[CONF] Apache Camel > Validate

[confluence]

Validate Page edited by Eric Johnson Changes (10) ... *Available as of Camel 2.3* Validate can be used to validate a message. Imagine you consume text files and before processing each file you want to be sure the content is valid. Validate uses an _expression_ or predicates to validate the contents of a message. It is useful for ensuring that messages are valid before attempting to process them. You can use the validate DSL with all kind of Predicates and Expressions. Validate will just evaluated the Predicate/_expression_ and if its false an PredicateValidationException is thrown. You can use the validate DSL with all kind of Predicates and Expressions. Validate evaluates the Predicate/_expression_ and if it is false a {{PredicateValidationException}} is thrown. If it is true message processing continues. h3. Using from Java DSL In the route below it will read the file content and validate it against a regular _expression_. The route below will read the file contents and validate them against a regular _expression_. {code} from("file://inbox") ... {code} And sure, you You can also use validate together with [simple|http://camel.apache.org/simple.html]. {code} from("file://inbox") ... h3. Using from Spring DSL To use validate in the Spring DSL, the easiest way is to use [simple|http://camel.apache.org/simple.html] expressions. {code:xml} <route> ... {code} The XML DSL to validate the message header would looks like this.: {code:xml} <route> ... Full Content Validate Available as of Camel 2.3 Validate uses an _expression_ or predicates to validate the contents of a message. It is useful for ensuring that messages are valid before attempting to process them. You can use the validate DSL with all kind of Predicates and Expressions. Validate evaluates the Predicate/_expression_ and if it is false a PredicateValidationException is thrown. If it is true message processing continues. Using from Java DSL The route below will read the file contents and validate them against a regular _expression_. from("file://inbox") .validate(body(String.class).regex("^\\w{10}\\,\\d{2}\\,\\w{24}$")) .to("bean:MyServiceBean.processLine"); Validate is not limited to the message body. You can also validate the message header. from("file://inbox") .validate(header("bar").isGreaterThan(100)) .to("bean:MyServiceBean.processLine"); You can also use validate together with simple. from("file://inbox") .validate(simple("${in.header.bar} == 100")) .to("bean:MyServiceBean.processLine"); Using from Spring DSL To use validate in the Spring DSL, the easiest way is to use simple expressions. <route> <from uri="file://inbox"/> <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"/> The XML DSL to validate the message header would looks like this: <route> <from uri="file://inbox"/> <validate> <simple>${in.header.bar} == 100</simple> </validate> <beanRef ref="myServiceBean" method="processLine"/> </route> <bean id="myServiceBean" class="com.mycompany.MyServiceBean"/> Using This Pattern If you would like to use this EIP Pattern then please read the Getting Started, you may also find the Architecture useful particularly the description of Endpoint and URIs. Then you could try out some of the Examples first before trying this pattern out. Change Notification Preferences View Online | View Changes | Add Comment