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About This Document
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It isn't the aim of this document to reiterate Best Practices, so advice here is general:
- Use a logger logging facade such as SLF4J or EELF.
- Write log messages in English.
- Write meaningful messages. Consider what will be useful to consumers of logger output.
- Log at the appropriate level. Be aware of the volume of logs that will be produced.
- Safeguard the information in exceptions, and ensure it is never lost.
- Use errorcodes to characterise exceptions.
- Log in a machine-readable format. See Conventions.
- Log for analytics as well as troubleshooting.
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Note there are 3 tabs (see p_mak in logback.xml) delimiting the MARKERS (ENTRY and EXIT) at the end of each line
<property name="p_mak" value="%replace(%replace(%marker){'\t', '\\\\t'}){'\n','\\\\n'}"/>| Code Block | ||||
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2018-07-05T20:21:34.794Z http-nio-8080-exec-2 INFO org.onap.demo.logging.ApplicationService InstanceID=ede7dd52-91e8-45ce-9406-fbafd17a7d4c, RequestID=f9d8bb0f-4b4b-4700-9853-d3b79d861c5b, ServiceName=/logging-demo/rest/health/health, InvocationID=8f4c1f1d-5b32-4981-b658-e5992f28e6c8, InvokeTimestamp=2018-07-05T20:21:26.617Z, PartnerName=, ClientIPAddress=0:0:0:0:0:0:0:1, ServerFQDN=localhost ENTRY 2018-07-05T20:22:09.268Z http-nio-8080-exec-2 INFO org.onap.demo.logging.ApplicationService ResponseCode=, InstanceID=ede7dd52-91e8-45ce-9406-fbafd17a7d4c, RequestID=f9d8bb0f-4b4b-4700-9853-d3b79d861c5b, ServiceName=/logging-demo/rest/health/health, ResponseDescription=, InvocationID=8f4c1f1d-5b32-4981-b658-e5992f28e6c8, Severity=, InvokeTimestamp=2018-07-05T20:21:26.617Z, PartnerName=, ClientIPAddress=0:0:0:0:0:0:0:1, ServerFQDN=localhost, StatusCode= EXIT |
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