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Chapter 12. Atomix Map Component
Available as of Camel version 2.20
The camel atomix-map component allows you to work with Atomix’s Distributed Map collection.
Maven users will need to add the following dependency to their pom.xml for this component:
<dependency>
<groupId>org.apache.camel</groupId>
<artifactId>camel-atomix</artifactId>
<version>${camel-version}</version>
</dependency>12.1. URI format
atomix-map:mapName
12.2. Options
The Atomix Map component supports 5 options which are listed below.
| Name | Description | Default | Type |
|---|---|---|---|
| configuration (common) | The shared component configuration | AtomixMapConfiguration | |
| atomix (common) | The shared AtomixClient instance | AtomixClient | |
| nodes (common) | The nodes the AtomixClient should connect to | List | |
| configurationUri (common) | The path to the AtomixClient configuration | 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 |
The Atomix Map endpoint is configured using URI syntax:
atomix-map:resourceName
with the following path and query parameters:
12.2.1. Path Parameters (1 parameters):
| Name | Description | Default | Type |
|---|---|---|---|
| resourceName | Required The distributed resource name | String |
12.2.2. Query Parameters (18 parameters):
| Name | Description | Default | Type |
|---|---|---|---|
| atomix (common) | The Atomix instance to use | Atomix | |
| configurationUri (common) | The Atomix configuration uri. | String | |
| defaultAction (common) | The default action. | PUT | Action |
| key (common) | The key to use if none is set in the header or to listen for events for a specific key. | Object | |
| nodes (common) | The address of the nodes composing the cluster. | String | |
| resultHeader (common) | The header that wil carry the result. | String | |
| transport (common) | Sets the Atomix transport. | io.atomix.catalyst.transport.netty.NettyTransport | Transport |
| ttl (common) | The resource ttl. | long | |
| bridgeErrorHandler (consumer) | Allows for bridging the consumer to the Camel routing Error Handler, which mean any exceptions occurred while the consumer is trying to pickup incoming messages, or the likes, will now be processed as a message and handled by the routing Error Handler. By default the consumer will use the org.apache.camel.spi.ExceptionHandler to deal with exceptions, that will be logged at WARN or ERROR level and ignored. | false | boolean |
| exceptionHandler (consumer) | To let the consumer use a custom ExceptionHandler. Notice if the option bridgeErrorHandler is enabled then this options is not in use. By default the consumer will deal with exceptions, that will be logged at WARN or ERROR level and ignored. | ExceptionHandler | |
| exchangePattern (consumer) | Sets the exchange pattern when the consumer creates an exchange. | ExchangePattern | |
| defaultResourceConfig (advanced) | The cluster wide default resource configuration. | Properties | |
| defaultResourceOptions (advanced) | The local default resource options. | Properties | |
| ephemeral (advanced) | Sets if the local member should join groups as PersistentMember or not. If set to ephemeral the local member will receive an auto generated ID thus the local one is ignored. | false | boolean |
| readConsistency (advanced) | The read consistency level. | ReadConsistency | |
| resourceConfigs (advanced) | Cluster wide resources configuration. | Map | |
| resourceOptions (advanced) | Local resources configurations | Map | |
| synchronous (advanced) | Sets whether synchronous processing should be strictly used, or Camel is allowed to use asynchronous processing (if supported). | false | boolean |
12.3. Headers
| Name | Type | Values | Description |
|---|---|---|---|
| CamelAtomixResourceAction | AtomixMap.Action |
| The action to perform |
| CamelAtomixResourceKey | Object | - | The key to operate on |
| CamelAtomixResourceValue | Object | - | The value, if missing In Body is used |
| CamelAtomixResourceOldValue | Object | - | The old value |
| CamelAtomixResourceTTL | String / long | - | The entry TTL |
| CamelAtomixResourceReadConsistency | ReadConsistency |
| The read consistency level |
12.4. Configuring the component to connect to an Atomix cluster
The nodes of the Atomix cluster you want to join can be se at Endpoint or component level (recommended), below some examples:
Endpoint:
<beans xmlns="..."> <camelContext xmlns="http://camel.apache.org/schema/spring"> <from uri="direct:start"/> <to uri="atomix-map:myMap?nodes=node-1.atomix.cluster:8700,node-2.atomix.cluster:8700"/> </route> </camelContext> </beans>Component:
<beans xmlns="..."> <bean id="atomix-map" class="org.apache.camel.component.atomix.client.map.AtomixMapComponent"> <property name="nodes" value="nodes=node-1.atomix.cluster:8700,node-2.atomix.cluster:8700"/> </bean> <camelContext xmlns="http://camel.apache.org/schema/spring"> <from uri="direct:start"/> <to uri="atomix-map:myMap"/> </route> </camelContext> </beans>
12.5. Usage examples:
PUT an element with TTL of 1 second:
FluentProducerTemplate.on(context) .withHeader(AtomixClientConstants.RESOURCE_ACTION, AtomixMap.Action.PUT) .withHeader(AtomixClientConstants.RESOURCE_KEY, key) .withHeader(AtomixClientConstants.RESOURCE_TTL, "1s") .withBody(val) .to("direct:start") .send();
