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CppCMS 1.2 introduces a new plugin API together with new improved support of dynamic templates
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## Writing Plugins
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Plugins are shared object that can register their functions within `cppcms::plugin::manager` singleton. For example:
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For example you write some class that implements a certain API:
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namespace myplugin {
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class my_class : public plugin_api {
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public:
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statuc my_class *create(std::string const ¶meter)
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{
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return new my_class(parameter);
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}
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...
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};
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}
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Than you can register it within the `plugin::manager` using special macro.
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CPPCMS_PLUGIN_ENTRY(myplugin,my_class::create,plugin_api *(std::string const &))
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Note: the 3rd parameter that defines the signature of the entry for typesafe plugin access.
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Than you can access the required plugins from the main code calling
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// callback object
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booster::callback<plugin_api *(std::string const &)> cb;
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// get it from plugin
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cb = cppcms::manager::instance().entry<plugin_api *(std::string const &)>("myplugin","my_class::create");
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// call it
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plugin_api *ptr = cb("foo");
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## Loading plugins
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`cppcms::service` allows to load the plugins [from the configuration](/wikipp/en/page/cppcms_1x_config#plugin)
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You can also link the views with the same plugin and they will be loaded automatically.
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## Template System Support
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In order to create dynamically loaded templates from plugins, there are several improvements in template systems:
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New [view helpers](/wikipp/en/page/cppcms_1x_templates_comm#Views.Helpers) allow to call specific functions from templates by their names |
You can create [abstract and inline views](/wikipp/en/page/cppcms_1x_templates_block#view) so plugins can easily extend them.
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Using new [view helpers](/wikipp/en/page/cppcms_1x_templates_comm#Views.Helpers) you can call specific functions from templates by their names
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<% using master_api as m from a_skin, "api" %>
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<% include foo() from m %>
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<% end using %>
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You can use specific `gettext` [domain](/wikipp/en/page/cppcms_1x_templates_comm#Selecting.localization.domain) for each of the views separately so plugin can run withing its own domain transparently from its caller. |
