log.html

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<TITLE>Logging a Message in a Servlet
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  <h3>
    e1038.  
    Logging a Message in a Servlet</h3>

The servlet container provides a simple logging facility for a servlet
to log text messages and exceptions.  For a more full-featured logging
facility, see the <code>java.util.logging</code> package.


<pre>
    // See also <a href="../javax.servlet/com_mycompany_MyServlet.html" class="eglink"><font size="-1"><b>e1034</b> The Quintessential Servlet</font></a>
    
    // Add an entry to the log file
    getServletContext().log(<font color="#0066ff"><i>"A message"</i></font>);
    
    try {
        // ...
    } catch (Exception e) {
        // Add an entry to the log file and include an exception
        getServletContext().log(<font color="#0066ff"><i>"An exception occurred"</i></font>, e);
    }
</pre>
Here's a sample of the log entries in Tomcat:

<pre>
    2002-07-06 21:12:54 A message
    2002-07-06 21:12:54 An exception occurred
    java.io.IOException
            at com.mycompany.MyServlet.doGet(Unknown Source)
            at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
            at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
            ...
</pre>
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            &nbsp;Related Examples
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e1034. <a class="eglink" href="com_mycompany_MyServlet.html?l=rel">
    The Quintessential Servlet
</a>
<br>

e1035. <a class="eglink" href="GetInit.html?l=rel">
    Getting and Setting Initialization Parameters for a Servlet
</a>
<br>

e1036. <a class="eglink" href="GetImage.html?l=rel">
    Returning an Image in a Servlet
</a>
<br>

e1037. <a class="eglink" href="State.html?l=rel">
    Saving Data in a Servlet
</a>
<br>


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