Backends
This section presents all the existing Backend classes that you can use in your program, followed by their parameters.
StdoutBackend
Description
Used to emit log records to the standard output.
Parameters
Option |
Description |
Default value |
|---|---|---|
LogLevel |
log level of the backend: will only accept logs above this level |
‘DEBUG’ |
StderrBackend
Description
Used to emit log records to the standard error output.
Parameters
Option |
Description |
Default value |
|---|---|---|
LogLevel |
log level of the backend: will only accept logs above this level |
‘DEBUG’ |
FileBackend
Description
Used to emit log records in a specific file.
Parameters
Option |
Description |
Default value |
|---|---|---|
FileName |
name of the file where the log records must be sent |
Dirac-log_[pid].log |
LogLevel |
log level of the backend: will only accept logs above this level |
‘DEBUG’ |
ElasticSearchBackend
Description
Used to emit log records in the an ElasticSearch database. The Backend acccepts logs from Debug to Always level.
Parameters
Option |
Description |
Default value |
|---|---|---|
Host |
host machine where the ElasticSearch DB is installed |
‘’ |
Port |
port where the ElasticSearch DB listen |
9203 |
User |
username of the ElasticSearch DB (optional) |
None |
Password |
password of the ElasticSearch DB (optional) |
None |
Index |
ElasticSearch index |
‘’ |
BufferSize |
maximum size of the buffer before sending |
1000 |
FlushTime |
maximum waiting time in seconds before sending |
1 |
LogLevel |
log level of the backend: will only accept logs above this level |
‘DEBUG’ |
MessageQueueBackend
Description
Used to emit log records in a MessageQueue server using Stomp protocol. The Backend acccepts logs from Verbose to Always level, and this cannot be changed.
Parameters
Option |
Description |
Default value |
|---|---|---|
MsgQueue |
MessageQueueRessources from DIRAC |
‘’ |
LogLevel |
log level of the backend: will only accept logs above this level |
‘VERBOSE’ |
MsgQueue represents a MessageQueue resources from DIRAC under this form:
mardirac3.in2p3.fr::Queues::TestQueue
You will find more details about these resources in the Message Queues section.