| Interface | Description | 
|---|---|
| LifeCycleHook | Provides a method in which users can hook into the startup and shutdown lifecycle of Gremlin Server. | 
| Class | Description | 
|---|---|
| DefaultGraphManager | Holder for  GraphandTraversalSourceinstances configured for the server to be passed to script
 engine bindings. | 
| ExceptionHelper | Utility class for working with exceptions. | 
| GremlinServerInstall | Command line installer for plugins to Gremlin Server. | 
| LifeCycleHook.Context | Contains objects from the server that might be useful to scripting during the startup and shutdown process. | 
| ServerGremlinExecutor | The core of script execution in Gremlin Server. | 
| SideEffectIterator | |
| ThreadFactoryUtil | |
| TraverserIterator | 
| Enum | Description | 
|---|---|
| MetricManager | Singleton that contains and configures Gremlin Server's  MetricRegistry. | 
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