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Objective: Demonstrate the weighted load balancing among a set of endpoints.
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<definitions xmlns="http://ws.apache.org/ns/synapse">
<sequence name="main" onError="errorHandler">
<in>
<send>
<endpoint>
<loadbalance
algorithm="org.apache.synapse.endpoints.algorithms.WeightedRoundRobin">
<endpoint>
<address uri="http://localhost:9001/services/LBService1">
<enableAddressing/>
<suspendOnFailure>
<initialDuration>20000</initialDuration>
<progressionFactor>1.0</progressionFactor>
</suspendOnFailure>
</address>
<property name="loadbalance.weight" value="1"/>
</endpoint>
<endpoint>
<address uri="http://localhost:9002/services/LBService1">
<enableAddressing/>
<suspendOnFailure>
<initialDuration>20000</initialDuration>
<progressionFactor>1.0</progressionFactor>
</suspendOnFailure>
</address>
<property name="loadbalance.weight" value="2"/>
</endpoint>
<endpoint>
<address uri="http://localhost:9003/services/LBService1">
<enableAddressing/>
<suspendOnFailure>
<initialDuration>20000</initialDuration>
<progressionFactor>1.0</progressionFactor>
</suspendOnFailure>
</address>
<property name="loadbalance.weight" value="3"/>
</endpoint>
</loadbalance>
</endpoint>
</send>
<drop/>
</in>
<out>
<send/>
</out>
</sequence>
<sequence name="errorHandler">
<makefault response="true">
<code xmlns:tns="http://www.w3.org/2003/05/soap-envelope" value="tns:Receiver"/>
<reason value="COULDN'T SEND THE MESSAGE TO THE SERVER."/>
</makefault>
<send/>
</sequence>
</definitions> |
Prerequisites:
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- Deploy the
LoadbalanceFailoverServiceand start three instances of sample Axis2 server as mentioned in sample 52.
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| Code Block |
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[java] Request: 1 ==> Response from server: MyServer1 [java] Request: 2 ==> Response from server: MyServer2 [java] Request: 3 ==> Response from server: MyServer2 [java] Request: 4 ==> Response from server: MyServer3 [java] Request: 5 ==> Response from server: MyServer3 [java] Request: 6 ==> Response from server: MyServer3 [java] Request: 7 ==> Response from server: MyServer1 [java] Request: 8 ==> Response from server: MyServer2 [java] Request: 9 ==> Response from server: MyServer2 [java] Request: 10 ==> Response from server: MyServer3 [java] Request: 11 ==> Response from server: MyServer3 [java] Request: 12 ==> Response from server: MyServer3 ... |
As logs , you see something similar to endpoint with weight 1 received a 1 request and endpoint with weight 2 received 2 requests and , etc. .. in a cycle
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Sample on Weighted load balancing between 3 endpoints |
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