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appsignal
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2.15.3
2.15.2
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retired
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2.2.4
2.2.3
2.2.2
2.2.1
2.2.0
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2.1.12
2.1.11
2.1.10
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retired
2.0.3
retired
2.0.2
retired
2.0.1
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2.0.0
retired
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2.0.0-beta.10
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2.0.0-beta.5
2.0.0-beta.4
2.0.0-beta.3
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1.13.0-beta.2
1.13.0-beta.1
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1.12.0-beta.2
1.12.0-beta.1
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1.11.5
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1.11.3
1.11.2
1.11.1
1.11.0
1.11.0-beta.1
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1.10.11
1.10.10
1.10.9
1.10.8
1.10.7
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1.10.5
1.10.4
1.10.3
1.10.2
1.10.1
1.10.0
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1.9.3
1.9.2
1.9.1
1.9.1-beta.1
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1.9.0-beta.1
1.9.0-alpha.1
1.8.2
1.8.1
1.8.1-beta.2
1.8.1-beta.1
1.8.0
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1.7.1
1.7.0
1.7.0-beta.2
1.7.0-beta.1
1.7.0-alpha.4
1.7.0-alpha.3
1.7.0-alpha.2
1.7.0-alpha.1
1.6.7
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1.6.6-beta.1
1.6.5
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1.6.1
1.6.0
1.6.0-beta.1
1.6.0-alpha.1
1.5.1
1.5.0
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1.5.0-beta.1
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1.4.9
1.4.8
1.4.7
1.4.6
1.4.5
1.4.4
1.4.3
1.4.2
1.4.1
1.4.0
1.4.0-alpha.1
1.3.6
1.3.6-beta.1
1.3.5
1.3.4
1.3.4-beta.1
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1.3.1
1.3.0
1.3.0-beta.3
1.3.0-beta.2
1.3.0-beta.1
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1.2.2
1.2.1
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1.1.1
1.1.0
1.0.4
1.0.3
1.0.2
1.0.1
1.0.0
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0.13.0
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0.12.1
0.12.0
0.11.6
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0.11.4
0.11.3
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0.11.0
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0.0.8
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0.0.6
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0.0.3
0.0.2
0.0.1
Collects error and performance data from your Elixir applications and sends it to AppSignal
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lib/appsignal/transaction/registry.ex
defmodule Appsignal.TransactionRegistry do
@moduledoc """
Internal module which keeps a registry of the transaction handles
linked to their originating process.
This is used on various places to link a calling process to its transaction.
For instance, the `Appsignal.ErrorHandler` module uses it to be able to
complete the transaction in case the originating process crashed.
The transactions are stored in an ETS table (with
`{:write_concurrency, true}`, so no bottleneck is created); and the
originating process is monitored to clean up the ETS table when the
process has finished.
"""
require Logger
alias Appsignal.{Config, Transaction}
alias Appsignal.Transaction.{ETS, Receiver}
@doc """
Register the current process as the owner of the given transaction.
"""
@spec register(Transaction.t()) :: :ok
def register(transaction) do
if Config.active?() && receiver_alive?() do
pid = self()
true = ETS.insert({pid, transaction, Receiver.monitor(pid)})
:ok
end
end
@doc """
Given a process ID, return its associated transaction.
"""
@spec lookup(pid) :: Transaction.t() | nil
def lookup(pid) do
case Config.active?() && receiver_alive?() && ETS.lookup(pid) do
[{^pid, %Transaction{} = transaction, _}] -> transaction
[{^pid, %Transaction{} = transaction}] -> transaction
[{^pid, :ignore}] -> :ignored
_ -> nil
end
end
@doc false
@spec lookup(pid, boolean) :: Transaction.t() | nil | :removed
def lookup(pid, return_removed) do
IO.warn(
"Appsignal.TransactionRegistry.lookup/2 is deprecated. Use Appsignal.TransactionRegistry.lookup/1 instead"
)
case receiver_alive?() && ETS.lookup(pid) do
[{^pid, :removed}] ->
case return_removed do
false -> nil
true -> :removed
end
[{^pid, transaction, _}] ->
transaction
[{^pid, transaction}] ->
transaction
false ->
nil
[] ->
nil
end
end
@doc """
Unregister the current process as the owner of the given transaction.
"""
@spec remove_transaction(Transaction.t()) :: :ok | {:error, :not_found} | {:error, :no_receiver}
def remove_transaction(%Transaction{} = transaction) do
if receiver_alive?() do
Receiver.demonitor(transaction)
remove(transaction)
else
{:error, :no_receiver}
end
end
defp remove(transaction) do
case pids_and_monitor_references(transaction) do
[[_pid, _reference] | _] = pids_and_refs ->
delete(pids_and_refs)
[[_pid] | _] = pids ->
delete(pids)
[] ->
{:error, :not_found}
end
end
@doc """
Ignore a process in the error handler.
"""
@spec ignore(pid()) :: :ok
def ignore(pid) do
if receiver_alive?() do
ETS.insert({pid, :ignore})
:ok
else
{:error, :no_receiver}
end
end
@doc """
Check if a progress is ignored.
"""
@deprecated "Use Appsignal.TransactionRegistry.lookup/1 instead."
@spec ignored?(pid()) :: boolean()
def ignored?(pid) do
case receiver_alive?() && ETS.lookup(pid) do
[{^pid, :ignore}] -> true
_ -> false
end
end
defp delete([[pid, _] | tail]) do
ETS.delete(pid)
delete(tail)
end
defp delete([[pid] | tail]) do
ETS.delete(pid)
delete(tail)
end
defp delete([]), do: :ok
defp receiver_alive? do
pid = Process.whereis(Receiver)
!is_nil(pid) && Process.alive?(pid)
end
def pids_and_monitor_references(transaction) do
ETS.match({:"$1", transaction, :"$2"}) ++ ETS.match({:"$1", transaction})
end
end