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<h2 title="Interface UnfilteredServiceListener" class="title">Interface UnfilteredServiceListener</h2>
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<dt>All Superinterfaces:</dt>
<dd>java.util.EventListener, <a href="../../../org/osgi/framework/ServiceListener.html" title="interface in org.osgi.framework">ServiceListener</a></dd>
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<pre>@ConsumerType
public interface <span class="strong">UnfilteredServiceListener</span>
extends <a href="../../../org/osgi/framework/ServiceListener.html" title="interface in org.osgi.framework">ServiceListener</a></pre>
<div class="block">A <code>ServiceEvent</code> listener that does <i>not</i> filter based upon any
filter string specified to
<a href="../../../org/osgi/framework/BundleContext.html#addServiceListener(org.osgi.framework.ServiceListener,%20java.lang.String)"><code>BundleContext.addServiceListener(ServiceListener, String)</code></a>. Using an
<code>UnfilteredServiceListener</code> and specifying a filter string to
<a href="../../../org/osgi/framework/BundleContext.html#addServiceListener(org.osgi.framework.ServiceListener,%20java.lang.String)"><code>BundleContext.addServiceListener(ServiceListener, String)</code></a> allows the
listener to receive all <code>ServiceEvent</code> objects while still advising
<a href="../../../org/osgi/framework/hooks/service/ListenerHook.html" title="interface in org.osgi.framework.hooks.service"><code>ListenerHook</code></a> implementation of the service interests in the filter
string.
For example, an implementation of Declarative Services would add an
<code>UnfilteredServiceListener</code> with a filter string listing all the
services referenced by all the service components. The Declarative Services
implementation would receive all <code>ServiceEvent</code> objects for internal
processing and a Remote Services discovery service implementation can observe
the service interests of the service components using a <a href="../../../org/osgi/framework/hooks/service/ListenerHook.html" title="interface in org.osgi.framework.hooks.service"><code>ListenerHook</code></a>.
When the set of service components being processed changes, the Declarative
Services implementation would re-add the <code>UnfilteredServiceListener</code>
with an updated filter string.
<p>
When a <code>ServiceEvent</code> is fired, it is synchronously delivered to an
<code>UnfilteredServiceListener</code>. The Framework may deliver
<code>ServiceEvent</code> objects to an <code>UnfilteredServiceListener</code> out of
order and may concurrently call and/or reenter an
<code>UnfilteredServiceListener</code>.
<p>
An <code>UnfilteredServiceListener</code> object is registered with the Framework
using the <code>BundleContext.addServiceListener</code> method.
<code>UnfilteredServiceListener</code> objects are called with a
<code>ServiceEvent</code> object when a service is registered, modified, or is in
the process of unregistering.
<p>
<code>ServiceEvent</code> object delivery to <code>UnfilteredServiceListener</code>
objects are <i>not</i> filtered by the filter specified when the listener was
registered. If the Java Runtime Environment supports permissions, then some
filtering is done. <code>ServiceEvent</code> objects are only delivered to the
listener if the bundle which defines the listener object's class has the
appropriate <code>ServicePermission</code> to get the service using at least one
of the named classes under which the service was registered.</div>
<dl><dt><span class="strong">Since:</span></dt>
<dd>1.7</dd>
<dt><span class="strong">See Also:</span></dt><dd><a href="../../../org/osgi/framework/ServiceEvent.html" title="class in org.osgi.framework"><code>ServiceEvent</code></a>,
<a href="../../../org/osgi/framework/ServicePermission.html" title="class in org.osgi.framework"><code>ServicePermission</code></a></dd></dl>
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<h3>Methods inherited from interface org.osgi.framework.<a href="../../../org/osgi/framework/ServiceListener.html" title="interface in org.osgi.framework">ServiceListener</a></h3>
<code><a href="../../../org/osgi/framework/ServiceListener.html#serviceChanged(org.osgi.framework.ServiceEvent)">serviceChanged</a></code></li>
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