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| <h2 title="Class ServiceOperations.ServiceListeners" class="title">Class ServiceOperations.ServiceListeners</h2> |
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| <li>org.apache.hadoop.service.ServiceOperations.ServiceListeners</li> |
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| <pre>public static class <span class="typeNameLabel">ServiceOperations.ServiceListeners</span> |
| extends <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></pre> |
| <div class="block">Class to manage a list of <a href="../../../../org/apache/hadoop/service/ServiceStateChangeListener.html" title="interface in org.apache.hadoop.service"><code>ServiceStateChangeListener</code></a> instances, |
| including a notification loop that is robust against changes to the list |
| during the notification process.</div> |
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| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/service/ServiceOperations.ServiceListeners.html#ServiceListeners--">ServiceListeners</a></span>()</code> </td> |
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| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/service/ServiceOperations.ServiceListeners.html#add-org.apache.hadoop.service.ServiceStateChangeListener-">add</a></span>(<a href="../../../../org/apache/hadoop/service/ServiceStateChangeListener.html" title="interface in org.apache.hadoop.service">ServiceStateChangeListener</a> l)</code> |
| <div class="block">Thread-safe addition of a new listener to the end of a list.</div> |
| </td> |
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| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/service/ServiceOperations.ServiceListeners.html#notifyListeners-org.apache.hadoop.service.Service-">notifyListeners</a></span>(<a href="../../../../org/apache/hadoop/service/Service.html" title="interface in org.apache.hadoop.service">Service</a> service)</code> |
| <div class="block">Change to a new state and notify all listeners.</div> |
| </td> |
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| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/service/ServiceOperations.ServiceListeners.html#remove-org.apache.hadoop.service.ServiceStateChangeListener-">remove</a></span>(<a href="../../../../org/apache/hadoop/service/ServiceStateChangeListener.html" title="interface in org.apache.hadoop.service">ServiceStateChangeListener</a> l)</code> |
| <div class="block">Remove any registration of a listener from the listener list.</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/apache/hadoop/service/ServiceOperations.ServiceListeners.html#reset--">reset</a></span>()</code> |
| <div class="block">Reset the listener list</div> |
| </td> |
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| <h4>ServiceListeners</h4> |
| <pre>public ServiceListeners()</pre> |
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| <h4>add</h4> |
| <pre>public void add(<a href="../../../../org/apache/hadoop/service/ServiceStateChangeListener.html" title="interface in org.apache.hadoop.service">ServiceStateChangeListener</a> l)</pre> |
| <div class="block">Thread-safe addition of a new listener to the end of a list. |
| Attempts to re-register a listener that is already registered |
| will be ignored.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>l</code> - listener</dd> |
| </dl> |
| </li> |
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| <h4>remove</h4> |
| <pre>public boolean remove(<a href="../../../../org/apache/hadoop/service/ServiceStateChangeListener.html" title="interface in org.apache.hadoop.service">ServiceStateChangeListener</a> l)</pre> |
| <div class="block">Remove any registration of a listener from the listener list.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>l</code> - listener</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>true if the listener was found (and then removed)</dd> |
| </dl> |
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| <pre>public void reset()</pre> |
| <div class="block">Reset the listener list</div> |
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| <h4>notifyListeners</h4> |
| <pre>public void notifyListeners(<a href="../../../../org/apache/hadoop/service/Service.html" title="interface in org.apache.hadoop.service">Service</a> service)</pre> |
| <div class="block">Change to a new state and notify all listeners. |
| This method will block until all notifications have been issued. |
| It caches the list of listeners before the notification begins, |
| so additions or removal of listeners will not be visible.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>service</code> - the service that has changed state</dd> |
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