SystemManager

java.lang.Object

com.decs.application.services.SystemManager

@Service public class SystemManager extends Object

System Manager Class

This class handles tasks related with the system's execution environment (Java Virtual Machine)

Version:: 1.0
Author:: Bruno Guiomar

Field Summary

Fields

Modifier and Type

Field

Description

private MemoryMXBean

memoryMXBean
Constructor Summary

Constructors

Constructor

Description

SystemManager()

Class Constructor
Method Summary

Modifier and Type

Method

Description

static long

bytes2gigaBytes(long value)

Converts a value expressed in Bytes to GigaBytes

static long

bytes2megaBytes(long value)

Converts a value expressed in Bytes to MegaBytes

static long

computeMemoryUsage(long initial, long finish)

Computes the amount of used memory between two readings

long

getHeapMemoryUsed()

long

getNonHeapMemoryUsed()

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details
- memoryMXBean
  
  private MemoryMXBean memoryMXBean
Constructor Details
- SystemManager
  
  public SystemManager()
  
  Class Constructor
Method Details
- computeMemoryUsage
  
  public static long computeMemoryUsage(long initial, long finish)
  
  Computes the amount of used memory between two readings
  
  Parameters:
  
  initial - Initial memory usage value
  
  finish - Final memory usage value
  
  Returns:
  
  Difference between the final and initial vaues
- getHeapMemoryUsed
  
  public long getHeapMemoryUsed()
  
  Returns:
  
  Amount of committed heap memory in bytes
- getNonHeapMemoryUsed
  
  public long getNonHeapMemoryUsed()
  
  Returns:
  
  Amount of committed non-heap memory in bytes
- bytes2megaBytes
  
  public static long bytes2megaBytes(long value)
  
  Converts a value expressed in Bytes to MegaBytes
  
  Parameters:
  
  value - Value in Bytes
  
  Returns:
  
  Value in MegaBytes
- bytes2gigaBytes
  
  public static long bytes2gigaBytes(long value)
  
  Converts a value expressed in Bytes to GigaBytes
  
  Parameters:
  
  value - Value in Bytes
  
  Returns:
  
  Value in GigaBytes