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| |
| <document> |
| <properties> |
| <title>Apache Synapse - Sample 372</title> |
| </properties> |
| <body> |
| <section name="Sample 372: Use of Concurrency Throttling and Request Rate Based Throttling"> |
| <div class="xmlConf"><definitions xmlns="http://ws.apache.org/ns/synapse"> |
| |
| <registry provider="org.apache.synapse.registry.url.SimpleURLRegistry"> |
| <!-- the root property of the simple URL registry helps resolve a resource URL as root + key --> |
| <parameter name="root">file:repository/</parameter> |
| <!-- all resources loaded from the URL registry would be cached for this number of milli seconds --> |
| <parameter name="cachableDuration">150000</parameter> |
| </registry> |
| |
| <sequence name="onAcceptSequence"> |
| <log level="custom"> |
| <property name="text" value="**Access Accept**"/> |
| </log> |
| <send> |
| <endpoint> |
| <address uri="http://localhost:9000/services/SimpleStockQuoteService"/> |
| </endpoint> |
| </send> |
| </sequence> |
| |
| <sequence name="onRejectSequence" trace="enable"> |
| <log level="custom"> |
| <property name="text" value="**Access Denied**"/> |
| </log> |
| <makefault response="true"> |
| <code xmlns:tns="http://www.w3.org/2003/05/soap-envelope" value="tns:Receiver"/> |
| <reason value="**Access Denied**"/> |
| </makefault> |
| <send/> |
| <drop/> |
| </sequence> |
| |
| <proxy name="StockQuoteProxy"> |
| <target> |
| <inSequence> |
| <throttle onReject="onRejectSequence" onAccept="onAcceptSequence" id="A"> |
| <policy key="conf/sample/resources/policy/throttle_policy.xml"/> |
| </throttle> |
| </inSequence> |
| <outSequence> |
| <throttle id="A"/> |
| <send/> |
| </outSequence> |
| </target> |
| <publishWSDL uri="file:repository/conf/sample/resources/proxy/sample_proxy_1.wsdl"/> |
| </proxy> |
| |
| </definitions></div> |
| <subsection name="Objective"> |
| <p> |
| Showcase how to use the concurrency throttling in conjunction with request rate |
| throttling |
| </p> |
| </subsection> |
| <subsection name="Pre-requisites"> |
| <p> |
| <ul> |
| <li> |
| Deploy the SimpleStockQuoteService in the sample Axis2 server and start Axis2 |
| </li> |
| <li> |
| Start Synapse using the configuration numbered 372 (repository/conf/sample/synapse_sample_372.xml) |
| <div class="command"> |
| Unix/Linux: sh synapse.sh -sample 372<br/> |
| Windows: synapse.bat -sample 372 |
| </div> |
| </li> |
| </ul> |
| </p> |
| </subsection> |
| <subsection name="Executing the Client"> |
| <p> |
| This is a combination of <a href="sample370.html">sample 370</a> and |
| <a href="sample371.html">sample 371</a>. In this case the throttle policy is loaded |
| from the 'throttle_policy.xml' file which is fetched from the registry. To verify |
| the functionality, it requires running a load test. The all enabled request from |
| the concurrency throttling will be controlled by the access rate base throttling |
| according to the policy. |
| </p> |
| <p> |
| Run the client as follows. |
| </p> |
| <div class="command">ant stockquote -Daddurl=http://localhost:8280/services/StockQuoteProxy</div> |
| <p> |
| You will get same results as in <a href="sample371.html">sample 371</a>. If you |
| run the load test, results will be different due to the effect of concurrency |
| throttling. |
| </p> |
| </subsection> |
| </section> |
| <p><a href="../samples.html">Back to Catalog</a></p> |
| </body> |
| </document> |
