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| <pre><span class="sourceLineNo">001</span>/**<a name="line.1"></a> |
| <span class="sourceLineNo">002</span> * Licensed to the Apache Software Foundation (ASF) under one<a name="line.2"></a> |
| <span class="sourceLineNo">003</span> * or more contributor license agreements. See the NOTICE file<a name="line.3"></a> |
| <span class="sourceLineNo">004</span> * distributed with this work for additional information<a name="line.4"></a> |
| <span class="sourceLineNo">005</span> * regarding copyright ownership. The ASF licenses this file<a name="line.5"></a> |
| <span class="sourceLineNo">006</span> * to you under the Apache License, Version 2.0 (the<a name="line.6"></a> |
| <span class="sourceLineNo">007</span> * "License"); you may not use this file except in compliance<a name="line.7"></a> |
| <span class="sourceLineNo">008</span> * with the License. You may obtain a copy of the License at<a name="line.8"></a> |
| <span class="sourceLineNo">009</span> *<a name="line.9"></a> |
| <span class="sourceLineNo">010</span> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.10"></a> |
| <span class="sourceLineNo">011</span> *<a name="line.11"></a> |
| <span class="sourceLineNo">012</span> * Unless required by applicable law or agreed to in writing, software<a name="line.12"></a> |
| <span class="sourceLineNo">013</span> * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.13"></a> |
| <span class="sourceLineNo">014</span> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.14"></a> |
| <span class="sourceLineNo">015</span> * See the License for the specific language governing permissions and<a name="line.15"></a> |
| <span class="sourceLineNo">016</span> * limitations under the License.<a name="line.16"></a> |
| <span class="sourceLineNo">017</span> */<a name="line.17"></a> |
| <span class="sourceLineNo">018</span>package org.apache.hadoop.hbase.regionserver;<a name="line.18"></a> |
| <span class="sourceLineNo">019</span><a name="line.19"></a> |
| <span class="sourceLineNo">020</span>import java.util.List;<a name="line.20"></a> |
| <span class="sourceLineNo">021</span><a name="line.21"></a> |
| <span class="sourceLineNo">022</span>import org.apache.hadoop.hbase.Cell;<a name="line.22"></a> |
| <span class="sourceLineNo">023</span>import org.apache.hadoop.hbase.HBaseInterfaceAudience;<a name="line.23"></a> |
| <span class="sourceLineNo">024</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.24"></a> |
| <span class="sourceLineNo">025</span>import org.apache.yetus.audience.InterfaceStability;<a name="line.25"></a> |
| <span class="sourceLineNo">026</span>import org.apache.hadoop.hbase.client.metrics.ServerSideScanMetrics;<a name="line.26"></a> |
| <span class="sourceLineNo">027</span><a name="line.27"></a> |
| <span class="sourceLineNo">028</span>/**<a name="line.28"></a> |
| <span class="sourceLineNo">029</span> * ScannerContext instances encapsulate limit tracking AND progress towards those limits during<a name="line.29"></a> |
| <span class="sourceLineNo">030</span> * invocations of {@link InternalScanner#next(java.util.List)} and<a name="line.30"></a> |
| <span class="sourceLineNo">031</span> * {@link RegionScanner#next(java.util.List)}.<a name="line.31"></a> |
| <span class="sourceLineNo">032</span> * <p><a name="line.32"></a> |
| <span class="sourceLineNo">033</span> * A ScannerContext instance should be updated periodically throughout execution whenever progress<a name="line.33"></a> |
| <span class="sourceLineNo">034</span> * towards a limit has been made. Each limit can be checked via the appropriate checkLimit method.<a name="line.34"></a> |
| <span class="sourceLineNo">035</span> * <p><a name="line.35"></a> |
| <span class="sourceLineNo">036</span> * Once a limit has been reached, the scan will stop. The invoker of<a name="line.36"></a> |
| <span class="sourceLineNo">037</span> * {@link InternalScanner#next(java.util.List)} or {@link RegionScanner#next(java.util.List)} can<a name="line.37"></a> |
| <span class="sourceLineNo">038</span> * use the appropriate check*Limit methods to see exactly which limits have been reached.<a name="line.38"></a> |
| <span class="sourceLineNo">039</span> * Alternatively, {@link #checkAnyLimitReached(LimitScope)} is provided to see if ANY limit was<a name="line.39"></a> |
| <span class="sourceLineNo">040</span> * reached<a name="line.40"></a> |
| <span class="sourceLineNo">041</span> * <p><a name="line.41"></a> |
| <span class="sourceLineNo">042</span> * {@link NoLimitScannerContext#NO_LIMIT} is an immutable static definition that can be used<a name="line.42"></a> |
| <span class="sourceLineNo">043</span> * whenever a {@link ScannerContext} is needed but limits do not need to be enforced.<a name="line.43"></a> |
| <span class="sourceLineNo">044</span> * <p><a name="line.44"></a> |
| <span class="sourceLineNo">045</span> * NOTE: It is important that this class only ever expose setter methods that can be safely skipped<a name="line.45"></a> |
| <span class="sourceLineNo">046</span> * when limits should be NOT enforced. This is because of the necessary immutability of the class<a name="line.46"></a> |
| <span class="sourceLineNo">047</span> * {@link NoLimitScannerContext}. If a setter cannot be safely skipped, the immutable nature of<a name="line.47"></a> |
| <span class="sourceLineNo">048</span> * {@link NoLimitScannerContext} will lead to incorrect behavior.<a name="line.48"></a> |
| <span class="sourceLineNo">049</span> */<a name="line.49"></a> |
| <span class="sourceLineNo">050</span>@InterfaceAudience.LimitedPrivate(HBaseInterfaceAudience.COPROC)<a name="line.50"></a> |
| <span class="sourceLineNo">051</span>@InterfaceStability.Evolving<a name="line.51"></a> |
| <span class="sourceLineNo">052</span>public class ScannerContext {<a name="line.52"></a> |
| <span class="sourceLineNo">053</span><a name="line.53"></a> |
| <span class="sourceLineNo">054</span> LimitFields limits;<a name="line.54"></a> |
| <span class="sourceLineNo">055</span> /**<a name="line.55"></a> |
| <span class="sourceLineNo">056</span> * A different set of progress fields. Only include batch, dataSize and heapSize. Compare to<a name="line.56"></a> |
| <span class="sourceLineNo">057</span> * LimitFields, ProgressFields doesn't contain time field. As we save a deadline in LimitFields,<a name="line.57"></a> |
| <span class="sourceLineNo">058</span> * so use {@link System#currentTimeMillis()} directly when check time limit.<a name="line.58"></a> |
| <span class="sourceLineNo">059</span> */<a name="line.59"></a> |
| <span class="sourceLineNo">060</span> ProgressFields progress;<a name="line.60"></a> |
| <span class="sourceLineNo">061</span><a name="line.61"></a> |
| <span class="sourceLineNo">062</span> /**<a name="line.62"></a> |
| <span class="sourceLineNo">063</span> * The state of the scanner after the invocation of {@link InternalScanner#next(java.util.List)}<a name="line.63"></a> |
| <span class="sourceLineNo">064</span> * or {@link RegionScanner#next(java.util.List)}.<a name="line.64"></a> |
| <span class="sourceLineNo">065</span> */<a name="line.65"></a> |
| <span class="sourceLineNo">066</span> NextState scannerState;<a name="line.66"></a> |
| <span class="sourceLineNo">067</span> private static final NextState DEFAULT_STATE = NextState.MORE_VALUES;<a name="line.67"></a> |
| <span class="sourceLineNo">068</span><a name="line.68"></a> |
| <span class="sourceLineNo">069</span> /**<a name="line.69"></a> |
| <span class="sourceLineNo">070</span> * Used as an indication to invocations of {@link InternalScanner#next(java.util.List)} and<a name="line.70"></a> |
| <span class="sourceLineNo">071</span> * {@link RegionScanner#next(java.util.List)} that, if true, the progress tracked within this<a name="line.71"></a> |
| <span class="sourceLineNo">072</span> * {@link ScannerContext} instance should be considered while evaluating the limits. Useful for<a name="line.72"></a> |
| <span class="sourceLineNo">073</span> * enforcing a set of limits across multiple calls (i.e. the limit may not be reached in a single<a name="line.73"></a> |
| <span class="sourceLineNo">074</span> * invocation, but any progress made should be considered in future invocations)<a name="line.74"></a> |
| <span class="sourceLineNo">075</span> * <p><a name="line.75"></a> |
| <span class="sourceLineNo">076</span> * Defaulting this value to false means that, by default, any tracked progress will be wiped clean<a name="line.76"></a> |
| <span class="sourceLineNo">077</span> * on invocations to {@link InternalScanner#next(java.util.List)} and<a name="line.77"></a> |
| <span class="sourceLineNo">078</span> * {@link RegionScanner#next(java.util.List)} and the call will be treated as though no progress<a name="line.78"></a> |
| <span class="sourceLineNo">079</span> * has been made towards the limits so far.<a name="line.79"></a> |
| <span class="sourceLineNo">080</span> * <p><a name="line.80"></a> |
| <span class="sourceLineNo">081</span> * This is an important mechanism. Users of Internal/Region scanners expect that they can define<a name="line.81"></a> |
| <span class="sourceLineNo">082</span> * some limits and then repeatedly invoke {@link InternalScanner#next(List)} or<a name="line.82"></a> |
| <span class="sourceLineNo">083</span> * {@link RegionScanner#next(List)} where each invocation respects these limits separately.<a name="line.83"></a> |
| <span class="sourceLineNo">084</span> * <p><a name="line.84"></a> |
| <span class="sourceLineNo">085</span> * For example: <pre> {@code<a name="line.85"></a> |
| <span class="sourceLineNo">086</span> * ScannerContext context = new ScannerContext.newBuilder().setBatchLimit(5).build();<a name="line.86"></a> |
| <span class="sourceLineNo">087</span> * RegionScanner scanner = ...<a name="line.87"></a> |
| <span class="sourceLineNo">088</span> * List<Cell> results = new ArrayList<Cell>();<a name="line.88"></a> |
| <span class="sourceLineNo">089</span> * while(scanner.next(results, context)) {<a name="line.89"></a> |
| <span class="sourceLineNo">090</span> * // Do something with a batch of 5 cells<a name="line.90"></a> |
| <span class="sourceLineNo">091</span> * }<a name="line.91"></a> |
| <span class="sourceLineNo">092</span> * }</pre> However, in the case of RPCs, the server wants to be able to define a set of<a name="line.92"></a> |
| <span class="sourceLineNo">093</span> * limits for a particular RPC request and have those limits respected across multiple<a name="line.93"></a> |
| <span class="sourceLineNo">094</span> * invocations. This means that the progress made towards the limits in earlier calls will be<a name="line.94"></a> |
| <span class="sourceLineNo">095</span> * saved and considered in future invocations<a name="line.95"></a> |
| <span class="sourceLineNo">096</span> */<a name="line.96"></a> |
| <span class="sourceLineNo">097</span> boolean keepProgress;<a name="line.97"></a> |
| <span class="sourceLineNo">098</span> private static boolean DEFAULT_KEEP_PROGRESS = false;<a name="line.98"></a> |
| <span class="sourceLineNo">099</span><a name="line.99"></a> |
| <span class="sourceLineNo">100</span> private Cell lastPeekedCell = null;<a name="line.100"></a> |
| <span class="sourceLineNo">101</span><a name="line.101"></a> |
| <span class="sourceLineNo">102</span> // Set this to true will have the same behavior with reaching the time limit.<a name="line.102"></a> |
| <span class="sourceLineNo">103</span> // This is used when you want to make the current RSRpcService.scan returns immediately. For<a name="line.103"></a> |
| <span class="sourceLineNo">104</span> // example, when we want to switch from pread to stream, we can only do it after the rpc call is<a name="line.104"></a> |
| <span class="sourceLineNo">105</span> // returned.<a name="line.105"></a> |
| <span class="sourceLineNo">106</span> private boolean returnImmediately;<a name="line.106"></a> |
| <span class="sourceLineNo">107</span><a name="line.107"></a> |
| <span class="sourceLineNo">108</span> /**<a name="line.108"></a> |
| <span class="sourceLineNo">109</span> * Tracks the relevant server side metrics during scans. null when metrics should not be tracked<a name="line.109"></a> |
| <span class="sourceLineNo">110</span> */<a name="line.110"></a> |
| <span class="sourceLineNo">111</span> final ServerSideScanMetrics metrics;<a name="line.111"></a> |
| <span class="sourceLineNo">112</span><a name="line.112"></a> |
| <span class="sourceLineNo">113</span> ScannerContext(boolean keepProgress, LimitFields limitsToCopy, boolean trackMetrics) {<a name="line.113"></a> |
| <span class="sourceLineNo">114</span> this.limits = new LimitFields();<a name="line.114"></a> |
| <span class="sourceLineNo">115</span> if (limitsToCopy != null) {<a name="line.115"></a> |
| <span class="sourceLineNo">116</span> this.limits.copy(limitsToCopy);<a name="line.116"></a> |
| <span class="sourceLineNo">117</span> }<a name="line.117"></a> |
| <span class="sourceLineNo">118</span><a name="line.118"></a> |
| <span class="sourceLineNo">119</span> // Progress fields are initialized to 0<a name="line.119"></a> |
| <span class="sourceLineNo">120</span> progress = new ProgressFields(0, 0, 0);<a name="line.120"></a> |
| <span class="sourceLineNo">121</span><a name="line.121"></a> |
| <span class="sourceLineNo">122</span> this.keepProgress = keepProgress;<a name="line.122"></a> |
| <span class="sourceLineNo">123</span> this.scannerState = DEFAULT_STATE;<a name="line.123"></a> |
| <span class="sourceLineNo">124</span> this.metrics = trackMetrics ? new ServerSideScanMetrics() : null;<a name="line.124"></a> |
| <span class="sourceLineNo">125</span> }<a name="line.125"></a> |
| <span class="sourceLineNo">126</span><a name="line.126"></a> |
| <span class="sourceLineNo">127</span> public boolean isTrackingMetrics() {<a name="line.127"></a> |
| <span class="sourceLineNo">128</span> return this.metrics != null;<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> /**<a name="line.131"></a> |
| <span class="sourceLineNo">132</span> * Get the metrics instance. Should only be called after a call to {@link #isTrackingMetrics()}<a name="line.132"></a> |
| <span class="sourceLineNo">133</span> * has been made to confirm that metrics are indeed being tracked.<a name="line.133"></a> |
| <span class="sourceLineNo">134</span> * @return {@link ServerSideScanMetrics} instance that is tracking metrics for this scan<a name="line.134"></a> |
| <span class="sourceLineNo">135</span> */<a name="line.135"></a> |
| <span class="sourceLineNo">136</span> public ServerSideScanMetrics getMetrics() {<a name="line.136"></a> |
| <span class="sourceLineNo">137</span> assert isTrackingMetrics();<a name="line.137"></a> |
| <span class="sourceLineNo">138</span> return this.metrics;<a name="line.138"></a> |
| <span class="sourceLineNo">139</span> }<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> * @return true if the progress tracked so far in this instance will be considered during an<a name="line.142"></a> |
| <span class="sourceLineNo">143</span> * invocation of {@link InternalScanner#next(java.util.List)} or<a name="line.143"></a> |
| <span class="sourceLineNo">144</span> * {@link RegionScanner#next(java.util.List)}. false when the progress tracked so far<a name="line.144"></a> |
| <span class="sourceLineNo">145</span> * should not be considered and should instead be wiped away via {@link #clearProgress()}<a name="line.145"></a> |
| <span class="sourceLineNo">146</span> */<a name="line.146"></a> |
| <span class="sourceLineNo">147</span> boolean getKeepProgress() {<a name="line.147"></a> |
| <span class="sourceLineNo">148</span> return keepProgress;<a name="line.148"></a> |
| <span class="sourceLineNo">149</span> }<a name="line.149"></a> |
| <span class="sourceLineNo">150</span><a name="line.150"></a> |
| <span class="sourceLineNo">151</span> void setKeepProgress(boolean keepProgress) {<a name="line.151"></a> |
| <span class="sourceLineNo">152</span> this.keepProgress = keepProgress;<a name="line.152"></a> |
| <span class="sourceLineNo">153</span> }<a name="line.153"></a> |
| <span class="sourceLineNo">154</span><a name="line.154"></a> |
| <span class="sourceLineNo">155</span> /**<a name="line.155"></a> |
| <span class="sourceLineNo">156</span> * Progress towards the batch limit has been made. Increment internal tracking of batch progress<a name="line.156"></a> |
| <span class="sourceLineNo">157</span> */<a name="line.157"></a> |
| <span class="sourceLineNo">158</span> void incrementBatchProgress(int batch) {<a name="line.158"></a> |
| <span class="sourceLineNo">159</span> int currentBatch = progress.getBatch();<a name="line.159"></a> |
| <span class="sourceLineNo">160</span> progress.setBatch(currentBatch + batch);<a name="line.160"></a> |
| <span class="sourceLineNo">161</span> }<a name="line.161"></a> |
| <span class="sourceLineNo">162</span><a name="line.162"></a> |
| <span class="sourceLineNo">163</span> /**<a name="line.163"></a> |
| <span class="sourceLineNo">164</span> * Progress towards the size limit has been made. Increment internal tracking of size progress<a name="line.164"></a> |
| <span class="sourceLineNo">165</span> */<a name="line.165"></a> |
| <span class="sourceLineNo">166</span> void incrementSizeProgress(long dataSize, long heapSize) {<a name="line.166"></a> |
| <span class="sourceLineNo">167</span> long curDataSize = progress.getDataSize();<a name="line.167"></a> |
| <span class="sourceLineNo">168</span> progress.setDataSize(curDataSize + dataSize);<a name="line.168"></a> |
| <span class="sourceLineNo">169</span> long curHeapSize = progress.getHeapSize();<a name="line.169"></a> |
| <span class="sourceLineNo">170</span> progress.setHeapSize(curHeapSize + heapSize);<a name="line.170"></a> |
| <span class="sourceLineNo">171</span> }<a name="line.171"></a> |
| <span class="sourceLineNo">172</span><a name="line.172"></a> |
| <span class="sourceLineNo">173</span> int getBatchProgress() {<a name="line.173"></a> |
| <span class="sourceLineNo">174</span> return progress.getBatch();<a name="line.174"></a> |
| <span class="sourceLineNo">175</span> }<a name="line.175"></a> |
| <span class="sourceLineNo">176</span><a name="line.176"></a> |
| <span class="sourceLineNo">177</span> long getDataSizeProgress() {<a name="line.177"></a> |
| <span class="sourceLineNo">178</span> return progress.getDataSize();<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> long getHeapSizeProgress() {<a name="line.181"></a> |
| <span class="sourceLineNo">182</span> return progress.getHeapSize();<a name="line.182"></a> |
| <span class="sourceLineNo">183</span> }<a name="line.183"></a> |
| <span class="sourceLineNo">184</span><a name="line.184"></a> |
| <span class="sourceLineNo">185</span> void setProgress(int batchProgress, long sizeProgress, long heapSizeProgress) {<a name="line.185"></a> |
| <span class="sourceLineNo">186</span> setBatchProgress(batchProgress);<a name="line.186"></a> |
| <span class="sourceLineNo">187</span> setSizeProgress(sizeProgress, heapSizeProgress);<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> void setSizeProgress(long dataSizeProgress, long heapSizeProgress) {<a name="line.190"></a> |
| <span class="sourceLineNo">191</span> progress.setDataSize(dataSizeProgress);<a name="line.191"></a> |
| <span class="sourceLineNo">192</span> progress.setHeapSize(heapSizeProgress);<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> void setBatchProgress(int batchProgress) {<a name="line.195"></a> |
| <span class="sourceLineNo">196</span> progress.setBatch(batchProgress);<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> /**<a name="line.199"></a> |
| <span class="sourceLineNo">200</span> * Clear away any progress that has been made so far. All progress fields are reset to initial<a name="line.200"></a> |
| <span class="sourceLineNo">201</span> * values<a name="line.201"></a> |
| <span class="sourceLineNo">202</span> */<a name="line.202"></a> |
| <span class="sourceLineNo">203</span> void clearProgress() {<a name="line.203"></a> |
| <span class="sourceLineNo">204</span> progress.setFields(0, 0, 0);<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> /**<a name="line.207"></a> |
| <span class="sourceLineNo">208</span> * Note that this is not a typical setter. This setter returns the {@link NextState} that was<a name="line.208"></a> |
| <span class="sourceLineNo">209</span> * passed in so that methods can be invoked against the new state. Furthermore, this pattern<a name="line.209"></a> |
| <span class="sourceLineNo">210</span> * allows the {@link NoLimitScannerContext} to cleanly override this setter and simply return the<a name="line.210"></a> |
| <span class="sourceLineNo">211</span> * new state, thus preserving the immutability of {@link NoLimitScannerContext}<a name="line.211"></a> |
| <span class="sourceLineNo">212</span> * @param state<a name="line.212"></a> |
| <span class="sourceLineNo">213</span> * @return The state that was passed in.<a name="line.213"></a> |
| <span class="sourceLineNo">214</span> */<a name="line.214"></a> |
| <span class="sourceLineNo">215</span> NextState setScannerState(NextState state) {<a name="line.215"></a> |
| <span class="sourceLineNo">216</span> if (!NextState.isValidState(state)) {<a name="line.216"></a> |
| <span class="sourceLineNo">217</span> throw new IllegalArgumentException("Cannot set to invalid state: " + state);<a name="line.217"></a> |
| <span class="sourceLineNo">218</span> }<a name="line.218"></a> |
| <span class="sourceLineNo">219</span><a name="line.219"></a> |
| <span class="sourceLineNo">220</span> this.scannerState = state;<a name="line.220"></a> |
| <span class="sourceLineNo">221</span> return state;<a name="line.221"></a> |
| <span class="sourceLineNo">222</span> }<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> * @return true when we have more cells for the current row. This usually because we have reached<a name="line.225"></a> |
| <span class="sourceLineNo">226</span> * a limit in the middle of a row<a name="line.226"></a> |
| <span class="sourceLineNo">227</span> */<a name="line.227"></a> |
| <span class="sourceLineNo">228</span> boolean mayHaveMoreCellsInRow() {<a name="line.228"></a> |
| <span class="sourceLineNo">229</span> return scannerState == NextState.SIZE_LIMIT_REACHED_MID_ROW ||<a name="line.229"></a> |
| <span class="sourceLineNo">230</span> scannerState == NextState.TIME_LIMIT_REACHED_MID_ROW ||<a name="line.230"></a> |
| <span class="sourceLineNo">231</span> scannerState == NextState.BATCH_LIMIT_REACHED;<a name="line.231"></a> |
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| <span class="sourceLineNo">257</span> (limits.getTime() > 0 || returnImmediately);<a name="line.257"></a> |
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| <span class="sourceLineNo">313</span> * checked against {@link System#currentTimeMillis()}<a name="line.313"></a> |
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| <span class="sourceLineNo">454</span> /**<a name="line.454"></a> |
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| <span class="sourceLineNo">458</span> return this.limitReached;<a name="line.458"></a> |
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| <span class="sourceLineNo">460</span><a name="line.460"></a> |
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| <span class="sourceLineNo">481</span> /**<a name="line.481"></a> |
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| <span class="sourceLineNo">483</span> * has been retrieved<a name="line.483"></a> |
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| <span class="sourceLineNo">485</span> BETWEEN_CELLS(1);<a name="line.485"></a> |
| <span class="sourceLineNo">486</span><a name="line.486"></a> |
| <span class="sourceLineNo">487</span> /**<a name="line.487"></a> |
| <span class="sourceLineNo">488</span> * When enforcing a limit, we must check that the scope is appropriate for enforcement.<a name="line.488"></a> |
| <span class="sourceLineNo">489</span> * <p><a name="line.489"></a> |
| <span class="sourceLineNo">490</span> * To communicate this concept, each scope has a depth. A limit will be enforced if the depth of<a name="line.490"></a> |
| <span class="sourceLineNo">491</span> * the checker's scope is less than or equal to the limit's scope. This means that when checking<a name="line.491"></a> |
| <span class="sourceLineNo">492</span> * limits, the checker must know their own scope (i.e. are they checking the limits between<a name="line.492"></a> |
| <span class="sourceLineNo">493</span> * rows, between cells, etc...)<a name="line.493"></a> |
| <span class="sourceLineNo">494</span> */<a name="line.494"></a> |
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| <span class="sourceLineNo">497</span> LimitScope(int depth) {<a name="line.497"></a> |
| <span class="sourceLineNo">498</span> this.depth = depth;<a name="line.498"></a> |
| <span class="sourceLineNo">499</span> }<a name="line.499"></a> |
| <span class="sourceLineNo">500</span><a name="line.500"></a> |
| <span class="sourceLineNo">501</span> final int depth() {<a name="line.501"></a> |
| <span class="sourceLineNo">502</span> return depth;<a name="line.502"></a> |
| <span class="sourceLineNo">503</span> }<a name="line.503"></a> |
| <span class="sourceLineNo">504</span><a name="line.504"></a> |
| <span class="sourceLineNo">505</span> /**<a name="line.505"></a> |
| <span class="sourceLineNo">506</span> * @param checkerScope The scope in which the limit is being checked<a name="line.506"></a> |
| <span class="sourceLineNo">507</span> * @return true when the checker is in a scope that indicates the limit can be enforced. Limits<a name="line.507"></a> |
| <span class="sourceLineNo">508</span> * can be enforced from "higher or equal" scopes (i.e. the checker's scope is at a<a name="line.508"></a> |
| <span class="sourceLineNo">509</span> * lesser depth than the limit)<a name="line.509"></a> |
| <span class="sourceLineNo">510</span> */<a name="line.510"></a> |
| <span class="sourceLineNo">511</span> boolean canEnforceLimitFromScope(LimitScope checkerScope) {<a name="line.511"></a> |
| <span class="sourceLineNo">512</span> return checkerScope != null && checkerScope.depth() <= depth;<a name="line.512"></a> |
| <span class="sourceLineNo">513</span> }<a name="line.513"></a> |
| <span class="sourceLineNo">514</span> }<a name="line.514"></a> |
| <span class="sourceLineNo">515</span><a name="line.515"></a> |
| <span class="sourceLineNo">516</span> /**<a name="line.516"></a> |
| <span class="sourceLineNo">517</span> * The different fields that can be used as limits in calls to<a name="line.517"></a> |
| <span class="sourceLineNo">518</span> * {@link InternalScanner#next(java.util.List)} and {@link RegionScanner#next(java.util.List)}<a name="line.518"></a> |
| <span class="sourceLineNo">519</span> */<a name="line.519"></a> |
| <span class="sourceLineNo">520</span> private static class LimitFields {<a name="line.520"></a> |
| <span class="sourceLineNo">521</span> /**<a name="line.521"></a> |
| <span class="sourceLineNo">522</span> * Default values of the limit fields. Defined such that if a field does NOT change from its<a name="line.522"></a> |
| <span class="sourceLineNo">523</span> * default, it will not be enforced<a name="line.523"></a> |
| <span class="sourceLineNo">524</span> */<a name="line.524"></a> |
| <span class="sourceLineNo">525</span> private static int DEFAULT_BATCH = -1;<a name="line.525"></a> |
| <span class="sourceLineNo">526</span> private static long DEFAULT_SIZE = -1L;<a name="line.526"></a> |
| <span class="sourceLineNo">527</span> private static long DEFAULT_TIME = -1L;<a name="line.527"></a> |
| <span class="sourceLineNo">528</span><a name="line.528"></a> |
| <span class="sourceLineNo">529</span> /**<a name="line.529"></a> |
| <span class="sourceLineNo">530</span> * Default scope that is assigned to a limit if a scope is not specified.<a name="line.530"></a> |
| <span class="sourceLineNo">531</span> */<a name="line.531"></a> |
| <span class="sourceLineNo">532</span> private static final LimitScope DEFAULT_SCOPE = LimitScope.BETWEEN_ROWS;<a name="line.532"></a> |
| <span class="sourceLineNo">533</span><a name="line.533"></a> |
| <span class="sourceLineNo">534</span> // The batch limit will always be enforced between cells, thus, there isn't a field to hold the<a name="line.534"></a> |
| <span class="sourceLineNo">535</span> // batch scope<a name="line.535"></a> |
| <span class="sourceLineNo">536</span> int batch = DEFAULT_BATCH;<a name="line.536"></a> |
| <span class="sourceLineNo">537</span><a name="line.537"></a> |
| <span class="sourceLineNo">538</span> LimitScope sizeScope = DEFAULT_SCOPE;<a name="line.538"></a> |
| <span class="sourceLineNo">539</span> // The sum of cell data sizes(key + value). The Cell data might be in on heap or off heap area.<a name="line.539"></a> |
| <span class="sourceLineNo">540</span> long dataSize = DEFAULT_SIZE;<a name="line.540"></a> |
| <span class="sourceLineNo">541</span> // The sum of heap space occupied by all tracked cells. This includes Cell POJO's overhead as<a name="line.541"></a> |
| <span class="sourceLineNo">542</span> // such AND data cells of Cells which are in on heap area.<a name="line.542"></a> |
| <span class="sourceLineNo">543</span> long heapSize = DEFAULT_SIZE;<a name="line.543"></a> |
| <span class="sourceLineNo">544</span><a name="line.544"></a> |
| <span class="sourceLineNo">545</span> LimitScope timeScope = DEFAULT_SCOPE;<a name="line.545"></a> |
| <span class="sourceLineNo">546</span> long time = DEFAULT_TIME;<a name="line.546"></a> |
| <span class="sourceLineNo">547</span><a name="line.547"></a> |
| <span class="sourceLineNo">548</span> /**<a name="line.548"></a> |
| <span class="sourceLineNo">549</span> * Fields keep their default values.<a name="line.549"></a> |
| <span class="sourceLineNo">550</span> */<a name="line.550"></a> |
| <span class="sourceLineNo">551</span> LimitFields() {<a name="line.551"></a> |
| <span class="sourceLineNo">552</span> }<a name="line.552"></a> |
| <span class="sourceLineNo">553</span><a name="line.553"></a> |
| <span class="sourceLineNo">554</span> void copy(LimitFields limitsToCopy) {<a name="line.554"></a> |
| <span class="sourceLineNo">555</span> if (limitsToCopy != null) {<a name="line.555"></a> |
| <span class="sourceLineNo">556</span> setFields(limitsToCopy.getBatch(), limitsToCopy.getSizeScope(), limitsToCopy.getDataSize(),<a name="line.556"></a> |
| <span class="sourceLineNo">557</span> limitsToCopy.getHeapSize(), limitsToCopy.getTimeScope(), limitsToCopy.getTime());<a name="line.557"></a> |
| <span class="sourceLineNo">558</span> }<a name="line.558"></a> |
| <span class="sourceLineNo">559</span> }<a name="line.559"></a> |
| <span class="sourceLineNo">560</span><a name="line.560"></a> |
| <span class="sourceLineNo">561</span> /**<a name="line.561"></a> |
| <span class="sourceLineNo">562</span> * Set all fields together.<a name="line.562"></a> |
| <span class="sourceLineNo">563</span> */<a name="line.563"></a> |
| <span class="sourceLineNo">564</span> void setFields(int batch, LimitScope sizeScope, long dataSize, long heapSize,<a name="line.564"></a> |
| <span class="sourceLineNo">565</span> LimitScope timeScope, long time) {<a name="line.565"></a> |
| <span class="sourceLineNo">566</span> setBatch(batch);<a name="line.566"></a> |
| <span class="sourceLineNo">567</span> setSizeScope(sizeScope);<a name="line.567"></a> |
| <span class="sourceLineNo">568</span> setDataSize(dataSize);<a name="line.568"></a> |
| <span class="sourceLineNo">569</span> setHeapSize(heapSize);<a name="line.569"></a> |
| <span class="sourceLineNo">570</span> setTimeScope(timeScope);<a name="line.570"></a> |
| <span class="sourceLineNo">571</span> setTime(time);<a name="line.571"></a> |
| <span class="sourceLineNo">572</span> }<a name="line.572"></a> |
| <span class="sourceLineNo">573</span><a name="line.573"></a> |
| <span class="sourceLineNo">574</span> int getBatch() {<a name="line.574"></a> |
| <span class="sourceLineNo">575</span> return this.batch;<a name="line.575"></a> |
| <span class="sourceLineNo">576</span> }<a name="line.576"></a> |
| <span class="sourceLineNo">577</span><a name="line.577"></a> |
| <span class="sourceLineNo">578</span> void setBatch(int batch) {<a name="line.578"></a> |
| <span class="sourceLineNo">579</span> this.batch = batch;<a name="line.579"></a> |
| <span class="sourceLineNo">580</span> }<a name="line.580"></a> |
| <span class="sourceLineNo">581</span><a name="line.581"></a> |
| <span class="sourceLineNo">582</span> /**<a name="line.582"></a> |
| <span class="sourceLineNo">583</span> * @param checkerScope<a name="line.583"></a> |
| <span class="sourceLineNo">584</span> * @return true when the limit can be enforced from the scope of the checker<a name="line.584"></a> |
| <span class="sourceLineNo">585</span> */<a name="line.585"></a> |
| <span class="sourceLineNo">586</span> boolean canEnforceBatchLimitFromScope(LimitScope checkerScope) {<a name="line.586"></a> |
| <span class="sourceLineNo">587</span> return LimitScope.BETWEEN_CELLS.canEnforceLimitFromScope(checkerScope);<a name="line.587"></a> |
| <span class="sourceLineNo">588</span> }<a name="line.588"></a> |
| <span class="sourceLineNo">589</span><a name="line.589"></a> |
| <span class="sourceLineNo">590</span> long getDataSize() {<a name="line.590"></a> |
| <span class="sourceLineNo">591</span> return this.dataSize;<a name="line.591"></a> |
| <span class="sourceLineNo">592</span> }<a name="line.592"></a> |
| <span class="sourceLineNo">593</span><a name="line.593"></a> |
| <span class="sourceLineNo">594</span> long getHeapSize() {<a name="line.594"></a> |
| <span class="sourceLineNo">595</span> return this.heapSize;<a name="line.595"></a> |
| <span class="sourceLineNo">596</span> }<a name="line.596"></a> |
| <span class="sourceLineNo">597</span><a name="line.597"></a> |
| <span class="sourceLineNo">598</span> void setDataSize(long dataSize) {<a name="line.598"></a> |
| <span class="sourceLineNo">599</span> this.dataSize = dataSize;<a name="line.599"></a> |
| <span class="sourceLineNo">600</span> }<a name="line.600"></a> |
| <span class="sourceLineNo">601</span><a name="line.601"></a> |
| <span class="sourceLineNo">602</span> void setHeapSize(long heapSize) {<a name="line.602"></a> |
| <span class="sourceLineNo">603</span> this.heapSize = heapSize;<a name="line.603"></a> |
| <span class="sourceLineNo">604</span> }<a name="line.604"></a> |
| <span class="sourceLineNo">605</span><a name="line.605"></a> |
| <span class="sourceLineNo">606</span> /**<a name="line.606"></a> |
| <span class="sourceLineNo">607</span> * @return {@link LimitScope} indicating scope in which the size limit is enforced<a name="line.607"></a> |
| <span class="sourceLineNo">608</span> */<a name="line.608"></a> |
| <span class="sourceLineNo">609</span> LimitScope getSizeScope() {<a name="line.609"></a> |
| <span class="sourceLineNo">610</span> return this.sizeScope;<a name="line.610"></a> |
| <span class="sourceLineNo">611</span> }<a name="line.611"></a> |
| <span class="sourceLineNo">612</span><a name="line.612"></a> |
| <span class="sourceLineNo">613</span> /**<a name="line.613"></a> |
| <span class="sourceLineNo">614</span> * Change the scope in which the size limit is enforced<a name="line.614"></a> |
| <span class="sourceLineNo">615</span> */<a name="line.615"></a> |
| <span class="sourceLineNo">616</span> void setSizeScope(LimitScope scope) {<a name="line.616"></a> |
| <span class="sourceLineNo">617</span> this.sizeScope = scope;<a name="line.617"></a> |
| <span class="sourceLineNo">618</span> }<a name="line.618"></a> |
| <span class="sourceLineNo">619</span><a name="line.619"></a> |
| <span class="sourceLineNo">620</span> /**<a name="line.620"></a> |
| <span class="sourceLineNo">621</span> * @param checkerScope<a name="line.621"></a> |
| <span class="sourceLineNo">622</span> * @return true when the limit can be enforced from the scope of the checker<a name="line.622"></a> |
| <span class="sourceLineNo">623</span> */<a name="line.623"></a> |
| <span class="sourceLineNo">624</span> boolean canEnforceSizeLimitFromScope(LimitScope checkerScope) {<a name="line.624"></a> |
| <span class="sourceLineNo">625</span> return this.sizeScope.canEnforceLimitFromScope(checkerScope);<a name="line.625"></a> |
| <span class="sourceLineNo">626</span> }<a name="line.626"></a> |
| <span class="sourceLineNo">627</span><a name="line.627"></a> |
| <span class="sourceLineNo">628</span> long getTime() {<a name="line.628"></a> |
| <span class="sourceLineNo">629</span> return this.time;<a name="line.629"></a> |
| <span class="sourceLineNo">630</span> }<a name="line.630"></a> |
| <span class="sourceLineNo">631</span><a name="line.631"></a> |
| <span class="sourceLineNo">632</span> void setTime(long time) {<a name="line.632"></a> |
| <span class="sourceLineNo">633</span> this.time = time;<a name="line.633"></a> |
| <span class="sourceLineNo">634</span> }<a name="line.634"></a> |
| <span class="sourceLineNo">635</span><a name="line.635"></a> |
| <span class="sourceLineNo">636</span> /**<a name="line.636"></a> |
| <span class="sourceLineNo">637</span> * @return {@link LimitScope} indicating scope in which the time limit is enforced<a name="line.637"></a> |
| <span class="sourceLineNo">638</span> */<a name="line.638"></a> |
| <span class="sourceLineNo">639</span> LimitScope getTimeScope() {<a name="line.639"></a> |
| <span class="sourceLineNo">640</span> return this.timeScope;<a name="line.640"></a> |
| <span class="sourceLineNo">641</span> }<a name="line.641"></a> |
| <span class="sourceLineNo">642</span><a name="line.642"></a> |
| <span class="sourceLineNo">643</span> /**<a name="line.643"></a> |
| <span class="sourceLineNo">644</span> * Change the scope in which the time limit is enforced<a name="line.644"></a> |
| <span class="sourceLineNo">645</span> */<a name="line.645"></a> |
| <span class="sourceLineNo">646</span> void setTimeScope(LimitScope scope) {<a name="line.646"></a> |
| <span class="sourceLineNo">647</span> this.timeScope = scope;<a name="line.647"></a> |
| <span class="sourceLineNo">648</span> }<a name="line.648"></a> |
| <span class="sourceLineNo">649</span><a name="line.649"></a> |
| <span class="sourceLineNo">650</span> /**<a name="line.650"></a> |
| <span class="sourceLineNo">651</span> * @param checkerScope<a name="line.651"></a> |
| <span class="sourceLineNo">652</span> * @return true when the limit can be enforced from the scope of the checker<a name="line.652"></a> |
| <span class="sourceLineNo">653</span> */<a name="line.653"></a> |
| <span class="sourceLineNo">654</span> boolean canEnforceTimeLimitFromScope(LimitScope checkerScope) {<a name="line.654"></a> |
| <span class="sourceLineNo">655</span> return this.timeScope.canEnforceLimitFromScope(checkerScope);<a name="line.655"></a> |
| <span class="sourceLineNo">656</span> }<a name="line.656"></a> |
| <span class="sourceLineNo">657</span><a name="line.657"></a> |
| <span class="sourceLineNo">658</span> @Override<a name="line.658"></a> |
| <span class="sourceLineNo">659</span> public String toString() {<a name="line.659"></a> |
| <span class="sourceLineNo">660</span> StringBuilder sb = new StringBuilder();<a name="line.660"></a> |
| <span class="sourceLineNo">661</span> sb.append("{");<a name="line.661"></a> |
| <span class="sourceLineNo">662</span><a name="line.662"></a> |
| <span class="sourceLineNo">663</span> sb.append("batch:");<a name="line.663"></a> |
| <span class="sourceLineNo">664</span> sb.append(batch);<a name="line.664"></a> |
| <span class="sourceLineNo">665</span><a name="line.665"></a> |
| <span class="sourceLineNo">666</span> sb.append(", dataSize:");<a name="line.666"></a> |
| <span class="sourceLineNo">667</span> sb.append(dataSize);<a name="line.667"></a> |
| <span class="sourceLineNo">668</span><a name="line.668"></a> |
| <span class="sourceLineNo">669</span> sb.append(", heapSize:");<a name="line.669"></a> |
| <span class="sourceLineNo">670</span> sb.append(heapSize);<a name="line.670"></a> |
| <span class="sourceLineNo">671</span><a name="line.671"></a> |
| <span class="sourceLineNo">672</span> sb.append(", sizeScope:");<a name="line.672"></a> |
| <span class="sourceLineNo">673</span> sb.append(sizeScope);<a name="line.673"></a> |
| <span class="sourceLineNo">674</span><a name="line.674"></a> |
| <span class="sourceLineNo">675</span> sb.append(", time:");<a name="line.675"></a> |
| <span class="sourceLineNo">676</span> sb.append(time);<a name="line.676"></a> |
| <span class="sourceLineNo">677</span><a name="line.677"></a> |
| <span class="sourceLineNo">678</span> sb.append(", timeScope:");<a name="line.678"></a> |
| <span class="sourceLineNo">679</span> sb.append(timeScope);<a name="line.679"></a> |
| <span class="sourceLineNo">680</span><a name="line.680"></a> |
| <span class="sourceLineNo">681</span> sb.append("}");<a name="line.681"></a> |
| <span class="sourceLineNo">682</span> return sb.toString();<a name="line.682"></a> |
| <span class="sourceLineNo">683</span> }<a name="line.683"></a> |
| <span class="sourceLineNo">684</span> }<a name="line.684"></a> |
| <span class="sourceLineNo">685</span><a name="line.685"></a> |
| <span class="sourceLineNo">686</span> private static class ProgressFields {<a name="line.686"></a> |
| <span class="sourceLineNo">687</span><a name="line.687"></a> |
| <span class="sourceLineNo">688</span> private static int DEFAULT_BATCH = -1;<a name="line.688"></a> |
| <span class="sourceLineNo">689</span> private static long DEFAULT_SIZE = -1L;<a name="line.689"></a> |
| <span class="sourceLineNo">690</span><a name="line.690"></a> |
| <span class="sourceLineNo">691</span> // The batch limit will always be enforced between cells, thus, there isn't a field to hold the<a name="line.691"></a> |
| <span class="sourceLineNo">692</span> // batch scope<a name="line.692"></a> |
| <span class="sourceLineNo">693</span> int batch = DEFAULT_BATCH;<a name="line.693"></a> |
| <span class="sourceLineNo">694</span><a name="line.694"></a> |
| <span class="sourceLineNo">695</span> // The sum of cell data sizes(key + value). The Cell data might be in on heap or off heap area.<a name="line.695"></a> |
| <span class="sourceLineNo">696</span> long dataSize = DEFAULT_SIZE;<a name="line.696"></a> |
| <span class="sourceLineNo">697</span> // The sum of heap space occupied by all tracked cells. This includes Cell POJO's overhead as<a name="line.697"></a> |
| <span class="sourceLineNo">698</span> // such AND data cells of Cells which are in on heap area.<a name="line.698"></a> |
| <span class="sourceLineNo">699</span> long heapSize = DEFAULT_SIZE;<a name="line.699"></a> |
| <span class="sourceLineNo">700</span><a name="line.700"></a> |
| <span class="sourceLineNo">701</span> ProgressFields(int batch, long size, long heapSize) {<a name="line.701"></a> |
| <span class="sourceLineNo">702</span> setFields(batch, size, heapSize);<a name="line.702"></a> |
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| <span class="sourceLineNo">704</span><a name="line.704"></a> |
| <span class="sourceLineNo">705</span> /**<a name="line.705"></a> |
| <span class="sourceLineNo">706</span> * Set all fields together.<a name="line.706"></a> |
| <span class="sourceLineNo">707</span> */<a name="line.707"></a> |
| <span class="sourceLineNo">708</span> void setFields(int batch, long dataSize, long heapSize) {<a name="line.708"></a> |
| <span class="sourceLineNo">709</span> setBatch(batch);<a name="line.709"></a> |
| <span class="sourceLineNo">710</span> setDataSize(dataSize);<a name="line.710"></a> |
| <span class="sourceLineNo">711</span> setHeapSize(heapSize);<a name="line.711"></a> |
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| <span class="sourceLineNo">713</span><a name="line.713"></a> |
| <span class="sourceLineNo">714</span> int getBatch() {<a name="line.714"></a> |
| <span class="sourceLineNo">715</span> return this.batch;<a name="line.715"></a> |
| <span class="sourceLineNo">716</span> }<a name="line.716"></a> |
| <span class="sourceLineNo">717</span><a name="line.717"></a> |
| <span class="sourceLineNo">718</span> void setBatch(int batch) {<a name="line.718"></a> |
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| <span class="sourceLineNo">721</span><a name="line.721"></a> |
| <span class="sourceLineNo">722</span> long getDataSize() {<a name="line.722"></a> |
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| <span class="sourceLineNo">725</span><a name="line.725"></a> |
| <span class="sourceLineNo">726</span> long getHeapSize() {<a name="line.726"></a> |
| <span class="sourceLineNo">727</span> return this.heapSize;<a name="line.727"></a> |
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| <span class="sourceLineNo">729</span><a name="line.729"></a> |
| <span class="sourceLineNo">730</span> void setDataSize(long dataSize) {<a name="line.730"></a> |
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| <span class="sourceLineNo">733</span><a name="line.733"></a> |
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| <span class="sourceLineNo">735</span> this.heapSize = heapSize;<a name="line.735"></a> |
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| <span class="sourceLineNo">737</span><a name="line.737"></a> |
| <span class="sourceLineNo">738</span> @Override<a name="line.738"></a> |
| <span class="sourceLineNo">739</span> public String toString() {<a name="line.739"></a> |
| <span class="sourceLineNo">740</span> StringBuilder sb = new StringBuilder();<a name="line.740"></a> |
| <span class="sourceLineNo">741</span> sb.append("{");<a name="line.741"></a> |
| <span class="sourceLineNo">742</span><a name="line.742"></a> |
| <span class="sourceLineNo">743</span> sb.append("batch:");<a name="line.743"></a> |
| <span class="sourceLineNo">744</span> sb.append(batch);<a name="line.744"></a> |
| <span class="sourceLineNo">745</span><a name="line.745"></a> |
| <span class="sourceLineNo">746</span> sb.append(", dataSize:");<a name="line.746"></a> |
| <span class="sourceLineNo">747</span> sb.append(dataSize);<a name="line.747"></a> |
| <span class="sourceLineNo">748</span><a name="line.748"></a> |
| <span class="sourceLineNo">749</span> sb.append(", heapSize:");<a name="line.749"></a> |
| <span class="sourceLineNo">750</span> sb.append(heapSize);<a name="line.750"></a> |
| <span class="sourceLineNo">751</span><a name="line.751"></a> |
| <span class="sourceLineNo">752</span> sb.append("}");<a name="line.752"></a> |
| <span class="sourceLineNo">753</span> return sb.toString();<a name="line.753"></a> |
| <span class="sourceLineNo">754</span> }<a name="line.754"></a> |
| <span class="sourceLineNo">755</span> }<a name="line.755"></a> |
| <span class="sourceLineNo">756</span>}<a name="line.756"></a> |
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| </pre> |
| </div> |
| </body> |
| </html> |
