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Jersey SSE Twitter Message Aggregator Example.
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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 2012 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * http://glassfish.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at packager/legal/LICENSE.txt.
 *
 * GPL Classpath Exception:
 * Oracle designates this particular file as subject to the "Classpath"
 * exception as provided by Oracle in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
 * "Portions Copyright [year] [name of copyright owner]"
 *
 * Contributor(s):
 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above.  However, if you add GPL Version 2 code
 * and therefore, elected the GPL Version 2 license, then the option applies
 * only if the new code is made subject to such option by the copyright
 * holder.
 */
"use strict";

function receiveMessages() {
    if (typeof(EventSource) !== "undefined") {
        // Yes! Server-sent events support!
        var source = new EventSource('/aggregator-api/message/stream');
        source.onmessage = function (event) {
            var data = JSON.parse(event.data);
            console.log(data);

            var newEntry =
                ''
                    + ''
                    + ''
                    + data.text + '';

            document.body.innerHTML = newEntry + document.body.innerHTML;
        };

        source.onopen = function (event) {
            // Connection was opened.
            console.log('opened')
        };

        source.onclose = function (event) {
            // Connection was closed.
            console.log('connection closed')
        };
    } else {
        // Sorry! No server-sent events support..
        console.log('SSE not supported by browser.')
    }
}

window.onload = receiveMessages ;