http://git-wip-us.apache.org/repos/asf/hbase-site/blob/071f974b/devapidocs/src-html/org/apache/hadoop/hbase/client/example/MultiThreadedClientExample.SingleWriteExampleCallable.html
----------------------------------------------------------------------
diff --git
a/devapidocs/src-html/org/apache/hadoop/hbase/client/example/MultiThreadedClientExample.SingleWriteExampleCallable.html
b/devapidocs/src-html/org/apache/hadoop/hbase/client/example/MultiThreadedClientExample.SingleWriteExampleCallable.html
index 0b8baa8..c77170b 100644
---
a/devapidocs/src-html/org/apache/hadoop/hbase/client/example/MultiThreadedClientExample.SingleWriteExampleCallable.html
+++
b/devapidocs/src-html/org/apache/hadoop/hbase/client/example/MultiThreadedClientExample.SingleWriteExampleCallable.html
@@ -30,308 +30,325 @@
<span class="sourceLineNo">022</span>import org.apache.commons.logging.Log;<a
name="line.22"></a>
<span class="sourceLineNo">023</span>import
org.apache.commons.logging.LogFactory;<a name="line.23"></a>
<span class="sourceLineNo">024</span>import
org.apache.hadoop.conf.Configured;<a name="line.24"></a>
-<span class="sourceLineNo">025</span>import
org.apache.hadoop.hbase.TableName;<a name="line.25"></a>
-<span class="sourceLineNo">026</span>import
org.apache.hadoop.hbase.client.Connection;<a name="line.26"></a>
-<span class="sourceLineNo">027</span>import
org.apache.hadoop.hbase.client.ConnectionFactory;<a name="line.27"></a>
-<span class="sourceLineNo">028</span>import
org.apache.hadoop.hbase.client.Put;<a name="line.28"></a>
-<span class="sourceLineNo">029</span>import
org.apache.hadoop.hbase.client.RegionLocator;<a name="line.29"></a>
-<span class="sourceLineNo">030</span>import
org.apache.hadoop.hbase.client.Result;<a name="line.30"></a>
-<span class="sourceLineNo">031</span>import
org.apache.hadoop.hbase.client.ResultScanner;<a name="line.31"></a>
-<span class="sourceLineNo">032</span>import
org.apache.hadoop.hbase.client.Scan;<a name="line.32"></a>
-<span class="sourceLineNo">033</span>import
org.apache.hadoop.hbase.client.Table;<a name="line.33"></a>
-<span class="sourceLineNo">034</span>import
org.apache.hadoop.hbase.filter.KeyOnlyFilter;<a name="line.34"></a>
-<span class="sourceLineNo">035</span>import
org.apache.hadoop.hbase.util.Bytes;<a name="line.35"></a>
-<span class="sourceLineNo">036</span>import org.apache.hadoop.util.Tool;<a
name="line.36"></a>
-<span class="sourceLineNo">037</span>import
org.apache.hadoop.util.ToolRunner;<a name="line.37"></a>
-<span class="sourceLineNo">038</span><a name="line.38"></a>
-<span class="sourceLineNo">039</span>import java.io.IOException;<a
name="line.39"></a>
-<span class="sourceLineNo">040</span>import java.util.ArrayList;<a
name="line.40"></a>
-<span class="sourceLineNo">041</span>import java.util.List;<a
name="line.41"></a>
-<span class="sourceLineNo">042</span>import java.util.concurrent.Callable;<a
name="line.42"></a>
-<span class="sourceLineNo">043</span>import
java.util.concurrent.ExecutorService;<a name="line.43"></a>
-<span class="sourceLineNo">044</span>import java.util.concurrent.Executors;<a
name="line.44"></a>
-<span class="sourceLineNo">045</span>import
java.util.concurrent.ForkJoinPool;<a name="line.45"></a>
-<span class="sourceLineNo">046</span>import java.util.concurrent.Future;<a
name="line.46"></a>
-<span class="sourceLineNo">047</span>import
java.util.concurrent.ThreadFactory;<a name="line.47"></a>
-<span class="sourceLineNo">048</span>import
java.util.concurrent.ThreadLocalRandom;<a name="line.48"></a>
-<span class="sourceLineNo">049</span>import java.util.concurrent.TimeUnit;<a
name="line.49"></a>
-<span class="sourceLineNo">050</span><a name="line.50"></a>
-<span class="sourceLineNo">051</span><a name="line.51"></a>
-<span class="sourceLineNo">052</span>/**<a name="line.52"></a>
-<span class="sourceLineNo">053</span> * Example on how to use HBase's {@link
Connection} and {@link Table} in a<a name="line.53"></a>
-<span class="sourceLineNo">054</span> * multi-threaded environment. Each table
is a light weight object<a name="line.54"></a>
-<span class="sourceLineNo">055</span> * that is created and thrown away.
Connections are heavy weight objects<a name="line.55"></a>
-<span class="sourceLineNo">056</span> * that hold on to zookeeper connections,
async processes, and other state.<a name="line.56"></a>
-<span class="sourceLineNo">057</span> *<a name="line.57"></a>
-<span class="sourceLineNo">058</span> * <pre><a name="line.58"></a>
-<span class="sourceLineNo">059</span> * Usage:<a name="line.59"></a>
-<span class="sourceLineNo">060</span> * bin/hbase
org.apache.hadoop.hbase.client.example.MultiThreadedClientExample testTableName
500000<a name="line.60"></a>
-<span class="sourceLineNo">061</span> * </pre><a name="line.61"></a>
-<span class="sourceLineNo">062</span> *<a name="line.62"></a>
-<span class="sourceLineNo">063</span> * <p><a name="line.63"></a>
-<span class="sourceLineNo">064</span> * The table should already be created
before running the command.<a name="line.64"></a>
-<span class="sourceLineNo">065</span> * This example expects one column family
named d.<a name="line.65"></a>
-<span class="sourceLineNo">066</span> * </p><a name="line.66"></a>
-<span class="sourceLineNo">067</span> * <p><a name="line.67"></a>
-<span class="sourceLineNo">068</span> * This is meant to show different
operations that are likely to be<a name="line.68"></a>
-<span class="sourceLineNo">069</span> * done in a real world application.
These operations are:<a name="line.69"></a>
-<span class="sourceLineNo">070</span> * </p><a name="line.70"></a>
-<span class="sourceLineNo">071</span> *<a name="line.71"></a>
-<span class="sourceLineNo">072</span> * <ul><a name="line.72"></a>
-<span class="sourceLineNo">073</span> * <li><a name="line.73"></a>
-<span class="sourceLineNo">074</span> * 30% of all operations performed
are batch writes.<a name="line.74"></a>
-<span class="sourceLineNo">075</span> * 30 puts are created and sent out
at a time.<a name="line.75"></a>
-<span class="sourceLineNo">076</span> * The response for all puts is
waited on.<a name="line.76"></a>
-<span class="sourceLineNo">077</span> * </li><a name="line.77"></a>
-<span class="sourceLineNo">078</span> * <li><a name="line.78"></a>
-<span class="sourceLineNo">079</span> * 20% of all operations are single
writes.<a name="line.79"></a>
-<span class="sourceLineNo">080</span> * A single put is sent out and the
response is waited for.<a name="line.80"></a>
-<span class="sourceLineNo">081</span> * </li><a name="line.81"></a>
-<span class="sourceLineNo">082</span> * <li><a name="line.82"></a>
-<span class="sourceLineNo">083</span> * 50% of all operations are scans.<a
name="line.83"></a>
-<span class="sourceLineNo">084</span> * These scans start at a random
place and scan up to 100 rows.<a name="line.84"></a>
-<span class="sourceLineNo">085</span> * </li><a name="line.85"></a>
-<span class="sourceLineNo">086</span> * </ul><a name="line.86"></a>
-<span class="sourceLineNo">087</span> *<a name="line.87"></a>
-<span class="sourceLineNo">088</span> */<a name="line.88"></a>
-<span class="sourceLineNo">089</span>public class MultiThreadedClientExample
extends Configured implements Tool {<a name="line.89"></a>
-<span class="sourceLineNo">090</span> private static final Log LOG =
LogFactory.getLog(MultiThreadedClientExample.class);<a name="line.90"></a>
-<span class="sourceLineNo">091</span> private static final int
DEFAULT_NUM_OPERATIONS = 500000;<a name="line.91"></a>
-<span class="sourceLineNo">092</span><a name="line.92"></a>
-<span class="sourceLineNo">093</span> /**<a name="line.93"></a>
-<span class="sourceLineNo">094</span> * The name of the column family.<a
name="line.94"></a>
-<span class="sourceLineNo">095</span> *<a name="line.95"></a>
-<span class="sourceLineNo">096</span> * d for default.<a name="line.96"></a>
-<span class="sourceLineNo">097</span> */<a name="line.97"></a>
-<span class="sourceLineNo">098</span> private static final byte[] FAMILY =
Bytes.toBytes("d");<a name="line.98"></a>
-<span class="sourceLineNo">099</span><a name="line.99"></a>
-<span class="sourceLineNo">100</span> /**<a name="line.100"></a>
-<span class="sourceLineNo">101</span> * For the example we're just using one
qualifier.<a name="line.101"></a>
-<span class="sourceLineNo">102</span> */<a name="line.102"></a>
-<span class="sourceLineNo">103</span> private static final byte[] QUAL =
Bytes.toBytes("test");<a name="line.103"></a>
-<span class="sourceLineNo">104</span><a name="line.104"></a>
-<span class="sourceLineNo">105</span> private final ExecutorService
internalPool;<a name="line.105"></a>
-<span class="sourceLineNo">106</span><a name="line.106"></a>
-<span class="sourceLineNo">107</span> private final int threads;<a
name="line.107"></a>
-<span class="sourceLineNo">108</span><a name="line.108"></a>
-<span class="sourceLineNo">109</span> public MultiThreadedClientExample()
throws IOException {<a name="line.109"></a>
-<span class="sourceLineNo">110</span> // Base number of threads.<a
name="line.110"></a>
-<span class="sourceLineNo">111</span> // This represents the number of
threads you application has<a name="line.111"></a>
-<span class="sourceLineNo">112</span> // that can be interacting with an
hbase client.<a name="line.112"></a>
-<span class="sourceLineNo">113</span> this.threads =
Runtime.getRuntime().availableProcessors() * 4;<a name="line.113"></a>
-<span class="sourceLineNo">114</span><a name="line.114"></a>
-<span class="sourceLineNo">115</span> // Daemon threads are great for
things that get shut down.<a name="line.115"></a>
-<span class="sourceLineNo">116</span> ThreadFactory threadFactory = new
ThreadFactoryBuilder()<a name="line.116"></a>
-<span class="sourceLineNo">117</span>
.setDaemon(true).setNameFormat("internal-pol-%d").build();<a
name="line.117"></a>
-<span class="sourceLineNo">118</span><a name="line.118"></a>
-<span class="sourceLineNo">119</span><a name="line.119"></a>
-<span class="sourceLineNo">120</span> this.internalPool =
Executors.newFixedThreadPool(threads, threadFactory);<a name="line.120"></a>
-<span class="sourceLineNo">121</span> }<a name="line.121"></a>
+<span class="sourceLineNo">025</span>import
org.apache.hadoop.hbase.CellBuilder;<a name="line.25"></a>
+<span class="sourceLineNo">026</span>import
org.apache.hadoop.hbase.CellBuilderFactory;<a name="line.26"></a>
+<span class="sourceLineNo">027</span>import
org.apache.hadoop.hbase.CellBuilderType;<a name="line.27"></a>
+<span class="sourceLineNo">028</span>import
org.apache.hadoop.hbase.TableName;<a name="line.28"></a>
+<span class="sourceLineNo">029</span>import
org.apache.hadoop.hbase.client.Connection;<a name="line.29"></a>
+<span class="sourceLineNo">030</span>import
org.apache.hadoop.hbase.client.ConnectionFactory;<a name="line.30"></a>
+<span class="sourceLineNo">031</span>import
org.apache.hadoop.hbase.client.Put;<a name="line.31"></a>
+<span class="sourceLineNo">032</span>import
org.apache.hadoop.hbase.client.RegionLocator;<a name="line.32"></a>
+<span class="sourceLineNo">033</span>import
org.apache.hadoop.hbase.client.Result;<a name="line.33"></a>
+<span class="sourceLineNo">034</span>import
org.apache.hadoop.hbase.client.ResultScanner;<a name="line.34"></a>
+<span class="sourceLineNo">035</span>import
org.apache.hadoop.hbase.client.Scan;<a name="line.35"></a>
+<span class="sourceLineNo">036</span>import
org.apache.hadoop.hbase.client.Table;<a name="line.36"></a>
+<span class="sourceLineNo">037</span>import
org.apache.hadoop.hbase.filter.KeyOnlyFilter;<a name="line.37"></a>
+<span class="sourceLineNo">038</span>import
org.apache.hadoop.hbase.util.Bytes;<a name="line.38"></a>
+<span class="sourceLineNo">039</span>import org.apache.hadoop.util.Tool;<a
name="line.39"></a>
+<span class="sourceLineNo">040</span>import
org.apache.hadoop.util.ToolRunner;<a name="line.40"></a>
+<span class="sourceLineNo">041</span><a name="line.41"></a>
+<span class="sourceLineNo">042</span>import java.io.IOException;<a
name="line.42"></a>
+<span class="sourceLineNo">043</span>import java.util.ArrayList;<a
name="line.43"></a>
+<span class="sourceLineNo">044</span>import java.util.List;<a
name="line.44"></a>
+<span class="sourceLineNo">045</span>import java.util.concurrent.Callable;<a
name="line.45"></a>
+<span class="sourceLineNo">046</span>import
java.util.concurrent.ExecutorService;<a name="line.46"></a>
+<span class="sourceLineNo">047</span>import java.util.concurrent.Executors;<a
name="line.47"></a>
+<span class="sourceLineNo">048</span>import
java.util.concurrent.ForkJoinPool;<a name="line.48"></a>
+<span class="sourceLineNo">049</span>import java.util.concurrent.Future;<a
name="line.49"></a>
+<span class="sourceLineNo">050</span>import
java.util.concurrent.ThreadFactory;<a name="line.50"></a>
+<span class="sourceLineNo">051</span>import
java.util.concurrent.ThreadLocalRandom;<a name="line.51"></a>
+<span class="sourceLineNo">052</span>import java.util.concurrent.TimeUnit;<a
name="line.52"></a>
+<span class="sourceLineNo">053</span><a name="line.53"></a>
+<span class="sourceLineNo">054</span><a name="line.54"></a>
+<span class="sourceLineNo">055</span>/**<a name="line.55"></a>
+<span class="sourceLineNo">056</span> * Example on how to use HBase's {@link
Connection} and {@link Table} in a<a name="line.56"></a>
+<span class="sourceLineNo">057</span> * multi-threaded environment. Each table
is a light weight object<a name="line.57"></a>
+<span class="sourceLineNo">058</span> * that is created and thrown away.
Connections are heavy weight objects<a name="line.58"></a>
+<span class="sourceLineNo">059</span> * that hold on to zookeeper connections,
async processes, and other state.<a name="line.59"></a>
+<span class="sourceLineNo">060</span> *<a name="line.60"></a>
+<span class="sourceLineNo">061</span> * <pre><a name="line.61"></a>
+<span class="sourceLineNo">062</span> * Usage:<a name="line.62"></a>
+<span class="sourceLineNo">063</span> * bin/hbase
org.apache.hadoop.hbase.client.example.MultiThreadedClientExample testTableName
500000<a name="line.63"></a>
+<span class="sourceLineNo">064</span> * </pre><a name="line.64"></a>
+<span class="sourceLineNo">065</span> *<a name="line.65"></a>
+<span class="sourceLineNo">066</span> * <p><a name="line.66"></a>
+<span class="sourceLineNo">067</span> * The table should already be created
before running the command.<a name="line.67"></a>
+<span class="sourceLineNo">068</span> * This example expects one column family
named d.<a name="line.68"></a>
+<span class="sourceLineNo">069</span> * </p><a name="line.69"></a>
+<span class="sourceLineNo">070</span> * <p><a name="line.70"></a>
+<span class="sourceLineNo">071</span> * This is meant to show different
operations that are likely to be<a name="line.71"></a>
+<span class="sourceLineNo">072</span> * done in a real world application.
These operations are:<a name="line.72"></a>
+<span class="sourceLineNo">073</span> * </p><a name="line.73"></a>
+<span class="sourceLineNo">074</span> *<a name="line.74"></a>
+<span class="sourceLineNo">075</span> * <ul><a name="line.75"></a>
+<span class="sourceLineNo">076</span> * <li><a name="line.76"></a>
+<span class="sourceLineNo">077</span> * 30% of all operations performed
are batch writes.<a name="line.77"></a>
+<span class="sourceLineNo">078</span> * 30 puts are created and sent out
at a time.<a name="line.78"></a>
+<span class="sourceLineNo">079</span> * The response for all puts is
waited on.<a name="line.79"></a>
+<span class="sourceLineNo">080</span> * </li><a name="line.80"></a>
+<span class="sourceLineNo">081</span> * <li><a name="line.81"></a>
+<span class="sourceLineNo">082</span> * 20% of all operations are single
writes.<a name="line.82"></a>
+<span class="sourceLineNo">083</span> * A single put is sent out and the
response is waited for.<a name="line.83"></a>
+<span class="sourceLineNo">084</span> * </li><a name="line.84"></a>
+<span class="sourceLineNo">085</span> * <li><a name="line.85"></a>
+<span class="sourceLineNo">086</span> * 50% of all operations are scans.<a
name="line.86"></a>
+<span class="sourceLineNo">087</span> * These scans start at a random
place and scan up to 100 rows.<a name="line.87"></a>
+<span class="sourceLineNo">088</span> * </li><a name="line.88"></a>
+<span class="sourceLineNo">089</span> * </ul><a name="line.89"></a>
+<span class="sourceLineNo">090</span> *<a name="line.90"></a>
+<span class="sourceLineNo">091</span> */<a name="line.91"></a>
+<span class="sourceLineNo">092</span>public class MultiThreadedClientExample
extends Configured implements Tool {<a name="line.92"></a>
+<span class="sourceLineNo">093</span> private static final Log LOG =
LogFactory.getLog(MultiThreadedClientExample.class);<a name="line.93"></a>
+<span class="sourceLineNo">094</span> private static final int
DEFAULT_NUM_OPERATIONS = 500000;<a name="line.94"></a>
+<span class="sourceLineNo">095</span><a name="line.95"></a>
+<span class="sourceLineNo">096</span> /**<a name="line.96"></a>
+<span class="sourceLineNo">097</span> * The name of the column family.<a
name="line.97"></a>
+<span class="sourceLineNo">098</span> *<a name="line.98"></a>
+<span class="sourceLineNo">099</span> * d for default.<a name="line.99"></a>
+<span class="sourceLineNo">100</span> */<a name="line.100"></a>
+<span class="sourceLineNo">101</span> private static final byte[] FAMILY =
Bytes.toBytes("d");<a name="line.101"></a>
+<span class="sourceLineNo">102</span><a name="line.102"></a>
+<span class="sourceLineNo">103</span> /**<a name="line.103"></a>
+<span class="sourceLineNo">104</span> * For the example we're just using one
qualifier.<a name="line.104"></a>
+<span class="sourceLineNo">105</span> */<a name="line.105"></a>
+<span class="sourceLineNo">106</span> private static final byte[] QUAL =
Bytes.toBytes("test");<a name="line.106"></a>
+<span class="sourceLineNo">107</span><a name="line.107"></a>
+<span class="sourceLineNo">108</span> private final ExecutorService
internalPool;<a name="line.108"></a>
+<span class="sourceLineNo">109</span><a name="line.109"></a>
+<span class="sourceLineNo">110</span> private final int threads;<a
name="line.110"></a>
+<span class="sourceLineNo">111</span><a name="line.111"></a>
+<span class="sourceLineNo">112</span> public MultiThreadedClientExample()
throws IOException {<a name="line.112"></a>
+<span class="sourceLineNo">113</span> // Base number of threads.<a
name="line.113"></a>
+<span class="sourceLineNo">114</span> // This represents the number of
threads you application has<a name="line.114"></a>
+<span class="sourceLineNo">115</span> // that can be interacting with an
hbase client.<a name="line.115"></a>
+<span class="sourceLineNo">116</span> this.threads =
Runtime.getRuntime().availableProcessors() * 4;<a name="line.116"></a>
+<span class="sourceLineNo">117</span><a name="line.117"></a>
+<span class="sourceLineNo">118</span> // Daemon threads are great for
things that get shut down.<a name="line.118"></a>
+<span class="sourceLineNo">119</span> ThreadFactory threadFactory = new
ThreadFactoryBuilder()<a name="line.119"></a>
+<span class="sourceLineNo">120</span>
.setDaemon(true).setNameFormat("internal-pol-%d").build();<a
name="line.120"></a>
+<span class="sourceLineNo">121</span><a name="line.121"></a>
<span class="sourceLineNo">122</span><a name="line.122"></a>
-<span class="sourceLineNo">123</span> @Override<a name="line.123"></a>
-<span class="sourceLineNo">124</span> public int run(String[] args) throws
Exception {<a name="line.124"></a>
+<span class="sourceLineNo">123</span> this.internalPool =
Executors.newFixedThreadPool(threads, threadFactory);<a name="line.123"></a>
+<span class="sourceLineNo">124</span> }<a name="line.124"></a>
<span class="sourceLineNo">125</span><a name="line.125"></a>
-<span class="sourceLineNo">126</span> if (args.length < 1 || args.length
> 2) {<a name="line.126"></a>
-<span class="sourceLineNo">127</span> System.out.println("Usage: " +
this.getClass().getName() + " tableName [num_operations]");<a
name="line.127"></a>
-<span class="sourceLineNo">128</span> return -1;<a name="line.128"></a>
-<span class="sourceLineNo">129</span> }<a name="line.129"></a>
-<span class="sourceLineNo">130</span><a name="line.130"></a>
-<span class="sourceLineNo">131</span> final TableName tableName =
TableName.valueOf(args[0]);<a name="line.131"></a>
-<span class="sourceLineNo">132</span> int numOperations =
DEFAULT_NUM_OPERATIONS;<a name="line.132"></a>
+<span class="sourceLineNo">126</span> @Override<a name="line.126"></a>
+<span class="sourceLineNo">127</span> public int run(String[] args) throws
Exception {<a name="line.127"></a>
+<span class="sourceLineNo">128</span><a name="line.128"></a>
+<span class="sourceLineNo">129</span> if (args.length < 1 || args.length
> 2) {<a name="line.129"></a>
+<span class="sourceLineNo">130</span> System.out.println("Usage: " +
this.getClass().getName() + " tableName [num_operations]");<a
name="line.130"></a>
+<span class="sourceLineNo">131</span> return -1;<a name="line.131"></a>
+<span class="sourceLineNo">132</span> }<a name="line.132"></a>
<span class="sourceLineNo">133</span><a name="line.133"></a>
-<span class="sourceLineNo">134</span> // the second arg is the number of
operations to send.<a name="line.134"></a>
-<span class="sourceLineNo">135</span> if (args.length == 2) {<a
name="line.135"></a>
-<span class="sourceLineNo">136</span> numOperations =
Integer.parseInt(args[1]);<a name="line.136"></a>
-<span class="sourceLineNo">137</span> }<a name="line.137"></a>
-<span class="sourceLineNo">138</span><a name="line.138"></a>
-<span class="sourceLineNo">139</span> // Threads for the client only.<a
name="line.139"></a>
-<span class="sourceLineNo">140</span> //<a name="line.140"></a>
-<span class="sourceLineNo">141</span> // We don't want to mix hbase and
business logic.<a name="line.141"></a>
-<span class="sourceLineNo">142</span> //<a name="line.142"></a>
-<span class="sourceLineNo">143</span> ExecutorService service = new
ForkJoinPool(threads * 2);<a name="line.143"></a>
-<span class="sourceLineNo">144</span><a name="line.144"></a>
-<span class="sourceLineNo">145</span> // Create two different connections
showing how it's possible to<a name="line.145"></a>
-<span class="sourceLineNo">146</span> // separate different types of
requests onto different connections<a name="line.146"></a>
-<span class="sourceLineNo">147</span> final Connection writeConnection =
ConnectionFactory.createConnection(getConf(), service);<a name="line.147"></a>
-<span class="sourceLineNo">148</span> final Connection readConnection =
ConnectionFactory.createConnection(getConf(), service);<a name="line.148"></a>
-<span class="sourceLineNo">149</span><a name="line.149"></a>
-<span class="sourceLineNo">150</span> // At this point the entire cache for
the region locations is full.<a name="line.150"></a>
-<span class="sourceLineNo">151</span> // Only do this if the number of
regions in a table is easy to fit into memory.<a name="line.151"></a>
-<span class="sourceLineNo">152</span> //<a name="line.152"></a>
-<span class="sourceLineNo">153</span> // If you are interacting with more
than 25k regions on a client then it's probably not good<a name="line.153"></a>
-<span class="sourceLineNo">154</span> // to do this at all.<a
name="line.154"></a>
-<span class="sourceLineNo">155</span> warmUpConnectionCache(readConnection,
tableName);<a name="line.155"></a>
-<span class="sourceLineNo">156</span>
warmUpConnectionCache(writeConnection, tableName);<a name="line.156"></a>
-<span class="sourceLineNo">157</span><a name="line.157"></a>
-<span class="sourceLineNo">158</span> List<Future<Boolean>>
futures = new ArrayList<>(numOperations);<a name="line.158"></a>
-<span class="sourceLineNo">159</span> for (int i = 0; i < numOperations;
i++) {<a name="line.159"></a>
-<span class="sourceLineNo">160</span> double r =
ThreadLocalRandom.current().nextDouble();<a name="line.160"></a>
-<span class="sourceLineNo">161</span> Future<Boolean> f;<a
name="line.161"></a>
-<span class="sourceLineNo">162</span><a name="line.162"></a>
-<span class="sourceLineNo">163</span> // For the sake of generating some
synthetic load this queues<a name="line.163"></a>
-<span class="sourceLineNo">164</span> // some different callables.<a
name="line.164"></a>
-<span class="sourceLineNo">165</span> // These callables are meant to
represent real work done by your application.<a name="line.165"></a>
-<span class="sourceLineNo">166</span> if (r < .30) {<a
name="line.166"></a>
-<span class="sourceLineNo">167</span> f = internalPool.submit(new
WriteExampleCallable(writeConnection, tableName));<a name="line.167"></a>
-<span class="sourceLineNo">168</span> } else if (r < .50) {<a
name="line.168"></a>
-<span class="sourceLineNo">169</span> f = internalPool.submit(new
SingleWriteExampleCallable(writeConnection, tableName));<a name="line.169"></a>
-<span class="sourceLineNo">170</span> } else {<a name="line.170"></a>
-<span class="sourceLineNo">171</span> f = internalPool.submit(new
ReadExampleCallable(writeConnection, tableName));<a name="line.171"></a>
-<span class="sourceLineNo">172</span> }<a name="line.172"></a>
-<span class="sourceLineNo">173</span> futures.add(f);<a
name="line.173"></a>
-<span class="sourceLineNo">174</span> }<a name="line.174"></a>
-<span class="sourceLineNo">175</span><a name="line.175"></a>
-<span class="sourceLineNo">176</span> // Wait a long time for all the
reads/writes to complete<a name="line.176"></a>
-<span class="sourceLineNo">177</span> for (Future<Boolean> f :
futures) {<a name="line.177"></a>
-<span class="sourceLineNo">178</span> f.get(10, TimeUnit.MINUTES);<a
name="line.178"></a>
-<span class="sourceLineNo">179</span> }<a name="line.179"></a>
-<span class="sourceLineNo">180</span><a name="line.180"></a>
-<span class="sourceLineNo">181</span> // Clean up after our selves for
cleanliness<a name="line.181"></a>
-<span class="sourceLineNo">182</span> internalPool.shutdownNow();<a
name="line.182"></a>
-<span class="sourceLineNo">183</span> service.shutdownNow();<a
name="line.183"></a>
-<span class="sourceLineNo">184</span> return 0;<a name="line.184"></a>
-<span class="sourceLineNo">185</span> }<a name="line.185"></a>
-<span class="sourceLineNo">186</span><a name="line.186"></a>
-<span class="sourceLineNo">187</span> private void
warmUpConnectionCache(Connection connection, TableName tn) throws IOException
{<a name="line.187"></a>
-<span class="sourceLineNo">188</span> try (RegionLocator locator =
connection.getRegionLocator(tn)) {<a name="line.188"></a>
-<span class="sourceLineNo">189</span> LOG.info(<a name="line.189"></a>
-<span class="sourceLineNo">190</span> "Warmed up region location
cache for " + tn<a name="line.190"></a>
-<span class="sourceLineNo">191</span> + " got " +
locator.getAllRegionLocations().size());<a name="line.191"></a>
-<span class="sourceLineNo">192</span> }<a name="line.192"></a>
-<span class="sourceLineNo">193</span> }<a name="line.193"></a>
-<span class="sourceLineNo">194</span><a name="line.194"></a>
-<span class="sourceLineNo">195</span> /**<a name="line.195"></a>
-<span class="sourceLineNo">196</span> * Class that will show how to send
batches of puts at the same time.<a name="line.196"></a>
-<span class="sourceLineNo">197</span> */<a name="line.197"></a>
-<span class="sourceLineNo">198</span> public static class
WriteExampleCallable implements Callable<Boolean> {<a name="line.198"></a>
-<span class="sourceLineNo">199</span> private final Connection
connection;<a name="line.199"></a>
-<span class="sourceLineNo">200</span> private final TableName tableName;<a
name="line.200"></a>
-<span class="sourceLineNo">201</span><a name="line.201"></a>
-<span class="sourceLineNo">202</span> public
WriteExampleCallable(Connection connection, TableName tableName) {<a
name="line.202"></a>
-<span class="sourceLineNo">203</span> this.connection = connection;<a
name="line.203"></a>
-<span class="sourceLineNo">204</span> this.tableName = tableName;<a
name="line.204"></a>
-<span class="sourceLineNo">205</span> }<a name="line.205"></a>
-<span class="sourceLineNo">206</span><a name="line.206"></a>
-<span class="sourceLineNo">207</span> @Override<a name="line.207"></a>
-<span class="sourceLineNo">208</span> public Boolean call() throws
Exception {<a name="line.208"></a>
+<span class="sourceLineNo">134</span> final TableName tableName =
TableName.valueOf(args[0]);<a name="line.134"></a>
+<span class="sourceLineNo">135</span> int numOperations =
DEFAULT_NUM_OPERATIONS;<a name="line.135"></a>
+<span class="sourceLineNo">136</span><a name="line.136"></a>
+<span class="sourceLineNo">137</span> // the second arg is the number of
operations to send.<a name="line.137"></a>
+<span class="sourceLineNo">138</span> if (args.length == 2) {<a
name="line.138"></a>
+<span class="sourceLineNo">139</span> numOperations =
Integer.parseInt(args[1]);<a name="line.139"></a>
+<span class="sourceLineNo">140</span> }<a name="line.140"></a>
+<span class="sourceLineNo">141</span><a name="line.141"></a>
+<span class="sourceLineNo">142</span> // Threads for the client only.<a
name="line.142"></a>
+<span class="sourceLineNo">143</span> //<a name="line.143"></a>
+<span class="sourceLineNo">144</span> // We don't want to mix hbase and
business logic.<a name="line.144"></a>
+<span class="sourceLineNo">145</span> //<a name="line.145"></a>
+<span class="sourceLineNo">146</span> ExecutorService service = new
ForkJoinPool(threads * 2);<a name="line.146"></a>
+<span class="sourceLineNo">147</span><a name="line.147"></a>
+<span class="sourceLineNo">148</span> // Create two different connections
showing how it's possible to<a name="line.148"></a>
+<span class="sourceLineNo">149</span> // separate different types of
requests onto different connections<a name="line.149"></a>
+<span class="sourceLineNo">150</span> final Connection writeConnection =
ConnectionFactory.createConnection(getConf(), service);<a name="line.150"></a>
+<span class="sourceLineNo">151</span> final Connection readConnection =
ConnectionFactory.createConnection(getConf(), service);<a name="line.151"></a>
+<span class="sourceLineNo">152</span><a name="line.152"></a>
+<span class="sourceLineNo">153</span> // At this point the entire cache for
the region locations is full.<a name="line.153"></a>
+<span class="sourceLineNo">154</span> // Only do this if the number of
regions in a table is easy to fit into memory.<a name="line.154"></a>
+<span class="sourceLineNo">155</span> //<a name="line.155"></a>
+<span class="sourceLineNo">156</span> // If you are interacting with more
than 25k regions on a client then it's probably not good<a name="line.156"></a>
+<span class="sourceLineNo">157</span> // to do this at all.<a
name="line.157"></a>
+<span class="sourceLineNo">158</span> warmUpConnectionCache(readConnection,
tableName);<a name="line.158"></a>
+<span class="sourceLineNo">159</span>
warmUpConnectionCache(writeConnection, tableName);<a name="line.159"></a>
+<span class="sourceLineNo">160</span><a name="line.160"></a>
+<span class="sourceLineNo">161</span> List<Future<Boolean>>
futures = new ArrayList<>(numOperations);<a name="line.161"></a>
+<span class="sourceLineNo">162</span> for (int i = 0; i < numOperations;
i++) {<a name="line.162"></a>
+<span class="sourceLineNo">163</span> double r =
ThreadLocalRandom.current().nextDouble();<a name="line.163"></a>
+<span class="sourceLineNo">164</span> Future<Boolean> f;<a
name="line.164"></a>
+<span class="sourceLineNo">165</span><a name="line.165"></a>
+<span class="sourceLineNo">166</span> // For the sake of generating some
synthetic load this queues<a name="line.166"></a>
+<span class="sourceLineNo">167</span> // some different callables.<a
name="line.167"></a>
+<span class="sourceLineNo">168</span> // These callables are meant to
represent real work done by your application.<a name="line.168"></a>
+<span class="sourceLineNo">169</span> if (r < .30) {<a
name="line.169"></a>
+<span class="sourceLineNo">170</span> f = internalPool.submit(new
WriteExampleCallable(writeConnection, tableName));<a name="line.170"></a>
+<span class="sourceLineNo">171</span> } else if (r < .50) {<a
name="line.171"></a>
+<span class="sourceLineNo">172</span> f = internalPool.submit(new
SingleWriteExampleCallable(writeConnection, tableName));<a name="line.172"></a>
+<span class="sourceLineNo">173</span> } else {<a name="line.173"></a>
+<span class="sourceLineNo">174</span> f = internalPool.submit(new
ReadExampleCallable(writeConnection, tableName));<a name="line.174"></a>
+<span class="sourceLineNo">175</span> }<a name="line.175"></a>
+<span class="sourceLineNo">176</span> futures.add(f);<a
name="line.176"></a>
+<span class="sourceLineNo">177</span> }<a name="line.177"></a>
+<span class="sourceLineNo">178</span><a name="line.178"></a>
+<span class="sourceLineNo">179</span> // Wait a long time for all the
reads/writes to complete<a name="line.179"></a>
+<span class="sourceLineNo">180</span> for (Future<Boolean> f :
futures) {<a name="line.180"></a>
+<span class="sourceLineNo">181</span> f.get(10, TimeUnit.MINUTES);<a
name="line.181"></a>
+<span class="sourceLineNo">182</span> }<a name="line.182"></a>
+<span class="sourceLineNo">183</span><a name="line.183"></a>
+<span class="sourceLineNo">184</span> // Clean up after our selves for
cleanliness<a name="line.184"></a>
+<span class="sourceLineNo">185</span> internalPool.shutdownNow();<a
name="line.185"></a>
+<span class="sourceLineNo">186</span> service.shutdownNow();<a
name="line.186"></a>
+<span class="sourceLineNo">187</span> return 0;<a name="line.187"></a>
+<span class="sourceLineNo">188</span> }<a name="line.188"></a>
+<span class="sourceLineNo">189</span><a name="line.189"></a>
+<span class="sourceLineNo">190</span> private void
warmUpConnectionCache(Connection connection, TableName tn) throws IOException
{<a name="line.190"></a>
+<span class="sourceLineNo">191</span> try (RegionLocator locator =
connection.getRegionLocator(tn)) {<a name="line.191"></a>
+<span class="sourceLineNo">192</span> LOG.info(<a name="line.192"></a>
+<span class="sourceLineNo">193</span> "Warmed up region location
cache for " + tn<a name="line.193"></a>
+<span class="sourceLineNo">194</span> + " got " +
locator.getAllRegionLocations().size());<a name="line.194"></a>
+<span class="sourceLineNo">195</span> }<a name="line.195"></a>
+<span class="sourceLineNo">196</span> }<a name="line.196"></a>
+<span class="sourceLineNo">197</span><a name="line.197"></a>
+<span class="sourceLineNo">198</span> /**<a name="line.198"></a>
+<span class="sourceLineNo">199</span> * Class that will show how to send
batches of puts at the same time.<a name="line.199"></a>
+<span class="sourceLineNo">200</span> */<a name="line.200"></a>
+<span class="sourceLineNo">201</span> public static class
WriteExampleCallable implements Callable<Boolean> {<a name="line.201"></a>
+<span class="sourceLineNo">202</span> private final Connection
connection;<a name="line.202"></a>
+<span class="sourceLineNo">203</span> private final TableName tableName;<a
name="line.203"></a>
+<span class="sourceLineNo">204</span><a name="line.204"></a>
+<span class="sourceLineNo">205</span> public
WriteExampleCallable(Connection connection, TableName tableName) {<a
name="line.205"></a>
+<span class="sourceLineNo">206</span> this.connection = connection;<a
name="line.206"></a>
+<span class="sourceLineNo">207</span> this.tableName = tableName;<a
name="line.207"></a>
+<span class="sourceLineNo">208</span> }<a name="line.208"></a>
<span class="sourceLineNo">209</span><a name="line.209"></a>
-<span class="sourceLineNo">210</span> // Table implements Closable so we
use the try with resource structure here.<a name="line.210"></a>
-<span class="sourceLineNo">211</span> //
https://docs.oracle.com/javase/tutorial/essential/exceptions/tryResourceClose.html<a
name="line.211"></a>
-<span class="sourceLineNo">212</span> try (Table t =
connection.getTable(tableName)) {<a name="line.212"></a>
-<span class="sourceLineNo">213</span> byte[] value =
Bytes.toBytes(Double.toString(ThreadLocalRandom.current().nextDouble()));<a
name="line.213"></a>
-<span class="sourceLineNo">214</span> int rows = 30;<a
name="line.214"></a>
-<span class="sourceLineNo">215</span><a name="line.215"></a>
-<span class="sourceLineNo">216</span> // Array to put the batch<a
name="line.216"></a>
-<span class="sourceLineNo">217</span> ArrayList<Put> puts = new
ArrayList<>(rows);<a name="line.217"></a>
-<span class="sourceLineNo">218</span> for (int i = 0; i < 30; i++)
{<a name="line.218"></a>
-<span class="sourceLineNo">219</span> byte[] rk =
Bytes.toBytes(ThreadLocalRandom.current().nextLong());<a name="line.219"></a>
-<span class="sourceLineNo">220</span> Put p = new Put(rk);<a
name="line.220"></a>
-<span class="sourceLineNo">221</span> p.addImmutable(FAMILY, QUAL,
value);<a name="line.221"></a>
-<span class="sourceLineNo">222</span> puts.add(p);<a
name="line.222"></a>
-<span class="sourceLineNo">223</span> }<a name="line.223"></a>
-<span class="sourceLineNo">224</span><a name="line.224"></a>
-<span class="sourceLineNo">225</span> // now that we've assembled the
batch it's time to push it to hbase.<a name="line.225"></a>
-<span class="sourceLineNo">226</span> t.put(puts);<a
name="line.226"></a>
-<span class="sourceLineNo">227</span> }<a name="line.227"></a>
-<span class="sourceLineNo">228</span> return true;<a name="line.228"></a>
-<span class="sourceLineNo">229</span> }<a name="line.229"></a>
-<span class="sourceLineNo">230</span> }<a name="line.230"></a>
-<span class="sourceLineNo">231</span><a name="line.231"></a>
-<span class="sourceLineNo">232</span> /**<a name="line.232"></a>
-<span class="sourceLineNo">233</span> * Class to show how to send a single
put.<a name="line.233"></a>
-<span class="sourceLineNo">234</span> */<a name="line.234"></a>
-<span class="sourceLineNo">235</span> public static class
SingleWriteExampleCallable implements Callable<Boolean> {<a
name="line.235"></a>
-<span class="sourceLineNo">236</span> private final Connection
connection;<a name="line.236"></a>
-<span class="sourceLineNo">237</span> private final TableName tableName;<a
name="line.237"></a>
-<span class="sourceLineNo">238</span><a name="line.238"></a>
-<span class="sourceLineNo">239</span> public
SingleWriteExampleCallable(Connection connection, TableName tableName) {<a
name="line.239"></a>
-<span class="sourceLineNo">240</span> this.connection = connection;<a
name="line.240"></a>
-<span class="sourceLineNo">241</span> this.tableName = tableName;<a
name="line.241"></a>
-<span class="sourceLineNo">242</span> }<a name="line.242"></a>
-<span class="sourceLineNo">243</span><a name="line.243"></a>
-<span class="sourceLineNo">244</span> @Override<a name="line.244"></a>
-<span class="sourceLineNo">245</span> public Boolean call() throws
Exception {<a name="line.245"></a>
-<span class="sourceLineNo">246</span> try (Table t =
connection.getTable(tableName)) {<a name="line.246"></a>
-<span class="sourceLineNo">247</span><a name="line.247"></a>
-<span class="sourceLineNo">248</span> byte[] value =
Bytes.toBytes(Double.toString(ThreadLocalRandom.current().nextDouble()));<a
name="line.248"></a>
-<span class="sourceLineNo">249</span> byte[] rk =
Bytes.toBytes(ThreadLocalRandom.current().nextLong());<a name="line.249"></a>
-<span class="sourceLineNo">250</span> Put p = new Put(rk);<a
name="line.250"></a>
-<span class="sourceLineNo">251</span> p.addImmutable(FAMILY, QUAL,
value);<a name="line.251"></a>
-<span class="sourceLineNo">252</span> t.put(p);<a name="line.252"></a>
-<span class="sourceLineNo">253</span> }<a name="line.253"></a>
-<span class="sourceLineNo">254</span> return true;<a name="line.254"></a>
-<span class="sourceLineNo">255</span> }<a name="line.255"></a>
-<span class="sourceLineNo">256</span> }<a name="line.256"></a>
+<span class="sourceLineNo">210</span> @Override<a name="line.210"></a>
+<span class="sourceLineNo">211</span> public Boolean call() throws
Exception {<a name="line.211"></a>
+<span class="sourceLineNo">212</span><a name="line.212"></a>
+<span class="sourceLineNo">213</span> // Table implements Closable so we
use the try with resource structure here.<a name="line.213"></a>
+<span class="sourceLineNo">214</span> //
https://docs.oracle.com/javase/tutorial/essential/exceptions/tryResourceClose.html<a
name="line.214"></a>
+<span class="sourceLineNo">215</span> try (Table t =
connection.getTable(tableName)) {<a name="line.215"></a>
+<span class="sourceLineNo">216</span> byte[] value =
Bytes.toBytes(Double.toString(ThreadLocalRandom.current().nextDouble()));<a
name="line.216"></a>
+<span class="sourceLineNo">217</span> int rows = 30;<a
name="line.217"></a>
+<span class="sourceLineNo">218</span><a name="line.218"></a>
+<span class="sourceLineNo">219</span> // Array to put the batch<a
name="line.219"></a>
+<span class="sourceLineNo">220</span> ArrayList<Put> puts = new
ArrayList<>(rows);<a name="line.220"></a>
+<span class="sourceLineNo">221</span> for (int i = 0; i < 30; i++)
{<a name="line.221"></a>
+<span class="sourceLineNo">222</span> byte[] rk =
Bytes.toBytes(ThreadLocalRandom.current().nextLong());<a name="line.222"></a>
+<span class="sourceLineNo">223</span> Put p = new Put(rk);<a
name="line.223"></a>
+<span class="sourceLineNo">224</span>
p.add(CellBuilderFactory.create(CellBuilderType.SHALLOW_COPY)<a
name="line.224"></a>
+<span class="sourceLineNo">225</span> .setRow(rk)<a
name="line.225"></a>
+<span class="sourceLineNo">226</span> .setFamily(FAMILY)<a
name="line.226"></a>
+<span class="sourceLineNo">227</span> .setQualifier(QUAL)<a
name="line.227"></a>
+<span class="sourceLineNo">228</span>
.setTimestamp(p.getTimeStamp())<a name="line.228"></a>
+<span class="sourceLineNo">229</span>
.setType(CellBuilder.DataType.Put)<a name="line.229"></a>
+<span class="sourceLineNo">230</span> .setValue(value)<a
name="line.230"></a>
+<span class="sourceLineNo">231</span> .build());<a
name="line.231"></a>
+<span class="sourceLineNo">232</span> puts.add(p);<a
name="line.232"></a>
+<span class="sourceLineNo">233</span> }<a name="line.233"></a>
+<span class="sourceLineNo">234</span><a name="line.234"></a>
+<span class="sourceLineNo">235</span> // now that we've assembled the
batch it's time to push it to hbase.<a name="line.235"></a>
+<span class="sourceLineNo">236</span> t.put(puts);<a
name="line.236"></a>
+<span class="sourceLineNo">237</span> }<a name="line.237"></a>
+<span class="sourceLineNo">238</span> return true;<a name="line.238"></a>
+<span class="sourceLineNo">239</span> }<a name="line.239"></a>
+<span class="sourceLineNo">240</span> }<a name="line.240"></a>
+<span class="sourceLineNo">241</span><a name="line.241"></a>
+<span class="sourceLineNo">242</span> /**<a name="line.242"></a>
+<span class="sourceLineNo">243</span> * Class to show how to send a single
put.<a name="line.243"></a>
+<span class="sourceLineNo">244</span> */<a name="line.244"></a>
+<span class="sourceLineNo">245</span> public static class
SingleWriteExampleCallable implements Callable<Boolean> {<a
name="line.245"></a>
+<span class="sourceLineNo">246</span> private final Connection
connection;<a name="line.246"></a>
+<span class="sourceLineNo">247</span> private final TableName tableName;<a
name="line.247"></a>
+<span class="sourceLineNo">248</span><a name="line.248"></a>
+<span class="sourceLineNo">249</span> public
SingleWriteExampleCallable(Connection connection, TableName tableName) {<a
name="line.249"></a>
+<span class="sourceLineNo">250</span> this.connection = connection;<a
name="line.250"></a>
+<span class="sourceLineNo">251</span> this.tableName = tableName;<a
name="line.251"></a>
+<span class="sourceLineNo">252</span> }<a name="line.252"></a>
+<span class="sourceLineNo">253</span><a name="line.253"></a>
+<span class="sourceLineNo">254</span> @Override<a name="line.254"></a>
+<span class="sourceLineNo">255</span> public Boolean call() throws
Exception {<a name="line.255"></a>
+<span class="sourceLineNo">256</span> try (Table t =
connection.getTable(tableName)) {<a name="line.256"></a>
<span class="sourceLineNo">257</span><a name="line.257"></a>
-<span class="sourceLineNo">258</span><a name="line.258"></a>
-<span class="sourceLineNo">259</span> /**<a name="line.259"></a>
-<span class="sourceLineNo">260</span> * Class to show how to scan some rows
starting at a random location.<a name="line.260"></a>
-<span class="sourceLineNo">261</span> */<a name="line.261"></a>
-<span class="sourceLineNo">262</span> public static class ReadExampleCallable
implements Callable<Boolean> {<a name="line.262"></a>
-<span class="sourceLineNo">263</span> private final Connection
connection;<a name="line.263"></a>
-<span class="sourceLineNo">264</span> private final TableName tableName;<a
name="line.264"></a>
-<span class="sourceLineNo">265</span><a name="line.265"></a>
-<span class="sourceLineNo">266</span> public ReadExampleCallable(Connection
connection, TableName tableName) {<a name="line.266"></a>
-<span class="sourceLineNo">267</span> this.connection = connection;<a
name="line.267"></a>
-<span class="sourceLineNo">268</span> this.tableName = tableName;<a
name="line.268"></a>
-<span class="sourceLineNo">269</span> }<a name="line.269"></a>
-<span class="sourceLineNo">270</span><a name="line.270"></a>
-<span class="sourceLineNo">271</span> @Override<a name="line.271"></a>
-<span class="sourceLineNo">272</span> public Boolean call() throws
Exception {<a name="line.272"></a>
-<span class="sourceLineNo">273</span><a name="line.273"></a>
-<span class="sourceLineNo">274</span> // total length in bytes of all
read rows.<a name="line.274"></a>
-<span class="sourceLineNo">275</span> int result = 0;<a
name="line.275"></a>
-<span class="sourceLineNo">276</span><a name="line.276"></a>
-<span class="sourceLineNo">277</span> // Number of rows the scan will
read before being considered done.<a name="line.277"></a>
-<span class="sourceLineNo">278</span> int toRead = 100;<a
name="line.278"></a>
-<span class="sourceLineNo">279</span> try (Table t =
connection.getTable(tableName)) {<a name="line.279"></a>
-<span class="sourceLineNo">280</span> byte[] rk =
Bytes.toBytes(ThreadLocalRandom.current().nextLong());<a name="line.280"></a>
-<span class="sourceLineNo">281</span> Scan s = new Scan(rk);<a
name="line.281"></a>
+<span class="sourceLineNo">258</span> byte[] value =
Bytes.toBytes(Double.toString(ThreadLocalRandom.current().nextDouble()));<a
name="line.258"></a>
+<span class="sourceLineNo">259</span> byte[] rk =
Bytes.toBytes(ThreadLocalRandom.current().nextLong());<a name="line.259"></a>
+<span class="sourceLineNo">260</span> Put p = new Put(rk);<a
name="line.260"></a>
+<span class="sourceLineNo">261</span>
p.add(CellBuilderFactory.create(CellBuilderType.SHALLOW_COPY)<a
name="line.261"></a>
+<span class="sourceLineNo">262</span> .setRow(rk)<a
name="line.262"></a>
+<span class="sourceLineNo">263</span> .setFamily(FAMILY)<a
name="line.263"></a>
+<span class="sourceLineNo">264</span> .setQualifier(QUAL)<a
name="line.264"></a>
+<span class="sourceLineNo">265</span>
.setTimestamp(p.getTimeStamp())<a name="line.265"></a>
+<span class="sourceLineNo">266</span>
.setType(CellBuilder.DataType.Put)<a name="line.266"></a>
+<span class="sourceLineNo">267</span> .setValue(value)<a
name="line.267"></a>
+<span class="sourceLineNo">268</span> .build());<a
name="line.268"></a>
+<span class="sourceLineNo">269</span> t.put(p);<a name="line.269"></a>
+<span class="sourceLineNo">270</span> }<a name="line.270"></a>
+<span class="sourceLineNo">271</span> return true;<a name="line.271"></a>
+<span class="sourceLineNo">272</span> }<a name="line.272"></a>
+<span class="sourceLineNo">273</span> }<a name="line.273"></a>
+<span class="sourceLineNo">274</span><a name="line.274"></a>
+<span class="sourceLineNo">275</span><a name="line.275"></a>
+<span class="sourceLineNo">276</span> /**<a name="line.276"></a>
+<span class="sourceLineNo">277</span> * Class to show how to scan some rows
starting at a random location.<a name="line.277"></a>
+<span class="sourceLineNo">278</span> */<a name="line.278"></a>
+<span class="sourceLineNo">279</span> public static class ReadExampleCallable
implements Callable<Boolean> {<a name="line.279"></a>
+<span class="sourceLineNo">280</span> private final Connection
connection;<a name="line.280"></a>
+<span class="sourceLineNo">281</span> private final TableName tableName;<a
name="line.281"></a>
<span class="sourceLineNo">282</span><a name="line.282"></a>
-<span class="sourceLineNo">283</span> // This filter will keep the
values from being sent accross the wire.<a name="line.283"></a>
-<span class="sourceLineNo">284</span> // This is good for counting or
other scans that are checking for<a name="line.284"></a>
-<span class="sourceLineNo">285</span> // existence and don't rely on
the value.<a name="line.285"></a>
-<span class="sourceLineNo">286</span> s.setFilter(new
KeyOnlyFilter());<a name="line.286"></a>
+<span class="sourceLineNo">283</span> public ReadExampleCallable(Connection
connection, TableName tableName) {<a name="line.283"></a>
+<span class="sourceLineNo">284</span> this.connection = connection;<a
name="line.284"></a>
+<span class="sourceLineNo">285</span> this.tableName = tableName;<a
name="line.285"></a>
+<span class="sourceLineNo">286</span> }<a name="line.286"></a>
<span class="sourceLineNo">287</span><a name="line.287"></a>
-<span class="sourceLineNo">288</span> // Don't go back to the server
for every single row.<a name="line.288"></a>
-<span class="sourceLineNo">289</span> // We know these rows are small.
So ask for 20 at a time.<a name="line.289"></a>
-<span class="sourceLineNo">290</span> // This would be application
specific.<a name="line.290"></a>
-<span class="sourceLineNo">291</span> //<a name="line.291"></a>
-<span class="sourceLineNo">292</span> // The goal is to reduce round
trips but asking for too<a name="line.292"></a>
-<span class="sourceLineNo">293</span> // many rows can lead to GC
problems on client and server sides.<a name="line.293"></a>
-<span class="sourceLineNo">294</span> s.setCaching(20);<a
name="line.294"></a>
-<span class="sourceLineNo">295</span><a name="line.295"></a>
-<span class="sourceLineNo">296</span> // Don't use the cache. While
this is a silly test program it's still good to be<a name="line.296"></a>
-<span class="sourceLineNo">297</span> // explicit that scans normally
don't use the block cache.<a name="line.297"></a>
-<span class="sourceLineNo">298</span> s.setCacheBlocks(false);<a
name="line.298"></a>
+<span class="sourceLineNo">288</span> @Override<a name="line.288"></a>
+<span class="sourceLineNo">289</span> public Boolean call() throws
Exception {<a name="line.289"></a>
+<span class="sourceLineNo">290</span><a name="line.290"></a>
+<span class="sourceLineNo">291</span> // total length in bytes of all
read rows.<a name="line.291"></a>
+<span class="sourceLineNo">292</span> int result = 0;<a
name="line.292"></a>
+<span class="sourceLineNo">293</span><a name="line.293"></a>
+<span class="sourceLineNo">294</span> // Number of rows the scan will
read before being considered done.<a name="line.294"></a>
+<span class="sourceLineNo">295</span> int toRead = 100;<a
name="line.295"></a>
+<span class="sourceLineNo">296</span> try (Table t =
connection.getTable(tableName)) {<a name="line.296"></a>
+<span class="sourceLineNo">297</span> byte[] rk =
Bytes.toBytes(ThreadLocalRandom.current().nextLong());<a name="line.297"></a>
+<span class="sourceLineNo">298</span> Scan s = new Scan(rk);<a
name="line.298"></a>
<span class="sourceLineNo">299</span><a name="line.299"></a>
-<span class="sourceLineNo">300</span> // Open up the scanner and close
it automatically when done.<a name="line.300"></a>
-<span class="sourceLineNo">301</span> try (ResultScanner rs =
t.getScanner(s)) {<a name="line.301"></a>
-<span class="sourceLineNo">302</span><a name="line.302"></a>
-<span class="sourceLineNo">303</span> // Now go through rows.<a
name="line.303"></a>
-<span class="sourceLineNo">304</span> for (Result r : rs) {<a
name="line.304"></a>
-<span class="sourceLineNo">305</span> // Keep track of things size
to simulate doing some real work.<a name="line.305"></a>
-<span class="sourceLineNo">306</span> result +=
r.getRow().length;<a name="line.306"></a>
-<span class="sourceLineNo">307</span> toRead -= 1;<a
name="line.307"></a>
-<span class="sourceLineNo">308</span><a name="line.308"></a>
-<span class="sourceLineNo">309</span> // Most online applications
won't be<a name="line.309"></a>
-<span class="sourceLineNo">310</span> // reading the entire table
so this break<a name="line.310"></a>
-<span class="sourceLineNo">311</span> // simulates small to medium
size scans,<a name="line.311"></a>
-<span class="sourceLineNo">312</span> // without needing to know an
end row.<a name="line.312"></a>
-<span class="sourceLineNo">313</span> if (toRead <= 0) {<a
name="line.313"></a>
-<span class="sourceLineNo">314</span> break;<a
name="line.314"></a>
-<span class="sourceLineNo">315</span> }<a name="line.315"></a>
-<span class="sourceLineNo">316</span> }<a name="line.316"></a>
-<span class="sourceLineNo">317</span> }<a name="line.317"></a>
-<span class="sourceLineNo">318</span> }<a name="line.318"></a>
-<span class="sourceLineNo">319</span> return result > 0;<a
name="line.319"></a>
-<span class="sourceLineNo">320</span> }<a name="line.320"></a>
-<span class="sourceLineNo">321</span> }<a name="line.321"></a>
-<span class="sourceLineNo">322</span><a name="line.322"></a>
-<span class="sourceLineNo">323</span> public static void main(String[] args)
throws Exception {<a name="line.323"></a>
-<span class="sourceLineNo">324</span> ToolRunner.run(new
MultiThreadedClientExample(), args);<a name="line.324"></a>
-<span class="sourceLineNo">325</span> }<a name="line.325"></a>
-<span class="sourceLineNo">326</span>}<a name="line.326"></a>
+<span class="sourceLineNo">300</span> // This filter will keep the
values from being sent accross the wire.<a name="line.300"></a>
+<span class="sourceLineNo">301</span> // This is good for counting or
other scans that are checking for<a name="line.301"></a>
+<span class="sourceLineNo">302</span> // existence and don't rely on
the value.<a name="line.302"></a>
+<span class="sourceLineNo">303</span> s.setFilter(new
KeyOnlyFilter());<a name="line.303"></a>
+<span class="sourceLineNo">304</span><a name="line.304"></a>
+<span class="sourceLineNo">305</span> // Don't go back to the server
for every single row.<a name="line.305"></a>
+<span class="sourceLineNo">306</span> // We know these rows are small.
So ask for 20 at a time.<a name="line.306"></a>
+<span class="sourceLineNo">307</span> // This would be application
specific.<a name="line.307"></a>
+<span class="sourceLineNo">308</span> //<a name="line.308"></a>
+<span class="sourceLineNo">309</span> // The goal is to reduce round
trips but asking for too<a name="line.309"></a>
+<span class="sourceLineNo">310</span> // many rows can lead to GC
problems on client and server sides.<a name="line.310"></a>
+<span class="sourceLineNo">311</span> s.setCaching(20);<a
name="line.311"></a>
+<span class="sourceLineNo">312</span><a name="line.312"></a>
+<span class="sourceLineNo">313</span> // Don't use the cache. While
this is a silly test program it's still good to be<a name="line.313"></a>
+<span class="sourceLineNo">314</span> // explicit that scans normally
don't use the block cache.<a name="line.314"></a>
+<span class="sourceLineNo">315</span> s.setCacheBlocks(false);<a
name="line.315"></a>
+<span class="sourceLineNo">316</span><a name="line.316"></a>
+<span class="sourceLineNo">317</span> // Open up the scanner and close
it automatically when done.<a name="line.317"></a>
+<span class="sourceLineNo">318</span> try (ResultScanner rs =
t.getScanner(s)) {<a name="line.318"></a>
+<span class="sourceLineNo">319</span><a name="line.319"></a>
+<span class="sourceLineNo">320</span> // Now go through rows.<a
name="line.320"></a>
+<span class="sourceLineNo">321</span> for (Result r : rs) {<a
name="line.321"></a>
+<span class="sourceLineNo">322</span> // Keep track of things size
to simulate doing some real work.<a name="line.322"></a>
+<span class="sourceLineNo">323</span> result +=
r.getRow().length;<a name="line.323"></a>
+<span class="sourceLineNo">324</span> toRead -= 1;<a
name="line.324"></a>
+<span class="sourceLineNo">325</span><a name="line.325"></a>
+<span class="sourceLineNo">326</span> // Most online applications
won't be<a name="line.326"></a>
+<span class="sourceLineNo">327</span> // reading the entire table
so this break<a name="line.327"></a>
+<span class="sourceLineNo">328</span> // simulates small to medium
size scans,<a name="line.328"></a>
+<span class="sourceLineNo">329</span> // without needing to know an
end row.<a name="line.329"></a>
+<span class="sourceLineNo">330</span> if (toRead <= 0) {<a
name="line.330"></a>
+<span class="sourceLineNo">331</span> break;<a
name="line.331"></a>
+<span class="sourceLineNo">332</span> }<a name="line.332"></a>
+<span class="sourceLineNo">333</span> }<a name="line.333"></a>
+<span class="sourceLineNo">334</span> }<a name="line.334"></a>
+<span class="sourceLineNo">335</span> }<a name="line.335"></a>
+<span class="sourceLineNo">336</span> return result > 0;<a
name="line.336"></a>
+<span class="sourceLineNo">337</span> }<a name="line.337"></a>
+<span class="sourceLineNo">338</span> }<a name="line.338"></a>
+<span class="sourceLineNo">339</span><a name="line.339"></a>
+<span class="sourceLineNo">340</span> public static void main(String[] args)
throws Exception {<a name="line.340"></a>
+<span class="sourceLineNo">341</span> ToolRunner.run(new
MultiThreadedClientExample(), args);<a name="line.341"></a>
+<span class="sourceLineNo">342</span> }<a name="line.342"></a>
+<span class="sourceLineNo">343</span>}<a name="line.343"></a>
