Search

9.6. Validate

download PDF

Overview

The validate pattern provides a convenient syntax to check whether the content of a message is valid. The validate DSL command takes a predicate expression as its sole argument: if the predicate evaluates to true, the route continues processing normally; if the predicate evaluates to false, a PredicateValidationException is thrown.

Java DSL example

The following route validates the body of the current message using a regular expression:
from("jms:queue:incoming")
  .validate(body(String.class).regex("^\\w{10}\\,\\d{2}\\,\\w{24}$"))
  .to("bean:MyServiceBean.processLine");
You can also validate a message header—for example:
from("jms:queue:incoming")
  .validate(header("bar").isGreaterThan(100))
  .to("bean:MyServiceBean.processLine");
And you can use validate with the simple expression language:
from("jms:queue:incoming")
  .validate(simple("${in.header.bar} == 100"))
  .to("bean:MyServiceBean.processLine");

XML DSL example

To use validate in the XML DSL, the recommended approach is to use the simple expression language:
<route>
  <from uri="jms:queue:incoming"/>
  <validate>
    <simple>${body} regex ^\\w{10}\\,\\d{2}\\,\\w{24}$</simple>
  </validate>
  <beanRef ref="myServiceBean" method="processLine"/>
</route>

<bean id="myServiceBean" class="com.mycompany.MyServiceBean"/>
You can also validate a message header—for example:
<route>
  <from uri="jms:queue:incoming"/>
  <validate>
    <simple>${in.header.bar} == 100</simple>
  </validate>
  <beanRef ref="myServiceBean" method="processLine"/>
</route>

<bean id="myServiceBean" class="com.mycompany.MyServiceBean"/>
Red Hat logoGithubRedditYoutubeTwitter

Learn

Try, buy, & sell

Communities

About Red Hat Documentation

We help Red Hat users innovate and achieve their goals with our products and services with content they can trust.

Making open source more inclusive

Red Hat is committed to replacing problematic language in our code, documentation, and web properties. For more details, see the Red Hat Blog.

About Red Hat

We deliver hardened solutions that make it easier for enterprises to work across platforms and environments, from the core datacenter to the network edge.

© 2024 Red Hat, Inc.