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Java example source code file (memmonitor.js)
The memmonitor.js Java example source code/* * Copyright (c) 2006, 2013, Oracle and/or its affiliates. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * - Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * - Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * - Neither the name of Oracle nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ /* * This source code is provided to illustrate the usage of a given feature * or technique and has been deliberately simplified. Additional steps * required for a production-quality application, such as security checks, * input validation and proper error handling, might not be present in * this sample code. */ // this checker function runs asynchronously function memoryChecker(memoryBean, threshold, interval) { while (true) { var memUsage = memoryBean.HeapMemoryUsage; var usage = memUsage.get("used") / (1024 * 1024); println("usage: " + usage); if (usage > threshold) { alert("Hey! heap usage threshold exceeded!"); // after first alert just return. return; } java.lang.Thread.sleep(interval); } } // add "Tools->Memory Monitor" menu item if (this.application != undefined) { this.application.addTool("Memory Monitor", function () { // show threshold box with default of 50 MB var threshold = prompt("Threshold (mb)", 50); // show interval box with default of 1000 millisec. var interval = prompt("Sample Interval (ms):", 1000); var memoryBean = mbean("java.lang:type=Memory"); // ".future" makes the function to be called // asynchronously in a separate thread. memoryChecker.future(memoryBean, threshold, interval); }); } Other Java examples (source code examples)Here is a short list of links related to this Java memmonitor.js source code file: |
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