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<div class="subTitle">org.apache.ignite</div>
<h2 title="Interface IgniteMessaging" class="title">Interface IgniteMessaging</h2>
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<dt>All Superinterfaces:</dt>
<dd><a href="../../../org/apache/ignite/lang/IgniteAsyncSupport.html" title="interface in org.apache.ignite.lang">IgniteAsyncSupport</a></dd>
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<pre>public interface <span class="strong">IgniteMessaging</span>
extends <a href="../../../org/apache/ignite/lang/IgniteAsyncSupport.html" title="interface in org.apache.ignite.lang">IgniteAsyncSupport</a></pre>
<div class="block">Provides functionality for topic-based message exchange among nodes defined by <a href="../../../org/apache/ignite/IgniteMessaging.html#clusterGroup()"><code>clusterGroup()</code></a>.
Users can send ordered and unordered messages to various topics. Note that same topic name
cannot be reused between ordered and unordered messages.
<p>
Instance of <code>IgniteMessaging</code> is obtained from <a href="../../../org/apache/ignite/Ignite.html" title="interface in org.apache.ignite"><code>Ignite</code></a> as follows:
<pre class="brush:java">
Ignite ignite = Ignition.ignite();
// Messaging instance spanning all cluster nodes.
IgniteMessaging m = ignite.message();
</pre>
You can also obtain an instance of messaging facade over a specific cluster group:
<pre class="brush:java">
// Cluster group over remote nodes (excluding the local node).
ClusterGroup remoteNodes = ignite.cluster().forRemotes();
// Messaging instance spanning all remote cluster nodes.
IgniteMessaging m = ignite.message(remoteNodes);
</pre>
<p>
There are <code>2</code> ways to subscribe to message listening, <code>local</code> and <code>remote</code>.
<p>
Local subscription, defined by <a href="../../../org/apache/ignite/IgniteMessaging.html#localListen(java.lang.Object, org.apache.ignite.lang.IgniteBiPredicate)"><code>localListen(Object, IgniteBiPredicate)</code></a> method, will add
a listener for a given topic on local node only. This listener will be notified whenever any
node within the underlying cluster group will send a message for a given topic to this node. Local listen
subscription will happen regardless of whether the local node belongs to this cluster group or not.
<p>
Remote subscription, defined by <a href="../../../org/apache/ignite/IgniteMessaging.html#remoteListen(java.lang.Object, org.apache.ignite.lang.IgniteBiPredicate)"><code>remoteListen(Object, IgniteBiPredicate)</code></a>, will add a
message listener for a given topic to all nodes in the underlying cluster group (possibly including this node if
it belongs to the cluster group as well). This means that any node within this cluster group can send
a message for a given topic and all nodes within the cluster group will receive listener notifications.
<h1 class="header">Ordered vs Unordered</h1>
Ignite allows for sending ordered messages (see <a href="../../../org/apache/ignite/IgniteMessaging.html#sendOrdered(java.lang.Object, java.lang.Object, long)"><code>sendOrdered(Object, Object, long)</code></a>), i.e.
messages will be received in the same order they were sent. Ordered messages have a <code>timeout</code>
parameter associated with them which specifies how long an out-of-order message will stay in a queue,
waiting for messages that are ordered ahead of it to arrive. If timeout expires, then all ordered
messages for a given topic that have not arrived yet will be skipped. When (and if) expired messages
actually do arrive, they will be ignored.</div>
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<h3>Method Summary</h3>
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<caption><span>Methods</span><span class="tabEnd">&nbsp;</span></caption>
<tr>
<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Method and Description</th>
</tr>
<tr class="altColor">
<td class="colFirst"><code><a href="../../../org/apache/ignite/cluster/ClusterGroup.html" title="interface in org.apache.ignite.cluster">ClusterGroup</a></code></td>
<td class="colLast"><code><strong><a href="../../../org/apache/ignite/IgniteMessaging.html#clusterGroup()">clusterGroup</a></strong>()</code>
<div class="block">Gets the cluster group to which this <code>GridMessaging</code> instance belongs.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><strong><a href="../../../org/apache/ignite/IgniteMessaging.html#localListen(java.lang.Object, org.apache.ignite.lang.IgniteBiPredicate)">localListen</a></strong>(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>&nbsp;topic,
<a href="../../../org/apache/ignite/lang/IgniteBiPredicate.html" title="interface in org.apache.ignite.lang">IgniteBiPredicate</a><span class='angle_bracket'>&lt;</span><a href="http://docs.oracle.com/javase/7/docs/api/java/util/UUID.html?is-external=true" title="class or interface in java.util">UUID</a>,?<span class='angle_bracket'>&gt;</span>&nbsp;p)</code>
<div class="block">Adds local listener for given topic on local node only.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code><a href="http://docs.oracle.com/javase/7/docs/api/java/util/UUID.html?is-external=true" title="class or interface in java.util">UUID</a></code></td>
<td class="colLast"><code><strong><a href="../../../org/apache/ignite/IgniteMessaging.html#remoteListen(java.lang.Object, org.apache.ignite.lang.IgniteBiPredicate)">remoteListen</a></strong>(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>&nbsp;topic,
<a href="../../../org/apache/ignite/lang/IgniteBiPredicate.html" title="interface in org.apache.ignite.lang">IgniteBiPredicate</a><span class='angle_bracket'>&lt;</span><a href="http://docs.oracle.com/javase/7/docs/api/java/util/UUID.html?is-external=true" title="class or interface in java.util">UUID</a>,?<span class='angle_bracket'>&gt;</span>&nbsp;p)</code>
<div class="block">Adds a message listener for a given topic to all nodes in the cluster group (possibly including
this node if it belongs to the cluster group as well).</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><strong><a href="../../../org/apache/ignite/IgniteMessaging.html#send(java.lang.Object, java.util.Collection)">send</a></strong>(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>&nbsp;topic,
<a href="http://docs.oracle.com/javase/7/docs/api/java/util/Collection.html?is-external=true" title="class or interface in java.util">Collection</a><span class='angle_bracket'>&lt;</span>?<span class='angle_bracket'>&gt;</span>&nbsp;msgs)</code>
<div class="block">Sends given messages with the specified topic to the nodes in the underlying cluster group.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><strong><a href="../../../org/apache/ignite/IgniteMessaging.html#send(java.lang.Object, java.lang.Object)">send</a></strong>(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>&nbsp;topic,
<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>&nbsp;msg)</code>
<div class="block">Sends given message with specified topic to the nodes in the underlying cluster group.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><strong><a href="../../../org/apache/ignite/IgniteMessaging.html#sendOrdered(java.lang.Object, java.lang.Object, long)">sendOrdered</a></strong>(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>&nbsp;topic,
<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>&nbsp;msg,
long&nbsp;timeout)</code>
<div class="block">Sends given message with specified topic to the nodes in the underlying cluster group.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><strong><a href="../../../org/apache/ignite/IgniteMessaging.html#stopLocalListen(java.lang.Object, org.apache.ignite.lang.IgniteBiPredicate)">stopLocalListen</a></strong>(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>&nbsp;topic,
<a href="../../../org/apache/ignite/lang/IgniteBiPredicate.html" title="interface in org.apache.ignite.lang">IgniteBiPredicate</a><span class='angle_bracket'>&lt;</span><a href="http://docs.oracle.com/javase/7/docs/api/java/util/UUID.html?is-external=true" title="class or interface in java.util">UUID</a>,?<span class='angle_bracket'>&gt;</span>&nbsp;p)</code>
<div class="block">Unregisters local listener for given topic on local node only.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><strong><a href="../../../org/apache/ignite/IgniteMessaging.html#stopRemoteListen(java.util.UUID)">stopRemoteListen</a></strong>(<a href="http://docs.oracle.com/javase/7/docs/api/java/util/UUID.html?is-external=true" title="class or interface in java.util">UUID</a>&nbsp;opId)</code>
<div class="block">Unregisters all listeners identified with provided operation ID on all nodes in the cluster group.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code><a href="../../../org/apache/ignite/IgniteMessaging.html" title="interface in org.apache.ignite">IgniteMessaging</a></code></td>
<td class="colLast"><code><strong><a href="../../../org/apache/ignite/IgniteMessaging.html#withAsync()">withAsync</a></strong>()</code>
<div class="block">Gets instance of this component with asynchronous mode enabled.</div>
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<h3>Methods inherited from interface&nbsp;org.apache.ignite.lang.<a href="../../../org/apache/ignite/lang/IgniteAsyncSupport.html" title="interface in org.apache.ignite.lang">IgniteAsyncSupport</a></h3>
<code><a href="../../../org/apache/ignite/lang/IgniteAsyncSupport.html#future()">future</a>, <a href="../../../org/apache/ignite/lang/IgniteAsyncSupport.html#isAsync()">isAsync</a></code></li>
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<h3>Method Detail</h3>
<a name="clusterGroup()">
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<h4>clusterGroup</h4>
<pre><a href="../../../org/apache/ignite/cluster/ClusterGroup.html" title="interface in org.apache.ignite.cluster">ClusterGroup</a>&nbsp;clusterGroup()</pre>
<div class="block">Gets the cluster group to which this <code>GridMessaging</code> instance belongs.</div>
<dl><dt><span class="strong">Returns:</span></dt><dd>Cluster group to which this <code>GridMessaging</code> instance belongs.</dd></dl>
</li>
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<h4>send</h4>
<pre>void&nbsp;send(@Nullable
<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>&nbsp;topic,
<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>&nbsp;msg)
throws <a href="../../../org/apache/ignite/IgniteException.html" title="class in org.apache.ignite">IgniteException</a></pre>
<div class="block">Sends given message with specified topic to the nodes in the underlying cluster group.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>topic</code> - Topic to send to, <code>null</code> for default topic.</dd><dd><code>msg</code> - Message to send.</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code><a href="../../../org/apache/ignite/IgniteException.html" title="class in org.apache.ignite">IgniteException</a></code> - If failed to send a message to any of the nodes.</dd>
<dd><code><a href="../../../org/apache/ignite/cluster/ClusterGroupEmptyException.html" title="class in org.apache.ignite.cluster">ClusterGroupEmptyException</a></code> - Thrown in case when cluster group is empty.</dd></dl>
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<h4>send</h4>
<pre>void&nbsp;send(@Nullable
<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>&nbsp;topic,
<a href="http://docs.oracle.com/javase/7/docs/api/java/util/Collection.html?is-external=true" title="class or interface in java.util">Collection</a><span class='angle_bracket'>&lt;</span>?<span class='angle_bracket'>&gt;</span>&nbsp;msgs)
throws <a href="../../../org/apache/ignite/IgniteException.html" title="class in org.apache.ignite">IgniteException</a></pre>
<div class="block">Sends given messages with the specified topic to the nodes in the underlying cluster group.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>topic</code> - Topic to send to, <code>null</code> for default topic.</dd><dd><code>msgs</code> - Messages to send. Order of the sending is undefined. If the method produces
the exception none or some messages could have been sent already.</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code><a href="../../../org/apache/ignite/IgniteException.html" title="class in org.apache.ignite">IgniteException</a></code> - If failed to send a message to any of the nodes.</dd>
<dd><code><a href="../../../org/apache/ignite/cluster/ClusterGroupEmptyException.html" title="class in org.apache.ignite.cluster">ClusterGroupEmptyException</a></code> - Thrown in case when cluster group is empty.</dd></dl>
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<h4>sendOrdered</h4>
<pre>void&nbsp;sendOrdered(@Nullable
<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>&nbsp;topic,
<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>&nbsp;msg,
long&nbsp;timeout)
throws <a href="../../../org/apache/ignite/IgniteException.html" title="class in org.apache.ignite">IgniteException</a></pre>
<div class="block">Sends given message with specified topic to the nodes in the underlying cluster group. Messages sent with
this method will arrive in the same order they were sent. Note that if a topic is used
for ordered messages, then it cannot be reused for non-ordered messages.
<p>
The <code>timeout</code> parameter specifies how long an out-of-order message will stay in a queue,
waiting for messages that are ordered ahead of it to arrive. If timeout expires, then all ordered
messages that have not arrived before this message will be skipped. When (and if) expired messages
actually do arrive, they will be ignored.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>topic</code> - Topic to send to, <code>null</code> for default topic.</dd><dd><code>msg</code> - Message to send.</dd><dd><code>timeout</code> - Message timeout in milliseconds, <code>0</code> for default
which is <a href="../../../org/apache/ignite/configuration/IgniteConfiguration.html#getNetworkTimeout()"><code>IgniteConfiguration.getNetworkTimeout()</code></a>.</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code><a href="../../../org/apache/ignite/IgniteException.html" title="class in org.apache.ignite">IgniteException</a></code> - If failed to send a message to any of the nodes.</dd>
<dd><code><a href="../../../org/apache/ignite/cluster/ClusterGroupEmptyException.html" title="class in org.apache.ignite.cluster">ClusterGroupEmptyException</a></code> - Thrown in case when cluster group is empty.</dd></dl>
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<h4>localListen</h4>
<pre>void&nbsp;localListen(@Nullable
<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>&nbsp;topic,
<a href="../../../org/apache/ignite/lang/IgniteBiPredicate.html" title="interface in org.apache.ignite.lang">IgniteBiPredicate</a><span class='angle_bracket'>&lt;</span><a href="http://docs.oracle.com/javase/7/docs/api/java/util/UUID.html?is-external=true" title="class or interface in java.util">UUID</a>,?<span class='angle_bracket'>&gt;</span>&nbsp;p)</pre>
<div class="block">Adds local listener for given topic on local node only. This listener will be notified whenever any
node within the cluster group will send a message for a given topic to this node. Local listen
subscription will happen regardless of whether local node belongs to this cluster group or not.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>topic</code> - Topic to subscribe to.</dd><dd><code>p</code> - Predicate that is called on each received message. If predicate returns <code>false</code>,
then it will be unsubscribed from any further notifications.</dd></dl>
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<h4>stopLocalListen</h4>
<pre>void&nbsp;stopLocalListen(@Nullable
<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>&nbsp;topic,
<a href="../../../org/apache/ignite/lang/IgniteBiPredicate.html" title="interface in org.apache.ignite.lang">IgniteBiPredicate</a><span class='angle_bracket'>&lt;</span><a href="http://docs.oracle.com/javase/7/docs/api/java/util/UUID.html?is-external=true" title="class or interface in java.util">UUID</a>,?<span class='angle_bracket'>&gt;</span>&nbsp;p)</pre>
<div class="block">Unregisters local listener for given topic on local node only.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>topic</code> - Topic to unsubscribe from.</dd><dd><code>p</code> - Listener predicate.</dd></dl>
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<h4>remoteListen</h4>
<pre><a href="../../../org/apache/ignite/lang/IgniteAsyncSupported.html" title="annotation in org.apache.ignite.lang">@IgniteAsyncSupported</a>
<a href="http://docs.oracle.com/javase/7/docs/api/java/util/UUID.html?is-external=true" title="class or interface in java.util">UUID</a>&nbsp;remoteListen(@Nullable
<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>&nbsp;topic,
<a href="../../../org/apache/ignite/lang/IgniteBiPredicate.html" title="interface in org.apache.ignite.lang">IgniteBiPredicate</a><span class='angle_bracket'>&lt;</span><a href="http://docs.oracle.com/javase/7/docs/api/java/util/UUID.html?is-external=true" title="class or interface in java.util">UUID</a>,?<span class='angle_bracket'>&gt;</span>&nbsp;p)
throws <a href="../../../org/apache/ignite/IgniteException.html" title="class in org.apache.ignite">IgniteException</a></pre>
<div class="block">Adds a message listener for a given topic to all nodes in the cluster group (possibly including
this node if it belongs to the cluster group as well). This means that any node within this cluster
group can send a message for a given topic and all nodes within the cluster group will receive
listener notifications.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>topic</code> - Topic to subscribe to, <code>null</code> means default topic.</dd><dd><code>p</code> - Predicate that is called on each node for each received message. If predicate returns <code>false</code>,
then it will be unsubscribed from any further notifications.</dd>
<dt><span class="strong">Returns:</span></dt><dd><code>Operation ID</code> that can be passed to <a href="../../../org/apache/ignite/IgniteMessaging.html#stopRemoteListen(java.util.UUID)"><code>stopRemoteListen(UUID)</code></a> method to stop listening.</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code><a href="../../../org/apache/ignite/IgniteException.html" title="class in org.apache.ignite">IgniteException</a></code> - If failed to add listener.</dd></dl>
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<h4>stopRemoteListen</h4>
<pre><a href="../../../org/apache/ignite/lang/IgniteAsyncSupported.html" title="annotation in org.apache.ignite.lang">@IgniteAsyncSupported</a>
void&nbsp;stopRemoteListen(<a href="http://docs.oracle.com/javase/7/docs/api/java/util/UUID.html?is-external=true" title="class or interface in java.util">UUID</a>&nbsp;opId)
throws <a href="../../../org/apache/ignite/IgniteException.html" title="class in org.apache.ignite">IgniteException</a></pre>
<div class="block">Unregisters all listeners identified with provided operation ID on all nodes in the cluster group.
<p>
Supports asynchronous execution (see <a href="../../../org/apache/ignite/lang/IgniteAsyncSupport.html" title="interface in org.apache.ignite.lang"><code>IgniteAsyncSupport</code></a>).</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>opId</code> - Listen ID that was returned from <a href="../../../org/apache/ignite/IgniteMessaging.html#remoteListen(java.lang.Object, org.apache.ignite.lang.IgniteBiPredicate)"><code>remoteListen(Object, IgniteBiPredicate)</code></a> method.</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code><a href="../../../org/apache/ignite/IgniteException.html" title="class in org.apache.ignite">IgniteException</a></code> - If failed to unregister listeners.</dd></dl>
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<h4>withAsync</h4>
<pre><a href="../../../org/apache/ignite/IgniteMessaging.html" title="interface in org.apache.ignite">IgniteMessaging</a>&nbsp;withAsync()</pre>
<div class="block">Gets instance of this component with asynchronous mode enabled.</div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../org/apache/ignite/lang/IgniteAsyncSupport.html#withAsync()">withAsync</a></code>&nbsp;in interface&nbsp;<code><a href="../../../org/apache/ignite/lang/IgniteAsyncSupport.html" title="interface in org.apache.ignite.lang">IgniteAsyncSupport</a></code></dd>
<dt><span class="strong">Returns:</span></dt><dd>Instance of this component with asynchronous mode enabled.</dd></dl>
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<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://incubator.apache.org/projects/ignite.html"><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>1.1.0-incubating</strong> </td> </tr> <tr style="padding: 0; margin: 0"> <td> <b>Release Date</b> </td> <td>:&nbsp;&nbsp; May 20 2015 </td> </tr> </tbody> </table> </td> </tr> </table></small></p>
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