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new 7ef97ad Adding a sample to topicIsPattern consuming option (#5821)
7ef97ad is described below
commit 7ef97add9e80005162467beb9b2081ff0e982fd4
Author: Marcelo Avancini <marcelo.a...@gmail.com>
AuthorDate: Fri Jul 9 15:05:57 2021 -0300
Adding a sample to topicIsPattern consuming option (#5821)
---
components/camel-kafka/src/main/docs/kafka-component.adoc | 14 +++++++++++++-
1 file changed, 13 insertions(+), 1 deletion(-)
diff --git a/components/camel-kafka/src/main/docs/kafka-component.adoc
b/components/camel-kafka/src/main/docs/kafka-component.adoc
index 940e9b7..92fd0db 100644
--- a/components/camel-kafka/src/main/docs/kafka-component.adoc
+++ b/components/camel-kafka/src/main/docs/kafka-component.adoc
@@ -368,7 +368,7 @@ from("kafka:test?brokers=localhost:9092")
.log(" with the key ${headers[kafka.KEY]}")
----
-If you need to consume messages from multiple topics you can use a comma
separated list of topic names
+If you need to consume messages from multiple topics you can use a comma
separated list of topic names.
[source,java]
----
@@ -380,6 +380,18 @@ from("kafka:test,test1,test2?brokers=localhost:9092")
.log(" with the key ${headers[kafka.KEY]}")
----
+It's also possible to subscribe to multiple topics giving a pattern as the
topic name and using the `topicIsPattern` option.
+
+[source,java]
+----
+from("kafka:test*?brokers=localhost:9092&topicIsPattern=true")
+ .log("Message received from Kafka : ${body}")
+ .log(" on the topic ${headers[kafka.TOPIC]}")
+ .log(" on the partition ${headers[kafka.PARTITION]}")
+ .log(" with the offset ${headers[kafka.OFFSET]}")
+ .log(" with the key ${headers[kafka.KEY]}")
+----
+
When consuming messages from Kafka you can use your own offset management and
not delegate this management to Kafka.
In order to keep the offsets the component needs a `StateRepository`
implementation such as `FileStateRepository`.
This bean should be available in the registry.
