Java DSL to set object instance in camel exchange property

Question

Is there a one liner Java DSL to do the following:

.process(new Processor() {
    @Override
    public void process(Exchange exchange) throws Exception {
        exchange.setProperty("name", new MyBean());
    }
})

The goal is to have a property 'name' initialised with an new instance of MyBean class before other logic in the route.

I think it must be in the form of:

.setProperty("name", ... expression ...)

I cannot find the right expression.

Thanks.

I can make a custom expression: <br/> public static Expression newInstance(final Class clazz) { return new ExpressionAdapter() { @Override public Object evaluate(Exchange exchange) { try { return clazz.newInstance(); } catch (Exception e) { throw new IllegalArgumentException("Cannot instantiate class '" + clazz.getName() + "': " + e.getMessage()); } } }; } But surely there must be an existing expression.. — JStefan
– JStefan, Commented Jul 6, 2015 at 7:06

cproinger · Accepted Answer · 2019-05-11 14:52:05Z

4

i used

.setProperty("name").exchange(ex -> new MyBean())

answered May 11, 2019 at 14:52

cproinger

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Comments

stringy05 · Accepted Answer · 2015-07-03 13:34:43Z

-1

yes there is.

from("direct:in")
    .setProperty("key").constant(new MyBean())
    .to("direct:out")

You can also use .ref("bean-ref") to refer to something in the registry

answered Jul 3, 2015 at 13:34

stringy05

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3 Comments

JStefan Over a year ago

Constant will give the same object instance with each new message. This is not what i need.

stringy05 Over a year ago

Ref with the bean set to prototype will give you a new object per exchange, otherwise you need to do it with a processor like your question states, or else call a bean which does the same thing. Or if you really really want to keep in the in DSL then this might work .setProperty("key").groovy("new foo.bar.MyBean()"), but I didn't test it

cproinger Over a year ago

as JStefan already stated "Constant will give the same object instance" so misleading answer

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