ResourceUtil (ray streaming runtime 1.10.0 API)

java.lang.Object
- io.ray.streaming.runtime.util.ResourceUtil

```
public class ResourceUtil
extends Object
```
Resource Utility collects current OS and JVM resource usage information

字段概要

字段
限定符和类型字段和说明

static org.slf4j.Logger LOG

字段
限定符和类型	字段和说明
`static org.slf4j.Logger`	`LOG`

构造器概要

构造器
构造器和说明

ResourceUtil()

构造器
构造器和说明
`ResourceUtil()`

方法概要

所有方法静态方法具体方法
限定符和类型	方法和说明
`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

从类继承的方法 java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- 字段详细资料
  - LOG
```
public static final org.slf4j.Logger LOG
```
- 构造器详细资料
  - ResourceUtil
```
public ResourceUtil()
```
- 方法详细资料
  - logProcessMemoryDetail
```
public static void logProcessMemoryDetail()
```
    Log current jvm process's memory detail
  - getJvmHeapUsageRatio
```
public static double getJvmHeapUsageRatio()
```
    返回:
    
    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()
```
    返回:
    
    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()
```
    返回:
    
    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()
```
    返回:
    
    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
    
    抛出:
    
    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
    
    参数:
    
    containers - container list
    
    containerHosts - container hostname or address set
    
    返回:
    
    matched containers
  - getContainerByHostname
```
public static Optional<Container> getContainerByHostname(List<Container> containers,
                                                         String hostName)
```
    Get container by hostname
    
    参数:
    
    hostName - container hostname
    
    返回:
    
    container
  - getContainerById
```
public static Optional<Container> getContainerById(List<Container> containers,
                                                   ContainerId containerID)
```
    Get container by id
    
    参数:
    
    containerID - container id
    
    返回:
    
    container

类 ResourceUtil

字段概要

构造器概要

方法概要

从类继承的方法 java.lang.Object

字段详细资料

LOG

构造器详细资料

ResourceUtil

方法详细资料

logProcessMemoryDetail

getJvmHeapUsageRatio

getJvmHeapUsageInBytes

getSystemTotalMemory

getSystemMemoryUsage

getSystemMemoryUsageRatio

getProcessCpuUsage

getSystemCpuUsage

getSystemCpuUtilByMXBean

getSystemCpuUtilByVsar

getSystemLoadAverage

getCpuCores

getContainersByHostname

getContainerByHostname

getContainerById