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CAMEL-20410: documentation fixes for camel-jms #13097

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Feb 13, 2024
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CAMEL-20410: documentation fixes for camel-jms #13097

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32 changes: 17 additions & 15 deletions components/camel-jms/src/main/docs/jms-component.adoc
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Original file line number Diff line number Diff line change
Expand Up @@ -39,7 +39,7 @@ for this component:

If you are using http://activemq.apache.org/[Apache ActiveMQ], you
should prefer the ActiveMQ component as it has been
optimized for ActiveMQ. All of the options and
optimized for ActiveMQ. All the options and
samples on this page are also valid for the ActiveMQ
component.
====
Expand Down Expand Up @@ -132,7 +132,13 @@ level accordingly to:
So you can say the default setting is conservative. Consider using
`cacheLevelName=CACHE_CONSUMER` if you are using non-XA transactions.

=== Durable Subscriptions with JMS 1.1
=== Durable Subscriptions

==== Durable Subscriptions with JMS 2.0

If you wish to use durable topic subscriptions, you need to specify the `durableSubscriptionName`.

==== Durable Subscriptions with JMS 1.1

If you wish to use durable topic subscriptions, you need to specify both
`clientId` and `durableSubscriptionName`. The value of the `clientId`
Expand All @@ -150,10 +156,6 @@ or for https://activemq.apache.org/virtual-destinations.html[ActiveMQ Classic] f
You can find more details about durable messaging for ActiveMQ Classic http://activemq.apache.org/how-do-durable-queues-and-topics-work.html[here].
====

==== Durable Subscriptions with JMS 2.0

If you wish to use durable topic subscriptions, you need to specify the `durableSubscriptionName`.

=== Message Header Mapping

When using message headers, the JMS specification states that header
Expand Down Expand Up @@ -426,7 +428,7 @@ The possible values are defined in the `enum` class,

== Message format when sending

The exchange that is sent over the JMS wire must conform to the
The exchange sent over the JMS wire must conform to the
http://java.sun.com/j2ee/1.4/docs/api/javax/jms/Message.html[JMS Message
spec].

Expand Down Expand Up @@ -510,7 +512,7 @@ documentation] for further details.
== About using Camel to send and receive messages and JMSReplyTo

The JMS component is complex, and you have to pay close attention to how
it works in some cases. So this is a short summary of some of the
it works in some cases. So this is a short summary of some
areas/pitfalls to look for.

When Camel sends a message using its `JMSProducer`, it checks the
Expand Down Expand Up @@ -632,7 +634,7 @@ If both the `CamelJmsDestination` and the `CamelJmsDestinationName`
headers are set, `CamelJmsDestination` takes priority. Keep in mind that
the JMS producer removes both `CamelJmsDestination` and
`CamelJmsDestinationName` headers from the exchange and do not propagate
them to the created JMS message in order to avoid the accidental loops
them to the created JMS message to avoid the accidental loops
in the routes (in scenarios when the message will be forwarded to
another JMS endpoint).

Expand All @@ -641,7 +643,7 @@ another JMS endpoint).
You can configure your JMS provider in Spring XML as
follows:

Basically, you can configure as many JMS component instances as you wish
You can configure as many JMS component instances as you wish
and give them *a unique name using the* `id` **attribute**. The
preceding example configures an `activemq` component. You could do the
same to configure MQSeries, TibCo, BEA, Sonic and so on.
Expand Down Expand Up @@ -681,7 +683,7 @@ JNDI lookup.
== Concurrent Consuming

A common requirement with JMS is to consume messages concurrently in
multiple threads in order to make an application more responsive. You
multiple threads to make an application more responsive. You
can set the `concurrentConsumers` option to specify the number of
threads servicing the JMS endpoint, as follows:

Expand Down Expand Up @@ -785,8 +787,8 @@ fixed reply queue (see more below about fixed reply queue).
Camel will automatically set up a consumer that listens to on the reply queue,
so you should *not* do anything. +
This consumer is a Spring `DefaultMessageListenerContainer` which
listen for replies. However, it's fixed to 1 concurrent consumer. +
That means replies will be processed in sequence as there is only 1
listen for replies. However, it's fixed to one concurrent consumer. +
That means replies will be processed in sequence as there is only one
thread to process the replies. You can configure the listener to use
concurrent threads using the `concurrentConsumers` and
`maxConcurrentConsumers` options. This allows you to easier configure
Expand All @@ -801,7 +803,7 @@ from(xxx)
-------------------------------------------------------

In this route, we instruct Camel to route replies
asynchronously using a thread pool with 5 threads.
asynchronously using a thread pool with five threads.

=== Request-reply over JMS and using a shared fixed reply queue

Expand Down Expand Up @@ -1061,7 +1063,7 @@ we wait for a return reply:

When sending to a xref:jms-component.adoc[JMS] destination using *camel-jms*, the
producer will use the MEP to detect if its _InOnly_ or _InOut_ messaging.
However, there can be times where you want to send an _InOnly_ message but
However, there can be times when you want to send an _InOnly_ message but
keeping the `JMSReplyTo` header. To do so, you have to instruct Camel to
keep it, otherwise the `JMSReplyTo` header will be dropped.

Expand Down
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