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:com.viettel.logistic.wms.business.KpiLogBusiness.java

private void checkMemory(String functionName, String transactionCode) {

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

    System.out.println("##### Heap utilization statistics [MB] #####");
    System.out.println("##### Transaction code = " + transactionCode + " #####");

    //Print used memory
    System.out.println(functionName + " Used Memory:" + (runtime.totalMemory() - runtime.freeMemory()) / mb);

    //Print free memory
    System.out.println(functionName + " Free Memory:" + runtime.freeMemory() / mb);

    //Print total available memory
    System.out.println(functionName + " Total Memory:" + runtime.totalMemory() / mb);

    //Print Maximum available memory
    System.out.println(functionName + " Max Memory:" + runtime.maxMemory() / mb);

}

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From source file:ffx.ui.UIDataConverter.java

/**
 * Rather verbose output for timed File Operations makes it easy to grep log
 * files for specific information./*www . j a  va  2 s  .  co m*/
 */
private void startTimer() {
    Runtime runtime = Runtime.getRuntime();
    if (gc) {
        runtime.runFinalization();
        runtime.gc();
    }
    occupiedMemory = runtime.totalMemory() - runtime.freeMemory();
    time -= System.nanoTime();
}

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From source file:org.exem.flamingo.web.util.ApplicationInformationDisplayContextListener.java

@Override
public void contextInitialized(ServletContextEvent servletContextEvent) {
    System.setProperty("PID", SystemUtils.getPid());

    Properties properties = new Properties();
    ServletContext context = servletContextEvent.getServletContext();
    InputStream inputStream = null;
    try {/*w  w  w.  ja v  a2  s. co m*/
        inputStream = context.getResourceAsStream("/WEB-INF/app.properties");
        properties.load(inputStream);
    } catch (Exception ex) {
        throw new IllegalArgumentException("Cannot load a '/WEB/INF/app.properties' file.", ex);
    } finally {
        IOUtils.closeQuietly(inputStream);
    }

    // See : http://patorjk.com/software/taag/#p=display&f=Slant&t=Flamingo
    StringBuilder builder = new StringBuilder();
    builder.append("    ________                _                 \n"
            + "   / ____/ /___ _____ ___  (_)___  ____ _____ \n"
            + "  / /_  / / __ `/ __ `__ \\/ / __ \\/ __ `/ __ \\\n"
            + " / __/ / / /_/ / / / / / / / / / / /_/ / /_/ /\n"
            + "/_/   /_/\\__,_/_/ /_/ /_/_/_/ /_/\\__, /\\____/ \n"
            + "                                /____/        ");

    printHeader(builder, "Application Information");
    Properties appProps = new Properties();
    appProps.put("Instance", StringUtils.isEmpty(System.getProperty("instance")) ? "** UNKNOWN **"
            : System.getProperty("instance"));
    appProps.put("Version", properties.get("version"));
    appProps.put("Build Date", properties.get("build.timestamp"));
    appProps.put("Build Number", properties.get("build.number"));
    appProps.put("Revision Number", properties.get("revision.number"));
    appProps.put("Organization", properties.get("organization"));
    appProps.put("Homepage", properties.get("homepage"));

    if (context != null) {
        appProps.put("Application Server", context.getServerInfo() + " - Servlet API "
                + context.getMajorVersion() + "." + context.getMinorVersion());
    }

    Properties systemProperties = System.getProperties();
    appProps.put("Java Version", systemProperties.getProperty("java.version", UNKNOWN) + " - "
            + systemProperties.getProperty("java.vendor", UNKNOWN));
    appProps.put("Current Working Directory", systemProperties.getProperty("user.dir", UNKNOWN));

    print(builder, appProps);

    Properties memPros = new Properties();
    final Runtime rt = Runtime.getRuntime();
    final long maxMemory = rt.maxMemory() / MEGA_BYTES;
    final long totalMemory = rt.totalMemory() / MEGA_BYTES;
    final long freeMemory = rt.freeMemory() / MEGA_BYTES;
    final long usedMemory = totalMemory - freeMemory;

    memPros.put("Maximum Allowable Memory", maxMemory + "MB");
    memPros.put("Total Memory", totalMemory + "MB");
    memPros.put("Free Memory", freeMemory + "MB");
    memPros.put("Used Memory", usedMemory + "MB");

    print(builder, memPros);

    printHeader(builder, "Java System Properties");
    Properties sysProps = new Properties();
    for (final Map.Entry<Object, Object> entry : systemProperties.entrySet()) {
        sysProps.put(entry.getKey(), entry.getValue());
    }

    print(builder, sysProps);

    printHeader(builder, "System Environments");
    Map<String, String> envs = System.getenv();
    Properties envProps = new Properties();
    Set<String> strings = envs.keySet();
    for (String key : strings) {
        String message = envs.get(key);
        envProps.put(key, message);
    }

    print(builder, envProps);

    WebLogbackConfigurer.initLogging(servletContextEvent.getServletContext());

    System.out.println(builder.toString());

    logger.info("============================================================");
    logger.info(" Now starting ..... PID: " + SystemUtils.getPid());
    logger.info("============================================================");
}

---

From source file:org.apache.maven.cli.event.ExecutionEventLogger.java

private void logStats(MavenSession session) {
    logger.info(chars('-', LINE_LENGTH));

    long finish = System.currentTimeMillis();

    long time = finish - session.getRequest().getStartTime().getTime();

    String wallClock = session.getRequest().getDegreeOfConcurrency() > 1 ? " (Wall Clock)" : "";

    logger.info("Total time: " + formatDuration(time) + wallClock);

    logger.info("Finished at: " + formatTimestamp(finish));

    System.gc();//www  .j a va2s  .c  o m

    Runtime r = Runtime.getRuntime();

    long mb = 1024 * 1024;

    logger.info("Final Memory: " + (r.totalMemory() - r.freeMemory()) / mb + "M/" + r.totalMemory() / mb + "M");
}

---

From source file:com.h3xstream.findbugs.test.BaseDetectorTest.java

@AfterClass
public void after() {
    System.gc();/*from  w  w w  . j  av a2  s .  com*/
    if (DEBUG) {
        Runtime rt = Runtime.getRuntime();
        long inMb = 1024 * 1024;
        log.info("=== Memory info (Process " + ManagementFactory.getRuntimeMXBean().getName() + ") ===");
        log.info("Total memory : " + rt.totalMemory() / inMb);
        log.info("Free memory  : " + rt.freeMemory() / inMb);
        log.info("Memory usage : " + (rt.totalMemory() - rt.freeMemory()) / inMb);
        log.info("===================");
    }

    //        for(Object mock : mocksToReset) {
    //            reset(mock);
    //        }
    //        mocksToReset.clear();
}

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From source file:org.alfresco.repo.content.transform.TikaPoweredContentTransformer.java

private String calculateMemoryAndTimeUsage(ContentReader reader, long startTime) {
    long endTime = System.currentTimeMillis();
    Runtime runtime = Runtime.getRuntime();
    long totalMemory = runtime.totalMemory();
    return String.format(USAGE_PATTERN, this.getClass().getName(), reader,
            (totalMemory - runtime.freeMemory()) / MEGABYTES, totalMemory / MEGABYTES,
            runtime.maxMemory() / MEGABYTES, (endTime - startTime));
}

---

From source file:ffx.ui.UIDataConverter.java

private void stopTimer(FFXSystem ffxSystem) {
    time += System.nanoTime();//from   w w  w.  j a v a 2s  . co m
    logger.log(Level.INFO, " Opened {0} with {1} atoms.\n File Op Time  (msec): {2}",
            new Object[] { ffxSystem.toString(), ffxSystem.getAtomList().size(), time * 1.0e-9 });
    Runtime runtime = Runtime.getRuntime();
    if (gc) {
        runtime.runFinalization();
        runtime.gc();
        long moleculeMemory = (runtime.totalMemory() - runtime.freeMemory()) - occupiedMemory;
        logger.log(Level.INFO, " System Memory  (Kb): {0}", moleculeMemory / KB);
    }
    occupiedMemory = runtime.totalMemory() - runtime.freeMemory();
    if (gc) {
        logger.log(Level.INFO, " Memory In Use  (Kb): {0}", occupiedMemory / KB);
    }
}

---

From source file:weka.server.RootServlet.java

/**
 * Process a HTTP GET/*from  w  ww  .  j  av a  2  s. c  o m*/
 * 
 * @param request the request
 * @param response the response
 * 
 * @throws ServletException
 * @throws IOException
 */
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {
    // TODO

    if (!request.getRequestURI().equals(CONTEXT_PATH)) {
        return;
    }

    response.setContentType("text/html;charset=UTF-8");
    response.setStatus(HttpServletResponse.SC_OK);

    PrintWriter out = response.getWriter();

    try {
        out.println("<HTML>\n<HEAD>\n<TITLE>Weka server</TITLE>");
        out.println("<META http-equiv=\"Refresh\" content=\"30;url=" + CONTEXT_PATH + "\">");
        out.println("</HEAD>\n<BODY>");
        out.println("<H2> Weka Server (" + m_server.getHostname() + ":" + m_server.getPort() + ")</H2>");
        if (m_server.getMaster() != null) {
            out.println("Registered with master server: " + m_server.getMaster() + "<br>");
        }
        out.println("Number of execution slots: " + m_server.getNumExecutionSlots() + "<br>");
        out.println("Number of tasks executing: " + m_server.numRunningTasks() + "<br>");
        out.println("Number of tasks queued: " + m_server.numQueuedTasks() + "<br>");
        out.println("Load adjust factor: " + String.format("%.3f", m_server.getLoadAdjust()) + "<br>");
        out.println("Server load ((#executing + #queued) * loadFactor / #execution_slots): "
                + m_server.getServerLoad() + "<p>");
        System.gc();
        Runtime run = Runtime.getRuntime();
        long freeM = run.freeMemory();
        long totalM = run.totalMemory();
        long maxM = run.maxMemory();
        out.println("Memory (free/total/max) in bytes: " + String.format("%,d", freeM) + " / "
                + String.format("%,d", totalM) + " / " + String.format("%,d", maxM) + "<p>");

        if (m_server.getSlaves().size() > 0) {
            out.println("<H3>Slaves</H3>");
            out.println("<p>");

            out.println("<table border=\"1\">");
            out.print("<tr><th>");
            out.print("Host</th><th>Port</th><th>Status</th><th>Load</th></tr>\n");
            Set<String> slaves = m_server.getSlaves();
            for (String slave : slaves) {
                String[] parts = slave.split(":");
                out.print("<tr>");
                out.print("<td><a href=\"http://" + parts[0] + ":" + parts[1] + "\">" + parts[0]
                        + "</a></td><td>" + parts[1] + "</td>");
                double load = getSlaveLoad(m_server, slave);
                String okString = (load < 0) ? "connection error" : "OK";

                out.print("<td>" + okString + "</td><td>" + load + "</td></tr>\n");
            }
            out.print("</table><p>");
        }

        out.println("<p>");

        out.println("<H3>Tasks</H3>");

        out.println("<table border=\"1\">");
        out.print("<tr><th>");
        out.print("Task name</th><th>ID</th><th>Server</th><th>Last execution</th><th>Next execution</th>"
                + "<th>Status</th><th>Purge</th></tr>\n");
        List<WekaTaskMap.WekaTaskEntry> taskList = m_taskMap.getTaskList();
        for (WekaTaskMap.WekaTaskEntry entry : taskList) {
            String name = entry.getName();
            String id = entry.getID();
            NamedTask task = m_taskMap.getTask(entry);
            TaskStatusInfo tsi = task.getTaskStatus();
            // Date lastExecuted = m_taskMap.getExecutionTime(entry);
            Date lastExecuted = entry.getLastExecution();
            Date nextExecution = null;
            if (task instanceof Scheduled) {
                nextExecution = ((Scheduled) task).getSchedule().nextExecution(lastExecuted);
            }

            out.print("<tr>");
            out.print("<td><a href=\"" + GetTaskStatusServlet.CONTEXT_PATH + "?name="
                    + URLEncoder.encode(entry.toString(), "UTF-8") + "\">" + name + "</a></td>");
            out.print("<td>" + id + "</td>");
            String server = entry.getServer();
            if (server.equals(m_server.getHostname() + ":" + m_server.getPort())) {
                server = "local";
            }
            out.print("<td>");
            if (!server.equals("local")) {
                out.print("<a href=\"http://" + server + "\">" + server + "</a></td>");
            } else {
                out.print("" + server + "</td>");
            }

            String formattedLastDate = " - ";
            String formattedNextDate = " - ";
            SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss");
            if (lastExecuted != null) {
                formattedLastDate = sdf.format(lastExecuted);
            }
            out.print("<td>" + formattedLastDate + "</td>");

            if (nextExecution != null) {
                formattedNextDate = sdf.format(nextExecution);
            }
            out.print("<td>" + formattedNextDate + "</td>");

            out.print("<td>" + GetTaskStatusServlet.taskStatusInfoToString(tsi) + "</td>");

            if (tsi.getExecutionStatus() != TaskStatusInfo.PROCESSING) {
                out.print("<td><a href=\"" + PurgeTaskServlet.CONTEXT_PATH + "?name="
                        + URLEncoder.encode(entry.toString(), "UTF-8") + "\">Remove</a></td>");
            } else {
                out.print("<td> -- </td>");
            }
            out.print("</tr>\n");
        }
        out.print("</table><p>");

        out.println("</BODY>\n</HTML>");
    } catch (Exception ex) {
        ex.printStackTrace();
    } finally {
        if (out != null) {
            out.flush();
            out.close();
            out = null;
        }
    }
}

---

From source file:org.openflamingo.engine.util.VersionConfigurer.java

/**
 * Notification that the web application initialization
 * process is starting.//from   w w w  .  j  a v a2 s . c  o  m
 * All ServletContextListeners are notified of context
 * initialization before any filter or servlet in the web
 * application is initialized.
 *
 * @param servletContextEvent {@link javax.servlet.ServletContextEvent}
 */
@Override
public void contextInitialized(ServletContextEvent servletContextEvent) {
    Log4jWebConfigurer.initLogging(servletContextEvent.getServletContext());

    Properties properties = new Properties();
    ServletContext context = servletContextEvent.getServletContext();
    InputStream inputStream = null;
    try {
        inputStream = context.getResourceAsStream("/WEB-INF/version.properties");
        properties.load(inputStream);
    } catch (Exception ex) {
        throw new IllegalArgumentException("Cannot load a '/WEB/INF/version.properties' file.", ex);
    } finally {
        IOUtils.closeQuietly(inputStream);
    }

    StringBuilder builder = new StringBuilder();

    printHeader(builder, "Application Information");
    Properties appProps = new Properties();
    appProps.put("Application", "Flamingo Workflow Engine");
    appProps.put("Version", properties.get("version"));
    appProps.put("Build Date", properties.get("build.timestamp"));
    appProps.put("Build Number", properties.get("build.number"));
    appProps.put("Revision Number", properties.get("revision.number"));
    appProps.put("Build Key", properties.get("build.key"));

    if (context != null) {
        appProps.put("Application Server", context.getServerInfo() + " - Servlet API "
                + context.getMajorVersion() + "." + context.getMinorVersion());
    }

    Properties systemProperties = System.getProperties();
    appProps.put("Java Version", systemProperties.getProperty("java.version", UNKNOWN) + " - "
            + systemProperties.getProperty("java.vendor", UNKNOWN));
    appProps.put("Current Working Directory", systemProperties.getProperty("user.dir", UNKNOWN));

    print(builder, appProps);

    printHeader(builder, "JVM Heap Information");

    Properties memPros = new Properties();
    final Runtime rt = Runtime.getRuntime();
    final long maxMemory = rt.maxMemory() / MEGA_BYTES;
    final long totalMemory = rt.totalMemory() / MEGA_BYTES;
    final long freeMemory = rt.freeMemory() / MEGA_BYTES;
    final long usedMemory = totalMemory - freeMemory;

    memPros.put("Maximum Allowable Memory", maxMemory + "MB");
    memPros.put("Total Memory", totalMemory + "MB");
    memPros.put("Free Memory", freeMemory + "MB");
    memPros.put("Used Memory", usedMemory + "MB");

    print(builder, memPros);

    printHeader(builder, "Java System Properties");
    Properties sysProps = new Properties();
    for (final Map.Entry<Object, Object> entry : systemProperties.entrySet()) {
        sysProps.put(entry.getKey(), entry.getValue());
    }

    print(builder, sysProps);

    printHeader(builder, "System Environments");
    Map<String, String> getenv = System.getenv();
    Properties envProps = new Properties();
    Set<String> strings = getenv.keySet();
    for (String key : strings) {
        String message = getenv.get(key);
        envProps.put(key, message);
    }

    print(builder, envProps);

    logger.info("=================================================");
    logger.info(" Flamingo Workflow Engine starting...");
    logger.info("=================================================\n{}", builder.toString());
}

---

From source file:org.wso2.carbon.mediation.statistics.monitor.EsbStatisticsConsumer.java

private void updateMemoryView(MemoryStatView view) {
    Runtime runtime = Runtime.getRuntime();

    view.setTotalMemory(runtime.totalMemory() / MEGA);
    view.setFreeMemory(runtime.freeMemory() / MEGA);
    view.setUsedMemory((runtime.totalMemory() - runtime.freeMemory()) / MEGA);
    view.setMaxMemory(runtime.maxMemory() / MEGA);
}

---

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