View Source inets (inets v9.2)

The Inets services API.

This module provides the most basic API to the clients and servers that are part of the Inets application, such as start and stop.

Data types

Type definitions that are used more than once in this module:

service() = httpc | httpd

property() = atom()

See also

httpc, httpd

Summary

Functions

Returns a list of available service names.

Returns a list of currently running services.

Returns a list of currently running services where each service is described by an [{Option, Value}] list. The information in the list is specific for each service and each service has probably its own info function that gives more details about the service. If specific service info returns {error, Reason}, Info will contain Reason term.

Equivalent to start/1.

Starts the Inets application. Default type is temporary. See also application.

Dynamically starts an Inets service after the Inets application has been started.

Stops the Inets application. See also application.

Stops a started service of the Inets application or takes down a stand_alone-service gracefully. When option stand_alone is used in start, only the pid is a valid argument to stop.

Types

Link to this type

inets_service()

View Source (not exported)
-type inets_service() :: httpd | httpc.
Link to this type

service_info()

View Source (not exported)
-type service_info() ::
          {inets_service(), pid(), [{profile, atom()}] | no_such_service | service_not_available}.

Functions

-spec service_names() -> [inets_service()].

Returns a list of available service names.

-spec services() -> [{inets_service(), pid()}] | {error, inets_not_started}.

Returns a list of currently running services.

Note

Services started as stand_alone are not listed.

-spec services_info() -> [service_info()] | {error, inets_not_started}.

Returns a list of currently running services where each service is described by an [{Option, Value}] list. The information in the list is specific for each service and each service has probably its own info function that gives more details about the service. If specific service info returns {error, Reason}, Info will contain Reason term.

-spec start() -> ok | {error, Reason} when Reason :: term().

Equivalent to start/1.

-spec start(Type) -> ok | {error, Reason} when Type :: application:restart_type(), Reason :: term().

Starts the Inets application. Default type is temporary. See also application.

Link to this function

start(Service, ServiceConfig)

View Source
-spec start(Service, ServiceConfig) -> Result
               when
                   Service :: inets_service(),
                   ServiceConfig :: ConfPropList | ConfFile,
                   ConfPropList :: [{Property, Value}],
                   ConfFile :: string(),
                   Property :: term(),
                   Value :: term(),
                   Result :: {ok, pid()} | {error, term()}.

Equivalent to start/3.

Link to this function

start(Service, ServiceConfig, How)

View Source
-spec start(Service, ServiceConfig, How) -> Result
               when
                   Service :: inets_service(),
                   ServiceConfig :: ConfPropList | ConfFile,
                   How :: inets | stand_alone,
                   ConfPropList :: [{Property, Value}],
                   ConfFile :: string(),
                   Property :: term(),
                   Value :: term(),
                   Result :: {ok, pid()} | {error, term()}.

Dynamically starts an Inets service after the Inets application has been started.

Note

Dynamically started services are not handled by application takeover and failover behavior when Inets is run as a distributed application. Nor are they automatically restarted when the Inets application is restarted. As long as the Inets application is operational, they are supervised and can be soft code upgraded.

A service started as stand_alone, that is, the service is not started as part of the Inets application, lose all OTP application benefits, such as soft upgrade. The stand_alone-service is linked to the process that started it. Usually some supervision functionality is still in place and in some sense the calling process becomes the top supervisor.

Warning

The stand_alone option is considered deprecated.

-spec stop() -> ok.

Stops the Inets application. See also application.

Link to this function

stop(Service, Reference)

View Source
-spec stop(Service, Reference) -> ok | {error, Reason}
              when
                  Service :: inets_service() | stand_alone,
                  Reference :: pid() | term(),
                  Reason :: term().

Stops a started service of the Inets application or takes down a stand_alone-service gracefully. When option stand_alone is used in start, only the pid is a valid argument to stop.