io.parallec.core.bean.ping

Enum PingMode

java.lang.Object

java.lang.Enum<PingMode>

io.parallec.core.bean.ping.PingMode

All Implemented Interfaces:

java.io.Serializable, java.lang.Comparable<PingMode>

public enum PingMode
extends java.lang.Enum<PingMode>

The Enum of Ping Mode. Process or INET_ADDRESS_REACHABLE based. Default as InetAddress mode. InetAddress requires Root privilege.

Author:

Yuanteng (Jeff) Pei

Enum Constant Summary

Enum Constants

Enum Constant and Description
INET_ADDRESS_REACHABLE_NEED_ROOT The inet address reachable.
PROCESS Start a process to run the real ping command from the OS current did not specify the timeout.

Method Summary

Modifier and Type	Method and Description
static PingMode	valueOf(java.lang.String name) Returns the enum constant of this type with the specified name.
static PingMode[]	values() Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

PROCESS

public static final PingMode PROCESS

Start a process to run the real ping command from the OS current did not specify the timeout. This is slower due to creating process for each request that limits the concurrency. Suggest maximum concurrency less than 400. if not adjust your ulimit. Only use this when you do not run as Root.

INET_ADDRESS_REACHABLE_NEED_ROOT

public static final PingMode INET_ADDRESS_REACHABLE_NEED_ROOT

The inet address reachable. please only use in linux model with Root privilege. This is the way faster approach. This normally needs ROOT privilege to really use ICMP protocol. Test whether that address is reachable. Best effort is made by the implementation to try to reach the host, but firewalls and server configuration may block requests resulting in a unreachable status while some specific ports may be accessible. A typical implementation will use ICMP ECHO REQUESTs if the privilege can be obtained, otherwise it will try to establish a TCP connection on port 7 (Echo) of the destination host.

Method Detail

values

public static PingMode[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (PingMode c : PingMode.values())
    System.out.println(c);

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static PingMode valueOf(java.lang.String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

java.lang.IllegalArgumentException - if this enum type has no constant with the specified name

java.lang.NullPointerException - if the argument is null