Improved Business Availability and Scalability with WSO2 ESB 4.9.0’s New

Coordination Framework

Ravindra RanwalaSoftware Engineer

Nadeeshaan GunasingheSoftware Engineer

Nov 2015

About the Presenters

● Ravindra Ranwala Software Engineer WSO2

● Nadeeshaan Gunasinghe Software Engineer WSO2

Outline● Business Availability

● Business Scalability

● Coordination Support in WSO2 ESB

○ Message Processor

○ Scheduled Tasks

● Demonstration on Tasks and Message Processor in a Clustered Environment

● Conclusion

● Q&A

Business Availability

● Ensure your systems run most of the time without interruptions

● How to Achieve

○ Avoiding Single point of failures

● Real world Implementation

○ Clusters of Service Nodes

Business Scalability

● Definition: Accepts increased traffic in graceful and controlled manner

● How to Achieve

○ By adding more nodes to a system

● Real World Implementation

○ Clustering the Nodes

Task Coordination Support in WSO2 ESB

● Using the much faster coordination support of the Carbon framework

● Scheduled Tasks and Message Processors

○ Deploying in the clusters and coordination across the nodes

○ Continuously running as long as there is at least one node is up and

running

Message Processor● Guaranteed delivery with store and forward mechanism

● Rate matching/ Throttling can be done by using the Sampling Processor

● JMS Message broker as the persistence store – WSO2 MB, Apache ActiveMQ etc.

● MP Coordination support - Clustered Environment

○ Yields high Availability and Scalability

Store And Forward - Guaranteed Delivery

● Scheduled Message Forwarding Processor can be used.

Store and Forward - Request Rate Matching

● Sampling Message Processor can be used.

MP Coordination Support - Single Task

MP Coordination Support - Multiple Tasks

Scheduled Tasks● Facilitate to run a job triggered by a timer

● WSO2 ESB has it’s inbuilt task support to allow injecting messages to ESB in scheduled

intervals

● Task Trigger types

○ Specifying the count and interval

○ Cron expressions

○ Making the task run only once with the once atribute

Scheduled Tasks Ctd..● Writing own tasks with custom Java Classes implementing org.apache.synapse.startup.Task

Interface

Scheduled Tasks Ctd..

Scheduled Tasks Ctd..

● Source Configuration for scheduling the task

<task class="org.apache.synapse.startup.tasks.MessageInjector" group="synapse.simple.quartz" name="SimpleStockQuoteTask">

<trigger count="12" interval="60"/>

</task>

Scheduled Tasks Ctd..

● Injecting a Message to a Specified Sequence through a task

<task name="SampleInjectToSequenceTask" class="org.apache.synapse.startup.tasks.MessageInjector" roup="synapse.simple.quartz">

<trigger count="2" interval="5"/>

<property xmlns:task="http://www.wso2.org/products/wso2commons/tasks" name="injectTo" value="sequence"/>

<property xmlns:task="http://www.wso2.org/products/wso2commons/tasks" name="message">

<m0:getQuote xmlns:m0="http://services.samples">

<m0:request>

<m0:symbol>IBM</m0:symbol>

</m0:request>

</m0:getQuote>

</property>

<property xmlns:task="http://www.wso2.org/products/wso2commons/tasks" name="sequenceName" value="SampleSequence"/>

</task>

Scheduled Tasks Ctd..

● Injecting a Message to a Specified proxy service through a task

<task name="SampleInjectToProxyTask" class="org.apache.synapse.startup.tasks.MessageInjector" group="synapse.simple.quartz">

<trigger count="2" interval="5"/>

<property xmlns:task="http://www.wso2.org/products/wso2commons/tasks" name="message">

<m0:getQuote xmlns:m0="http://services.samples">

<m0:request>

<m0:symbol>IBM</m0:symbol>

</m0:request>

</m0:getQuote>

</property>

<property xmlns:task="http://www.wso2.org/products/wso2commons/tasks" name="proxyName" value="SampleProxy"/>

<property xmlns:task="http://www.wso2.org/products/wso2commons/tasks" name="injectTo" value="proxy"/>

</task>

Scheduled Task Demo

Q & A

Thank You

References● https://en.wikipedia.org/wiki/High_availability_software

● https://en.wikipedia.org/wiki/Scalability

● http://ravindraranwala.blogspot.com/2015/09/message-processor-coordination-support.html

● http://soatutorials.blogspot.com/2015/09/wso2-esb-490-released.html

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