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+<h2 title="Interface KafkaClient" class="title">Interface KafkaClient</h2>
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+<dt>All Known Subinterfaces:</dt>
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title="interface in org.apache.twill.kafka.client">KafkaClientService</a></dd>
+</dl>
+<hr>
+<br>
+<pre>public interface <span class="strong">KafkaClient</span></pre>
+<div class="block">Represents a kafka client that can publish/subscribe to a 
Kafka server cluster.</div>
+</li>
+</ul>
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+<!-- ========== METHOD SUMMARY =========== -->
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+<table class="overviewSummary" border="0" cellpadding="3" cellspacing="0" 
summary="Method Summary table, listing methods, and an explanation">
+<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/twill/kafka/client/KafkaConsumer.html" 
title="interface in org.apache.twill.kafka.client">KafkaConsumer</a></code></td>
+<td class="colLast"><code><strong><a 
href="../../../../../org/apache/twill/kafka/client/KafkaClient.html#getConsumer()">getConsumer</a></strong>()</code>
+<div class="block">Creates a <a 
href="../../../../../org/apache/twill/kafka/client/KafkaConsumer.html" 
title="interface in 
org.apache.twill.kafka.client"><code>KafkaConsumer</code></a> for consuming 
messages.</div>
+</td>
+</tr>
+<tr class="rowColor">
+<td class="colFirst"><code><a 
href="../../../../../org/apache/twill/kafka/client/KafkaPublisher.html" 
title="interface in 
org.apache.twill.kafka.client">KafkaPublisher</a></code></td>
+<td class="colLast"><code><strong><a 
href="../../../../../org/apache/twill/kafka/client/KafkaClient.html#getPublisher(org.apache.twill.kafka.client.KafkaPublisher.Ack,%20org.apache.twill.kafka.client.Compression)">getPublisher</a></strong>(<a
 href="../../../../../org/apache/twill/kafka/client/KafkaPublisher.Ack.html" 
title="enum in org.apache.twill.kafka.client">KafkaPublisher.Ack</a>&nbsp;ack,
+            <a 
href="../../../../../org/apache/twill/kafka/client/Compression.html" 
title="enum in 
org.apache.twill.kafka.client">Compression</a>&nbsp;compression)</code>
+<div class="block">Creates a <a 
href="../../../../../org/apache/twill/kafka/client/KafkaPublisher.html" 
title="interface in 
org.apache.twill.kafka.client"><code>KafkaPublisher</code></a> that is ready 
for publish.</div>
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org.apache.twill.kafka.client.Compression)">
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+<h4>getPublisher</h4>
+<pre><a 
href="../../../../../org/apache/twill/kafka/client/KafkaPublisher.html" 
title="interface in 
org.apache.twill.kafka.client">KafkaPublisher</a>&nbsp;getPublisher(<a 
href="../../../../../org/apache/twill/kafka/client/KafkaPublisher.Ack.html" 
title="enum in org.apache.twill.kafka.client">KafkaPublisher.Ack</a>&nbsp;ack,
+                          <a 
href="../../../../../org/apache/twill/kafka/client/Compression.html" 
title="enum in 
org.apache.twill.kafka.client">Compression</a>&nbsp;compression)</pre>
+<div class="block">Creates a <a 
href="../../../../../org/apache/twill/kafka/client/KafkaPublisher.html" 
title="interface in 
org.apache.twill.kafka.client"><code>KafkaPublisher</code></a> that is ready 
for publish.</div>
+<dl><dt><span class="strong">Parameters:</span></dt><dd><code>ack</code> - 
Type of ack that the publisher would use for all it's 
publish.</dd><dd><code>compression</code> - The compression type for messages 
published through the returned publisher.</dd>
+<dt><span class="strong">Returns:</span></dt><dd>A <a 
href="../../../../../org/apache/twill/kafka/client/KafkaPublisher.html" 
title="interface in 
org.apache.twill.kafka.client"><code>KafkaPublisher</code></a>.</dd></dl>
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title="interface in 
org.apache.twill.kafka.client">KafkaConsumer</a>&nbsp;getConsumer()</pre>
+<div class="block">Creates a <a 
href="../../../../../org/apache/twill/kafka/client/KafkaConsumer.html" 
title="interface in 
org.apache.twill.kafka.client"><code>KafkaConsumer</code></a> for consuming 
messages.</div>
+<dl><dt><span class="strong">Returns:</span></dt><dd>A <a 
href="../../../../../org/apache/twill/kafka/client/KafkaConsumer.html" 
title="interface in 
org.apache.twill.kafka.client"><code>KafkaConsumer</code></a>.</dd></dl>
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+<div class="subTitle">org.apache.twill.kafka.client</div>
+<h2 title="Interface KafkaClientService" class="title">Interface 
KafkaClientService</h2>
+</div>
+<div class="contentContainer">
+<div class="description">
+<ul class="blockList">
+<li class="blockList">
+<dl>
+<dt>All Superinterfaces:</dt>
+<dd><a href="../../../../../org/apache/twill/kafka/client/KafkaClient.html" 
title="interface in org.apache.twill.kafka.client">KafkaClient</a>, 
com.google.common.util.concurrent.Service</dd>
+</dl>
+<hr>
+<br>
+<pre>public interface <span class="strong">KafkaClientService</span>
+extends <a 
href="../../../../../org/apache/twill/kafka/client/KafkaClient.html" 
title="interface in org.apache.twill.kafka.client">KafkaClient</a>, 
com.google.common.util.concurrent.Service</pre>
+<div class="block">A <a 
href="../../../../../org/apache/twill/kafka/client/KafkaClient.html" 
title="interface in org.apache.twill.kafka.client"><code>KafkaClient</code></a> 
that extends <code>Service</code> to provide lifecycle management.</div>
+</li>
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+<h3>Nested classes/interfaces inherited from 
interface&nbsp;com.google.common.util.concurrent.Service</h3>
+<code>com.google.common.util.concurrent.Service.Listener, 
com.google.common.util.concurrent.Service.State</code></li>
+</ul>
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+<h3>Methods inherited from interface&nbsp;org.apache.twill.kafka.client.<a 
href="../../../../../org/apache/twill/kafka/client/KafkaClient.html" 
title="interface in org.apache.twill.kafka.client">KafkaClient</a></h3>
+<code><a 
href="../../../../../org/apache/twill/kafka/client/KafkaClient.html#getConsumer()">getConsumer</a>,
 <a 
href="../../../../../org/apache/twill/kafka/client/KafkaClient.html#getPublisher(org.apache.twill.kafka.client.KafkaPublisher.Ack,%20org.apache.twill.kafka.client.Compression)">getPublisher</a></code></li>
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+<h3>Methods inherited from 
interface&nbsp;com.google.common.util.concurrent.Service</h3>
+<code>addListener, awaitRunning, awaitRunning, awaitTerminated, 
awaitTerminated, failureCause, isRunning, start, startAndWait, startAsync, 
state, stop, stopAndWait, stopAsync</code></li>
+</ul>
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+<div class="subTitle">org.apache.twill.kafka.client</div>
+<h2 title="Interface KafkaConsumer.MessageCallback" class="title">Interface 
KafkaConsumer.MessageCallback</h2>
+</div>
+<div class="contentContainer">
+<div class="description">
+<ul class="blockList">
+<li class="blockList">
+<dl>
+<dt>Enclosing interface:</dt>
+<dd><a href="../../../../../org/apache/twill/kafka/client/KafkaConsumer.html" 
title="interface in org.apache.twill.kafka.client">KafkaConsumer</a></dd>
+</dl>
+<hr>
+<br>
+<pre>public static interface <span 
class="strong">KafkaConsumer.MessageCallback</span></pre>
+<div class="block">Callback for receiving new messages.</div>
+</li>
+</ul>
+</div>
+<div class="summary">
+<ul class="blockList">
+<li class="blockList">
+<!-- ========== METHOD SUMMARY =========== -->
+<ul class="blockList">
+<li class="blockList"><a name="method_summary">
+<!--   -->
+</a>
+<h3>Method Summary</h3>
+<table class="overviewSummary" border="0" cellpadding="3" cellspacing="0" 
summary="Method Summary table, listing methods, and an explanation">
+<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>void</code></td>
+<td class="colLast"><code><strong><a 
href="../../../../../org/apache/twill/kafka/client/KafkaConsumer.MessageCallback.html#finished()">finished</a></strong>()</code>
+<div class="block">Invoked when message consumption is stopped.</div>
+</td>
+</tr>
+<tr class="rowColor">
+<td class="colFirst"><code>long</code></td>
+<td class="colLast"><code><strong><a 
href="../../../../../org/apache/twill/kafka/client/KafkaConsumer.MessageCallback.html#onReceived(java.util.Iterator)">onReceived</a></strong>(<a
 
href="http://docs.oracle.com/javase/7/docs/api/java/util/Iterator.html?is-external=true";
 title="class or interface in java.util">Iterator</a>&lt;<a 
href="../../../../../org/apache/twill/kafka/client/FetchedMessage.html" 
title="interface in 
org.apache.twill.kafka.client">FetchedMessage</a>&gt;&nbsp;messages)</code>
+<div class="block">Invoked when new messages is available.</div>
+</td>
+</tr>
+</table>
+</li>
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+</li>
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+</a>
+<ul class="blockList">
+<li class="blockList">
+<h4>onReceived</h4>
+<pre>long&nbsp;onReceived(<a 
href="http://docs.oracle.com/javase/7/docs/api/java/util/Iterator.html?is-external=true";
 title="class or interface in java.util">Iterator</a>&lt;<a 
href="../../../../../org/apache/twill/kafka/client/FetchedMessage.html" 
title="interface in 
org.apache.twill.kafka.client">FetchedMessage</a>&gt;&nbsp;messages)</pre>
+<div class="block">Invoked when new messages is available.</div>
+<dl><dt><span class="strong">Parameters:</span></dt><dd><code>messages</code> 
- Iterator of new messages. The <a 
href="../../../../../org/apache/twill/kafka/client/FetchedMessage.html" 
title="interface in 
org.apache.twill.kafka.client"><code>FetchedMessage</code></a> instance maybe 
reused in the Iterator
+                 and across different invocation.</dd>
+<dt><span class="strong">Returns:</span></dt><dd>The offset of the message to 
be fetched next.</dd></dl>
+</li>
+</ul>
+<a name="finished()">
+<!--   -->
+</a>
+<ul class="blockListLast">
+<li class="blockList">
+<h4>finished</h4>
+<pre>void&nbsp;finished()</pre>
+<div class="block">Invoked when message consumption is stopped. When this 
method is invoked,
+ no more <a 
href="../../../../../org/apache/twill/kafka/client/KafkaConsumer.MessageCallback.html#onReceived(java.util.Iterator)"><code>onReceived(java.util.Iterator)</code></a>
 will get triggered.</div>
+</li>
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@@ -0,0 +1,281 @@
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" 
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+<div class="subTitle">org.apache.twill.kafka.client</div>
+<h2 title="Interface KafkaConsumer.Preparer" class="title">Interface 
KafkaConsumer.Preparer</h2>
+</div>
+<div class="contentContainer">
+<div class="description">
+<ul class="blockList">
+<li class="blockList">
+<dl>
+<dt>Enclosing interface:</dt>
+<dd><a href="../../../../../org/apache/twill/kafka/client/KafkaConsumer.html" 
title="interface in org.apache.twill.kafka.client">KafkaConsumer</a></dd>
+</dl>
+<hr>
+<br>
+<pre>public static interface <span 
class="strong">KafkaConsumer.Preparer</span></pre>
+<div class="block">A builder for preparing message consumption.</div>
+</li>
+</ul>
+</div>
+<div class="summary">
+<ul class="blockList">
+<li class="blockList">
+<!-- ========== METHOD SUMMARY =========== -->
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+<h3>Method Summary</h3>
+<table class="overviewSummary" border="0" cellpadding="3" cellspacing="0" 
summary="Method Summary table, listing methods, and an explanation">
+<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/twill/kafka/client/KafkaConsumer.Preparer.html" 
title="interface in 
org.apache.twill.kafka.client">KafkaConsumer.Preparer</a></code></td>
+<td class="colLast"><code><strong><a 
href="../../../../../org/apache/twill/kafka/client/KafkaConsumer.Preparer.html#add(java.lang.String,%20int,%20long)">add</a></strong>(<a
 
href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true";
 title="class or interface in java.lang">String</a>&nbsp;topic,
+   int&nbsp;partition,
+   long&nbsp;offset)</code>
+<div class="block">Consumes messages from a given offset.</div>
+</td>
+</tr>
+<tr class="rowColor">
+<td class="colFirst"><code><a 
href="../../../../../org/apache/twill/kafka/client/KafkaConsumer.Preparer.html" 
title="interface in 
org.apache.twill.kafka.client">KafkaConsumer.Preparer</a></code></td>
+<td class="colLast"><code><strong><a 
href="../../../../../org/apache/twill/kafka/client/KafkaConsumer.Preparer.html#addFromBeginning(java.lang.String,%20int)">addFromBeginning</a></strong>(<a
 
href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true";
 title="class or interface in java.lang">String</a>&nbsp;topic,
+                int&nbsp;partition)</code>
+<div class="block">Consumes messages from the earliest message available.</div>
+</td>
+</tr>
+<tr class="altColor">
+<td class="colFirst"><code><a 
href="../../../../../org/apache/twill/kafka/client/KafkaConsumer.Preparer.html" 
title="interface in 
org.apache.twill.kafka.client">KafkaConsumer.Preparer</a></code></td>
+<td class="colLast"><code><strong><a 
href="../../../../../org/apache/twill/kafka/client/KafkaConsumer.Preparer.html#addLatest(java.lang.String,%20int)">addLatest</a></strong>(<a
 
href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true";
 title="class or interface in java.lang">String</a>&nbsp;topic,
+         int&nbsp;partition)</code>
+<div class="block">Consumes messages from the latest message.</div>
+</td>
+</tr>
+<tr class="rowColor">
+<td class="colFirst"><code><a 
href="../../../../../org/apache/twill/common/Cancellable.html" title="interface 
in org.apache.twill.common">Cancellable</a></code></td>
+<td class="colLast"><code><strong><a 
href="../../../../../org/apache/twill/kafka/client/KafkaConsumer.Preparer.html#consume(org.apache.twill.kafka.client.KafkaConsumer.MessageCallback)">consume</a></strong>(<a
 
href="../../../../../org/apache/twill/kafka/client/KafkaConsumer.MessageCallback.html"
 title="interface in 
org.apache.twill.kafka.client">KafkaConsumer.MessageCallback</a>&nbsp;callback)</code>
+<div class="block">Starts the consumption as being configured by this <a 
href="../../../../../org/apache/twill/kafka/client/KafkaConsumer.Preparer.html" 
title="interface in 
org.apache.twill.kafka.client"><code>KafkaConsumer.Preparer</code></a>.</div>
+</td>
+</tr>
+</table>
+</li>
+</ul>
+</li>
+</ul>
+</div>
+<div class="details">
+<ul class="blockList">
+<li class="blockList">
+<!-- ============ METHOD DETAIL ========== -->
+<ul class="blockList">
+<li class="blockList"><a name="method_detail">
+<!--   -->
+</a>
+<h3>Method Detail</h3>
+<a name="add(java.lang.String, int, long)">
+<!--   -->
+</a>
+<ul class="blockList">
+<li class="blockList">
+<h4>add</h4>
+<pre><a 
href="../../../../../org/apache/twill/kafka/client/KafkaConsumer.Preparer.html" 
title="interface in 
org.apache.twill.kafka.client">KafkaConsumer.Preparer</a>&nbsp;add(<a 
href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true";
 title="class or interface in java.lang">String</a>&nbsp;topic,
+                         int&nbsp;partition,
+                         long&nbsp;offset)</pre>
+<div class="block">Consumes messages from a given offset. If the given offset 
is invalid, it'll start consuming from the
+ latest offset.</div>
+<dl><dt><span class="strong">Parameters:</span></dt><dd><code>topic</code> - 
Topic to consume from.</dd><dd><code>partition</code> - Partition in the topic 
to consume from.</dd><dd><code>offset</code> - Offset to starts with.</dd>
+<dt><span class="strong">Returns:</span></dt><dd>This <a 
href="../../../../../org/apache/twill/kafka/client/KafkaConsumer.Preparer.html" 
title="interface in 
org.apache.twill.kafka.client"><code>KafkaConsumer.Preparer</code></a> 
instance.</dd></dl>
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+</ul>
+<a name="addFromBeginning(java.lang.String, int)">
+<!--   -->
+</a>
+<ul class="blockList">
+<li class="blockList">
+<h4>addFromBeginning</h4>
+<pre><a 
href="../../../../../org/apache/twill/kafka/client/KafkaConsumer.Preparer.html" 
title="interface in 
org.apache.twill.kafka.client">KafkaConsumer.Preparer</a>&nbsp;addFromBeginning(<a
 
href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true";
 title="class or interface in java.lang">String</a>&nbsp;topic,
+                                      int&nbsp;partition)</pre>
+<div class="block">Consumes messages from the earliest message available.</div>
+<dl><dt><span class="strong">Parameters:</span></dt><dd><code>topic</code> - 
Topic to consume from.</dd><dd><code>partition</code> - Partition in the topic 
to consume from.</dd>
+<dt><span class="strong">Returns:</span></dt><dd>This <a 
href="../../../../../org/apache/twill/kafka/client/KafkaConsumer.Preparer.html" 
title="interface in 
org.apache.twill.kafka.client"><code>KafkaConsumer.Preparer</code></a> 
instance.</dd></dl>
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+</ul>
+<a name="addLatest(java.lang.String, int)">
+<!--   -->
+</a>
+<ul class="blockList">
+<li class="blockList">
+<h4>addLatest</h4>
+<pre><a 
href="../../../../../org/apache/twill/kafka/client/KafkaConsumer.Preparer.html" 
title="interface in 
org.apache.twill.kafka.client">KafkaConsumer.Preparer</a>&nbsp;addLatest(<a 
href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true";
 title="class or interface in java.lang">String</a>&nbsp;topic,
+                               int&nbsp;partition)</pre>
+<div class="block">Consumes messages from the latest message.</div>
+<dl><dt><span class="strong">Parameters:</span></dt><dd><code>topic</code> - 
Topic to consume from.</dd><dd><code>partition</code> - Partition in the topic 
to consume from.</dd>
+<dt><span class="strong">Returns:</span></dt><dd>This <a 
href="../../../../../org/apache/twill/kafka/client/KafkaConsumer.Preparer.html" 
title="interface in 
org.apache.twill.kafka.client"><code>KafkaConsumer.Preparer</code></a> 
instance.</dd></dl>
+</li>
+</ul>
+<a name="consume(org.apache.twill.kafka.client.KafkaConsumer.MessageCallback)">
+<!--   -->
+</a>
+<ul class="blockListLast">
+<li class="blockList">
+<h4>consume</h4>
+<pre><a href="../../../../../org/apache/twill/common/Cancellable.html" 
title="interface in org.apache.twill.common">Cancellable</a>&nbsp;consume(<a 
href="../../../../../org/apache/twill/kafka/client/KafkaConsumer.MessageCallback.html"
 title="interface in 
org.apache.twill.kafka.client">KafkaConsumer.MessageCallback</a>&nbsp;callback)</pre>
+<div class="block">Starts the consumption as being configured by this <a 
href="../../../../../org/apache/twill/kafka/client/KafkaConsumer.Preparer.html" 
title="interface in 
org.apache.twill.kafka.client"><code>KafkaConsumer.Preparer</code></a>.</div>
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- The <a 
href="../../../../../org/apache/twill/kafka/client/KafkaConsumer.MessageCallback.html"
 title="interface in 
org.apache.twill.kafka.client"><code>KafkaConsumer.MessageCallback</code></a> 
for receiving new messages.</dd>
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href="../../../../../org/apache/twill/common/Cancellable.html" title="interface 
in org.apache.twill.common"><code>Cancellable</code></a> for cancelling message 
consumption.</dd></dl>
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+<div class="subTitle">org.apache.twill.kafka.client</div>
+<h2 title="Interface KafkaConsumer" class="title">Interface KafkaConsumer</h2>
+</div>
+<div class="contentContainer">
+<div class="description">
+<ul class="blockList">
+<li class="blockList">
+<hr>
+<br>
+<pre>public interface <span class="strong">KafkaConsumer</span></pre>
+<div class="block">A consumer for consuming (reading) messages published to a 
Kafka server cluster.</div>
+</li>
+</ul>
+</div>
+<div class="summary">
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+<!-- ======== NESTED CLASS SUMMARY ======== -->
+<ul class="blockList">
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+<h3>Nested Class Summary</h3>
+<table class="overviewSummary" border="0" cellpadding="3" cellspacing="0" 
summary="Nested Class Summary table, listing nested classes, and an 
explanation">
+<caption><span>Nested Classes</span><span 
class="tabEnd">&nbsp;</span></caption>
+<tr>
+<th class="colFirst" scope="col">Modifier and Type</th>
+<th class="colLast" scope="col">Interface and Description</th>
+</tr>
+<tr class="altColor">
+<td class="colFirst"><code>static interface&nbsp;</code></td>
+<td class="colLast"><code><strong><a 
href="../../../../../org/apache/twill/kafka/client/KafkaConsumer.MessageCallback.html"
 title="interface in 
org.apache.twill.kafka.client">KafkaConsumer.MessageCallback</a></strong></code>
+<div class="block">Callback for receiving new messages.</div>
+</td>
+</tr>
+<tr class="rowColor">
+<td class="colFirst"><code>static interface&nbsp;</code></td>
+<td class="colLast"><code><strong><a 
href="../../../../../org/apache/twill/kafka/client/KafkaConsumer.Preparer.html" 
title="interface in 
org.apache.twill.kafka.client">KafkaConsumer.Preparer</a></strong></code>
+<div class="block">A builder for preparing message consumption.</div>
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+</tr>
+</table>
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+<li class="blockList"><a name="method_summary">
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+</a>
+<h3>Method Summary</h3>
+<table class="overviewSummary" border="0" cellpadding="3" cellspacing="0" 
summary="Method Summary table, listing methods, and an explanation">
+<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/twill/kafka/client/KafkaConsumer.Preparer.html" 
title="interface in 
org.apache.twill.kafka.client">KafkaConsumer.Preparer</a></code></td>
+<td class="colLast"><code><strong><a 
href="../../../../../org/apache/twill/kafka/client/KafkaConsumer.html#prepare()">prepare</a></strong>()</code>
+<div class="block">Prepares for message consumption.</div>
+</td>
+</tr>
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+</li>
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+<ul class="blockListLast">
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+<h4>prepare</h4>
+<pre><a 
href="../../../../../org/apache/twill/kafka/client/KafkaConsumer.Preparer.html" 
title="interface in 
org.apache.twill.kafka.client">KafkaConsumer.Preparer</a>&nbsp;prepare()</pre>
+<div class="block">Prepares for message consumption.</div>
+<dl><dt><span class="strong">Returns:</span></dt><dd>A <a 
href="../../../../../org/apache/twill/kafka/client/KafkaConsumer.Preparer.html" 
title="interface in 
org.apache.twill.kafka.client"><code>KafkaConsumer.Preparer</code></a> to setup 
details about message consumption.</dd></dl>
+</li>
+</ul>
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+<div class="subTitle">org.apache.twill.kafka.client</div>
+<h2 title="Enum KafkaPublisher.Ack" class="title">Enum KafkaPublisher.Ack</h2>
+</div>
+<div class="contentContainer">
+<ul class="inheritance">
+<li><a 
href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true";
 title="class or interface in java.lang">java.lang.Object</a></li>
+<li>
+<ul class="inheritance">
+<li><a 
href="http://docs.oracle.com/javase/7/docs/api/java/lang/Enum.html?is-external=true";
 title="class or interface in java.lang">java.lang.Enum</a>&lt;<a 
href="../../../../../org/apache/twill/kafka/client/KafkaPublisher.Ack.html" 
title="enum in org.apache.twill.kafka.client">KafkaPublisher.Ack</a>&gt;</li>
+<li>
+<ul class="inheritance">
+<li>org.apache.twill.kafka.client.KafkaPublisher.Ack</li>
+</ul>
+</li>
+</ul>
+</li>
+</ul>
+<div class="description">
+<ul class="blockList">
+<li class="blockList">
+<dl>
+<dt>All Implemented Interfaces:</dt>
+<dd><a 
href="http://docs.oracle.com/javase/7/docs/api/java/io/Serializable.html?is-external=true";
 title="class or interface in java.io">Serializable</a>, <a 
href="http://docs.oracle.com/javase/7/docs/api/java/lang/Comparable.html?is-external=true";
 title="class or interface in java.lang">Comparable</a>&lt;<a 
href="../../../../../org/apache/twill/kafka/client/KafkaPublisher.Ack.html" 
title="enum in org.apache.twill.kafka.client">KafkaPublisher.Ack</a>&gt;</dd>
+</dl>
+<dl>
+<dt>Enclosing interface:</dt>
+<dd><a href="../../../../../org/apache/twill/kafka/client/KafkaPublisher.html" 
title="interface in org.apache.twill.kafka.client">KafkaPublisher</a></dd>
+</dl>
+<hr>
+<br>
+<pre>public static enum <span class="strong">KafkaPublisher.Ack</span>
+extends <a 
href="http://docs.oracle.com/javase/7/docs/api/java/lang/Enum.html?is-external=true";
 title="class or interface in java.lang">Enum</a>&lt;<a 
href="../../../../../org/apache/twill/kafka/client/KafkaPublisher.Ack.html" 
title="enum in org.apache.twill.kafka.client">KafkaPublisher.Ack</a>&gt;</pre>
+<div class="block">Represents the desired level of publish 
acknowledgment.</div>
+</li>
+</ul>
+</div>
+<div class="summary">
+<ul class="blockList">
+<li class="blockList">
+<!-- =========== ENUM CONSTANT SUMMARY =========== -->
+<ul class="blockList">
+<li class="blockList"><a name="enum_constant_summary">
+<!--   -->
+</a>
+<h3>Enum Constant Summary</h3>
+<table class="overviewSummary" border="0" cellpadding="3" cellspacing="0" 
summary="Enum Constant Summary table, listing enum constants, and an 
explanation">
+<caption><span>Enum Constants</span><span 
class="tabEnd">&nbsp;</span></caption>
+<tr>
+<th class="colOne" scope="col">Enum Constant and Description</th>
+</tr>
+<tr class="altColor">
+<td class="colOne"><code><strong><a 
href="../../../../../org/apache/twill/kafka/client/KafkaPublisher.Ack.html#ALL_RECEIVED">ALL_RECEIVED</a></strong></code>
+<div class="block">Waits for all replicas received data.</div>
+</td>
+</tr>
+<tr class="rowColor">
+<td class="colOne"><code><strong><a 
href="../../../../../org/apache/twill/kafka/client/KafkaPublisher.Ack.html#FIRE_AND_FORGET">FIRE_AND_FORGET</a></strong></code>
+<div class="block">Not wait for ack.</div>
+</td>
+</tr>
+<tr class="altColor">
+<td class="colOne"><code><strong><a 
href="../../../../../org/apache/twill/kafka/client/KafkaPublisher.Ack.html#LEADER_RECEIVED">LEADER_RECEIVED</a></strong></code>
+<div class="block">Waits for the leader received data.</div>
+</td>
+</tr>
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+<th class="colLast" scope="col">Method and Description</th>
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href="../../../../../org/apache/twill/kafka/client/KafkaPublisher.Ack.html#getAck()">getAck</a></strong>()</code>
+<div class="block">Returns the numerical ack number as understand by Kafka 
server.</div>
+</td>
+</tr>
+<tr class="rowColor">
+<td class="colFirst"><code>static <a 
href="../../../../../org/apache/twill/kafka/client/KafkaPublisher.Ack.html" 
title="enum in org.apache.twill.kafka.client">KafkaPublisher.Ack</a></code></td>
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name.</div>
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+<tr class="altColor">
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href="../../../../../org/apache/twill/kafka/client/KafkaPublisher.Ack.html" 
title="enum in 
org.apache.twill.kafka.client">KafkaPublisher.Ack</a>[]</code></td>
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href="../../../../../org/apache/twill/kafka/client/KafkaPublisher.Ack.html#values()">values</a></strong>()</code>
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+<pre>public static final&nbsp;<a 
href="../../../../../org/apache/twill/kafka/client/KafkaPublisher.Ack.html" 
title="enum in org.apache.twill.kafka.client">KafkaPublisher.Ack</a> 
FIRE_AND_FORGET</pre>
+<div class="block">Not wait for ack.</div>
+</li>
+</ul>
+<a name="LEADER_RECEIVED">
+<!--   -->
+</a>
+<ul class="blockList">
+<li class="blockList">
+<h4>LEADER_RECEIVED</h4>
+<pre>public static final&nbsp;<a 
href="../../../../../org/apache/twill/kafka/client/KafkaPublisher.Ack.html" 
title="enum in org.apache.twill.kafka.client">KafkaPublisher.Ack</a> 
LEADER_RECEIVED</pre>
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href="../../../../../org/apache/twill/kafka/client/KafkaPublisher.Ack.html" 
title="enum in org.apache.twill.kafka.client">KafkaPublisher.Ack</a> 
ALL_RECEIVED</pre>
+<div class="block">Waits for all replicas received data.</div>
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href="../../../../../org/apache/twill/kafka/client/KafkaPublisher.Ack.html" 
title="enum in 
org.apache.twill.kafka.client">KafkaPublisher.Ack</a>[]&nbsp;values()</pre>
+<div class="block">Returns an array containing the constants of this enum 
type, in
+the order they are declared.  This method may be used to iterate
+over the constants as follows:
+<pre>
+for (KafkaPublisher.Ack c : KafkaPublisher.Ack.values())
+&nbsp;   System.out.println(c);
+</pre></div>
+<dl><dt><span class="strong">Returns:</span></dt><dd>an array containing the 
constants of this enum type, in the order they are declared</dd></dl>
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href="../../../../../org/apache/twill/kafka/client/KafkaPublisher.Ack.html" 
title="enum in 
org.apache.twill.kafka.client">KafkaPublisher.Ack</a>&nbsp;valueOf(<a 
href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true";
 title="class or interface in java.lang">String</a>&nbsp;name)</pre>
+<div class="block">Returns the enum constant of this type with the specified 
name.
+The string must match <i>exactly</i> an identifier used to declare an
+enum constant in this type.  (Extraneous whitespace characters are 
+not permitted.)</div>
+<dl><dt><span class="strong">Parameters:</span></dt><dd><code>name</code> - 
the name of the enum constant to be returned.</dd>
+<dt><span class="strong">Returns:</span></dt><dd>the enum constant with the 
specified name</dd>
+<dt><span class="strong">Throws:</span></dt>
+<dd><code><a 
href="http://docs.oracle.com/javase/7/docs/api/java/lang/IllegalArgumentException.html?is-external=true";
 title="class or interface in java.lang">IllegalArgumentException</a></code> - 
if this enum type has no constant with the specified name</dd>
+<dd><code><a 
href="http://docs.oracle.com/javase/7/docs/api/java/lang/NullPointerException.html?is-external=true";
 title="class or interface in java.lang">NullPointerException</a></code> - if 
the argument is null</dd></dl>
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+<ul class="blockListLast">
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+<h4>getAck</h4>
+<pre>public&nbsp;int&nbsp;getAck()</pre>
+<div class="block">Returns the numerical ack number as understand by Kafka 
server.</div>
+</li>
+</ul>
+</li>
+</ul>
+</li>
+</ul>
+</div>
+</div>
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+<!-- ======= START OF BOTTOM NAVBAR ====== -->
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+<div class="header">
+<div class="subTitle">org.apache.twill.kafka.client</div>
+<h2 title="Interface KafkaPublisher.Preparer" class="title">Interface 
KafkaPublisher.Preparer</h2>
+</div>
+<div class="contentContainer">
+<div class="description">
+<ul class="blockList">
+<li class="blockList">
+<dl>
+<dt>Enclosing interface:</dt>
+<dd><a href="../../../../../org/apache/twill/kafka/client/KafkaPublisher.html" 
title="interface in org.apache.twill.kafka.client">KafkaPublisher</a></dd>
+</dl>
+<hr>
+<br>
+<pre>public static interface <span 
class="strong">KafkaPublisher.Preparer</span></pre>
+<div class="block">A Preparer for preparing to publish messages to a given 
topic. An instance of this class could be reused
+ to send more messages after <a 
href="../../../../../org/apache/twill/kafka/client/KafkaPublisher.Preparer.html#send()"><code>send()</code></a>
 is called.</div>
+</li>
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+<!--   -->
+</a>
+<h3>Method Summary</h3>
+<table class="overviewSummary" border="0" cellpadding="3" cellspacing="0" 
summary="Method Summary table, listing methods, and an explanation">
+<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/twill/kafka/client/KafkaPublisher.Preparer.html"
 title="interface in 
org.apache.twill.kafka.client">KafkaPublisher.Preparer</a></code></td>
+<td class="colLast"><code><strong><a 
href="../../../../../org/apache/twill/kafka/client/KafkaPublisher.Preparer.html#add(java.nio.ByteBuffer,%20java.lang.Object)">add</a></strong>(<a
 
href="http://docs.oracle.com/javase/7/docs/api/java/nio/ByteBuffer.html?is-external=true";
 title="class or interface in java.nio">ByteBuffer</a>&nbsp;message,
+   <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;partitionKey)</code>
+<div class="block">Adds the given message to the message set, partitioned with 
the given partition key.</div>
+</td>
+</tr>
+<tr class="rowColor">
+<td 
class="colFirst"><code>com.google.common.util.concurrent.ListenableFuture&lt;<a 
href="http://docs.oracle.com/javase/7/docs/api/java/lang/Integer.html?is-external=true";
 title="class or interface in java.lang">Integer</a>&gt;</code></td>
+<td class="colLast"><code><strong><a 
href="../../../../../org/apache/twill/kafka/client/KafkaPublisher.Preparer.html#send()">send</a></strong>()</code>
+<div class="block">Sends all the messages being added through the <a 
href="../../../../../org/apache/twill/kafka/client/KafkaPublisher.Preparer.html#add(java.nio.ByteBuffer,%20java.lang.Object)"><code>add(java.nio.ByteBuffer,
 java.lang.Object)</code></a> method.</div>
+</td>
+</tr>
+</table>
+</li>
+</ul>
+</li>
+</ul>
+</div>
+<div class="details">
+<ul class="blockList">
+<li class="blockList">
+<!-- ============ METHOD DETAIL ========== -->
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+<h4>add</h4>
+<pre><a 
href="../../../../../org/apache/twill/kafka/client/KafkaPublisher.Preparer.html"
 title="interface in 
org.apache.twill.kafka.client">KafkaPublisher.Preparer</a>&nbsp;add(<a 
href="http://docs.oracle.com/javase/7/docs/api/java/nio/ByteBuffer.html?is-external=true";
 title="class or interface in java.nio">ByteBuffer</a>&nbsp;message,
+                          <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;partitionKey)</pre>
+<div class="block">Adds the given message to the message set, partitioned with 
the given partition key.</div>
+<dl><dt><span class="strong">Parameters:</span></dt><dd><code>message</code> - 
Remaining bytes in the ByteBuffer will be used as message payload. This method 
would
+                consume the ByteBuffer, meaning after this method returns, the 
remaining bytes in the
+                ByteBuffer would be 
<code>0</code>.</dd><dd><code>partitionKey</code> - Key for computing the 
partition Id to publish to. The <a 
href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#hashCode()"
 title="class or interface in java.lang"><code>Object.hashCode()</code></a> 
method
+                     will be invoke to compute the id.</dd>
+<dt><span class="strong">Returns:</span></dt><dd>This <a 
href="../../../../../org/apache/twill/kafka/client/KafkaPublisher.Preparer.html"
 title="interface in 
org.apache.twill.kafka.client"><code>KafkaPublisher.Preparer</code></a> 
instance.</dd></dl>
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+</ul>
+<a name="send()">
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+</a>
+<ul class="blockListLast">
+<li class="blockList">
+<h4>send</h4>
+<pre>com.google.common.util.concurrent.ListenableFuture&lt;<a 
href="http://docs.oracle.com/javase/7/docs/api/java/lang/Integer.html?is-external=true";
 title="class or interface in java.lang">Integer</a>&gt;&nbsp;send()</pre>
+<div class="block">Sends all the messages being added through the <a 
href="../../../../../org/apache/twill/kafka/client/KafkaPublisher.Preparer.html#add(java.nio.ByteBuffer,%20java.lang.Object)"><code>add(java.nio.ByteBuffer,
 java.lang.Object)</code></a> method.</div>
+<dl><dt><span class="strong">Returns:</span></dt><dd>A 
<code>ListenableFuture</code> that will be completed when the send action is 
done. If publish is succeeded,
+         it returns number of messages published, otherwise the failure reason 
will be carried in the future.
+         The <a 
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 title="class or interface in 
java.util.concurrent"><code>Future.cancel(boolean)</code></a> method has no 
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