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.spigotmc.timings.TimingsExport.java

/**
 * Builds an XML report of the timings to be uploaded for parsing.
 *
 * @param sender Who to report to/*from  ww  w .j  a  v  a 2s.c o m*/
 */
static void reportTimings(CommandSender sender) {
    Map parent = createObject(
            // Get some basic system details about the server
            pair("version", Bukkit.getVersion()), pair("maxplayers", Bukkit.getMaxPlayers()),
            pair("start", TimingsManager.timingStart / 1000), pair("end", System.currentTimeMillis() / 1000),
            pair("sampletime", (System.currentTimeMillis() - TimingsManager.timingStart) / 1000));
    if (!TimingsManager.privacy) {
        appendObjectData(parent, pair("server", Bukkit.getServerName()),
                pair("motd", Bukkit.getServer().getMotd()),
                pair("online-mode", Bukkit.getServer().getOnlineMode()),
                pair("icon", Bukkit.getServer().getServerIcon().getData()));
    }

    final Runtime runtime = Runtime.getRuntime();

    parent.put("system",
            createObject(pair("timingcost", getCost()), pair("name", System.getProperty("os.name")),
                    pair("version", System.getProperty("os.version")),
                    pair("arch", System.getProperty("os.arch")), pair("totalmem", runtime.totalMemory()),
                    pair("usedmem", runtime.totalMemory() - runtime.freeMemory()),
                    pair("maxmem", runtime.maxMemory()), pair("cpu", runtime.availableProcessors()),
                    pair("runtime", (System.currentTimeMillis() / 1000) - TimingsManager.SERVER_START)));

    Set<Material> tileEntityTypeSet = Sets.newHashSet();
    Set<EntityType> entityTypeSet = Sets.newHashSet();

    int size = HISTORY.size();
    TimingHistory[] history = new TimingHistory[size + 1];
    int i = 0;
    for (TimingHistory timingHistory : HISTORY) {
        tileEntityTypeSet.addAll(timingHistory.tileEntityTypeSet);
        entityTypeSet.addAll(timingHistory.entityTypeSet);
        history[i++] = timingHistory;
    }

    history[i] = new TimingHistory(); // Current snapshot
    tileEntityTypeSet.addAll(history[i].tileEntityTypeSet);
    entityTypeSet.addAll(history[i].entityTypeSet);

    Map handlers = createObject();
    for (TimingIdentifier.TimingGroup group : TimingIdentifier.GROUP_MAP.values()) {
        for (TimingHandler id : group.handlers) {
            if (!id.timed && !id.isSpecial()) {
                continue;
            }
            handlers.put(id.id, toArray(group.id, id.name));
        }
    }

    parent.put("idmap", createObject(pair("groups", toObjectMapper(TimingIdentifier.GROUP_MAP.values(),
            new Function<TimingIdentifier.TimingGroup, JSONPair>() {
                @Override
                public JSONPair apply(TimingIdentifier.TimingGroup group) {
                    return pair(group.id, group.name);
                }
            })), pair("handlers", handlers), pair("worlds", toObjectMapper(TimingHistory.worldMap.entrySet(),
                    new Function<Map.Entry<String, Integer>, JSONPair>() {
                        @Override
                        public JSONPair apply(Map.Entry<String, Integer> input) {
                            return pair(input.getValue(), input.getKey());
                        }
                    })),
            pair("tileentity", toObjectMapper(tileEntityTypeSet, new Function<Material, JSONPair>() {
                @Override
                public JSONPair apply(Material input) {
                    return pair(input.getId(), input.name());
                }
            })), pair("entity", toObjectMapper(entityTypeSet, new Function<EntityType, JSONPair>() {
                @Override
                public JSONPair apply(EntityType input) {
                    return pair(input.getTypeId(), input.name());
                }
            }))));

    // Information about loaded plugins

    parent.put("plugins",
            toObjectMapper(Bukkit.getPluginManager().getPlugins(), new Function<Plugin, JSONPair>() {
                @Override
                public JSONPair apply(Plugin plugin) {
                    return pair(plugin.getName(), createObject(
                            pair("version", plugin.getDescription().getVersion()),
                            pair("description",
                                    String.valueOf(plugin.getDescription().getDescription()).trim()),
                            pair("website", plugin.getDescription().getWebsite()),
                            pair("authors", StringUtils.join(plugin.getDescription().getAuthors(), ", "))));
                }
            }));

    // Information on the users Config

    parent.put("config", createObject(pair("spigot", mapAsJSON(Bukkit.spigot().getSpigotConfig(), null)),
            pair("bukkit", mapAsJSON(Bukkit.spigot().getBukkitConfig(), null))));

    new TimingsExport(sender, parent, history).start();
}

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From source file:jp.terasoluna.fw.batch.util.BatchUtil.java

/**
 * Java ?????? ??????/*from  www .j  a va  2 s . c  om*/
 * @return Java ?
 */
public static String getMemoryInfo() {
    DecimalFormat f1 = new DecimalFormat("#,###KB");
    DecimalFormat f2 = new DecimalFormat("##.#");

    Runtime rt = Runtime.getRuntime();
    long free = rt.freeMemory() / 1024;
    long total = rt.totalMemory() / 1024;
    long max = rt.maxMemory() / 1024;
    long used = total - free;
    double ratio = used * 100 / (double) total;

    StringBuilder sb = new StringBuilder();

    sb.append("Java memory info : ");
    sb.append("used=");
    sb.append(f1.format(used));
    sb.append(" (");
    sb.append(f2.format(ratio));
    sb.append("%), ");
    sb.append("total=");
    sb.append(f1.format(total));
    sb.append(", ");
    sb.append("max=");
    sb.append(f1.format(max));

    return sb.toString();
}

---

From source file:com.aurel.track.admin.server.status.ServerStatusBL.java

private static void loadJavaRuntimeInfo(ServerStatusTO serverStatusTO) {
    Runtime rt = Runtime.getRuntime();
    long mbyte = 1024 * 1024;
    serverStatusTO.setJavaVersion(System.getProperty("java.version"));
    serverStatusTO.setJavaVendor(System.getProperty("java.vendor"));
    serverStatusTO.setJavaHome(System.getProperty("java.home"));
    serverStatusTO.setJavaVMVersion(System.getProperty("java.vm.version"));
    serverStatusTO.setJavaVMVendor(System.getProperty("java.vm.vendor"));
    serverStatusTO.setJavaVMName(System.getProperty("java.vm.name"));

    serverStatusTO.setJavaVMfreeMemory(rt.freeMemory() / mbyte);
    serverStatusTO.setJavaVMmaxMemory(rt.maxMemory() / mbyte);
    serverStatusTO.setJavaVMtotalMemory(rt.totalMemory() / mbyte);
    serverStatusTO//from  w w  w  . j ava2s .co  m
            .setJavaVMusedMemory(serverStatusTO.getJavaVMtotalMemory() - serverStatusTO.getJavaVMfreeMemory());
}

---

From source file:com.github.nlloyd.hornofmongo.MongoScope.java

public static Object getMemInfo(Context cx, Scriptable thisObj, Object[] args, Function funObj) {
    Scriptable memInfo = (Scriptable) MongoRuntime.call(new NewInstanceAction((MongoScope) thisObj, "Object"));

    Runtime runtime = Runtime.getRuntime();
    long freeMemory = runtime.freeMemory();
    long totalMemory = runtime.totalMemory();
    long maxMemory = runtime.maxMemory();

    ScriptableObject.putProperty(memInfo, "used", ((totalMemory - freeMemory) / 1024 / 1024));
    ScriptableObject.putProperty(memInfo, "total", (totalMemory / 1024 / 1024));
    ScriptableObject.putProperty(memInfo, "max", (maxMemory / 1024 / 1024));

    return memInfo;
}

---

From source file:pcgen.util.Logging.java

/**
 * Generate the memory report string/*from   w  ww .  j av  a 2 s  .  c  om*/
 * @return the memory report string
 */
public static String memoryReportStr() {
    Runtime rt = Runtime.getRuntime();
    NumberFormat numFmt = NumberFormat.getNumberInstance();
    StringBuilder sb = new StringBuilder("Memory: ");
    sb.append(numFmt.format(rt.totalMemory() / 1024.0));
    sb.append("Kb total, ");
    sb.append(numFmt.format(rt.freeMemory() / 1024.0));
    sb.append("Kb free, ");
    sb.append(numFmt.format(rt.maxMemory() / 1024.0));
    sb.append("Kb max.");
    return sb.toString();
}

---

From source file:com.baasbox.metrics.BaasBoxMetric.java

private static void setGauges() {
    //memory gauges
    registry.register(name(GAUGE_MEMORY_MAX_ALLOCABLE), new CachedGauge<Long>(10, TimeUnit.MINUTES) {
        @Override/*w  w  w.ja v a2  s.  com*/
        public Long loadValue() {
            Runtime rt = Runtime.getRuntime();
            long maxMemory = rt.maxMemory();
            return maxMemory;
        }
    });

    registry.register(name(GAUGE_MEMORY_CURRENT_ALLOCATE), new Gauge<Long>() {
        @Override
        public Long getValue() {
            Runtime rt = Runtime.getRuntime();
            long totalMemory = rt.totalMemory();
            return totalMemory;
        }
    });

    registry.register(name(GAUGE_MEMORY_USED), new Gauge<Long>() {
        @Override
        public Long getValue() {
            Runtime rt = Runtime.getRuntime();
            long freeMemory = rt.freeMemory();
            long totalMemory = rt.totalMemory();
            return totalMemory - freeMemory;
        }
    });
    registry.register(name(GAUGE_FILESYSTEM_DATAFILE_SPACE_LEFT),
            new CachedGauge<Long>(CACHE_TIMEOUT, TimeUnit.MINUTES) {
                @Override
                public Long loadValue() {
                    return new File(BBConfiguration.getDBDir()).getFreeSpace();
                }
            });

    registry.register(name(GAUGE_FILESYSTEM_BACKUPDIR_SPACE_LEFT),
            new CachedGauge<Long>(CACHE_TIMEOUT, TimeUnit.MINUTES) {
                @Override
                public Long loadValue() {
                    return new File(BBConfiguration.getDBBackupDir()).getFreeSpace();
                }
            });

    registry.register(name(GAUGE_DB_DATA_SIZE), new CachedGauge<Long>(CACHE_TIMEOUT, TimeUnit.MINUTES) {
        @Override
        public Long loadValue() {
            boolean opened = false;
            try {
                if (DbHelper.getConnection() == null || DbHelper.getConnection().isClosed()) {
                    DbHelper.open(BBConfiguration.getAPPCODE(), BBConfiguration.getBaasBoxAdminUsername(),
                            BBConfiguration.getBaasBoxAdminUsername());
                    opened = true;
                }
                return DbHelper.getConnection().getSize();
            } catch (InvalidAppCodeException e) {
                throw new RuntimeException(e);
            } finally {
                if (opened)
                    DbHelper.close(DbHelper.getConnection());
            }
        }
    });

    registry.register(name(GAUGE_DB_DATA_DIRECTORY_SIZE),
            new CachedGauge<Long>(CACHE_TIMEOUT, TimeUnit.MINUTES) {
                @Override
                public Long loadValue() {
                    return FileUtils.sizeOfDirectory(new File(BBConfiguration.getDBDir()));
                }
            });
    registry.register(name(GAUGE_DB_MAX_SIZE_THRESHOLD),
            new CachedGauge<BigInteger>(CACHE_TIMEOUT, TimeUnit.MINUTES) {
                @Override
                public BigInteger loadValue() {
                    return BBConfiguration.getDBSizeThreshold();
                }
            });

}

---

From source file:com.toughra.mlearnplayer.EXEStrMgr.java

/**
 * This is used to log error messages//w  w w .ja v  a 2s .  co m
 */
public static void lg(int errCode, String msg, Exception e) {
    if (e != null) {
        System.err.println(msg);
        e.printStackTrace();
        msg += "Exception: " + e.toString();
    }

    if (errCode > ERROR_LOG_THRESHOLD) {
        getInstance().l('D', errCode + ":" + msg, null, 0, 0, 0, 0, 0, null, 0, 0, null, null);
    }

    if (ERROR_LOG_THRESHOLD == 0) {
        //desperate debugging mode
        Runtime rt = Runtime.getRuntime();
        String memMsg = "Total Memory : " + rt.totalMemory() + " Free Memory " + rt.freeMemory();
        getInstance().l('D', memMsg, null, 0, 0, 0, 0, 0, null, 0, 0, null, null);

        try {
            getInstance().logOut.flush();
        } catch (IOException e2) {
            System.err.println("exception flushing log output");
        }
    }
}

---

From source file:org.lnicholls.galleon.gui.Galleon.java

private static void printSystemProperties() {
    Properties properties = System.getProperties();
    Enumeration Enumeration = properties.propertyNames();
    for (Enumeration e = properties.propertyNames(); e.hasMoreElements();) {
        String propertyName = (String) e.nextElement();
        log.info(propertyName + "=" + System.getProperty(propertyName));
    }//from   ww  w . j av  a 2  s. c  o m
    Runtime runtime = Runtime.getRuntime();
    log.info("Max Memory: " + runtime.maxMemory());
    log.info("Total Memory: " + runtime.totalMemory());
    log.info("Free Memory: " + runtime.freeMemory());
}

---

From source file:edu.stanford.epadd.launcher.Splash.java

public static String getMemoryStats() {
    Runtime r = Runtime.getRuntime();
    System.gc();/*from w ww. j a  va  2 s  .  c om*/
    return r.freeMemory() / MB + " MB free, " + (r.totalMemory() / MB - r.freeMemory() / MB) + " MB used, "
            + r.maxMemory() / MB + " MB max, " + r.totalMemory() / MB + " MB total";
}

---

From source file:com.github.fedorchuck.webstore.web.controllers.SystemInfoController.java

@RequestMapping(value = "", method = GET)
public ModelAndView index() {
    ModelAndView model = new ModelAndView("sysinfo");

    final double mb = 1024 * 1024;
    Runtime runtime = Runtime.getRuntime();
    long usedRam = runtime.totalMemory() - runtime.freeMemory();

    Map<String, Double> mem = new TreeMap<>();
    mem.put("Used memory", usedRam / mb);
    mem.put("Total memory", runtime.totalMemory() / mb);
    mem.put("Free memory", runtime.freeMemory() / mb);

    model.getModel().put("mem", mem);

    //model.addObject("userActions", new UserActions());

    return model;
}

---

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