THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
Load balancing using Mina example
This example show how you can easily use the camel-mina component to design a solution allowing to distribute message
workload on several servers. Those servers are simple TCP/IP servers created by the Apache MINA framework and running in
separate Java Virtual Machine. The Load balancer EIP pattern of Camel which is used top of them allows to send in a Round Robin model
mode the messages created from a Bean component respectively to each server running on localhost:9999 and localhost:9998.
MINA has been configured to send over the wire objects serialized and this is what is showed also in this example.
The advantage of this approach is that you don't need to use CORBA or Java RMI for the communication between the different JVMs.
The example has been configured to use InOut EIP pattern.
The demo starts when every one minute, a Report object is created from the camel loadbalancer server. This object is send by the
camel loadbalancer to a MINA server and object is serialized. One of the two MINA servers (localhost:9999 and localhost:9998) receives
the object and enrich it by setting the field reply of the Report object. The reply is send back by the MINA server to the waiting caller,
who will display in its log the content of the Report object.
Description of the routes
Load balancer (the caller)
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:camel="http://camel.apache.org/schema/spring"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
http://camel.apache.org/schema/spring
http://camel.apache.org/schema/spring/camel-spring.xsd ">
<bean id="service" class="org.apache.camel.example.service.Generator"/>
<camelContext xmlns="http://camel.apache.org/schema/spring" trace="false">
<package>
com.intuit.ai.step.camel
</package>
<route id="sendMessage">
<from uri="timer://org.apache.camel.example.loadbalancer?fixedRate=true&period=60000"/>
<bean ref="service" method="createReport"/>
<to uri="direct:loadbalance"/>
</route>
<route id="loadbalancer">
<from uri="direct:loadbalance"/>
<loadBalance>
<roundRobin/>
<to uri="mina:tcp://localhost:9999?sync=true&allowDefaultCodec=true"/>
<to uri="mina:tcp://localhost:9998?sync=true&allowDefaultCodec=true"/>
</loadBalance>
<to uri="log:org.apache.camel.example?level=INFO"/>
</route>
</camelContext>
</beans>
Mina Server 1
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:camel="http://camel.apache.org/schema/spring"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
http://camel.apache.org/schema/spring
http://camel.apache.org/schema/spring/camel-spring.xsd ">
<bean id="service" class="org.apache.camel.example.service.Reporting"/>
<camelContext xmlns="http://camel.apache.org/schema/spring" trace="false">
<route id="mina1">
<from uri="mina:tcp://localhost:9999"/>
<setHeader headerName="minaServer"><constant>localhost:9999</constant></setHeader>
<bean ref="service" method="updateReport"/>
</route>
</camelContext>
</beans>
Mina Server 2
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:camel="http://camel.apache.org/schema/spring"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
http://camel.apache.org/schema/spring
http://camel.apache.org/schema/spring/camel-spring.xsd ">
<bean id="service" class="org.apache.camel.example.service.Reporting"/>
<camelContext xmlns="http://camel.apache.org/schema/spring" trace="false">
<route id="mina1">
<from uri="mina:tcp://localhost:9998"/>
<setHeader headerName="minaServer"><constant>localhost:9999</constant></setHeader>
<bean ref="service" method="updateReport"/>
</route>
</camelContext>
</beans>
How to run the example
To compile and install the project in your maven repo, execute the following command on the root of the project:
mvn clean install
To run the example, execute now the following command in the respective folder:
>mina1 mvn exec:java -Pmina1
>mina2 mvn exec:java -Pmina2
>loadbalancing mvn exec:java -Ploadbalancer
and check the result in the log of loadbalancer
[pache.camel.spring.Main.main()] MainSupport INFO Apache Camel 2.2.0 starting [pache.camel.spring.Main.main()] CamelNamespaceHandler INFO camel-osgi.jar/camel-spring-osgi.jar not detected in classpath [pache.camel.spring.Main.main()] DefaultCamelContext INFO Apache Camel 2.2.0 (CamelContext:camelContext) is starting [pache.camel.spring.Main.main()] DefaultCamelContext INFO JMX enabled. Using DefaultManagedLifecycleStrategy. [pache.camel.spring.Main.main()] DefaultCamelContext INFO Started 2 routes [pache.camel.spring.Main.main()] DefaultCamelContext INFO Apache Camel 2.2.0 (CamelContext:camelContext) started [che.camel.example.loadbalancer] example INFO Exchange[BodyType:org.apache.camel.example.model.Report, Body:>> *************** ******************************** >> Report id : 1 >> Report title : Report Title : 1 >> Report content : This is a dummy report >> Report reply : Report updated from MINA server running on : localhost:9999 >> *********************************************** ] [che.camel.example.loadbalancer] example INFO Exchange[BodyType:org.apache.camel.example.model.Report, Body:>> *************** ******************************** >> Report id : 2 >> Report title : Report Title : 2 >> Report content : This is a dummy report >> Report reply : Report updated from MINA server running on : localhost:9998 >> *********************************************** ] [che.camel.example.loadbalancer] example INFO Exchange[BodyType:org.apache.camel.example.model.Report, Body:>> *************** ******************************** >> Report id : 3 >> Report title : Report Title : 3 >> Report content : This is a dummy report >> Report reply : Report updated from MINA server running on : localhost:9999 >> *********************************************** ] ...