[CAMEL-12520] FluentProducerTemplate.withExchange() does not seem to send exchange

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 2.19.2, 2.19.3, 2.19.4, 2.19.5, 2.20.0, 2.20.1, 2.20.2, 2.20.3, 2.21.0
• Fix Version/s: 2.23.0
• Component/s: camel-core

Environment

Linux and Java 8 or Java 9

• Estimated Complexity: Unknown
• Assignee: Claus Ibsen
• Reporter: Steve Storck
• Created: 16/May/18 20:31
• Updated: 16/Aug/18 08:45
• Resolved: 16/Aug/18 08:45

Description

When I use the following simple but complete code example:

public static void main(String[] args) throws Exception {
    CamelContext camelContext = new DefaultCamelContext();
    camelContext.start();
    camelContext.addRoutes(new RouteBuilder() {
        @Override
        public void configure() {
            from("direct-vm:start").process(exchange -> {
                String incoming = exchange.getIn().getBody(String.class);
                exchange.getIn().setBody("Message received: " + incoming, String.class);
            });
        }
    });
    Exchange exchange = ExchangeBuilder.anExchange(camelContext)
            .withBody("Hello!")
            .withPattern(ExchangePattern.InOut)
            .build();
    System.out.println(
            camelContext.createFluentProducerTemplate()
            .withExchange(exchange)
            .to("direct-vm:start")
            .request(String.class)
    );
}

The message body appears to be missing, as indicated in the program output:

Message received: null

I have tried this with java 1.8 and 1.9, and with camel 2.19.2 and 2.21.1, and both camel versions exhibit the same behavior when run with both java versions.