/
servicebushealthcheck.go
166 lines (134 loc) · 4.11 KB
/
servicebushealthcheck.go
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package diagnostics
import (
"context"
"errors"
"fmt"
"time"
"github.com/Azure/azure-sdk-for-go/sdk/azidentity"
"github.com/Azure/azure-sdk-for-go/sdk/messaging/azservicebus"
log "github.com/sirupsen/logrus"
)
const HealthCheckQueueName = "healthcheck"
type ServiceBusHealthCheckOptions struct {
Timeout time.Duration
QueueName string
FullyQualifiedNamespace string
}
type serviceBusHealthCheck struct {
options *ServiceBusHealthCheckOptions
sendResult HealthCheckResult
receiveResult HealthCheckResult
}
// Check whether the url is accessible
func (c *serviceBusHealthCheck) Check(ctx context.Context) HealthCheckResult {
threshold := time.Now().Add(c.options.Timeout)
for {
if time.Now().After(threshold) {
result := HealthCheckResult{
Description: fmt.Sprintf("Timeout exceeded while connecting to service bus %s", c.options.FullyQualifiedNamespace),
Status: HealthCheckStatusUnhealthy,
Error: errors.New("timeout exceeded while waiting for connectivity to service"),
}
log.Warnf("Health Check timed out: %v", result)
return result
}
result := c.getResult(ctx)
if result.Status != HealthCheckStatusHealthy || result.Error != nil {
log.Warnf("Health Check attempt failed: %v", result)
time.Sleep(10 * time.Second)
continue
}
return result
}
}
func (c *serviceBusHealthCheck) getResult(ctx context.Context) HealthCheckResult {
err := c.checkSend(ctx)
if err != nil {
return HealthCheckResult{
Description: fmt.Sprintf("Failed to send message to queue %s", c.options.QueueName),
Status: HealthCheckStatusUnhealthy,
Error: err,
}
}
err = c.checkReceiver(ctx)
if err != nil {
return HealthCheckResult{
Description: fmt.Sprintf("Failed to receive message from queue %s", c.options.QueueName),
Status: HealthCheckStatusUnhealthy,
Error: err,
}
}
if c.sendResult.Status == HealthCheckStatusHealthy && c.receiveResult.Status == HealthCheckStatusHealthy {
return HealthCheckResult{
Description: fmt.Sprintf("Successfully connected to queue %s", c.options.QueueName),
Status: HealthCheckStatusHealthy,
}
}
return HealthCheckResult{
Description: fmt.Sprintf("Failed to connect to queue %s", c.options.QueueName),
Status: HealthCheckStatusUnhealthy,
Error: errors.New("failed to connect to queue"),
}
}
func (c *serviceBusHealthCheck) checkSend(ctx context.Context) error {
if c.sendResult.Status == HealthCheckStatusHealthy {
return nil
}
client, err := c.getServiceBusClient(ctx)
if err != nil {
return err
}
sender, err := client.NewSender(c.options.QueueName, nil)
if err != nil {
return err
}
defer sender.Close(ctx)
err = sender.SendMessage(ctx, &azservicebus.Message{
Body: []byte("test"),
}, nil)
if err == nil {
c.sendResult = HealthCheckResult{
Description: fmt.Sprintf("Successfully sent message to queue %s", c.options.QueueName),
Status: HealthCheckStatusHealthy,
}
log.Info(c.sendResult.Description)
}
return err
}
func (c *serviceBusHealthCheck) checkReceiver(ctx context.Context) error {
if c.receiveResult.Status == HealthCheckStatusHealthy {
return nil
}
client, err := c.getServiceBusClient(ctx)
if err != nil {
return err
}
receiver, err := client.NewReceiverForQueue(c.options.QueueName, nil)
if err != nil {
return err
}
defer receiver.Close(ctx)
_, err = receiver.ReceiveMessages(ctx, 100, nil)
if err != nil {
return err
} else {
c.receiveResult = HealthCheckResult{
Description: fmt.Sprintf("Successfully received message from queue %s", c.options.QueueName),
Status: HealthCheckStatusHealthy,
}
log.Info(c.receiveResult.Description)
}
return nil
}
func (c *serviceBusHealthCheck) getServiceBusClient(ctx context.Context) (*azservicebus.Client, error) {
credential, err := azidentity.NewDefaultAzureCredential(nil)
if err != nil {
return nil, err
}
return azservicebus.NewClient(c.options.FullyQualifiedNamespace, credential, nil)
}
func NewServiceBusHealthCheck(options ServiceBusHealthCheckOptions) HealthCheck {
return &serviceBusHealthCheck{
options: &options,
}
}