Bukkit

WhatIs aims to be the essential server debugging tool enabling you to see how each plugin interacts with, and controls your bukkit server.

Features

Command lookup

Find what plugin is responsible for a command as well as basic information about it

Event registration lookup

Find what plugins are registering handlers for what events

Event monitoring

See exactly what happened in the course of an events execution!

General registration reports

See what each plugin is registering (events, commands, tasks, permissions, and services)

Help combat server lag

Find entity concentrations that may be harming your server

Commands

/whatis command <command>

Looks up basic information about <command> such as: Owning plugin, description, permission, and aliases

/whatis event plugin <plugin>

Shows a list of all event handlers registered by <plugin>

/whatis event count <eventName>

Shows a list of the number of handlers each plugin has of this event

/whatis event handlers <eventName>

Shows a list of all the handlers for this event, in the exact order they will be invoked

/whatis eventmonitor <eventName> <ticks> [filter]

Monitors an event closely recording what each handler does to the event as it is executed.
Filters can be used if desired. Format: [<name>=<value>, <name>=<value>, ...]
!= can be used as well as =. = and != are actually contains and not contains in this case
<name> can be a special name too:

• @plugin the name of the handlers plugin
• @listener the class name of the listener
• @priority the priority of the handler
• @ignorecancel true or false, whether the handler ignores canceled events
  Example: Example EventReport from 1.0.0

/whatis report

Creates a report of all registered objects by plugins
Example: Example Report

/whatis tps

Shows the current tps as well as the tick times for the last 40 ticks (2 seconds) and the tick history for the last 2 minutes

/whatis dependencies (of|for) <plugin>

When specified with 'for', all dependencies of the specified plugin are shown
When specified with 'of', all plugins that mark the specified plugin as a dependency are shown

/whatis entities [world]

Shows concentrations of entities either in [world] or everywhere
Can help find lag causing clumps of entities such as xp grinders.

/whatis chunk [<x> <z> [world]]

Shows what players are keeping the specified chunk loaded
This will also show if the chunk is being loaded by being in the spawn region

Permissions

whatis.command

Gives access to /whatis command
Default: op

whatis.report

Gives access to /whatis report
Default: op

whatis.event

Gives access to all /whatis event ... commands
Default: op

whatis.eventmonitor

Gives access to /whatis eventmonitor
Default: op

whatis.tps

Gives access to /whatis tps
Default: op

whatis.dependencies

Gives access to /whatis dependencies
Default: op

whatis.entity

Gives access to /whatis entity
Default: op

whatis.chunk

Gives access to /whatis chunk
Default: op

Source Code and Contributing

SourceCode for WhatIs is available on GitHub

Feel free to submit ideas, pull requests, bugs, or whatever on either the ticket page here, or on GitHub