MetricsOutInterceptor.java

/**
 * Copyright (c) Codice Foundation
 * <p>
 * This is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser
 * General Public License as published by the Free Software Foundation, either version 3 of the
 * License, or any later version.
 * <p>
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
 * even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details. A copy of the GNU Lesser General Public License
 * is distributed along with this program and can be found at
 * <http://www.gnu.org/licenses/lgpl.html>.
 */
package ddf.metrics.interceptor;

import org.apache.cxf.interceptor.Fault;
import org.apache.cxf.message.Exchange;
import org.apache.cxf.message.Message;
import org.apache.cxf.phase.AbstractPhaseInterceptor;
import org.apache.cxf.phase.Phase;

/**
 *
 * CXF out interceptor used to capture HTTP message latency metrics.
 *
 * The {@link MetricsInInterceptor} records the time that a message is received and the out
 * interceptor calculates the total time and saves the result.
 *
 * @author willisod
 *
 */
public class MetricsOutInterceptor extends AbstractMetricsInterceptor {

    private OneWayMessageEndingInterceptor ending = new OneWayMessageEndingInterceptor();

    public MetricsOutInterceptor() {
        super(Phase.SEND);
    }

    /**
     * Handle the out message, including one way messages. Methods on
     * {@link AbstractMetricsInterceptor} are used to get the numbers and save them to YAMMER
     * objects.
     *
     */
    @Override
    public void handleMessage(Message message) throws Fault {

        Exchange ex = message.getExchange();

        if (Boolean.TRUE.equals(message.get(Message.PARTIAL_RESPONSE_MESSAGE))) {
            return;
        }

        if (isClient(message)) {
            if (ex.isOneWay()) {
                message.getInterceptorChain()
                        .add(ending);
            }

            beginHandlingMessage(ex);

        } else {
            endHandlingMessage(ex);
        }
    }

    OneWayMessageEndingInterceptor getEndingInterceptor() {

        return ending;

    }

    public class OneWayMessageEndingInterceptor extends AbstractPhaseInterceptor<Message> {

        public OneWayMessageEndingInterceptor() {
            super(Phase.PREPARE_SEND_ENDING);
        }

        public void handleMessage(Message message) throws Fault {
            Exchange ex = message.getExchange();
            endHandlingMessage(ex);
        }

        public void handleFault(Message message) throws Fault {
            Exchange ex = message.getExchange();
            endHandlingMessage(ex);
        }

    }

}