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From ekoo...@apache.org
Subject svn commit: r1373684 [28/35] - in /giraph/site: ./ apidocs/ apidocs/org/apache/giraph/ apidocs/org/apache/giraph/benchmark/ apidocs/org/apache/giraph/benchmark/class-use/ apidocs/org/apache/giraph/bsp/ apidocs/org/apache/giraph/bsp/class-use/ apidocs/o...
Date Thu, 16 Aug 2012 01:32:58 GMT
Modified: giraph/site/xref/org/apache/giraph/comm/NettyClient.html
URL: http://svn.apache.org/viewvc/giraph/site/xref/org/apache/giraph/comm/NettyClient.html?rev=1373684&r1=1373683&r2=1373684&view=diff
==============================================================================
--- giraph/site/xref/org/apache/giraph/comm/NettyClient.html (original)
+++ giraph/site/xref/org/apache/giraph/comm/NettyClient.html Thu Aug 16 01:32:41 2012
@@ -28,297 +28,400 @@
 <a name="18" href="#18">18</a>  
 <a name="19" href="#19">19</a>  <strong class="jxr_keyword">package</strong> org.apache.giraph.comm;
 <a name="20" href="#20">20</a>  
-<a name="21" href="#21">21</a>  <strong class="jxr_keyword">import</strong> com.google.common.collect.Maps;
-<a name="22" href="#22">22</a>  <strong class="jxr_keyword">import</strong> java.net.InetSocketAddress;
-<a name="23" href="#23">23</a>  <strong class="jxr_keyword">import</strong> java.util.ArrayList;
-<a name="24" href="#24">24</a>  <strong class="jxr_keyword">import</strong> java.util.Collection;
+<a name="21" href="#21">21</a>  <strong class="jxr_keyword">import</strong> com.google.common.collect.Lists;
+<a name="22" href="#22">22</a>  <strong class="jxr_keyword">import</strong> com.google.common.collect.MapMaker;
+<a name="23" href="#23">23</a>  <strong class="jxr_keyword">import</strong> com.google.common.collect.Maps;
+<a name="24" href="#24">24</a>  <strong class="jxr_keyword">import</strong> java.net.InetSocketAddress;
 <a name="25" href="#25">25</a>  <strong class="jxr_keyword">import</strong> java.util.List;
 <a name="26" href="#26">26</a>  <strong class="jxr_keyword">import</strong> java.util.Map;
-<a name="27" href="#27">27</a>  <strong class="jxr_keyword">import</strong> java.util.concurrent.Executors;
-<a name="28" href="#28">28</a>  <strong class="jxr_keyword">import</strong> java.util.concurrent.atomic.AtomicInteger;
-<a name="29" href="#29">29</a>  
-<a name="30" href="#30">30</a>  <strong class="jxr_keyword">import</strong> org.apache.giraph.graph.GiraphJob;
-<a name="31" href="#31">31</a>  <strong class="jxr_keyword">import</strong> org.apache.hadoop.conf.Configuration;
-<a name="32" href="#32">32</a>  <strong class="jxr_keyword">import</strong> org.apache.hadoop.io.Writable;
-<a name="33" href="#33">33</a>  <strong class="jxr_keyword">import</strong> org.apache.hadoop.io.WritableComparable;
-<a name="34" href="#34">34</a>  <strong class="jxr_keyword">import</strong> org.apache.hadoop.mapreduce.Mapper;
-<a name="35" href="#35">35</a>  <strong class="jxr_keyword">import</strong> org.apache.log4j.Logger;
-<a name="36" href="#36">36</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.bootstrap.ClientBootstrap;
-<a name="37" href="#37">37</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.channel.Channel;
-<a name="38" href="#38">38</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.channel.ChannelConfig;
-<a name="39" href="#39">39</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.channel.ChannelFuture;
-<a name="40" href="#40">40</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.channel.ChannelFutureListener;
-<a name="41" href="#41">41</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.channel.ChannelPipeline;
-<a name="42" href="#42">42</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.channel.ChannelPipelineFactory;
-<a name="43" href="#43">43</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.channel.Channels;
-<a name="44" href="#44">44</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.channel.socket.nio.NioClientSocketChannelFactory;
-<a name="45" href="#45">45</a>  
-<a name="46" href="#46">46</a>  <em class="jxr_javadoccomment">/**</em>
-<a name="47" href="#47">47</a>  <em class="jxr_javadoccomment"> * Netty client for sending requests.</em>
-<a name="48" href="#48">48</a>  <em class="jxr_javadoccomment"> *</em>
-<a name="49" href="#49">49</a>  <em class="jxr_javadoccomment"> * @param &lt;I&gt; Vertex id</em>
-<a name="50" href="#50">50</a>  <em class="jxr_javadoccomment"> * @param &lt;V&gt; Vertex data</em>
-<a name="51" href="#51">51</a>  <em class="jxr_javadoccomment"> * @param &lt;E&gt; Edge data</em>
-<a name="52" href="#52">52</a>  <em class="jxr_javadoccomment"> * @param &lt;M&gt; Message data</em>
-<a name="53" href="#53">53</a>  <em class="jxr_javadoccomment"> */</em>
-<a name="54" href="#54">54</a>  @SuppressWarnings(<span class="jxr_string">"rawtypes"</span>)
-<a name="55" href="#55">55</a>  <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">class</strong> NettyClient&lt;I <strong class="jxr_keyword">extends</strong> WritableComparable,
-<a name="56" href="#56">56</a>      V <strong class="jxr_keyword">extends</strong> Writable, E <strong class="jxr_keyword">extends</strong> Writable,
-<a name="57" href="#57">57</a>      M <strong class="jxr_keyword">extends</strong> Writable&gt; {
-<a name="58" href="#58">58</a>    <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> Msecs to wait between waiting for all requests to finish */</em>
-<a name="59" href="#59">59</a>    <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> WAITING_REQUEST_MSECS = 15000;
-<a name="60" href="#60">60</a>    <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> Do we have a limit on number of open requests we can have */</em>
-<a name="61" href="#61">61</a>    <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> String LIMIT_NUMBER_OF_OPEN_REQUESTS =
-<a name="62" href="#62">62</a>        <span class="jxr_string">"giraph.waitForRequestsConfirmation"</span>;
-<a name="63" href="#63">63</a>    <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> Default choice about having a limit on number of open requests */</em>
-<a name="64" href="#64">64</a>    <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">boolean</strong> LIMIT_NUMBER_OF_OPEN_REQUESTS_DEFAULT = false;
-<a name="65" href="#65">65</a>    <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> Maximum number of requests without confirmation we should have */</em>
-<a name="66" href="#66">66</a>    <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> String MAX_NUMBER_OF_OPEN_REQUESTS =
-<a name="67" href="#67">67</a>        <span class="jxr_string">"giraph.maxNumberOfOpenRequests"</span>;
-<a name="68" href="#68">68</a>    <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> Default maximum number of requests without confirmation */</em>
-<a name="69" href="#69">69</a>    <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> MAX_NUMBER_OF_OPEN_REQUESTS_DEFAULT = 10000;
-<a name="70" href="#70">70</a>  
-<a name="71" href="#71">71</a>    <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> Class logger */</em>
-<a name="72" href="#72">72</a>    <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> Logger LOG = Logger.getLogger(NettyClient.<strong class="jxr_keyword">class</strong>);
-<a name="73" href="#73">73</a>    <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> Context used to report progress */</em>
-<a name="74" href="#74">74</a>    <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> Mapper&lt;?, ?, ?, ?&gt;.Context context;
-<a name="75" href="#75">75</a>    <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> Client bootstrap */</em>
-<a name="76" href="#76">76</a>    <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> ClientBootstrap bootstrap;
-<a name="77" href="#77">77</a>    <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> Atomic count of outstanding requests (synchronize on self) */</em>
-<a name="78" href="#78">78</a>    <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> AtomicInteger waitingRequestCount = <strong class="jxr_keyword">new</strong> AtomicInteger(0);
-<a name="79" href="#79">79</a>    <em class="jxr_javadoccomment">/**</em>
-<a name="80" href="#80">80</a>  <em class="jxr_javadoccomment">   * Map of the peer connections, mapping from remote socket address to client</em>
-<a name="81" href="#81">81</a>  <em class="jxr_javadoccomment">   * meta data</em>
-<a name="82" href="#82">82</a>  <em class="jxr_javadoccomment">   */</em>
-<a name="83" href="#83">83</a>    <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> Map&lt;InetSocketAddress, ChannelRotater&gt; addressChannelMap =
-<a name="84" href="#84">84</a>        Maps.newHashMap();
-<a name="85" href="#85">85</a>    <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> Number of channels per server */</em>
-<a name="86" href="#86">86</a>    <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> channelsPerServer;
-<a name="87" href="#87">87</a>    <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> Byte counter for this client */</em>
-<a name="88" href="#88">88</a>    <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> <a href="../../../../org/apache/giraph/comm/ByteCounter.html">ByteCounter</a> byteCounter = <strong class="jxr_keyword">new</strong> <a href="../../../../org/apache/giraph/comm/ByteCounter.html">ByteCounter</a>();
-<a name="89" href="#89">89</a>    <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> Send buffer size */</em>
-<a name="90" href="#90">90</a>    <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> sendBufferSize;
-<a name="91" href="#91">91</a>    <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> Receive buffer size */</em>
-<a name="92" href="#92">92</a>    <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> receiveBufferSize;
-<a name="93" href="#93">93</a>  
-<a name="94" href="#94">94</a>    <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> Do we have a limit on number of open requests */</em>
-<a name="95" href="#95">95</a>    <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">boolean</strong> limitNumberOfOpenRequests;
-<a name="96" href="#96">96</a>    <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> Maximum number of requests without confirmation we can have */</em>
-<a name="97" href="#97">97</a>    <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> maxNumberOfOpenRequests;
-<a name="98" href="#98">98</a>  
-<a name="99" href="#99">99</a>    <em class="jxr_javadoccomment">/**</em>
-<a name="100" href="#100">100</a> <em class="jxr_javadoccomment">   * Only constructor</em>
-<a name="101" href="#101">101</a> <em class="jxr_javadoccomment">   *</em>
-<a name="102" href="#102">102</a> <em class="jxr_javadoccomment">   * @param context Context for progress</em>
-<a name="103" href="#103">103</a> <em class="jxr_javadoccomment">   */</em>
-<a name="104" href="#104">104</a>   <strong class="jxr_keyword">public</strong> <a href="../../../../org/apache/giraph/comm/NettyClient.html">NettyClient</a>(Mapper&lt;?, ?, ?, ?&gt;.Context context) {
-<a name="105" href="#105">105</a>     <strong class="jxr_keyword">this</strong>.context = context;
-<a name="106" href="#106">106</a>     Configuration conf = context.getConfiguration();
-<a name="107" href="#107">107</a>     <strong class="jxr_keyword">this</strong>.channelsPerServer = conf.getInt(
-<a name="108" href="#108">108</a>         GiraphJob.CHANNELS_PER_SERVER,
-<a name="109" href="#109">109</a>         GiraphJob.DEFAULT_CHANNELS_PER_SERVER);
-<a name="110" href="#110">110</a>     sendBufferSize = conf.getInt(GiraphJob.CLIENT_SEND_BUFFER_SIZE,
-<a name="111" href="#111">111</a>         GiraphJob.DEFAULT_CLIENT_SEND_BUFFER_SIZE);
-<a name="112" href="#112">112</a>     receiveBufferSize = conf.getInt(GiraphJob.CLIENT_RECEIVE_BUFFER_SIZE,
-<a name="113" href="#113">113</a>         GiraphJob.DEFAULT_CLIENT_RECEIVE_BUFFER_SIZE);
-<a name="114" href="#114">114</a> 
-<a name="115" href="#115">115</a>     limitNumberOfOpenRequests = conf.getBoolean(
-<a name="116" href="#116">116</a>         LIMIT_NUMBER_OF_OPEN_REQUESTS,
-<a name="117" href="#117">117</a>         LIMIT_NUMBER_OF_OPEN_REQUESTS_DEFAULT);
-<a name="118" href="#118">118</a>     <strong class="jxr_keyword">if</strong> (limitNumberOfOpenRequests) {
-<a name="119" href="#119">119</a>       maxNumberOfOpenRequests = conf.getInt(
-<a name="120" href="#120">120</a>           MAX_NUMBER_OF_OPEN_REQUESTS,
-<a name="121" href="#121">121</a>           MAX_NUMBER_OF_OPEN_REQUESTS_DEFAULT);
-<a name="122" href="#122">122</a>       <strong class="jxr_keyword">if</strong> (LOG.isInfoEnabled()) {
-<a name="123" href="#123">123</a>         LOG.info(<span class="jxr_string">"NettyClient: Limit number of open requests to "</span> +
-<a name="124" href="#124">124</a>             maxNumberOfOpenRequests);
-<a name="125" href="#125">125</a>       }
-<a name="126" href="#126">126</a>     } <strong class="jxr_keyword">else</strong> {
-<a name="127" href="#127">127</a>       maxNumberOfOpenRequests = -1;
-<a name="128" href="#128">128</a>     }
-<a name="129" href="#129">129</a> 
-<a name="130" href="#130">130</a>     <em class="jxr_comment">// Configure the client.</em>
-<a name="131" href="#131">131</a>     bootstrap = <strong class="jxr_keyword">new</strong> ClientBootstrap(
-<a name="132" href="#132">132</a>         <strong class="jxr_keyword">new</strong> NioClientSocketChannelFactory(
-<a name="133" href="#133">133</a>             Executors.newCachedThreadPool(),
-<a name="134" href="#134">134</a>             Executors.newCachedThreadPool(),
-<a name="135" href="#135">135</a>             conf.getInt(GiraphJob.MSG_NUM_FLUSH_THREADS,
-<a name="136" href="#136">136</a>                 NettyServer.DEFAULT_MAXIMUM_THREAD_POOL_SIZE)));
-<a name="137" href="#137">137</a> 
-<a name="138" href="#138">138</a>     <em class="jxr_comment">// Set up the pipeline factory.</em>
-<a name="139" href="#139">139</a>     bootstrap.setPipelineFactory(<strong class="jxr_keyword">new</strong> ChannelPipelineFactory() {
-<a name="140" href="#140">140</a>       @Override
-<a name="141" href="#141">141</a>       <strong class="jxr_keyword">public</strong> ChannelPipeline getPipeline() <strong class="jxr_keyword">throws</strong> Exception {
-<a name="142" href="#142">142</a>         <strong class="jxr_keyword">return</strong> Channels.pipeline(
-<a name="143" href="#143">143</a>             byteCounter,
-<a name="144" href="#144">144</a>             <strong class="jxr_keyword">new</strong> <a href="../../../../org/apache/giraph/comm/RequestEncoder.html">RequestEncoder</a>(),
-<a name="145" href="#145">145</a>             <strong class="jxr_keyword">new</strong> <a href="../../../../org/apache/giraph/comm/ResponseClientHandler.html">ResponseClientHandler</a>(waitingRequestCount));
-<a name="146" href="#146">146</a>       }
-<a name="147" href="#147">147</a>     });
-<a name="148" href="#148">148</a>   }
-<a name="149" href="#149">149</a> 
-<a name="150" href="#150">150</a>   <em class="jxr_javadoccomment">/**</em>
-<a name="151" href="#151">151</a> <em class="jxr_javadoccomment">   * Connect to a collection of addresses</em>
-<a name="152" href="#152">152</a> <em class="jxr_javadoccomment">   *</em>
-<a name="153" href="#153">153</a> <em class="jxr_javadoccomment">   * @param addresses Addresses to connect to (if haven't already connected)</em>
-<a name="154" href="#154">154</a> <em class="jxr_javadoccomment">   */</em>
-<a name="155" href="#155">155</a>   <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> connectAllAddresses(Collection&lt;InetSocketAddress&gt; addresses) {
-<a name="156" href="#156">156</a>     List&lt;ChannelFuture&gt; waitingConnectionList =
-<a name="157" href="#157">157</a>         <strong class="jxr_keyword">new</strong> ArrayList&lt;ChannelFuture&gt;();
-<a name="158" href="#158">158</a>     <strong class="jxr_keyword">for</strong> (InetSocketAddress address : addresses) {
-<a name="159" href="#159">159</a>       <strong class="jxr_keyword">if</strong> (address == <strong class="jxr_keyword">null</strong>) {
-<a name="160" href="#160">160</a>         <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IllegalStateException(<span class="jxr_string">"connectAllAddresses: Null address "</span> +
-<a name="161" href="#161">161</a>             <span class="jxr_string">"in addresses "</span> + addresses);
-<a name="162" href="#162">162</a>       }
-<a name="163" href="#163">163</a> 
-<a name="164" href="#164">164</a>       <strong class="jxr_keyword">if</strong> (addressChannelMap.containsKey(address)) {
-<a name="165" href="#165">165</a>         <strong class="jxr_keyword">continue</strong>;
-<a name="166" href="#166">166</a>       }
-<a name="167" href="#167">167</a> 
-<a name="168" href="#168">168</a>       <em class="jxr_comment">// Start connecting to the remote server up to n time</em>
-<a name="169" href="#169">169</a>       <a href="../../../../org/apache/giraph/comm/ChannelRotater.html">ChannelRotater</a> channelRotater = <strong class="jxr_keyword">new</strong> <a href="../../../../org/apache/giraph/comm/ChannelRotater.html">ChannelRotater</a>();
-<a name="170" href="#170">170</a>       <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">int</strong> i = 0; i &lt; channelsPerServer; ++i) {
-<a name="171" href="#171">171</a>         ChannelFuture connectionFuture = bootstrap.connect(address);
-<a name="172" href="#172">172</a>         connectionFuture.getChannel().getConfig().setOption(<span class="jxr_string">"tcpNoDelay"</span>, <strong class="jxr_keyword">true</strong>);
-<a name="173" href="#173">173</a>         connectionFuture.getChannel().getConfig().setOption(<span class="jxr_string">"keepAlive"</span>, <strong class="jxr_keyword">true</strong>);
-<a name="174" href="#174">174</a>         connectionFuture.getChannel().getConfig().setOption(
-<a name="175" href="#175">175</a>             <span class="jxr_string">"sendBufferSize"</span>, sendBufferSize);
-<a name="176" href="#176">176</a>         connectionFuture.getChannel().getConfig().setOption(
-<a name="177" href="#177">177</a>             <span class="jxr_string">"receiveBufferSize"</span>, receiveBufferSize);
-<a name="178" href="#178">178</a>         channelRotater.addChannel(connectionFuture.getChannel());
-<a name="179" href="#179">179</a>         waitingConnectionList.add(connectionFuture);
-<a name="180" href="#180">180</a>       }
-<a name="181" href="#181">181</a>       addressChannelMap.put(address, channelRotater);
-<a name="182" href="#182">182</a>     }
-<a name="183" href="#183">183</a> 
-<a name="184" href="#184">184</a>     <em class="jxr_comment">// Wait for all the connections to succeed</em>
-<a name="185" href="#185">185</a>     <strong class="jxr_keyword">for</strong> (ChannelFuture waitingConnection : waitingConnectionList) {
-<a name="186" href="#186">186</a>       ChannelFuture future =
-<a name="187" href="#187">187</a>           waitingConnection.awaitUninterruptibly();
-<a name="188" href="#188">188</a>       <strong class="jxr_keyword">if</strong> (!future.isSuccess()) {
-<a name="189" href="#189">189</a>         <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IllegalStateException(<span class="jxr_string">"connectAllAddresses: Future failed "</span> +
-<a name="190" href="#190">190</a>             <span class="jxr_string">"with "</span> + future.getCause());
-<a name="191" href="#191">191</a>       }
-<a name="192" href="#192">192</a>       Channel channel = future.getChannel();
-<a name="193" href="#193">193</a>       <strong class="jxr_keyword">if</strong> (LOG.isInfoEnabled()) {
-<a name="194" href="#194">194</a>         LOG.info(<span class="jxr_string">"connectAllAddresses: Connected to "</span> +
-<a name="195" href="#195">195</a>             channel.getRemoteAddress());
-<a name="196" href="#196">196</a>       }
-<a name="197" href="#197">197</a> 
-<a name="198" href="#198">198</a>       <strong class="jxr_keyword">if</strong> (channel.getRemoteAddress() == <strong class="jxr_keyword">null</strong>) {
-<a name="199" href="#199">199</a>         <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IllegalStateException(<span class="jxr_string">"connectAllAddresses: Null remote "</span> +
-<a name="200" href="#200">200</a>             <span class="jxr_string">"address!"</span>);
-<a name="201" href="#201">201</a>       }
-<a name="202" href="#202">202</a>     }
-<a name="203" href="#203">203</a>   }
-<a name="204" href="#204">204</a> 
-<a name="205" href="#205">205</a>   <em class="jxr_javadoccomment">/**</em>
-<a name="206" href="#206">206</a> <em class="jxr_javadoccomment">   * Stop the client.</em>
-<a name="207" href="#207">207</a> <em class="jxr_javadoccomment">   */</em>
-<a name="208" href="#208">208</a>   <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> stop() {
-<a name="209" href="#209">209</a>     <em class="jxr_comment">// close connections asyncronously, in a Netty-approved</em>
-<a name="210" href="#210">210</a>     <em class="jxr_comment">// way, without cleaning up thread pools until all channels</em>
-<a name="211" href="#211">211</a>     <em class="jxr_comment">// in addressChannelMap are closed (success or failure)</em>
-<a name="212" href="#212">212</a>     <strong class="jxr_keyword">int</strong> channelCount = 0;
-<a name="213" href="#213">213</a>     <strong class="jxr_keyword">for</strong> (ChannelRotater channelRotater : addressChannelMap.values()) {
-<a name="214" href="#214">214</a>       channelCount += channelRotater.getChannels().size();
-<a name="215" href="#215">215</a>     }
-<a name="216" href="#216">216</a>     <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> done = channelCount;
-<a name="217" href="#217">217</a>     <strong class="jxr_keyword">final</strong> AtomicInteger count = <strong class="jxr_keyword">new</strong> AtomicInteger(0);
-<a name="218" href="#218">218</a>     <strong class="jxr_keyword">for</strong> (ChannelRotater channelRotater : addressChannelMap.values()) {
-<a name="219" href="#219">219</a>       <strong class="jxr_keyword">for</strong> (Channel channel : channelRotater.getChannels()) {
-<a name="220" href="#220">220</a>         ChannelFuture result = channel.close();
-<a name="221" href="#221">221</a>         result.addListener(<strong class="jxr_keyword">new</strong> ChannelFutureListener() {
-<a name="222" href="#222">222</a>           @Override
-<a name="223" href="#223">223</a>           <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> operationComplete(ChannelFuture cf) {
-<a name="224" href="#224">224</a>             <strong class="jxr_keyword">if</strong> (count.incrementAndGet() == done) {
-<a name="225" href="#225">225</a>               <strong class="jxr_keyword">if</strong> (LOG.isInfoEnabled()) {
-<a name="226" href="#226">226</a>                 LOG.info(<span class="jxr_string">"stop: reached wait threshold, "</span> +
-<a name="227" href="#227">227</a>                     done + <span class="jxr_string">" connections closed, releasing "</span> +
-<a name="228" href="#228">228</a>                     <span class="jxr_string">"NettyClient.bootstrap resources now."</span>);
-<a name="229" href="#229">229</a>               }
-<a name="230" href="#230">230</a>               bootstrap.releaseExternalResources();
-<a name="231" href="#231">231</a>             }
-<a name="232" href="#232">232</a>           }
-<a name="233" href="#233">233</a>         });
-<a name="234" href="#234">234</a>       }
-<a name="235" href="#235">235</a>     }
-<a name="236" href="#236">236</a>   }
-<a name="237" href="#237">237</a> 
-<a name="238" href="#238">238</a>   <em class="jxr_javadoccomment">/**</em>
-<a name="239" href="#239">239</a> <em class="jxr_javadoccomment">   * Send a request to a remote server (should be already connected)</em>
-<a name="240" href="#240">240</a> <em class="jxr_javadoccomment">   *</em>
-<a name="241" href="#241">241</a> <em class="jxr_javadoccomment">   * @param remoteServer Server to send the request to</em>
-<a name="242" href="#242">242</a> <em class="jxr_javadoccomment">   * @param request Request to send</em>
-<a name="243" href="#243">243</a> <em class="jxr_javadoccomment">   */</em>
-<a name="244" href="#244">244</a>   <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> sendWritableRequest(InetSocketAddress remoteServer,
-<a name="245" href="#245">245</a>                                   WritableRequest&lt;I, V, E, M&gt; request) {
-<a name="246" href="#246">246</a>     <strong class="jxr_keyword">if</strong> (waitingRequestCount.get() == 0) {
-<a name="247" href="#247">247</a>       byteCounter.resetAll();
-<a name="248" href="#248">248</a>     }
-<a name="249" href="#249">249</a>     waitingRequestCount.incrementAndGet();
-<a name="250" href="#250">250</a>     Channel channel = addressChannelMap.get(remoteServer).nextChannel();
-<a name="251" href="#251">251</a>     <strong class="jxr_keyword">if</strong> (channel == <strong class="jxr_keyword">null</strong>) {
-<a name="252" href="#252">252</a>       <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IllegalStateException(
-<a name="253" href="#253">253</a>           <span class="jxr_string">"sendWritableRequest: No channel exists for "</span> + remoteServer);
-<a name="254" href="#254">254</a>     }
-<a name="255" href="#255">255</a>     channel.write(request);
-<a name="256" href="#256">256</a>     <strong class="jxr_keyword">if</strong> (limitNumberOfOpenRequests &amp;&amp;
-<a name="257" href="#257">257</a>         waitingRequestCount.get() &gt; maxNumberOfOpenRequests) {
-<a name="258" href="#258">258</a>       waitSomeRequests(maxNumberOfOpenRequests);
-<a name="259" href="#259">259</a>     }
-<a name="260" href="#260">260</a>   }
-<a name="261" href="#261">261</a> 
-<a name="262" href="#262">262</a>   <em class="jxr_javadoccomment">/**</em>
-<a name="263" href="#263">263</a> <em class="jxr_javadoccomment">   * Ensure all the request sent so far are complete.</em>
-<a name="264" href="#264">264</a> <em class="jxr_javadoccomment">   *</em>
-<a name="265" href="#265">265</a> <em class="jxr_javadoccomment">   * @throws InterruptedException</em>
-<a name="266" href="#266">266</a> <em class="jxr_javadoccomment">   */</em>
-<a name="267" href="#267">267</a>   <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> waitAllRequests() {
-<a name="268" href="#268">268</a>     waitSomeRequests(0);
-<a name="269" href="#269">269</a>     <strong class="jxr_keyword">if</strong> (LOG.isInfoEnabled()) {
-<a name="270" href="#270">270</a>       LOG.info(<span class="jxr_string">"waitAllRequests: Finished all requests. "</span> +
-<a name="271" href="#271">271</a>           byteCounter.getMetrics());
-<a name="272" href="#272">272</a>     }
-<a name="273" href="#273">273</a>   }
-<a name="274" href="#274">274</a> 
-<a name="275" href="#275">275</a>   <em class="jxr_javadoccomment">/**</em>
-<a name="276" href="#276">276</a> <em class="jxr_javadoccomment">   * Ensure that at most maxOpenRequests are not complete</em>
-<a name="277" href="#277">277</a> <em class="jxr_javadoccomment">   *</em>
-<a name="278" href="#278">278</a> <em class="jxr_javadoccomment">   * @param maxOpenRequests Maximum number of requests which can be not</em>
-<a name="279" href="#279">279</a> <em class="jxr_javadoccomment">   *                        complete</em>
-<a name="280" href="#280">280</a> <em class="jxr_javadoccomment">   */</em>
-<a name="281" href="#281">281</a>   <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> waitSomeRequests(<strong class="jxr_keyword">int</strong> maxOpenRequests) {
-<a name="282" href="#282">282</a>     <strong class="jxr_keyword">synchronized</strong> (waitingRequestCount) {
-<a name="283" href="#283">283</a>       <strong class="jxr_keyword">while</strong> (waitingRequestCount.get() &gt; maxOpenRequests) {
-<a name="284" href="#284">284</a>         <strong class="jxr_keyword">if</strong> (LOG.isInfoEnabled()) {
-<a name="285" href="#285">285</a>           LOG.info(<span class="jxr_string">"waitSomeRequests: Waiting interval of "</span> +
-<a name="286" href="#286">286</a>               WAITING_REQUEST_MSECS + <span class="jxr_string">" msecs, "</span> + waitingRequestCount +
-<a name="287" href="#287">287</a>               <span class="jxr_string">" open requests, waiting for it to be &lt;= "</span> + maxOpenRequests +
-<a name="288" href="#288">288</a>               <span class="jxr_string">", "</span> + byteCounter.getMetrics());
-<a name="289" href="#289">289</a>         }
-<a name="290" href="#290">290</a>         <strong class="jxr_keyword">try</strong> {
-<a name="291" href="#291">291</a>           waitingRequestCount.wait(WAITING_REQUEST_MSECS);
-<a name="292" href="#292">292</a>         } <strong class="jxr_keyword">catch</strong> (InterruptedException e) {
-<a name="293" href="#293">293</a>           LOG.error(<span class="jxr_string">"waitFutures: Got unexpected InterruptedException"</span>, e);
-<a name="294" href="#294">294</a>         }
-<a name="295" href="#295">295</a>         <em class="jxr_comment">// Make sure that waiting doesn't kill the job</em>
-<a name="296" href="#296">296</a>         context.progress();
-<a name="297" href="#297">297</a>       }
-<a name="298" href="#298">298</a>     }
-<a name="299" href="#299">299</a>   }
-<a name="300" href="#300">300</a> 
-<a name="301" href="#301">301</a>   <em class="jxr_javadoccomment">/**</em>
-<a name="302" href="#302">302</a> <em class="jxr_javadoccomment">   * Returning configuration of the first channel.</em>
-<a name="303" href="#303">303</a> <em class="jxr_javadoccomment">   * @throws ArrayIndexOutOfBoundsException if no</em>
-<a name="304" href="#304">304</a> <em class="jxr_javadoccomment">   *   channels exist in the client's address =&gt; channel map.</em>
-<a name="305" href="#305">305</a> <em class="jxr_javadoccomment">   * @return ChannelConfig for the first channel (if any).</em>
-<a name="306" href="#306">306</a> <em class="jxr_javadoccomment">   */</em>
-<a name="307" href="#307">307</a>   <strong class="jxr_keyword">public</strong> ChannelConfig getChannelConfig() {
-<a name="308" href="#308">308</a>     <strong class="jxr_keyword">return</strong> ((Channel) addressChannelMap.values().toArray()[0]).getConfig();
-<a name="309" href="#309">309</a>   }
-<a name="310" href="#310">310</a> 
-<a name="311" href="#311">311</a> }
+<a name="27" href="#27">27</a>  <strong class="jxr_keyword">import</strong> java.util.Set;
+<a name="28" href="#28">28</a>  <strong class="jxr_keyword">import</strong> java.util.concurrent.ConcurrentMap;
+<a name="29" href="#29">29</a>  <strong class="jxr_keyword">import</strong> java.util.concurrent.Executors;
+<a name="30" href="#30">30</a>  <strong class="jxr_keyword">import</strong> java.util.concurrent.atomic.AtomicInteger;
+<a name="31" href="#31">31</a>  
+<a name="32" href="#32">32</a>  <strong class="jxr_keyword">import</strong> org.apache.giraph.graph.GiraphJob;
+<a name="33" href="#33">33</a>  <strong class="jxr_keyword">import</strong> org.apache.giraph.utils.TimedLogger;
+<a name="34" href="#34">34</a>  <strong class="jxr_keyword">import</strong> org.apache.hadoop.conf.Configuration;
+<a name="35" href="#35">35</a>  <strong class="jxr_keyword">import</strong> org.apache.hadoop.io.Writable;
+<a name="36" href="#36">36</a>  <strong class="jxr_keyword">import</strong> org.apache.hadoop.io.WritableComparable;
+<a name="37" href="#37">37</a>  <strong class="jxr_keyword">import</strong> org.apache.hadoop.mapreduce.Mapper;
+<a name="38" href="#38">38</a>  <strong class="jxr_keyword">import</strong> org.apache.log4j.Logger;
+<a name="39" href="#39">39</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.bootstrap.ClientBootstrap;
+<a name="40" href="#40">40</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.channel.Channel;
+<a name="41" href="#41">41</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.channel.ChannelConfig;
+<a name="42" href="#42">42</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.channel.ChannelFuture;
+<a name="43" href="#43">43</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.channel.ChannelFutureListener;
+<a name="44" href="#44">44</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.channel.ChannelPipeline;
+<a name="45" href="#45">45</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.channel.ChannelPipelineFactory;
+<a name="46" href="#46">46</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.channel.Channels;
+<a name="47" href="#47">47</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.channel.socket.nio.NioClientSocketChannelFactory;
+<a name="48" href="#48">48</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.handler.codec.frame.FixedLengthFrameDecoder;
+<a name="49" href="#49">49</a>  
+<a name="50" href="#50">50</a>  <em class="jxr_javadoccomment">/**</em>
+<a name="51" href="#51">51</a>  <em class="jxr_javadoccomment"> * Netty client for sending requests.</em>
+<a name="52" href="#52">52</a>  <em class="jxr_javadoccomment"> *</em>
+<a name="53" href="#53">53</a>  <em class="jxr_javadoccomment"> * @param &lt;I&gt; Vertex id</em>
+<a name="54" href="#54">54</a>  <em class="jxr_javadoccomment"> * @param &lt;V&gt; Vertex data</em>
+<a name="55" href="#55">55</a>  <em class="jxr_javadoccomment"> * @param &lt;E&gt; Edge data</em>
+<a name="56" href="#56">56</a>  <em class="jxr_javadoccomment"> * @param &lt;M&gt; Message data</em>
+<a name="57" href="#57">57</a>  <em class="jxr_javadoccomment"> */</em>
+<a name="58" href="#58">58</a>  @SuppressWarnings(<span class="jxr_string">"rawtypes"</span>)
+<a name="59" href="#59">59</a>  <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">class</strong> NettyClient&lt;I <strong class="jxr_keyword">extends</strong> WritableComparable,
+<a name="60" href="#60">60</a>      V <strong class="jxr_keyword">extends</strong> Writable, E <strong class="jxr_keyword">extends</strong> Writable,
+<a name="61" href="#61">61</a>      M <strong class="jxr_keyword">extends</strong> Writable&gt; {
+<a name="62" href="#62">62</a>    <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> Msecs to wait between waiting for all requests to finish */</em>
+<a name="63" href="#63">63</a>    <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> WAITING_REQUEST_MSECS = 15000;
+<a name="64" href="#64">64</a>    <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> Do we have a limit on number of open requests we can have */</em>
+<a name="65" href="#65">65</a>    <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> String LIMIT_NUMBER_OF_OPEN_REQUESTS =
+<a name="66" href="#66">66</a>        <span class="jxr_string">"giraph.waitForRequestsConfirmation"</span>;
+<a name="67" href="#67">67</a>    <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> Default choice about having a limit on number of open requests */</em>
+<a name="68" href="#68">68</a>    <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">boolean</strong> LIMIT_NUMBER_OF_OPEN_REQUESTS_DEFAULT = false;
+<a name="69" href="#69">69</a>    <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> Maximum number of requests without confirmation we should have */</em>
+<a name="70" href="#70">70</a>    <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> String MAX_NUMBER_OF_OPEN_REQUESTS =
+<a name="71" href="#71">71</a>        <span class="jxr_string">"giraph.maxNumberOfOpenRequests"</span>;
+<a name="72" href="#72">72</a>    <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> Default maximum number of requests without confirmation */</em>
+<a name="73" href="#73">73</a>    <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> MAX_NUMBER_OF_OPEN_REQUESTS_DEFAULT = 10000;
+<a name="74" href="#74">74</a>    <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> Maximum number of requests to list (for debugging) */</em>
+<a name="75" href="#75">75</a>    <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> MAX_REQUESTS_TO_LIST = 10;
+<a name="76" href="#76">76</a>    <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> 30 seconds to connect by default */</em>
+<a name="77" href="#77">77</a>    <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> MAX_CONNECTION_MILLISECONDS_DEFAULT = 30 * 1000;
+<a name="78" href="#78">78</a>    <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> Class logger */</em>
+<a name="79" href="#79">79</a>    <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> Logger LOG = Logger.getLogger(NettyClient.<strong class="jxr_keyword">class</strong>);
+<a name="80" href="#80">80</a>    <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> Context used to report progress */</em>
+<a name="81" href="#81">81</a>    <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> Mapper&lt;?, ?, ?, ?&gt;.Context context;
+<a name="82" href="#82">82</a>    <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> Client bootstrap */</em>
+<a name="83" href="#83">83</a>    <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> ClientBootstrap bootstrap;
+<a name="84" href="#84">84</a>    <em class="jxr_javadoccomment">/**</em>
+<a name="85" href="#85">85</a>  <em class="jxr_javadoccomment">   * Map of the peer connections, mapping from remote socket address to client</em>
+<a name="86" href="#86">86</a>  <em class="jxr_javadoccomment">   * meta data</em>
+<a name="87" href="#87">87</a>  <em class="jxr_javadoccomment">   */</em>
+<a name="88" href="#88">88</a>    <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> Map&lt;InetSocketAddress, ChannelRotater&gt; addressChannelMap =
+<a name="89" href="#89">89</a>        Maps.newHashMap();
+<a name="90" href="#90">90</a>    <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> Atomic request id, used in outstandingRequestMap */</em>
+<a name="91" href="#91">91</a>    <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> AtomicInteger requestId = <strong class="jxr_keyword">new</strong> AtomicInteger(0);
+<a name="92" href="#92">92</a>    <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> Outstanding request map (tracks all requests). */</em>
+<a name="93" href="#93">93</a>    <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> ConcurrentMap&lt;Long, RequestInfo&gt; outstandingRequestMap;
+<a name="94" href="#94">94</a>    <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> Number of channels per server */</em>
+<a name="95" href="#95">95</a>    <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> channelsPerServer;
+<a name="96" href="#96">96</a>    <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> Byte counter for this client */</em>
+<a name="97" href="#97">97</a>    <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> <a href="../../../../org/apache/giraph/comm/ByteCounter.html">ByteCounter</a> byteCounter = <strong class="jxr_keyword">new</strong> <a href="../../../../org/apache/giraph/comm/ByteCounter.html">ByteCounter</a>();
+<a name="98" href="#98">98</a>    <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> Send buffer size */</em>
+<a name="99" href="#99">99</a>    <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> sendBufferSize;
+<a name="100" href="#100">100</a>   <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> Receive buffer size */</em>
+<a name="101" href="#101">101</a>   <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> receiveBufferSize;
+<a name="102" href="#102">102</a> 
+<a name="103" href="#103">103</a>   <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> Do we have a limit on number of open requests */</em>
+<a name="104" href="#104">104</a>   <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">boolean</strong> limitNumberOfOpenRequests;
+<a name="105" href="#105">105</a>   <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> Maximum number of requests without confirmation we can have */</em>
+<a name="106" href="#106">106</a>   <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> maxNumberOfOpenRequests;
+<a name="107" href="#107">107</a>   <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> Maximum number of connnection failures */</em>
+<a name="108" href="#108">108</a>   <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> maxConnectionFailures;
+<a name="109" href="#109">109</a>   <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> Timed logger for printing request debugging */</em>
+<a name="110" href="#110">110</a>   <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> <a href="../../../../org/apache/giraph/utils/TimedLogger.html">TimedLogger</a> requestLogger = <strong class="jxr_keyword">new</strong> <a href="../../../../org/apache/giraph/utils/TimedLogger.html">TimedLogger</a>(15 * 1000, LOG);
+<a name="111" href="#111">111</a> 
+<a name="112" href="#112">112</a>   <em class="jxr_javadoccomment">/**</em>
+<a name="113" href="#113">113</a> <em class="jxr_javadoccomment">   * Only constructor</em>
+<a name="114" href="#114">114</a> <em class="jxr_javadoccomment">   *</em>
+<a name="115" href="#115">115</a> <em class="jxr_javadoccomment">   * @param context Context for progress</em>
+<a name="116" href="#116">116</a> <em class="jxr_javadoccomment">   */</em>
+<a name="117" href="#117">117</a>   <strong class="jxr_keyword">public</strong> <a href="../../../../org/apache/giraph/comm/NettyClient.html">NettyClient</a>(Mapper&lt;?, ?, ?, ?&gt;.Context context) {
+<a name="118" href="#118">118</a>     <strong class="jxr_keyword">this</strong>.context = context;
+<a name="119" href="#119">119</a>     Configuration conf = context.getConfiguration();
+<a name="120" href="#120">120</a>     <strong class="jxr_keyword">this</strong>.channelsPerServer = conf.getInt(
+<a name="121" href="#121">121</a>         GiraphJob.CHANNELS_PER_SERVER,
+<a name="122" href="#122">122</a>         GiraphJob.DEFAULT_CHANNELS_PER_SERVER);
+<a name="123" href="#123">123</a>     sendBufferSize = conf.getInt(GiraphJob.CLIENT_SEND_BUFFER_SIZE,
+<a name="124" href="#124">124</a>         GiraphJob.DEFAULT_CLIENT_SEND_BUFFER_SIZE);
+<a name="125" href="#125">125</a>     receiveBufferSize = conf.getInt(GiraphJob.CLIENT_RECEIVE_BUFFER_SIZE,
+<a name="126" href="#126">126</a>         GiraphJob.DEFAULT_CLIENT_RECEIVE_BUFFER_SIZE);
+<a name="127" href="#127">127</a> 
+<a name="128" href="#128">128</a>     limitNumberOfOpenRequests = conf.getBoolean(
+<a name="129" href="#129">129</a>         LIMIT_NUMBER_OF_OPEN_REQUESTS,
+<a name="130" href="#130">130</a>         LIMIT_NUMBER_OF_OPEN_REQUESTS_DEFAULT);
+<a name="131" href="#131">131</a>     <strong class="jxr_keyword">if</strong> (limitNumberOfOpenRequests) {
+<a name="132" href="#132">132</a>       maxNumberOfOpenRequests = conf.getInt(
+<a name="133" href="#133">133</a>           MAX_NUMBER_OF_OPEN_REQUESTS,
+<a name="134" href="#134">134</a>           MAX_NUMBER_OF_OPEN_REQUESTS_DEFAULT);
+<a name="135" href="#135">135</a>       <strong class="jxr_keyword">if</strong> (LOG.isInfoEnabled()) {
+<a name="136" href="#136">136</a>         LOG.info(<span class="jxr_string">"NettyClient: Limit number of open requests to "</span> +
+<a name="137" href="#137">137</a>             maxNumberOfOpenRequests);
+<a name="138" href="#138">138</a>       }
+<a name="139" href="#139">139</a>     } <strong class="jxr_keyword">else</strong> {
+<a name="140" href="#140">140</a>       maxNumberOfOpenRequests = -1;
+<a name="141" href="#141">141</a>     }
+<a name="142" href="#142">142</a> 
+<a name="143" href="#143">143</a>     maxConnectionFailures = conf.getInt(
+<a name="144" href="#144">144</a>         GiraphJob.NETTY_MAX_CONNECTION_FAILURES,
+<a name="145" href="#145">145</a>         GiraphJob.NETTY_MAX_CONNECTION_FAILURES_DEFAULT);
+<a name="146" href="#146">146</a> 
+<a name="147" href="#147">147</a>     <strong class="jxr_keyword">int</strong> maxThreads = conf.getInt(GiraphJob.MSG_NUM_FLUSH_THREADS,
+<a name="148" href="#148">148</a>         NettyServer.MAXIMUM_THREAD_POOL_SIZE_DEFAULT);
+<a name="149" href="#149">149</a>     outstandingRequestMap =
+<a name="150" href="#150">150</a>         <strong class="jxr_keyword">new</strong> MapMaker().concurrencyLevel(maxThreads).makeMap();
+<a name="151" href="#151">151</a> 
+<a name="152" href="#152">152</a>     <em class="jxr_comment">// Configure the client.</em>
+<a name="153" href="#153">153</a>     bootstrap = <strong class="jxr_keyword">new</strong> ClientBootstrap(
+<a name="154" href="#154">154</a>         <strong class="jxr_keyword">new</strong> NioClientSocketChannelFactory(
+<a name="155" href="#155">155</a>             Executors.newCachedThreadPool(),
+<a name="156" href="#156">156</a>             Executors.newCachedThreadPool(),
+<a name="157" href="#157">157</a>             maxThreads));
+<a name="158" href="#158">158</a>     bootstrap.setOption(<span class="jxr_string">"connectTimeoutMillis"</span>,
+<a name="159" href="#159">159</a>         MAX_CONNECTION_MILLISECONDS_DEFAULT);
+<a name="160" href="#160">160</a>     bootstrap.setOption(<span class="jxr_string">"tcpNoDelay"</span>, <strong class="jxr_keyword">true</strong>);
+<a name="161" href="#161">161</a>     bootstrap.setOption(<span class="jxr_string">"keepAlive"</span>, <strong class="jxr_keyword">true</strong>);
+<a name="162" href="#162">162</a>     bootstrap.setOption(<span class="jxr_string">"sendBufferSize"</span>, sendBufferSize);
+<a name="163" href="#163">163</a>     bootstrap.setOption(<span class="jxr_string">"receiveBufferSize"</span>, receiveBufferSize);
+<a name="164" href="#164">164</a> 
+<a name="165" href="#165">165</a>     <em class="jxr_comment">// Set up the pipeline factory.</em>
+<a name="166" href="#166">166</a>     bootstrap.setPipelineFactory(<strong class="jxr_keyword">new</strong> ChannelPipelineFactory() {
+<a name="167" href="#167">167</a>       @Override
+<a name="168" href="#168">168</a>       <strong class="jxr_keyword">public</strong> ChannelPipeline getPipeline() <strong class="jxr_keyword">throws</strong> Exception {
+<a name="169" href="#169">169</a>         <strong class="jxr_keyword">return</strong> Channels.pipeline(
+<a name="170" href="#170">170</a>             byteCounter,
+<a name="171" href="#171">171</a>             <strong class="jxr_keyword">new</strong> FixedLengthFrameDecoder(9),
+<a name="172" href="#172">172</a>             <strong class="jxr_keyword">new</strong> <a href="../../../../org/apache/giraph/comm/RequestEncoder.html">RequestEncoder</a>(),
+<a name="173" href="#173">173</a>             <strong class="jxr_keyword">new</strong> <a href="../../../../org/apache/giraph/comm/ResponseClientHandler.html">ResponseClientHandler</a>(outstandingRequestMap));
+<a name="174" href="#174">174</a>       }
+<a name="175" href="#175">175</a>     });
+<a name="176" href="#176">176</a>   }
+<a name="177" href="#177">177</a> 
+<a name="178" href="#178">178</a>   <em class="jxr_javadoccomment">/**</em>
+<a name="179" href="#179">179</a> <em class="jxr_javadoccomment">   * Pair object for connectAllAddresses().</em>
+<a name="180" href="#180">180</a> <em class="jxr_javadoccomment">   */</em>
+<a name="181" href="#181">181</a>   <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../org/apache/giraph/comm/NettyClient.html">ChannelFutureAddress</a> {
+<a name="182" href="#182">182</a>     <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> Future object */</em>
+<a name="183" href="#183">183</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> ChannelFuture future;
+<a name="184" href="#184">184</a>     <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> Address of the future */</em>
+<a name="185" href="#185">185</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> InetSocketAddress address;
+<a name="186" href="#186">186</a> 
+<a name="187" href="#187">187</a>     <em class="jxr_javadoccomment">/**</em>
+<a name="188" href="#188">188</a> <em class="jxr_javadoccomment">     * Constructor.</em>
+<a name="189" href="#189">189</a> <em class="jxr_javadoccomment">     *</em>
+<a name="190" href="#190">190</a> <em class="jxr_javadoccomment">     * @param future Immutable future</em>
+<a name="191" href="#191">191</a> <em class="jxr_javadoccomment">     * @param address Immutable address</em>
+<a name="192" href="#192">192</a> <em class="jxr_javadoccomment">     */</em>
+<a name="193" href="#193">193</a>     <a href="../../../../org/apache/giraph/comm/NettyClient.html">ChannelFutureAddress</a>(ChannelFuture future, InetSocketAddress address) {
+<a name="194" href="#194">194</a>       <strong class="jxr_keyword">this</strong>.future = future;
+<a name="195" href="#195">195</a>       <strong class="jxr_keyword">this</strong>.address = address;
+<a name="196" href="#196">196</a>     }
+<a name="197" href="#197">197</a>   }
+<a name="198" href="#198">198</a> 
+<a name="199" href="#199">199</a>   <em class="jxr_javadoccomment">/**</em>
+<a name="200" href="#200">200</a> <em class="jxr_javadoccomment">   * Connect to a collection of addresses</em>
+<a name="201" href="#201">201</a> <em class="jxr_javadoccomment">   *</em>
+<a name="202" href="#202">202</a> <em class="jxr_javadoccomment">   * @param addresses Addresses to connect to (if haven't already connected)</em>
+<a name="203" href="#203">203</a> <em class="jxr_javadoccomment">   */</em>
+<a name="204" href="#204">204</a>   <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> connectAllAddresses(Set&lt;InetSocketAddress&gt; addresses) {
+<a name="205" href="#205">205</a>     List&lt;ChannelFutureAddress&gt; waitingConnectionList =
+<a name="206" href="#206">206</a>         Lists.newArrayListWithCapacity(addresses.size() * channelsPerServer);
+<a name="207" href="#207">207</a>     <strong class="jxr_keyword">for</strong> (InetSocketAddress address : addresses) {
+<a name="208" href="#208">208</a>       context.progress();
+<a name="209" href="#209">209</a>       <strong class="jxr_keyword">if</strong> (address == <strong class="jxr_keyword">null</strong> || address.getHostName() == <strong class="jxr_keyword">null</strong> ||
+<a name="210" href="#210">210</a>           address.getHostName().isEmpty()) {
+<a name="211" href="#211">211</a>         <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IllegalStateException(<span class="jxr_string">"connectAllAddresses: Null address "</span> +
+<a name="212" href="#212">212</a>             <span class="jxr_string">"in addresses "</span> + addresses);
+<a name="213" href="#213">213</a>       }
+<a name="214" href="#214">214</a>       <strong class="jxr_keyword">if</strong> (address.isUnresolved()) {
+<a name="215" href="#215">215</a>         <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IllegalStateException(<span class="jxr_string">"connectAllAddresses: Unresolved "</span> +
+<a name="216" href="#216">216</a>             <span class="jxr_string">"address "</span> + address);
+<a name="217" href="#217">217</a>       }
+<a name="218" href="#218">218</a> 
+<a name="219" href="#219">219</a>       <strong class="jxr_keyword">if</strong> (addressChannelMap.containsKey(address)) {
+<a name="220" href="#220">220</a>         <strong class="jxr_keyword">continue</strong>;
+<a name="221" href="#221">221</a>       }
+<a name="222" href="#222">222</a> 
+<a name="223" href="#223">223</a>       <em class="jxr_comment">// Start connecting to the remote server up to n time</em>
+<a name="224" href="#224">224</a>       <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">int</strong> i = 0; i &lt; channelsPerServer; ++i) {
+<a name="225" href="#225">225</a>         ChannelFuture connectionFuture = bootstrap.connect(address);
+<a name="226" href="#226">226</a> 
+<a name="227" href="#227">227</a>         waitingConnectionList.add(
+<a name="228" href="#228">228</a>             <strong class="jxr_keyword">new</strong> <a href="../../../../org/apache/giraph/comm/NettyClient.html">ChannelFutureAddress</a>(connectionFuture, address));
+<a name="229" href="#229">229</a>       }
+<a name="230" href="#230">230</a>     }
+<a name="231" href="#231">231</a> 
+<a name="232" href="#232">232</a>     <em class="jxr_comment">// Wait for all the connections to succeed up to n tries</em>
+<a name="233" href="#233">233</a>     <strong class="jxr_keyword">int</strong> failures = 0;
+<a name="234" href="#234">234</a>     <strong class="jxr_keyword">int</strong> connected = 0;
+<a name="235" href="#235">235</a>     <strong class="jxr_keyword">while</strong> (failures &lt; maxConnectionFailures) {
+<a name="236" href="#236">236</a>       List&lt;ChannelFutureAddress&gt; nextCheckFutures = Lists.newArrayList();
+<a name="237" href="#237">237</a>       <strong class="jxr_keyword">for</strong> (ChannelFutureAddress waitingConnection : waitingConnectionList) {
+<a name="238" href="#238">238</a>         context.progress();
+<a name="239" href="#239">239</a>         ChannelFuture future =
+<a name="240" href="#240">240</a>             waitingConnection.future.awaitUninterruptibly();
+<a name="241" href="#241">241</a>         <strong class="jxr_keyword">if</strong> (!future.isSuccess()) {
+<a name="242" href="#242">242</a>           LOG.warn(<span class="jxr_string">"connectAllAddresses: Future failed "</span> +
+<a name="243" href="#243">243</a>               <span class="jxr_string">"to connect with "</span> + waitingConnection.address + <span class="jxr_string">" with "</span> +
+<a name="244" href="#244">244</a>               failures + <span class="jxr_string">" failures and because of "</span> + future.getCause());
+<a name="245" href="#245">245</a> 
+<a name="246" href="#246">246</a>           ChannelFuture connectionFuture =
+<a name="247" href="#247">247</a>               bootstrap.connect(waitingConnection.address);
+<a name="248" href="#248">248</a>           nextCheckFutures.add(<strong class="jxr_keyword">new</strong> <a href="../../../../org/apache/giraph/comm/NettyClient.html">ChannelFutureAddress</a>(connectionFuture,
+<a name="249" href="#249">249</a>               waitingConnection.address));
+<a name="250" href="#250">250</a>           ++failures;
+<a name="251" href="#251">251</a>         } <strong class="jxr_keyword">else</strong> {
+<a name="252" href="#252">252</a>           Channel channel = future.getChannel();
+<a name="253" href="#253">253</a>           <strong class="jxr_keyword">if</strong> (LOG.isInfoEnabled()) {
+<a name="254" href="#254">254</a>             LOG.info(<span class="jxr_string">"connectAllAddresses: Connected to "</span> +
+<a name="255" href="#255">255</a>                 channel.getRemoteAddress());
+<a name="256" href="#256">256</a>           }
+<a name="257" href="#257">257</a> 
+<a name="258" href="#258">258</a>           <strong class="jxr_keyword">if</strong> (channel.getRemoteAddress() == <strong class="jxr_keyword">null</strong>) {
+<a name="259" href="#259">259</a>             <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IllegalStateException(
+<a name="260" href="#260">260</a>                 <span class="jxr_string">"connectAllAddresses: Null remote address!"</span>);
+<a name="261" href="#261">261</a>           }
+<a name="262" href="#262">262</a> 
+<a name="263" href="#263">263</a>           <a href="../../../../org/apache/giraph/comm/ChannelRotater.html">ChannelRotater</a> rotater =
+<a name="264" href="#264">264</a>               addressChannelMap.get(waitingConnection.address);
+<a name="265" href="#265">265</a>           <strong class="jxr_keyword">if</strong> (rotater == <strong class="jxr_keyword">null</strong>) {
+<a name="266" href="#266">266</a>             rotater = <strong class="jxr_keyword">new</strong> <a href="../../../../org/apache/giraph/comm/ChannelRotater.html">ChannelRotater</a>();
+<a name="267" href="#267">267</a>             addressChannelMap.put(waitingConnection.address, rotater);
+<a name="268" href="#268">268</a>           }
+<a name="269" href="#269">269</a>           rotater.addChannel(future.getChannel());
+<a name="270" href="#270">270</a>           ++connected;
+<a name="271" href="#271">271</a>         }
+<a name="272" href="#272">272</a>       }
+<a name="273" href="#273">273</a>       LOG.info(<span class="jxr_string">"connectAllAddresses: Successfully added "</span> +
+<a name="274" href="#274">274</a>           (waitingConnectionList.size() - nextCheckFutures.size()) +
+<a name="275" href="#275">275</a>           <span class="jxr_string">" connections, ("</span> + connected + <span class="jxr_string">" total connected) "</span> +
+<a name="276" href="#276">276</a>           nextCheckFutures.size() + <span class="jxr_string">" failed, "</span> +
+<a name="277" href="#277">277</a>           failures + <span class="jxr_string">" failures total."</span>);
+<a name="278" href="#278">278</a>       <strong class="jxr_keyword">if</strong> (nextCheckFutures.isEmpty()) {
+<a name="279" href="#279">279</a>         <strong class="jxr_keyword">break</strong>;
+<a name="280" href="#280">280</a>       }
+<a name="281" href="#281">281</a>       waitingConnectionList = nextCheckFutures;
+<a name="282" href="#282">282</a>     }
+<a name="283" href="#283">283</a>     <strong class="jxr_keyword">if</strong> (failures &gt;= maxConnectionFailures) {
+<a name="284" href="#284">284</a>       <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IllegalStateException(
+<a name="285" href="#285">285</a>           <span class="jxr_string">"connectAllAddresses: Too many failures ("</span> + failures + <span class="jxr_string">")."</span>);
+<a name="286" href="#286">286</a>     }
+<a name="287" href="#287">287</a>   }
+<a name="288" href="#288">288</a> 
+<a name="289" href="#289">289</a>   <em class="jxr_javadoccomment">/**</em>
+<a name="290" href="#290">290</a> <em class="jxr_javadoccomment">   * Stop the client.</em>
+<a name="291" href="#291">291</a> <em class="jxr_javadoccomment">   */</em>
+<a name="292" href="#292">292</a>   <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> stop() {
+<a name="293" href="#293">293</a>     <em class="jxr_comment">// Close connections asyncronously, in a Netty-approved</em>
+<a name="294" href="#294">294</a>     <em class="jxr_comment">// way, without cleaning up thread pools until all channels</em>
+<a name="295" href="#295">295</a>     <em class="jxr_comment">// in addressChannelMap are closed (success or failure)</em>
+<a name="296" href="#296">296</a>     <strong class="jxr_keyword">int</strong> channelCount = 0;
+<a name="297" href="#297">297</a>     <strong class="jxr_keyword">for</strong> (ChannelRotater channelRotater : addressChannelMap.values()) {
+<a name="298" href="#298">298</a>       channelCount += channelRotater.getChannels().size();
+<a name="299" href="#299">299</a>     }
+<a name="300" href="#300">300</a>     <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> done = channelCount;
+<a name="301" href="#301">301</a>     <strong class="jxr_keyword">final</strong> AtomicInteger count = <strong class="jxr_keyword">new</strong> AtomicInteger(0);
+<a name="302" href="#302">302</a>     <strong class="jxr_keyword">for</strong> (ChannelRotater channelRotater : addressChannelMap.values()) {
+<a name="303" href="#303">303</a>       <strong class="jxr_keyword">for</strong> (Channel channel : channelRotater.getChannels()) {
+<a name="304" href="#304">304</a>         ChannelFuture result = channel.close();
+<a name="305" href="#305">305</a>         result.addListener(<strong class="jxr_keyword">new</strong> ChannelFutureListener() {
+<a name="306" href="#306">306</a>           @Override
+<a name="307" href="#307">307</a>           <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> operationComplete(ChannelFuture cf) {
+<a name="308" href="#308">308</a>             <strong class="jxr_keyword">if</strong> (count.incrementAndGet() == done) {
+<a name="309" href="#309">309</a>               <strong class="jxr_keyword">if</strong> (LOG.isInfoEnabled()) {
+<a name="310" href="#310">310</a>                 LOG.info(<span class="jxr_string">"stop: reached wait threshold, "</span> +
+<a name="311" href="#311">311</a>                     done + <span class="jxr_string">" connections closed, releasing "</span> +
+<a name="312" href="#312">312</a>                     <span class="jxr_string">"NettyClient.bootstrap resources now."</span>);
+<a name="313" href="#313">313</a>               }
+<a name="314" href="#314">314</a>               bootstrap.releaseExternalResources();
+<a name="315" href="#315">315</a>             }
+<a name="316" href="#316">316</a>           }
+<a name="317" href="#317">317</a>         });
+<a name="318" href="#318">318</a>       }
+<a name="319" href="#319">319</a>     }
+<a name="320" href="#320">320</a>   }
+<a name="321" href="#321">321</a> 
+<a name="322" href="#322">322</a>   <em class="jxr_javadoccomment">/**</em>
+<a name="323" href="#323">323</a> <em class="jxr_javadoccomment">   * Send a request to a remote server (should be already connected)</em>
+<a name="324" href="#324">324</a> <em class="jxr_javadoccomment">   *</em>
+<a name="325" href="#325">325</a> <em class="jxr_javadoccomment">   * @param remoteServer Server to send the request to</em>
+<a name="326" href="#326">326</a> <em class="jxr_javadoccomment">   * @param request Request to send</em>
+<a name="327" href="#327">327</a> <em class="jxr_javadoccomment">   */</em>
+<a name="328" href="#328">328</a>   <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> sendWritableRequest(InetSocketAddress remoteServer,
+<a name="329" href="#329">329</a>                                   WritableRequest&lt;I, V, E, M&gt; request) {
+<a name="330" href="#330">330</a>     <strong class="jxr_keyword">if</strong> (outstandingRequestMap.isEmpty()) {
+<a name="331" href="#331">331</a>       byteCounter.resetAll();
+<a name="332" href="#332">332</a>     }
+<a name="333" href="#333">333</a>     request.setRequestId(requestId.incrementAndGet());
+<a name="334" href="#334">334</a>     Channel channel = addressChannelMap.get(remoteServer).nextChannel();
+<a name="335" href="#335">335</a>     <strong class="jxr_keyword">if</strong> (channel == <strong class="jxr_keyword">null</strong>) {
+<a name="336" href="#336">336</a>       <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IllegalStateException(
+<a name="337" href="#337">337</a>           <span class="jxr_string">"sendWritableRequest: No channel exists for "</span> + remoteServer);
+<a name="338" href="#338">338</a>     }
+<a name="339" href="#339">339</a>     <a href="../../../../org/apache/giraph/comm/RequestInfo.html">RequestInfo</a> newRequestInfo = <strong class="jxr_keyword">new</strong> <a href="../../../../org/apache/giraph/comm/RequestInfo.html">RequestInfo</a>(remoteServer);
+<a name="340" href="#340">340</a>     <a href="../../../../org/apache/giraph/comm/RequestInfo.html">RequestInfo</a> oldRequestInfo = outstandingRequestMap.putIfAbsent(
+<a name="341" href="#341">341</a>         request.getRequestId(), newRequestInfo);
+<a name="342" href="#342">342</a>     <strong class="jxr_keyword">if</strong> (oldRequestInfo != <strong class="jxr_keyword">null</strong>) {
+<a name="343" href="#343">343</a>       <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IllegalStateException(<span class="jxr_string">"sendWritableRequest: Impossible to "</span> +
+<a name="344" href="#344">344</a>           <span class="jxr_string">"have a previous request id = "</span> + request.getRequestId() + <span class="jxr_string">", "</span> +
+<a name="345" href="#345">345</a>           <span class="jxr_string">"request info of "</span> + oldRequestInfo);
+<a name="346" href="#346">346</a>     }
+<a name="347" href="#347">347</a>     ChannelFuture writeFuture = channel.write(request);
+<a name="348" href="#348">348</a>     newRequestInfo.setWriteFuture(writeFuture);
+<a name="349" href="#349">349</a> 
+<a name="350" href="#350">350</a>     <strong class="jxr_keyword">if</strong> (limitNumberOfOpenRequests &amp;&amp;
+<a name="351" href="#351">351</a>         outstandingRequestMap.size() &gt; maxNumberOfOpenRequests) {
+<a name="352" href="#352">352</a>       waitSomeRequests(maxNumberOfOpenRequests);
+<a name="353" href="#353">353</a>     }
+<a name="354" href="#354">354</a>   }
+<a name="355" href="#355">355</a> 
+<a name="356" href="#356">356</a>   <em class="jxr_javadoccomment">/**</em>
+<a name="357" href="#357">357</a> <em class="jxr_javadoccomment">   * Ensure all the request sent so far are complete.</em>
+<a name="358" href="#358">358</a> <em class="jxr_javadoccomment">   *</em>
+<a name="359" href="#359">359</a> <em class="jxr_javadoccomment">   * @throws InterruptedException</em>
+<a name="360" href="#360">360</a> <em class="jxr_javadoccomment">   */</em>
+<a name="361" href="#361">361</a>   <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> waitAllRequests() {
+<a name="362" href="#362">362</a>     waitSomeRequests(0);
+<a name="363" href="#363">363</a>     <strong class="jxr_keyword">if</strong> (LOG.isInfoEnabled()) {
+<a name="364" href="#364">364</a>       LOG.info(<span class="jxr_string">"waitAllRequests: Finished all requests. "</span> +
+<a name="365" href="#365">365</a>           byteCounter.getMetrics());
+<a name="366" href="#366">366</a>     }
+<a name="367" href="#367">367</a>   }
+<a name="368" href="#368">368</a> 
+<a name="369" href="#369">369</a>   <em class="jxr_javadoccomment">/**</em>
+<a name="370" href="#370">370</a> <em class="jxr_javadoccomment">   * Ensure that at most maxOpenRequests are not complete</em>
+<a name="371" href="#371">371</a> <em class="jxr_javadoccomment">   *</em>
+<a name="372" href="#372">372</a> <em class="jxr_javadoccomment">   * @param maxOpenRequests Maximum number of requests which can be not</em>
+<a name="373" href="#373">373</a> <em class="jxr_javadoccomment">   *                        complete</em>
+<a name="374" href="#374">374</a> <em class="jxr_javadoccomment">   */</em>
+<a name="375" href="#375">375</a>   <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> waitSomeRequests(<strong class="jxr_keyword">int</strong> maxOpenRequests) {
+<a name="376" href="#376">376</a>     <strong class="jxr_keyword">synchronized</strong> (outstandingRequestMap) {
+<a name="377" href="#377">377</a>       <strong class="jxr_keyword">while</strong> (outstandingRequestMap.size() &gt; maxOpenRequests) {
+<a name="378" href="#378">378</a>         <strong class="jxr_keyword">if</strong> (LOG.isInfoEnabled() &amp;&amp; requestLogger.isPrintable()) {
+<a name="379" href="#379">379</a>           LOG.info(<span class="jxr_string">"waitSomeRequests: Waiting interval of "</span> +
+<a name="380" href="#380">380</a>               WAITING_REQUEST_MSECS + <span class="jxr_string">" msecs, "</span> +
+<a name="381" href="#381">381</a>               outstandingRequestMap.size() +
+<a name="382" href="#382">382</a>               <span class="jxr_string">" open requests, waiting for it to be &lt;= "</span> + maxOpenRequests +
+<a name="383" href="#383">383</a>               <span class="jxr_string">", "</span> + byteCounter.getMetrics());
+<a name="384" href="#384">384</a> 
+<a name="385" href="#385">385</a>           <strong class="jxr_keyword">if</strong> (outstandingRequestMap.size() &lt; MAX_REQUESTS_TO_LIST) {
+<a name="386" href="#386">386</a>             <strong class="jxr_keyword">for</strong> (Map.Entry&lt;Long, RequestInfo&gt; entry :
+<a name="387" href="#387">387</a>                 outstandingRequestMap.entrySet()) {
+<a name="388" href="#388">388</a>               LOG.info(<span class="jxr_string">"waitSomeRequests: Waiting for request "</span> +
+<a name="389" href="#389">389</a>                   entry.getKey() + <span class="jxr_string">" - "</span> + entry.getValue());
+<a name="390" href="#390">390</a>             }
+<a name="391" href="#391">391</a>           }
+<a name="392" href="#392">392</a>         }
+<a name="393" href="#393">393</a>         <strong class="jxr_keyword">try</strong> {
+<a name="394" href="#394">394</a>           outstandingRequestMap.wait(WAITING_REQUEST_MSECS);
+<a name="395" href="#395">395</a>         } <strong class="jxr_keyword">catch</strong> (InterruptedException e) {
+<a name="396" href="#396">396</a>           LOG.error(<span class="jxr_string">"waitFutures: Got unexpected InterruptedException"</span>, e);
+<a name="397" href="#397">397</a>         }
+<a name="398" href="#398">398</a>         <em class="jxr_comment">// Make sure that waiting doesn't kill the job</em>
+<a name="399" href="#399">399</a>         context.progress();
+<a name="400" href="#400">400</a>       }
+<a name="401" href="#401">401</a>     }
+<a name="402" href="#402">402</a>   }
+<a name="403" href="#403">403</a> 
+<a name="404" href="#404">404</a>   <em class="jxr_javadoccomment">/**</em>
+<a name="405" href="#405">405</a> <em class="jxr_javadoccomment">   * Returning configuration of the first channel.</em>
+<a name="406" href="#406">406</a> <em class="jxr_javadoccomment">   * @throws ArrayIndexOutOfBoundsException if no</em>
+<a name="407" href="#407">407</a> <em class="jxr_javadoccomment">   *   channels exist in the client's address =&gt; channel map.</em>
+<a name="408" href="#408">408</a> <em class="jxr_javadoccomment">   * @return ChannelConfig for the first channel (if any).</em>
+<a name="409" href="#409">409</a> <em class="jxr_javadoccomment">   */</em>
+<a name="410" href="#410">410</a>   <strong class="jxr_keyword">public</strong> ChannelConfig getChannelConfig() {
+<a name="411" href="#411">411</a>     <strong class="jxr_keyword">return</strong> ((Channel) addressChannelMap.values().toArray()[0]).getConfig();
+<a name="412" href="#412">412</a>   }
+<a name="413" href="#413">413</a> 
+<a name="414" href="#414">414</a> }
 </pre>
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