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You can append query options to the URI in the following format, ?option=value&option=value&...
Options
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Option | Default | Description |
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contentCache | true | Cache for the resource content when it is loaded. The cached resource content can be cleared via JMX using the endpoint's clearContentCache operation. | encoding | null | Character encoding of the resource content. |
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|| Option || Default || Description ||
| {{contentCache}} | {{true}} | Cache for the resource content when it is loaded. The cached resource content can be cleared via JMX using the endpoint's {{clearContentCache}} operation. |
| {{encoding}} | {{null}} | Character encoding of the resource content. |
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The mvel component sets a couple headers on the message.
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Header | Description |
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CamelMvelResourceUri | The templateName as a String object. |
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|| Header || Description ||
| {{CamelMvelResourceUri}} | The *templateName* as a {{String}} object. |
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MVEL Context
Camel will provide exchange information in the MVEL context (just a Map). The Exchange is transfered as:
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key | value |
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exchange | The Exchange itself. | exchange.properties | The Exchange properties. | headers | The headers of the In message. | camelContext | The Camel Context intance. | request | The In message. | in | The In message. | body | The In message body. | out | The Out message (only for InOut message exchange pattern). | response | The Out message (only for InOut message exchange pattern). |
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| {{exchange}} | The {{Exchange}} itself. |
| {{exchange.properties}} | The {{Exchange}} properties. |
| {{headers}} | The headers of the In message. |
| {{camelContext}} | The Camel Context intance. |
| {{request}} | The In message. |
| {{in}} | The In message. |
| {{body}} | The In message body. |
| {{out}} | The Out message (only for InOut message exchange pattern). |
| {{response}} | The Out message (only for InOut message exchange pattern). |
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Hot reloading
The mvel template resource is, by default, hot reloadable for both file and classpath resources (expanded jar). If you set contentCache=true, Camel will only load the resource once, and thus hot reloading is not possible. This scenario can be used in production, when the resource never changes.
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Camel provides two headers by which you can define a different resource location for a template or the template content itself. If any of these headers is set then Camel uses this over the endpoint configured resource. This allows you to provide a dynamic template at runtime.
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Header | Type | Description |
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CamelMvelResourceUri | String | A URI for the template resource to use instead of the endpoint configured. | CamelMvelTemplate | String | The template to use instead of the endpoint configured. |
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| CamelMvelResourceUri | String | A URI for the template resource to use instead of the endpoint configured. |
| CamelMvelTemplate | String | The template to use instead of the endpoint configured. |
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Samples
For example you could use something like
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