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The Service Provider Interfaces for developing HiveMQ plugins.

There is a newer version: 3.4.4

/*
 * Copyright 2014 dc-square GmbH
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.hivemq.spi.callback.lowlevel;

import com.hivemq.spi.callback.AsynchronousCallback;
import com.hivemq.spi.callback.LowlevelCallback;
import com.hivemq.spi.security.ClientData;

/**
 * The OnPingCallback which gets called after a client sent a PINGREQ message
 *
 * @author Christian Goetz
 * @since 1.4
 */
public interface OnPingCallback extends AsynchronousCallback, LowlevelCallback {

    /**
     * This method gets called after the broker received a PINGREQ message from a client.
     * 
     * This callback does not allow to interfere with the heartbeat mechanism and is for information
     * purposes only.
     *
     * @param clientData the ClientData of the client which sent the PINGREQ message
     */
    void onPingReceived(ClientData clientData);
}