bquarp v0.4.6 ReactiveMiddleware.Registry View Source
Link to this section Summary
Functions
Adds a signal to the registry under the given name.
The Registry is responsible for
Gets the consistency guarantee that is in use
Gets a signal by its name.
Gets the node where the signal with the given name is hosted.
Gets the names of all available signals.
Invoked when the server is started. start_link/3
or start/3
will
block until it returns.
Removes the signal with the given name if it exists and is locally hosted.
Removes all signals hosted at the given host from the registry.
Sets the consistency guarantee to use.
Start the registry
Synchronize with the given node.
Synchronize with all connected nodes.
Link to this section Functions
add_signal(signal, name) View Source
Adds a signal to the registry under the given name.
child_spec(init_arg) View Source
The Registry is responsible for
- keeping track of signals by their names,
- holding the consistency guarantee that is in use, and
- synchronizing signals and guarantee with other registries in order to create a globally consistent view of both.
get_guarantee() View Source
Gets the consistency guarantee that is in use
get_signal(name) View Source
Gets a signal by its name.
get_signal_host(name) View Source
Gets the node where the signal with the given name is hosted.
get_signals() View Source
Gets the names of all available signals.
init(args) View Source
Invoked when the server is started. start_link/3
or start/3
will
block until it returns.
init_arg
is the argument term (second argument) passed to start_link/3
.
Returning {:ok, state}
will cause start_link/3
to return
{:ok, pid}
and the process to enter its loop.
Returning {:ok, state, timeout}
is similar to {:ok, state}
,
except that it also sets a timeout. See the "Timeouts" section
in the module documentation for more information.
Returning {:ok, state, :hibernate}
is similar to {:ok, state}
except the process is hibernated before entering the loop. See
c:handle_call/3
for more information on hibernation.
Returning {:ok, state, {:continue, continue}}
is similar to
{:ok, state}
except that immediately after entering the loop
the c:handle_continue/2
callback will be invoked with the value
continue
as first argument.
Returning :ignore
will cause start_link/3
to return :ignore
and
the process will exit normally without entering the loop or calling
c:terminate/2
. If used when part of a supervision tree the parent
supervisor will not fail to start nor immediately try to restart the
GenServer
. The remainder of the supervision tree will be started
and so the GenServer
should not be required by other processes.
It can be started later with Supervisor.restart_child/2
as the child
specification is saved in the parent supervisor. The main use cases for
this are:
- The
GenServer
is disabled by configuration but might be enabled later. - An error occurred and it will be handled by a different mechanism than the
Supervisor
. Likely this approach involves callingSupervisor.restart_child/2
after a delay to attempt a restart.
Returning {:stop, reason}
will cause start_link/3
to return
{:error, reason}
and the process to exit with reason reason
without
entering the loop or calling c:terminate/2
.
Callback implementation for GenServer.init/1
.
remove_signal(name) View Source
Removes the signal with the given name if it exists and is locally hosted.
remove_signals_of(host) View Source
Removes all signals hosted at the given host from the registry.
set_guarantee(guarantee) View Source
Sets the consistency guarantee to use.
start_link(args \\ []) View Source
Start the registry
synchronize(node_name) View Source
Synchronize with the given node.
update() View Source
Synchronize with all connected nodes.