docs/components/modules/ROOT/pages/class-component.adoc

[[class-component]]
= Class Component
:page-source: components/camel-bean/src/main/docs/class-component.adoc

*Available as of Camel version 2.4*

The Class component binds beans to Camel message exchanges. It works
in the same way as the xref:bean-component.adoc[Bean] component but instead of
looking up beans from a Registry it creates the bean
based on the class name.

== URI format

[source]
----
class:className[?options]
----

Where *className* is the fully qualified class name to create and use as
bean.

== Options


// component options: START
The Class component supports 2 options, which are listed below.



[width="100%",cols="2,5,^1,2",options="header"]
|===
| Name | Description | Default | Type
| *cache* (advanced) | If enabled, Camel will cache the result of the first Registry look-up. Cache can be enabled if the bean in the Registry is defined as a singleton scope. |  | Boolean
| *basicPropertyBinding* (advanced) | Whether the component should use basic property binding (Camel 2.x) or the newer property binding with additional capabilities | false | boolean
|===
// component options: END



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

----
class:beanName
----

with the following path and query parameters:

=== Path Parameters (1 parameters):


[width="100%",cols="2,5,^1,2",options="header"]
|===
| Name | Description | Default | Type
| *beanName* | *Required* Sets the name of the bean to invoke |  | String
|===


=== Query Parameters (6 parameters):


[width="100%",cols="2,5,^1,2",options="header"]
|===
| Name | Description | Default | Type
| *cache* (common) | If enabled, Camel will cache the result of the first Registry look-up. Cache can be enabled if the bean in the Registry is defined as a singleton scope. |  | Boolean
| *method* (common) | Sets the name of the method to invoke on the bean |  | String
| *parameters* (common) | Used for configuring additional properties on the bean |  | Map
| *lazyStartProducer* (producer) | Whether the producer should be started lazy (on the first message). By starting lazy you can use this to allow CamelContext and routes to startup in situations where a producer may otherwise fail during starting and cause the route to fail being started. By deferring this startup to be lazy then the startup failure can be handled during routing messages via Camel's routing error handlers. Beware that when the first message is processed then creating and starting the producer may take a little time and prolong the total processing time of the processing. | false | boolean
| *basicPropertyBinding* (advanced) | Whether the endpoint should use basic property binding (Camel 2.x) or the newer property binding with additional capabilities | false | boolean
| *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


== Using

You simply use the *class* component just as the xref:bean-component.adoc[Bean]
component but by specifying the fully qualified classname instead. +
 For example to use the `MyFooBean` you have to do as follows:

[source,java]
-------------------------------------------------------------------------------------------------
    from("direct:start").to("class:org.apache.camel.component.bean.MyFooBean").to("mock:result");
-------------------------------------------------------------------------------------------------

You can also specify which method to invoke on the `MyFooBean`, for
example `hello`:

[source,java]
--------------------------------------------------------------------------------------------------------------
    from("direct:start").to("class:org.apache.camel.component.bean.MyFooBean?method=hello").to("mock:result");
--------------------------------------------------------------------------------------------------------------

== Setting properties on the created instance

In the endpoint uri you can specify properties to set on the created
instance, for example if it has a `setPrefix` method:

[source,java]
---------------------------------------------------------------------------------
   from("direct:start")
        .to("class:org.apache.camel.component.bean.MyPrefixBean?bean.prefix=Bye")
        .to("mock:result");
---------------------------------------------------------------------------------

And you can also use the `#` syntax to refer to properties to be looked
up in the Registry.

[source,java]
--------------------------------------------------------------------------------
    from("direct:start")
        .to("class:org.apache.camel.component.bean.MyPrefixBean?bean.cool=#foo")
        .to("mock:result");
--------------------------------------------------------------------------------

Which will lookup a bean from the Registry with the
id `foo` and invoke the `setCool` method on the created instance of the
`MyPrefixBean` class.

TIP:See more details at the xref:bean-component.adoc[Bean] component as the *class*
component works in much the same way.