
|
||
|
|
aggs, err := p.aggs(kind, name, desc, u)
|
||
|
|
return &float64Inst{measures: aggs}, err
|
||
|
|
}
|
||
|
|
|
||
|
|
// lookupHistogram returns the resolved instrumentImpl.
|
||
|
|
func (p float64InstProvider) lookupHistogram(name string, cfg metric.Float64HistogramConfig) (*float64Inst, error) {
|
||
|
|
aggs, err := p.histogramAggs(name, cfg)
|
||
|
|
return &float64Inst{measures: aggs}, err
|
||
|
|
}
|
||
|
|
|
||
|
|
type int64ObservProvider struct{ *meter }
|
||
|
|
|
||
|
|
func (p int64ObservProvider) lookup(kind InstrumentKind, name, desc, u string) (int64Observable, error) {
|
||
|
|
aggs, err := (int64InstProvider)(p).aggs(kind, name, desc, u)
|
||
|
|
return newInt64Observable(p.meter, kind, name, desc, u, aggs), err
|
||
|
|
}
|
||
|
|
|
||
|
|
func (p int64ObservProvider) registerCallbacks(inst int64Observable, cBacks []metric.Int64Callback) {
|
||
|
|
if inst.observable == nil || len(inst.measures) == 0 {
|
||
|
|
// Drop aggregator.
|
||
|
|
return
|
||
|
|
}
|
||
|
|
|
||
|
|
for _, cBack := range cBacks {
|
||
|
|
p.pipes.registerCallback(p.callback(inst, cBack))
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
func (p int64ObservProvider) callback(i int64Observable, f metric.Int64Callback) func(context.Context) error {
|
||
|
|
inst := int64Observer{int64Observable: i}
|
||
|
|
return func(ctx context.Context) error { return f(ctx, inst) }
|
||
|
|
}
|
||
|
|
|
||
|
|
type int64Observer struct {
|
||
|
|
embedded.Int64Observer
|
||
|
|
int64Observable
|
||
|
|
}
|
||
|
|
|
||
|
|
func (o int64Observer) Observe(val int64, opts ...metric.ObserveOption) {
|
||
|
|
c := metric.NewObserveConfig(opts)
|
||
|
|
o.observe(val, c.Attributes())
|
||
|
|
}
|
||
|
|
|
||
|
|
type float64ObservProvider struct{ *meter }
|
||
|
|
|
||
|
|
func (p float64ObservProvider) lookup(kind InstrumentKind, name, desc, u string) (float64Observable, error) {
|
||
|
|
aggs, err := (float64InstProvider)(p).aggs(kind, name, desc, u)
|
||
|
|
return newFloat64Observable(p.meter, kind, name, desc, u, aggs), err
|
||
|
|
}
|
||
|
|
|
||
|
|
func (p float64ObservProvider) registerCallbacks(inst float64Observable, cBacks []metric.Float64Callback) {
|
||
|
|
if inst.observable == nil || len(inst.measures) == 0 {
|
||
|
|
// Drop aggregator.
|
||
|
|
return
|
||
|
|
}
|
||
|
|
|
||
|
|
for _, cBack := range cBacks {
|
||
|
|
p.pipes.registerCallback(p.callback(inst, cBack))
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
func (p float64ObservProvider) callback(i float64Observable, f metric.Float64Callback) func(context.Context) error {
|
||
|
|
inst := float64Observer{float64Observable: i}
|
||
|
|
return func(ctx context.Context) error { return f(ctx, inst) }
|
||
|
|
}
|
||
|
|
|
||
|
|
type float64Observer struct {
|
||
|
|
embedded.Float64Observer
|
||
|
|
float64Observable
|
||
|
|
}
|
||
|
|
|
||
|
|
func (o float64Observer) Observe(val float64, opts ...metric.ObserveOption) {
|
||
|
|
c := metric.NewObserveConfig(opts)
|
||
|
|
o.observe(val, c.Attributes())
|
||
|
|
}
|