io.ray.streaming.runtime.util

Class ResourceUtil

java.lang.Object

io.ray.streaming.runtime.util.ResourceUtil

public class ResourceUtil
extends Object

Resource Utility collects current OS and JVM resource usage information

Field Summary

Fields

Modifier and Type	Field and Description
static org.slf4j.Logger	LOG

Constructor Summary

Constructors

Constructor and Description
ResourceUtil()

Method Summary

Modifier and Type	Method and Description
static Optional<Container>	getContainerByHostname(List<Container> containers, String hostName) Get container by hostname
static Optional<Container>	getContainerById(List<Container> containers, ContainerId containerID) Get container by id
static List<Container>	getContainersByHostname(List<Container> containers, Collection<String> containerHosts) Get containers by hostname of address
static int	getCpuCores() Returns system cpu cores num
static long	getJvmHeapUsageInBytes()
static double	getJvmHeapUsageRatio()
static double	getProcessCpuUsage() Returns the cpu load for current jvm process.
static double	getSystemCpuUsage()
static double	getSystemCpuUtilByMXBean()
static double	getSystemCpuUtilByVsar() Get system cpu util by vsar
static double	getSystemLoadAverage() Returns the system load average for the last minute
static long	getSystemMemoryUsage() Returns the used system physical memory in bytes
static double	getSystemMemoryUsageRatio() Returns the ratio of used system physical memory.
static long	getSystemTotalMemory() Returns the total amount of physical memory in bytes.
static void	logProcessMemoryDetail() Log current jvm process's memory detail

Methods inherited from class java.lang.Object

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

Field Detail

LOG

public static final org.slf4j.Logger LOG

Constructor Detail

ResourceUtil

public ResourceUtil()

Method Detail

logProcessMemoryDetail

public static void logProcessMemoryDetail()

Log current jvm process's memory detail

getJvmHeapUsageRatio

public static double getJvmHeapUsageRatio()

Returns:

jvm heap usage ratio. note that one of the survivor space is not include in total memory while calculating this ratio.

getJvmHeapUsageInBytes

public static long getJvmHeapUsageInBytes()

Returns:

jvm heap usage(in bytes). note that this value doesn't include one of the survivor space.

getSystemTotalMemory

public static long getSystemTotalMemory()

Returns the total amount of physical memory in bytes.

getSystemMemoryUsage

public static long getSystemMemoryUsage()

Returns the used system physical memory in bytes

getSystemMemoryUsageRatio

public static double getSystemMemoryUsageRatio()

Returns the ratio of used system physical memory. This value is a double in the [0.0,1.0]

getProcessCpuUsage

public static double getProcessCpuUsage()

Returns the cpu load for current jvm process. This value is a double in the [0.0,1.0]

getSystemCpuUsage

public static double getSystemCpuUsage()

Returns:

the system cpu usage. This value is a double in the [0.0,1.0] We will try to use `vsar` to get cpu usage by default, and use MXBean if any exception raised.

getSystemCpuUtilByMXBean

public static double getSystemCpuUtilByMXBean()

Returns:

the "recent cpu usage" for the whole system. This value is a double in the [0.0,1.0] interval. A value of 0.0 means that all CPUs were idle during the recent period of time observed, while a value of 1.0 means that all CPUs were actively running 100% of the time during the recent period being observed

getSystemCpuUtilByVsar

public static double getSystemCpuUtilByVsar()
                                     throws Exception

Get system cpu util by vsar

Throws:

Exception

getSystemLoadAverage

public static double getSystemLoadAverage()

Returns the system load average for the last minute

getCpuCores

public static int getCpuCores()

Returns system cpu cores num

getContainersByHostname

public static List<Container> getContainersByHostname(List<Container> containers,
                                                      Collection<String> containerHosts)

Get containers by hostname of address

Parameters:

containers - container list

containerHosts - container hostname or address set

Returns:

matched containers

getContainerByHostname

public static Optional<Container> getContainerByHostname(List<Container> containers,
                                                         String hostName)

Get container by hostname

Parameters:

hostName - container hostname

Returns:

container

getContainerById

public static Optional<Container> getContainerById(List<Container> containers,
                                                   ContainerId containerID)

Get container by id

Parameters:

containerID - container id

Returns:

container