Java File.getUsableSpace方法代码示例

import java.io.File; //导入方法依赖的package包/类
private static File createBundleStorage(String bundleName){
    if(new File(STORAGE_LOCATION).getUsableSpace()>10*1024*1024){
        return new File(STORAGE_LOCATION,bundleName);
    }else{
        File externalStorageDir = null;
        File[] externalStorages = getExternalFilesDirs(RuntimeVariables.androidApplication,"storage");
        if(externalStorages!=null && externalStorages.length>0){
            for(File tmpDir : externalStorages){
                if(tmpDir!=null && getStorageState(tmpDir).equals(Environment.MEDIA_MOUNTED) && tmpDir.getUsableSpace()>20*1024*1024) {
                    externalStorageDir = tmpDir;
                    break;
                }
            }
        }
        if(externalStorageDir!=null){
            return new File(externalStorageDir,bundleName);
        }
    }
    return new File(STORAGE_LOCATION,bundleName);
}
 

import java.io.File; //导入方法依赖的package包/类
private static void compareZeroExist() {
    try {
        File f = File.createTempFile("tmp", null, new File("."));

        long [] s = { f.getTotalSpace(), f.getFreeSpace(), f.getUsableSpace() };

        for (int i = 0; i < s.length; i++) {
            if (s[i] == 0L)
                fail(f.getName(), s[i], "==", 0L);
            else
                pass();
        }
    } catch (IOException x) {
        fail("Couldn't create temp file for test");
    }
}
 

import java.io.File; //导入方法依赖的package包/类
private void setGoodDirsDiskUtilizationPercentage() {

    long totalSpace = 0;
    long usableSpace = 0;

    for (String dir : localDirs) {
      File f = new File(dir);
      if (!f.isDirectory()) {
        continue;
      }
      totalSpace += f.getTotalSpace();
      usableSpace += f.getUsableSpace();
    }
    if (totalSpace != 0) {
      long tmp = ((totalSpace - usableSpace) * 100) / totalSpace;
      if (Integer.MIN_VALUE < tmp && Integer.MAX_VALUE > tmp) {
        goodDirsDiskUtilizationPercentage = (int) tmp;
      }
    } else {
      // got no good dirs
      goodDirsDiskUtilizationPercentage = 0;
    }
  }
 

import java.io.File; //导入方法依赖的package包/类
/**
 * Check how much usable space is available at a given path.
 *
 * @param path The path to check
 * @return The space available in bytes
 */
@TargetApi(VERSION_CODES.GINGERBREAD)
public static long getUsableSpace(File path) {
    if (Utils.hasGingerbread()) {
        return path.getUsableSpace();
    }
    final StatFs stats = new StatFs(path.getPath());
    return stats.getBlockSizeLong() * stats.getAvailableBlocksLong();
}
 

import java.io.File; //导入方法依赖的package包/类
public static long getUsableSpace(File path) {
    if (path == null) {
        return -1;
    }
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.GINGERBREAD) {
        return path.getUsableSpace()/1024/1024;
    } else {
        if (!path.exists()) {
            return 0;
        } else {
            final StatFs stats = new StatFs(path.getPath());
            return (long) stats.getBlockSize() * (long) stats.getAvailableBlocks()/1024/1024;
        }
    }
}
 

import java.io.File; //导入方法依赖的package包/类
private static void compare(Space s) {
    File f = new File(s.name());
    long ts = f.getTotalSpace();
    long fs = f.getFreeSpace();
    long us = f.getUsableSpace();

    out.format("%s:%n", s.name());
    String fmt = "  %-4s total= %12d free = %12d usable = %12d%n";
    out.format(fmt, "df", s.total(), 0, s.free());
    out.format(fmt, "getX", ts, fs, us);

    // if the file system can dynamically change size, this check will fail
    if (ts != s.total())
        fail(s.name(), s.total(), "!=", ts);
    else
        pass();

    // unix df returns statvfs.f_bavail
    long tsp = (!name.startsWith("Windows") ? us : fs);
    if (!s.woomFree(tsp))
        fail(s.name(), s.free(), "??", tsp);
    else
        pass();

    if (fs > s.total())
        fail(s.name(), s.total(), ">", fs);
    else
        pass();

    if (us > s.total())
        fail(s.name(), s.total(), ">", us);
    else
        pass();
}
 

import java.io.File; //导入方法依赖的package包/类
/**
 * Check how much usable space is available at a given path.
 *
 * @param path The path to check
 * @return The space available in bytes
 */
@TargetApi(VERSION_CODES.GINGERBREAD)
public static long getUsableSpace(File path) {
    if (Utils.hasGingerbread()) {
        return path.getUsableSpace();
    }
    final StatFs stats = new StatFs(path.getPath());
    return (long) stats.getBlockSize() * (long) stats.getAvailableBlocks();
}
 

import java.io.File; //导入方法依赖的package包/类
private long getUsableSpace() {
    long usableSpace = 0;
    try {
        File file = new File(this.path);
        usableSpace = file.getUsableSpace();
    } catch (Exception e) {
        logger.error("E_check {}", type, e);
    }
    return usableSpace;
}
 

import java.io.File; //导入方法依赖的package包/类
/**
 * 获取FTP信息
 *
 * @return FTP信息
 * @throws FtpException FTP异常
 */
public FTPInfo getFTPInfo() throws FtpException {
    User userInfo = um.getUserByName(um.getAdminName());
    TransferRateRequest transferRateRequest = (TransferRateRequest) userInfo
            .authorize(new TransferRateRequest());
    File homeDir = Paths.get(userInfo.getHomeDirectory()).toFile();
    long totalSpace = homeDir.getTotalSpace();
    long usedSpace = totalSpace - homeDir.getUsableSpace();

    return new FTPInfo(host, port, homeDir.getAbsolutePath(),
            transferRateRequest.getMaxDownloadRate() / 1024,
            transferRateRequest.getMaxUploadRate() / 1024,
            usedSpace, totalSpace);
}
 

import java.io.File; //导入方法依赖的package包/类
/**
 * get available space
 * @author leibing
 * @createTime 2017/3/2
 * @lastModify 2017/3/2
 * @param path
 * @return
 */
@TargetApi(Build.VERSION_CODES.GINGERBREAD)
public static long getUsableSpace(File path) {
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.GINGERBREAD) {
        return path.getUsableSpace();
    }
    final StatFs stats = new StatFs(path.getPath());
    return (long) stats.getBlockSize() * (long) stats.getAvailableBlocks();
}
 

import java.io.File; //导入方法依赖的package包/类
private boolean isDiskUsageOverPercentageLimit(File dir) {
  float freePercentage =
      100 * (dir.getUsableSpace() / (float) dir.getTotalSpace());
  float usedPercentage = 100.0F - freePercentage;
  return (usedPercentage > diskUtilizationPercentageCutoff
      || usedPercentage >= 100.0F);
}
 

import java.io.File; //导入方法依赖的package包/类
/**
 * Method to return status of the firewall. 
 * Status can be retrieved over REST API.
 * 
 */
public static String getStatus() {
    String s = "";
    
    s += "Jetty Server Status = " + jettyServer.getState() + "\n";
    s += "Jetty Date = " + jettyServer.getDateField().toString() + "\n";
    s += "Jetty URI = " + jettyServer.getURI().toString() + "\n";
    s += "\n";
    s += "SCTP Associations\n";
    for (Map.Entry<String, Association> a : sctpManagement.getAssociations().entrySet()) {
        s += " Name = " + a.getKey() + "\n";
        s += " Details = " + a.getValue().toString() + "\n";
        s += " isStarted = " + a.getValue().isStarted() + "\n";
        s += " isConnected = " + a.getValue().isConnected() + "\n";
    }
    s += "\n";
    s += "SCTP Servers = " + sctpManagement.getServers().toString() + "\n";
    s += "\n";
    
    s += "OS statistics\n";
    s += " Available processors (cores): " + Runtime.getRuntime().availableProcessors() + "\n";
    s += " Free memory (bytes): " + Runtime.getRuntime().freeMemory() + "\n";
    long maxMemory = Runtime.getRuntime().maxMemory();
    s += " Maximum memory (bytes): " + (maxMemory == Long.MAX_VALUE ? "no limit" : maxMemory) + "\n";
    s += " Total memory available to JVM (bytes): " + Runtime.getRuntime().totalMemory() + "\n";
    File[] roots = File.listRoots();
    /* For each filesystem root, print some info */
    for (File root : roots) {
        s += " File system root: " + root.getAbsolutePath() + "\n";
        s += " Total space (bytes): " + root.getTotalSpace() + "\n";
        s += " Free space (bytes): " + root.getFreeSpace() + "\n";
        s += " Usable space (bytes): " + root.getUsableSpace() + "\n";
    }
    s += "\n";
    s += "Network interfaces\n";
    try {
        Enumeration<NetworkInterface> nets;
        nets = NetworkInterface.getNetworkInterfaces();
        for (NetworkInterface netint : Collections.list(nets)) {
            s += " Display name: " + netint.getDisplayName() + "\n";
            s += " Name: " + netint.getName() + "\n";
            Enumeration<InetAddress> inetAddresses = netint.getInetAddresses();
            for (InetAddress inetAddress : Collections.list(inetAddresses)) {
                s += " InetAddress: " + inetAddress + "\n";
            }
        }
    } catch (SocketException ex) {
        java.util.logging.Logger.getLogger(DiameterFirewall.class.getName()).log(Level.SEVERE, null, ex);
    }
    
    return s;
}
 

import java.io.File; //导入方法依赖的package包/类
private long getUsableSpace(File path) {
    return path.getUsableSpace();
}
 

import java.io.File; //导入方法依赖的package包/类
CachedFSUsableSpace(File fs, long interval) {
  this.fs = fs;
  this.interval = interval;
  this.value = new AtomicLong(fs.getUsableSpace());
  this.lastRefresh = new AtomicLong(System.currentTimeMillis());
}
 

import java.io.File; //导入方法依赖的package包/类
@Test
public void testGetFullDirs() throws Exception {
  Configuration conf = new YarnConfiguration();

  conf.set(CommonConfigurationKeys.FS_PERMISSIONS_UMASK_KEY, "077");
  FileContext localFs = FileContext.getLocalFSFileContext(conf);

  String localDir1 = new File(testDir, "localDir1").getPath();
  String localDir2 = new File(testDir, "localDir2").getPath();
  String logDir1 = new File(testDir, "logDir1").getPath();
  String logDir2 = new File(testDir, "logDir2").getPath();
  Path localDir1Path = new Path(localDir1);
  Path logDir1Path = new Path(logDir1);
  FsPermission dirPermissions = new FsPermission((short) 0410);
  localFs.mkdir(localDir1Path, dirPermissions, true);
  localFs.mkdir(logDir1Path, dirPermissions, true);

  conf.set(YarnConfiguration.NM_LOCAL_DIRS, localDir1 + "," + localDir2);
  conf.set(YarnConfiguration.NM_LOG_DIRS, logDir1 + "," + logDir2);
  conf.setFloat(YarnConfiguration.NM_MAX_PER_DISK_UTILIZATION_PERCENTAGE,
    0.0f);
  NodeManagerMetrics nm = NodeManagerMetrics.create();
  LocalDirsHandlerService dirSvc = new LocalDirsHandlerService(nm);
  dirSvc.init(conf);
  Assert.assertEquals(0, dirSvc.getLocalDirs().size());
  Assert.assertEquals(0, dirSvc.getLogDirs().size());
  Assert.assertEquals(1, dirSvc.getDiskFullLocalDirs().size());
  Assert.assertEquals(1, dirSvc.getDiskFullLogDirs().size());
  // check the metrics
  Assert.assertEquals(2, nm.getBadLocalDirs());
  Assert.assertEquals(2, nm.getBadLogDirs());
  Assert.assertEquals(0, nm.getGoodLocalDirsDiskUtilizationPerc());
  Assert.assertEquals(0, nm.getGoodLogDirsDiskUtilizationPerc());

  conf.setFloat(YarnConfiguration.NM_MAX_PER_DISK_UTILIZATION_PERCENTAGE,
    100.0f);
  nm = NodeManagerMetrics.create();
  dirSvc = new LocalDirsHandlerService(nm);
  dirSvc.init(conf);
  Assert.assertEquals(1, dirSvc.getLocalDirs().size());
  Assert.assertEquals(1, dirSvc.getLogDirs().size());
  Assert.assertEquals(0, dirSvc.getDiskFullLocalDirs().size());
  Assert.assertEquals(0, dirSvc.getDiskFullLogDirs().size());
  // check the metrics
  File dir = new File(localDir1);
  int utilizationPerc =
      (int) ((dir.getTotalSpace() - dir.getUsableSpace()) * 100 /
          dir.getTotalSpace());
  Assert.assertEquals(1, nm.getBadLocalDirs());
  Assert.assertEquals(1, nm.getBadLogDirs());
  Assert.assertEquals(utilizationPerc,
    nm.getGoodLocalDirsDiskUtilizationPerc());
  Assert
    .assertEquals(utilizationPerc, nm.getGoodLogDirsDiskUtilizationPerc());

  FileUtils.deleteDirectory(new File(localDir1));
  FileUtils.deleteDirectory(new File(localDir2));
  FileUtils.deleteDirectory(new File(logDir1));
  FileUtils.deleteDirectory(new File(logDir1));
  dirSvc.close();
}