How to write custom handler for API Manager

In this(https://docs.wso2.com/display/AM180/Writing+Custom+Handlers) post we have explained how we can add handler to API Manager.

Here in this post i will add sample code required for handler. You can import this to you favorite IDE and start implementing your logic.

Please find sample code here[https://drive.google.com/file/d/0B3OmQJfm2Ft8YlRjYV96VVcxaVk/view?usp=sharing]

Dummy class would be like this. You can implement your logic there

package org.wso2.carbon.test.gateway;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.synapse.Mediator;
import org.apache.synapse.MessageContext;
import org.apache.synapse.core.axis2.Axis2MessageContext;
import org.apache.synapse.rest.AbstractHandler;
import org.apache.synapse.rest.RESTConstants;
import org.wso2.carbon.apimgt.impl.APIConstants;
import org.wso2.carbon.context.PrivilegedCarbonContext;
import org.wso2.carbon.utils.multitenancy.MultitenantConstants;
import java.util.Iterator;
import java.util.Map;
import java.util.TreeMap;

public class TestHandler extends AbstractHandler {

    private static final String EXT_SEQUENCE_PREFIX = "WSO2AM--Ext--";
    private static final String DIRECTION_OUT = "Out";
    private static final Log log = LogFactory.getLog(TestHandler.class);

    public boolean mediate(MessageContext messageContext, String direction) {
        log.info("===============================================================================");
        return true;
    }


    public boolean handleRequest(MessageContext messageContext) {
        log.info("===============================================================================");
        return true;
    }

    public boolean handleResponse(MessageContext messageContext) {
        return mediate(messageContext, DIRECTION_OUT);
    }
}