content/release-doc/current/internals/net/jini/lookup/JoinManager.DiscardProxyTask.html - river-site - Git at Google

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 <h2 title="Class JoinManager.DiscardProxyTask" class="title">Class JoinManager.DiscardProxyTask</h2>
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 <li><a href="../../../net/jini/lookup/JoinManager.JoinTask.html" title="class in net.jini.lookup">net.jini.lookup.JoinManager.JoinTask</a></li>
 <li>
 <ul class="inheritance">
 <li>net.jini.lookup.JoinManager.DiscardProxyTask</li>
 </ul>
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 <dt>Enclosing class:</dt>
 <dd><a href="../../../net/jini/lookup/JoinManager.html" title="class in net.jini.lookup">JoinManager</a></dd>
 </dl>
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 <pre>private class <span class="typeNameLabel">JoinManager.DiscardProxyTask</span>
 extends <a href="../../../net/jini/lookup/JoinManager.JoinTask.html" title="class in net.jini.lookup">JoinManager.JoinTask</a></pre>
 <div class="block">Task that asynchronously requests the cancellation of the lease
   on the <code>ServiceRegistration</code> referenced by the given
   <code>ProxyReg</code> object. The lease to be cancelled was granted
   by the lookup service whose proxy is also referenced by the given
   <code>ProxyReg</code> object. This task is executed whenever that
   lookup service is discarded.

   Note that although this task is executed upon receipt of any type
   of lookup service discard event, there is one type of discard
   that this task is actually intended to address: the so-called
   "lost-interest" discard. A discard corresponding to a loss of
   interest is an indication that the discarded lookup service is
   still up and available, but the discovery manager employed by
   this join manager (not the join manager or the service itself)
   discards the lookup service because the service is no longer
   interested in being registered with that lookup service. This
   loss of interest is caused by a change in either the lookup
   service's member groups or the service's groups-to-discover.
   Such a change in groups would typically be made administratively,
   through either the lookup service's administrative interface or
   through the service's administrative interface (or both).

   When the lookup service is discarded because of a loss of
   interest, there is a time period in which the service is still
   registered with the lookup service, even though the service no
   longer wishes to be registered with that lookup service. To
   address this, the lease is cancelled so that the service is
   removed from the lookup service in a much more timely fashion
   than simply allowing the lease to expire.

   As stated above, this task is also executed upon receipt of
   the other types of discard event. But because those other
   discard types occur when the lookup service is no longer
   available, the lease cancellation that is attempted here has
   no significant effect.</div>
 <dl>
 <dt><span class="seeLabel">See Also:</span></dt>
 <dd><a href="../../../net/jini/lookup/JoinManager.DiscMgrListener.html#discarded-net.jini.discovery.DiscoveryEvent-"><code>JoinManager.DiscMgrListener.discarded(net.jini.discovery.DiscoveryEvent)</code></a></dd>
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 <h3>Fields inherited from class&nbsp;net.jini.lookup.<a href="../../../net/jini/lookup/JoinManager.JoinTask.html" title="class in net.jini.lookup">JoinManager.JoinTask</a></h3>
 <code><a href="../../../net/jini/lookup/JoinManager.JoinTask.html#proxyReg">proxyReg</a></code></li>
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 <td class="colOne"><code><span class="memberNameLink"><a href="../../../net/jini/lookup/JoinManager.DiscardProxyTask.html#DiscardProxyTask-net.jini.lookup.JoinManager.ProxyReg-">DiscardProxyTask</a></span>(<a href="../../../net/jini/lookup/JoinManager.ProxyReg.html" title="class in net.jini.lookup">JoinManager.ProxyReg</a>&nbsp;proxyReg)</code>
 <div class="block">Constructor that provides this task with access (through the given
   <code>ProxyReg</code> parameter) to the lease to be cancelled.</div>
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 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../net/jini/lookup/JoinManager.DiscardProxyTask.html#run--">run</a></span>()</code>
 <div class="block">Requests the cancellation of the lease on the
   <code>ServiceRegistration</code> that is referenced in the
   <code>proxyReg</code> data structure.</div>
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 <h4>DiscardProxyTask</h4>
 <pre>DiscardProxyTask(<a href="../../../net/jini/lookup/JoinManager.ProxyReg.html" title="class in net.jini.lookup">JoinManager.ProxyReg</a>&nbsp;proxyReg)</pre>
 <div class="block">Constructor that provides this task with access (through the given
   <code>ProxyReg</code> parameter) to the lease to be cancelled.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>proxyReg</code> - data structure that references the
                    <code>ServiceRegistration</code> and associated
                    lease whose cancellation is to be requested</dd>
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 <h4>run</h4>
 <pre>public&nbsp;void&nbsp;run()</pre>
 <div class="block">Requests the cancellation of the lease on the
   <code>ServiceRegistration</code> that is referenced in the
   <code>proxyReg</code> data structure.</div>
 <dl>
 <dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
 <dd><code><a href="../../../net/jini/lookup/JoinManager.JoinTask.html#run--">run</a></code>&nbsp;in class&nbsp;<code><a href="../../../net/jini/lookup/JoinManager.JoinTask.html" title="class in net.jini.lookup">JoinManager.JoinTask</a></code></dd>
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	<h2 title="Class JoinManager.DiscardProxyTask" class="title">Class JoinManager.DiscardProxyTask</h2>
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	<ul class="inheritance">
	<li><a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">java.lang.Object</a></li>
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	<li><a href="../../../net/jini/lookup/JoinManager.JoinTask.html" title="class in net.jini.lookup">net.jini.lookup.JoinManager.JoinTask</a></li>
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	<li>net.jini.lookup.JoinManager.DiscardProxyTask</li>
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	<dd><a href="../../../net/jini/lookup/JoinManager.html" title="class in net.jini.lookup">JoinManager</a></dd>
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	<br>
	<pre>private class <span class="typeNameLabel">JoinManager.DiscardProxyTask</span>
	extends <a href="../../../net/jini/lookup/JoinManager.JoinTask.html" title="class in net.jini.lookup">JoinManager.JoinTask</a></pre>
	<div class="block">Task that asynchronously requests the cancellation of the lease
	on the <code>ServiceRegistration</code> referenced by the given
	<code>ProxyReg</code> object. The lease to be cancelled was granted
	by the lookup service whose proxy is also referenced by the given
	<code>ProxyReg</code> object. This task is executed whenever that
	lookup service is discarded.

	Note that although this task is executed upon receipt of any type
	of lookup service discard event, there is one type of discard
	that this task is actually intended to address: the so-called
	"lost-interest" discard. A discard corresponding to a loss of
	interest is an indication that the discarded lookup service is
	still up and available, but the discovery manager employed by
	this join manager (not the join manager or the service itself)
	discards the lookup service because the service is no longer
	interested in being registered with that lookup service. This
	loss of interest is caused by a change in either the lookup
	service's member groups or the service's groups-to-discover.
	Such a change in groups would typically be made administratively,
	through either the lookup service's administrative interface or
	through the service's administrative interface (or both).

	When the lookup service is discarded because of a loss of
	interest, there is a time period in which the service is still
	registered with the lookup service, even though the service no
	longer wishes to be registered with that lookup service. To
	address this, the lease is cancelled so that the service is
	removed from the lookup service in a much more timely fashion
	than simply allowing the lease to expire.

	As stated above, this task is also executed upon receipt of
	the other types of discard event. But because those other
	discard types occur when the lookup service is no longer
	available, the lease cancellation that is attempted here has
	no significant effect.</div>
	<dl>
	<dt><span class="seeLabel">See Also:</span></dt>
	<dd><a href="../../../net/jini/lookup/JoinManager.DiscMgrListener.html#discarded-net.jini.discovery.DiscoveryEvent-"><code>JoinManager.DiscMgrListener.discarded(net.jini.discovery.DiscoveryEvent)</code></a></dd>
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	<h3>Fields inherited from class net.jini.lookup.<a href="../../../net/jini/lookup/JoinManager.JoinTask.html" title="class in net.jini.lookup">JoinManager.JoinTask</a></h3>
	<code><a href="../../../net/jini/lookup/JoinManager.JoinTask.html#proxyReg">proxyReg</a></code></li>
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	<td class="colOne"><code><span class="memberNameLink"><a href="../../../net/jini/lookup/JoinManager.DiscardProxyTask.html#DiscardProxyTask-net.jini.lookup.JoinManager.ProxyReg-">DiscardProxyTask</a></span>(<a href="../../../net/jini/lookup/JoinManager.ProxyReg.html" title="class in net.jini.lookup">JoinManager.ProxyReg</a> proxyReg)</code>
	<div class="block">Constructor that provides this task with access (through the given
	<code>ProxyReg</code> parameter) to the lease to be cancelled.</div>
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	<td class="colFirst"><code>void</code></td>
	<td class="colLast"><code><span class="memberNameLink"><a href="../../../net/jini/lookup/JoinManager.DiscardProxyTask.html#run--">run</a></span>()</code>
	<div class="block">Requests the cancellation of the lease on the
	<code>ServiceRegistration</code> that is referenced in the
	<code>proxyReg</code> data structure.</div>
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	<h4>DiscardProxyTask</h4>
	<pre>DiscardProxyTask(<a href="../../../net/jini/lookup/JoinManager.ProxyReg.html" title="class in net.jini.lookup">JoinManager.ProxyReg</a> proxyReg)</pre>
	<div class="block">Constructor that provides this task with access (through the given
	<code>ProxyReg</code> parameter) to the lease to be cancelled.</div>
	<dl>
	<dt><span class="paramLabel">Parameters:</span></dt>
	<dd><code>proxyReg</code> - data structure that references the
	<code>ServiceRegistration</code> and associated
	lease whose cancellation is to be requested</dd>
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	<h4>run</h4>
	<pre>public void run()</pre>
	<div class="block">Requests the cancellation of the lease on the
	<code>ServiceRegistration</code> that is referenced in the
	<code>proxyReg</code> data structure.</div>
	<dl>
	<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
	<dd><code><a href="../../../net/jini/lookup/JoinManager.JoinTask.html#run--">run</a></code> in class <code><a href="../../../net/jini/lookup/JoinManager.JoinTask.html" title="class in net.jini.lookup">JoinManager.JoinTask</a></code></dd>
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