How to split existing collection in Camel - apache-camel

Question

I have a producer which sends a Set<Status>. I want to split the Set so downstream components have to process single Status objects. My route looks like this:
public Set<Status> loadStatus() { ... }
from("direct:start").
split().
to("mock:end");
ProducerTemplate template = context.createProducerTemplate();
template.sendBody("direct:start", loadStatuses());
How is this achieved?

Answer 1

the Camel Splitter documentation describes how a Collection, Iterator or Array can be used...
A common use case is to split a Collection, Iterator or Array from the
message. In the sample below we simply use an Expression to identify
the value to split.
from("direct:splitUsingBody").split(body()).to("mock:result");
from("direct:splitUsingHeader").split(header("foo")).to("mock:result");
In Spring XML you can use the Simple language to identify the value to
split.
<split>
<simple>${body}</simple>
<to uri="mock:result"/>
</split>
<split>
<simple>${header.foo}</simple>
<to uri="mock:result"/>
</split>

Answer 2

Turns out the docs are a bit unclear: none of the examples explicitly mention having a body that's a Java collection. The solution is to split the body without any expression. In that case, Camel will use it's internal conversion engine to return an Iterator from a Set. The final route is:
from("direct:start").
split(body()).
to("mock:end");
Found a reference in the Camel JDBC samples documentation:
from("direct:hello")
// here we split the data from the testdb into new messages one by one
// so the mock endpoint will receive a message per row in the table
.to("jdbc:testdb").split(body()).to("mock:result");