string-template: component allows you to process a message using a String Template. This can be ideal when using Templating to generate responses for requests.
Maven users will need to add the following dependency to their
pom.xml for this component:
templateName is the classpath-local URI of the template to invoke; or the complete URL of the remote template.
You can append query options to the URI in the following format,
Cache for the resource content when its loaded.
From Camel 2.11.1: configuring the variable start delimiter
From Camel 2.11.1: configuring the variable end delimiter
Camel will store a reference to the resource in the message header with key,
org.apache.camel.stringtemplate.resource. The Resource is an
The string template resource is by default hot-reloadable for both file and classpath resources (expanded jar). If you set
contentCache=true, Camel will load the resource just once, disabling hot-reloading. This scenario can be used in production when the resource never changes.
Camel will provide exchange information as attributes (just a
java.util.Map) to the string template. The Exchange is transferred as:
The Exchange itself.
The headers of the
The Camel Context.
From Camel 2.14: you can define the custom context map by setting the message header
CamelStringTemplateVariableMap, as shown below:
For example you could use a string template as follows in order to formulate a response to a message:
In this sample we want to use a string template to send an order confirmation email. The email template is laid out in
This example works for camel 2.11.0. If your camel version is less than 2.11.0, the variables should be started and ended with
And the java code is as follows: