How to get instance of a specific running process in Elixir?
In elixir, if I invoke spawn to create a process but didn't store the process instance to a variable, how can I retrieve the instance of that PID again?
I know I can use Process.list() which will return all the processes running in the current node but is there a way to retrieve the instance of a specific PID?
elixir
asked Nov 21 '18 at 16:47
Supui LamSupui Lam
33
add a comment |
In elixir, if I invoke spawn to create a process but didn't store the process instance to a variable, how can I retrieve the instance of that PID again?
I know I can use Process.list() which will return all the processes running in the current node but is there a way to retrieve the instance of a specific PID?
elixir
asked Nov 21 '18 at 16:47
Supui LamSupui Lam
33
1
The easiest way would be to either store the PID for future use, or name the process so you can reference it by that unique name (unique within a given node. Unless you registered globally, then it is unique across the entire erlang network).
– Justin Wood
Nov 21 '18 at 16:53
so if I did not name my PID, then there is no way to retrieve it?
– Supui Lam
Nov 21 '18 at 21:04
If you know the pid integer values, you can usepid/3to get the instance. E.g.pid(0, 123, 4)
– Sheharyar
Nov 21 '18 at 21:58
add a comment |
In elixir, if I invoke spawn to create a process but didn't store the process instance to a variable, how can I retrieve the instance of that PID again?
I know I can use Process.list() which will return all the processes running in the current node but is there a way to retrieve the instance of a specific PID?
elixir
asked Nov 21 '18 at 16:47
Supui LamSupui Lam
33
In elixir, if I invoke spawn to create a process but didn't store the process instance to a variable, how can I retrieve the instance of that PID again?
I know I can use Process.list() which will return all the processes running in the current node but is there a way to retrieve the instance of a specific PID?
elixir
elixir
asked Nov 21 '18 at 16:47
Supui LamSupui Lam
33
asked Nov 21 '18 at 16:47
Supui LamSupui Lam
33
asked Nov 21 '18 at 16:47
Supui LamSupui Lam
33
asked Nov 21 '18 at 16:47
Supui LamSupui Lam
33
asked Nov 21 '18 at 16:47
Supui LamSupui Lam
33
33
1
The easiest way would be to either store the PID for future use, or name the process so you can reference it by that unique name (unique within a given node. Unless you registered globally, then it is unique across the entire erlang network).
– Justin Wood
Nov 21 '18 at 16:53
so if I did not name my PID, then there is no way to retrieve it?
– Supui Lam
Nov 21 '18 at 21:04
If you know the pid integer values, you can usepid/3to get the instance. E.g.pid(0, 123, 4)
– Sheharyar
Nov 21 '18 at 21:58
add a comment |
1
The easiest way would be to either store the PID for future use, or name the process so you can reference it by that unique name (unique within a given node. Unless you registered globally, then it is unique across the entire erlang network).
– Justin Wood
Nov 21 '18 at 16:53
so if I did not name my PID, then there is no way to retrieve it?
– Supui Lam
Nov 21 '18 at 21:04
If you know the pid integer values, you can usepid/3to get the instance. E.g.pid(0, 123, 4)
– Sheharyar
Nov 21 '18 at 21:58
1
1
The easiest way would be to either store the PID for future use, or name the process so you can reference it by that unique name (unique within a given node. Unless you registered globally, then it is unique across the entire erlang network).
– Justin Wood
Nov 21 '18 at 16:53
The easiest way would be to either store the PID for future use, or name the process so you can reference it by that unique name (unique within a given node. Unless you registered globally, then it is unique across the entire erlang network).
– Justin Wood
Nov 21 '18 at 16:53
so if I did not name my PID, then there is no way to retrieve it?
– Supui Lam
Nov 21 '18 at 21:04
so if I did not name my PID, then there is no way to retrieve it?
– Supui Lam
Nov 21 '18 at 21:04
If you know the pid integer values, you can use
pid/3 to get the instance. E.g. pid(0, 123, 4)– Sheharyar
Nov 21 '18 at 21:58
If you know the pid integer values, you can use
pid/3 to get the instance. E.g. pid(0, 123, 4)– Sheharyar
Nov 21 '18 at 21:58
add a comment |
1 Answer
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The easiest way would be set a name for the process and retrieve it using Process.whereis/1.
answered Nov 21 '18 at 16:59
Marcos TapajósMarcos Tapajós
1715
add a comment |
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The easiest way would be set a name for the process and retrieve it using Process.whereis/1.
answered Nov 21 '18 at 16:59
Marcos TapajósMarcos Tapajós
1715
add a comment |
The easiest way would be set a name for the process and retrieve it using Process.whereis/1.
answered Nov 21 '18 at 16:59
Marcos TapajósMarcos Tapajós
1715
add a comment |
The easiest way would be set a name for the process and retrieve it using Process.whereis/1.
answered Nov 21 '18 at 16:59
Marcos TapajósMarcos Tapajós
1715
The easiest way would be set a name for the process and retrieve it using Process.whereis/1.
answered Nov 21 '18 at 16:59
Marcos TapajósMarcos Tapajós
1715
answered Nov 21 '18 at 16:59
Marcos TapajósMarcos Tapajós
1715
answered Nov 21 '18 at 16:59
Marcos TapajósMarcos Tapajós
1715
answered Nov 21 '18 at 16:59
Marcos TapajósMarcos Tapajós
1715
1715
add a comment |
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The easiest way would be to either store the PID for future use, or name the process so you can reference it by that unique name (unique within a given node. Unless you registered globally, then it is unique across the entire erlang network).
– Justin Wood
Nov 21 '18 at 16:53
so if I did not name my PID, then there is no way to retrieve it?
– Supui Lam
Nov 21 '18 at 21:04
If you know the pid integer values, you can use
pid/3to get the instance. E.g.pid(0, 123, 4)– Sheharyar
Nov 21 '18 at 21:58