http://git-wip-us.apache.org/repos/asf/hbase-site/blob/b9722a17/devapidocs/src-html/org/apache/hadoop/hbase/master/assignment/RegionStateStore.RegionStateVisitor.html
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diff --git
a/devapidocs/src-html/org/apache/hadoop/hbase/master/assignment/RegionStateStore.RegionStateVisitor.html
b/devapidocs/src-html/org/apache/hadoop/hbase/master/assignment/RegionStateStore.RegionStateVisitor.html
index 84e9e52..252bcc2 100644
---
a/devapidocs/src-html/org/apache/hadoop/hbase/master/assignment/RegionStateStore.RegionStateVisitor.html
+++
b/devapidocs/src-html/org/apache/hadoop/hbase/master/assignment/RegionStateStore.RegionStateVisitor.html
@@ -56,290 +56,293 @@
<span class="sourceLineNo">048</span>import
org.apache.yetus.audience.InterfaceAudience;<a name="line.48"></a>
<span class="sourceLineNo">049</span>import
org.apache.zookeeper.KeeperException;<a name="line.49"></a>
<span class="sourceLineNo">050</span><a name="line.50"></a>
-<span class="sourceLineNo">051</span>import
org.apache.hadoop.hbase.shaded.com.google.common.base.Preconditions;<a
name="line.51"></a>
-<span class="sourceLineNo">052</span><a name="line.52"></a>
-<span class="sourceLineNo">053</span>/**<a name="line.53"></a>
-<span class="sourceLineNo">054</span> * Store Region State to hbase:meta
table.<a name="line.54"></a>
-<span class="sourceLineNo">055</span> */<a name="line.55"></a>
-<span class="sourceLineNo">056</span>@InterfaceAudience.Private<a
name="line.56"></a>
-<span class="sourceLineNo">057</span>public class RegionStateStore {<a
name="line.57"></a>
-<span class="sourceLineNo">058</span> private static final Log LOG =
LogFactory.getLog(RegionStateStore.class);<a name="line.58"></a>
-<span class="sourceLineNo">059</span><a name="line.59"></a>
-<span class="sourceLineNo">060</span> /** The delimiter for meta columns for
replicaIds &gt; 0 */<a name="line.60"></a>
-<span class="sourceLineNo">061</span> protected static final char
META_REPLICA_ID_DELIMITER = '_';<a name="line.61"></a>
-<span class="sourceLineNo">062</span><a name="line.62"></a>
-<span class="sourceLineNo">063</span> private final MasterServices master;<a
name="line.63"></a>
-<span class="sourceLineNo">064</span><a name="line.64"></a>
-<span class="sourceLineNo">065</span> private MultiHConnection
multiHConnection;<a name="line.65"></a>
-<span class="sourceLineNo">066</span><a name="line.66"></a>
-<span class="sourceLineNo">067</span> public RegionStateStore(final
MasterServices master) {<a name="line.67"></a>
-<span class="sourceLineNo">068</span> this.master = master;<a
name="line.68"></a>
-<span class="sourceLineNo">069</span> }<a name="line.69"></a>
-<span class="sourceLineNo">070</span><a name="line.70"></a>
-<span class="sourceLineNo">071</span> public void start() throws IOException
{<a name="line.71"></a>
-<span class="sourceLineNo">072</span> }<a name="line.72"></a>
-<span class="sourceLineNo">073</span><a name="line.73"></a>
-<span class="sourceLineNo">074</span> public void stop() {<a
name="line.74"></a>
-<span class="sourceLineNo">075</span> if (multiHConnection != null) {<a
name="line.75"></a>
-<span class="sourceLineNo">076</span> multiHConnection.close();<a
name="line.76"></a>
-<span class="sourceLineNo">077</span> multiHConnection = null;<a
name="line.77"></a>
-<span class="sourceLineNo">078</span> }<a name="line.78"></a>
-<span class="sourceLineNo">079</span> }<a name="line.79"></a>
-<span class="sourceLineNo">080</span><a name="line.80"></a>
-<span class="sourceLineNo">081</span> public interface RegionStateVisitor {<a
name="line.81"></a>
-<span class="sourceLineNo">082</span> void visitRegionState(RegionInfo
regionInfo, State state,<a name="line.82"></a>
-<span class="sourceLineNo">083</span> ServerName regionLocation,
ServerName lastHost, long openSeqNum);<a name="line.83"></a>
-<span class="sourceLineNo">084</span> }<a name="line.84"></a>
-<span class="sourceLineNo">085</span><a name="line.85"></a>
-<span class="sourceLineNo">086</span> public void visitMeta(final
RegionStateVisitor visitor) throws IOException {<a name="line.86"></a>
-<span class="sourceLineNo">087</span>
MetaTableAccessor.fullScanRegions(master.getConnection(), new
MetaTableAccessor.Visitor() {<a name="line.87"></a>
-<span class="sourceLineNo">088</span> final boolean isDebugEnabled =
LOG.isDebugEnabled();<a name="line.88"></a>
-<span class="sourceLineNo">089</span><a name="line.89"></a>
-<span class="sourceLineNo">090</span> @Override<a name="line.90"></a>
-<span class="sourceLineNo">091</span> public boolean visit(final Result
r) throws IOException {<a name="line.91"></a>
-<span class="sourceLineNo">092</span> if (r != null &&
!r.isEmpty()) {<a name="line.92"></a>
-<span class="sourceLineNo">093</span> long st = 0;<a
name="line.93"></a>
-<span class="sourceLineNo">094</span> if (LOG.isTraceEnabled()) {<a
name="line.94"></a>
-<span class="sourceLineNo">095</span> st =
System.currentTimeMillis();<a name="line.95"></a>
-<span class="sourceLineNo">096</span> }<a name="line.96"></a>
-<span class="sourceLineNo">097</span> visitMetaEntry(visitor, r);<a
name="line.97"></a>
-<span class="sourceLineNo">098</span> if (LOG.isTraceEnabled()) {<a
name="line.98"></a>
-<span class="sourceLineNo">099</span> long et =
System.currentTimeMillis();<a name="line.99"></a>
-<span class="sourceLineNo">100</span> LOG.trace("[T] LOAD META PERF
" + StringUtils.humanTimeDiff(et - st));<a name="line.100"></a>
-<span class="sourceLineNo">101</span> }<a name="line.101"></a>
-<span class="sourceLineNo">102</span> } else if (isDebugEnabled) {<a
name="line.102"></a>
-<span class="sourceLineNo">103</span> LOG.debug("NULL result from
meta - ignoring but this is strange.");<a name="line.103"></a>
-<span class="sourceLineNo">104</span> }<a name="line.104"></a>
-<span class="sourceLineNo">105</span> return true;<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> }<a name="line.108"></a>
-<span class="sourceLineNo">109</span><a name="line.109"></a>
-<span class="sourceLineNo">110</span> private void visitMetaEntry(final
RegionStateVisitor visitor, final Result result)<a name="line.110"></a>
-<span class="sourceLineNo">111</span> throws IOException {<a
name="line.111"></a>
-<span class="sourceLineNo">112</span> final RegionLocations rl =
MetaTableAccessor.getRegionLocations(result);<a name="line.112"></a>
-<span class="sourceLineNo">113</span> if (rl == null) return;<a
name="line.113"></a>
-<span class="sourceLineNo">114</span><a name="line.114"></a>
-<span class="sourceLineNo">115</span> final HRegionLocation[] locations =
rl.getRegionLocations();<a name="line.115"></a>
-<span class="sourceLineNo">116</span> if (locations == null) return;<a
name="line.116"></a>
-<span class="sourceLineNo">117</span><a name="line.117"></a>
-<span class="sourceLineNo">118</span> for (int i = 0; i <
locations.length; ++i) {<a name="line.118"></a>
-<span class="sourceLineNo">119</span> final HRegionLocation hrl =
locations[i];<a name="line.119"></a>
-<span class="sourceLineNo">120</span> if (hrl == null) continue;<a
name="line.120"></a>
-<span class="sourceLineNo">121</span><a name="line.121"></a>
-<span class="sourceLineNo">122</span> final RegionInfo regionInfo =
hrl.getRegionInfo();<a name="line.122"></a>
-<span class="sourceLineNo">123</span> if (regionInfo == null) continue;<a
name="line.123"></a>
-<span class="sourceLineNo">124</span><a name="line.124"></a>
-<span class="sourceLineNo">125</span> final int replicaId =
regionInfo.getReplicaId();<a name="line.125"></a>
-<span class="sourceLineNo">126</span> final State state =
getRegionState(result, replicaId);<a name="line.126"></a>
-<span class="sourceLineNo">127</span><a name="line.127"></a>
-<span class="sourceLineNo">128</span> final ServerName lastHost =
hrl.getServerName();<a name="line.128"></a>
-<span class="sourceLineNo">129</span> final ServerName regionLocation =
getRegionServer(result, replicaId);<a name="line.129"></a>
-<span class="sourceLineNo">130</span> final long openSeqNum = -1;<a
name="line.130"></a>
-<span class="sourceLineNo">131</span><a name="line.131"></a>
-<span class="sourceLineNo">132</span> // TODO: move under trace, now is
visible for debugging<a name="line.132"></a>
-<span class="sourceLineNo">133</span> LOG.info(String.format("Load
hbase:meta entry region=%s regionState=%s lastHost=%s regionLocation=%s",<a
name="line.133"></a>
-<span class="sourceLineNo">134</span> regionInfo, state, lastHost,
regionLocation));<a name="line.134"></a>
-<span class="sourceLineNo">135</span><a name="line.135"></a>
-<span class="sourceLineNo">136</span>
visitor.visitRegionState(regionInfo, state, regionLocation, lastHost,
openSeqNum);<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><a name="line.139"></a>
-<span class="sourceLineNo">140</span> public void updateRegionLocation(final
RegionInfo regionInfo, final State state,<a name="line.140"></a>
-<span class="sourceLineNo">141</span> final ServerName regionLocation,
final ServerName lastHost, final long openSeqNum,<a name="line.141"></a>
-<span class="sourceLineNo">142</span> final long pid)<a
name="line.142"></a>
-<span class="sourceLineNo">143</span> throws IOException {<a
name="line.143"></a>
-<span class="sourceLineNo">144</span> if (regionInfo.isMetaRegion()) {<a
name="line.144"></a>
-<span class="sourceLineNo">145</span> updateMetaLocation(regionInfo,
regionLocation);<a name="line.145"></a>
-<span class="sourceLineNo">146</span> } else {<a name="line.146"></a>
-<span class="sourceLineNo">147</span>
updateUserRegionLocation(regionInfo, state, regionLocation, lastHost,
openSeqNum, pid);<a name="line.147"></a>
-<span class="sourceLineNo">148</span> }<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> public void updateRegionState(final
long openSeqNum, final long pid,<a name="line.151"></a>
-<span class="sourceLineNo">152</span> final RegionState newState, final
RegionState oldState) throws IOException {<a name="line.152"></a>
-<span class="sourceLineNo">153</span>
updateRegionLocation(newState.getRegion(), newState.getState(),
newState.getServerName(),<a name="line.153"></a>
-<span class="sourceLineNo">154</span> oldState != null ?
oldState.getServerName() : null, openSeqNum, pid);<a name="line.154"></a>
-<span class="sourceLineNo">155</span> }<a name="line.155"></a>
-<span class="sourceLineNo">156</span><a name="line.156"></a>
-<span class="sourceLineNo">157</span> protected void updateMetaLocation(final
RegionInfo regionInfo, final ServerName serverName)<a name="line.157"></a>
-<span class="sourceLineNo">158</span> throws IOException {<a
name="line.158"></a>
-<span class="sourceLineNo">159</span> try {<a name="line.159"></a>
-<span class="sourceLineNo">160</span>
MetaTableLocator.setMetaLocation(master.getZooKeeper(), serverName,<a
name="line.160"></a>
-<span class="sourceLineNo">161</span> regionInfo.getReplicaId(),
State.OPEN);<a name="line.161"></a>
-<span class="sourceLineNo">162</span> } catch (KeeperException e) {<a
name="line.162"></a>
-<span class="sourceLineNo">163</span> throw new IOException(e);<a
name="line.163"></a>
-<span class="sourceLineNo">164</span> }<a name="line.164"></a>
-<span class="sourceLineNo">165</span> }<a name="line.165"></a>
-<span class="sourceLineNo">166</span><a name="line.166"></a>
-<span class="sourceLineNo">167</span> protected void
updateUserRegionLocation(final RegionInfo regionInfo, final State state,<a
name="line.167"></a>
-<span class="sourceLineNo">168</span> final ServerName regionLocation,
final ServerName lastHost, final long openSeqNum,<a name="line.168"></a>
-<span class="sourceLineNo">169</span> final long pid)<a
name="line.169"></a>
-<span class="sourceLineNo">170</span> throws IOException {<a
name="line.170"></a>
-<span class="sourceLineNo">171</span> final int replicaId =
regionInfo.getReplicaId();<a name="line.171"></a>
-<span class="sourceLineNo">172</span> final Put put = new
Put(MetaTableAccessor.getMetaKeyForRegion(regionInfo));<a name="line.172"></a>
-<span class="sourceLineNo">173</span> MetaTableAccessor.addRegionInfo(put,
regionInfo);<a name="line.173"></a>
-<span class="sourceLineNo">174</span> final StringBuilder info = new
StringBuilder("pid=" + pid + " updating hbase:meta row=");<a
name="line.174"></a>
-<span class="sourceLineNo">175</span>
info.append(regionInfo.getRegionNameAsString()).append(",
regionState=").append(state);<a name="line.175"></a>
-<span class="sourceLineNo">176</span> if (openSeqNum >= 0) {<a
name="line.176"></a>
-<span class="sourceLineNo">177</span> Preconditions.checkArgument(state
== State.OPEN && regionLocation != null,<a name="line.177"></a>
-<span class="sourceLineNo">178</span> "Open region should be on a
server");<a name="line.178"></a>
-<span class="sourceLineNo">179</span> MetaTableAccessor.addLocation(put,
regionLocation, openSeqNum, -1, replicaId);<a name="line.179"></a>
-<span class="sourceLineNo">180</span> info.append(",
openSeqNum=").append(openSeqNum);<a name="line.180"></a>
-<span class="sourceLineNo">181</span> info.append(",
regionLocation=").append(regionLocation);<a name="line.181"></a>
-<span class="sourceLineNo">182</span> } else if (regionLocation != null
&& !regionLocation.equals(lastHost)) {<a name="line.182"></a>
-<span class="sourceLineNo">183</span> // Ideally, if no regionLocation,
write null to the hbase:meta but this will confuse clients<a
name="line.183"></a>
-<span class="sourceLineNo">184</span> // currently; they want a server to
hit. TODO: Make clients wait if no location.<a name="line.184"></a>
-<span class="sourceLineNo">185</span>
put.addImmutable(HConstants.CATALOG_FAMILY, getServerNameColumn(replicaId),<a
name="line.185"></a>
-<span class="sourceLineNo">186</span>
Bytes.toBytes(regionLocation.getServerName()));<a name="line.186"></a>
-<span class="sourceLineNo">187</span> info.append(",
regionLocation=").append(regionLocation);<a name="line.187"></a>
-<span class="sourceLineNo">188</span> }<a name="line.188"></a>
-<span class="sourceLineNo">189</span>
put.addImmutable(HConstants.CATALOG_FAMILY, getStateColumn(replicaId),<a
name="line.189"></a>
-<span class="sourceLineNo">190</span> Bytes.toBytes(state.name()));<a
name="line.190"></a>
-<span class="sourceLineNo">191</span> LOG.info(info);<a name="line.191"></a>
-<span class="sourceLineNo">192</span><a name="line.192"></a>
-<span class="sourceLineNo">193</span> final boolean serialReplication =
hasSerialReplicationScope(regionInfo.getTable());<a name="line.193"></a>
-<span class="sourceLineNo">194</span> if (serialReplication &&
state == State.OPEN) {<a name="line.194"></a>
-<span class="sourceLineNo">195</span> Put barrierPut =
MetaTableAccessor.makeBarrierPut(regionInfo.getEncodedNameAsBytes(),<a
name="line.195"></a>
-<span class="sourceLineNo">196</span> openSeqNum,
regionInfo.getTable().getName());<a name="line.196"></a>
-<span class="sourceLineNo">197</span> updateRegionLocation(regionInfo,
state, put, barrierPut);<a name="line.197"></a>
-<span class="sourceLineNo">198</span> } else {<a name="line.198"></a>
-<span class="sourceLineNo">199</span> updateRegionLocation(regionInfo,
state, put);<a name="line.199"></a>
-<span class="sourceLineNo">200</span> }<a name="line.200"></a>
-<span class="sourceLineNo">201</span> }<a name="line.201"></a>
-<span class="sourceLineNo">202</span><a name="line.202"></a>
-<span class="sourceLineNo">203</span> protected void
updateRegionLocation(final RegionInfo regionInfo, final State state,<a
name="line.203"></a>
-<span class="sourceLineNo">204</span> final Put... put) throws
IOException {<a name="line.204"></a>
-<span class="sourceLineNo">205</span> synchronized (this) {<a
name="line.205"></a>
-<span class="sourceLineNo">206</span> if (multiHConnection == null) {<a
name="line.206"></a>
-<span class="sourceLineNo">207</span> multiHConnection = new
MultiHConnection(master.getConfiguration(), 1);<a name="line.207"></a>
-<span class="sourceLineNo">208</span> }<a name="line.208"></a>
-<span class="sourceLineNo">209</span> }<a name="line.209"></a>
-<span class="sourceLineNo">210</span><a name="line.210"></a>
-<span class="sourceLineNo">211</span> try {<a name="line.211"></a>
-<span class="sourceLineNo">212</span>
multiHConnection.processBatchCallback(Arrays.asList(put),
TableName.META_TABLE_NAME, null, null);<a name="line.212"></a>
-<span class="sourceLineNo">213</span> } catch (IOException e) {<a
name="line.213"></a>
-<span class="sourceLineNo">214</span> // TODO: Revist!!!! Means that if a
server is loaded, then we will abort our host!<a name="line.214"></a>
-<span class="sourceLineNo">215</span> // In tests we abort the Master!<a
name="line.215"></a>
-<span class="sourceLineNo">216</span> String msg = String.format("FAILED
persisting region=%s state=%s",<a name="line.216"></a>
-<span class="sourceLineNo">217</span> regionInfo.getShortNameToLog(),
state);<a name="line.217"></a>
-<span class="sourceLineNo">218</span> LOG.error(msg, e);<a
name="line.218"></a>
-<span class="sourceLineNo">219</span> master.abort(msg, e);<a
name="line.219"></a>
-<span class="sourceLineNo">220</span> throw e;<a name="line.220"></a>
-<span class="sourceLineNo">221</span> }<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> // Update Region Splitting State
helpers<a name="line.225"></a>
-<span class="sourceLineNo">226</span> //
============================================================================================<a
name="line.226"></a>
-<span class="sourceLineNo">227</span> public void splitRegion(final
RegionInfo parent, final RegionInfo hriA,<a name="line.227"></a>
-<span class="sourceLineNo">228</span> final RegionInfo hriB, final
ServerName serverName) throws IOException {<a name="line.228"></a>
-<span class="sourceLineNo">229</span> final TableDescriptor htd =
getTableDescriptor(parent.getTable());<a name="line.229"></a>
-<span class="sourceLineNo">230</span>
MetaTableAccessor.splitRegion(master.getConnection(), parent, hriA, hriB,
serverName,<a name="line.230"></a>
-<span class="sourceLineNo">231</span> getRegionReplication(htd),
hasSerialReplicationScope(htd));<a name="line.231"></a>
-<span class="sourceLineNo">232</span> }<a name="line.232"></a>
-<span class="sourceLineNo">233</span><a name="line.233"></a>
-<span class="sourceLineNo">234</span> //
============================================================================================<a
name="line.234"></a>
-<span class="sourceLineNo">235</span> // Update Region Merging State
helpers<a name="line.235"></a>
-<span class="sourceLineNo">236</span> //
============================================================================================<a
name="line.236"></a>
-<span class="sourceLineNo">237</span> public void mergeRegions(final
RegionInfo parent, final RegionInfo hriA,<a name="line.237"></a>
-<span class="sourceLineNo">238</span> final RegionInfo hriB, final
ServerName serverName) throws IOException {<a name="line.238"></a>
-<span class="sourceLineNo">239</span> final TableDescriptor htd =
getTableDescriptor(parent.getTable());<a name="line.239"></a>
-<span class="sourceLineNo">240</span>
MetaTableAccessor.mergeRegions(master.getConnection(), parent, hriA, hriB,
serverName,<a name="line.240"></a>
-<span class="sourceLineNo">241</span> getRegionReplication(htd),
EnvironmentEdgeManager.currentTime(),<a name="line.241"></a>
-<span class="sourceLineNo">242</span>
hasSerialReplicationScope(htd));<a name="line.242"></a>
-<span class="sourceLineNo">243</span> }<a name="line.243"></a>
-<span class="sourceLineNo">244</span><a name="line.244"></a>
-<span class="sourceLineNo">245</span> //
============================================================================================<a
name="line.245"></a>
-<span class="sourceLineNo">246</span> // Delete Region State helpers<a
name="line.246"></a>
-<span class="sourceLineNo">247</span> //
============================================================================================<a
name="line.247"></a>
-<span class="sourceLineNo">248</span> public void deleteRegion(final
RegionInfo regionInfo) throws IOException {<a name="line.248"></a>
-<span class="sourceLineNo">249</span>
deleteRegions(Collections.singletonList(regionInfo));<a name="line.249"></a>
-<span class="sourceLineNo">250</span> }<a name="line.250"></a>
-<span class="sourceLineNo">251</span><a name="line.251"></a>
-<span class="sourceLineNo">252</span> public void deleteRegions(final
List<RegionInfo> regions) throws IOException {<a name="line.252"></a>
-<span class="sourceLineNo">253</span>
MetaTableAccessor.deleteRegions(master.getConnection(), regions);<a
name="line.253"></a>
-<span class="sourceLineNo">254</span> }<a name="line.254"></a>
-<span class="sourceLineNo">255</span><a name="line.255"></a>
-<span class="sourceLineNo">256</span> //
==========================================================================<a
name="line.256"></a>
-<span class="sourceLineNo">257</span> // Table Descriptors helpers<a
name="line.257"></a>
-<span class="sourceLineNo">258</span> //
==========================================================================<a
name="line.258"></a>
-<span class="sourceLineNo">259</span> private boolean
hasSerialReplicationScope(final TableName tableName) throws IOException {<a
name="line.259"></a>
-<span class="sourceLineNo">260</span> return
hasSerialReplicationScope(getTableDescriptor(tableName));<a name="line.260"></a>
-<span class="sourceLineNo">261</span> }<a name="line.261"></a>
-<span class="sourceLineNo">262</span><a name="line.262"></a>
-<span class="sourceLineNo">263</span> private boolean
hasSerialReplicationScope(final TableDescriptor htd) {<a name="line.263"></a>
-<span class="sourceLineNo">264</span> return (htd != null)?
htd.hasSerialReplicationScope(): false;<a name="line.264"></a>
-<span class="sourceLineNo">265</span> }<a name="line.265"></a>
-<span class="sourceLineNo">266</span><a name="line.266"></a>
-<span class="sourceLineNo">267</span> private int getRegionReplication(final
TableDescriptor htd) {<a name="line.267"></a>
-<span class="sourceLineNo">268</span> return (htd != null) ?
htd.getRegionReplication() : 1;<a name="line.268"></a>
-<span class="sourceLineNo">269</span> }<a name="line.269"></a>
-<span class="sourceLineNo">270</span><a name="line.270"></a>
-<span class="sourceLineNo">271</span> private TableDescriptor
getTableDescriptor(final TableName tableName) throws IOException {<a
name="line.271"></a>
-<span class="sourceLineNo">272</span> return
master.getTableDescriptors().get(tableName);<a name="line.272"></a>
-<span class="sourceLineNo">273</span> }<a name="line.273"></a>
-<span class="sourceLineNo">274</span><a name="line.274"></a>
-<span class="sourceLineNo">275</span> //
==========================================================================<a
name="line.275"></a>
-<span class="sourceLineNo">276</span> // Server Name<a name="line.276"></a>
-<span class="sourceLineNo">277</span> //
==========================================================================<a
name="line.277"></a>
-<span class="sourceLineNo">278</span><a name="line.278"></a>
-<span class="sourceLineNo">279</span> /**<a name="line.279"></a>
-<span class="sourceLineNo">280</span> * Returns the {@link ServerName} from
catalog table {@link Result}<a name="line.280"></a>
-<span class="sourceLineNo">281</span> * where the region is transitioning.
It should be the same as<a name="line.281"></a>
-<span class="sourceLineNo">282</span> * {@link
MetaTableAccessor#getServerName(Result,int)} if the server is at OPEN state.<a
name="line.282"></a>
-<span class="sourceLineNo">283</span> * @param r Result to pull the
transitioning server name from<a name="line.283"></a>
-<span class="sourceLineNo">284</span> * @return A ServerName instance or
{@link MetaTableAccessor#getServerName(Result,int)}<a name="line.284"></a>
-<span class="sourceLineNo">285</span> * if necessary fields not found or
empty.<a name="line.285"></a>
-<span class="sourceLineNo">286</span> */<a name="line.286"></a>
-<span class="sourceLineNo">287</span> static ServerName getRegionServer(final
Result r, int replicaId) {<a name="line.287"></a>
-<span class="sourceLineNo">288</span> final Cell cell =
r.getColumnLatestCell(HConstants.CATALOG_FAMILY,<a name="line.288"></a>
-<span class="sourceLineNo">289</span>
getServerNameColumn(replicaId));<a name="line.289"></a>
-<span class="sourceLineNo">290</span> if (cell == null ||
cell.getValueLength() == 0) {<a name="line.290"></a>
-<span class="sourceLineNo">291</span> RegionLocations locations =
MetaTableAccessor.getRegionLocations(r);<a name="line.291"></a>
-<span class="sourceLineNo">292</span> if (locations != null) {<a
name="line.292"></a>
-<span class="sourceLineNo">293</span> HRegionLocation location =
locations.getRegionLocation(replicaId);<a name="line.293"></a>
-<span class="sourceLineNo">294</span> if (location != null) {<a
name="line.294"></a>
-<span class="sourceLineNo">295</span> return
location.getServerName();<a name="line.295"></a>
-<span class="sourceLineNo">296</span> }<a name="line.296"></a>
-<span class="sourceLineNo">297</span> }<a name="line.297"></a>
-<span class="sourceLineNo">298</span> return null;<a name="line.298"></a>
-<span class="sourceLineNo">299</span> }<a name="line.299"></a>
-<span class="sourceLineNo">300</span> return
ServerName.parseServerName(Bytes.toString(cell.getValueArray(),<a
name="line.300"></a>
-<span class="sourceLineNo">301</span> cell.getValueOffset(),
cell.getValueLength()));<a name="line.301"></a>
-<span class="sourceLineNo">302</span> }<a name="line.302"></a>
-<span class="sourceLineNo">303</span><a name="line.303"></a>
-<span class="sourceLineNo">304</span> private static byte[]
getServerNameColumn(int replicaId) {<a name="line.304"></a>
-<span class="sourceLineNo">305</span> return replicaId == 0<a
name="line.305"></a>
-<span class="sourceLineNo">306</span> ?
HConstants.SERVERNAME_QUALIFIER<a name="line.306"></a>
-<span class="sourceLineNo">307</span> :
Bytes.toBytes(HConstants.SERVERNAME_QUALIFIER_STR + META_REPLICA_ID_DELIMITER<a
name="line.307"></a>
-<span class="sourceLineNo">308</span> +
String.format(RegionInfo.REPLICA_ID_FORMAT, replicaId));<a name="line.308"></a>
-<span class="sourceLineNo">309</span> }<a name="line.309"></a>
-<span class="sourceLineNo">310</span><a name="line.310"></a>
-<span class="sourceLineNo">311</span> //
==========================================================================<a
name="line.311"></a>
-<span class="sourceLineNo">312</span> // Region State<a name="line.312"></a>
-<span class="sourceLineNo">313</span> //
==========================================================================<a
name="line.313"></a>
-<span class="sourceLineNo">314</span><a name="line.314"></a>
-<span class="sourceLineNo">315</span> /**<a name="line.315"></a>
-<span class="sourceLineNo">316</span> * Pull the region state from a catalog
table {@link Result}.<a name="line.316"></a>
-<span class="sourceLineNo">317</span> * @param r Result to pull the region
state from<a name="line.317"></a>
-<span class="sourceLineNo">318</span> * @return the region state, or null if
unknown.<a name="line.318"></a>
-<span class="sourceLineNo">319</span> */<a name="line.319"></a>
-<span class="sourceLineNo">320</span> protected State getRegionState(final
Result r, int replicaId) {<a name="line.320"></a>
-<span class="sourceLineNo">321</span> Cell cell =
r.getColumnLatestCell(HConstants.CATALOG_FAMILY, getStateColumn(replicaId));<a
name="line.321"></a>
-<span class="sourceLineNo">322</span> if (cell == null ||
cell.getValueLength() == 0) {<a name="line.322"></a>
-<span class="sourceLineNo">323</span> return null;<a name="line.323"></a>
-<span class="sourceLineNo">324</span> }<a name="line.324"></a>
-<span class="sourceLineNo">325</span> return
State.valueOf(Bytes.toString(cell.getValueArray(), cell.getValueOffset(),
cell.getValueLength()));<a name="line.325"></a>
-<span class="sourceLineNo">326</span> }<a name="line.326"></a>
-<span class="sourceLineNo">327</span><a name="line.327"></a>
-<span class="sourceLineNo">328</span> private static byte[]
getStateColumn(int replicaId) {<a name="line.328"></a>
-<span class="sourceLineNo">329</span> return replicaId == 0<a
name="line.329"></a>
-<span class="sourceLineNo">330</span> ? HConstants.STATE_QUALIFIER<a
name="line.330"></a>
-<span class="sourceLineNo">331</span> :
Bytes.toBytes(HConstants.STATE_QUALIFIER_STR + META_REPLICA_ID_DELIMITER<a
name="line.331"></a>
-<span class="sourceLineNo">332</span> +
String.format(RegionInfo.REPLICA_ID_FORMAT, replicaId));<a name="line.332"></a>
-<span class="sourceLineNo">333</span> }<a name="line.333"></a>
-<span class="sourceLineNo">334</span>}<a name="line.334"></a>
+<span class="sourceLineNo">051</span>import
org.apache.hadoop.hbase.shaded.com.google.common.annotations.VisibleForTesting;<a
name="line.51"></a>
+<span class="sourceLineNo">052</span>import
org.apache.hadoop.hbase.shaded.com.google.common.base.Preconditions;<a
name="line.52"></a>
+<span class="sourceLineNo">053</span><a name="line.53"></a>
+<span class="sourceLineNo">054</span>/**<a name="line.54"></a>
+<span class="sourceLineNo">055</span> * Store Region State to hbase:meta
table.<a name="line.55"></a>
+<span class="sourceLineNo">056</span> */<a name="line.56"></a>
+<span class="sourceLineNo">057</span>@InterfaceAudience.Private<a
name="line.57"></a>
+<span class="sourceLineNo">058</span>public class RegionStateStore {<a
name="line.58"></a>
+<span class="sourceLineNo">059</span> private static final Log LOG =
LogFactory.getLog(RegionStateStore.class);<a name="line.59"></a>
+<span class="sourceLineNo">060</span><a name="line.60"></a>
+<span class="sourceLineNo">061</span> /** The delimiter for meta columns for
replicaIds &gt; 0 */<a name="line.61"></a>
+<span class="sourceLineNo">062</span> protected static final char
META_REPLICA_ID_DELIMITER = '_';<a name="line.62"></a>
+<span class="sourceLineNo">063</span><a name="line.63"></a>
+<span class="sourceLineNo">064</span> private final MasterServices master;<a
name="line.64"></a>
+<span class="sourceLineNo">065</span><a name="line.65"></a>
+<span class="sourceLineNo">066</span> private MultiHConnection
multiHConnection;<a name="line.66"></a>
+<span class="sourceLineNo">067</span><a name="line.67"></a>
+<span class="sourceLineNo">068</span> public RegionStateStore(final
MasterServices master) {<a name="line.68"></a>
+<span class="sourceLineNo">069</span> this.master = master;<a
name="line.69"></a>
+<span class="sourceLineNo">070</span> }<a name="line.70"></a>
+<span class="sourceLineNo">071</span><a name="line.71"></a>
+<span class="sourceLineNo">072</span> public void start() throws IOException
{<a name="line.72"></a>
+<span class="sourceLineNo">073</span> }<a name="line.73"></a>
+<span class="sourceLineNo">074</span><a name="line.74"></a>
+<span class="sourceLineNo">075</span> public void stop() {<a
name="line.75"></a>
+<span class="sourceLineNo">076</span> if (multiHConnection != null) {<a
name="line.76"></a>
+<span class="sourceLineNo">077</span> multiHConnection.close();<a
name="line.77"></a>
+<span class="sourceLineNo">078</span> multiHConnection = null;<a
name="line.78"></a>
+<span class="sourceLineNo">079</span> }<a name="line.79"></a>
+<span class="sourceLineNo">080</span> }<a name="line.80"></a>
+<span class="sourceLineNo">081</span><a name="line.81"></a>
+<span class="sourceLineNo">082</span> public interface RegionStateVisitor {<a
name="line.82"></a>
+<span class="sourceLineNo">083</span> void visitRegionState(RegionInfo
regionInfo, State state,<a name="line.83"></a>
+<span class="sourceLineNo">084</span> ServerName regionLocation,
ServerName lastHost, long openSeqNum);<a name="line.84"></a>
+<span class="sourceLineNo">085</span> }<a name="line.85"></a>
+<span class="sourceLineNo">086</span><a name="line.86"></a>
+<span class="sourceLineNo">087</span> public void visitMeta(final
RegionStateVisitor visitor) throws IOException {<a name="line.87"></a>
+<span class="sourceLineNo">088</span>
MetaTableAccessor.fullScanRegions(master.getConnection(), new
MetaTableAccessor.Visitor() {<a name="line.88"></a>
+<span class="sourceLineNo">089</span> final boolean isDebugEnabled =
LOG.isDebugEnabled();<a name="line.89"></a>
+<span class="sourceLineNo">090</span><a name="line.90"></a>
+<span class="sourceLineNo">091</span> @Override<a name="line.91"></a>
+<span class="sourceLineNo">092</span> public boolean visit(final Result
r) throws IOException {<a name="line.92"></a>
+<span class="sourceLineNo">093</span> if (r != null &&
!r.isEmpty()) {<a name="line.93"></a>
+<span class="sourceLineNo">094</span> long st = 0;<a
name="line.94"></a>
+<span class="sourceLineNo">095</span> if (LOG.isTraceEnabled()) {<a
name="line.95"></a>
+<span class="sourceLineNo">096</span> st =
System.currentTimeMillis();<a name="line.96"></a>
+<span class="sourceLineNo">097</span> }<a name="line.97"></a>
+<span class="sourceLineNo">098</span> visitMetaEntry(visitor, r);<a
name="line.98"></a>
+<span class="sourceLineNo">099</span> if (LOG.isTraceEnabled()) {<a
name="line.99"></a>
+<span class="sourceLineNo">100</span> long et =
System.currentTimeMillis();<a name="line.100"></a>
+<span class="sourceLineNo">101</span> LOG.trace("[T] LOAD META PERF
" + StringUtils.humanTimeDiff(et - st));<a name="line.101"></a>
+<span class="sourceLineNo">102</span> }<a name="line.102"></a>
+<span class="sourceLineNo">103</span> } else if (isDebugEnabled) {<a
name="line.103"></a>
+<span class="sourceLineNo">104</span> LOG.debug("NULL result from
meta - ignoring but this is strange.");<a name="line.104"></a>
+<span class="sourceLineNo">105</span> }<a name="line.105"></a>
+<span class="sourceLineNo">106</span> return true;<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> }<a name="line.109"></a>
+<span class="sourceLineNo">110</span><a name="line.110"></a>
+<span class="sourceLineNo">111</span> private void visitMetaEntry(final
RegionStateVisitor visitor, final Result result)<a name="line.111"></a>
+<span class="sourceLineNo">112</span> throws IOException {<a
name="line.112"></a>
+<span class="sourceLineNo">113</span> final RegionLocations rl =
MetaTableAccessor.getRegionLocations(result);<a name="line.113"></a>
+<span class="sourceLineNo">114</span> if (rl == null) return;<a
name="line.114"></a>
+<span class="sourceLineNo">115</span><a name="line.115"></a>
+<span class="sourceLineNo">116</span> final HRegionLocation[] locations =
rl.getRegionLocations();<a name="line.116"></a>
+<span class="sourceLineNo">117</span> if (locations == null) return;<a
name="line.117"></a>
+<span class="sourceLineNo">118</span><a name="line.118"></a>
+<span class="sourceLineNo">119</span> for (int i = 0; i <
locations.length; ++i) {<a name="line.119"></a>
+<span class="sourceLineNo">120</span> final HRegionLocation hrl =
locations[i];<a name="line.120"></a>
+<span class="sourceLineNo">121</span> if (hrl == null) continue;<a
name="line.121"></a>
+<span class="sourceLineNo">122</span><a name="line.122"></a>
+<span class="sourceLineNo">123</span> final RegionInfo regionInfo =
hrl.getRegionInfo();<a name="line.123"></a>
+<span class="sourceLineNo">124</span> if (regionInfo == null) continue;<a
name="line.124"></a>
+<span class="sourceLineNo">125</span><a name="line.125"></a>
+<span class="sourceLineNo">126</span> final int replicaId =
regionInfo.getReplicaId();<a name="line.126"></a>
+<span class="sourceLineNo">127</span> final State state =
getRegionState(result, replicaId);<a name="line.127"></a>
+<span class="sourceLineNo">128</span><a name="line.128"></a>
+<span class="sourceLineNo">129</span> final ServerName lastHost =
hrl.getServerName();<a name="line.129"></a>
+<span class="sourceLineNo">130</span> final ServerName regionLocation =
getRegionServer(result, replicaId);<a name="line.130"></a>
+<span class="sourceLineNo">131</span> final long openSeqNum = -1;<a
name="line.131"></a>
+<span class="sourceLineNo">132</span><a name="line.132"></a>
+<span class="sourceLineNo">133</span> // TODO: move under trace, now is
visible for debugging<a name="line.133"></a>
+<span class="sourceLineNo">134</span> LOG.info(String.format("Load
hbase:meta entry region=%s regionState=%s lastHost=%s regionLocation=%s",<a
name="line.134"></a>
+<span class="sourceLineNo">135</span> regionInfo, state, lastHost,
regionLocation));<a name="line.135"></a>
+<span class="sourceLineNo">136</span><a name="line.136"></a>
+<span class="sourceLineNo">137</span>
visitor.visitRegionState(regionInfo, state, regionLocation, lastHost,
openSeqNum);<a name="line.137"></a>
+<span class="sourceLineNo">138</span> }<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> public void updateRegionLocation(final
RegionInfo regionInfo, final State state,<a name="line.141"></a>
+<span class="sourceLineNo">142</span> final ServerName regionLocation,
final ServerName lastHost, final long openSeqNum,<a name="line.142"></a>
+<span class="sourceLineNo">143</span> final long pid)<a
name="line.143"></a>
+<span class="sourceLineNo">144</span> throws IOException {<a
name="line.144"></a>
+<span class="sourceLineNo">145</span> if (regionInfo.isMetaRegion()) {<a
name="line.145"></a>
+<span class="sourceLineNo">146</span> updateMetaLocation(regionInfo,
regionLocation);<a name="line.146"></a>
+<span class="sourceLineNo">147</span> } else {<a name="line.147"></a>
+<span class="sourceLineNo">148</span>
updateUserRegionLocation(regionInfo, state, regionLocation, lastHost,
openSeqNum, pid);<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> public void updateRegionState(final
long openSeqNum, final long pid,<a name="line.152"></a>
+<span class="sourceLineNo">153</span> final RegionState newState, final
RegionState oldState) throws IOException {<a name="line.153"></a>
+<span class="sourceLineNo">154</span>
updateRegionLocation(newState.getRegion(), newState.getState(),
newState.getServerName(),<a name="line.154"></a>
+<span class="sourceLineNo">155</span> oldState != null ?
oldState.getServerName() : null, openSeqNum, pid);<a name="line.155"></a>
+<span class="sourceLineNo">156</span> }<a name="line.156"></a>
+<span class="sourceLineNo">157</span><a name="line.157"></a>
+<span class="sourceLineNo">158</span> protected void updateMetaLocation(final
RegionInfo regionInfo, final ServerName serverName)<a name="line.158"></a>
+<span class="sourceLineNo">159</span> throws IOException {<a
name="line.159"></a>
+<span class="sourceLineNo">160</span> try {<a name="line.160"></a>
+<span class="sourceLineNo">161</span>
MetaTableLocator.setMetaLocation(master.getZooKeeper(), serverName,<a
name="line.161"></a>
+<span class="sourceLineNo">162</span> regionInfo.getReplicaId(),
State.OPEN);<a name="line.162"></a>
+<span class="sourceLineNo">163</span> } catch (KeeperException e) {<a
name="line.163"></a>
+<span class="sourceLineNo">164</span> throw new IOException(e);<a
name="line.164"></a>
+<span class="sourceLineNo">165</span> }<a name="line.165"></a>
+<span class="sourceLineNo">166</span> }<a name="line.166"></a>
+<span class="sourceLineNo">167</span><a name="line.167"></a>
+<span class="sourceLineNo">168</span> protected void
updateUserRegionLocation(final RegionInfo regionInfo, final State state,<a
name="line.168"></a>
+<span class="sourceLineNo">169</span> final ServerName regionLocation,
final ServerName lastHost, final long openSeqNum,<a name="line.169"></a>
+<span class="sourceLineNo">170</span> final long pid)<a
name="line.170"></a>
+<span class="sourceLineNo">171</span> throws IOException {<a
name="line.171"></a>
+<span class="sourceLineNo">172</span> final int replicaId =
regionInfo.getReplicaId();<a name="line.172"></a>
+<span class="sourceLineNo">173</span> final Put put = new
Put(MetaTableAccessor.getMetaKeyForRegion(regionInfo));<a name="line.173"></a>
+<span class="sourceLineNo">174</span> MetaTableAccessor.addRegionInfo(put,
regionInfo);<a name="line.174"></a>
+<span class="sourceLineNo">175</span> final StringBuilder info = new
StringBuilder("pid=" + pid + " updating hbase:meta row=");<a
name="line.175"></a>
+<span class="sourceLineNo">176</span>
info.append(regionInfo.getRegionNameAsString()).append(",
regionState=").append(state);<a name="line.176"></a>
+<span class="sourceLineNo">177</span> if (openSeqNum >= 0) {<a
name="line.177"></a>
+<span class="sourceLineNo">178</span> Preconditions.checkArgument(state
== State.OPEN && regionLocation != null,<a name="line.178"></a>
+<span class="sourceLineNo">179</span> "Open region should be on a
server");<a name="line.179"></a>
+<span class="sourceLineNo">180</span> MetaTableAccessor.addLocation(put,
regionLocation, openSeqNum, -1, replicaId);<a name="line.180"></a>
+<span class="sourceLineNo">181</span> info.append(",
openSeqNum=").append(openSeqNum);<a name="line.181"></a>
+<span class="sourceLineNo">182</span> info.append(",
regionLocation=").append(regionLocation);<a name="line.182"></a>
+<span class="sourceLineNo">183</span> } else if (regionLocation != null
&& !regionLocation.equals(lastHost)) {<a name="line.183"></a>
+<span class="sourceLineNo">184</span> // Ideally, if no regionLocation,
write null to the hbase:meta but this will confuse clients<a
name="line.184"></a>
+<span class="sourceLineNo">185</span> // currently; they want a server to
hit. TODO: Make clients wait if no location.<a name="line.185"></a>
+<span class="sourceLineNo">186</span>
put.addImmutable(HConstants.CATALOG_FAMILY, getServerNameColumn(replicaId),<a
name="line.186"></a>
+<span class="sourceLineNo">187</span>
Bytes.toBytes(regionLocation.getServerName()));<a name="line.187"></a>
+<span class="sourceLineNo">188</span> info.append(",
regionLocation=").append(regionLocation);<a name="line.188"></a>
+<span class="sourceLineNo">189</span> }<a name="line.189"></a>
+<span class="sourceLineNo">190</span>
put.addImmutable(HConstants.CATALOG_FAMILY, getStateColumn(replicaId),<a
name="line.190"></a>
+<span class="sourceLineNo">191</span> Bytes.toBytes(state.name()));<a
name="line.191"></a>
+<span class="sourceLineNo">192</span> LOG.info(info);<a name="line.192"></a>
+<span class="sourceLineNo">193</span><a name="line.193"></a>
+<span class="sourceLineNo">194</span> final boolean serialReplication =
hasSerialReplicationScope(regionInfo.getTable());<a name="line.194"></a>
+<span class="sourceLineNo">195</span> if (serialReplication &&
state == State.OPEN) {<a name="line.195"></a>
+<span class="sourceLineNo">196</span> Put barrierPut =
MetaTableAccessor.makeBarrierPut(regionInfo.getEncodedNameAsBytes(),<a
name="line.196"></a>
+<span class="sourceLineNo">197</span> openSeqNum,
regionInfo.getTable().getName());<a name="line.197"></a>
+<span class="sourceLineNo">198</span> updateRegionLocation(regionInfo,
state, put, barrierPut);<a name="line.198"></a>
+<span class="sourceLineNo">199</span> } else {<a name="line.199"></a>
+<span class="sourceLineNo">200</span> updateRegionLocation(regionInfo,
state, put);<a name="line.200"></a>
+<span class="sourceLineNo">201</span> }<a name="line.201"></a>
+<span class="sourceLineNo">202</span> }<a name="line.202"></a>
+<span class="sourceLineNo">203</span><a name="line.203"></a>
+<span class="sourceLineNo">204</span> protected void
updateRegionLocation(final RegionInfo regionInfo, final State state,<a
name="line.204"></a>
+<span class="sourceLineNo">205</span> final Put... put) throws
IOException {<a name="line.205"></a>
+<span class="sourceLineNo">206</span> synchronized (this) {<a
name="line.206"></a>
+<span class="sourceLineNo">207</span> if (multiHConnection == null) {<a
name="line.207"></a>
+<span class="sourceLineNo">208</span> multiHConnection = new
MultiHConnection(master.getConfiguration(), 1);<a name="line.208"></a>
+<span class="sourceLineNo">209</span> }<a name="line.209"></a>
+<span class="sourceLineNo">210</span> }<a name="line.210"></a>
+<span class="sourceLineNo">211</span><a name="line.211"></a>
+<span class="sourceLineNo">212</span> try {<a name="line.212"></a>
+<span class="sourceLineNo">213</span>
multiHConnection.processBatchCallback(Arrays.asList(put),
TableName.META_TABLE_NAME, null, null);<a name="line.213"></a>
+<span class="sourceLineNo">214</span> } catch (IOException e) {<a
name="line.214"></a>
+<span class="sourceLineNo">215</span> // TODO: Revist!!!! Means that if a
server is loaded, then we will abort our host!<a name="line.215"></a>
+<span class="sourceLineNo">216</span> // In tests we abort the Master!<a
name="line.216"></a>
+<span class="sourceLineNo">217</span> String msg = String.format("FAILED
persisting region=%s state=%s",<a name="line.217"></a>
+<span class="sourceLineNo">218</span> regionInfo.getShortNameToLog(),
state);<a name="line.218"></a>
+<span class="sourceLineNo">219</span> LOG.error(msg, e);<a
name="line.219"></a>
+<span class="sourceLineNo">220</span> master.abort(msg, e);<a
name="line.220"></a>
+<span class="sourceLineNo">221</span> throw e;<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> //
============================================================================================<a
name="line.225"></a>
+<span class="sourceLineNo">226</span> // Update Region Splitting State
helpers<a name="line.226"></a>
+<span class="sourceLineNo">227</span> //
============================================================================================<a
name="line.227"></a>
+<span class="sourceLineNo">228</span> public void splitRegion(final
RegionInfo parent, final RegionInfo hriA,<a name="line.228"></a>
+<span class="sourceLineNo">229</span> final RegionInfo hriB, final
ServerName serverName) throws IOException {<a name="line.229"></a>
+<span class="sourceLineNo">230</span> final TableDescriptor htd =
getTableDescriptor(parent.getTable());<a name="line.230"></a>
+<span class="sourceLineNo">231</span>
MetaTableAccessor.splitRegion(master.getConnection(), parent, hriA, hriB,
serverName,<a name="line.231"></a>
+<span class="sourceLineNo">232</span> getRegionReplication(htd),
hasSerialReplicationScope(htd));<a name="line.232"></a>
+<span class="sourceLineNo">233</span> }<a name="line.233"></a>
+<span class="sourceLineNo">234</span><a name="line.234"></a>
+<span class="sourceLineNo">235</span> //
============================================================================================<a
name="line.235"></a>
+<span class="sourceLineNo">236</span> // Update Region Merging State
helpers<a name="line.236"></a>
+<span class="sourceLineNo">237</span> //
============================================================================================<a
name="line.237"></a>
+<span class="sourceLineNo">238</span> public void mergeRegions(final
RegionInfo parent, final RegionInfo hriA,<a name="line.238"></a>
+<span class="sourceLineNo">239</span> final RegionInfo hriB, final
ServerName serverName) throws IOException {<a name="line.239"></a>
+<span class="sourceLineNo">240</span> final TableDescriptor htd =
getTableDescriptor(parent.getTable());<a name="line.240"></a>
+<span class="sourceLineNo">241</span>
MetaTableAccessor.mergeRegions(master.getConnection(), parent, hriA, hriB,
serverName,<a name="line.241"></a>
+<span class="sourceLineNo">242</span> getRegionReplication(htd),
EnvironmentEdgeManager.currentTime(),<a name="line.242"></a>
+<span class="sourceLineNo">243</span>
hasSerialReplicationScope(htd));<a name="line.243"></a>
+<span class="sourceLineNo">244</span> }<a name="line.244"></a>
+<span class="sourceLineNo">245</span><a name="line.245"></a>
+<span class="sourceLineNo">246</span> //
============================================================================================<a
name="line.246"></a>
+<span class="sourceLineNo">247</span> // Delete Region State helpers<a
name="line.247"></a>
+<span class="sourceLineNo">248</span> //
============================================================================================<a
name="line.248"></a>
+<span class="sourceLineNo">249</span> public void deleteRegion(final
RegionInfo regionInfo) throws IOException {<a name="line.249"></a>
+<span class="sourceLineNo">250</span>
deleteRegions(Collections.singletonList(regionInfo));<a name="line.250"></a>
+<span class="sourceLineNo">251</span> }<a name="line.251"></a>
+<span class="sourceLineNo">252</span><a name="line.252"></a>
+<span class="sourceLineNo">253</span> public void deleteRegions(final
List<RegionInfo> regions) throws IOException {<a name="line.253"></a>
+<span class="sourceLineNo">254</span>
MetaTableAccessor.deleteRegions(master.getConnection(), regions);<a
name="line.254"></a>
+<span class="sourceLineNo">255</span> }<a name="line.255"></a>
+<span class="sourceLineNo">256</span><a name="line.256"></a>
+<span class="sourceLineNo">257</span> //
==========================================================================<a
name="line.257"></a>
+<span class="sourceLineNo">258</span> // Table Descriptors helpers<a
name="line.258"></a>
+<span class="sourceLineNo">259</span> //
==========================================================================<a
name="line.259"></a>
+<span class="sourceLineNo">260</span> private boolean
hasSerialReplicationScope(final TableName tableName) throws IOException {<a
name="line.260"></a>
+<span class="sourceLineNo">261</span> return
hasSerialReplicationScope(getTableDescriptor(tableName));<a name="line.261"></a>
+<span class="sourceLineNo">262</span> }<a name="line.262"></a>
+<span class="sourceLineNo">263</span><a name="line.263"></a>
+<span class="sourceLineNo">264</span> private boolean
hasSerialReplicationScope(final TableDescriptor htd) {<a name="line.264"></a>
+<span class="sourceLineNo">265</span> return (htd != null)?
htd.hasSerialReplicationScope(): false;<a name="line.265"></a>
+<span class="sourceLineNo">266</span> }<a name="line.266"></a>
+<span class="sourceLineNo">267</span><a name="line.267"></a>
+<span class="sourceLineNo">268</span> private int getRegionReplication(final
TableDescriptor htd) {<a name="line.268"></a>
+<span class="sourceLineNo">269</span> return (htd != null) ?
htd.getRegionReplication() : 1;<a name="line.269"></a>
+<span class="sourceLineNo">270</span> }<a name="line.270"></a>
+<span class="sourceLineNo">271</span><a name="line.271"></a>
+<span class="sourceLineNo">272</span> private TableDescriptor
getTableDescriptor(final TableName tableName) throws IOException {<a
name="line.272"></a>
+<span class="sourceLineNo">273</span> return
master.getTableDescriptors().get(tableName);<a name="line.273"></a>
+<span class="sourceLineNo">274</span> }<a name="line.274"></a>
+<span class="sourceLineNo">275</span><a name="line.275"></a>
+<span class="sourceLineNo">276</span> //
==========================================================================<a
name="line.276"></a>
+<span class="sourceLineNo">277</span> // Server Name<a name="line.277"></a>
+<span class="sourceLineNo">278</span> //
==========================================================================<a
name="line.278"></a>
+<span class="sourceLineNo">279</span><a name="line.279"></a>
+<span class="sourceLineNo">280</span> /**<a name="line.280"></a>
+<span class="sourceLineNo">281</span> * Returns the {@link ServerName} from
catalog table {@link Result}<a name="line.281"></a>
+<span class="sourceLineNo">282</span> * where the region is transitioning.
It should be the same as<a name="line.282"></a>
+<span class="sourceLineNo">283</span> * {@link
MetaTableAccessor#getServerName(Result,int)} if the server is at OPEN state.<a
name="line.283"></a>
+<span class="sourceLineNo">284</span> * @param r Result to pull the
transitioning server name from<a name="line.284"></a>
+<span class="sourceLineNo">285</span> * @return A ServerName instance or
{@link MetaTableAccessor#getServerName(Result,int)}<a name="line.285"></a>
+<span class="sourceLineNo">286</span> * if necessary fields not found or
empty.<a name="line.286"></a>
+<span class="sourceLineNo">287</span> */<a name="line.287"></a>
+<span class="sourceLineNo">288</span> static ServerName getRegionServer(final
Result r, int replicaId) {<a name="line.288"></a>
+<span class="sourceLineNo">289</span> final Cell cell =
r.getColumnLatestCell(HConstants.CATALOG_FAMILY,<a name="line.289"></a>
+<span class="sourceLineNo">290</span>
getServerNameColumn(replicaId));<a name="line.290"></a>
+<span class="sourceLineNo">291</span> if (cell == null ||
cell.getValueLength() == 0) {<a name="line.291"></a>
+<span class="sourceLineNo">292</span> RegionLocations locations =
MetaTableAccessor.getRegionLocations(r);<a name="line.292"></a>
+<span class="sourceLineNo">293</span> if (locations != null) {<a
name="line.293"></a>
+<span class="sourceLineNo">294</span> HRegionLocation location =
locations.getRegionLocation(replicaId);<a name="line.294"></a>
+<span class="sourceLineNo">295</span> if (location != null) {<a
name="line.295"></a>
+<span class="sourceLineNo">296</span> return
location.getServerName();<a name="line.296"></a>
+<span class="sourceLineNo">297</span> }<a name="line.297"></a>
+<span class="sourceLineNo">298</span> }<a name="line.298"></a>
+<span class="sourceLineNo">299</span> return null;<a name="line.299"></a>
+<span class="sourceLineNo">300</span> }<a name="line.300"></a>
+<span class="sourceLineNo">301</span> return
ServerName.parseServerName(Bytes.toString(cell.getValueArray(),<a
name="line.301"></a>
+<span class="sourceLineNo">302</span> cell.getValueOffset(),
cell.getValueLength()));<a name="line.302"></a>
+<span class="sourceLineNo">303</span> }<a name="line.303"></a>
+<span class="sourceLineNo">304</span><a name="line.304"></a>
+<span class="sourceLineNo">305</span> private static byte[]
getServerNameColumn(int replicaId) {<a name="line.305"></a>
+<span class="sourceLineNo">306</span> return replicaId == 0<a
name="line.306"></a>
+<span class="sourceLineNo">307</span> ?
HConstants.SERVERNAME_QUALIFIER<a name="line.307"></a>
+<span class="sourceLineNo">308</span> :
Bytes.toBytes(HConstants.SERVERNAME_QUALIFIER_STR + META_REPLICA_ID_DELIMITER<a
name="line.308"></a>
+<span class="sourceLineNo">309</span> +
String.format(RegionInfo.REPLICA_ID_FORMAT, replicaId));<a name="line.309"></a>
+<span class="sourceLineNo">310</span> }<a name="line.310"></a>
+<span class="sourceLineNo">311</span><a name="line.311"></a>
+<span class="sourceLineNo">312</span> //
==========================================================================<a
name="line.312"></a>
+<span class="sourceLineNo">313</span> // Region State<a name="line.313"></a>
+<span class="sourceLineNo">314</span> //
==========================================================================<a
name="line.314"></a>
+<span class="sourceLineNo">315</span><a name="line.315"></a>
+<span class="sourceLineNo">316</span> /**<a name="line.316"></a>
+<span class="sourceLineNo">317</span> * Pull the region state from a catalog
table {@link Result}.<a name="line.317"></a>
+<span class="sourceLineNo">318</span> * @param r Result to pull the region
state from<a name="line.318"></a>
+<span class="sourceLineNo">319</span> * @return the region state, or null if
unknown.<a name="line.319"></a>
+<span class="sourceLineNo">320</span> */<a name="line.320"></a>
+<span class="sourceLineNo">321</span> @VisibleForTesting<a
name="line.321"></a>
+<span class="sourceLineNo">322</span> public static State
getRegionState(final Result r, int replicaId) {<a name="line.322"></a>
+<span class="sourceLineNo">323</span> Cell cell =
r.getColumnLatestCell(HConstants.CATALOG_FAMILY, getStateColumn(replicaId));<a
name="line.323"></a>
+<span class="sourceLineNo">324</span> if (cell == null ||
cell.getValueLength() == 0) {<a name="line.324"></a>
+<span class="sourceLineNo">325</span> return null;<a name="line.325"></a>
+<span class="sourceLineNo">326</span> }<a name="line.326"></a>
+<span class="sourceLineNo">327</span> return
State.valueOf(Bytes.toString(cell.getValueArray(), cell.getValueOffset(),<a
name="line.327"></a>
+<span class="sourceLineNo">328</span> cell.getValueLength()));<a
name="line.328"></a>
+<span class="sourceLineNo">329</span> }<a name="line.329"></a>
+<span class="sourceLineNo">330</span><a name="line.330"></a>
+<span class="sourceLineNo">331</span> private static byte[]
getStateColumn(int replicaId) {<a name="line.331"></a>
+<span class="sourceLineNo">332</span> return replicaId == 0<a
name="line.332"></a>
+<span class="sourceLineNo">333</span> ? HConstants.STATE_QUALIFIER<a
name="line.333"></a>
+<span class="sourceLineNo">334</span> :
Bytes.toBytes(HConstants.STATE_QUALIFIER_STR + META_REPLICA_ID_DELIMITER<a
name="line.334"></a>
+<span class="sourceLineNo">335</span> +
String.format(RegionInfo.REPLICA_ID_FORMAT, replicaId));<a name="line.335"></a>
+<span class="sourceLineNo">336</span> }<a name="line.336"></a>
+<span class="sourceLineNo">337</span>}<a name="line.337"></a>
