Package org.apache.tools.ant

Class DefaultLogger

java.lang.Object

org.apache.tools.ant.DefaultLogger

All Implemented Interfaces:

EventListener, BuildListener, BuildLogger

Direct Known Subclasses:

AnsiColorLogger, MailLogger, NoBannerLogger, ProfileLogger, SilentLogger, TimestampedLogger

public class DefaultLogger
extends Object
implements BuildLogger

Writes build events to a PrintStream. Currently, it only writes which targets are being executed, and any messages that get logged.

Field Summary

Fields

Modifier and Type	Field	Description
protected boolean	emacsMode	Whether or not to use emacs-style output
protected PrintStream	err	PrintStream to write error messages to
static final int	LEFT_COLUMN_SIZE	Size of left-hand column for right-justified task name.
protected static final String	lSep	Deprecated.
protected int	msgOutputLevel	Lowest level of message to write out
protected PrintStream	out	PrintStream to write non-error messages to

Constructor Summary

Constructors

Constructor	Description
DefaultLogger()	Sole constructor.

Method Summary

Modifier and Type	Method	Description
void	buildFinished(BuildEvent event)	Prints whether the build succeeded or failed, any errors the occurred during the build, and how long the build took.
void	buildStarted(BuildEvent event)	Responds to a build being started by just remembering the current time.
protected String	extractProjectName(BuildEvent event)	Get the project name or null
protected static String	formatTime(long millis)	Convenience method to format a specified length of time.
protected String	getBuildFailedMessage()	This is an override point: the message that indicates whether a build failed.
protected String	getBuildSuccessfulMessage()	This is an override point: the message that indicates that a build succeeded.
int	getMessageOutputLevel()
protected String	getTimestamp()	Get the current time.
protected void	log(String message)	Empty implementation which allows subclasses to receive the same output that is generated here.
void	messageLogged(BuildEvent event)	Logs a message, if the priority is suitable.
protected void	printMessage(String message, PrintStream stream, int priority)	Prints a message to a PrintStream.
void	setEmacsMode(boolean emacsMode)	Sets this logger to produce emacs (and other editor) friendly output.
void	setErrorPrintStream(PrintStream err)	Sets the output stream to which this logger is to send error messages.
void	setMessageOutputLevel(int level)	Sets the highest level of message this logger should respond to.
void	setOutputPrintStream(PrintStream output)	Sets the output stream to which this logger is to send its output.
void	targetFinished(BuildEvent event)	No-op implementation.
void	targetStarted(BuildEvent event)	Logs a message to say that the target has started if this logger allows information-level messages.
void	taskFinished(BuildEvent event)	No-op implementation.
void	taskStarted(BuildEvent event)	No-op implementation.

Methods inherited from class java.lang.Object

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

Field Details

LEFT_COLUMN_SIZE

public static final int LEFT_COLUMN_SIZE

Size of left-hand column for right-justified task name.

See Also:

• messageLogged(BuildEvent)
• Constant Field Values

out

protected PrintStream out

PrintStream to write non-error messages to

err

protected PrintStream err

PrintStream to write error messages to

msgOutputLevel

protected int msgOutputLevel

Lowest level of message to write out

lSep

@Deprecated
protected static final String lSep

Deprecated.

Line separator

emacsMode

protected boolean emacsMode

Whether or not to use emacs-style output

Constructor Details

DefaultLogger

public DefaultLogger()

Sole constructor.

Method Details

setMessageOutputLevel

public void setMessageOutputLevel(int level)

Sets the highest level of message this logger should respond to. Only messages with a message level lower than or equal to the given level should be written to the log.

Constants for the message levels are in the Project class. The order of the levels, from least to most verbose, is MSG_ERR, MSG_WARN, MSG_INFO, MSG_VERBOSE, MSG_DEBUG.

The default message level for DefaultLogger is Project.MSG_ERR.

Specified by:

setMessageOutputLevel in interface BuildLogger

Parameters:

level - the logging level for the logger.

getMessageOutputLevel

public int getMessageOutputLevel()

Specified by:

getMessageOutputLevel in interface BuildLogger

Returns:

Returns the currently set message output level. The default implementation of this method returns MSG_INFO.

setOutputPrintStream

public void setOutputPrintStream(PrintStream output)

Sets the output stream to which this logger is to send its output.

Specified by:

setOutputPrintStream in interface BuildLogger

Parameters:

output - The output stream for the logger. Must not be null.

setErrorPrintStream

public void setErrorPrintStream(PrintStream err)

Sets the output stream to which this logger is to send error messages.

Specified by:

setErrorPrintStream in interface BuildLogger

Parameters:

err - The error stream for the logger. Must not be null.

setEmacsMode

public void setEmacsMode(boolean emacsMode)

Sets this logger to produce emacs (and other editor) friendly output.

Specified by:

setEmacsMode in interface BuildLogger

Parameters:

emacsMode - true if output is to be unadorned so that emacs and other editors can parse files names, etc.

buildStarted

public void buildStarted(BuildEvent event)

Responds to a build being started by just remembering the current time.

Specified by:

buildStarted in interface BuildListener

Parameters:

event - Ignored.

buildFinished

public void buildFinished(BuildEvent event)

Prints whether the build succeeded or failed, any errors the occurred during the build, and how long the build took.

Specified by:

buildFinished in interface BuildListener

Parameters:

event - An event with any relevant extra information. Must not be null.

See Also:

• BuildEvent.getException()

getBuildFailedMessage

protected String getBuildFailedMessage()

This is an override point: the message that indicates whether a build failed. Subclasses can change/enhance the message.

Returns:

The classic "BUILD FAILED"

getBuildSuccessfulMessage

protected String getBuildSuccessfulMessage()

This is an override point: the message that indicates that a build succeeded. Subclasses can change/enhance the message.

Returns:

The classic "BUILD SUCCESSFUL"

targetStarted

public void targetStarted(BuildEvent event)

Logs a message to say that the target has started if this logger allows information-level messages.

Specified by:

targetStarted in interface BuildListener

Parameters:

event - An event with any relevant extra information. Must not be null.

See Also:

• BuildEvent.getTarget()

targetFinished

public void targetFinished(BuildEvent event)

No-op implementation.

Specified by:

targetFinished in interface BuildListener

Parameters:

event - Ignored.

See Also:

• BuildEvent.getException()

taskStarted

public void taskStarted(BuildEvent event)

No-op implementation.

Specified by:

taskStarted in interface BuildListener

Parameters:

event - Ignored.

See Also:

• BuildEvent.getTask()

taskFinished

public void taskFinished(BuildEvent event)

No-op implementation.

Specified by:

taskFinished in interface BuildListener

Parameters:

event - Ignored.

See Also:

• BuildEvent.getException()

messageLogged

public void messageLogged(BuildEvent event)

Logs a message, if the priority is suitable. In non-emacs mode, task level messages are prefixed by the task name which is right-justified.

Specified by:

messageLogged in interface BuildListener

Parameters:

event - A BuildEvent containing message information. Must not be null.

See Also:

• BuildEvent.getMessage()
• BuildEvent.getException()
• BuildEvent.getPriority()

formatTime

protected static String formatTime(long millis)

Convenience method to format a specified length of time.

Parameters:

millis - Length of time to format, in milliseconds.

Returns:

the time as a formatted string.

See Also:

• DateUtils.formatElapsedTime(long)

printMessage

protected void printMessage(String message,
 PrintStream stream,
 int priority)

Prints a message to a PrintStream.

Parameters:

message - The message to print. Should not be null.

stream - A PrintStream to print the message to. Must not be null.

priority - The priority of the message. (Ignored in this implementation.)

log

protected void log(String message)

Empty implementation which allows subclasses to receive the same output that is generated here.

Parameters:

message - Message being logged. Should not be null.

getTimestamp

protected String getTimestamp()

Get the current time.

Returns:

the current time as a formatted string.

Since:

Ant1.7.1

extractProjectName

protected String extractProjectName(BuildEvent event)

Get the project name or null

Parameters:

event - the event

Returns:

the project that raised this event

Since:

Ant1.7.1