THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
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MDC
...
logging
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Available
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as
...
of
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Camel
...
2.7
...
In
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Camel
...
2.7
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we
...
migrated
...
to
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use
...
...
as
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the
...
logging
...
framework
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in
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Camel.
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This
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allows
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us
...
to
...
support
...
...
logging.
See more details about MDC logging in the logback manual.
The log kit in use must support MDC, such as:
See the log kit documentation how to configure and use MDC.
Enabling in Camel
To enable MDC logging in Camel you can do it as follows:
| Code Block |
|---|
|http://www.slf4j.org/api/org/slf4j/MDC.html]. See more details about MDC logging in the [logback manual|http://logback.qos.ch/manual/mdc.html]. The log kit in use must support MDC, such as: - [log4j|http://logging.apache.org/log4j/1.2/] - [logback|http://logback.qos.ch/] - [pax logging|http://wiki.ops4j.org/display/paxlogging/Pax+Logging] See the log kit documentation how to configure and use MDC. h3. Enabling in Camel To enable MDC logging in Camel you can do it as follows: {code} CamelContext context = ... context.setUseMDCLogging(true); ... {code} |
In
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XML
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you
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enable
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it
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using
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the
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useMDCLogging
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attribute
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as
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follows:
| Code Block | ||||
|---|---|---|---|---|
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{code:xml} <camelContext xmlns="http://camel.apache.org/schema/spring" useMDCLogging="true"> ... </camelContext> {code} h3. MDC information Camel provides the following context information available for MDC: h4. Camel |
MDC information
Camel provides the following context information available for MDC:
Camel 2.9.x
...
or older
| Wiki Markup |
|---|
older {div:class=confluenceTableSmall} || Key || Description || | {{exchangeId}} | The exchange id | | {{messageId}} | *Camel 2.9.1:* The message id | | {{correlationId}} | The correlation id of the exchange if it's correlated. For example a sub message from the [Splitter] EIP | | {{transactionKey}} | The id of the transaction for transacted exchanges. Note the id is not unique, but its the id of the transaction template that marks the transaction boundary for the given transaction. Hence we decided to name the key {{transactionKey}} and not {{transactionID}} to point out this fact. | | {{routeId}} | The id of the route, in which the exchange is currently being routed | | {{breadcrumbId}} | *Camel 2.8:* An unique id used for tracking messages across transports. | | {{camelContextId}} | *Camel 2.8.3/2.9:* the camel context id used for tracking the message from different camel context. | {div} h4. |
Camel
...
2.10 onwards
| Wiki Markup |
|---|
onwards {div:class=confluenceTableSmall} || Key || Description || | {{camel.exchangeId}} | The exchange id | | {{camel.messageId}} | The message id | | {{camel.correlationId}} | The correlation id of the exchange if it's correlated. For example a sub message from the [Splitter] EIP | | {{camel.transactionKey}} | The id of the transaction for transacted exchanges. Note the id is not unique, but its the id of the transaction template that marks the transaction boundary for the given transaction. Hence we decided to name the key {{transactionKey}} and not {{transactionID}} to point out this fact. | | {{camel.routeId}} | The id of the route, in which the exchange is currently being routed | | {{camel.breadcrumbId}} | An unique id used for tracking messages across transports. | | {{camel.contextId}} | The camel context id used for tracking the message from different camel context. | {div} |
The
...
keys
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are
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subject
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to
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change
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as
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we
...
want
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to
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align
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and
...
leverage
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MDC
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across
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other
...
Apache
...
products
...
such
...
as
...
...
,
...
...
and
...
Example using log4j
If you use log4j you can configure MDC in the log4j.properties file as shown:
| Code Block |
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|http://karaf.apache.org/]. h3. Example using log4j If you use log4j you can configure MDC in the log4j.properties file as shown: {code} log4j.appender.out.layout.ConversionPattern=%d [%-15.15t] %-5p %-30.30c{1} - %-10.10X{camel.exchangeId} - %-10.10X{camel.routeId} - %m%n {code} |
Camel
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will
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log
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on
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startup
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if
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MDC
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is
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enabled
...
or
...
not
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|---|
} INFO SpringCamelContext - - - MDC logging is enabled on CamelContext: camel-1 {code} |
The
...
follow
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snippet
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is
...
from
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an
...
unit
...
test
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which
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shows
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MDC
...
in
...
use.
...
Notice
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the
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exchange
...
id
...
and
...
route
...
id
...
is
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displayed
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in
...
their
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respective
...
columns
...
in
...
the
...
log
...
file:
| Code Block |
|---|
} INFO SpringCamelContext - - - Apache Camel (CamelContext: camel-1) started in 1.228 seconds INFO foo - 358739-0-2 - route-a - Exchange[ExchangePattern:InOnly, BodyType:String, Body:Hello World] INFO bar - 358739-0-2 - route-b - Exchange[ExchangePattern:InOnly, BodyType:String, Body:Hello World] INFO MockEndpoint - - - Asserting: Endpoint[mock://result] is satisfied {code} h3. Using breadcrumb *Available as of Camel |
Using breadcrumb
Available as of Camel 2.8
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The
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breadcrumbId
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key
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for
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MDC
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logging
...
is
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only
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available
...
if
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useBreadcrumb
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option
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has
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been
...
enabled
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on
...
...
(its
...
default
...
enabled).
...
When
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enabled
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Camel
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will
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enrich
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the
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Camel
...
...
by
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adding
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a
...
header
...
to
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it
...
with
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the
...
key
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breadcrumbId
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containing
...
the
...
id.
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Camel
...
will
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use
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the
...
messageId
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if
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no
...
existing
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breadcrumbId
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was
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found
...
in
...
the
...
message.
...
By
...
storing
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the
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breadcrumb
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as
...
a
...
header
...
allow
...
us
...
to
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transport
...
the
...
breadcrumb
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across
...
transports
...
which
...
supports
...
message
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body
...
and
...
headers.
...
For
...
example
...
...
and
...
...
and
...
many
...
other
...
transports
...
does
...
that.
...
If
...
you
...
want
...
to
...
disable
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breadcrumb
...
you
...
do
...
as
...
follows
...
in
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Java
| Code Block |
|---|
} CamelContext context = ... context.setUseBreadcrumb(false); ... {code} |
And
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in
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XML
...
DSL
| Code Block | ||||
|---|---|---|---|---|
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{code:xml} <camelContext xmlns="http://camel.apache.org/schema/spring" useBreadcrumb="false"> ... </camelContext> {code} |