http://git-wip-us.apache.org/repos/asf/hbase-site/blob/4f1f2a0b/apidocs/src-html/org/apache/hadoop/hbase/client/TableSnapshotScanner.html
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diff --git
a/apidocs/src-html/org/apache/hadoop/hbase/client/TableSnapshotScanner.html
b/apidocs/src-html/org/apache/hadoop/hbase/client/TableSnapshotScanner.html
index 9615ff3..de8a96f 100644
--- a/apidocs/src-html/org/apache/hadoop/hbase/client/TableSnapshotScanner.html
+++ b/apidocs/src-html/org/apache/hadoop/hbase/client/TableSnapshotScanner.html
@@ -39,166 +39,165 @@
<span class="sourceLineNo">031</span>import org.apache.hadoop.fs.Path;<a
name="line.31"></a>
<span class="sourceLineNo">032</span>import
org.apache.hadoop.hbase.CellUtil;<a name="line.32"></a>
<span class="sourceLineNo">033</span>import
org.apache.hadoop.hbase.HRegionInfo;<a name="line.33"></a>
-<span class="sourceLineNo">034</span>import
org.apache.hadoop.hbase.HTableDescriptor;<a name="line.34"></a>
-<span class="sourceLineNo">035</span>import
org.apache.hadoop.hbase.classification.InterfaceAudience;<a name="line.35"></a>
-<span class="sourceLineNo">036</span>import
org.apache.hadoop.hbase.snapshot.RestoreSnapshotHelper;<a name="line.36"></a>
-<span class="sourceLineNo">037</span>import
org.apache.hadoop.hbase.util.FSUtils;<a name="line.37"></a>
-<span class="sourceLineNo">038</span><a name="line.38"></a>
-<span class="sourceLineNo">039</span>/**<a name="line.39"></a>
-<span class="sourceLineNo">040</span> * A Scanner which performs a scan over
snapshot files. Using this class requires copying the<a name="line.40"></a>
-<span class="sourceLineNo">041</span> * snapshot to a temporary empty
directory, which will copy the snapshot reference files into that<a
name="line.41"></a>
-<span class="sourceLineNo">042</span> * directory. Actual data files are not
copied.<a name="line.42"></a>
-<span class="sourceLineNo">043</span> *<a name="line.43"></a>
-<span class="sourceLineNo">044</span> * <p><a name="line.44"></a>
-<span class="sourceLineNo">045</span> * This also allows one to run the scan
from an<a name="line.45"></a>
-<span class="sourceLineNo">046</span> * online or offline hbase cluster. The
snapshot files can be exported by using the<a name="line.46"></a>
-<span class="sourceLineNo">047</span> * {@link
org.apache.hadoop.hbase.snapshot.ExportSnapshot} tool,<a name="line.47"></a>
-<span class="sourceLineNo">048</span> * to a pure-hdfs cluster, and this
scanner can be used to<a name="line.48"></a>
-<span class="sourceLineNo">049</span> * run the scan directly over the
snapshot files. The snapshot should not be deleted while there<a
name="line.49"></a>
-<span class="sourceLineNo">050</span> * are open scanners reading from
snapshot files.<a name="line.50"></a>
-<span class="sourceLineNo">051</span> *<a name="line.51"></a>
-<span class="sourceLineNo">052</span> * <p><a name="line.52"></a>
-<span class="sourceLineNo">053</span> * An internal RegionScanner is used to
execute the {@link Scan} obtained<a name="line.53"></a>
-<span class="sourceLineNo">054</span> * from the user for each region in the
snapshot.<a name="line.54"></a>
-<span class="sourceLineNo">055</span> * <p><a name="line.55"></a>
-<span class="sourceLineNo">056</span> * HBase owns all the data and snapshot
files on the filesystem. Only the HBase user can read from<a name="line.56"></a>
-<span class="sourceLineNo">057</span> * snapshot files and data files. HBase
also enforces security because all the requests are handled<a
name="line.57"></a>
-<span class="sourceLineNo">058</span> * by the server layer, and the user
cannot read from the data files directly. To read from snapshot<a
name="line.58"></a>
-<span class="sourceLineNo">059</span> * files directly from the file system,
the user who is running the MR job must have sufficient<a name="line.59"></a>
-<span class="sourceLineNo">060</span> * permissions to access snapshot and
reference files. This means that to run mapreduce over<a name="line.60"></a>
-<span class="sourceLineNo">061</span> * snapshot files, the job has to be run
as the HBase user or the user must have group or other<a name="line.61"></a>
-<span class="sourceLineNo">062</span> * priviledges in the filesystem (See
HBASE-8369). Note that, given other users access to read from<a
name="line.62"></a>
-<span class="sourceLineNo">063</span> * snapshot/data files will completely
circumvent the access control enforced by HBase.<a name="line.63"></a>
-<span class="sourceLineNo">064</span> * @see
org.apache.hadoop.hbase.mapreduce.TableSnapshotInputFormat<a name="line.64"></a>
-<span class="sourceLineNo">065</span> */<a name="line.65"></a>
-<span class="sourceLineNo">066</span>@InterfaceAudience.Public<a
name="line.66"></a>
-<span class="sourceLineNo">067</span>public class TableSnapshotScanner extends
AbstractClientScanner {<a name="line.67"></a>
-<span class="sourceLineNo">068</span><a name="line.68"></a>
-<span class="sourceLineNo">069</span> private static final Log LOG =
LogFactory.getLog(TableSnapshotScanner.class);<a name="line.69"></a>
-<span class="sourceLineNo">070</span><a name="line.70"></a>
-<span class="sourceLineNo">071</span> private Configuration conf;<a
name="line.71"></a>
-<span class="sourceLineNo">072</span> private String snapshotName;<a
name="line.72"></a>
-<span class="sourceLineNo">073</span> private FileSystem fs;<a
name="line.73"></a>
-<span class="sourceLineNo">074</span> private Path rootDir;<a
name="line.74"></a>
-<span class="sourceLineNo">075</span> private Path restoreDir;<a
name="line.75"></a>
-<span class="sourceLineNo">076</span> private Scan scan;<a name="line.76"></a>
-<span class="sourceLineNo">077</span> private ArrayList<HRegionInfo>
regions;<a name="line.77"></a>
-<span class="sourceLineNo">078</span> private HTableDescriptor htd;<a
name="line.78"></a>
-<span class="sourceLineNo">079</span><a name="line.79"></a>
-<span class="sourceLineNo">080</span> private ClientSideRegionScanner
currentRegionScanner = null;<a name="line.80"></a>
-<span class="sourceLineNo">081</span> private int currentRegion = -1;<a
name="line.81"></a>
-<span class="sourceLineNo">082</span><a name="line.82"></a>
-<span class="sourceLineNo">083</span> /**<a name="line.83"></a>
-<span class="sourceLineNo">084</span> * Creates a TableSnapshotScanner.<a
name="line.84"></a>
-<span class="sourceLineNo">085</span> * @param conf the configuration<a
name="line.85"></a>
-<span class="sourceLineNo">086</span> * @param restoreDir a temporary
directory to copy the snapshot files into. Current user should<a
name="line.86"></a>
-<span class="sourceLineNo">087</span> * have write permissions to this
directory, and this should not be a subdirectory of rootdir.<a
name="line.87"></a>
-<span class="sourceLineNo">088</span> * The scanner deletes the contents of
the directory once the scanner is closed.<a name="line.88"></a>
-<span class="sourceLineNo">089</span> * @param snapshotName the name of the
snapshot to read from<a name="line.89"></a>
-<span class="sourceLineNo">090</span> * @param scan a Scan representing scan
parameters<a name="line.90"></a>
-<span class="sourceLineNo">091</span> * @throws IOException in case of
error<a name="line.91"></a>
-<span class="sourceLineNo">092</span> */<a name="line.92"></a>
-<span class="sourceLineNo">093</span> public
TableSnapshotScanner(Configuration conf, Path restoreDir,<a name="line.93"></a>
-<span class="sourceLineNo">094</span> String snapshotName, Scan scan)
throws IOException {<a name="line.94"></a>
-<span class="sourceLineNo">095</span> this(conf, FSUtils.getRootDir(conf),
restoreDir, snapshotName, scan);<a name="line.95"></a>
-<span class="sourceLineNo">096</span> }<a name="line.96"></a>
-<span class="sourceLineNo">097</span><a name="line.97"></a>
-<span class="sourceLineNo">098</span> /**<a name="line.98"></a>
-<span class="sourceLineNo">099</span> * Creates a TableSnapshotScanner.<a
name="line.99"></a>
-<span class="sourceLineNo">100</span> * @param conf the configuration<a
name="line.100"></a>
-<span class="sourceLineNo">101</span> * @param rootDir root directory for
HBase.<a name="line.101"></a>
-<span class="sourceLineNo">102</span> * @param restoreDir a temporary
directory to copy the snapshot files into. Current user should<a
name="line.102"></a>
-<span class="sourceLineNo">103</span> * have write permissions to this
directory, and this should not be a subdirectory of rootdir.<a
name="line.103"></a>
-<span class="sourceLineNo">104</span> * The scanner deletes the contents of
the directory once the scanner is closed.<a name="line.104"></a>
-<span class="sourceLineNo">105</span> * @param snapshotName the name of the
snapshot to read from<a name="line.105"></a>
-<span class="sourceLineNo">106</span> * @param scan a Scan representing scan
parameters<a name="line.106"></a>
-<span class="sourceLineNo">107</span> * @throws IOException in case of
error<a name="line.107"></a>
-<span class="sourceLineNo">108</span> */<a name="line.108"></a>
-<span class="sourceLineNo">109</span> public
TableSnapshotScanner(Configuration conf, Path rootDir,<a name="line.109"></a>
-<span class="sourceLineNo">110</span> Path restoreDir, String
snapshotName, Scan scan) throws IOException {<a name="line.110"></a>
-<span class="sourceLineNo">111</span> this.conf = conf;<a
name="line.111"></a>
-<span class="sourceLineNo">112</span> this.snapshotName = snapshotName;<a
name="line.112"></a>
-<span class="sourceLineNo">113</span> this.rootDir = rootDir;<a
name="line.113"></a>
-<span class="sourceLineNo">114</span> // restoreDir will be deleted in
close(), use a unique sub directory<a name="line.114"></a>
-<span class="sourceLineNo">115</span> this.restoreDir = new
Path(restoreDir, UUID.randomUUID().toString());<a name="line.115"></a>
-<span class="sourceLineNo">116</span> this.scan = scan;<a
name="line.116"></a>
-<span class="sourceLineNo">117</span> this.fs =
rootDir.getFileSystem(conf);<a name="line.117"></a>
-<span class="sourceLineNo">118</span> init();<a name="line.118"></a>
-<span class="sourceLineNo">119</span> }<a name="line.119"></a>
-<span class="sourceLineNo">120</span><a name="line.120"></a>
-<span class="sourceLineNo">121</span> private void init() throws IOException
{<a name="line.121"></a>
-<span class="sourceLineNo">122</span> final
RestoreSnapshotHelper.RestoreMetaChanges meta =<a name="line.122"></a>
-<span class="sourceLineNo">123</span>
RestoreSnapshotHelper.copySnapshotForScanner(<a name="line.123"></a>
-<span class="sourceLineNo">124</span> conf, fs, rootDir, restoreDir,
snapshotName);<a name="line.124"></a>
-<span class="sourceLineNo">125</span> final List<HRegionInfo>
restoredRegions = meta.getRegionsToAdd();<a name="line.125"></a>
-<span class="sourceLineNo">126</span><a name="line.126"></a>
-<span class="sourceLineNo">127</span> htd = meta.getTableDescriptor();<a
name="line.127"></a>
-<span class="sourceLineNo">128</span> regions = new
ArrayList<>(restoredRegions.size());<a name="line.128"></a>
-<span class="sourceLineNo">129</span> for (HRegionInfo hri :
restoredRegions) {<a name="line.129"></a>
-<span class="sourceLineNo">130</span> if (hri.isOffline() &&
(hri.isSplit() || hri.isSplitParent())) {<a name="line.130"></a>
-<span class="sourceLineNo">131</span> continue;<a name="line.131"></a>
-<span class="sourceLineNo">132</span> }<a name="line.132"></a>
-<span class="sourceLineNo">133</span> if
(CellUtil.overlappingKeys(scan.getStartRow(), scan.getStopRow(),
hri.getStartKey(),<a name="line.133"></a>
-<span class="sourceLineNo">134</span> hri.getEndKey())) {<a
name="line.134"></a>
-<span class="sourceLineNo">135</span> regions.add(hri);<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><a name="line.138"></a>
-<span class="sourceLineNo">139</span> // sort for regions according to
startKey.<a name="line.139"></a>
-<span class="sourceLineNo">140</span> Collections.sort(regions);<a
name="line.140"></a>
-<span class="sourceLineNo">141</span> initScanMetrics(scan);<a
name="line.141"></a>
-<span class="sourceLineNo">142</span> }<a name="line.142"></a>
-<span class="sourceLineNo">143</span><a name="line.143"></a>
-<span class="sourceLineNo">144</span> @Override<a name="line.144"></a>
-<span class="sourceLineNo">145</span> public Result next() throws IOException
{<a name="line.145"></a>
-<span class="sourceLineNo">146</span> Result result = null;<a
name="line.146"></a>
-<span class="sourceLineNo">147</span> while (true) {<a name="line.147"></a>
-<span class="sourceLineNo">148</span> if (currentRegionScanner == null)
{<a name="line.148"></a>
-<span class="sourceLineNo">149</span> currentRegion++;<a
name="line.149"></a>
-<span class="sourceLineNo">150</span> if (currentRegion >=
regions.size()) {<a name="line.150"></a>
-<span class="sourceLineNo">151</span> return null;<a
name="line.151"></a>
-<span class="sourceLineNo">152</span> }<a name="line.152"></a>
-<span class="sourceLineNo">153</span><a name="line.153"></a>
-<span class="sourceLineNo">154</span> HRegionInfo hri =
regions.get(currentRegion);<a name="line.154"></a>
-<span class="sourceLineNo">155</span> currentRegionScanner = new
ClientSideRegionScanner(conf, fs,<a name="line.155"></a>
-<span class="sourceLineNo">156</span> restoreDir, htd, hri, scan,
scanMetrics);<a name="line.156"></a>
-<span class="sourceLineNo">157</span> if (this.scanMetrics != null) {<a
name="line.157"></a>
-<span class="sourceLineNo">158</span>
this.scanMetrics.countOfRegions.incrementAndGet();<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><a name="line.161"></a>
-<span class="sourceLineNo">162</span> try {<a name="line.162"></a>
-<span class="sourceLineNo">163</span> result =
currentRegionScanner.next();<a name="line.163"></a>
-<span class="sourceLineNo">164</span> if (result != null) {<a
name="line.164"></a>
-<span class="sourceLineNo">165</span> return result;<a
name="line.165"></a>
-<span class="sourceLineNo">166</span> }<a name="line.166"></a>
-<span class="sourceLineNo">167</span> } finally {<a name="line.167"></a>
-<span class="sourceLineNo">168</span> if (result == null) {<a
name="line.168"></a>
-<span class="sourceLineNo">169</span> currentRegionScanner.close();<a
name="line.169"></a>
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name="line.170"></a>
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name="line.177"></a>
-<span class="sourceLineNo">178</span> if (currentRegionScanner != null) {<a
name="line.178"></a>
-<span class="sourceLineNo">179</span> currentRegionScanner.close();<a
name="line.179"></a>
-<span class="sourceLineNo">180</span> }<a name="line.180"></a>
-<span class="sourceLineNo">181</span> try {<a name="line.181"></a>
-<span class="sourceLineNo">182</span> fs.delete(this.restoreDir, true);<a
name="line.182"></a>
-<span class="sourceLineNo">183</span> } catch (IOException ex) {<a
name="line.183"></a>
-<span class="sourceLineNo">184</span> LOG.warn("Could not delete restore
directory for the snapshot:" + ex);<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>
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-<span class="sourceLineNo">188</span> @Override<a name="line.188"></a>
-<span class="sourceLineNo">189</span> public boolean renewLease() {<a
name="line.189"></a>
-<span class="sourceLineNo">190</span> throw new
UnsupportedOperationException();<a name="line.190"></a>
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-<span class="sourceLineNo">192</span><a name="line.192"></a>
-<span class="sourceLineNo">193</span>}<a name="line.193"></a>
+<span class="sourceLineNo">034</span>import
org.apache.hadoop.hbase.classification.InterfaceAudience;<a name="line.34"></a>
+<span class="sourceLineNo">035</span>import
org.apache.hadoop.hbase.snapshot.RestoreSnapshotHelper;<a name="line.35"></a>
+<span class="sourceLineNo">036</span>import
org.apache.hadoop.hbase.util.FSUtils;<a name="line.36"></a>
+<span class="sourceLineNo">037</span><a name="line.37"></a>
+<span class="sourceLineNo">038</span>/**<a name="line.38"></a>
+<span class="sourceLineNo">039</span> * A Scanner which performs a scan over
snapshot files. Using this class requires copying the<a name="line.39"></a>
+<span class="sourceLineNo">040</span> * snapshot to a temporary empty
directory, which will copy the snapshot reference files into that<a
name="line.40"></a>
+<span class="sourceLineNo">041</span> * directory. Actual data files are not
copied.<a name="line.41"></a>
+<span class="sourceLineNo">042</span> *<a name="line.42"></a>
+<span class="sourceLineNo">043</span> * <p><a name="line.43"></a>
+<span class="sourceLineNo">044</span> * This also allows one to run the scan
from an<a name="line.44"></a>
+<span class="sourceLineNo">045</span> * online or offline hbase cluster. The
snapshot files can be exported by using the<a name="line.45"></a>
+<span class="sourceLineNo">046</span> * {@link
org.apache.hadoop.hbase.snapshot.ExportSnapshot} tool,<a name="line.46"></a>
+<span class="sourceLineNo">047</span> * to a pure-hdfs cluster, and this
scanner can be used to<a name="line.47"></a>
+<span class="sourceLineNo">048</span> * run the scan directly over the
snapshot files. The snapshot should not be deleted while there<a
name="line.48"></a>
+<span class="sourceLineNo">049</span> * are open scanners reading from
snapshot files.<a name="line.49"></a>
+<span class="sourceLineNo">050</span> *<a name="line.50"></a>
+<span class="sourceLineNo">051</span> * <p><a name="line.51"></a>
+<span class="sourceLineNo">052</span> * An internal RegionScanner is used to
execute the {@link Scan} obtained<a name="line.52"></a>
+<span class="sourceLineNo">053</span> * from the user for each region in the
snapshot.<a name="line.53"></a>
+<span class="sourceLineNo">054</span> * <p><a name="line.54"></a>
+<span class="sourceLineNo">055</span> * HBase owns all the data and snapshot
files on the filesystem. Only the HBase user can read from<a name="line.55"></a>
+<span class="sourceLineNo">056</span> * snapshot files and data files. HBase
also enforces security because all the requests are handled<a
name="line.56"></a>
+<span class="sourceLineNo">057</span> * by the server layer, and the user
cannot read from the data files directly. To read from snapshot<a
name="line.57"></a>
+<span class="sourceLineNo">058</span> * files directly from the file system,
the user who is running the MR job must have sufficient<a name="line.58"></a>
+<span class="sourceLineNo">059</span> * permissions to access snapshot and
reference files. This means that to run mapreduce over<a name="line.59"></a>
+<span class="sourceLineNo">060</span> * snapshot files, the job has to be run
as the HBase user or the user must have group or other<a name="line.60"></a>
+<span class="sourceLineNo">061</span> * priviledges in the filesystem (See
HBASE-8369). Note that, given other users access to read from<a
name="line.61"></a>
+<span class="sourceLineNo">062</span> * snapshot/data files will completely
circumvent the access control enforced by HBase.<a name="line.62"></a>
+<span class="sourceLineNo">063</span> * @see
org.apache.hadoop.hbase.mapreduce.TableSnapshotInputFormat<a name="line.63"></a>
+<span class="sourceLineNo">064</span> */<a name="line.64"></a>
+<span class="sourceLineNo">065</span>@InterfaceAudience.Public<a
name="line.65"></a>
+<span class="sourceLineNo">066</span>public class TableSnapshotScanner extends
AbstractClientScanner {<a name="line.66"></a>
+<span class="sourceLineNo">067</span><a name="line.67"></a>
+<span class="sourceLineNo">068</span> private static final Log LOG =
LogFactory.getLog(TableSnapshotScanner.class);<a name="line.68"></a>
+<span class="sourceLineNo">069</span><a name="line.69"></a>
+<span class="sourceLineNo">070</span> private Configuration conf;<a
name="line.70"></a>
+<span class="sourceLineNo">071</span> private String snapshotName;<a
name="line.71"></a>
+<span class="sourceLineNo">072</span> private FileSystem fs;<a
name="line.72"></a>
+<span class="sourceLineNo">073</span> private Path rootDir;<a
name="line.73"></a>
+<span class="sourceLineNo">074</span> private Path restoreDir;<a
name="line.74"></a>
+<span class="sourceLineNo">075</span> private Scan scan;<a name="line.75"></a>
+<span class="sourceLineNo">076</span> private ArrayList<HRegionInfo>
regions;<a name="line.76"></a>
+<span class="sourceLineNo">077</span> private TableDescriptor htd;<a
name="line.77"></a>
+<span class="sourceLineNo">078</span><a name="line.78"></a>
+<span class="sourceLineNo">079</span> private ClientSideRegionScanner
currentRegionScanner = null;<a name="line.79"></a>
+<span class="sourceLineNo">080</span> private int currentRegion = -1;<a
name="line.80"></a>
+<span class="sourceLineNo">081</span><a name="line.81"></a>
+<span class="sourceLineNo">082</span> /**<a name="line.82"></a>
+<span class="sourceLineNo">083</span> * Creates a TableSnapshotScanner.<a
name="line.83"></a>
+<span class="sourceLineNo">084</span> * @param conf the configuration<a
name="line.84"></a>
+<span class="sourceLineNo">085</span> * @param restoreDir a temporary
directory to copy the snapshot files into. Current user should<a
name="line.85"></a>
+<span class="sourceLineNo">086</span> * have write permissions to this
directory, and this should not be a subdirectory of rootdir.<a
name="line.86"></a>
+<span class="sourceLineNo">087</span> * The scanner deletes the contents of
the directory once the scanner is closed.<a name="line.87"></a>
+<span class="sourceLineNo">088</span> * @param snapshotName the name of the
snapshot to read from<a name="line.88"></a>
+<span class="sourceLineNo">089</span> * @param scan a Scan representing scan
parameters<a name="line.89"></a>
+<span class="sourceLineNo">090</span> * @throws IOException in case of
error<a name="line.90"></a>
+<span class="sourceLineNo">091</span> */<a name="line.91"></a>
+<span class="sourceLineNo">092</span> public
TableSnapshotScanner(Configuration conf, Path restoreDir,<a name="line.92"></a>
+<span class="sourceLineNo">093</span> String snapshotName, Scan scan)
throws IOException {<a name="line.93"></a>
+<span class="sourceLineNo">094</span> this(conf, FSUtils.getRootDir(conf),
restoreDir, snapshotName, scan);<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> /**<a name="line.97"></a>
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name="line.98"></a>
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name="line.99"></a>
+<span class="sourceLineNo">100</span> * @param rootDir root directory for
HBase.<a name="line.100"></a>
+<span class="sourceLineNo">101</span> * @param restoreDir a temporary
directory to copy the snapshot files into. Current user should<a
name="line.101"></a>
+<span class="sourceLineNo">102</span> * have write permissions to this
directory, and this should not be a subdirectory of rootdir.<a
name="line.102"></a>
+<span class="sourceLineNo">103</span> * The scanner deletes the contents of
the directory once the scanner is closed.<a name="line.103"></a>
+<span class="sourceLineNo">104</span> * @param snapshotName the name of the
snapshot to read from<a name="line.104"></a>
+<span class="sourceLineNo">105</span> * @param scan a Scan representing scan
parameters<a name="line.105"></a>
+<span class="sourceLineNo">106</span> * @throws IOException in case of
error<a name="line.106"></a>
+<span class="sourceLineNo">107</span> */<a name="line.107"></a>
+<span class="sourceLineNo">108</span> public
TableSnapshotScanner(Configuration conf, Path rootDir,<a name="line.108"></a>
+<span class="sourceLineNo">109</span> Path restoreDir, String
snapshotName, Scan scan) throws IOException {<a name="line.109"></a>
+<span class="sourceLineNo">110</span> this.conf = conf;<a
name="line.110"></a>
+<span class="sourceLineNo">111</span> this.snapshotName = snapshotName;<a
name="line.111"></a>
+<span class="sourceLineNo">112</span> this.rootDir = rootDir;<a
name="line.112"></a>
+<span class="sourceLineNo">113</span> // restoreDir will be deleted in
close(), use a unique sub directory<a name="line.113"></a>
+<span class="sourceLineNo">114</span> this.restoreDir = new
Path(restoreDir, UUID.randomUUID().toString());<a name="line.114"></a>
+<span class="sourceLineNo">115</span> this.scan = scan;<a
name="line.115"></a>
+<span class="sourceLineNo">116</span> this.fs =
rootDir.getFileSystem(conf);<a name="line.116"></a>
+<span class="sourceLineNo">117</span> init();<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> private void init() throws IOException
{<a name="line.120"></a>
+<span class="sourceLineNo">121</span> final
RestoreSnapshotHelper.RestoreMetaChanges meta =<a name="line.121"></a>
+<span class="sourceLineNo">122</span>
RestoreSnapshotHelper.copySnapshotForScanner(<a name="line.122"></a>
+<span class="sourceLineNo">123</span> conf, fs, rootDir, restoreDir,
snapshotName);<a name="line.123"></a>
+<span class="sourceLineNo">124</span> final List<HRegionInfo>
restoredRegions = meta.getRegionsToAdd();<a name="line.124"></a>
+<span class="sourceLineNo">125</span><a name="line.125"></a>
+<span class="sourceLineNo">126</span> htd = meta.getTableDescriptor();<a
name="line.126"></a>
+<span class="sourceLineNo">127</span> regions = new
ArrayList<>(restoredRegions.size());<a name="line.127"></a>
+<span class="sourceLineNo">128</span> for (HRegionInfo hri :
restoredRegions) {<a name="line.128"></a>
+<span class="sourceLineNo">129</span> if (hri.isOffline() &&
(hri.isSplit() || hri.isSplitParent())) {<a name="line.129"></a>
+<span class="sourceLineNo">130</span> continue;<a name="line.130"></a>
+<span class="sourceLineNo">131</span> }<a name="line.131"></a>
+<span class="sourceLineNo">132</span> if
(CellUtil.overlappingKeys(scan.getStartRow(), scan.getStopRow(),
hri.getStartKey(),<a name="line.132"></a>
+<span class="sourceLineNo">133</span> hri.getEndKey())) {<a
name="line.133"></a>
+<span class="sourceLineNo">134</span> regions.add(hri);<a
name="line.134"></a>
+<span class="sourceLineNo">135</span> }<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> // sort for regions according to
startKey.<a name="line.138"></a>
+<span class="sourceLineNo">139</span> Collections.sort(regions);<a
name="line.139"></a>
+<span class="sourceLineNo">140</span> initScanMetrics(scan);<a
name="line.140"></a>
+<span class="sourceLineNo">141</span> }<a name="line.141"></a>
+<span class="sourceLineNo">142</span><a name="line.142"></a>
+<span class="sourceLineNo">143</span> @Override<a name="line.143"></a>
+<span class="sourceLineNo">144</span> public Result next() throws IOException
{<a name="line.144"></a>
+<span class="sourceLineNo">145</span> Result result = null;<a
name="line.145"></a>
+<span class="sourceLineNo">146</span> while (true) {<a name="line.146"></a>
+<span class="sourceLineNo">147</span> if (currentRegionScanner == null)
{<a name="line.147"></a>
+<span class="sourceLineNo">148</span> currentRegion++;<a
name="line.148"></a>
+<span class="sourceLineNo">149</span> if (currentRegion >=
regions.size()) {<a name="line.149"></a>
+<span class="sourceLineNo">150</span> return null;<a
name="line.150"></a>
+<span class="sourceLineNo">151</span> }<a name="line.151"></a>
+<span class="sourceLineNo">152</span><a name="line.152"></a>
+<span class="sourceLineNo">153</span> HRegionInfo hri =
regions.get(currentRegion);<a name="line.153"></a>
+<span class="sourceLineNo">154</span> currentRegionScanner = new
ClientSideRegionScanner(conf, fs,<a name="line.154"></a>
+<span class="sourceLineNo">155</span> restoreDir, htd, hri, scan,
scanMetrics);<a name="line.155"></a>
+<span class="sourceLineNo">156</span> if (this.scanMetrics != null) {<a
name="line.156"></a>
+<span class="sourceLineNo">157</span>
this.scanMetrics.countOfRegions.incrementAndGet();<a name="line.157"></a>
+<span class="sourceLineNo">158</span> }<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> try {<a name="line.161"></a>
+<span class="sourceLineNo">162</span> result =
currentRegionScanner.next();<a name="line.162"></a>
+<span class="sourceLineNo">163</span> if (result != null) {<a
name="line.163"></a>
+<span class="sourceLineNo">164</span> return result;<a
name="line.164"></a>
+<span class="sourceLineNo">165</span> }<a name="line.165"></a>
+<span class="sourceLineNo">166</span> } finally {<a name="line.166"></a>
+<span class="sourceLineNo">167</span> if (result == null) {<a
name="line.167"></a>
+<span class="sourceLineNo">168</span> currentRegionScanner.close();<a
name="line.168"></a>
+<span class="sourceLineNo">169</span> currentRegionScanner = null;<a
name="line.169"></a>
+<span class="sourceLineNo">170</span> }<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> }<a name="line.173"></a>
+<span class="sourceLineNo">174</span><a name="line.174"></a>
+<span class="sourceLineNo">175</span> @Override<a name="line.175"></a>
+<span class="sourceLineNo">176</span> public void close() {<a
name="line.176"></a>
+<span class="sourceLineNo">177</span> if (currentRegionScanner != null) {<a
name="line.177"></a>
+<span class="sourceLineNo">178</span> currentRegionScanner.close();<a
name="line.178"></a>
+<span class="sourceLineNo">179</span> }<a name="line.179"></a>
+<span class="sourceLineNo">180</span> try {<a name="line.180"></a>
+<span class="sourceLineNo">181</span> fs.delete(this.restoreDir, true);<a
name="line.181"></a>
+<span class="sourceLineNo">182</span> } catch (IOException ex) {<a
name="line.182"></a>
+<span class="sourceLineNo">183</span> LOG.warn("Could not delete restore
directory for the snapshot:" + ex);<a name="line.183"></a>
+<span class="sourceLineNo">184</span> }<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> @Override<a name="line.187"></a>
+<span class="sourceLineNo">188</span> public boolean renewLease() {<a
name="line.188"></a>
+<span class="sourceLineNo">189</span> throw new
UnsupportedOperationException();<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>}<a name="line.192"></a>