Class OS

java.lang.Object
org.apache.tomcat.jni.OS

public class OS extends Object
OS
Author:
Mladen Turk
  • Field Details

    • LOG_EMERG

      public static final int LOG_EMERG
      See Also:
    • LOG_ERROR

      public static final int LOG_ERROR
      See Also:
    • LOG_NOTICE

      public static final int LOG_NOTICE
      See Also:
    • LOG_WARN

      public static final int LOG_WARN
      See Also:
    • LOG_INFO

      public static final int LOG_INFO
      See Also:
    • LOG_DEBUG

      public static final int LOG_DEBUG
      See Also:
    • IS_UNIX

      public static final boolean IS_UNIX
    • IS_NETWARE

      @Deprecated public static final boolean IS_NETWARE
      Deprecated.
      Hard-coded to false since there has not been a supported Netware platform for many years. This will be removed in Tomcat 10 onwards
      See Also:
    • IS_WIN32

      public static final boolean IS_WIN32
    • IS_WIN64

      public static final boolean IS_WIN64
    • IS_LINUX

      public static final boolean IS_LINUX
    • IS_SOLARIS

      public static final boolean IS_SOLARIS
    • IS_BSD

      public static final boolean IS_BSD
    • IS_MACOSX

      public static final boolean IS_MACOSX
  • Constructor Details

    • OS

      public OS()
  • Method Details

    • defaultEncoding

      public static String defaultEncoding(long pool)
      Get the name of the system default character set.
      Parameters:
      pool - the pool to allocate the name from, if needed
      Returns:
      the encoding
    • localeEncoding

      public static String localeEncoding(long pool)
      Get the name of the current locale character set. Defers to apr_os_default_encoding if the current locale's data can't be retrieved on this system.
      Parameters:
      pool - the pool to allocate the name from, if needed
      Returns:
      the encoding
    • random

      public static int random(byte[] buf, int len)
      Generate random bytes.
      Parameters:
      buf - Buffer to fill with random bytes
      len - Length of buffer in bytes
      Returns:
      the operation status
    • info

      public static int info(long[] inf)
      Gather system info.
       On exit the inf array will be filled with:
       inf[0]  - Total usable main memory size
       inf[1]  - Available memory size
       inf[2]  - Total page file/swap space size
       inf[3]  - Page file/swap space still available
       inf[4]  - Amount of shared memory
       inf[5]  - Memory used by buffers
       inf[6]  - Memory Load
      
       inf[7]  - Idle Time in microseconds
       inf[8]  - Kernel Time in microseconds
       inf[9]  - User Time in microseconds
      
       inf[10] - Process creation time (apr_time_t)
       inf[11] - Process Kernel Time in microseconds
       inf[12] - Process User Time in microseconds
      
       inf[13] - Current working set size.
       inf[14] - Peak working set size.
       inf[15] - Number of page faults.
       
      Parameters:
      inf - array that will be filled with system information. Array length must be at least 16.
      Returns:
      the operation status
    • expand

      public static String expand(String str)
      Expand environment variables.
      Parameters:
      str - String to expand
      Returns:
      Expanded string with replaced environment variables.
    • sysloginit

      public static void sysloginit(String domain)
      Initialize system logging.
      Parameters:
      domain - String that will be prepended to every message
    • syslog

      public static void syslog(int level, String message)
      Log message.
      Parameters:
      level - Log message severity. See LOG_XXX enums.
      message - Message to log