I checked Chirag's updated example which contains RouteConfiguration as XML
and it worked.
Then I wondered what's the difference between Chirag's and my approach. It
turned out that the code is basically the same, but there was a difference
in used dependencies. Chirag's project uses:
<dependency>
<groupId>org.apache.camel</groupId>
<artifactId>camel-xml-io-dsl</artifactId>
</dependency>
While my project uses:
<dependency>
<groupId>org.apache.camel</groupId>
<artifactId>camel-xml-jaxb-dsl</artifactId>
</dependency>
When I switched to "camel-xml-io-dsl" it also worked on my project.
I did however find this rather strange as:
1) The documentation says: "The route configuration is supported by all
DSL’s, so useable by: Java, XML, Groovy, Kotlin and so forth." (
https://camel.apache.org/manual/route-configuration.html#_route_configuration_in_xml).
The JAXB did work for a normal route, only not for associating the
routeConfiguration (I gave no error on loading).
2) The IO-DSL seems just a newer/faster way to load XML's (based on
http://www.davsclaus.com/2020/03/apache-camel-31-fast-loading-of-xml.html),
but that the working is the same.
3) On the Camel documentation page "https://camel.apache.org/manual/dsl.html";
there is a link only to IO-XML but nothing said about the JAXB. There is
also a page (
https://camel.apache.org/components/next/others/java-xml-jaxb-dsl.html),
but there it says nothing about the status or that it's deprecated. I
already reported (https://issues.apache.org/jira/browse/CAMEL-17842) that
the documentation isn't clear on using the XML DSL.
I can recall that I tried the XML-IO-DSL before, but somehow I needed to
switch back to JAXB (I can't remember why, however...). I leave this ticket
open and let the Dev Team decide what to do with it. (
https://issues.apache.org/jira/browse/CAMEL-17953).
Raymond
On Wed, Apr 13, 2022 at 8:53 PM Chirag <chirag.sangh...@gmail.com> wrote:
> while performing XML route, route needs to be explicitly associated
> with configuration to use it.
>
> <route routeConfigurationId="xmlError">
>
> Example on
> https://camel.apache.org/manual/route-configuration.html#_route_configuration_in_xml
> works.
>
> I think the gap is - when defining a framework based on camel - how to
> associate specific routeconfigurations to all routes.
>
> ચિરાગ/चिराग/Chirag
> ------------------------------------------
> Sent from My Gmail Account
>
> On Wed, Apr 13, 2022 at 3:27 AM ski n <raymondmees...@gmail.com> wrote:
> >
> > I also created an issue for this with an example:
> > https://issues.apache.org/jira/browse/CAMEL-17953
> >
> >
> > On Wed, Apr 13, 2022 at 9:25 AM ski n <raymondmees...@gmail.com> wrote:
> >
> > > Yes, based on the link Claus send:
> > >
> > > https://camel.apache.org/manual/route-configuration.html
> > >
> > > There is an example of how to do it in Java and how to add it to the
> > > CamelContext. There is also an example of how to do it with XML:
> > >
> > > <routeConfiguration id="xmlError">
> > > <onException>
> > > <exception>java.lang.Exception</exception>
> > > <handled><constant>true</constant></handled>
> > > <log message="XML WARN: ${exception.message}"/>
> > > </onException></routeConfiguration>
> > >
> > >
> > > But there is nothing about how to add this to the CamelContext. I
> assumed
> > > I need to do this through the RoutesLoader (the same as a normal
> route).
> > > Note I add routes as String to the RoutesLoader. However this doesn't
> seem
> > > to work.
> > >
> > > Raymond
> > >
> > >
> > >
> > > On Tue, Apr 12, 2022 at 11:38 PM Chirag <chirag.sangh...@gmail.com>
> wrote:
> > >
> > >> Raymond,
> > >>
> > >> to summarise:
> > >> You want to load route configuration using XML?
> > >>
> > >> ચિરાગ/चिराग/Chirag
> > >> ------------------------------------------
> > >> Sent from My Gmail Account
> > >>
> > >> On Tue, Apr 12, 2022 at 7:59 AM ski n <raymondmees...@gmail.com>
> wrote:
> > >> >
> > >> > Loading the routeconfiguration through:
> > >> >
> > >> > loader.loadRoutes(resource);
> > >> >
> > >> > also doesn't work. Directly from Java is no problem. Is this a bug
> or
> > >> > should the XML RouteConfiguration loaded differently?
> > >> >
> > >> > Raymond
> > >> >
> > >> > On Mon, Apr 11, 2022 at 10:26 PM ski n <raymondmees...@gmail.com>
> > >> wrote:
> > >> >
> > >> > > As a note:
> > >> > >
> > >> > > When when using the routeConfiguration from Java and load it:
> > >> > >
> > >> > > public class MyJavaErrorHandler extends RouteConfigurationBuilder
> {
> > >> > >
> > >> > > @Override
> > >> > > public void configuration() throws Exception {
> > >> > > routeConfiguration("xmlError")
> > >> > > .onException(Exception.class).handled(true)
> > >> > > .log("Java WARN: ${exception.message}");
> > >> > > }
> > >> > > }
> > >> > >
> > >> > > context.addRoutes(new MyJavaErrorHandler());
> > >> > >
> > >> > > then it works as expected. Thus, it must be because of the way the
> > >> > > routeconfiguration was loaded. I loaded it using:
> > >> > >
> > >> > > loader.updateRoutes(resource);
> > >> > >
> > >> > > I assumed it worked similar to the old "addOrUpdateXml" method as
> it
> > >> says
> > >> > >
> > >> > > "Loads or updates existing RoutesBuilder". However it works
> > >> differently
> > >> > > (at least for RouteConfiguration). When changing the
> > >> > > routeConfiguration to:
> > >> > >
> > >> > > loader.loadRoutes(resource);
> > >> > >
> > >> > > then it worked.
> > >> > >
> > >> > > Raymond
> > >> > >
> > >> > >
> > >> > >
> > >> > >
> > >> > >
> > >> > >
> > >> > >
> > >> > >
> > >> > >
> > >> > >
> > >> > >
> > >> > >
> > >> > > On Mon, Apr 11, 2022 at 9:13 PM ski n <raymondmees...@gmail.com>
> > >> wrote:
> > >> > >
> > >> > >> Yes, with the try-catch-finally clause one can have more
> > >> fine-grained.
> > >> > >> However, I am not the one who writes the routes. I am only
> loading
> > >> them.
> > >> > >> That's why I need a more generic behavior (errorHandler) with
> some
> > >> > >> configuration options (routeConfiguration).
> > >> > >>
> > >> > >> I assumed that the XML routeConfiguration can be loaded the same
> as a
> > >> > >> 'normal' xml route. I loaded the following:
> > >> > >>
> > >> > >> <routeConfiguration id="xmlError">
> > >> > >> <onException>
> > >> > >> <exception>java.lang.Exception</exception>
> > >> > >> <handled><constant>true</constant></handled>
> > >> > >> <log message="XML WARN: ${exception.message}"/>
> > >> > >> </onException></routeConfiguration>
> > >> > >>
> > >> > >> And then the route:
> > >> > >>
> > >> > >> <route routeConfigurationId="xmlError">
> > >> > >> <from uri="timer:xml?period=5s"/>
> > >> > >> <log message="I am XML"/>
> > >> > >> <throwException exceptionType="java.lang.Exception"
> > >> message="Some kind of XML error"/></route>
> > >> > >>
> > >> > >>
> > >> > >> I see the error thrown "Some kind of XML error", but I don't see
> it
> > >> > >> handled (for example the XML WARN message). Is there something
> that
> > >> I am
> > >> > >> missing?
> > >> > >>
> > >> > >> Raymond
> > >> > >>
> > >> > >>
> > >> > >>
> > >> > >>
> > >> > >>
> > >> > >> On Mon, Apr 11, 2022 at 6:06 PM Chirag <
> chirag.sangh...@gmail.com>
> > >> wrote:
> > >> > >>
> > >> > >>> You could wrap it using try/catch.
> > >> > >>>
> > >> > >>> See: https://camel.apache.org/manual/try-catch-finally.html
> > >> > >>>
> > >> > >>> My experience with it is - it depends on the endpoint involved
> to
> > >> > >>> throw exceptions and enter doCatch appropriately.
> > >> > >>>
> > >> > >>> ચિરાગ/चिराग/Chirag
> > >> > >>> ------------------------------------------
> > >> > >>> Sent from My Gmail Account
> > >> > >>>
> > >> > >>> On Mon, Apr 11, 2022 at 11:10 AM Claus Ibsen <
> claus.ib...@gmail.com
> > >> >
> > >> > >>> wrote:
> > >> > >>> >
> > >> > >>> > Hi
> > >> > >>> >
> > >> > >>> > See routes configuration
> > >> > >>> > https://camel.apache.org/manual/route-configuration.html
> > >> > >>> >
> > >> > >>> > On Mon, Apr 11, 2022 at 4:30 PM ski n <
> raymondmees...@gmail.com>
> > >> > >>> wrote:
> > >> > >>> > >
> > >> > >>> > > I am indeed using Camel 3 (Currently 3.14.2) and using
> Maven. I
> > >> just
> > >> > >>> use
> > >> > >>> > > plain Java (camel core), so I have a similar setup as your
> > >> example
> > >> > >>> (only
> > >> > >>> > > I'm using Java, instead of the application.properties to
> > >> configure
> > >> > >>> the
> > >> > >>> > > Camel context and its routes). Your example helped me to
> also
> > >> use
> > >> > >>> the Yaml
> > >> > >>> > > dsl.
> > >> > >>> > >
> > >> > >>> > > I am still wondering how to do proper
> errorHandling/onException
> > >> with
> > >> > >>> the
> > >> > >>> > > routesloader.
> > >> > >>> > >
> > >> > >>> > > I can set for example the errorHandler globally:
> > >> > >>> > >
> > >> > >>> > >
> extendedCamelContext.setErrorHandlerFactory(routeErrorHandler);
> > >> > >>> > >
> > >> > >>> > > But I rather set it per route / per exception (and best of
> all
> > >> from
> > >> > >>> the
> > >> > >>> > > xml/yaml files). Like it used to be done like this:
> > >> > >>> > >
> > >> > >>> > > <camelContext id="myCamelContext" xmlns="
> > >> > >>> > > http://camel.apache.org/schema/spring";>
> > >> > >>> > > <!-- Catch the authorization exception and set the
> Access
> > >> Denied
> > >> > >>> > > message back -->
> > >> > >>> > > <onException>
> > >> > >>> > >
> > >> > >>>
> <exception>org.apache.camel.CamelAuthorizationException</exception>
> > >> > >>> > > <handled>
> > >> > >>> > > <constant>true</constant>
> > >> > >>> > > </handled>
> > >> > >>> > > <transform>
> > >> > >>> > > <simple>Access Denied with the Policy of
> > >> > >>> ${exception.policyId}
> > >> > >>> > > !</simple>
> > >> > >>> > > </transform>
> > >> > >>> > > </onException>
> > >> > >>> > >
> > >> > >>> > > <route>
> > >> > >>> > > <from uri="servlet:user"/>
> > >> > >>> > > <!-- wrap the route in the policy which enforces
> security
> > >> > >>> check -->
> > >> > >>> > > <policy ref="user">
> > >> > >>> > > <transform>
> > >> > >>> > > <simple>Normal user can access this
> service</simple>
> > >> > >>> > > </transform>
> > >> > >>> > > </policy>
> > >> > >>> > > </route>
> > >> > >>> > >
> > >> > >>> > > <route>
> > >> > >>> > > <from uri="servlet:admin"/>
> > >> > >>> > > <!-- wrap the route in the policy which enforces
> security
> > >> > >>> check -->
> > >> > >>> > > <policy ref="admin">
> > >> > >>> > > <transform>
> > >> > >>> > > <simple>Call the admin operation OK</simple>
> > >> > >>> > > </transform>
> > >> > >>> > > </policy>
> > >> > >>> > > </route>
> > >> > >>> > >
> > >> > >>> > > </camelContext>
> > >> > >>> > >
> > >> > >>> > > But such files are not accepted by the routesLoader.
> > >> > >>> > >
> > >> > >>> > > I also tried setting the error handler on a specific route
> from
> > >> Java
> > >> > >>> like
> > >> > >>> > > this:
> > >> > >>> > >
> > >> > >>> > > Route route = context.getRoute(myRouteId);
> > >> > >>> > > route.setErrorHandlerFactory(routeErrorHandler);
> > >> > >>> > >
> > >> > >>> > > But that didn't change anything.
> > >> > >>> > >
> > >> > >>> > > Raymond
> > >> > >>> > >
> > >> > >>> > >
> > >> > >>> > >
> > >> > >>> > >
> > >> > >>> > >
> > >> > >>> > >
> > >> > >>> > >
> > >> > >>> > > On Mon, Apr 11, 2022 at 3:36 PM Chirag <
> > >> chirag.sangh...@gmail.com>
> > >> > >>> wrote:
> > >> > >>> > >
> > >> > >>> > > > Hello Raymond,
> > >> > >>> > > >
> > >> > >>> > > > Are you trying to use Camel 3 ?
> > >> > >>> > > > Would you use Maven or Gradle to build?
> > >> > >>> > > >
> > >> > >>> > > > Here is an example:
> > >> > >>> > > >
> > >> > >>>
> > >>
> https://github.com/chiragsanghavi/camel-experiments/tree/main/processor
> > >> > >>> > > > if this helps.
> > >> > >>> > > >
> > >> > >>> > > > This example was built to demonstrate a bug- but if you
> update
> > >> > >>> maven
> > >> > >>> > > > to use camel 3.1.5 - it should work.
> > >> > >>> > > > Only thing needed to support YAML is a change in pom.xml
> to
> > >> include
> > >> > >>> > > > yaml dsl and create yaml files and put them into "routes"
> > >> folder.
> > >> > >>> > > >
> > >> > >>> > > > <dependency>
> > >> > >>> > > > <groupId>org.apache.camel</groupId>
> > >> > >>> > > > <artifactId>camel-yaml-dsl</artifactId>
> > >> > >>> > > > </dependency>
> > >> > >>> > > >
> > >> > >>> > > >
> > >> > >>> > > >
> > >> > >>> > > > ચિરાગ/चिराग/Chirag
> > >> > >>> > > > ------------------------------------------
> > >> > >>> > > > Sent from My Gmail Account
> > >> > >>> > > >
> > >> > >>> > > > On Mon, Apr 11, 2022 at 6:15 AM ski n <
> > >> raymondmees...@gmail.com>
> > >> > >>> wrote:
> > >> > >>> > > > >
> > >> > >>> > > > > Hi All,
> > >> > >>> > > > >
> > >> > >>> > > > > I like to use the routesLoader (
> > >> > >>> > > > >
> > >> > >>> > > >
> > >> > >>>
> > >>
> https://javadoc.io/static/org.apache.camel/camel-api/3.16.0/org/apache/camel/spi/annotations/RoutesLoader.html
> > >> > >>> > > > > ).
> > >> > >>> > > > > I have some questions about how to properly use it.
> > >> > >>> > > > >
> > >> > >>> > > > > 1) Is there any documentation on how to use it? (At
> > >> > >>> > > > > https://camel.apache.org/manual/ or
> > >> > >>> > > > > https://camel.apache.org/components/next/index.html).
> > >> > >>> > > > >
> > >> > >>> > > > > 2) I could find some examples (
> > >> > >>> https://github.com/apache/camel-examples
> > >> > >>> > > > ),
> > >> > >>> > > > > there the routesloader example says:
> > >> > >>> > > > >
> > >> > >>> > > > > <!--
> > >> > >>> > > > > if you want to have multiple routes, you can either
> have
> > >> > >>> multiple
> > >> > >>> > > > files
> > >> > >>> > > > > with 1 <route> per file or
> > >> > >>> > > > > you can use <routes> as root tag, such as
> > >> > >>> > > > > <routes><route>...</route><route>...</route></routes>
> > >> > >>> > > > > -->
> > >> > >>> > > > >
> > >> > >>> > > > > <route>
> > >> > >>> > > > > <from uri="timer:xml?period=5s"/>
> > >> > >>> > > > > <log message="I am XML"/>
> > >> > >>> > > > > </route>
> > >> > >>> > > > >
> > >> > >>> > > > > These examples loads xml, can it also loads other DSL's?
> > >> (Like
> > >> > >>> yaml or
> > >> > >>> > > > > Java).
> > >> > >>> > > > >
> > >> > >>> > > > > 3) How to use OnException with the RouteLoader?
> > >> > >>> > > > >
> > >> > >>> > > > > I thought maybe like this
> > >> > >>> > > > >
> > >> > >>> > > > > <routes xmlns="http://camel.apache.org/schema/spring";>
> > >> > >>> > > > > <onException>
> > >> > >>> > > > > <exception>java.lang.Exception</exception>
> > >> > >>> > > > > <redeliveryPolicy maximumRedeliveries="0"
> > >> > >>> redeliveryDelay="5000"/>
> > >> > >>> > > > > <handled><constant>true</constant></handled>
> > >> > >>> > > > > <toD uri="file://some/directory"/>
> > >> > >>> > > > > </onException>
> > >> > >>> > > > > <route>
> > >> > >>> > > > > <from uri="timer:xml?period=5s"/>
> > >> > >>> > > > > <log message="I am XML"/>
> > >> > >>> > > > > </route>
> > >> > >>> > > > > </routes>
> > >> > >>> > > > >
> > >> > >>> > > > > But this gave me a nullpointer exception.
> > >> > >>> > > > >
> > >> > >>> > > > > 4) Load from string directly
> > >> > >>> > > > >
> > >> > >>> > > > > In Camel 2 you could load routes directly from string
> like
> > >> this:
> > >> > >>> > > > >
> > >> > >>> > > > > ManagedCamelContext managed =
> > >> > >>> > > > > context.getExtension(ManagedCamelContext.class);
> > >> > >>> > > > > managedContext = managed.getManagedCamelContext();
> > >> > >>> > > > > managedContext.addOrUpdateRoutesFromXml(routeAsString);
> > >> > >>> > > > >
> > >> > >>> > > > > In Camel 3 the "addOrUpdateRoutesFromXml" is depracated.
> > >> With
> > >> > >>> routeLoader
> > >> > >>> > > > > from string I do it like this:
> > >> > >>> > > > >
> > >> > >>> > > > > ExtendedCamelContext extendedCamelContext =
> > >> > >>> > > > > context.adapt(ExtendedCamelContext.class);
> > >> > >>> > > > > RoutesLoader loader =
> > >> extendedCamelContext.getRoutesLoader();
> > >> > >>> > > > > Resource resource = ResourceHelper.fromString("any.xml",
> > >> route);
> > >> > >>> > > > >
> > >> > >>> > > > > loader.updateRoutes(resource);
> > >> > >>> > > > >
> > >> > >>> > > > > Is this the only way in Camel 3, or is there also a
> specific
> > >> > >>> method to
> > >> > >>> > > > use
> > >> > >>> > > > > strings directly (and maybe only specify the DSL used)
> like:
> > >> > >>> > > > >
> > >> > >>> > > > > loader.updateRoutes(routeAsString, "xml");
> > >> > >>> > > > >
> > >> > >>> > > > >
> > >> > >>> > > > > Raymond
> > >> > >>> > > >
> > >> > >>> >
> > >> > >>> >
> > >> > >>> >
> > >> > >>> > --
> > >> > >>> > Claus Ibsen
> > >> > >>> > -----------------
> > >> > >>> > http://davsclaus.com @davsclaus
> > >> > >>> > Camel in Action 2: https://www.manning.com/ibsen2
> > >> > >>>
> > >> > >>
> > >>
> > >
>
