SystemInfo (Armeria 0.99.6 API reference)

java.lang.Object

com.linecorp.armeria.common.util.SystemInfo

public final class SystemInfo
extends Object

Provides utilities for accessing the information about the current system and process.

Method Summary

Modifier and Type	Method	Description
`static long`	`currentTimeMicros()`	Returns the number of microseconds since the epoch (00:00:00, 01-Jan-1970, GMT).
`static Inet4Address`	`defaultNonLoopbackIpV4Address()`	Returns the non-loopback `Inet4Address` whose `NetworkInterface.getIndex()` is the lowest.
`static String`	`hostname()`	Returns the local hostname.
`static boolean`	`isLinux()`	Returns `true` if the operating system is Linux.
`static int`	`javaVersion()`	Returns the major version of the current Java Virtual Machine.
`static boolean`	`jettyAlpnOptionalOrAvailable()`	Whether the environment either supports ALPN natively or includes Jetty ALPN.
`static OsType`	`osType()`	Returns the operating system for the currently running process.
`static int`	`pid()`	Returns the current process ID.

Methods inherited from class java.lang.Object

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

Method Details
- javaVersion
  
  public static int javaVersion()
  
  Returns the major version of the current Java Virtual Machine.
- hostname
  
  public static String hostname()
  
  Returns the local hostname.
- jettyAlpnOptionalOrAvailable
  
  public static boolean jettyAlpnOptionalOrAvailable()
  
  Whether the environment either supports ALPN natively or includes Jetty ALPN.
- pid
  
  public static int pid()
  
  Returns the current process ID.
  
  Throws:
  
  IllegalStateException - if failed to retrieve the current process ID.
- defaultNonLoopbackIpV4Address
  
  @Nullable public static Inet4Address defaultNonLoopbackIpV4Address()
  
  Returns the non-loopback Inet4Address whose NetworkInterface.getIndex() is the lowest.
  
  See Also:
  
  Flags.preferredIpV4Addresses()
- currentTimeMicros
  
  public static long currentTimeMicros()
  
  Returns the number of microseconds since the epoch (00:00:00, 01-Jan-1970, GMT). The precision of the returned value may vary depending on Java version. Currently, Java 9 or above is required for microsecond precision. System.currentTimeMillis() * 1000 is returned on Java 8.
- osType
  
  public static OsType osType()
  
  Returns the operating system for the currently running process.
- isLinux
  
  public static boolean isLinux()
  
  Returns true if the operating system is Linux.