mirror of
https://github.com/prometheus/prometheus.git
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95 lines
2.5 KiB
Go
95 lines
2.5 KiB
Go
// Copyright 2016 The Prometheus Authors
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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 remote
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import (
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"time"
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"golang.org/x/net/context"
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"google.golang.org/grpc"
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"github.com/prometheus/common/model"
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)
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// Client allows sending batches of Prometheus samples to an HTTP endpoint.
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type Client struct {
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client WriteClient
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timeout time.Duration
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}
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// NewClient creates a new Client.
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func NewClient(address string, timeout time.Duration) (*Client, error) {
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conn, err := grpc.Dial(
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address,
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grpc.WithInsecure(),
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grpc.WithTimeout(timeout),
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grpc.WithCompressor(&snappyCompressor{}),
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)
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if err != nil {
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// grpc.Dial() returns immediately and doesn't error when the server is
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// unreachable when not passing in the WithBlock() option. The client then
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// will continuously try to (re)establish the connection in the background.
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// So this will only return here if some other uncommon error occurred.
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return nil, err
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}
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return &Client{
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client: NewWriteClient(conn),
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timeout: timeout,
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}, nil
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}
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// Store sends a batch of samples to the HTTP endpoint.
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func (c *Client) Store(samples model.Samples) error {
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req := &WriteRequest{
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Timeseries: make([]*TimeSeries, 0, len(samples)),
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}
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for _, s := range samples {
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ts := &TimeSeries{
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Labels: make([]*LabelPair, 0, len(s.Metric)),
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}
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for k, v := range s.Metric {
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ts.Labels = append(ts.Labels,
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&LabelPair{
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Name: string(k),
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Value: string(v),
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})
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}
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ts.Samples = []*Sample{
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{
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Value: float64(s.Value),
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TimestampMs: int64(s.Timestamp),
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},
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}
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req.Timeseries = append(req.Timeseries, ts)
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}
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ctxt, cancel := context.WithTimeout(context.TODO(), c.timeout)
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defer cancel()
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_, err := c.client.Write(ctxt, req)
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if err != nil {
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return err
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}
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return nil
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}
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// Name identifies the client as a generic client.
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//
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// TODO: This client is going to be the only one soon - then this method
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// will simply be removed in the restructuring and the whole "generic" naming
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// will be gone for good.
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func (c Client) Name() string {
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return "generic"
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}
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