diff options
Diffstat (limited to 'lib/kernel/doc/src/global_group.xml')
| -rw-r--r-- | lib/kernel/doc/src/global_group.xml | 157 |
1 files changed, 70 insertions, 87 deletions
diff --git a/lib/kernel/doc/src/global_group.xml b/lib/kernel/doc/src/global_group.xml index 4facf4a4aa..abf6178fc4 100644 --- a/lib/kernel/doc/src/global_group.xml +++ b/lib/kernel/doc/src/global_group.xml @@ -4,7 +4,7 @@ <erlref> <header> <copyright> - <year>1998</year><year>2009</year> + <year>1998</year><year>2011</year> <holder>Ericsson AB. All Rights Reserved.</holder> </copyright> <legalnotice> @@ -42,26 +42,7 @@ <seealso marker="kernel_app">kernel(6)</seealso>, <seealso marker="config">config(4)</seealso>:</p> <code type="none"> -{global_groups, [GroupTuple]}</code> - <p>Types:</p> - <list type="bulleted"> - <item><c>GroupTuple = {GroupName, [Node]} | {GroupName, PublishType, [Node]}</c></item> - <item><c>GroupName = atom()</c> (naming a global group)</item> - <item><c>PublishType = normal | hidden</c></item> - <item><c>Node = atom()</c> (naming a node)</item> - </list> - <p>A <c>GroupTuple</c> without <c>PublishType</c> is the same as a - <c>GroupTuple</c> with <c>PublishType == normal</c>.</p> - <p>A node started with the command line flag <c>-hidden</c>, see - <seealso marker="erts:erl">erl(1)</seealso>, is said to be a - <em>hidden</em> node. A hidden node will establish hidden - connections to nodes not part of the same global group, but - normal (visible) connections to nodes part of the same global - group.</p> - <p>A global group defined with <c>PublishType == hidden</c>, is - said to be a hidden global group. All nodes in a hidden global - group are hidden nodes, regardless if they are started with - the <c>-hidden</c> command line flag or not.</p> +{global_groups, [GroupTuple :: group_tuple()]}</code> <p>For the processes and nodes to run smoothly using the global group functionality, the following criteria must be met:</p> <list type="bulleted"> @@ -82,14 +63,44 @@ <p>In the following description, a <em>group node</em> is a node belonging to the same global group as the local node.</p> </description> + <datatypes> + <datatype> + <name name="group_tuple"/> + <desc> + <p>A <c>GroupTuple</c> without <c>PublishType</c> is the same as a + <c>GroupTuple</c> with <c>PublishType == normal</c>.</p> + </desc> + </datatype> + <datatype> + <name name="group_name"/> + </datatype> + <datatype> + <name name="publish_type"/> + <desc> + <p>A node started with the command line flag <c>-hidden</c>, see + <seealso marker="erts:erl">erl(1)</seealso>, is said to be a + <em>hidden</em> node. A hidden node will establish hidden + connections to nodes not part of the same global group, but + normal (visible) connections to nodes part of the same global + group.</p> + <p>A global group defined with <c>PublishType == hidden</c>, is + said to be a hidden global group. All nodes in a hidden global + group are hidden nodes, regardless if they are started with + the <c>-hidden</c> command line flag or not.</p> + </desc> + </datatype> + <datatype> + <name name="name"/> + <desc><p>A registered name.</p></desc> + </datatype> + <datatype> + <name name="where"/> + </datatype> + </datatypes> <funcs> <func> - <name>global_groups() -> {GroupName, GroupNames} | undefined</name> + <name name="global_groups" arity="0"/> <fsummary>Return the global group names</fsummary> - <type> - <v>GroupName = atom()</v> - <v>GroupNames = [GroupName]</v> - </type> <desc> <p>Returns a tuple containing the name of the global group the local node belongs to, and the list of all other known @@ -98,53 +109,52 @@ </desc> </func> <func> - <name>info() -> [{Item, Info}]</name> + <name name="info" arity="0"/> <fsummary>Information about global groups</fsummary> - <type> - <v>Item, Info -- see below</v> - </type> + <type name="info_item"/> + <type name="sync_state"/> <desc> <p>Returns a list containing information about the global groups. Each element of the list is a tuple. The order of the tuples is not defined.</p> <taglist> - <tag><c>{state, State}</c></tag> + <tag><c>{state, <anno>State</anno>}</c></tag> <item> <p>If the local node is part of a global group, - <c>State == synced</c>. If no global groups are defined, - <c>State == no_conf</c>.</p> + <c><anno>State</anno> == synced</c>. If no global groups are defined, + <c><anno>State</anno> == no_conf</c>.</p> </item> - <tag><c>{own_group_name, GroupName}</c></tag> + <tag><c>{own_group_name, <anno>GroupName</anno>}</c></tag> <item> <p>The name (atom) of the group that the local node belongs to.</p> </item> - <tag><c>{own_group_nodes, Nodes}</c></tag> + <tag><c>{own_group_nodes, <anno>Nodes</anno>}</c></tag> <item> <p>A list of node names (atoms), the group nodes.</p> </item> - <tag><c>{synced_nodes, Nodes}</c></tag> + <tag><c>{synced_nodes, <anno>Nodes</anno>}</c></tag> <item> <p>A list of node names, the group nodes currently synchronized with the local node.</p> </item> - <tag><c>{sync_error, Nodes}</c></tag> + <tag><c>{sync_error, <anno>Nodes</anno>}</c></tag> <item> <p>A list of node names, the group nodes with which the local node has failed to synchronize.</p> </item> - <tag><c>{no_contact, Nodes}</c></tag> + <tag><c>{no_contact, <anno>Nodes</anno>}</c></tag> <item> <p>A list of node names, the group nodes to which there are currently no connections.</p> </item> - <tag><c>{other_groups, Groups}</c></tag> + <tag><c>{other_groups, <anno>Groups</anno>}</c></tag> <item> - <p><c>Groups</c> is a list of tuples - <c>{GroupName, Nodes}</c>, specifying the name and nodes + <p><c><anno>Groups</anno></c> is a list of tuples + <c>{<anno>GroupName</anno>, <anno>Nodes</anno>}</c>, specifying the name and nodes of the other global groups.</p> </item> - <tag><c>{monitoring, Pids}</c></tag> + <tag><c>{monitoring, <anno>Pids</anno>}</c></tag> <item> <p>A list of pids, specifying the processes which have subscribed to <c>nodeup</c> and <c>nodedown</c> messages.</p> @@ -153,73 +163,52 @@ </desc> </func> <func> - <name>monitor_nodes(Flag) -> ok </name> + <name name="monitor_nodes" arity="1"/> <fsummary>Subscribe to node status changes</fsummary> - <type> - <v>Flag = bool()</v> - </type> <desc> - <p>Depending on <c>Flag</c>, the calling process starts - subscribing (<c>Flag == true</c>) or stops subscribing - (<c>Flag == false</c>) to node status change messages.</p> + <p>Depending on <c><anno>Flag</anno></c>, the calling process starts + subscribing (<c><anno>Flag</anno> == true</c>) or stops subscribing + (<c><anno>Flag</anno> == false</c>) to node status change messages.</p> <p>A process which has subscribed will receive the messages <c>{nodeup, Node}</c> and <c>{nodedown, Node}</c> when a group node connects or disconnects, respectively.</p> </desc> </func> <func> - <name>own_nodes() -> Nodes</name> + <name name="own_nodes" arity="0"/> <fsummary>Return the group nodes</fsummary> - <type> - <v>Nodes = [Node]</v> - <v> Node = node()</v> - </type> <desc> <p>Returns the names of all group nodes, regardless of their current status.</p> </desc> </func> <func> - <name>registered_names(Where) -> Names</name> + <name name="registered_names" arity="1"/> <fsummary>Return globally registered names</fsummary> - <type> - <v>Where = {node, Node} | {group, GroupName}</v> - <v> Node = node()</v> - <v> GroupName = atom()</v> - <v>Names = [Name]</v> - <v> Name = atom()</v> - </type> <desc> <p>Returns a list of all names which are globally registered on the specified node or in the specified global group.</p> </desc> </func> <func> - <name>send(Name, Msg) -> pid() | {badarg, {Name, Msg}}</name> - <name>send(Where, Name, Msg) -> pid() | {badarg, {Name, Msg}}</name> + <name name="send" arity="2"/> + <name name="send" arity="3"/> <fsummary>Send a message to a globally registered pid</fsummary> - <type> - <v>Where = {node, Node} | {group, GroupName}</v> - <v> Node = node()</v> - <v> GroupName = atom()</v> - <v>Name = atom()</v> - <v>Msg = term()</v> - </type> <desc> - <p>Searches for <c>Name</c>, globally registered on + <p>Searches for <c><anno>Name</anno></c>, globally registered on the specified node or in the specified global group, or -- - if the <c>Where</c> argument is not provided -- in any global + if the <c><anno>Where</anno></c> argument is not provided -- in any global group. The global groups are searched in the order in which they appear in the value of the <c>global_groups</c> configuration parameter.</p> - <p>If <c>Name</c> is found, the message <c>Msg</c> is sent to + <p>If <c><anno>Name</anno></c> is found, the message <c><anno>Msg</anno></c> is sent to the corresponding pid. The pid is also the return value of the function. If the name is not found, the function returns - <c>{badarg, {Name, Msg}}</c>.</p> + <c>{badarg, {<anno>Name</anno>, <anno>Msg</anno>}}</c>.</p> </desc> </func> <func> - <name>sync() -> ok</name> + <name name="sync" arity="0"/> <fsummary>Synchronize the group nodes</fsummary> <desc> <p>Synchronizes the group nodes, that is, the global name @@ -235,23 +224,17 @@ </desc> </func> <func> - <name>whereis_name(Name) -> pid() | undefined</name> - <name>whereis_name(Where, Name) -> pid() | undefined</name> + <name name="whereis_name" arity="1"/> + <name name="whereis_name" arity="2"/> <fsummary>Get the pid with a given globally registered name</fsummary> - <type> - <v>Where = {node, Node} | {group, GroupName}</v> - <v> Node = node()</v> - <v> GroupName = atom()</v> - <v>Name = atom()</v> - </type> <desc> - <p>Searches for <c>Name</c>, globally registered on + <p>Searches for <c><anno>Name</anno></c>, globally registered on the specified node or in the specified global group, or -- if - the <c>Where</c> argument is not provided -- in any global + the <c><anno>Where</anno></c> argument is not provided -- in any global group. The global groups are searched in the order in which they appear in the value of the <c>global_groups</c> configuration parameter.</p> - <p>If <c>Name</c> is found, the corresponding pid is returned. + <p>If <c><anno>Name</anno></c> is found, the corresponding pid is returned. If the name is not found, the function returns <c>undefined</c>.</p> </desc> |