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<document>
    <properties>
        <title>Apache Synapse - Sample 701</title>
    </properties>
    <body>
        <section name="Sample 701: Introduction to Message Sampling Processor">
            <div class="xmlConf">&lt;!-- Introduction to Message Sampling Processor --&gt;
&lt;definitions xmlns="http://ws.apache.org/ns/synapse"&gt;
    &lt;sequence name="send_seq"&gt;
        &lt;send&gt;
            &lt;endpoint&gt;
                &lt;address uri="http://localhost:9000/services/SimpleStockQuoteService"&gt;
                    &lt;suspendOnFailure&gt;
                        &lt;errorCodes&gt;-1&lt;/errorCodes&gt;
                        &lt;progressionFactor&gt;1.0&lt;/progressionFactor&gt;
                    &lt;/suspendOnFailure&gt;
                &lt;/address&gt;
            &lt;/endpoint&gt;
        &lt;/send&gt;
    &lt;/sequence&gt;
    &lt;sequence name="main"&gt;
        &lt;in&gt;
            &lt;log level="full"/&gt;
            &lt;property name="FORCE_SC_ACCEPTED" value="true" scope="axis2"/&gt;
            &lt;property name="OUT_ONLY" value="true"/&gt;
            &lt;store messageStore="MyStore"/&gt;
        &lt;/in&gt;
        &lt;description&gt;The main sequence for the message mediation&lt;/description&gt;
    &lt;/sequence&gt;
    &lt;messageStore name="MyStore"/&gt;
    &lt;messageProcessor
            class="org.apache.synapse.message.processors.sampler.SamplingProcessor"
            name="SamplingProcessor" messageStore="MyStore"&gt;
        &lt;parameter name="interval"&gt;20000&lt;/parameter&gt;
        &lt;parameter name="sequence"&gt;send_seq&lt;/parameter&gt;
    &lt;/messageProcessor&gt;
&lt;/definitions&gt;</div>
            <subsection name="Objective">
                <p>
                    Introduction to Message Sampling Processor
                </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 701 (repository/conf/sample/synapse_sample_701.xml)
                            <div class="command">
                                Unix/Linux: sh synapse.sh -sample 701<br/>
                                Windows: synapse.bat -sample 701
                            </div>
                        </li>
                    </ul>
                </p>
            </subsection>
            <subsection name="Executing the Client">
                <p>
                    Execute the Client few times with command :
                </p>
                <div class="command">ant stockquote -Daddurl=http://localhost:9000/services/SimpleStockQuoteService -Dtrpurl=http://localhost:8280/ -Dmode=placeorder
                </div>

                <p>
                    When you execute the client the message will be dispatched to the main sequence.
                    In the Main sequence store mediator will store the placeOrder request message in
                    the 'MyStore' message store.
                </p>
                <p>
                    Message Processor will consume the messages and forward to the 'send_seq' sequence
                    in the configured rate.
                </p>
                <p>
                    You will observe that service invocation rate is not changing when increasing the
                    rate at which we execute the client.
                </p>
            </subsection>
        </section>
        <p>
            <a href="../samples.html">Back to Catalog</a>
        </p>
    </body>
</document>
