Package org.apache.iotdb.commons.utils

Class JVMCommonUtils

  • public class JVMCommonUtils
extends java.lang.Object

    • Field Summary

      Fields 
      Modifier and Type Field Description
      static int MAX_EXECUTOR_POOL_SIZE
      Default executor pool maximum size.

    • Constructor Summary

      Constructors 
      Constructor Description
      JVMCommonUtils()  

    • Method Summary

      All Methods Static Methods Concrete Methods 
      Modifier and Type Method Description
      static int getCpuCores()  
      static double getDiskFreeRatio​(java.lang.String dir)  
      static int getJdkVersion()
      get JDK version.
      static int getMaxExecutorPoolSize()  
      static long getOccupiedSpace​(java.lang.String folderPath)  
      static long getUsableSpace​(java.lang.String dir)
      NOTICE: This method is currently used only for data dir, thus using FSFactory to get file
      static boolean hasSpace​(java.lang.String dir)  

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

    • Field Detail

      • MAX_EXECUTOR_POOL_SIZE

        public static final int MAX_EXECUTOR_POOL_SIZE
        Default executor pool maximum size.

    • Constructor Detail

      • JVMCommonUtils

        public JVMCommonUtils()

    • Method Detail

      • getJdkVersion

        public static int getJdkVersion()
        get JDK version.
        Returns:
        JDK version (int type)

      • getUsableSpace

        public static long getUsableSpace​(java.lang.String dir)
        NOTICE: This method is currently used only for data dir, thus using FSFactory to get file
        Parameters:
        dir - directory path
        Returns:

      • getDiskFreeRatio

        public static double getDiskFreeRatio​(java.lang.String dir)

      • hasSpace

        public static boolean hasSpace​(java.lang.String dir)

      • getOccupiedSpace

        public static long getOccupiedSpace​(java.lang.String folderPath)
                             throws java.io.IOException
        Throws:
        java.io.IOException

      • getCpuCores

        public static int getCpuCores()

      • getMaxExecutorPoolSize

        public static int getMaxExecutorPoolSize()