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add shared advisory locks #2

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add shared advisory locks #2

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19 changes: 14 additions & 5 deletions lib/sequel/extensions/pg_advisory_lock.rb
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Original file line number Diff line number Diff line change
Expand Up @@ -7,18 +7,27 @@ module PgAdvisoryLock

SESSION_LEVEL_LOCKS = [
:pg_advisory_lock,
:pg_try_advisory_lock
:pg_try_advisory_lock,
:pg_advisory_lock_shared,
:pg_try_advisory_lock_shared
].freeze

TRANSACTION_LEVEL_LOCKS = [
:pg_advisory_xact_lock,
:pg_try_advisory_xact_lock
:pg_try_advisory_xact_lock,
:pg_advisory_xact_lock_shared,
:pg_try_advisory_xact_lock_shared
].freeze

LOCK_FUNCTIONS = (SESSION_LEVEL_LOCKS + TRANSACTION_LEVEL_LOCKS).freeze

DEFAULT_LOCK_FUNCTION = :pg_advisory_lock
UNLOCK_FUNCTION = :pg_advisory_unlock
UNLOCK_FUNCTIONS = {
pg_advisory_lock: :pg_advisory_unlock,
pg_try_advisory_lock: :pg_advisory_unlock,
pg_advisory_lock_shared: :pg_advisory_unlock_shared,
pg_try_advisory_lock_shared: :pg_advisory_unlock_shared
}.freeze

def registered_advisory_locks
@registered_advisory_locks ||= {}
Expand Down Expand Up @@ -50,7 +59,7 @@ def with_advisory_lock(name, id = nil, &block)
begin
result = yield
ensure
get(Sequel.function(UNLOCK_FUNCTION, *function_params))
get(Sequel.function(UNLOCK_FUNCTIONS[lock_function], *function_params))
result
end
end
Expand Down Expand Up @@ -86,4 +95,4 @@ def advisory_lock_key_for(lock_name)
end

Database.register_extension(:pg_advisory_lock, Postgres::PgAdvisoryLock)
end
end
6 changes: 5 additions & 1 deletion test/register_advisory_lock_test.rb
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Original file line number Diff line number Diff line change
Expand Up @@ -8,8 +8,12 @@
[
:pg_advisory_lock,
:pg_try_advisory_lock,
:pg_advisory_lock_shared,
:pg_try_advisory_lock_shared,
:pg_advisory_xact_lock,
:pg_try_advisory_xact_lock
:pg_try_advisory_xact_lock,
:pg_advisory_xact_lock_shared,
:pg_try_advisory_xact_lock_shared
]
end

Expand Down