mirror of
https://github.com/open-telemetry/opentelemetry-go.git
synced 2024-12-28 21:09:17 +02:00
108 lines
3.0 KiB
Go
108 lines
3.0 KiB
Go
// 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 otlpmetricgrpc // import "go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc"
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import (
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"context"
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"errors"
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"fmt"
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"sync"
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"google.golang.org/grpc"
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"go.opentelemetry.io/otel/exporters/otlp/otlpmetric"
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"go.opentelemetry.io/otel/exporters/otlp/otlpmetric/internal/connection"
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"go.opentelemetry.io/otel/exporters/otlp/otlpmetric/internal/otlpconfig"
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colmetricpb "go.opentelemetry.io/proto/otlp/collector/metrics/v1"
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metricpb "go.opentelemetry.io/proto/otlp/metrics/v1"
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)
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type client struct {
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connection *connection.Connection
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lock sync.Mutex
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metricsClient colmetricpb.MetricsServiceClient
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}
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var (
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errNoClient = errors.New("no client")
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)
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// NewClient creates a new gRPC metric client.
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func NewClient(opts ...Option) otlpmetric.Client {
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cfg := otlpconfig.NewDefaultConfig()
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otlpconfig.ApplyGRPCEnvConfigs(&cfg)
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for _, opt := range opts {
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opt.applyGRPCOption(&cfg)
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}
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c := &client{}
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c.connection = connection.NewConnection(cfg, cfg.Metrics, c.handleNewConnection)
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return c
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}
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func (c *client) handleNewConnection(cc *grpc.ClientConn) {
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c.lock.Lock()
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defer c.lock.Unlock()
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if cc != nil {
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c.metricsClient = colmetricpb.NewMetricsServiceClient(cc)
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} else {
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c.metricsClient = nil
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}
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}
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// Start establishes a connection to the collector.
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func (c *client) Start(ctx context.Context) error {
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return c.connection.StartConnection(ctx)
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}
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// Stop shuts down the connection to the collector.
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func (c *client) Stop(ctx context.Context) error {
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return c.connection.Shutdown(ctx)
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}
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// UploadMetrics sends a batch of metrics to the collector.
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func (c *client) UploadMetrics(ctx context.Context, protoMetrics []*metricpb.ResourceMetrics) error {
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if !c.connection.Connected() {
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return fmt.Errorf("metrics exporter is disconnected from the server %s: %w", c.connection.SCfg.Endpoint, c.connection.LastConnectError())
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}
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ctx, cancel := c.connection.ContextWithStop(ctx)
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defer cancel()
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ctx, tCancel := context.WithTimeout(ctx, c.connection.SCfg.Timeout)
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defer tCancel()
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ctx = c.connection.ContextWithMetadata(ctx)
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err := func() error {
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c.lock.Lock()
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defer c.lock.Unlock()
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if c.metricsClient == nil {
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return errNoClient
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}
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return c.connection.DoRequest(ctx, func(ctx context.Context) error {
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_, err := c.metricsClient.Export(ctx, &colmetricpb.ExportMetricsServiceRequest{
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ResourceMetrics: protoMetrics,
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})
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return err
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})
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}()
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if err != nil {
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c.connection.SetStateDisconnected(err)
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}
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return err
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}
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