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.ktunaxa.referral.server.service.SystemService.java

@Scheduled(fixedRate = 2000)
public void showLog() {
    int mb = 1024 * 1024;

    // Getting the runtime reference from system
    Runtime runtime = Runtime.getRuntime();

    log.info("##### Heap utilization statistics [MB] #####");

    // Print used memory
    log.info("Used Memory:" + (runtime.totalMemory() - runtime.freeMemory()) / mb);

    // Print free memory
    log.info("Free Memory:" + runtime.freeMemory() / mb);

    // Print total available memory
    log.info("Total Memory:" + runtime.totalMemory() / mb);

    // Print Maximum available memory
    log.info("Max Memory:" + runtime.maxMemory() / mb);
}

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From source file:it.damore.tomee.envmonitor.services.EnvMonitorService.java

@GET
@Path("monitor")
@Produces({ MediaType.APPLICATION_JSON })
public EnvironmentConfig getEnvConfig() throws IllegalAccessException, InvocationTargetException {
    logger.info("received a request...");

    int mb = 1024 * 1024;
    //Getting the runtime reference from system
    Runtime runtime = Runtime.getRuntime();

    EnvironmentConfig b = new EnvironmentConfig();
    b.setMaxMemory(runtime.maxMemory() / mb);
    b.setFreeMemory(runtime.freeMemory() / mb);
    b.setTotalMemory(runtime.totalMemory() / mb);
    b.setSystemProperties(System.getProperties());

    RuntimeMXBean runtimeMXBean = ManagementFactory.getRuntimeMXBean();
    LocalRuntimeMXBean myRuntimeMXBean = new LocalRuntimeMXBean();
    BeanUtils.copyProperties(myRuntimeMXBean, runtimeMXBean);
    b.setRuntimeMXBean(myRuntimeMXBean);

    MemoryMXBean memoryMXBean = ManagementFactory.getMemoryMXBean();
    LocalMemoryMXBean myMemoryMXBean = new LocalMemoryMXBean();
    myMemoryMXBean.setHeapMemoryUsage(memoryMXBean.getHeapMemoryUsage());
    myMemoryMXBean.setNonHeapMemoryUsage(memoryMXBean.getNonHeapMemoryUsage());
    myMemoryMXBean.setObjectPendingFinalizationCount(memoryMXBean.getObjectPendingFinalizationCount());
    b.setMemoryMXBean(myMemoryMXBean);//from ww  w  .java2  s.c o  m

    OperatingSystemMXBean operatingSystemMXBean = ManagementFactory.getOperatingSystemMXBean();
    LocalOperatingSystemMXBean myOperatingSystemMXBean = new LocalOperatingSystemMXBean();
    BeanUtils.copyProperties(myOperatingSystemMXBean, operatingSystemMXBean);
    b.setOperatingSystemMXBean(myOperatingSystemMXBean);

    return b;
}

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From source file:org.gedantic.web.servlet.FileUploadHandler.java

@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {
    LOG.debug(">doPost");

    // process only if its multipart content
    if (ServletFileUpload.isMultipartContent(request)) {
        try {//from  ww  w.  ja v a  2s.com
            List<FileItem> multiparts = new ServletFileUpload(new DiskFileItemFactory()).parseRequest(request);
            long length = 0;
            for (FileItem item : multiparts) {
                if (!item.isFormField()) {
                    if (!item.getName().toLowerCase().endsWith(".ged")
                            && !item.getName().toLowerCase().endsWith(".gedcom")) {
                        LOG.info("Upload file " + item.getName() + " doesn't end in .ged or .gedcom");
                        throw new RuntimeException(
                                "Upload file " + item.getName() + " doesn't end in .ged or .gedcom");
                    }
                    if (item.getSize() > MAX_MB * 1024 * 1024) {
                        LOG.info("Upload file " + item.getName() + " exceeds " + MAX_MB + "MB limit - was "
                                + item.getSize());
                        throw new RuntimeException("Upload file " + item.getName() + " exceeds " + MAX_MB
                                + "MB limit - was " + item.getSize());
                    }
                    String name = new File(item.getName()).getName();
                    String fullPathAndName = UPLOAD_DIRECTORY + File.separator + name;
                    File file = new File(fullPathAndName);
                    item.write(file);
                    length = file.length();
                    LOG.info("Wrote " + fullPathAndName + " (" + length + " bytes)");

                    new ParserAndLoader(request, response, file).parseAndLoadIntoSession();
                }
            }
        } catch (RuntimeException ex) {
            LOG.error("Unable to upload file: " + ex.getMessage());
            response.setStatus(403);
        } catch (Exception ex) {
            LOG.error("Unable to upload file: ", ex);
            response.setStatus(403);
        }
    }

    Runtime rt = Runtime.getRuntime();
    long maxMemory = rt.maxMemory();
    long freeMemory = rt.freeMemory();
    LOG.info("fileUploaded - freeMemory:" + Double.toString(freeMemory / (1024 * 1024)) + " maxMemory:"
            + Double.toString(maxMemory / (1024 * 1024)));

    LOG.debug("<doPost");
}

---

From source file:org.sakaiproject.content.impl.serialize.impl.test.ProfileSerializerTest.java

/**
 * Test method for/*from  w  w w.ja  v  a2 s  .c  o  m*/
 * {@link org.sakaiproject.content.impl.serialize.impl.Type1BaseContentCollectionSerializer#parse(org.sakaiproject.entity.api.serialize.SerializableEntity, java.lang.String)}.
 * 
 * @throws Exception
 */
@Test
public final void testParse() throws Exception {
    Type1BaseContentCollectionSerializer t1 = new Type1BaseContentCollectionSerializer();
    t1.setTimeService(new MockTimeService());
    MockSerializableCollectionAcccess sc = new MockSerializableCollectionAcccess();
    byte[] serialized = null;
    Runtime r = Runtime.getRuntime();
    r.gc();
    Thread.sleep(2000);
    {
        long start = System.currentTimeMillis();
        long ms = r.freeMemory();
        for (int i = 0; i < 16000; i++) {
            serialized = t1.serialize(sc);
        }
        long me = r.freeMemory();
        long m = ms - me;
        long end = System.currentTimeMillis();
        long t = (end - start);
        log.info("Write 16000 Entities took " + t + "ms ");
        log.info("Write 16000 Entities took " + (t * 1000) / 16000 + " us/entity ");
        log.info("Write 16000 Entities took " + m + " bytes overhead ");
        log.info("Write 16000 Entities took " + (m / 16000) + " bytes/entity overhead ");
    }
    r.gc();
    Thread.sleep(2000);
    {
        long start = System.currentTimeMillis();
        long ms = r.freeMemory();
        for (int i = 0; i < 16000; i++) {
            t1.parse(sc, serialized);
        }
        long me = r.freeMemory();
        long m = ms - me;
        long end = System.currentTimeMillis();
        long t = (end - start);
        log.info("Read 16000 Entities took " + t + "ms ");
        log.info("Read 16000 Entities took " + (t * 1000) / 16000 + " us/entity ");
        log.info("Read 16000 Entities took " + m + " bytes overhead ");
        log.info("Read 16000 Entities took " + (m / 16000) + " bytes/entity overhead ");
    }
    sc.check();
}

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From source file:org.polymap.core.model2.test.SimpleModelTest.java

protected void logHeap() {
    System.gc();//  ww w . j  av  a2  s . c om
    Runtime rt = Runtime.getRuntime();
    log.info("HEAP: free/total: " + FileUtils.byteCountToDisplaySize(rt.freeMemory()) + " / "
            + FileUtils.byteCountToDisplaySize(rt.totalMemory()));
}

---

From source file:io.cloudslang.worker.management.monitor.WorkerMonitorsImpl.java

@Override
public synchronized Map<WorkerMonitorInfoEnum, Serializable> getMonitorInfo() {
    try {// ww  w  . j  ava2 s .c  o  m
        Map<WorkerMonitorInfoEnum, Serializable> monitorInfo = Maps.newHashMap();

        Runtime runtime = Runtime.getRuntime();
        monitorInfo.put(WorkerMonitorInfoEnum.TOTAL_MEMORY, runtime.totalMemory());
        monitorInfo.put(WorkerMonitorInfoEnum.FREE_MEMORY, runtime.freeMemory());
        monitorInfo.put(WorkerMonitorInfoEnum.MAX_MEMORY, runtime.maxMemory());

        monitorInfo.put(WorkerMonitorInfoEnum.WORKER_ID, workerManager.getWorkerUuid());

        monitorInfo.put(WorkerMonitorInfoEnum.EXECUTION_THREADS_AMOUNT,
                workerManager.getExecutionThreadsCount());

        monitorInfo.put(WorkerMonitorInfoEnum.OUTBUFFER_CAPACITY, outBuffer.getCapacity());

        monitorInfo.put(WorkerMonitorInfoEnum.INBUFFER_CAPACITY, inBuffer.getCapacity());

        for (WorkerMonitor monitor : monitors) {
            monitor.captureMonitorInfo(monitorInfo);
        }

        monitorInfo.put(WorkerMonitorInfoEnum.MONITOR_START_TIME, monitorStartTime);
        monitorInfo.put(WorkerMonitorInfoEnum.MONITOR_END_TIME, System.currentTimeMillis());

        return monitorInfo;
    } finally {
        resetMonitor();
    }
}

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From source file:org.apache.pulsar.common.stats.JvmMetrics.java

public List<Metrics> generate() {

    Metrics m = createMetrics();//from   w ww  .ja v a2s. c o  m

    Runtime r = Runtime.getRuntime();

    m.put("jvm_heap_used", r.totalMemory() - r.freeMemory());
    m.put("jvm_max_memory", r.maxMemory());
    m.put("jvm_total_memory", r.totalMemory());

    m.put("jvm_direct_memory_used", getJvmDirectMemoryUsed());
    m.put("jvm_max_direct_memory", PlatformDependent.maxDirectMemory());
    m.put("jvm_thread_cnt", getThreadCount());

    this.gcLogger.logMetrics(m);

    long totalAllocated = 0;
    long totalUsed = 0;

    for (PoolArenaMetric arena : PooledByteBufAllocator.DEFAULT.directArenas()) {
        for (PoolChunkListMetric list : arena.chunkLists()) {
            for (PoolChunkMetric chunk : list) {
                int size = chunk.chunkSize();
                int used = size - chunk.freeBytes();

                totalAllocated += size;
                totalUsed += used;
            }
        }
    }

    m.put(this.componentName + "_default_pool_allocated", totalAllocated);
    m.put(this.componentName + "_default_pool_used", totalUsed);

    return Lists.newArrayList(m);
}

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From source file:com.kyne.webby.bukkit.RTKModuleSocket.java

private void getInfos(final Map<String, Object> responseParams) {
    final List<WebbyPlayer> playerList = new ArrayList<WebbyPlayer>();
    for (final Player player : Bukkit.getOnlinePlayers()) {
        playerList.add(new WebbyPlayer(player.getName(), player.isOp()));
    }//ww w . j  av  a2  s. c  om
    final Runtime runtime = Runtime.getRuntime();
    final long freeMemory = runtime.freeMemory();
    final long totalMemory = runtime.totalMemory();
    final long maxMemory = runtime.maxMemory();
    final int mb = 1024 * 1024;

    final ServerInfos serverInfos = new ServerInfos(Bukkit.getVersion(), Bukkit.getMaxPlayers(),
            playerList.size(), playerList, freeMemory / mb, totalMemory / mb, maxMemory / mb);
    responseParams.put("DATA", serverInfos);
}

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From source file:org.ngrinder.operation.cotroller.StatisticsController.java

/**
 * Get current jvm stat/*from  w  w  w  .  java 2s  .c om*/
 * 
 * @return map for jvm used/free/total/max
 */
private Map<String, Long> getJVMStat() {
    Runtime runtime = Runtime.getRuntime();

    Map<String, Long> stat = new HashMap<String, Long>();
    stat.put("used", runtime.totalMemory() - runtime.freeMemory());
    stat.put("free", runtime.freeMemory());
    stat.put("total", runtime.totalMemory());
    stat.put("max", runtime.maxMemory());

    return stat;
}

---

From source file:org.gedantic.web.servlet.AnalyzerServlet.java

/**
 * Servlet for handling all analysis requests
 * // w  w  w. j  a  v  a  2s  .  c om
 * @param req
 *            the http request
 * @param resp
 *            the http response
 * @throws ServletException
 *             if there is a code-related problemDescription
 * @throws IOException
 *             if there is a network or storage-related problemDescription
 */
private void process(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
    HttpSession session = req.getSession();
    Gedcom g = (Gedcom) session.getAttribute(Constants.GEDCOM);
    IAnalyzer a = null;

    String analyzerId = req.getParameter("analyzerId");
    if (analyzerId != null) {
        a = AnalyzerList.getInstance().getAnalyzers().get(analyzerId);
        req.setAttribute(Constants.ANALYSIS_ID, a.getId());
        req.setAttribute(Constants.ANALYSIS_NAME, a.getName());
        req.setAttribute(Constants.ANALYSIS_DESCRIPTION, a.getDescription());
    }

    if (g == null) {
        LOG.info("Redirecting from " + req.getRequestURI()
                + " to upload page because there is no gedcom in session");
        req.setAttribute(Constants.ALERT_MESSAGE, "Please upload a GEDCOM to analyze");
        req.setAttribute(Constants.ALERT_MESSAGE_TYPE, "alert alert-warning");
        req.getRequestDispatcher(Constants.URL_UPLOAD_PAGE).forward(req, resp);
        return;
    }

    if (a == null) {
        LOG.info("Redirecting from " + req.getRequestURI()
                + " to upload page because the analysis ID could not be interpreted");
        req.setAttribute(Constants.ALERT_MESSAGE, "Unknown analysis type");
        req.setAttribute(Constants.ALERT_MESSAGE_TYPE, "alert alert-danger");
        req.getRequestDispatcher(Constants.URL_UPLOAD_PAGE).forward(req, resp);
        return;

    }

    Runtime rt = Runtime.getRuntime();
    long maxMemory = rt.maxMemory();
    long freeMemory = rt.freeMemory();
    LOG.info("before analysis " + a.getId() + " - freeMemory:" + Double.toString(freeMemory / (1024 * 1024))
            + " maxMemory:" + Double.toString(maxMemory / (1024 * 1024)));

    List<AnalysisResult> results = a.analyze(g);
    Collections.sort(results, new AnalysisResultComparator());

    maxMemory = rt.maxMemory();
    freeMemory = rt.freeMemory();
    LOG.info("after analysis " + a.getId() + " - freeMemory:" + Double.toString(freeMemory / (1024 * 1024))
            + " maxMemory:" + Double.toString(maxMemory / (1024 * 1024)));

    if ("true".equals(req.getParameter("excel"))) {
        @SuppressWarnings("resource")
        Workbook wb = new WorkbookCreator(a, results).create();

        resp.setContentType("application/vnd.ms-excel");
        resp.setHeader("Content-disposition",
                "attachment; filename=" + StringEscapeUtils.escapeHtml(a.getName() + ".xlsx"));

        wb.write(resp.getOutputStream());
        resp.getOutputStream().flush();

    } else {
        req.setAttribute(Constants.RESULTS, results);
        req.getRequestDispatcher("results.tiles").forward(req, resp);
    }
}

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