Package org.elasticsearch.plugins

Class Plugin

    • Constructor Detail

      • Plugin

        public Plugin()

    • Method Detail

      • createGuiceModules

        public Collection<Module> createGuiceModules()
        Node level guice modules.

      • getGuiceServiceClasses

        public Collection<Class<? extends LifecycleComponent>> getGuiceServiceClasses()
        Node level services that will be automatically started/stopped/closed. This classes must be constructed by injection with guice.

      • createComponents

        public Collection<Object> createComponents​(Client client,
                                           ClusterService clusterService,
                                           ThreadPool threadPool,
                                           ResourceWatcherService resourceWatcherService,
                                           ScriptService scriptService,
                                           NamedXContentRegistry xContentRegistry,
                                           Environment environment,
                                           NodeEnvironment nodeEnvironment,
                                           NamedWriteableRegistry namedWriteableRegistry)
        Returns components added by this plugin. Any components returned that implement LifecycleComponent will have their lifecycle managed. Note: To aid in the migration away from guice, all objects returned as components will be bound in guice to themselves.
        Parameters:
        client - A client to make requests to the system
        clusterService - A service to allow watching and updating cluster state
        threadPool - A service to allow retrieving an executor to run an async action
        resourceWatcherService - A service to watch for changes to node local files
        scriptService - A service to allow running scripts on the local node
        xContentRegistry - the registry for extensible xContent parsing
        environment - the environment for path and setting configurations
        nodeEnvironment - the node environment used coordinate access to the data paths
        namedWriteableRegistry - the registry for NamedWriteable object parsing

      • additionalSettings

        public Settings additionalSettings()
        Additional node settings loaded by the plugin. Note that settings that are explicit in the nodes settings can't be overwritten with the additional settings. These settings added if they don't exist.

      • onIndexModule

        public void onIndexModule​(IndexModule indexModule)
        Called before a new index is created on a node. The given module can be used to register index-level extensions.

      • getSettings

        public List<Setting<?>> getSettings()
        Returns a list of additional Setting definitions for this plugin.

      • getSettingsFilter

        public List<String> getSettingsFilter()
        Returns a list of additional settings filter for this plugin

      • getSettingUpgraders

        public List<SettingUpgrader<?>> getSettingUpgraders()
        Get the setting upgraders provided by this plugin.
        Returns:
        the settings upgraders

      • getIndexTemplateMetaDataUpgrader

        public UnaryOperator<Map<String,​IndexTemplateMetaData>> getIndexTemplateMetaDataUpgrader()
        Provides a function to modify index template meta data on startup.

        Plugins should return the input template map via UnaryOperator.identity() if no upgrade is required.

        The order of the template upgrader calls is undefined and can change between runs so, it is expected that plugins will modify only templates owned by them to avoid conflicts.

        Returns:
        Never null. The same or upgraded IndexTemplateMetaData map.
        Throws:
        IllegalStateException - if the node should not start because at least one IndexTemplateMetaData cannot be upgraded

      • getExecutorBuilders

        public List<ExecutorBuilder<?>> getExecutorBuilders​(Settings settings)
        Provides the list of this plugin's custom thread pools, empty if none.
        Parameters:
        settings - the current settings
        Returns:
        executors builders for this plugin's custom thread pools

      • getBootstrapChecks

        public List<BootstrapCheck> getBootstrapChecks()
        Returns a list of checks that are enforced when a node starts up once a node has the transport protocol bound to a non-loopback interface. In this case we assume the node is running in production and all bootstrap checks must pass. This allows plugins to provide a better out of the box experience by pre-configuring otherwise (in production) mandatory settings or to enforce certain configurations like OS settings or 3rd party resources.