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monitoring.go
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monitoring.go
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// Copyright (C) MongoDB, Inc. 2017-present.
//
// 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
package event
import (
"context"
"time"
"github.com/mongodb/mongo-go-driver/bson"
)
// CommandMetadata contains metadata about a command sent to the server.
type CommandMetadata struct {
Name string
Time time.Time
}
// CreateMetadata creates metadata for a command.
func CreateMetadata(name string) *CommandMetadata {
return &CommandMetadata{
Name: name,
Time: time.Now(),
}
}
// TimeDifference returns the difference between now and the time a command was sent in nanoseconds.
func (cm *CommandMetadata) TimeDifference() int64 {
t := time.Now()
duration := t.Sub(cm.Time)
return duration.Nanoseconds()
}
// CommandStartedEvent represents an event generated when a command is sent to a server.
type CommandStartedEvent struct {
Command *bson.Document
DatabaseName string
CommandName string
RequestID int64
ConnectionID string
}
// CommandFinishedEvent represents a generic command finishing.
type CommandFinishedEvent struct {
DurationNanos int64
CommandName string
RequestID int64
ConnectionID string
}
// CommandSucceededEvent represents an event generated when a command's execution succeeds.
type CommandSucceededEvent struct {
CommandFinishedEvent
Reply *bson.Document
}
// CommandFailedEvent represents an event generated when a command's execution fails.
type CommandFailedEvent struct {
CommandFinishedEvent
Failure string
}
// CommandMonitor represents a monitor that is triggered for different events.
type CommandMonitor struct {
Started func(context.Context, *CommandStartedEvent)
Succeeded func(context.Context, *CommandSucceededEvent)
Failed func(context.Context, *CommandFailedEvent)
}