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davsclaus merged 1 commit into from
Apr 8, 2026
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Update message-history.adoc #22498

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31 changes: 31 additions & 0 deletions core/camel-core-engine/src/main/docs/modules/eips/pages/message-history.adoc
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Expand Up @@ -348,3 +348,34 @@ for (MessageHistory history : list) {
System.out.println("Routed at id: " + history.getNode().getId());
}
----

== Configuring MessageHistory format

The Message History format in Camel is controlled by `Java String.format` patterns stored as global options on the CamelContext.

The defaults are defined in https://github.com/apache/camel/blob/main/core/camel-support/src/main/java/org/apache/camel/support/MessageHelper.java[`MessageHelper.java`]:

[source,java]
----
private static final String MESSAGE_HISTORY_HEADER = "%-40s %-30s %-50s %-12s";
private static final String MESSAGE_HISTORY_OUTPUT = "%-40.40s %-30.30s %-50.50s %12.12s";
----

You can customize it using `application.properties`:

[source,properties]
----
camel.main.global-options[CamelMessageHistoryHeaderFormat] = %-40s %-30s %-120s %-12s
camel.main.global-options[CamelMessageHistoryOutputFormat] = %-40.40s %-30.30s %-290.290s %12.12s
----

If you want to configure the message format for a specific exchange, you can do it programmatically:

[source,java]
----
camelContext.getGlobalOptions().put(Exchange.MESSAGE_HISTORY_HEADER_FORMAT,
"%-40s %-30s %-120s %-12s");

camelContext.getGlobalOptions().put(Exchange.MESSAGE_HISTORY_OUTPUT_FORMAT,
"%-40.40s %-30.30s %-120.120s %12.12s");
----
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