Example usage for java.lang Runtime freeMemory

Introduction

In this page you can find the example usage for java.lang Runtime freeMemory.

Prototype

public native long freeMemory();

Source Link

Document

Returns the amount of free memory in the Java Virtual Machine.

Usage

From source file:org.onosproject.ospf.controller.impl.Controller.java

public Map<String, Long> getMemory() {
    Map<String, Long> m = new HashMap<>();
    Runtime runtime = Runtime.getRuntime();
    m.put("total", runtime.totalMemory());
    m.put("free", runtime.freeMemory());
    return m;//ww w .j a v a  2s .com
}

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From source file:onlinefrontlines.admin.web.ServerInfoAction.java

/**
  * Execute the action/*from  w w w  .  j  a v  a  2 s . c om*/
  */
protected WebView execute() throws Exception {
    Runtime r = Runtime.getRuntime();

    // Get stats
    date = new Date().toString();
    committedMemory = r.totalMemory();
    maxMemory = r.maxMemory();
    usedMemory = committedMemory - r.freeMemory();
    cpuCount = Runtime.getRuntime().availableProcessors();
    os = System.getProperty("os.name") + " (" + System.getProperty("sun.os.patch.level") + ") "
            + System.getProperty("os.arch") + " " + System.getProperty("os.version");
    jvm = System.getProperty("java.runtime.name") + " " + System.getProperty("java.runtime.version") + " "
            + System.getProperty("java.vm.name");
    for (String s : DbConnectionPool.getInstance().getDataSources().keySet())
        dataSourceStatus.put(s, getDataSourceStatus(s));
    servletContainer = servletContext.getServerInfo();

    return getSuccessView();
}

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From source file:eu.openanalytics.rsb.component.SystemHealthResource.java

@GET
@Path("/info")
@Produces({ Constants.RSB_XML_CONTENT_TYPE, Constants.RSB_JSON_CONTENT_TYPE })
public NodeInformation getInfo(@Context final ServletContext sc) {
    final NodeInformation info = Util.REST_OBJECT_FACTORY.createNodeInformation();

    info.setName(getConfiguration().getNodeName());
    info.setHealthy(nodeHealthy.get());//from ww w  .j a  va  2s.  c o  m
    info.setRsbVersion(getClass().getPackage().getImplementationVersion());
    info.setServletContainerInfo(sc.getServerInfo());

    final OperatingSystemMXBean operatingSystemMXBean = ManagementFactory.getOperatingSystemMXBean();
    info.setOsLoadAverage(operatingSystemMXBean.getSystemLoadAverage());

    final Runtime runtime = Runtime.getRuntime();
    info.setJvmMaxMemory(runtime.maxMemory());
    info.setJvmFreeMemory(runtime.freeMemory());

    final RuntimeMXBean runtimeMXBean = ManagementFactory.getRuntimeMXBean();
    final long uptimeMilliseconds = runtimeMXBean.getUptime();
    info.setUptime(uptimeMilliseconds);
    info.setUptimeText(DurationFormatUtils.formatDurationWords(uptimeMilliseconds, true, true));

    return info;
}

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From source file:imageencode.ImageEncode.java

public void decode(final String filePath, final Element node) throws IOException {
    final File imageFile = new File(filePath);
    final OutputStream os = new FileOutputStream(imageFile);
    String encodedImage = node.getTextContent();
    // String decoded = decode(encodedImage);
    // os.write(decoded);
    final Runtime runtime = Runtime.getRuntime();
    System.out.println("Free memory : " + runtime.freeMemory());
    String[] sei = encodedImage.split("\r\n");
    // System.out.println(encodedImage);
    System.out.println("Free memory : " + runtime.freeMemory());
    for (final String element : sei) {
        final byte[] byteImage = Base64.decodeBase64(element);
        try {/*from   w  w  w  . ja v a2s  . co  m*/
            os.write(byteImage);
        } catch (final FileNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
    os.close();
    System.out.println("Free memory : " + runtime.freeMemory());
    encodedImage = null;
    sei = null;
    System.gc();
    System.out.println("Free memory : " + runtime.freeMemory());
}

---

From source file:ImageEncode.java

public void decode(String filePath, Element node) throws IOException {
    final File imageFile = new File(filePath);
    final OutputStream os = new FileOutputStream(imageFile);
    String encodedImage = node.getTextContent();
    // String decoded = decode(encodedImage);
    // os.write(decoded);
    final Runtime runtime = Runtime.getRuntime();
    System.out.println("Free memory : " + runtime.freeMemory());
    String[] sei = encodedImage.split("\r\n");
    // System.out.println(encodedImage);
    System.out.println("Free memory : " + runtime.freeMemory());
    for (final String element : sei) {
        final byte[] byteImage = Base64.decodeBase64(element);
        try {/*from w w w.  j  a  v  a2  s  . c o m*/
            os.write(byteImage);
        } catch (final FileNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
    os.close();
    System.out.println("Free memory : " + runtime.freeMemory());
    encodedImage = null;
    sei = null;
    System.gc();
    System.out.println("Free memory : " + runtime.freeMemory());
}

---

From source file:ca.simplegames.micro.controllers.StatsController.java

public void execute(MicroContext context, Map configuration) throws ControllerException {
    Map<String, Object> systemInfo = new HashMap<String, Object>();
    Map<String, Object> osMap = new HashMap<String, Object>();
    MBeanServerConnection mbeanServer = ManagementFactory.getPlatformMBeanServer();

    OperatingSystemMXBean sunOperatingSystemMXBean = null;
    try {//from w w  w .  j  a  v a 2 s. c o  m
        sunOperatingSystemMXBean = ManagementFactory.newPlatformMXBeanProxy(mbeanServer,
                ManagementFactory.OPERATING_SYSTEM_MXBEAN_NAME, OperatingSystemMXBean.class);
    } catch (IOException e) {
        throw new ControllerException(e.getMessage());
    }

    Runtime rt = Runtime.getRuntime();
    long totalMemory = rt.totalMemory() / MEGA_BYTE;
    long freeMemory = rt.freeMemory() / MEGA_BYTE;
    long usedMemory = totalMemory - freeMemory;

    final long p100 = (int) Math.round(((double) freeMemory / (double) totalMemory) * 100);

    Map<String, Long> memInfo = new HashMap<String, Long>();

    memInfo.put("total", totalMemory);
    memInfo.put("used", usedMemory);
    memInfo.put("free", freeMemory);
    memInfo.put("percent_free", p100);

    systemInfo.put("memory", memInfo);
    systemInfo.put("powered_by", POWERED_BY_MICRO);

    //cpu usage in milli secs
    long currentCpuUsage = sunOperatingSystemMXBean.getProcessCpuTime() / 1000000;
    osMap.put("cpu_usage", currentCpuUsage);
    osMap.put("available_processors", sunOperatingSystemMXBean.getAvailableProcessors());
    osMap.put("system_load_average", sunOperatingSystemMXBean.getSystemLoadAverage());
    osMap.put("committed_virtual_memory_size", sunOperatingSystemMXBean.getCommittedVirtualMemorySize());
    osMap.put("free_physical_memory_size", sunOperatingSystemMXBean.getFreePhysicalMemorySize());
    osMap.put("total_physical_memory_size", sunOperatingSystemMXBean.getTotalPhysicalMemorySize());
    osMap.put("free_swap_space_size", sunOperatingSystemMXBean.getFreeSwapSpaceSize());
    osMap.put("total_swap_space_size", sunOperatingSystemMXBean.getTotalSwapSpaceSize());

    systemInfo.put("os", osMap);

    List<GarbageCollectorMXBean> gc = ManagementFactory.getGarbageCollectorMXBeans();
    List<Map> gcInfo = new ArrayList<Map>();

    for (GarbageCollectorMXBean aGc : gc) {
        Map<String, Object> gcMap = new HashMap<String, Object>();
        gcMap.put("name", aGc.getName());
        gcMap.put("collection_count", aGc.getCollectionCount());
        gcMap.put("collection_time", aGc.getCollectionTime());

        gcInfo.add(gcMap);
    }

    systemInfo.put("gc", gcInfo);

    ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();
    Map<String, Object> threadInfoMap = new HashMap<String, Object>(); // more to come ;)
    threadInfoMap.put("peak_thread_count", threadMXBean.getPeakThreadCount());
    threadInfoMap.put("thread_count", threadMXBean.getThreadCount());
    threadInfoMap.put("total_started_thread_count", threadMXBean.getTotalStartedThreadCount());

    long[] deadlockedThreads = threadMXBean.findMonitorDeadlockedThreads();
    threadInfoMap.put("dead_locked_thread_count", deadlockedThreads != null ? deadlockedThreads.length : 0);
    systemInfo.put("thread_info", threadInfoMap);

    JSONObject sysinfoJson = new JSONObject(Collections.singletonMap("system_info", systemInfo));

    String sysinfoString = null;
    try {
        sysinfoString = context.getRequest().getParameter("pretty") != null ? sysinfoJson.toString(2)
                : sysinfoJson.toString();
    } catch (JSONException e) {
        e.printStackTrace();
        throw new ControllerException(e.getMessage());
    }

    context.getRackResponse().withContentType(Mime.mimeType(JSON_TYPE)).withBody(sysinfoString)
            .withContentLength(sysinfoString.length()).with(Rack.MESSAGE_STATUS, HttpServletResponse.SC_OK);

    context.halt();
}

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From source file:edu.umn.cs.spatialHadoop.visualization.MultilevelPlot.java

public static Job plot(Path[] inPaths, Path outPath, Class<? extends Plotter> plotterClass,
        OperationsParams params) throws IOException, InterruptedException, ClassNotFoundException {
    if (params.getBoolean("showmem", false)) {
        // Run a thread that keeps track of used memory
        Thread memThread = new Thread(new Thread() {
            @Override/*from  w ww  . j  a v  a2 s . co  m*/
            public void run() {
                Runtime runtime = Runtime.getRuntime();
                while (true) {
                    try {
                        Thread.sleep(60000);
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                    runtime.gc();
                    LOG.info("Memory usage: "
                            + ((runtime.totalMemory() - runtime.freeMemory()) / (1024 * 1024 * 1024)) + "GB.");
                }
            }
        });
        memThread.setDaemon(true);
        memThread.start();
    }

    // Decide how to run it based on range of levels to generate
    String[] strLevels = params.get("levels", "7").split("\\.\\.");
    int minLevel, maxLevel;
    if (strLevels.length == 1) {
        minLevel = 0;
        maxLevel = Integer.parseInt(strLevels[0]) - 1;
    } else {
        minLevel = Integer.parseInt(strLevels[0]);
        maxLevel = Integer.parseInt(strLevels[1]);
    }
    // Create an output directory that will hold the output of the two jobs
    FileSystem outFS = outPath.getFileSystem(params);
    outFS.mkdirs(outPath);

    Job runningJob = null;
    if (OperationsParams.isLocal(params, inPaths)) {
        // Plot local
        plotLocal(inPaths, outPath, plotterClass, params);
    } else {
        int maxLevelWithFlatPartitioning = params.getInt(FlatPartitioningLevelThreshold, 4);
        if (minLevel <= maxLevelWithFlatPartitioning) {
            OperationsParams flatPartitioning = new OperationsParams(params);
            flatPartitioning.set("levels", minLevel + ".." + Math.min(maxLevelWithFlatPartitioning, maxLevel));
            flatPartitioning.set("partition", "flat");
            LOG.info("Using flat partitioning in levels " + flatPartitioning.get("levels"));
            runningJob = plotMapReduce(inPaths, new Path(outPath, "flat"), plotterClass, flatPartitioning);
        }
        if (maxLevel > maxLevelWithFlatPartitioning) {
            OperationsParams pyramidPartitioning = new OperationsParams(params);
            pyramidPartitioning.set("levels",
                    Math.max(minLevel, maxLevelWithFlatPartitioning + 1) + ".." + maxLevel);
            pyramidPartitioning.set("partition", "pyramid");
            LOG.info("Using pyramid partitioning in levels " + pyramidPartitioning.get("levels"));
            runningJob = plotMapReduce(inPaths, new Path(outPath, "pyramid"), plotterClass,
                    pyramidPartitioning);
        }
        // Write a new HTML file that displays both parts of the pyramid
        // Add an HTML file that visualizes the result using Google Maps
        LineReader templateFileReader = new LineReader(
                MultilevelPlot.class.getResourceAsStream("/zoom_view.html"));
        PrintStream htmlOut = new PrintStream(outFS.create(new Path(outPath, "index.html")));
        Text line = new Text();
        while (templateFileReader.readLine(line) > 0) {
            String lineStr = line.toString();
            lineStr = lineStr.replace("#{TILE_WIDTH}", Integer.toString(params.getInt("tilewidth", 256)));
            lineStr = lineStr.replace("#{TILE_HEIGHT}", Integer.toString(params.getInt("tileheight", 256)));
            lineStr = lineStr.replace("#{MAX_ZOOM}", Integer.toString(maxLevel));
            lineStr = lineStr.replace("#{MIN_ZOOM}", Integer.toString(minLevel));
            lineStr = lineStr.replace("#{TILE_URL}", "(zoom <= " + maxLevelWithFlatPartitioning
                    + "? 'flat' : 'pyramid')+('/tile-' + zoom + '-' + coord.x + '-' + coord.y + '.png')");

            htmlOut.println(lineStr);
        }
        templateFileReader.close();
        htmlOut.close();
    }

    return runningJob;
}

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From source file:com.gargoylesoftware.htmlunit.javascript.configuration.JavaScriptConfigurationTest.java

private String getMemoryStats() {
    final Runtime rt = Runtime.getRuntime();
    final long free = rt.freeMemory() / 1024;
    final long total = rt.totalMemory() / 1024;
    final long max = rt.maxMemory() / 1024;
    final long used = total - free;
    final String format = "used: {0,number,0}K, free: {1,number,0}K, total: {2,number,0}K, max: {3,number,0}K";
    return MessageFormat.format(format, Long.valueOf(used), Long.valueOf(free), Long.valueOf(total),
            Long.valueOf(max));// w ww. ja  v  a2  s .c o  m
}

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From source file:com.amazonaws.metrics.internal.cloudwatch.MachineMetricFactory.java

private void addMemoryMetrics(List<MetricDatum> targetList, Set<MachineMetric> customSet) {
    Runtime rt = Runtime.getRuntime();
    long totalMem = rt.totalMemory();
    long freeMem = rt.freeMemory();
    long usedMem = totalMem - freeMem;
    long spareMem = rt.maxMemory() - usedMem;
    List<Long> values = Arrays.asList(totalMem, freeMem, usedMem, spareMem);
    MetricValues metricValues = memoryMetricValues(customSet, values);
    addMetrics(targetList, metricValues, StandardUnit.Bytes);
}

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From source file:models.monitor.MonitorProvider.java

public PerformUsage getJVMMemoryUsage() {
    int mb = 1024 * 1024;
    Runtime rt = Runtime.getRuntime();
    PerformUsage usage = new PerformUsage();
    usage.totalMemory = (double) rt.totalMemory() / mb;
    usage.freeMemory = (double) rt.freeMemory() / mb;
    usage.usedMemory = (double) rt.totalMemory() / mb - rt.freeMemory() / mb;
    usage.maxMemory = (double) rt.maxMemory() / mb;
    usage.memoryUsagePercent = usage.usedMemory / usage.totalMemory * 100.0;

    //            new BigDecimal().setScale(2) .divide(new BigDecimal(usage.totalMemory).setScale(2), RoundingMode.DOWN)
    //                                                  .setScale(2)
    //                                                  .multiply(new BigDecimal(100)).intValue();

    // update current
    currentJvmPerformUsage = usage;/*from  ww  w  .j  a  v  a 2 s  .  c  om*/
    return usage;
}

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