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table.go
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table.go
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// Copyright (c) 2017 Uber Technologies, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package metrics
import (
"time"
"github.com/pkg/errors"
"github.com/uber/jaeger-lib/metrics"
"go.uber.org/zap"
"github.com/jaegertracing/jaeger/pkg/cassandra"
storageMetrics "github.com/jaegertracing/jaeger/storage/spanstore/metrics"
)
// Table is a collection of metrics about Cassandra write operations.
type Table struct {
storageMetrics.WriteMetrics
}
// NewTable takes a metrics scope and creates a table metrics struct
func NewTable(factory metrics.Factory, tableName string) *Table {
t := storageMetrics.WriteMetrics{}
metrics.Init(&t, factory.Namespace(metrics.NSOptions{Name: "", Tags: map[string]string{"table": tableName}}), nil)
return &Table{t}
}
// Exec executes an update query and reports metrics/logs about it.
func (t *Table) Exec(query cassandra.UpdateQuery, logger *zap.Logger) error {
start := time.Now()
err := query.Exec()
t.Emit(err, time.Since(start))
if err != nil {
queryString := query.String()
if logger != nil {
logger.Error("Failed to exec query", zap.String("query", queryString), zap.Error(err))
}
return errors.Wrapf(err, "failed to Exec query '%s'", queryString)
}
return nil
}