xmllogger.java

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     *
     * @param event An event with any relevant extra information.
     *              Will not be <code>null</code>.
     */
    public void targetFinished(BuildEvent event) {
        Target target = event.getTarget();
        TimedElement targetElement = (TimedElement) targets.get(target);
        if (targetElement != null) {
            long totalTime
                    = System.currentTimeMillis() - targetElement.startTime;
            targetElement.element.setAttribute(TIME_ATTR,
                    DefaultLogger.formatTime(totalTime));

            TimedElement parentElement = null;
            Stack threadStack = getStack();
            if (!threadStack.empty()) {
                TimedElement poppedStack = (TimedElement) threadStack.pop();
                if (poppedStack != targetElement) {
                    throw new RuntimeException("Mismatch - popped element = "
                            + poppedStack
                            + " finished target element = "
                            + targetElement);
                }
                if (!threadStack.empty()) {
                    parentElement = (TimedElement) threadStack.peek();
                }
            }
            if (parentElement == null) {
                buildElement.element.appendChild(targetElement.element);
            } else {
                parentElement.element.appendChild(targetElement.element);
            }
        }
        targets.remove(target);
    }

    /**
     * Fired when a task starts building, this pushes a timed element
     * for the task onto the stack of elements for the current thread,
     * remembering the current time and the name of the task.
     *
     * @param event An event with any relevant extra information.
     *              Will not be <code>null</code>.
     */
    public void taskStarted(BuildEvent event) {
        TimedElement taskElement = new TimedElement();
        taskElement.startTime = System.currentTimeMillis();
        taskElement.element = doc.createElement(TASK_TAG);

        Task task = event.getTask();
        String name = event.getTask().getTaskName();
        if (name == null) {
            name = "";
        }
        taskElement.element.setAttribute(NAME_ATTR, name);
        taskElement.element.setAttribute(LOCATION_ATTR,
                event.getTask().getLocation().toString());
        tasks.put(task, taskElement);
        getStack().push(taskElement);
    }

    /**
     * Fired when a task finishes building, this adds the time taken
     * and any error stacktrace to the appropriate task element in the log.
     *
     * @param event An event with any relevant extra information.
     *              Will not be <code>null</code>.
     */
    public void taskFinished(BuildEvent event) {
        Task task = event.getTask();
        TimedElement taskElement = (TimedElement) tasks.get(task);
        if (taskElement != null) {
            long totalTime = System.currentTimeMillis() - taskElement.startTime;
            taskElement.element.setAttribute(TIME_ATTR,
                    DefaultLogger.formatTime(totalTime));
            Target target = task.getOwningTarget();
            TimedElement targetElement = null;
            if (target != null) {
                targetElement = (TimedElement) targets.get(target);
            }
            if (targetElement == null) {
                buildElement.element.appendChild(taskElement.element);
            } else {
                targetElement.element.appendChild(taskElement.element);
            }
            Stack threadStack = getStack();
            if (!threadStack.empty()) {
                TimedElement poppedStack = (TimedElement) threadStack.pop();
                if (poppedStack != taskElement) {
                    throw new RuntimeException("Mismatch - popped element = "
                            + poppedStack + " finished task element = "
                            + taskElement);
                }
            }
            tasks.remove(task);
        } else {
            throw new RuntimeException("Unknown task " + task + " not in " + tasks);
        }
    }


    /**
     * Get the TimedElement associated with a task.
     *
     * Where the task is not found directly, search for unknown elements which
     * may be hiding the real task
     */
    private TimedElement getTaskElement(Task task) {
        TimedElement element = (TimedElement) tasks.get(task);
        if (element != null) {
            return element;
        }

        for (Enumeration e = tasks.keys(); e.hasMoreElements();) {
            Task key = (Task) e.nextElement();
            if (key instanceof UnknownElement) {
                if (((UnknownElement) key).getTask() == task) {
                    return (TimedElement) tasks.get(key);
                }
            }
        }

        return null;
    }

    /**
     * Fired when a message is logged, this adds a message element to the
     * most appropriate parent element (task, target or build) and records
     * the priority and text of the message.
     *
     * @param event An event with any relevant extra information.
     *              Will not be <code>null</code>.
     */
    public void messageLogged(BuildEvent event) {
        int priority = event.getPriority();
        if (priority > msgOutputLevel) {
            return;
        }
        Element messageElement = doc.createElement(MESSAGE_TAG);

        String name = "debug";
        switch (event.getPriority()) {
            case Project.MSG_ERR:
                name = "error";
                break;
            case Project.MSG_WARN:
                name = "warn";
                break;
            case Project.MSG_INFO:
                name = "info";
                break;
            default:
                name = "debug";
                break;
        }
        messageElement.setAttribute(PRIORITY_ATTR, name);

        Throwable ex = event.getException();
        if (Project.MSG_DEBUG <= msgOutputLevel && ex != null) {
            Text errText = doc.createCDATASection(StringUtils.getStackTrace(ex));
            Element stacktrace = doc.createElement(STACKTRACE_TAG);
            stacktrace.appendChild(errText);
            buildElement.element.appendChild(stacktrace);
        }
        Text messageText = doc.createCDATASection(event.getMessage());
        messageElement.appendChild(messageText);

        TimedElement parentElement = null;

        Task task = event.getTask();

        Target target = event.getTarget();
        if (task != null) {
            parentElement = getTaskElement(task);
        }
        if (parentElement == null && target != null) {
            parentElement = (TimedElement) targets.get(target);
        }

        /*
        if (parentElement == null) {
            Stack threadStack
                    = (Stack) threadStacks.get(Thread.currentThread());
            if (threadStack != null) {
                if (!threadStack.empty()) {
                    parentElement = (TimedElement) threadStack.peek();
                }
            }
        }
        */

        if (parentElement != null) {
            parentElement.element.appendChild(messageElement);
        } else {
            buildElement.element.appendChild(messageElement);
        }
    }

    // -------------------------------------------------- BuildLogger interface

    /**
     * Set the logging level when using this as a Logger
     *
     * @param level the logging level -
     *        see {@link org.apache.tools.ant.Project#MSG_ERR Project}
     *        class for level definitions
     */
    public void setMessageOutputLevel(int level) {
        msgOutputLevel = level;
    }

    /**
     * Set the output stream to which logging output is sent when operating
     * as a logger.
     *
     * @param output the output PrintStream.
     */
    public void setOutputPrintStream(PrintStream output) {
        this.outStream = new PrintStream(output, true);
    }

    /**
     * Ignore emacs mode, as it has no meaning in XML format
     *
     * @param emacsMode true if logger should produce emacs compatible
     *        output
     */
    public void setEmacsMode(boolean emacsMode) {
    }

    /**
     * Ignore error print stream. All output will be written to
     * either the XML log file or the PrintStream provided to
     * setOutputPrintStream
     *
     * @param err the stream we are going to ignore.
     */
    public void setErrorPrintStream(PrintStream err) {
    }

}