org.apache.maven.plugin

Class AbstractMojo

java.lang.Object

org.apache.maven.plugin.AbstractMojo

All Implemented Interfaces:

ContextEnabled, Mojo

public abstract class AbstractMojo
extends Object
implements Mojo, ContextEnabled

Abstract class to provide most of the infrastructure required to implement a Mojo except for the execute method.
The implementation should have a Mojo annotation with the name of the goal:

   @Mojo( name = "<goal-name>" )
 

There are also a number of attributes which can be used to control how and when the Mojo is executed:

mojo annotation attributes

Descriptor Element	Annotation	Required?	Notes
goal	name = "<goal-name>"	Yes	The name for the Mojo that users will reference from the command line to execute the Mojo directly, or inside a POM in order to provide Mojo-specific configuration.
implementation	none (detected)	Yes	The Mojo's fully-qualified class name (or script path in the case of non-Java Mojos).
language	none (detected)	No. Default: java	The implementation language for this Mojo (Java, beanshell, etc.).
configurator	configurator = "<role-hint>"	No	The configurator type to use when injecting parameter values into this Mojo. The value is normally deduced from the Mojo's implementation language, but can be specified to allow a custom ComponentConfigurator implementation to be used. NOTE: This will only be used in very special cases, using a highly controlled vocabulary of possible values. (Elements like this are why it's a good idea to use the descriptor tools.)
phase	defaultPhase = LifecyclePhase.<phase>	No	Binds this Mojo to a particular phase of the standard build lifecycle, if specified. NOTE: This is only required if this Mojo is to participate in the standard build process.
execute	@Execute ( phase=LifecyclePhase.<phase>, goal= "<goal-name>", lifecycle="<lifecycle-id>" )	No	When this goal is invoked, it will first invoke a parallel lifecycle, ending at the given phase. If a goal is provided instead of a phase, that goal will be executed in isolation. The execution of either will not affect the current project, but instead make available the ${executedProject} expression if required. An alternate lifecycle can also be provided: for more information see the documentation on the build lifecycle.
requiresDependencyResolution	requiresDependencyResolution = ResolutionScope.<scope>	No	Flags this Mojo as requiring the dependencies in the specified scope (or an implied scope) to be resolved before it can execute. NOTE: Currently supports compile, runtime, and test scopes.
description	none (detected)	No	The description of this Mojo's functionality. Using the toolset, this will be the class-level Javadoc description provided. NOTE: While this is not a required part of the Mojo specification, it SHOULD be provided to enable future tool support for browsing, etc. and for clarity.
parameters	N/A	No	Specifications for the parameters which this Mojo uses will be provided in parameter sub-elements in this section. NOTE: Parameters are discussed in more detail below.

This is only a small set of all the options. A complete list can be found at Maven Plugin Tool for Annotations.

Author:

Brett Porter, jdcasey, Vincent Siveton

See Also:

Guide to Developing Java Plugins, Guide to Configuring Plug-ins, Mojo API Specification

Field Summary

Fields inherited from interface org.apache.maven.plugin.Mojo

ROLE

Constructor Summary

Constructors

Constructor and Description
AbstractMojo()

Method Summary

Modifier and Type	Method and Description
Log	getLog() Returns the logger that has been injected into this mojo.
Map	getPluginContext()
void	setLog(Log log) Inject a standard Maven logging mechanism to allow this Mojo to communicate events and feedback to the user.
void	setPluginContext(Map pluginContext) Set a new shared context Map to a mojo before executing it.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.apache.maven.plugin.Mojo

execute

Constructor Detail

AbstractMojo

public AbstractMojo()

Method Detail

setLog

public void setLog(Log log)

Description copied from interface: Mojo

Inject a standard Maven logging mechanism to allow this Mojo to communicate events and feedback to the user.

Specified by:

setLog in interface Mojo

Parameters:

log - a new logger

getLog

public Log getLog()

Returns the logger that has been injected into this mojo. If no logger has been setup yet, a SystemStreamLog logger will be created and returned.

Note: The logger returned by this method must not be cached in an instance field during the construction of the mojo. This would cause the mojo to use a wrongly configured default logger when being run by Maven. The proper logger gets injected by the Plexus container after the mojo has been constructed. Therefore, simply call this method directly whenever you need the logger, it is fast enough and needs no caching.

Specified by:

getLog in interface Mojo

Returns:

a log4j-like logger object which allows plugins to create messages at levels of "debug", "info", "warn", and "error". This logger is the accepted means to display information to the user.

See Also:

Mojo.getLog()

getPluginContext

public Map getPluginContext()

Specified by:

getPluginContext in interface ContextEnabled

Returns:

a Map stored in the plugin container's context.

setPluginContext

public void setPluginContext(Map pluginContext)

Description copied from interface: ContextEnabled

Set a new shared context Map to a mojo before executing it.

Specified by:

setPluginContext in interface ContextEnabled

Parameters:

pluginContext - a new Map