Vitalii, it was the first iteration just to have some feedbacks ;)
I've added something more now as experiment so your suggestions should
have been covered now.
By extending ExpressionClause built-in body/inMessage/etc, we could
have something like:
from("timer:simple?period=503")
.id("simple-route")
.transform()
.exchange(this::dateToTime)
.choice()
.when()
.body(Integer.class, b -> (b & 1) == 0)
.log("Received even number")
.when()
.body(Integer.class, (b, h) -> h.containsKey("skip") ?
false : (b & 1) == 0)
.log("Received odd number")
.when()
.body(b -> b instanceof Number)
.log("Received a number number")
.when()
.inMessage(m -> m.getBody() == null)
.log("Received null body")
.when()
.body(Integer.class, b -> (b & 1) == 0)
.log("Received odd number")
.endChoice();
---
Luca Burgazzoli
On Wed, Sep 7, 2016 at 2:16 PM, Vitalii Tymchyshyn <v...@tym.im> wrote:
> Hi.
>
> Why BodyFunction is a BiFunction? It would be great to have some method to
> pass any Functional interface (any function) that would receive body as
> parameter and result would be stored as an answer. This would allow to use
> tons of existing functional method.
> E.g. something like this would be possible:
> .transform(function(String.class, String::toUpperCase))
> Another thing is that often body type is not needed, e.g.
> .transform(onBody(String::toUpperCase)) looks more readable.
> i'd also rename other "function" calls with something that gives more
> information like "onExchange", "onMessage" (or even simply body(),
> exchange(), message()). This would also make casting unnesessary.
>
> Best regards, Vitalii Tymchyshyn
>
> Вт, 6 вер. 2016 о 11:38 Luca Burgazzoli <lburgazz...@gmail.com> пише:
>
>> Hello everyone,
>> I've started working on CAMEL-7831 to create a Java8 example to use
>> Expressions and I've ended up with a simple example - see [1].
>> Of course it is only for demonstrative purpose.
>>
>> Java8 lambda support to Expressions has been added to
>> - ExpressionClause to avoid adding overload method for every method
>> accepting an Expressions definition
>> - ExpressionBuilder so you can use something like transform(function(e ->
>> ...))
>>
>> There are some additional functional interfaces to select the argument
>> of the lambda
>> - ExchangeFunction
>> - MessageFunction
>> - BodyFunction
>>
>>
>> Any feedback would be really appreciated.
>>
>> Regards,
>> Luca
>>
>>
>> [1]
>> https://github.com/lburgazzoli/apache-camel/blob/CAMEL-7831/examples/camel-example-dsl-java8/src/main/java/org/apache/camel/example/dsl/java8/MyRoute.java
>>
>>
>> ---
>> Luca Burgazzoli
>>
