[[hazelcast-atomicvalue-component]]
== Hazelcast Atomic Number Component

*Available as of Camel version 2.7*

The http://www.hazelcast.com/[Hazelcast] atomic number component is one of Camel Hazelcast Components which allows you to access Hazelcast atomic number.
An atomic number is an object that simply provides a grid wide number (long). 

*There is no consumer for this endpoint!*


### Options

// component options: START
The Hazelcast Atomic Number component supports 3 options, which are listed below.



[width="100%",cols="2,5,^1,2",options="header"]
|===
| Name | Description | Default | Type
| *hazelcastInstance* (advanced) | The hazelcast instance reference which can be used for hazelcast endpoint. If you don't specify the instance reference, camel use the default hazelcast instance from the camel-hazelcast instance. |  | HazelcastInstance
| *hazelcastMode* (advanced) | The hazelcast mode reference which kind of instance should be used. If you don't specify the mode, then the node mode will be the default. | node | String
| *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 Hazelcast Atomic Number endpoint is configured using URI syntax:

----
hazelcast-atomicvalue:cacheName
----

with the following path and query parameters:

==== Path Parameters (1 parameters):


[width="100%",cols="2,5,^1,2",options="header"]
|===
| Name | Description | Default | Type
| *cacheName* | *Required* The name of the cache |  | String
|===


==== Query Parameters (10 parameters):


[width="100%",cols="2,5,^1,2",options="header"]
|===
| Name | Description | Default | Type
| *reliable* (common) | Define if the endpoint will use a reliable Topic struct or not. | false | boolean
| *defaultOperation* (producer) | To specify a default operation to use, if no operation header has been provided. |  | HazelcastOperation
| *hazelcastInstance* (producer) | The hazelcast instance reference which can be used for hazelcast endpoint. |  | HazelcastInstance
| *hazelcastInstanceName* (producer) | The hazelcast instance reference name which can be used for hazelcast endpoint. If you don't specify the instance reference, camel use the default hazelcast instance from the camel-hazelcast instance. |  | String
| *synchronous* (advanced) | Sets whether synchronous processing should be strictly used, or Camel is allowed to use asynchronous processing (if supported). | false | boolean
| *concurrentConsumers* (seda) | To use concurrent consumers polling from the SEDA queue. | 1 | int
| *onErrorDelay* (seda) | Milliseconds before consumer continues polling after an error has occurred. | 1000 | int
| *pollTimeout* (seda) | The timeout used when consuming from the SEDA queue. When a timeout occurs, the consumer can check whether it is allowed to continue running. Setting a lower value allows the consumer to react more quickly upon shutdown. | 1000 | int
| *transacted* (seda) | If set to true then the consumer runs in transaction mode, where the messages in the seda queue will only be removed if the transaction commits, which happens when the processing is complete. | false | boolean
| *transferExchange* (seda) | If set to true the whole Exchange will be transfered. If header or body contains not serializable objects, they will be skipped. | 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-hazelcast-starter</artifactId>
  <version>x.x.x</version>
  <!-- use the same version as your Camel core version -->
</dependency>
----


The component supports 6 options, which are listed below.



[width="100%",cols="2,5,^1,2",options="header"]
|===
| Name | Description | Default | Type
| *camel.component.hazelcast-atomicvalue.customizer.hazelcast-instance.enabled* | Enable or disable the cache-manager customizer. | true | Boolean
| *camel.component.hazelcast-atomicvalue.customizer.hazelcast-instance.override* | Configure if the cache manager eventually set on the component should be overridden by the customizer. | false | Boolean
| *camel.component.hazelcast-atomicvalue.enabled* | Enable hazelcast-atomicvalue component | true | Boolean
| *camel.component.hazelcast-atomicvalue.hazelcast-instance* | The hazelcast instance reference which can be used for hazelcast endpoint. If you don't specify the instance reference, camel use the default hazelcast instance from the camel-hazelcast instance. The option is a com.hazelcast.core.HazelcastInstance type. |  | String
| *camel.component.hazelcast-atomicvalue.hazelcast-mode* | The hazelcast mode reference which kind of instance should be used. If you don't specify the mode, then the node mode will be the default. | node | String
| *camel.component.hazelcast-atomicvalue.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
|===
// spring-boot-auto-configure options: END



### atomic number producer - to("hazelcast-atomicvalue:foo")

The operations for this producer are:
* setvalue (set the number with a given value)
* get
* increase (+1)
* decrease (-1)
* destroy

Header Variables for the request message:

[width="100%",cols="10%,10%,80%",options="header",]
|=======================================================================
|Name |Type |Description

|`CamelHazelcastOperationType` |`String` |valid values are: setvalue, get, increase, decrease, destroy 
|=======================================================================

#### Sample for *set*:

Java DSL:

[source,java]
-----------------------------------------------------------------------------------------
from("direct:set")
.setHeader(HazelcastConstants.OPERATION, constant(HazelcastOperation.SET_VALUE))
.toF("hazelcast-%sfoo", HazelcastConstants.ATOMICNUMBER_PREFIX);
-----------------------------------------------------------------------------------------

Spring DSL:

[source,java]
-----------------------------------------------------------------------------------------------
<route>
    <from uri="direct:set" />
        <!-- If using version 2.8 and above set headerName to "CamelHazelcastOperationType" -->
    <setHeader headerName="hazelcast.operation.type">
        <constant>setvalue</constant>
    </setHeader>
    <to uri="hazelcast-atomicvalue:foo" />
</route>
-----------------------------------------------------------------------------------------------

Provide the value to set inside the message body (here the value is 10):
`template.sendBody("direct:set", 10);`

#### Sample for *get*:

Java DSL:

[source,java]
------------------------------------------------------------------------------------
from("direct:get")
.setHeader(HazelcastConstants.OPERATION, constant(HazelcastOperation.GET))
.toF("hazelcast-%sfoo", HazelcastConstants.ATOMICNUMBER_PREFIX);
------------------------------------------------------------------------------------

Spring DSL:

[source,java]
-----------------------------------------------------------------------------------------------
<route>
    <from uri="direct:get" />
        <!-- If using version 2.8 and above set headerName to "CamelHazelcastOperationType" -->
    <setHeader headerName="hazelcast.operation.type">
        <constant>get</constant>
    </setHeader>
    <to uri="hazelcast-atomicvalue:foo" />
</route>
-----------------------------------------------------------------------------------------------

You can get the number with
`long body = template.requestBody("direct:get", null, Long.class);`.

#### Sample for *increment*:

Java DSL:

[source,java]
------------------------------------------------------------------------------------------
from("direct:increment")
.setHeader(HazelcastConstants.OPERATION, constant(HazelcastOperation.INCREMENT))
.toF("hazelcast-%sfoo", HazelcastConstants.ATOMICNUMBER_PREFIX);
------------------------------------------------------------------------------------------

Spring DSL:

[source,java]
-----------------------------------------------------------------------------------------------
<route>
    <from uri="direct:increment" />
        <!-- If using version 2.8 and above set headerName to "CamelHazelcastOperationType" -->
    <setHeader headerName="hazelcast.operation.type">
        <constant>increment</constant>
    </setHeader>
    <to uri="hazelcast-atomicvalue:foo" />
</route>
-----------------------------------------------------------------------------------------------

The actual value (after increment) will be provided inside the message
body.

#### Sample for *decrement*:

Java DSL:

[source,java]
------------------------------------------------------------------------------------------
from("direct:decrement")
.setHeader(HazelcastConstants.OPERATION, constant(HazelcastOperation.DECREMENT))
.toF("hazelcast-%sfoo", HazelcastConstants.ATOMICNUMBER_PREFIX);
------------------------------------------------------------------------------------------

Spring DSL:

[source,java]
-----------------------------------------------------------------------------------------------
<route>
    <from uri="direct:decrement" />
        <!-- If using version 2.8 and above set headerName to "CamelHazelcastOperationType" -->
    <setHeader headerName="hazelcast.operation.type">
        <constant>decrement</constant>
    </setHeader>
    <to uri="hazelcast-atomicvalue:foo" />
</route>
-----------------------------------------------------------------------------------------------

The actual value (after decrement) will be provided inside the message
body.

#### Sample for *destroy*

Java DSL:

[source,java]
----------------------------------------------------------------------------------------
from("direct:destroy")
.setHeader(HazelcastConstants.OPERATION, constant(HazelcastOperation.DESTROY))
.toF("hazelcast-%sfoo", HazelcastConstants.ATOMICNUMBER_PREFIX);
----------------------------------------------------------------------------------------

Spring DSL:

[source,java]
-----------------------------------------------------------------------------------------------
<route>
    <from uri="direct:destroy" />
        <!-- If using version 2.8 and above set headerName to "CamelHazelcastOperationType" -->
    <setHeader headerName="hazelcast.operation.type">
        <constant>destroy</constant>
    </setHeader>
    <to uri="hazelcast-atomicvalue:foo" />
</route>
-----------------------------------------------------------------------------------------------
