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  • MDC Logging
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ActiveMQ uses slf4j as its logging framework. This allows ActiveMQ to support MDC logging. For more information about about MDC logging see the logback manual.

Currently ActiveMQ adds three keys to the diagnostic context:

Key

Description

activemq.broker

Name of the broker logging event.

activemq.connector

Address of the connector which is serving the request.

activemq.destination

Name of the target destination of a message.

For example, if you've defined a log appender to use the following ConversionPattern:

log4j.appender.stdout.layout.ConversionPattern=%d [%-15.15t] - %-5p %-30.30c{1} - %-10.10X{activemq.broker} %-20.20X{activemq.connector} %-20.20X{activemq.destination} - %m%n

then in an environment where multiple brokers use the same log (like unit tests), the log output will take this general form:

2011-03-23 13:51:04,919 [127.0.0.1:58146] - TRACE Queue                          - broker-3B  tcp://localhost:6111                      - Message ID:dejan-bosanacs-macbook-pro....
2011-03-23 13:51:04,935 [oker-3B] Task-1] - DEBUG Queue                          - broker-3B  tcp://localhost:6111 PROD.FUSESOURCE.3.B  - PROD.FUSESOURCE.3.B toPageIn: 1, Inflight...
2011-03-23 13:51:04,763 [oker-2A] Task-1] - TRACE AbstractStoreCursor            - broker-2A  vm://broker-2A       PROD.FUSESOURCE.3.B  - QueueStorePrefetch611939300 - fillBatch
2011-03-23 13:51:04,759 [127.0.0.1:58118] - TRACE Queue                          - broker-3A  tcp://localhost:6110                      - Message ID:dejan-bosanacs-macbook-pro.l...
2011-03-23 13:51:04,937 [oker-2A] Task-1] - TRACE NetworkBridgeFilter            - broker-2A  vm://broker-2A       PROD.FUSESOURCE.3.B  - Message all ready routed once through t...
2011-03-23 13:51:04,936 [oker-3B] Task-1] - TRACE AbstractStoreCursor            - broker-3B  tcp://localhost:6111 PROD.FUSESOURCE.3.B  - QueueStorePrefetch2047424752 - fillBatch
2011-03-23 13:51:04,941 [oker-2A] Task-2] - DEBUG DemandForwardingBridgeSupport  - broker-2A                                            - bridging (broker-2A -> broker-1B, consu...

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