运行phing脚本时，它将把内容打印到控制台。这些消息要么是系统消息（例如BUILD STARTED），要么是您已在build.xml文件中放入的回显消息。所有这些输出均由记录器文件控制和创建。默认记录器称为（毫不奇怪）DefaultLogger，它将用作默认记录器。可以使用几种不同类型的记录器，所有这些记录器都可以在PEAR \ phing目录的侦听器文件夹中找到。
要选择要使用的其他记录器脚本，只需在phing调用中使用-logger标志。要指定DefaultLogger，请使用以下命令：
phing -logger phing.listener.DefaultLogger
若要指定XML记录器，该记录器将创建有关当前工作目录中发生的网络钓鱼事件的XML文档，请使用XmlLogger记录器。
phing -logger phing.listener.XmlLogger
那么，如果我们只想在构建文件中打印出回显消息，该怎么办？我们没有可以使用的记录器，因此可以简单地创建自己的解决方案。以下代码块包含一个记录器，该记录器将仅输出echo命令以及发生的任何错误以及完成构建所花费的时间。创建一个名为的文件EchoLogger.php，并将其放入PEAR \ phing \ listener目录。该文件中的许多注释来自DefaultLogger，我刚刚更改了不同的部分或不适用的部分。
<?php
require_once 'phing/BuildListener.php';
include_once 'phing/BuildEvent.php';
/**
* Writes all echo messages generated during a build event to the console.
*
* This is the only output generated by the logger with two exceptions. These
* are the total time taken for the build to run and any errors that occurred
* during the build.
*
* @author Philip Norton
* @see BuildEvent
* @package phing.listener
*/
class EchoLogger implements BuildListener {
/**
* Size of the left column in output. The default char width is 12.
* @var int
*/
const LEFT_COLUMN_SIZE = 12;
/**
* The message output level that should be used. The default is
* PROJECT_MSG_VERBOSE.
* @var int
*/
protected $msgOutputLevel = PROJECT_MSG_ERR;
/**
* Time that the build started
* @var int
*/
protected $startTime;
/**
* Char that should be used to seperate lines. Default is the system
* property <em>line.seperator</em>.
* @var string
*/
protected $lSep;
/**
* Construct a new default logger.
*/
public function __construct() {
$this->lSep = Phing::getProperty("line.separator");
}
/**
* Set the msgOutputLevel this logger is to respond to.
*
* Only messages with a message level lower than or equal to the given
* level are output to the log.
*
* <p> Constants for the message levels are in Project.php. The order of
* the levels, from least to most verbose, is:
*
* <ul>
* <li>PROJECT_MSG_ERR</li>
* <li>PROJECT_MSG_WARN</li>
* <li>PROJECT_MSG_INFO</li>
* <li>PROJECT_MSG_VERBOSE</li>
* <li>PROJECT_MSG_DEBUG</li>
* </ul>
*
* The default message level for DefaultLogger is PROJECT_MSG_ERR.
*
* @param integer the logging level for the logger.
* @access public
*/
function setMessageOutputLevel($level) {
$this->msgOutputLevel = (int) $level;
}
/**
* Sets the start-time when the build started. Used for calculating
* the build-time.
*
* @param object The BuildEvent
* @access public
*/
function buildStarted(BuildEvent $event) {
$this->startTime = Phing::currentTimeMillis();
}
/**
* Prints whether the build failed, and any errors that occured during
the build. Also outputs the total build-time on completion.
*
* @param object The BuildEvent
* @access public
* @see BuildEvent::getException()
*/
function buildFinished(BuildEvent $event) {
$error = $event->getException();
if ($error !== null) {
print($this->lSep . "BUILD FAILED" . $this->lSep);
if (PROJECT_MSG_VERBOSE <= $this->msgOutputLevel || !($error instanceof BuildException)) {
print($error->__toString().$this->lSep);
} else {
print($error->getMessage());
}
}
print($this->lSep . "Total time: " .$this->_formatTime(Phing::currentTimeMillis() - $this->startTime) . $this->lSep);
}
/**
* Fired when a target has started. We don't need specific action on this
* event. So the methods are empty.
*
* @param object The BuildEvent
* @access public
* @see BuildEvent::getTarget()
*/
function targetStarted(BuildEvent $event) {}
/**
* Fired when a target has finished. We don't need specific action on this
* event. So the methods are empty.
*
* @param object The BuildEvent
* @access public
* @see BuildEvent::getException()
*/
function targetFinished(BuildEvent $event) {}
/**
* Fired when a task is started. We don't need specific action on this
* event. So the methods are empty.
*
* @param object The BuildEvent
* @access public
* @see BuildEvent::getTask()
*/
function taskStarted(BuildEvent $event) {}
/**
* Fired when a task has finished. We don't need specific action on this
* event. So the methods are empty.
*
* @param object The BuildEvent
* @access public
* @see BuildEvent::getException()
*/
function taskFinished(BuildEvent $event) {}
/**
* Print any echo messages to the stdout.
*
* @param object The BuildEvent
* @access public
* @see BuildEvent::getMessage()
*/
function messageLogged(BuildEvent $event) {
if ($event->getPriority() <= $this->msgOutputLevel) {
$msg = "";
if ($event->getTask() !== null) {
$name = $event->getTask();
$name = $name->getTaskName();
if ($name == 'echo') {
$msg = "[$name] ";
$msg .= $event->getMessage();
$this->printMessage($msg, $event->getPriority());
}
}
}
}
/**
* Formats a time micro integer to human readable format.
*
* @param integer The time stamp
* @access private
*/
function _formatTime($micros) {
$seconds = $micros;
$minutes = $seconds / 60;
if ($minutes > 1) {
return sprintf("%1.0f minute%s %0.2f second%s",
$minutes, ($minutes === 1 ? " " : "s "),
$seconds - floor($seconds/60) * 60, ($seconds%60 === 1 ? "" : "s"));
} else {
return sprintf("%0.4f second%s", $seconds, ($seconds%60 === 1 ? "" : "s"));
}
}
/**
* Prints a message to console.
*
* @param string $message The message to print.
* Should not be null.
* @param int $priority The priority of the message.
* (Ignored in this implementation.)
* @return void
*/
protected function printMessage($message, $priority) {
print($message . $this->lSep);
}
}现在，您可以使用以下命令来调用新的记录器。
phing -logger phing.listener.EchoLogger
仅打印回显命令以及运行脚本所花费的时间。如果遇到任何错误，将以正常方式打印。