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260 lines
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260 lines
12 KiB
HTML
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
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<title>Logging</title>
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<link rel="stylesheet" href="gettingStarted.css" type="text/css" />
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<meta name="generator" content="DocBook XSL Stylesheets V1.73.2" />
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<link rel="start" href="index.html" title="Getting Started with Berkeley DB Java Edition" />
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<link rel="up" href="administration.html" title="Chapter 12. Administering Berkeley DB Java Edition Applications" />
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<link rel="prev" href="commandlinetools.html" title="The Command Line Tools" />
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<link rel="next" href="concurrentProcessing.html" title="Appendix A. Concurrent Processing in Berkeley DB Java Edition" />
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</head>
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<body>
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<div xmlns="" class="navheader">
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<div class="libver">
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<p>Library Version 12.2.7.5</p>
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</div>
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<table width="100%" summary="Navigation header">
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<tr>
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<th colspan="3" align="center">Logging</th>
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</tr>
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<tr>
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<td width="20%" align="left"><a accesskey="p" href="commandlinetools.html">Prev</a> </td>
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<th width="60%" align="center">Chapter 12. Administering Berkeley DB Java Edition Applications</th>
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<td width="20%" align="right"> <a accesskey="n" href="concurrentProcessing.html">Next</a></td>
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</tr>
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</table>
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<hr />
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</div>
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<div class="sect1" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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<h2 class="title" style="clear: both"><a id="managelogging"></a>Logging</h2>
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</div>
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</div>
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</div>
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<div class="toc">
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<dl>
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<dt>
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<span class="sect2">
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<a href="managelogging.html#logginglevels">Managing Logging Levels</a>
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</span>
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</dt>
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<dt>
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<span class="sect2">
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<a href="managelogging.html#handlerlevels">Managing Handler Levels</a>
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</span>
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</dt>
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</dl>
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</div>
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<p>
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JE uses the <a class="ulink" href="http://java.sun.com/j2se/1.5.0/docs/api/java/util/logging/package-summary.html" target="_top">java.util.logging</a> package to
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log operations and trace messages. A distinct logger is defined for
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each significant component of the system. The use of distinct loggers, along with
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controllable logging levels, allows the logging output to be
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tuned to tell you exactly what you need to know (while avoiding a lot of
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extra information that only gets in the way) in order to monitor
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your application's activities and/or debug runtime problems.
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</p>
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<p>
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Logging output can be displayed to the console and the
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<code class="filename">je.info</code> file in your application's
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environment directory. Setting the logger level controls the
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types of messages that are published to the handlers. Setting the handler level
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determines if and where the published messages are displayed.
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</p>
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<div class="sect2" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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<h3 class="title"><a id="logginglevels"></a>Managing Logging Levels</h3>
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</div>
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</div>
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</div>
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<p>
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The default logging level for JE loggers is
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<code class="literal">INFO</code>. At that level, a non-replicated
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environment issues messages only when critical exceptions are
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encountered. A replicated environment issues node transition
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messages which should be comprehensible to the user familiar with
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the replication group life cycle and can be extremely useful when
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monitoring your application's activities. The output at the
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<code class="literal">INFO</code> is not verbose; it simply details the
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node start up and shutdown operations. Initial configuration
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problems, if any, should show up during the startup operation.
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You are strongly advised to run your production application with
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this level of logging.
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</p>
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<p>
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Finer levels of logging are available for debugging purposes.
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These will generate verbose output that is rich in implementation
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detail. The output at these levels is only likely to be helpful
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to people familiar with JE's implementation and the
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application's use of JE, so you should only configure your logging
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for these more verbose levels if you are involved in a detailed
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debugging effort.
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</p>
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<p>
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To set or change the logger level <span class="emphasis"><em>before</em></span> the environment is
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opened, do one of the following:
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</p>
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<div class="orderedlist">
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<ol type="1">
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<li>
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<p>
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Set logging levels using the standard Java <a class="ulink" href="http://java.sun.com/j2se/1.5.0/docs/api/java/util/logging/LogManager.html" target="_top">LogManager</a>
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properties file. For example, you can set:
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</p>
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<pre class="programlisting">com.sleepycat.je.level=INFO</pre>
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<p>
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in the <a class="ulink" href="http://java.sun.com/j2se/1.5.0/docs/api/java/util/logging/LogManager.html" target="_top">LogManager</a> properties file to set the logger
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level for all JE loggers.
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</p>
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</li>
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<li>
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<p>
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Set logging levels programmatically using the
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<a class="ulink" href="http://java.sun.com/j2se/1.5.0/docs/api/java/util/logging/package-summary.html" target="_top">java.util.logging</a> API. For example:
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</p>
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<pre class="programlisting">...
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// All other imports are omitted for brevity
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import java.util.logging.Logger;
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...
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Logger parent = Logger.getLogger("com.sleepycat.je");
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parent.setLevel(Level.FINE); // Loggers will now publish more
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// detailed messages. </pre>
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</li>
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</ol>
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</div>
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<p>
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To set or change the logger level <span class="emphasis"><em>after</em></span> the environment is
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opened, do one of the following:
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</p>
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<div class="orderedlist">
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<ol type="1">
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<li>
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<p>
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Use the standard java.util.logging MBean to set a
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concrete JE logger.
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</p>
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</li>
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<li>
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<p>
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Use the JEDiagnostic MBean to set the parent
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<code class="literal">com.sleepycat.je</code> logger.
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See the <a class="ulink" href="..//jconsole/JConsole-plugin.html" target="_top">JConsole Plugin</a> page for information on
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this MBean.
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</p>
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</li>
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<li>
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<p>
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Use the programmatic <a class="ulink" href="http://java.sun.com/j2se/1.5.0/docs/api/java/util/logging/package-summary.html" target="_top">java.util.logging</a> API described
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above to change the logger.
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</p>
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</li>
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</ol>
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</div>
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</div>
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<div class="sect2" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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<h3 class="title"><a id="handlerlevels"></a>Managing Handler Levels</h3>
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</div>
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</div>
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</div>
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<p>
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Output to the <code class="filename">je.info</code> file is managed by
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the JE <a class="ulink" href="../java/com/sleepycat/je/util/FileHandler.html" target="_top">FileHandler</a>, while output to the console is managed
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by the JE <a class="ulink" href="../java/com/sleepycat/je/util/ConsoleHandler.html" target="_top">ConsoleHandler</a>. By default, no output is shown on
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the console, and only <code class="literal">INFO</code> level messages are
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sent to <code class="filename">je.info</code>.
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</p>
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<p>
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To set or change the handler level <span class="emphasis"><em>before</em></span> the environment is
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opened, do one of the following:
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</p>
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<div class="orderedlist">
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<ol type="1">
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<li>
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<p>
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Set logging levels using the standard Java
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<a class="ulink" href="http://java.sun.com/j2se/1.5.0/docs/api/java/util/logging/LogManager.html" target="_top">LogManager</a> properties file. For example, you can
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set:
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</p>
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<pre class="programlisting">com.sleepycat.je.util.FileHandler.level=ALL
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com.sleepycat.je.util.ConsoleHandler.level=ALL</pre>
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<p>
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in the <a class="ulink" href="http://java.sun.com/j2se/1.5.0/docs/api/java/util/logging/LogManager.html" target="_top">LogManager</a> properties file to display all
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logging output to the console and
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<code class="filename">je.info</code> files.
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</p>
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</li>
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<li>
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<p>
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The <a class="ulink" href="http://java.sun.com/j2se/1.5.0/docs/api/java/util/logging/package-summary.html" target="_top">java.util.logging</a> package does not supply an
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API for setting handler levels. Instead, use the
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following JE environment parameter:
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</p>
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<pre class="programlisting">...
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EnvironmentConfig envConfig = new EnvironmentConfig();
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envConfig.setAllowCreate(true);
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envConfig.setConfigParam(EnvironmentConfig.FILE_LOGGING_LEVEL, "ALL");
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envConfig.setConfigParam(EnvironmentConfig.CONSOLE_LOGGING_LEVEL,
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"ALL");
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...
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// Open your environment as normal here
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... </pre>
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</li>
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</ol>
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</div>
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<p>
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To set or change the handler level <span class="emphasis"><em>after</em></span> the environment is
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opened, do one of the following:
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</p>
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<div class="orderedlist">
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<ol type="1">
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<li>
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<p>
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Use <a class="ulink" href="../java/com/sleepycat/je/EnvironmentMutableConfig.html#setConfigParam(java.lang.String, java.lang.String)" target="_top">EnvironmentMutableConfig.setConfigParam()</a> to change the
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handler levels using the JE properties described
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above.
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</p>
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</li>
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<li>
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<p>
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Use the JEDiagnostic MBean to change handler levels.
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See the <a class="ulink" href="..//jconsole/JConsole-plugin.html" target="_top">JConsole Plugin</a> page for information on
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this MBean.
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</p>
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</li>
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</ol>
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</div>
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</div>
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</div>
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<div class="navfooter">
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<hr />
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||
<table width="100%" summary="Navigation footer">
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||
<tr>
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||
<td width="40%" align="left"><a accesskey="p" href="commandlinetools.html">Prev</a> </td>
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||
<td width="20%" align="center">
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<a accesskey="u" href="administration.html">Up</a>
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||
</td>
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||
<td width="40%" align="right"> <a accesskey="n" href="concurrentProcessing.html">Next</a></td>
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||
</tr>
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<tr>
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<td width="40%" align="left" valign="top">The Command Line Tools </td>
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<td width="20%" align="center">
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<a accesskey="h" href="index.html">Home</a>
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</td>
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<td width="40%" align="right" valign="top"> Appendix A. Concurrent Processing in Berkeley DB Java Edition</td>
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</tr>
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</table>
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</div>
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</body>
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</html>
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