ActiveMQ example source code file (portfolio.js)

This example ActiveMQ source code file (portfolio.js) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - ActiveMQ tags/keywords

connection, connection

The ActiveMQ portfolio.js source code

/**
 * 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.
 */

// updates the portfolio row for a given message and symbol
function updatePortfolioRow(message, destination) {

    var priceMessage = message.documentElement

    var price = parseFloat(priceMessage.getAttribute('bid'))
    var symbol = priceMessage.getAttribute('stock')
    var movement = priceMessage.getAttribute('movement')
    if (movement == null) {
        movement = 'up'
    }

    var row = document.getElementById(symbol)
    
    // perform portfolio calculations
    var value = asFloat(find(row, 'amount')) * price
    var pl = value - asFloat(find(row, 'cost'))
    
    // now lets update the HTML DOM
    find(row, 'price').innerHTML = fixedDigits(price, 2)
    find(row, 'value').innerHTML = fixedDigits(value, 2)
    find(row, 'pl').innerHTML    = fixedDigits(pl, 2)
    find(row, 'price').className = movement
    find(row, 'pl').className    = pl >= 0 ? 'up' : 'down'
}

var connection = new Connection("jms/STOCKS/*")

function subscribe() {
    connection.addMessageListener(/^STOCKS\..*$/, updatePortfolioRow)
}