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From sde...@apache.org
Subject cvs commit: logging-log4j/src/java/org/apache/log4j/chainsaw/help tutorial.html
Date Tue, 13 Apr 2004 07:13:42 GMT
sdeboy      2004/04/13 00:13:42

  Modified:    src/java/org/apache/log4j/chainsaw WelcomePanel.html
               src/java/org/apache/log4j/chainsaw/help tutorial.html
  Added information on color filters, display filters and expressions to tutorial.  Also added
note to bottom of welcome panel pointing to tutorial for futher information.
  Revision  Changes    Path
  1.7       +5 -0      logging-log4j/src/java/org/apache/log4j/chainsaw/WelcomePanel.html
  Index: WelcomePanel.html
  RCS file: /home/cvs/logging-log4j/src/java/org/apache/log4j/chainsaw/WelcomePanel.html,v
  retrieving revision 1.6
  retrieving revision 1.7
  diff -u -r1.6 -r1.7
  --- WelcomePanel.html	23 Mar 2004 07:00:22 -0000	1.6
  +++ WelcomePanel.html	13 Apr 2004 07:13:42 -0000	1.7
  @@ -100,5 +100,10 @@
   places it in the local Log4j bus.  A Receiver can be a 'sink' for event
   data, while the Appender is the 'source'.
  +<b>See the tutorial for more information on Chainsaw's features.</b>
  1.5       +104 -3    logging-log4j/src/java/org/apache/log4j/chainsaw/help/tutorial.html
  Index: tutorial.html
  RCS file: /home/cvs/logging-log4j/src/java/org/apache/log4j/chainsaw/help/tutorial.html,v
  retrieving revision 1.4
  retrieving revision 1.5
  diff -u -r1.4 -r1.5
  --- tutorial.html	23 Sep 2003 23:13:14 -0000	1.4
  +++ tutorial.html	13 Apr 2004 07:13:42 -0000	1.5
  @@ -5,6 +5,10 @@
  +<p><a href="#color_filter">Color filters</a>
  +<p><a href="#display_filter">Display filters</a>
  +<p><a href="#expressions">Expressions</a>
   <p>Welcome to the Chainsaw v2 Tutorial.  Here you will learn how to effectively utilise
the many features of Chainsaw.</p>
  @@ -100,11 +104,108 @@
   <li><img src="../icons/Help16.gif" alt="Try this...">Try clicking on the <img
src="../icons/Edit16.gif"> icon in the Event Detail toolbar, or popup menu to show the
Layout Pattern editor, and edit it to see how changes are reflected.</li>
  -<h2>Logger Tree panel</h2>
  +<h3>Logger Tree panel</h3>
   <font color="red"><b>TODO</b></font>
  +<A NAME="color_filter"><h3>Color filter</h3>
  +Each log panel can define color rules which can be used to colorize events in the event
panel.  Color rules are associated with each event panel and are saved when the application
ends and loaded automatically when the application starts.
  -<font color="red"><b>TODO</b></font>
  +<p><b>Define color rules:</b>
  +<li>Open the color filter panel by selecting the menu item 'current tab-log panel
color filter', or by using the context (right-click mouse) menu in the events panel and selecting
'log panel color filter'</li>
  +<li>Select 'new' to add a row</li>
  +<li>Double-click on the 'expression' column</li>
  +<li>Enter an expression (see <a href="#expressions">Expressions</a> section
  +<li>Select a color from the list or use the 'browse' button at the bottom of the
color list to define a custom color</li>
  +<li>Repeat steps 2 - 5 as needed</li>
  +<li>Order the rules - events are evaluated against color rules in order.  Select
a color rule entry and press the UP or DOWN icons on the panel as needed</li>
  +<li>Apply the rules.  The event panel will be updated based on the defined color
  +<li>If there are invalid expressions, a message at the bottom will direct you to
hover the mouse over an expression to see the error as the entry's tooltip</li>
  +<li>Fix errors as needed, apply and close the panel</li>
  +<A NAME="display_filter"><h3>Display filter (refine focus)</h3>
  +Events displayed in the event panel can be filtered one of two ways: by focusing on a logger
in the logger tree panel or by defining display filter rules in the 'refine focus' field.
 <b>NOTE:</b>Display filter rules are not saved. 
  +<p><b>Define display rules:</b>
  +<li>Move the cursor to the 'refine focus on' field</li>
  +<li>Enter an expression (see <a href="#expressions">Expressions</a> section
  +<li>Alternatively, use the context (mouse right click) menu available from the table
of events to either set the refine focus expression or augment the existing refine focus expression
based on the current mouse location.  For example, if the mouse pointer is in the LEVEL cell
of an event which has a value of INFO, selecting <b>set 'refine focus' field</b>
will assign the expression <b>LEVEL == 'INFO'</b> to the refine focus field.</li>
  +<li>The display will be updated automatically if the expression is valid once the
application sees you are not changing the expression (1 second delay)</li>
  +<li>If the expression is invalid (the list of events in the event panel doesn't change),
information describing the error is available as the 'refine focus on' field's tooltip</li>
  +<li>If the <b>ENTER</b> key is pressed when a valid expression is in
the 'refine focus on' field, the expression is added to the refine focus drop down list and
can be recalled later in the session (display filter rules are not saved)</li>
  +<A NAME="expressions"><h3>Expressions</h3>
  +<p>Expressions provide a flexible way of building display and color rules.  All of
the logging event's fields are available for evaluation, as well as a variety of operators.
  +<li>Multiple expressions can be evaluated together by using logical operators, and
precedence can be controlled by using parentheses</li>
  +<li>Operands and operators must be separated by spaces</li>
  +<li>Single tick marks can be used to delimit multi-word operands, for example: <b>msg
~= 'my msg'</b></li>
  +<li>Parentheses can be used to group expressions (remember to put spaces around the
  +<li><b>NOTE:</b> A context menu is available (via right-mouse click or
ctrl-space) to assist in constructing expressions</li>
  +<p><b>To define an expression:</b>
  +<li>Select the field identifier (a keyword representing a logging event field) needed
to perform the filtering operation.  For example, to filter on the 'message' portion of an
event, use the <b>MSG</b> field identifier</li>
  +<li>Select the operator needed to perform the filtering operation.  For example,
to perform a case-insensitive partial-text filtering operation, use the <b>~=</b>
  +<li>(Required by all operators except logical operators) Define the value to be matched
in the expression</li>
  +<p>For example, to display only events with the word 'result' in the message field,
the matching expression is <b>msg ~= result</b>
  +<b>Supported field identifiers:</b>
  +<li>PROP (properties)</li>
  +<li>To build expressions using <b>MDC</b> or <b>PROP (properties)</b>,
the key being evaluated must be added after the field identifier and a period.
  +   For example, every event contains a '<b>log4jid</b>' property (helpful during
import/export of events).  
  +   To refine the display to only show rows 50 through 60, specify this expression in the
'refine focus' text field: <b>PROP.log4jid &gt= 50 && PROP.log4jid &lt=
  +   <b>NOTE:</b> case matters when specifying the key.  <b>PROP.log4jid</b>
is <b>not</b> the same as <b>PROP.LOG4JID</b></li>
  +<p><b>Supported operators:</b></p>
  +<table border=1>
  +<tr><td align="center">==</td><td>equals</td></tr>
  +<tr><td align="center">~=</td><td>case-insensitive partial-text
  +<tr><td align="center">!=</td><td>not equals</td></tr>
  +<tr><td align="center">LIKE</td><td>supports regular expressions</td></tr>
  +<tr><td align="center">EXISTS</td><td>not null</td></tr>
  +<tr><td align="center">&lt</td><td rowspan="4">inequality operators</td></tr>
  +<tr><td align="center">&lt=</td></tr>
  +<tr><td align="center">&gt</td></tr>
  +<tr><td align="center">&gt=</td></tr>
  +<tr><td align="center">&&</td><td>logical and</td></tr>
  +<tr><td align="center">||</td><td>logical or</td></tr>
  +<tr><td align="center">!</td><td>logical not</td></tr>
  +<p><b>Operator limitations:</b>
  +<li>The equality operator can be used with the LEVEL identifier, but since it's executing
the equals method, use uppercase for the right-hand value (<b>LEVEL == WARN</b>
instead of <b>LEVEL == warn</b>)</li>
  +<li>Inequality operators are supported for Levels (<b>LEVEL &gt INFO</b>)
and anything that can be converted to a numeric value.</li>
  +<li>Expressions using the timestamp field are not yet supported</li>
  +<p><B>Example expressions:</B></p>
  +<table border = 1>
  +<tr><td>To display all events with a level of info or greater</td><td><b>LEVEL
&gt INFO</b></td></tr>
  +<tr><td>To display all events associated with the words 'logged in' in the
message</td><td> <b>MSG ~= 'logged in'</b></td></tr>
  +<tr><td>To display all events which contain an exception</td><td><b>EXCEPTION
  +<tr><td>To display all events associated with an MDC key of USERID with a value
of 'tester'</td><td><b>MDC.USERID == tester</b></td></tr>
  +<tr><td>'and' the first and second examples together, 'or'd with the third</td><td><b>(
LEVEL &gt INFO && MSG ~= 'logged in' ) || EXCEPTION EXISTS</b></td></tr>
   <h2>Shutting down the Tutorial</h2>

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