org.wicketTutorial.chatExample.ChatRoomPanel.java Source code

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Here is the source code for org.wicketTutorial.chatExample.ChatRoomPanel.java

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/**
 *  Licensed to the Apache Software Foundation (ASF) under one or more
 *  contributor license agreements.  See the NOTICE file distributed with
 *  this work for additional information regarding copyright ownership.
 *  The ASF 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.wicketTutorial.chatExample;

import java.util.Map;

import org.apache.wicket.Component;
import org.apache.wicket.markup.head.HeaderItem;
import org.apache.wicket.markup.head.IHeaderResponse;
import org.apache.wicket.markup.head.JavaScriptContentHeaderItem;
import org.apache.wicket.markup.head.OnEventHeaderItem;
import org.apache.wicket.markup.html.panel.Panel;
import org.apache.wicket.protocol.ws.jee.AbstractWebsocketBehavior;
import org.apache.wicket.request.Url;
import org.apache.wicket.util.lang.Generics;
import org.apache.wicket.util.template.PackageTextTemplate;

public class ChatRoomPanel extends Panel {

    public ChatRoomPanel(String id) {
        super(id);

        add(new AbstractWebsocketBehavior(false) {
            @Override
            protected Url getSocketCreationURL() {
                Url url = getContextPathURL();
                url.getSegments().add("chat");

                return url;
            }

            @Override
            public void renderHead(Component component, IHeaderResponse response) {
                super.renderHead(component, response);

                Map<String, Object> variables = Generics.newHashMap();
                variables.put("componentId", component.getMarkupId());

                PackageTextTemplate webSocketSetupTemplate = new PackageTextTemplate(ChatRoomPanel.class,
                        "ChatRoomPanel.template.js");
                response.render(
                        JavaScriptContentHeaderItem.forScript(webSocketSetupTemplate.asString(variables), null));
            }

            @Override
            protected CharSequence onMessageJsFunction() {
                return "onChatMessage(evt)";
            }

            @Override
            protected CharSequence onOpenJsFunction() {
                return "joinMessage()";
            }

            @Override
            protected CharSequence onErrorJsFunction() {
                return "";
            }

            @Override
            protected HeaderItem wrapSocketCreationScript(PackageTextTemplate template,
                    Map<String, Object> variables) {
                return OnEventHeaderItem.forScript("'joinButton'", "click", template.asString(variables));
            }

        });
    }

}