A class that demonstrates some of the functionality * of a custom logger.
*/ public class BuildEventLogger implements BuildLogger { /** * PrintStream to write non-error messages to. */ private PrintStream out; /** * PrintStream to write error messages to. */ private PrintStream err; /** * Sets whether to tailor output for Emacs, etc. * The default isfalse
.
*/
private boolean emacsMode = false;
/**
* We'll set this logger to log only warnings.
*/
private int msgOutputLevel = Project.MSG_WARN;
/**
* Signals that a build has started. This event * is fired before any targets have started.
* * @param start An event with any relevant extra information. * Must not benull
.
*/
public final void buildStarted(final BuildEvent start) {
start.getProject().log("Message from buildStarted().", Project.MSG_ERR);
}
/**
* Signals that the last target has finished. This event * will still be fired if an error occurred during the build.
* * @param finish An event with any relevant extra information. * Must not benull
.
*
* @see BuildEvent#getException()
*/
public void buildFinished(final BuildEvent finish) {
// empty
}
/**
* Signals that a target is starting.
* * @param start An event with any relevant extra information. * Must not benull
.
*
* @see BuildEvent#getTarget()
*/
public void targetStarted(final BuildEvent start) {
// empty
}
/**
* Signals that a target has finished. This event will * still be fired if an error occurred during the build.
* * @param finish An event with any relevant extra information. * Must not benull
.
*
* @see BuildEvent#getException()
*/
public void targetFinished(final BuildEvent finish) {
// empty
}
/**
* Signals that a task is starting.
* * @param start An event with any relevant extra information. * Must not benull
.
*
* @see BuildEvent#getTask()
*/
public void taskStarted(final BuildEvent start) {
// empty
}
/**
* Signals that a task has finished. This event will still * be fired if an error occurred during the build.
* * @param finish An event with any relevant extra information. * Must not benull
.
*
* @see BuildEvent#getException()
*/
public void taskFinished(final BuildEvent finish) {
// empty
}
/** When a message is sent to this logger, Ant calls this method.
* @param event An event with any relevant extra information. * Must not benull
.
*
* @see BuildEvent#getMessage()
* @see BuildEvent#getPriority()
*/
public final void messageLogged(final BuildEvent event) {
/// We need to determine how important this message is
int priority = event.getPriority();
// If it's as important as our log level, we display it
if (priority <= msgOutputLevel) {
out.println("messageLogged: " + event.getMessage());
}
}
/**
* Sets the output stream to which this logger is to send its output.
* * @param output The output stream for the logger. * Must not benull
.
*/
public final void setOutputPrintStream(final PrintStream output) {
this.out = new PrintStream(output, true);
}
/**
* Sets the output stream to which this logger * is to send error messages.
* * @param errorStream The error stream for the logger. * Must not benull
.
*/
public final void setErrorPrintStream(final PrintStream errorStream) {
this.err = new PrintStream(errorStream, true);
}
/**
* Sets this logger to produce Emacs * (and other editor) friendly output.
* * @param modetrue
if output is to be unadorned so that
* Emacs and other editors can parse files names, etc.
*/
public final void setEmacsMode(final boolean mode) {
this.emacsMode = mode;
}
/**
* 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
* {@link Project 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 for this logger is * {@link Project#MSG_WARN Project.MSG_WARN}.
* * @param level the logging level for the logger. */ public void setMessageOutputLevel(final int level) { // We will leave this empty to use the default level, // which we set above } } AntWriteOurOwnTask.zip( 157 k)