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Posted to commits@hbase.apache.org by gi...@apache.org on 2018/12/27 14:53:23 UTC
[17/51] [partial] hbase-site git commit: Published site at
7820ba1dbdba58b1002cdfde08eb21aa7a0bb6da.
http://git-wip-us.apache.org/repos/asf/hbase-site/blob/09ea0d5f/devapidocs/src-html/org/apache/hadoop/hbase/coprocessor/RegionObserver.html
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diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/coprocessor/RegionObserver.html b/devapidocs/src-html/org/apache/hadoop/hbase/coprocessor/RegionObserver.html
index 2c6f38a..c537059 100644
--- a/devapidocs/src-html/org/apache/hadoop/hbase/coprocessor/RegionObserver.html
+++ b/devapidocs/src-html/org/apache/hadoop/hbase/coprocessor/RegionObserver.html
@@ -28,1039 +28,1086 @@
<span class="sourceLineNo">020</span>package org.apache.hadoop.hbase.coprocessor;<a name="line.20"></a>
<span class="sourceLineNo">021</span><a name="line.21"></a>
<span class="sourceLineNo">022</span>import java.io.IOException;<a name="line.22"></a>
-<span class="sourceLineNo">023</span>import java.util.List;<a name="line.23"></a>
-<span class="sourceLineNo">024</span>import java.util.Map;<a name="line.24"></a>
-<span class="sourceLineNo">025</span><a name="line.25"></a>
-<span class="sourceLineNo">026</span>import org.apache.hadoop.fs.FileSystem;<a name="line.26"></a>
-<span class="sourceLineNo">027</span>import org.apache.hadoop.fs.Path;<a name="line.27"></a>
-<span class="sourceLineNo">028</span>import org.apache.hadoop.hbase.Cell;<a name="line.28"></a>
-<span class="sourceLineNo">029</span>import org.apache.hadoop.hbase.CompareOperator;<a name="line.29"></a>
-<span class="sourceLineNo">030</span>import org.apache.hadoop.hbase.HBaseInterfaceAudience;<a name="line.30"></a>
-<span class="sourceLineNo">031</span>import org.apache.hadoop.hbase.client.Append;<a name="line.31"></a>
-<span class="sourceLineNo">032</span>import org.apache.hadoop.hbase.client.Delete;<a name="line.32"></a>
-<span class="sourceLineNo">033</span>import org.apache.hadoop.hbase.client.Durability;<a name="line.33"></a>
-<span class="sourceLineNo">034</span>import org.apache.hadoop.hbase.client.Get;<a name="line.34"></a>
-<span class="sourceLineNo">035</span>import org.apache.hadoop.hbase.client.Increment;<a name="line.35"></a>
-<span class="sourceLineNo">036</span>import org.apache.hadoop.hbase.client.Mutation;<a name="line.36"></a>
-<span class="sourceLineNo">037</span>import org.apache.hadoop.hbase.client.Put;<a name="line.37"></a>
-<span class="sourceLineNo">038</span>import org.apache.hadoop.hbase.client.RegionInfo;<a name="line.38"></a>
-<span class="sourceLineNo">039</span>import org.apache.hadoop.hbase.client.Result;<a name="line.39"></a>
-<span class="sourceLineNo">040</span>import org.apache.hadoop.hbase.client.Scan;<a name="line.40"></a>
-<span class="sourceLineNo">041</span>import org.apache.hadoop.hbase.filter.ByteArrayComparable;<a name="line.41"></a>
-<span class="sourceLineNo">042</span>import org.apache.hadoop.hbase.io.FSDataInputStreamWrapper;<a name="line.42"></a>
-<span class="sourceLineNo">043</span>import org.apache.hadoop.hbase.io.Reference;<a name="line.43"></a>
-<span class="sourceLineNo">044</span>import org.apache.hadoop.hbase.io.hfile.CacheConfig;<a name="line.44"></a>
-<span class="sourceLineNo">045</span>import org.apache.hadoop.hbase.regionserver.FlushLifeCycleTracker;<a name="line.45"></a>
-<span class="sourceLineNo">046</span>import org.apache.hadoop.hbase.regionserver.InternalScanner;<a name="line.46"></a>
-<span class="sourceLineNo">047</span>import org.apache.hadoop.hbase.regionserver.MiniBatchOperationInProgress;<a name="line.47"></a>
-<span class="sourceLineNo">048</span>import org.apache.hadoop.hbase.regionserver.OperationStatus;<a name="line.48"></a>
-<span class="sourceLineNo">049</span>import org.apache.hadoop.hbase.regionserver.Region;<a name="line.49"></a>
-<span class="sourceLineNo">050</span>import org.apache.hadoop.hbase.regionserver.Region.Operation;<a name="line.50"></a>
-<span class="sourceLineNo">051</span>import org.apache.hadoop.hbase.regionserver.RegionScanner;<a name="line.51"></a>
-<span class="sourceLineNo">052</span>import org.apache.hadoop.hbase.regionserver.ScanOptions;<a name="line.52"></a>
-<span class="sourceLineNo">053</span>import org.apache.hadoop.hbase.regionserver.ScanType;<a name="line.53"></a>
-<span class="sourceLineNo">054</span>import org.apache.hadoop.hbase.regionserver.Store;<a name="line.54"></a>
-<span class="sourceLineNo">055</span>import org.apache.hadoop.hbase.regionserver.StoreFile;<a name="line.55"></a>
-<span class="sourceLineNo">056</span>import org.apache.hadoop.hbase.regionserver.StoreFileReader;<a name="line.56"></a>
-<span class="sourceLineNo">057</span>import org.apache.hadoop.hbase.regionserver.compactions.CompactionLifeCycleTracker;<a name="line.57"></a>
-<span class="sourceLineNo">058</span>import org.apache.hadoop.hbase.regionserver.compactions.CompactionRequest;<a name="line.58"></a>
-<span class="sourceLineNo">059</span>import org.apache.hadoop.hbase.regionserver.querymatcher.DeleteTracker;<a name="line.59"></a>
-<span class="sourceLineNo">060</span>import org.apache.hadoop.hbase.util.Pair;<a name="line.60"></a>
-<span class="sourceLineNo">061</span>import org.apache.hadoop.hbase.wal.WALEdit;<a name="line.61"></a>
-<span class="sourceLineNo">062</span>import org.apache.hadoop.hbase.wal.WALKey;<a name="line.62"></a>
-<span class="sourceLineNo">063</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.63"></a>
-<span class="sourceLineNo">064</span>import org.apache.yetus.audience.InterfaceStability;<a name="line.64"></a>
-<span class="sourceLineNo">065</span><a name="line.65"></a>
-<span class="sourceLineNo">066</span>/**<a name="line.66"></a>
-<span class="sourceLineNo">067</span> * Coprocessors implement this interface to observe and mediate client actions on the region.<a name="line.67"></a>
-<span class="sourceLineNo">068</span> * <p><a name="line.68"></a>
-<span class="sourceLineNo">069</span> * Since most implementations will be interested in only a subset of hooks, this class uses<a name="line.69"></a>
-<span class="sourceLineNo">070</span> * 'default' functions to avoid having to add unnecessary overrides. When the functions are<a name="line.70"></a>
-<span class="sourceLineNo">071</span> * non-empty, it's simply to satisfy the compiler by returning value of expected (non-void) type. It<a name="line.71"></a>
-<span class="sourceLineNo">072</span> * is done in a way that these default definitions act as no-op. So our suggestion to implementation<a name="line.72"></a>
-<span class="sourceLineNo">073</span> * would be to not call these 'default' methods from overrides.<a name="line.73"></a>
-<span class="sourceLineNo">074</span> * <p><a name="line.74"></a>
-<span class="sourceLineNo">075</span> * <h3>Exception Handling</h3><br><a name="line.75"></a>
-<span class="sourceLineNo">076</span> * For all functions, exception handling is done as follows:<a name="line.76"></a>
-<span class="sourceLineNo">077</span> * <ul><a name="line.77"></a>
-<span class="sourceLineNo">078</span> * <li>Exceptions of type {@link IOException} are reported back to client.</li><a name="line.78"></a>
-<span class="sourceLineNo">079</span> * <li>For any other kind of exception:<a name="line.79"></a>
-<span class="sourceLineNo">080</span> * <ul><a name="line.80"></a>
-<span class="sourceLineNo">081</span> * <li>If the configuration {@link CoprocessorHost#ABORT_ON_ERROR_KEY} is set to true, then the<a name="line.81"></a>
-<span class="sourceLineNo">082</span> * server aborts.</li><a name="line.82"></a>
-<span class="sourceLineNo">083</span> * <li>Otherwise, coprocessor is removed from the server and<a name="line.83"></a>
-<span class="sourceLineNo">084</span> * {@link org.apache.hadoop.hbase.DoNotRetryIOException} is returned to the client.</li><a name="line.84"></a>
-<span class="sourceLineNo">085</span> * </ul><a name="line.85"></a>
-<span class="sourceLineNo">086</span> * </li><a name="line.86"></a>
-<span class="sourceLineNo">087</span> * </ul><a name="line.87"></a>
-<span class="sourceLineNo">088</span> * <p><a name="line.88"></a>
-<span class="sourceLineNo">089</span> * <h3>For Split Related Hooks</h3> <br><a name="line.89"></a>
-<span class="sourceLineNo">090</span> * In hbase2/AMv2, master runs splits, so the split related hooks are moved to<a name="line.90"></a>
-<span class="sourceLineNo">091</span> * {@link MasterObserver}.<a name="line.91"></a>
-<span class="sourceLineNo">092</span> * <p><a name="line.92"></a>
-<span class="sourceLineNo">093</span> * <h3>Increment Column Value</h3><br><a name="line.93"></a>
-<span class="sourceLineNo">094</span> * We do not call this hook anymore.<a name="line.94"></a>
-<span class="sourceLineNo">095</span> */<a name="line.95"></a>
-<span class="sourceLineNo">096</span>@InterfaceAudience.LimitedPrivate(HBaseInterfaceAudience.COPROC)<a name="line.96"></a>
-<span class="sourceLineNo">097</span>@InterfaceStability.Evolving<a name="line.97"></a>
-<span class="sourceLineNo">098</span>// TODO as method signatures need to break, update to<a name="line.98"></a>
-<span class="sourceLineNo">099</span>// ObserverContext<? extends RegionCoprocessorEnvironment><a name="line.99"></a>
-<span class="sourceLineNo">100</span>// so we can use additional environment state that isn't exposed to coprocessors.<a name="line.100"></a>
-<span class="sourceLineNo">101</span>public interface RegionObserver {<a name="line.101"></a>
-<span class="sourceLineNo">102</span> /** Mutation type for postMutationBeforeWAL hook */<a name="line.102"></a>
-<span class="sourceLineNo">103</span> enum MutationType {<a name="line.103"></a>
-<span class="sourceLineNo">104</span> APPEND, INCREMENT<a name="line.104"></a>
-<span class="sourceLineNo">105</span> }<a name="line.105"></a>
-<span class="sourceLineNo">106</span><a name="line.106"></a>
-<span class="sourceLineNo">107</span> /**<a name="line.107"></a>
-<span class="sourceLineNo">108</span> * Called before the region is reported as open to the master.<a name="line.108"></a>
-<span class="sourceLineNo">109</span> * @param c the environment provided by the region server<a name="line.109"></a>
-<span class="sourceLineNo">110</span> */<a name="line.110"></a>
-<span class="sourceLineNo">111</span> default void preOpen(ObserverContext<RegionCoprocessorEnvironment> c) throws IOException {}<a name="line.111"></a>
-<span class="sourceLineNo">112</span><a name="line.112"></a>
-<span class="sourceLineNo">113</span> /**<a name="line.113"></a>
-<span class="sourceLineNo">114</span> * Called after the region is reported as open to the master.<a name="line.114"></a>
-<span class="sourceLineNo">115</span> * @param c the environment provided by the region server<a name="line.115"></a>
-<span class="sourceLineNo">116</span> */<a name="line.116"></a>
-<span class="sourceLineNo">117</span> default void postOpen(ObserverContext<RegionCoprocessorEnvironment> c) {}<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> * Called before the memstore is flushed to disk.<a name="line.120"></a>
-<span class="sourceLineNo">121</span> * @param c the environment provided by the region server<a name="line.121"></a>
-<span class="sourceLineNo">122</span> * @param tracker tracker used to track the life cycle of a flush<a name="line.122"></a>
-<span class="sourceLineNo">123</span> */<a name="line.123"></a>
-<span class="sourceLineNo">124</span> default void preFlush(final ObserverContext<RegionCoprocessorEnvironment> c,<a name="line.124"></a>
-<span class="sourceLineNo">125</span> FlushLifeCycleTracker tracker) throws IOException {}<a name="line.125"></a>
-<span class="sourceLineNo">126</span><a name="line.126"></a>
-<span class="sourceLineNo">127</span> /**<a name="line.127"></a>
-<span class="sourceLineNo">128</span> * Called before we open store scanner for flush. You can use the {@code options} to change max<a name="line.128"></a>
-<span class="sourceLineNo">129</span> * versions and TTL for the scanner being opened.<a name="line.129"></a>
-<span class="sourceLineNo">130</span> * @param c the environment provided by the region server<a name="line.130"></a>
-<span class="sourceLineNo">131</span> * @param store the store where flush is being requested<a name="line.131"></a>
-<span class="sourceLineNo">132</span> * @param options used to change max versions and TTL for the scanner being opened<a name="line.132"></a>
-<span class="sourceLineNo">133</span> */<a name="line.133"></a>
-<span class="sourceLineNo">134</span> default void preFlushScannerOpen(ObserverContext<RegionCoprocessorEnvironment> c, Store store,<a name="line.134"></a>
-<span class="sourceLineNo">135</span> ScanOptions options,FlushLifeCycleTracker tracker) throws IOException {}<a name="line.135"></a>
-<span class="sourceLineNo">136</span><a name="line.136"></a>
-<span class="sourceLineNo">137</span> /**<a name="line.137"></a>
-<span class="sourceLineNo">138</span> * Called before a Store's memstore is flushed to disk.<a name="line.138"></a>
-<span class="sourceLineNo">139</span> * @param c the environment provided by the region server<a name="line.139"></a>
-<span class="sourceLineNo">140</span> * @param store the store where flush is being requested<a name="line.140"></a>
-<span class="sourceLineNo">141</span> * @param scanner the scanner over existing data used in the memstore<a name="line.141"></a>
-<span class="sourceLineNo">142</span> * @param tracker tracker used to track the life cycle of a flush<a name="line.142"></a>
-<span class="sourceLineNo">143</span> * @return the scanner to use during flush. Should not be {@code null} unless the implementation<a name="line.143"></a>
-<span class="sourceLineNo">144</span> * is writing new store files on its own.<a name="line.144"></a>
-<span class="sourceLineNo">145</span> */<a name="line.145"></a>
-<span class="sourceLineNo">146</span> default InternalScanner preFlush(ObserverContext<RegionCoprocessorEnvironment> c, Store store,<a name="line.146"></a>
-<span class="sourceLineNo">147</span> InternalScanner scanner, FlushLifeCycleTracker tracker) throws IOException {<a name="line.147"></a>
-<span class="sourceLineNo">148</span> return scanner;<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> /**<a name="line.151"></a>
-<span class="sourceLineNo">152</span> * Called after the memstore is flushed to disk.<a name="line.152"></a>
-<span class="sourceLineNo">153</span> * @param c the environment provided by the region server<a name="line.153"></a>
-<span class="sourceLineNo">154</span> * @param tracker tracker used to track the life cycle of a flush<a name="line.154"></a>
-<span class="sourceLineNo">155</span> * @throws IOException if an error occurred on the coprocessor<a name="line.155"></a>
-<span class="sourceLineNo">156</span> */<a name="line.156"></a>
-<span class="sourceLineNo">157</span> default void postFlush(ObserverContext<RegionCoprocessorEnvironment> c,<a name="line.157"></a>
-<span class="sourceLineNo">158</span> FlushLifeCycleTracker tracker) throws IOException {}<a name="line.158"></a>
-<span class="sourceLineNo">159</span><a name="line.159"></a>
-<span class="sourceLineNo">160</span> /**<a name="line.160"></a>
-<span class="sourceLineNo">161</span> * Called after a Store's memstore is flushed to disk.<a name="line.161"></a>
-<span class="sourceLineNo">162</span> * @param c the environment provided by the region server<a name="line.162"></a>
-<span class="sourceLineNo">163</span> * @param store the store being flushed<a name="line.163"></a>
-<span class="sourceLineNo">164</span> * @param resultFile the new store file written out during compaction<a name="line.164"></a>
-<span class="sourceLineNo">165</span> * @param tracker tracker used to track the life cycle of a flush<a name="line.165"></a>
-<span class="sourceLineNo">166</span> */<a name="line.166"></a>
-<span class="sourceLineNo">167</span> default void postFlush(ObserverContext<RegionCoprocessorEnvironment> c, Store store,<a name="line.167"></a>
-<span class="sourceLineNo">168</span> StoreFile resultFile, FlushLifeCycleTracker tracker) throws IOException {}<a name="line.168"></a>
-<span class="sourceLineNo">169</span><a name="line.169"></a>
-<span class="sourceLineNo">170</span> /**<a name="line.170"></a>
-<span class="sourceLineNo">171</span> * Called before in memory compaction started.<a name="line.171"></a>
-<span class="sourceLineNo">172</span> * @param c the environment provided by the region server<a name="line.172"></a>
-<span class="sourceLineNo">173</span> * @param store the store where in memory compaction is being requested<a name="line.173"></a>
-<span class="sourceLineNo">174</span> */<a name="line.174"></a>
-<span class="sourceLineNo">175</span> default void preMemStoreCompaction(ObserverContext<RegionCoprocessorEnvironment> c, Store store)<a name="line.175"></a>
-<span class="sourceLineNo">176</span> throws IOException {}<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> * Called before we open store scanner for in memory compaction. You can use the {@code options}<a name="line.179"></a>
-<span class="sourceLineNo">180</span> * to change max versions and TTL for the scanner being opened. Notice that this method will only<a name="line.180"></a>
-<span class="sourceLineNo">181</span> * be called when you use {@code eager} mode. For {@code basic} mode we will not drop any cells<a name="line.181"></a>
-<span class="sourceLineNo">182</span> * thus we do not open a store scanner.<a name="line.182"></a>
-<span class="sourceLineNo">183</span> * @param c the environment provided by the region server<a name="line.183"></a>
-<span class="sourceLineNo">184</span> * @param store the store where in memory compaction is being requested<a name="line.184"></a>
-<span class="sourceLineNo">185</span> * @param options used to change max versions and TTL for the scanner being opened<a name="line.185"></a>
-<span class="sourceLineNo">186</span> */<a name="line.186"></a>
-<span class="sourceLineNo">187</span> default void preMemStoreCompactionCompactScannerOpen(<a name="line.187"></a>
-<span class="sourceLineNo">188</span> ObserverContext<RegionCoprocessorEnvironment> c, Store store, ScanOptions options)<a name="line.188"></a>
-<span class="sourceLineNo">189</span> throws IOException {}<a name="line.189"></a>
-<span class="sourceLineNo">190</span><a name="line.190"></a>
-<span class="sourceLineNo">191</span> /**<a name="line.191"></a>
-<span class="sourceLineNo">192</span> * Called before we do in memory compaction. Notice that this method will only be called when you<a name="line.192"></a>
-<span class="sourceLineNo">193</span> * use {@code eager} mode. For {@code basic} mode we will not drop any cells thus there is no<a name="line.193"></a>
-<span class="sourceLineNo">194</span> * {@link InternalScanner}.<a name="line.194"></a>
-<span class="sourceLineNo">195</span> * @param c the environment provided by the region server<a name="line.195"></a>
-<span class="sourceLineNo">196</span> * @param store the store where in memory compaction is being executed<a name="line.196"></a>
-<span class="sourceLineNo">197</span> * @param scanner the scanner over existing data used in the memstore segments being compact<a name="line.197"></a>
-<span class="sourceLineNo">198</span> * @return the scanner to use during in memory compaction. Must be non-null.<a name="line.198"></a>
-<span class="sourceLineNo">199</span> */<a name="line.199"></a>
-<span class="sourceLineNo">200</span> default InternalScanner preMemStoreCompactionCompact(<a name="line.200"></a>
-<span class="sourceLineNo">201</span> ObserverContext<RegionCoprocessorEnvironment> c, Store store, InternalScanner scanner)<a name="line.201"></a>
-<span class="sourceLineNo">202</span> throws IOException {<a name="line.202"></a>
-<span class="sourceLineNo">203</span> return scanner;<a name="line.203"></a>
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-<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> * Called after the in memory compaction is finished.<a name="line.207"></a>
-<span class="sourceLineNo">208</span> * @param c the environment provided by the region server<a name="line.208"></a>
-<span class="sourceLineNo">209</span> * @param store the store where in memory compaction is being executed<a name="line.209"></a>
-<span class="sourceLineNo">210</span> */<a name="line.210"></a>
-<span class="sourceLineNo">211</span> default void postMemStoreCompaction(ObserverContext<RegionCoprocessorEnvironment> c, Store store)<a name="line.211"></a>
-<span class="sourceLineNo">212</span> throws IOException {}<a name="line.212"></a>
-<span class="sourceLineNo">213</span><a name="line.213"></a>
-<span class="sourceLineNo">214</span> /**<a name="line.214"></a>
-<span class="sourceLineNo">215</span> * Called prior to selecting the {@link StoreFile StoreFiles} to compact from the list of<a name="line.215"></a>
-<span class="sourceLineNo">216</span> * available candidates. To alter the files used for compaction, you may mutate the passed in list<a name="line.216"></a>
-<span class="sourceLineNo">217</span> * of candidates. If you remove all the candidates then the compaction will be canceled.<a name="line.217"></a>
-<span class="sourceLineNo">218</span> * <p>Supports Coprocessor 'bypass' -- 'bypass' is how this method indicates that it changed<a name="line.218"></a>
-<span class="sourceLineNo">219</span> * the passed in <code>candidates</code>.<a name="line.219"></a>
-<span class="sourceLineNo">220</span> * If 'bypass' is set, we skip out on calling any subsequent chained coprocessors.<a name="line.220"></a>
-<span class="sourceLineNo">221</span> * @param c the environment provided by the region server<a name="line.221"></a>
-<span class="sourceLineNo">222</span> * @param store the store where compaction is being requested<a name="line.222"></a>
-<span class="sourceLineNo">223</span> * @param candidates the store files currently available for compaction<a name="line.223"></a>
-<span class="sourceLineNo">224</span> * @param tracker tracker used to track the life cycle of a compaction<a name="line.224"></a>
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-<span class="sourceLineNo">226</span> default void preCompactSelection(ObserverContext<RegionCoprocessorEnvironment> c, Store store,<a name="line.226"></a>
-<span class="sourceLineNo">227</span> List<? extends StoreFile> candidates, CompactionLifeCycleTracker tracker)<a name="line.227"></a>
-<span class="sourceLineNo">228</span> throws IOException {}<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> * Called after the {@link StoreFile}s to compact have been selected from the available<a name="line.231"></a>
-<span class="sourceLineNo">232</span> * candidates.<a name="line.232"></a>
-<span class="sourceLineNo">233</span> * @param c the environment provided by the region server<a name="line.233"></a>
-<span class="sourceLineNo">234</span> * @param store the store being compacted<a name="line.234"></a>
-<span class="sourceLineNo">235</span> * @param selected the store files selected to compact<a name="line.235"></a>
-<span class="sourceLineNo">236</span> * @param tracker tracker used to track the life cycle of a compaction<a name="line.236"></a>
-<span class="sourceLineNo">237</span> * @param request the requested compaction<a name="line.237"></a>
-<span class="sourceLineNo">238</span> */<a name="line.238"></a>
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-<span class="sourceLineNo">719</span> * <b>Note:</b> Caution to be taken for not doing any long time operation in this hook.<a name="line.719"></a>
-<span class="sourceLineNo">720</span> * Row will be locked for longer time. Trying to acquire lock on another row, within this,<a name="line.720"></a>
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-<span class="sourceLineNo">745</span> * If need a Cell reference for later use, copy the cell and use that.<a name="line.745"></a>
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-<span class="sourceLineNo">782</span><a name="line.782"></a>
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-<span class="sourceLineNo">788</span> * <p><a name="line.788"></a>
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