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-rw-r--r--lib/kernel/doc/src/application.xml109
1 files changed, 72 insertions, 37 deletions
diff --git a/lib/kernel/doc/src/application.xml b/lib/kernel/doc/src/application.xml
index 38c7b5acf1..5170502581 100644
--- a/lib/kernel/doc/src/application.xml
+++ b/lib/kernel/doc/src/application.xml
@@ -28,7 +28,7 @@
<date></date>
<rev></rev>
</header>
- <module>application</module>
+ <module since="">application</module>
<modulesummary>Generic OTP application functions</modulesummary>
<description>
<p>In OTP, <em>application</em> denotes a component implementing
@@ -67,8 +67,8 @@
</datatypes>
<funcs>
<func>
- <name name="ensure_all_started" arity="1"/>
- <name name="ensure_all_started" arity="2"/>
+ <name name="ensure_all_started" arity="1" since="OTP R16B02"/>
+ <name name="ensure_all_started" arity="2" since="OTP R16B02"/>
<fsummary>Load and start an application and its dependencies, recursively.</fsummary>
<desc>
<p>Equivalent to calling
@@ -85,8 +85,8 @@
</desc>
</func>
<func>
- <name name="ensure_started" arity="1"/>
- <name name="ensure_started" arity="2"/>
+ <name name="ensure_started" arity="1" since="OTP R16B01"/>
+ <name name="ensure_started" arity="2" since="OTP R16B01"/>
<fsummary>Load and start an application.</fsummary>
<desc>
<p>Equivalent to
@@ -95,8 +95,8 @@
</desc>
</func>
<func>
- <name name="get_all_env" arity="0"/>
- <name name="get_all_env" arity="1"/>
+ <name name="get_all_env" arity="0" since=""/>
+ <name name="get_all_env" arity="1" since=""/>
<fsummary>Get the configuration parameters for an application.</fsummary>
<desc>
<p>Returns the configuration parameters and their values for
@@ -108,8 +108,8 @@
</desc>
</func>
<func>
- <name name="get_all_key" arity="0"/>
- <name name="get_all_key" arity="1"/>
+ <name name="get_all_key" arity="0" since=""/>
+ <name name="get_all_key" arity="1" since=""/>
<fsummary>Get the application specification keys.</fsummary>
<desc>
<p>Returns the application specification keys and their values
@@ -122,8 +122,8 @@
</desc>
</func>
<func>
- <name name="get_application" arity="0"/>
- <name name="get_application" arity="1"/>
+ <name name="get_application" arity="0" since=""/>
+ <name name="get_application" arity="1" since=""/>
<fsummary>Get the name of an application containing a certain process or module.</fsummary>
<desc>
<p>Returns the name of the application to which the process
@@ -136,8 +136,8 @@
</desc>
</func>
<func>
- <name name="get_env" arity="1"/>
- <name name="get_env" arity="2"/>
+ <name name="get_env" arity="1" since=""/>
+ <name name="get_env" arity="2" since=""/>
<fsummary>Get the value of a configuration parameter.</fsummary>
<desc>
<p>Returns the value of configuration parameter <c><anno>Par</anno></c>
@@ -153,7 +153,7 @@
</desc>
</func>
<func>
- <name name="get_env" arity="3"/>
+ <name name="get_env" arity="3" since="OTP R16B"/>
<fsummary>Get the value of a configuration parameter using a default.</fsummary>
<desc>
<p>Works like <seealso marker="#get_env/2"><c>get_env/2</c></seealso> but returns
@@ -162,8 +162,8 @@
</desc>
</func>
<func>
- <name name="get_key" arity="1"/>
- <name name="get_key" arity="2"/>
+ <name name="get_key" arity="1" since=""/>
+ <name name="get_key" arity="2" since=""/>
<fsummary>Get the value of an application specification key.</fsummary>
<desc>
<p>Returns the value of the application specification key
@@ -180,8 +180,8 @@
</desc>
</func>
<func>
- <name name="load" arity="1"/>
- <name name="load" arity="2"/>
+ <name name="load" arity="1" since=""/>
+ <name name="load" arity="2" since=""/>
<fsummary>Load an application.</fsummary>
<type name="application_spec"/>
<type name="application_opt"/>
@@ -226,7 +226,7 @@ Nodes = [cp1@cave, {cp2@cave, cp3@cave}]</code>
</desc>
</func>
<func>
- <name name="loaded_applications" arity="0"/>
+ <name name="loaded_applications" arity="0" since=""/>
<fsummary>Get the currently loaded applications.</fsummary>
<desc>
<p>Returns a list with information about the applications, and included
@@ -238,7 +238,42 @@ Nodes = [cp1@cave, {cp2@cave, cp3@cave}]</code>
</desc>
</func>
<func>
- <name name="permit" arity="2"/>
+ <name name="set_env" arity="1" since="OTP @OTP-15642@"/>
+ <name name="set_env" arity="2" since="OTP @OTP-15642@"/>
+ <fsummary>Sets the configuration parameters of multiple applications.</fsummary>
+ <desc>
+ <p>Sets the configuration <c><anno>Config</anno></c> for multiple
+ applications. It is equivalent to calling <c>set_env/4</c> on
+ each application individially, except it is more efficient.
+ The given <c><anno>Config</anno></c> is validated before the
+ configuration is set.</p>
+ <p><c>set_env/2</c> uses the standard <c>gen_server</c> time-out
+ value (5000 ms). Option <c>timeout</c> can be specified
+ if another time-out value is useful, for example, in situations
+ where the application controller is heavily loaded.</p>
+ <p>Option <c>persistent</c> can be set to <c>true</c>
+ to guarantee that parameters set with <c>set_env/2</c>
+ are not overridden by those defined in the application resource
+ file on load. This means that persistent values will stick after the application
+ is loaded and also on application reload.</p>
+ <p>If an application is given more than once or if an application
+ has the same key given more than once, the behaviour is undefined
+ and a warning message will be logged. In future releases, an error
+ will be raised.</p>
+ <p><c>set_env/1</c> is equivalent to <c>set_env(Config, [])</c>.</p>
+ <warning>
+ <p>Use this function only if you know what you are doing,
+ that is, on your own applications. It is very
+ application-dependent and
+ configuration parameter-dependent when and how often
+ the value is read by the application. Careless use
+ of this function can put the application in a
+ weird, inconsistent, and malfunctioning state.</p>
+ </warning>
+ </desc>
+ </func>
+ <func>
+ <name name="permit" arity="2" since=""/>
<fsummary>Change the permission for an application to run at a node.</fsummary>
<desc>
<p>Changes the permission for <c><anno>Application</anno></c> to run at
@@ -271,8 +306,8 @@ Nodes = [cp1@cave, {cp2@cave, cp3@cave}]</code>
</desc>
</func>
<func>
- <name name="set_env" arity="3"/>
- <name name="set_env" arity="4"/>
+ <name name="set_env" arity="3" since=""/>
+ <name name="set_env" arity="4" since=""/>
<fsummary>Set the value of a configuration parameter.</fsummary>
<desc>
<p>Sets the value of configuration parameter <c><anno>Par</anno></c> for
@@ -302,8 +337,8 @@ Nodes = [cp1@cave, {cp2@cave, cp3@cave}]</code>
</desc>
</func>
<func>
- <name name="start" arity="1"/>
- <name name="start" arity="2"/>
+ <name name="start" arity="1" since=""/>
+ <name name="start" arity="2" since=""/>
<fsummary>Load and start an application.</fsummary>
<desc>
<p>Starts <c><anno>Application</anno></c>. If it is not loaded,
@@ -353,7 +388,7 @@ Nodes = [cp1@cave, {cp2@cave, cp3@cave}]</code>
</desc>
</func>
<func>
- <name name="start_type" arity="0"/>
+ <name name="start_type" arity="0" since=""/>
<fsummary>Get the start type of an ongoing application startup.</fsummary>
<desc>
<p>This function is intended to be called by a process belonging
@@ -370,7 +405,7 @@ Nodes = [cp1@cave, {cp2@cave, cp3@cave}]</code>
</desc>
</func>
<func>
- <name name="stop" arity="1"/>
+ <name name="stop" arity="1" since=""/>
<fsummary>Stop an application.</fsummary>
<desc>
<p>Stops <c><anno>Application</anno></c>. The application master calls
@@ -399,7 +434,7 @@ Nodes = [cp1@cave, {cp2@cave, cp3@cave}]</code>
</desc>
</func>
<func>
- <name name="takeover" arity="2"/>
+ <name name="takeover" arity="2" since=""/>
<fsummary>Take over a distributed application.</fsummary>
<desc>
<p>Takes over the distributed application
@@ -424,7 +459,7 @@ Nodes = [cp1@cave, {cp2@cave, cp3@cave}]</code>
</desc>
</func>
<func>
- <name name="unload" arity="1"/>
+ <name name="unload" arity="1" since=""/>
<fsummary>Unload an application.</fsummary>
<desc>
<p>Unloads the application specification for <c><anno>Application</anno></c>
@@ -435,8 +470,8 @@ Nodes = [cp1@cave, {cp2@cave, cp3@cave}]</code>
</desc>
</func>
<func>
- <name name="unset_env" arity="2"/>
- <name name="unset_env" arity="3"/>
+ <name name="unset_env" arity="2" since=""/>
+ <name name="unset_env" arity="3" since=""/>
<fsummary>Unset the value of a configuration parameter.</fsummary>
<desc>
<p>Removes the configuration parameter <c><anno>Par</anno></c> and its value
@@ -459,8 +494,8 @@ Nodes = [cp1@cave, {cp2@cave, cp3@cave}]</code>
</desc>
</func>
<func>
- <name name="which_applications" arity="0"/>
- <name name="which_applications" arity="1"/>
+ <name name="which_applications" arity="0" since=""/>
+ <name name="which_applications" arity="1" since=""/>
<fsummary>Get the currently running applications.</fsummary>
<desc>
<p>Returns a list with information about the applications that
@@ -484,7 +519,7 @@ Nodes = [cp1@cave, {cp2@cave, cp3@cave}]</code>
</section>
<funcs>
<func>
- <name>Module:start(StartType, StartArgs) -> {ok, Pid} | {ok, Pid, State} | {error, Reason}</name>
+ <name since="">Module:start(StartType, StartArgs) -> {ok, Pid} | {ok, Pid, State} | {error, Reason}</name>
<fsummary>Start an application.</fsummary>
<type>
<v>StartType = <seealso marker="#type-start_type"><c>start_type()</c></seealso></v>
@@ -526,7 +561,7 @@ Nodes = [cp1@cave, {cp2@cave, cp3@cave}]</code>
</desc>
</func>
<func>
- <name>Module:start_phase(Phase, StartType, PhaseArgs) -> ok | {error, Reason}</name>
+ <name since="">Module:start_phase(Phase, StartType, PhaseArgs) -> ok | {error, Reason}</name>
<fsummary>Extended start of an application.</fsummary>
<type>
<v>Phase = atom()</v>
@@ -551,7 +586,7 @@ Nodes = [cp1@cave, {cp2@cave, cp3@cave}]</code>
</desc>
</func>
<func>
- <name>Module:prep_stop(State) -> NewState</name>
+ <name since="">Module:prep_stop(State) -> NewState</name>
<fsummary>Prepare an application for termination.</fsummary>
<type>
<v>State = NewState = term()</v>
@@ -569,7 +604,7 @@ Nodes = [cp1@cave, {cp2@cave, cp3@cave}]</code>
</desc>
</func>
<func>
- <name>Module:stop(State)</name>
+ <name since="">Module:stop(State)</name>
<fsummary>Clean up after termination of an application.</fsummary>
<type>
<v>State = term()</v>
@@ -585,7 +620,7 @@ Nodes = [cp1@cave, {cp2@cave, cp3@cave}]</code>
</desc>
</func>
<func>
- <name>Module:config_change(Changed, New, Removed) -> ok</name>
+ <name since="">Module:config_change(Changed, New, Removed) -> ok</name>
<fsummary>Update the configuration parameters for an application.</fsummary>
<type>
<v>Changed = [{Par,Val}]</v>