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https://issues.apache.org/jira/browse/CAMEL-23652?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18098827#comment-18098827
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Raymond commented on CAMEL-23652:
---------------------------------
Note that with variable and the extended Simple language it's easy to do this
without beans:
{code:java}
template:
from:
uri: timer:counter
parameters:
period: "{{period}}"
repeatCount: "{{?numbers}}"
steps:
- choice:
when:
- simple: "${variable.route:counter} == null"
steps:
- setVariable:
name: route:counter
simple:
expression: "{{start}}"
resultType: java.lang.Integer
otherwise:
steps:
- setVariable:
name: route:counter
simple:
expression: "${variable.route:counter}++"
resultType: java.lang.Integer
- setBody:
simple: "${variable.route:counter}"
- setHeader:
name: "Content-Type"
constant: "text/plain" {code}
Note 2:
The code in note 1 works flawlessly, however I first did it like this:
{code:java}
template:
from:
uri: timer:counter
parameters:
period: "{{period}}"
repeatCount: "{{?numbers}}"
steps:
- choice:
when:
- simple: "${variable.route:counter} == null"
steps:
- setVariable:
name: route:counter
simple:
expression: "{{start}}"
resultType: java.lang.Integer
otherwise:
steps:
- setVariable:
name: route:counter
simple:
expression: "${variable.route:counter} + 1"
resultType: java.lang.Integer
- setBody:
simple: "${variable.route:counter}"
- setHeader:
name: "Content-Type"
constant: "text/plain"
- to: "{{out}}" {code}
I forgot that + and - etc, aren't operators in Simple (only used to concat
values). So you can't do like Java or Groovy:
{code:java}
int x = 3;
System.out.println(x + 3); {code}
Maybe when all parameters are int than you could use it as an operator like
Java.
> [kamelet] Bean is not registered
> --------------------------------
>
> Key: CAMEL-23652
> URL: https://issues.apache.org/jira/browse/CAMEL-23652
> Project: Camel
> Issue Type: Bug
> Components: camel-kamelet
> Affects Versions: 4.20.0
> Reporter: Raymond
> Assignee: Claus Ibsen
> Priority: Minor
> Fix For: 4.21.0
>
> Attachments: routetemplate-xml.zip
>
>
> I like to use the following Kamelet:
> [https://github.com/apache/camel-kamelets/blob/main/kamelets/counter-source.kamelet.yaml]
> I slightly altered the Kamelet route to this:
> {code:java}
> template:
> beans:
> - name: counter
> type: java.util.concurrent.atomic.AtomicInteger
> constructors:
> "0": "{{start}}"
> from:
> uri: timer:counter
> parameters:
> period: "{{period}}"
> repeatCount: "{{?numbers}}"
> steps:
> - bean:
> ref: "{{counter}}"
> method: getAndIncrement
> - setHeader:
> name: "Content-Type"
> constant: "text/plain"
> - to: "{{out}}" {code}
> However when I call this the bean is not recognized, and a property is
> expected. This is the error I see:
> {code:java}
> Failed to create route:
> 69b3f52efbdb4c0011000147-7cee7a5b-d34c-450e-a8d0-02972b6ad07c at: >>>
> Bean[ref:{{counter}} method:getAndIncrement] <<< in route:
> Route(69b3f52efbdb4c0011000147-7cee7a5b-d34c-450e-a8d0-02972... because:
> Property with key [counter] not found in properties from text: {{counter}}"
> {code}
> I loaded the Kamelets like this:
> {code:java}
> public void setRouteTemplates() {
> List<String> resourceNames = getKamelets();
> RoutesLoader routesLoader = PluginHelper.getRoutesLoader(context);
> for (String resourceName : resourceNames) {
> Resource resource =
> ResourceHelper.resolveResource(context,"classpath:kamelets/" + resourceName);
> try {
> routesLoader.loadRoutes(resource);
> } catch (Exception e) {
> log.warn("Could not load Kamelet: {}. Reason: {}", resourceName,
> e.getMessage());
> }
> }
> } {code}
> I have around 200 Kamelets, and they load and function correctly. The only
> thing that have issues is with the dynamically registered beans that locally
> scoped with the Kamelet. Registering the bean programmatically, and then
> referencing it (both hardcoded or with a property) works fine.
> Is this because they are loaded throught the routesLoader (both the Kamelet,
> as the templatedRoute)? Is this bug or I am missing something?
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