Google Git
Sign in
apache / ignite-website / 2d9515dffbec7a1250be259785bd7cdae37d8520 / . / releases / 1.7.0 / javadoc / org / apache / ignite / lang / IgniteAsyncCallback.html
blob: 9323a9a20f01ffe55c4ba66ca26015bf4c0dede5 [file] [log] [blame]
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<!-- NewPage -->
<html lang="en">
<head>
<META NAME="ROBOTS" CONTENT="NOINDEX">
<link rel="canonical" href="https://ignite.apache.org/releases/1.7.0/javadoc/org/apache/ignite/lang/IgniteAsyncCallback.html" />
<!-- Generated by javadoc (version 1.7.0_80) on Mon Aug 01 20:32:32 MSK 2016 -->
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>IgniteAsyncCallback (Ignite 1.7.0)</title>
<meta name="date" content="2016-08-01">
<link rel="stylesheet" type="text/css" href="../../../../javadoc.css" title="Style">
<script>
(function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
(i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
})(window,document,'script','https://www.google-analytics.com/analytics.js','ga');
ga('create', 'UA-61232409-1', 'auto');
ga('send', 'pageview');
</script></head>
<body>
<script type="text/javascript"><!--
if (location.href.indexOf('is-external=true') == -1) {
parent.document.title="IgniteAsyncCallback (Ignite 1.7.0)";
}
//-->
</script>
<noscript>
<div>JavaScript is disabled on your browser.</div>
</noscript>
<!-- ========= START OF TOP NAVBAR ======= -->
<div class="topNav"><a name="navbar_top">
<!-- -->
</a><a href="#skip-navbar_top" title="Skip navigation links"></a><a name="navbar_top_firstrow">
<!-- -->
</a>
<ul class="navList" title="Navigation">
<li><a href="../../../../overview-summary.html">Overview</a></li>
<li><a href="package-summary.html">Package</a></li>
<li class="navBarCell1Rev">Class</li>
<li><a href="class-use/IgniteAsyncCallback.html">Use</a></li>
<li><a href="package-tree.html">Tree</a></li>
<li><a href="../../../../deprecated-list.html">Deprecated</a></li>
<li><a href="../../../../index-all.html">Index</a></li>
<li><a href="../../../../help-doc.html">Help</a></li>
</ul>
<div class="aboutLanguage"><em>Ignite - In-Memory Data Fabric</em></div>
</div>
<div class="subNav">
<ul class="navList">
<li>Prev Class</li>
<li><a href="../../../../org/apache/ignite/lang/IgniteAsyncSupport.html" title="interface in org.apache.ignite.lang"><span class="strong">Next Class</span></a></li>
</ul>
<ul class="navList">
<li><a href="../../../../index.html?org/apache/ignite/lang/IgniteAsyncCallback.html" target="_top">Frames</a></li>
<li><a href="IgniteAsyncCallback.html" target="_top">No Frames</a></li>
</ul>
<ul class="navList" id="allclasses_navbar_top">
<li><a href="../../../../allclasses-noframe.html">All Classes</a></li>
</ul>
<div>
<script type="text/javascript"><!--
allClassesLink = document.getElementById("allclasses_navbar_top");
if(window==top) {
allClassesLink.style.display = "block";
}
else {
allClassesLink.style.display = "none";
}
//-->
</script>
</div>
<div>
<ul class="subNavList">
<li>Summary:&nbsp;</li>
<li>Required&nbsp;|&nbsp;</li>
<li>Optional</li>
</ul>
<ul class="subNavList">
<li>Detail:&nbsp;</li>
<li>Element</li>
</ul>
</div>
<a name="skip-navbar_top">
<!-- -->
</a></div>
<!-- ========= END OF TOP NAVBAR ========= -->
<!-- ======== START OF CLASS DATA ======== -->
<div class="header">
<div class="subTitle">org.apache.ignite.lang</div>
<h2 title="Annotation Type IgniteAsyncCallback" class="title">Annotation Type IgniteAsyncCallback</h2>
</div>
<div class="contentContainer">
<div class="description">
<ul class="blockList">
<li class="blockList">
<hr>
<br>
<pre><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/annotation/Retention.html?is-external=true" title="class or interface in java.lang.annotation">@Retention</a>(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/annotation/Retention.html?is-external=true#value()" title="class or interface in java.lang.annotation">value</a>=<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/annotation/RetentionPolicy.html?is-external=true#RUNTIME" title="class or interface in java.lang.annotation">RUNTIME</a>)
<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/annotation/Target.html?is-external=true" title="class or interface in java.lang.annotation">@Target</a>(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/annotation/Target.html?is-external=true#value()" title="class or interface in java.lang.annotation">value</a>=<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/annotation/ElementType.html?is-external=true#TYPE" title="class or interface in java.lang.annotation">TYPE</a>)
public @interface <span class="strong">IgniteAsyncCallback</span></pre>
<div class="block">If callback has this annotation then it will be executing in another thread.
<p>
Currently this annotation is supported for:
<ol>
<li><a href="../../../../org/apache/ignite/cache/query/ContinuousQuery.html" title="class in org.apache.ignite.cache.query"><code>ContinuousQuery</code></a> - <code>CacheEntryUpdatedListener</code> and <code>CacheEntryEventFilter</code>.</li>
</ol>
<p>
For example, if <code>filter</code> or <code>CacheEntryListener</code>
has the annotation then callbacks will be executing to asyncCallback thread pool. It allows to use cache API
in a callbacks. This thread pool can be configured by <a href="../../../../org/apache/ignite/configuration/IgniteConfiguration.html#setAsyncCallbackPoolSize(int)"><code>IgniteConfiguration.setAsyncCallbackPoolSize(int)</code></a>.
<h1 class="header">Example</h1>
As an example, suppose we have cache with <code>'Person'</code> objects and we need
to query all persons with salary above then 1000. Also remote filter will update some entries.
<p>
Here is the <code>Person</code> class:
<pre name="code" class="java">
public class Person {
// Name.
private String name;
// Salary.
private double salary;
...
}
</pre>
<p>
Here is the <code>ExampleCacheEntryFilter</code> class:
<pre name="code" class="java">
&#064;IgniteAsyncCallback
public class ExampleCacheEntryFilter implements CacheEntryEventFilter&lt;Integer, Person&gt; {
&#064;IgniteInstanceResource
private Ignite ignite;
// Continuous listener will be notified for persons with salary above 1000.
// Filter increases salary for some person on 100. Without &#064;IgniteAsyncCallback annotation
// this operation is not safe.
public boolean evaluate(CacheEntryEvent&lt;? extends K, ? extends V&gt; evt) throws CacheEntryListenerException {
Person p = evt.getValue();
if (p.getSalary() &gt; 1000)
return true;
ignite.cache("Person").put(evt.getKey(), new Person(p.getName(), p.getSalary() + 100));
return false;
}
}
</pre>
<p>
Query with asynchronous callback execute as usually:
<pre name="code" class="java">
// Create new continuous query.
ContinuousQuery&lt;Long, Person&gt; qry = new ContinuousQuery&lt;&gt;();
// Callback that is called locally when update notifications are received.
// It simply prints out information about all created persons.
qry.setLocalListener((evts) -> {
for (CacheEntryEvent&lt;? extends Long, ? extends Person&gt; e : evts) {
Person p = e.getValue();
System.out.println(p.getFirstName() + " " + p.getLastName() + "'s salary is " + p.getSalary());
}
});
// Sets remote filter.
qry.setRemoteFilterFactory(() -> new ExampleCacheEntryFilter());
// Execute query.
QueryCursor&lt;Cache.Entry&lt;Long, Person&gt;&gt; cur = cache.query(qry);
</pre></div>
<dl><dt><span class="strong">See Also:</span></dt><dd><a href="../../../../org/apache/ignite/configuration/IgniteConfiguration.html#getAsyncCallbackPoolSize()"><code>IgniteConfiguration.getAsyncCallbackPoolSize()</code></a>,
<a href="../../../../org/apache/ignite/cache/query/ContinuousQuery.html#getRemoteFilterFactory()"><code>ContinuousQuery.getRemoteFilterFactory()</code></a>,
<a href="../../../../org/apache/ignite/cache/query/ContinuousQuery.html#getLocalListener()"><code>ContinuousQuery.getLocalListener()</code></a></dd></dl>
</li>
</ul>
</div>
</div>
<!-- ========= END OF CLASS DATA ========= -->
<!-- ======= START OF BOTTOM NAVBAR ====== -->
<div class="bottomNav"><a name="navbar_bottom">
<!-- -->
</a><a href="#skip-navbar_bottom" title="Skip navigation links"></a><a name="navbar_bottom_firstrow">
<!-- -->
</a>
<ul class="navList" title="Navigation">
<li><a href="../../../../overview-summary.html">Overview</a></li>
<li><a href="package-summary.html">Package</a></li>
<li class="navBarCell1Rev">Class</li>
<li><a href="class-use/IgniteAsyncCallback.html">Use</a></li>
<li><a href="package-tree.html">Tree</a></li>
<li><a href="../../../../deprecated-list.html">Deprecated</a></li>
<li><a href="../../../../index-all.html">Index</a></li>
<li><a href="../../../../help-doc.html">Help</a></li>
</ul>
<div class="aboutLanguage"><em>Ignite - In-Memory Data Fabric</em></div>
</div>
<div class="subNav">
<ul class="navList">
<li>Prev Class</li>
<li><a href="../../../../org/apache/ignite/lang/IgniteAsyncSupport.html" title="interface in org.apache.ignite.lang"><span class="strong">Next Class</span></a></li>
</ul>
<ul class="navList">
<li><a href="../../../../index.html?org/apache/ignite/lang/IgniteAsyncCallback.html" target="_top">Frames</a></li>
<li><a href="IgniteAsyncCallback.html" target="_top">No Frames</a></li>
</ul>
<ul class="navList" id="allclasses_navbar_bottom">
<li><a href="../../../../allclasses-noframe.html">All Classes</a></li>
</ul>
<div>
<script type="text/javascript"><!--
allClassesLink = document.getElementById("allclasses_navbar_bottom");
if(window==top) {
allClassesLink.style.display = "block";
}
else {
allClassesLink.style.display = "none";
}
//-->
</script>
</div>
<div>
<ul class="subNavList">
<li>Summary:&nbsp;</li>
<li>Required&nbsp;|&nbsp;</li>
<li>Optional</li>
</ul>
<ul class="subNavList">
<li>Detail:&nbsp;</li>
<li>Element</li>
</ul>
</div>
<a name="skip-navbar_bottom">
<!-- -->
</a></div>
<!-- ======== END OF BOTTOM NAVBAR ======= -->
<p class="legalCopy"><small><table width="100%" border="0" cellspacing=0 cellpadding=0 style="padding: 5px"> <tr> <td> <table style="padding-left: 0; margin: 0"> <tbody style="padding: 0; margin: 0"> <tr style="padding: 0; margin: 0"> <td> <a target=_blank href="https://ignite.apache.org"><nobr>2015 Copyright &#169; Apache Software Foundation</nobr></a> </td> </tr> </tbody> </table> </td> <td width="100%" align="right" valign="center"> <a href="https://twitter.com/ApacheIgnite" class="twitter-follow-button" data-show-count="false" data-size="large">Follow @ApacheIgnite</a> <script>!function(d,s,id){var js,fjs=d.getElementsByTagName(s)[0],p=/^http:/.test(d.location)?'http':'https';if(!d.getElementById(id)){js=d.createElement(s);js.id=id;js.src=p+'://platform.twitter.com/widgets.js';fjs.parentNode.insertBefore(js,fjs);}}(document, 'script', 'twitter-wjs');</script> </td> </tr> <tr> <td colspan="2" valign="top" align="left"> <table style="padding-left: 0; margin: 0"> <tbody style="padding: 0; margin: 0"> <tr style="padding: 0; margin: 0"> <td> <b>Ignite Fabric</b> </td> <td>:&nbsp;&nbsp; ver. <strong>1.7.0</strong> </td> </tr> <tr style="padding: 0; margin: 0"> <td> <b>Release Date</b> </td> <td>:&nbsp;&nbsp; August 1 2016 </td> </tr> </tbody> </table> </td> </tr> </table></small></p>
</body>
</html>