Example usage for java.lang Runtime maxMemory

Introduction

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

Prototype

public native long maxMemory();

Source Link

Document

Returns the maximum amount of memory that the Java virtual machine will attempt to use.

Usage

From source file:ai.susi.server.api.susi.StatusService.java

@Override
public JSONObject serviceImpl(Query post, HttpServletResponse response, Authorization rights,
        JsonObjectWithDefault permissions) throws APIException {

    post.setResponse(response, "application/javascript");

    // generate json
    Runtime runtime = Runtime.getRuntime();
    JSONObject json = new JSONObject(true);
    JSONObject system = new JSONObject(true);
    system.put("assigned_memory", runtime.maxMemory());
    system.put("used_memory", runtime.totalMemory() - runtime.freeMemory());
    system.put("available_memory", runtime.maxMemory() - runtime.totalMemory() + runtime.freeMemory());
    system.put("cores", runtime.availableProcessors());
    system.put("threads", Thread.activeCount());
    system.put("runtime", System.currentTimeMillis() - Caretaker.startupTime);
    system.put("load_system_average", OS.getSystemLoadAverage());
    system.put("load_system_cpu", OS.getSystemCpuLoad());
    system.put("load_process_cpu", OS.getProcessCpuLoad());
    system.put("server_threads", SusiServer.getServerThreads());
    system.put("server_uri", SusiServer.getServerURI());

    JSONObject index = new JSONObject(true);
    JSONObject messages = new JSONObject(true);
    JSONObject queue = new JSONObject(true);
    messages.put("queue", queue);
    JSONObject users = new JSONObject(true);
    JSONObject queries = new JSONObject(true);
    JSONObject accounts = new JSONObject(true);
    JSONObject user = new JSONObject(true);
    index.put("messages", messages);
    index.put("users", users);
    index.put("queries", queries);
    index.put("accounts", accounts);
    index.put("user", user);

    JSONObject client_info = new JSONObject(true);
    client_info.put("RemoteHost", post.getClientHost());
    client_info.put("IsLocalhost", post.isLocalhostAccess() ? "true" : "false");

    JSONObject request_header = new JSONObject(true);
    Enumeration<String> he = post.getRequest().getHeaderNames();
    while (he.hasMoreElements()) {
        String h = he.nextElement();
        request_header.put(h, post.getRequest().getHeader(h));
    }/*from w w w.  j  a  v  a 2  s .c om*/
    client_info.put("request_header", request_header);

    json.put("system", system);
    json.put("index", index);
    json.put("client_info", client_info);

    return json;
}

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

@Override
public void contextInitialized(ServletContextEvent servletContextEvent) {
    Log4jWebConfigurer.initLogging(servletContextEvent.getServletContext());

    Properties properties = new Properties();
    ServletContext context = servletContextEvent.getServletContext();
    InputStream inputStream = null;
    try {//from w ww . j a v  a2 s .com
        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);

    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 Web Services starting...");
    logger.info("=================================================\n{}", builder.toString());
}

---

From source file:com.liferay.portal.events.LogMemoryUsageAction.java

public void run(HttpServletRequest req, HttpServletResponse res) throws ActionException {

    Runtime runtime = Runtime.getRuntime();

    NumberFormat nf = NumberFormat.getInstance();

    String freeMemory = nf.format(runtime.freeMemory());
    String totalMemory = nf.format(runtime.totalMemory());
    String maxMemory = nf.format(runtime.maxMemory());

    _log.debug("Memory Usage:\t" + freeMemory + "\t" + totalMemory + "\t" + maxMemory);
}

---

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 ww.  j  a v  a  2  s. c om*/
        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.pulsar.common.stats.JvmMetrics.java

public List<Metrics> generate() {

    Metrics m = createMetrics();//from  ww  w.  j av a  2 s. c  om

    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);
}

---

From source file:com.liferay.portal.events.GarbageCollectorAction.java

public void run(HttpSession ses) throws ActionException {

    try {//www  .  j a v a  2  s .  c  o  m
        Runtime runtime = Runtime.getRuntime();

        NumberFormat nf = NumberFormat.getInstance();

        _log.debug("Before GC: " + nf.format(runtime.freeMemory()) + " free, "
                + nf.format(runtime.totalMemory()) + " total, and " + nf.format(runtime.maxMemory()) + " max");

        _log.debug("Running garbage collector");

        System.gc();

        _log.debug("After GC: " + nf.format(runtime.freeMemory()) + " free, " + nf.format(runtime.totalMemory())
                + " total, and " + nf.format(runtime.maxMemory()) + " max");
    } catch (Exception e) {
        throw new ActionException(e);
    }
}

---

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

/**
 * Notification that the web application initialization
 * process is starting.//from ww  w  .  j ava  2 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:com.ikon.servlet.admin.StatsGraphServlet.java

/**
 * Generate memory statistics/*from   w  ww.j  a v a  2s  .c  o m*/
 * http://blog.codebeach.com/2008/02/determine-available-memory-in-java.html
 */
public JFreeChart jvmMemStats() throws IOException, ServletException {
    Runtime runtime = Runtime.getRuntime();
    long max = runtime.maxMemory(); // maximum amount of memory that the JVM will attempt to use
    long available = runtime.totalMemory(); // total amount of memory in the JVM
    long free = runtime.freeMemory(); // amount of free memory in the JVM
    long used = max - available;
    long total = free + used;
    String title = "JVM memory: " + FormatUtil.formatSize(total);

    log.debug("JVM maximun memory: {}", FormatUtil.formatSize(max));
    log.debug("JVM available memory: {}", FormatUtil.formatSize(available));
    log.debug("JVM free memory: {}", FormatUtil.formatSize(free));
    log.debug("JVM used memory: {}", FormatUtil.formatSize(used));
    log.debug("JVM total memory: {}", FormatUtil.formatSize(total));

    DefaultPieDataset dataset = new DefaultPieDataset();
    dataset.setValue("Available (" + FormatUtil.formatSize(free) + ")", free * 100 / total);
    dataset.setValue("Used (" + FormatUtil.formatSize(used) + ")", used * 100 / total);

    return ChartFactory.createPieChart(title, dataset, true, false, false);
}

---

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

@Override
public synchronized Map<WorkerMonitorInfoEnum, Serializable> getMonitorInfo() {
    try {/*from ww  w .j a  v a 2s.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();
    }
}

---

From source file:org.b3log.symphony.processor.StatusProcessor.java

/**
 * Reports running status.//from w ww  . j  a v a2 s .co m
 *
 * @param context the specified context
 * @param request the specified request
 * @param response the specified response
 * @throws Exception exception
 */
@RequestProcessing(value = "/status", method = HTTPRequestMethod.GET)
public void reportStatus(final HTTPRequestContext context, final HttpServletRequest request,
        final HttpServletResponse response) throws Exception {
    final String key = Symphonys.get("keyOfSymphony");
    if (!key.equals(request.getParameter("key"))) {
        response.sendError(HttpServletResponse.SC_FORBIDDEN);

        return;
    }

    final JSONObject ret = new JSONObject();

    context.renderJSON(ret);

    ret.put(Common.ONLINE_VISITOR_CNT, optionQueryService.getOnlineVisitorCount());
    ret.put(Common.ARTICLE_CHANNEL_CNT, ArticleChannel.SESSIONS.size());
    ret.put(Common.ARTICLE_LIST_CHANNEL_CNT, ArticleListChannel.SESSIONS.size());

    final JSONObject memory = new JSONObject();
    ret.put("memory", memory);

    final int mb = 1024 * 1024;
    final Runtime runtime = Runtime.getRuntime();
    memory.put("totoal", runtime.totalMemory() / mb);
    memory.put("free", runtime.freeMemory() / mb);
    memory.put("used", (runtime.totalMemory() - runtime.freeMemory()) / mb);
    memory.put("max", runtime.maxMemory() / mb);

    LOGGER.info(ret.toString(SymphonyServletListener.JSON_PRINT_INDENT_FACTOR));
    ret.put(Keys.STATUS_CODE, true);
}

---

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