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 /*
  * 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.dcsquare.hivemq.spi.callback.events;
Gets called when a com.dcsquare.hivemq.spi.message.SUBSCRIBE message arrives

When a subscription was invalid it's possible to throw a com.dcsquare.hivemq.spi.callback.exception.InvalidSubscriptionException.

Please note that the recommended way to handle Topic Permissions is to use the com.dcsquare.hivemq.spi.callback.security.OnAuthorizationCallback.

Author(s):
Dominik Obermaier
Since:
1.4
public interface OnSubscribeCallback extends SynchronousCallback {


    
Called when a com.dcsquare.hivemq.spi.message.SUBSCRIBE message arrives.

Parameters:
message the SUBSCRIBE message
clientData the information about the client
Throws:
com.dcsquare.hivemq.spi.callback.exception.InvalidSubscriptionException when a subscription was invalid
    void onSubscribe(SUBSCRIBE messageClientData clientDatathrows InvalidSubscriptionException;
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