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cwlogs.go
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cwlogs.go
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package aws
import (
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/session"
"github.com/aws/aws-sdk-go/service/cloudwatchlogs"
"github.com/aws/aws-sdk-go/service/cloudwatchlogs/cloudwatchlogsiface"
"github.com/stelligent/mu/common"
"time"
)
type logsManager struct {
logsAPI cloudwatchlogsiface.CloudWatchLogsAPI
}
func newLogsManager(sess *session.Session) (common.LogsManager, error) {
log.Debug("Connecting to CloudWatch Logs service")
logsAPI := cloudwatchlogs.New(sess)
return &logsManager{
logsAPI: logsAPI,
}, nil
}
// ViewLogs view the logs in CW
func (logsMgr *logsManager) ViewLogs(logGroup string, searchDuration time.Duration, follow bool, filter string, callback func(string, string, int64)) error {
logsAPI := logsMgr.logsAPI
startTime := time.Now().Add(-searchDuration).Unix() * 1000
for {
log.Debugf("Searching for logs in log_group '%s' after time '%d' and filter '%s'", logGroup, startTime, filter)
params := &cloudwatchlogs.FilterLogEventsInput{
StartTime: aws.Int64(startTime + 1),
Interleaved: aws.Bool(true),
LogGroupName: aws.String(logGroup),
FilterPattern: aws.String(filter),
}
err := logsAPI.FilterLogEventsPages(params,
func(page *cloudwatchlogs.FilterLogEventsOutput, lastPage bool) bool {
for _, event := range page.Events {
ts := aws.Int64Value(event.Timestamp)
if ts > startTime {
startTime = ts
}
callback(aws.StringValue(event.LogStreamName), aws.StringValue(event.Message), ts)
}
return true
})
if err != nil {
return err
}
if !follow {
break
}
time.Sleep(5 * time.Second)
}
return nil
}