simple_cache_proxy.xml

<?xml version="1.0" encoding="UTF-8"?>
<proxy xmlns="http://ws.apache.org/ns/synapse"
       name="simple_cache_proxy"
       startOnLoad="true"
       statistics="disable"
       trace="disable"
       transports="http,https">
    <target>
        <inSequence>
            <log>
                <property name="testing" value="Request arrives in to InSequence"/>
            </log>
            <cache collector="false" timeout="20">
                <onCacheHit>
                    <log level="custom">
                        <property name="testing" value="Cache Hit"/>
                    </log>
                    <respond/>
                </onCacheHit>
                <protocol type="HTTP">
                    <methods>*</methods>
                    <headersToExcludeInHash/>
                    <responseCodes>.*</responseCodes>
                    <enableCacheControl>false</enableCacheControl>
                    <includeAgeHeader>false</includeAgeHeader>
                    <hashGenerator>org.wso2.carbon.mediator.cache.digest.DOMHASHGenerator</hashGenerator>
                </protocol>
                <implementation maxSize="1000"/>
            </cache>
            <log>
                <property name="testing" value="Hi, I am after Cache"/>
            </log>
            <send>
                <endpoint>
                    <address uri="http://www.mocky.io/v2/5c71685c3500005a00e9e82fl"/>
                </endpoint>
            </send>
        </inSequence>
        <outSequence>
            <log>
                <property name="testing" value="Hi, I in the top of Out Sequence"/>
            </log>
            <cache collector="true"/>
            <log>
                <property name="testing" value="I am in Out Sequence and below the Cache"/>
            </log>
            <send/>
        </outSequence>
    </target>
    <description/>
</proxy>