Module gen_server_passage

Description
Data Types
Function Index
Function Details

gen_server wrapper module for providing tracing facility.

Behaviours: gen_server.

Description

gen_server wrapper module for providing tracing facility.

The tracing facility is based on passage.

Data Types

server_name()

server_name() = {local, atom()} | {global, term()} | {via, module(), term()}

The name of a gen_server process.

See the documentation of gen_server module for more details.

server_ref()

server_ref() = pid() | atom() | {atom(), node()} | {global, term()} | {via, module(), term()}

A reference to a gen_server process.

See the documentation of gen_server module for more details.

start_option()

start_option() = {span, passage:maybe_span()} | {trace_process_lifecycle, passage:start_span_options()} | (GenServerOptions::term())

span: The parent span that starting this process. The default value is passage_pb:current_span().
trace_process_lifecycle: If this option is specified, the started process has a span including from the start of the process to the end of it. The span can be retrieved from the running process by calling process_span/0.

GenServerOptions are options handled by the gen_server functions (e.g., gen_server:start_link/3).

start_result()

start_result() = {ok, pid()} | ignore | {error, {already_started, pid()} | term()}

The result of a process startup.

See the documentation of gen_server module for more details.

Function Index

call/2	Equivalent to `Call(Name, Request, 5000)`.
call/3	Traceable variant of gen_server:call/3.
cast/2	Traceable variant of gen_server:cast/2.
process_span/0	Returns the process scope span.
reply/2	Equivalent to `gen_server:reply / 2`.
start/3	Traceable variant of gen_server:start/3.
start/4	Traceable variant of gen_server:start/4.
start_link/3	Traceable variant of gen_server:start_link/3.
start_link/4	Traceable variant of gen_server:start_link/4.
stop/1	Equivalent to `gen_server:stop / 1`.
stop/3	Equivalent to `gen_server:stop / 3`.
with_process_span/1	Executes `Fun` within the process scope span.

Function Details

call/2

call(ServerRef::server_ref(), Request::term()) -> Reply::term()

Equivalent to Call(Name, Request, 5000).

call/3

call(ServerRef::server_ref(), Request::term(), Timeout::timeout()) -> Reply::term()

Traceable variant of gen_server:call/3.

This piggybacks the current span which retrieved by passage_pd:current_span/1 when sending Request to ServerRef. The span will be handled by gen_server_passage:handle_call/3 transparently for the gen_server implementation module.

cast/2

cast(ServerRef::server_ref(), Request::term()) -> ok

Traceable variant of gen_server:cast/2.

This piggybacks the current span which retrieved by passage_pd:current_span/1 when sending Request to ServerRef. The span will be handled by gen_server_passage:handle_cast/2 transparently for the gen_server implementation module.