/*
 *  Copyright (c) 2017, WSO2 Inc. (http://www.wso2.org) All Rights Reserved.
 *
 *  WSO2 Inc. licenses this file to you 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 org.wso2.carbon.connector.framework.websocket;

/**
 * Observable for WebSocket server connector.
 */
public interface WebSocketObservable {

    /**
     * Set the {@link WebSocketObserver} for the Observable.
     *
     * @param observer for the given Observable.
     */
    void setObserver(WebSocketObserver observer);

    /**
     * Retrieve the related observer.
     *
     * @return the related observer.
     */
    WebSocketObserver getObserver();

    /**
     * Check whether there is a observer presents in the Observable.
     * @return
     */
    boolean hasObserver();

    /**
     * Remove the observer from the Observable.
     *
     * @param observer {@link WebSocketObserver} which should be removed.
     */
    void removeObserver(WebSocketObserver observer);
}

/*
 *  Copyright (c) 2017, WSO2 Inc. (http://www.wso2.org) All Rights Reserved.
 *
 *  WSO2 Inc. licenses this file to you 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 org.wso2.carbon.connector.framework.websocket;

/**
 * Observable for WebSocket server connector.
 */
public interface WebSocketObservable {

    /**
     * Set the {@link WebSocketObserver} for the Observable.
     *
     * @param observer for the given Observable.
     */
    void setObserver(WebSocketObserver observer);

    /**
     * Retrieve the related observer.
     *
     * @return the related observer.
     */
    WebSocketObserver getObserver();

    /**
     * Check whether there is a observer presents in the Observable.
     * @return true if {@link WebSocketObserver} is present.
     */
    boolean hasObserver();

    /**
     * Remove the observer from the Observable.
     *
     * @param observer {@link WebSocketObserver} which should be removed.
     */
    void removeObserver(WebSocketObserver observer);
}

Implement WebSocketObservable