82 lines
2.4 KiB
Go
82 lines
2.4 KiB
Go
// Copyright 2023 PingCAP, Inc.
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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 importinto
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import (
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"strconv"
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"sync"
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"github.com/pingcap/tidb/pkg/disttask/framework/proto"
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"github.com/pingcap/tidb/pkg/lightning/metric"
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tidbmetrics "github.com/pingcap/tidb/pkg/metrics"
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"github.com/pingcap/tidb/pkg/util/promutil"
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"github.com/prometheus/client_golang/prometheus"
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)
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type taskMetrics struct {
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metrics *metric.Common
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counter int
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}
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// taskMetricManager manages the metrics of IMPORT INTO tasks.
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// we have a set of metrics for each task, with different task_id const label.
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// metrics is passed by context value to avoid passing parameters everywhere.
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// both scheduler and taskExecutor might use it, to avoid registered again,
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// we add a manager to manage lifecycle of metrics for tasks.
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type taskMetricManager struct {
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sync.RWMutex
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metricsMap map[int64]*taskMetrics
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}
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var metricsManager = &taskMetricManager{
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metricsMap: make(map[int64]*taskMetrics),
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}
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// getOrCreateMetrics gets or creates the metrics for the task.
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// if the metrics has been created, the counter will be increased.
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func (m *taskMetricManager) getOrCreateMetrics(taskID int64) *metric.Common {
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m.Lock()
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defer m.Unlock()
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tm, ok := m.metricsMap[taskID]
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if !ok {
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metrics := tidbmetrics.GetRegisteredImportMetrics(promutil.NewDefaultFactory(),
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prometheus.Labels{
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proto.TaskIDLabelName: strconv.FormatInt(taskID, 10),
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})
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tm = &taskMetrics{
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metrics: metrics,
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}
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m.metricsMap[taskID] = tm
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}
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tm.counter++
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return tm.metrics
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}
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// unregister count down the metrics for the task.
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// if the counter is 0, the metrics will be unregistered.
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func (m *taskMetricManager) unregister(taskID int64) {
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m.Lock()
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defer m.Unlock()
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if tm, ok := m.metricsMap[taskID]; ok {
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tm.counter--
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if tm.counter == 0 {
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tidbmetrics.UnregisterImportMetrics(tm.metrics)
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delete(m.metricsMap, taskID)
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}
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}
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}
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