org.apache.tools.ant

Class DefaultLogger

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

Constructor Summary
	DefaultLogger() Sole constructor.

Method Summary
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.
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.

Field Detail

emacsMode

protected boolean emacsMode

Whether or not to use emacs-style output

err

protected PrintStream err

PrintStream to write error messages to

lSep

protected static final String lSep

Line separator

LEFT_COLUMN_SIZE

public static final int LEFT_COLUMN_SIZE

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

msgOutputLevel

protected int msgOutputLevel

Lowest level of message to write out

out

protected PrintStream out

PrintStream to write non-error messages to

Method Detail

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.

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

buildStarted

public void buildStarted(BuildEvent event)

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

Parameters: event Ignored.

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

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.

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"

getTimestamp

protected String getTimestamp()

Get the current time.

Returns: the current time as a formatted string.

Since: Ant1.7.1

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.

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.

Parameters: event A BuildEvent containing message information. Must not be null.

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.)

setEmacsMode

public void setEmacsMode(boolean emacsMode)

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

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

setErrorPrintStream

public void setErrorPrintStream(PrintStream err)

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

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

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.

Parameters: level the logging level for the logger.