[[jolt-component]]
= JOLT Component
:page-source: components/camel-jolt/src/main/docs/jolt-component.adoc

*Available as of Camel version 2.16*


The *jolt:* component allows you to process a JSON messages using an
https://github.com/bazaarvoice/jolt[JOLT] specification. This can be
ideal when doing JSON to JSON transformation.

Maven users will need to add the following dependency to
their `pom.xml` for this component:

[source,xml]
------------------------------------------------------------
<dependency>
    <groupId>org.apache.camel</groupId>
    <artifactId>camel-jolt</artifactId>
    <version>x.x.x</version>
    <!-- use the same version as your Camel core version -->
</dependency>
------------------------------------------------------------

 

== URI format

[source,java]
-----------------------
jolt:specName[?options]
-----------------------

Where *specName* is the classpath-local URI of the specification to
invoke; or the complete URL of the remote specification
(eg: `\file://folder/myfile.vm`).

You can append query options to the URI in the following
format, `?option=value&option=value&...`

== Options




// component options: START
The JOLT component supports 3 options, which are listed below.



[width="100%",cols="2,5,^1,2",options="header"]
|===
| Name | Description | Default | Type
| *transform* (advanced) | Explicitly sets the Transform to use. If not set a Transform specified by the transformDsl will be created |  | Transform
| *allowTemplateFrom Header* (producer) | Whether to allow to use resource template from header or not (default false). Enabling this allows to specify dynamic templates via message header. However this can be seen as a potential security vulnerability if the header is coming from a malicious user, so use this with care. | false | boolean
| *resolveProperty Placeholders* (advanced) | Whether the component should resolve property placeholders on itself when starting. Only properties which are of String type can use property placeholders. | true | boolean
|===
// component options: END






// endpoint options: START
The JOLT endpoint is configured using URI syntax:

----
jolt:resourceUri
----

with the following path and query parameters:

=== Path Parameters (1 parameters):


[width="100%",cols="2,5,^1,2",options="header"]
|===
| Name | Description | Default | Type
| *resourceUri* | *Required* Path to the resource. You can prefix with: classpath, file, http, ref, or bean. classpath, file and http loads the resource using these protocols (classpath is default). ref will lookup the resource in the registry. bean will call a method on a bean to be used as the resource. For bean you can specify the method name after dot, eg bean:myBean.myMethod. |  | String
|===


=== Query Parameters (7 parameters):


[width="100%",cols="2,5,^1,2",options="header"]
|===
| Name | Description | Default | Type
| *allowContextMapAll* (producer) | Sets whether the context map should allow access to all details. By default only the message body and headers can be accessed. This option can be enabled for full access to the current Exchange and CamelContext. Doing so impose a potential security risk as this opens access to the full power of CamelContext API. | false | boolean
| *allowTemplateFromHeader* (producer) | Whether to allow to use resource template from header or not (default false). Enabling this allows to specify dynamic templates via message header. However this can be seen as a potential security vulnerability if the header is coming from a malicious user, so use this with care. | false | boolean
| *contentCache* (producer) | Sets whether to use resource content cache or not | false | boolean
| *inputType* (producer) | Specifies if the input is hydrated JSON or a JSON String. | Hydrated | JoltInputOutputType
| *outputType* (producer) | Specifies if the output should be hydrated JSON or a JSON String. | Hydrated | JoltInputOutputType
| *transformDsl* (producer) | Specifies the Transform DSL of the endpoint resource. If none is specified Chainr will be used. | Chainr | JoltTransformType
| *synchronous* (advanced) | Sets whether synchronous processing should be strictly used, or Camel is allowed to use asynchronous processing (if supported). | false | boolean
|===
// endpoint options: END
// spring-boot-auto-configure options: START
== Spring Boot Auto-Configuration

When using Spring Boot make sure to use the following Maven dependency to have support for auto configuration:

[source,xml]
----
<dependency>
  <groupId>org.apache.camel</groupId>
  <artifactId>camel-jolt-starter</artifactId>
  <version>x.x.x</version>
  <!-- use the same version as your Camel core version -->
</dependency>
----


The component supports 4 options, which are listed below.



[width="100%",cols="2,5,^1,2",options="header"]
|===
| Name | Description | Default | Type
| *camel.component.jolt.allow-template-from-header* | Whether to allow to use resource template from header or not (default false). Enabling this allows to specify dynamic templates via message header. However this can be seen as a potential security vulnerability if the header is coming from a malicious user, so use this with care. | false | Boolean
| *camel.component.jolt.enabled* | Enable jolt component | true | Boolean
| *camel.component.jolt.resolve-property-placeholders* | Whether the component should resolve property placeholders on itself when starting. Only properties which are of String type can use property placeholders. | true | Boolean
| *camel.component.jolt.transform* | Explicitly sets the Transform to use. If not set a Transform specified by the transformDsl will be created. The option is a com.bazaarvoice.jolt.Transform type. |  | String
|===
// spring-boot-auto-configure options: END




== Samples

For example you could use something like

[source,java]
--------------------------------------
from("activemq:My.Queue").
  to("jolt:com/acme/MyResponse.json");
--------------------------------------

And a file based resource:

[source,java]
---------------------------------------------------------------
from("activemq:My.Queue").
  to("jolt:file://myfolder/MyResponse.json?contentCache=true").
  to("activemq:Another.Queue");
---------------------------------------------------------------

You can also specify what specification the component should use
dynamically via a header, so for example:

[source,java]
---------------------------------------------------------------------
from("direct:in").
  setHeader("CamelJoltResourceUri").constant("path/to/my/spec.json").
  to("jolt:dummy");
---------------------------------------------------------------------

 
