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<div class="subTitle">org.osgi.service.log</div>
<h2 title="Interface LogService" class="title">Interface LogService</h2>
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<pre>public interface <span class="typeNameLabel">LogService</span></pre>
<div class="block">Provides methods for bundles to write messages to the log.
<p>
<code>LogService</code> methods are provided to log messages; optionally with a
<code>ServiceReference</code> object or an exception.
<p>
Bundles must log messages in the OSGi environment with a severity level
according to the following hierarchy:
<ol>
<li><a href="../../../../org/osgi/service/log/LogService.html#LOG_ERROR"><code>LOG_ERROR</code></a></li>
<li><a href="../../../../org/osgi/service/log/LogService.html#LOG_WARNING"><code>LOG_WARNING</code></a></li>
<li><a href="../../../../org/osgi/service/log/LogService.html#LOG_INFO"><code>LOG_INFO</code></a></li>
<li><a href="../../../../org/osgi/service/log/LogService.html#LOG_DEBUG"><code>LOG_DEBUG</code></a></li>
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<h3>Field Summary</h3>
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<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Field and Description</th>
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<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/osgi/service/log/LogService.html#LOG_DEBUG">LOG_DEBUG</a></span></code>
<div class="block">A debugging message (Value 4).</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/osgi/service/log/LogService.html#LOG_ERROR">LOG_ERROR</a></span></code>
<div class="block">An error message (Value 1).</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/osgi/service/log/LogService.html#LOG_INFO">LOG_INFO</a></span></code>
<div class="block">An informational message (Value 3).</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/osgi/service/log/LogService.html#LOG_WARNING">LOG_WARNING</a></span></code>
<div class="block">A warning message (Value 2).</div>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/osgi/service/log/LogService.html#log-int-java.lang.String-">log</a></span>(int level,
java.lang.String message)</code>
<div class="block">Logs a message.</div>
</td>
</tr>
<tr id="i1" class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/osgi/service/log/LogService.html#log-int-java.lang.String-java.lang.Throwable-">log</a></span>(int level,
java.lang.String message,
java.lang.Throwable exception)</code>
<div class="block">Logs a message with an exception.</div>
</td>
</tr>
<tr id="i2" class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/osgi/service/log/LogService.html#log-org.osgi.framework.ServiceReference-int-java.lang.String-">log</a></span>(org.osgi.framework.ServiceReference sr,
int level,
java.lang.String message)</code>
<div class="block">Logs a message associated with a specific <code>ServiceReference</code>
object.</div>
</td>
</tr>
<tr id="i3" class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/osgi/service/log/LogService.html#log-org.osgi.framework.ServiceReference-int-java.lang.String-java.lang.Throwable-">log</a></span>(org.osgi.framework.ServiceReference sr,
int level,
java.lang.String message,
java.lang.Throwable exception)</code>
<div class="block">Logs a message with an exception associated and a
<code>ServiceReference</code> object.</div>
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<h4>LOG_ERROR</h4>
<pre>static final int LOG_ERROR</pre>
<div class="block">An error message (Value 1).
<p>
This log entry indicates the bundle or service may not be functional.</div>
<dl>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../../../../constant-values.html#org.osgi.service.log.LogService.LOG_ERROR">Constant Field Values</a></dd>
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<h4>LOG_WARNING</h4>
<pre>static final int LOG_WARNING</pre>
<div class="block">A warning message (Value 2).
<p>
This log entry indicates a bundle or service is still functioning but may
experience problems in the future because of the warning condition.</div>
<dl>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../../../../constant-values.html#org.osgi.service.log.LogService.LOG_WARNING">Constant Field Values</a></dd>
</dl>
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<h4>LOG_INFO</h4>
<pre>static final int LOG_INFO</pre>
<div class="block">An informational message (Value 3).
<p>
This log entry may be the result of any change in the bundle or service
and does not indicate a problem.</div>
<dl>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../../../../constant-values.html#org.osgi.service.log.LogService.LOG_INFO">Constant Field Values</a></dd>
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<h4>LOG_DEBUG</h4>
<pre>static final int LOG_DEBUG</pre>
<div class="block">A debugging message (Value 4).
<p>
This log entry is used for problem determination and may be irrelevant to
anyone but the bundle developer.</div>
<dl>
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<dd><a href="../../../../constant-values.html#org.osgi.service.log.LogService.LOG_DEBUG">Constant Field Values</a></dd>
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<h4>log</h4>
<pre>void log(int level,
java.lang.String message)</pre>
<div class="block">Logs a message.
<p>
The <code>ServiceReference</code> field and the <code>Throwable</code> field of the
<code>LogEntry</code> object will be set to <code>null</code>.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>level</code> - The severity of the message. This should be one of the
defined log levels but may be any integer that is interpreted in a
user defined way.</dd>
<dd><code>message</code> - Human readable string describing the condition or
<code>null</code>.</dd>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../../../../org/osgi/service/log/LogService.html#LOG_ERROR"><code>LOG_ERROR</code></a>,
<a href="../../../../org/osgi/service/log/LogService.html#LOG_WARNING"><code>LOG_WARNING</code></a>,
<a href="../../../../org/osgi/service/log/LogService.html#LOG_INFO"><code>LOG_INFO</code></a>,
<a href="../../../../org/osgi/service/log/LogService.html#LOG_DEBUG"><code>LOG_DEBUG</code></a></dd>
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<h4>log</h4>
<pre>void log(int level,
java.lang.String message,
java.lang.Throwable exception)</pre>
<div class="block">Logs a message with an exception.
<p>
The <code>ServiceReference</code> field of the <code>LogEntry</code> object will be
set to <code>null</code>.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>level</code> - The severity of the message. This should be one of the
defined log levels but may be any integer that is interpreted in a
user defined way.</dd>
<dd><code>message</code> - The human readable string describing the condition or
<code>null</code>.</dd>
<dd><code>exception</code> - The exception that reflects the condition or
<code>null</code>.</dd>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../../../../org/osgi/service/log/LogService.html#LOG_ERROR"><code>LOG_ERROR</code></a>,
<a href="../../../../org/osgi/service/log/LogService.html#LOG_WARNING"><code>LOG_WARNING</code></a>,
<a href="../../../../org/osgi/service/log/LogService.html#LOG_INFO"><code>LOG_INFO</code></a>,
<a href="../../../../org/osgi/service/log/LogService.html#LOG_DEBUG"><code>LOG_DEBUG</code></a></dd>
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<h4>log</h4>
<pre>void log(org.osgi.framework.ServiceReference sr,
int level,
java.lang.String message)</pre>
<div class="block">Logs a message associated with a specific <code>ServiceReference</code>
object.
<p>
The <code>Throwable</code> field of the <code>LogEntry</code> will be set to
<code>null</code>.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>sr</code> - The <code>ServiceReference</code> object of the service that this
message is associated with or <code>null</code>.</dd>
<dd><code>level</code> - The severity of the message. This should be one of the
defined log levels but may be any integer that is interpreted in a
user defined way.</dd>
<dd><code>message</code> - Human readable string describing the condition or
<code>null</code>.</dd>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../../../../org/osgi/service/log/LogService.html#LOG_ERROR"><code>LOG_ERROR</code></a>,
<a href="../../../../org/osgi/service/log/LogService.html#LOG_WARNING"><code>LOG_WARNING</code></a>,
<a href="../../../../org/osgi/service/log/LogService.html#LOG_INFO"><code>LOG_INFO</code></a>,
<a href="../../../../org/osgi/service/log/LogService.html#LOG_DEBUG"><code>LOG_DEBUG</code></a></dd>
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<h4>log</h4>
<pre>void log(org.osgi.framework.ServiceReference sr,
int level,
java.lang.String message,
java.lang.Throwable exception)</pre>
<div class="block">Logs a message with an exception associated and a
<code>ServiceReference</code> object.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>sr</code> - The <code>ServiceReference</code> object of the service that this
message is associated with.</dd>
<dd><code>level</code> - The severity of the message. This should be one of the
defined log levels but may be any integer that is interpreted in a
user defined way.</dd>
<dd><code>message</code> - Human readable string describing the condition or
<code>null</code>.</dd>
<dd><code>exception</code> - The exception that reflects the condition or
<code>null</code>.</dd>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../../../../org/osgi/service/log/LogService.html#LOG_ERROR"><code>LOG_ERROR</code></a>,
<a href="../../../../org/osgi/service/log/LogService.html#LOG_WARNING"><code>LOG_WARNING</code></a>,
<a href="../../../../org/osgi/service/log/LogService.html#LOG_INFO"><code>LOG_INFO</code></a>,
<a href="../../../../org/osgi/service/log/LogService.html#LOG_DEBUG"><code>LOG_DEBUG</code></a></dd>
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