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| <pre><span class="sourceLineNo">001</span>/*<a name="line.1"></a> |
| <span class="sourceLineNo">002</span> * Licensed to the Apache Software Foundation (ASF) under one<a name="line.2"></a> |
| <span class="sourceLineNo">003</span> * or more contributor license agreements. See the NOTICE file<a name="line.3"></a> |
| <span class="sourceLineNo">004</span> * distributed with this work for additional information<a name="line.4"></a> |
| <span class="sourceLineNo">005</span> * regarding copyright ownership. The ASF licenses this file<a name="line.5"></a> |
| <span class="sourceLineNo">006</span> * to you under the Apache License, Version 2.0 (the<a name="line.6"></a> |
| <span class="sourceLineNo">007</span> * "License"); you may not use this file except in compliance<a name="line.7"></a> |
| <span class="sourceLineNo">008</span> * with the License. You may obtain a copy of the License at<a name="line.8"></a> |
| <span class="sourceLineNo">009</span> *<a name="line.9"></a> |
| <span class="sourceLineNo">010</span> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.10"></a> |
| <span class="sourceLineNo">011</span> *<a name="line.11"></a> |
| <span class="sourceLineNo">012</span> * Unless required by applicable law or agreed to in writing, software<a name="line.12"></a> |
| <span class="sourceLineNo">013</span> * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.13"></a> |
| <span class="sourceLineNo">014</span> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.14"></a> |
| <span class="sourceLineNo">015</span> * See the License for the specific language governing permissions and<a name="line.15"></a> |
| <span class="sourceLineNo">016</span> * limitations under the License.<a name="line.16"></a> |
| <span class="sourceLineNo">017</span> */<a name="line.17"></a> |
| <span class="sourceLineNo">018</span>package org.apache.hadoop.hbase.client;<a name="line.18"></a> |
| <span class="sourceLineNo">019</span><a name="line.19"></a> |
| <span class="sourceLineNo">020</span>import static org.apache.hadoop.hbase.client.AsyncRegionLocatorHelper.canUpdateOnError;<a name="line.20"></a> |
| <span class="sourceLineNo">021</span>import static org.apache.hadoop.hbase.client.AsyncRegionLocatorHelper.removeRegionLocation;<a name="line.21"></a> |
| <span class="sourceLineNo">022</span>import static org.apache.hadoop.hbase.client.ConnectionUtils.isEmptyStopRow;<a name="line.22"></a> |
| <span class="sourceLineNo">023</span>import static org.apache.hadoop.hbase.util.Bytes.BYTES_COMPARATOR;<a name="line.23"></a> |
| <span class="sourceLineNo">024</span><a name="line.24"></a> |
| <span class="sourceLineNo">025</span>import java.util.Collection;<a name="line.25"></a> |
| <span class="sourceLineNo">026</span>import java.util.Collections;<a name="line.26"></a> |
| <span class="sourceLineNo">027</span>import java.util.Map;<a name="line.27"></a> |
| <span class="sourceLineNo">028</span>import java.util.concurrent.ConcurrentNavigableMap;<a name="line.28"></a> |
| <span class="sourceLineNo">029</span>import java.util.concurrent.ConcurrentSkipListMap;<a name="line.29"></a> |
| <span class="sourceLineNo">030</span>import org.apache.hadoop.hbase.HRegionLocation;<a name="line.30"></a> |
| <span class="sourceLineNo">031</span>import org.apache.hadoop.hbase.RegionLocations;<a name="line.31"></a> |
| <span class="sourceLineNo">032</span>import org.apache.hadoop.hbase.ServerName;<a name="line.32"></a> |
| <span class="sourceLineNo">033</span>import org.apache.hadoop.hbase.TableName;<a name="line.33"></a> |
| <span class="sourceLineNo">034</span>import org.apache.hadoop.hbase.util.Bytes;<a name="line.34"></a> |
| <span class="sourceLineNo">035</span>import org.slf4j.Logger;<a name="line.35"></a> |
| <span class="sourceLineNo">036</span>import org.slf4j.LoggerFactory;<a name="line.36"></a> |
| <span class="sourceLineNo">037</span><a name="line.37"></a> |
| <span class="sourceLineNo">038</span>import org.apache.hbase.thirdparty.com.google.common.base.Objects;<a name="line.38"></a> |
| <span class="sourceLineNo">039</span><a name="line.39"></a> |
| <span class="sourceLineNo">040</span>/**<a name="line.40"></a> |
| <span class="sourceLineNo">041</span> * Cache of RegionLocations for use by {@link AsyncNonMetaRegionLocator}. Wrapper around<a name="line.41"></a> |
| <span class="sourceLineNo">042</span> * ConcurrentSkipListMap ensuring proper access to cached items. Updates are synchronized, but reads<a name="line.42"></a> |
| <span class="sourceLineNo">043</span> * are not.<a name="line.43"></a> |
| <span class="sourceLineNo">044</span> */<a name="line.44"></a> |
| <span class="sourceLineNo">045</span>final class AsyncRegionLocationCache {<a name="line.45"></a> |
| <span class="sourceLineNo">046</span><a name="line.46"></a> |
| <span class="sourceLineNo">047</span> private static final Logger LOG = LoggerFactory.getLogger(AsyncRegionLocationCache.class);<a name="line.47"></a> |
| <span class="sourceLineNo">048</span><a name="line.48"></a> |
| <span class="sourceLineNo">049</span> private final ConcurrentNavigableMap<byte[], RegionLocations> cache =<a name="line.49"></a> |
| <span class="sourceLineNo">050</span> new ConcurrentSkipListMap<>(BYTES_COMPARATOR);<a name="line.50"></a> |
| <span class="sourceLineNo">051</span> private final TableName tableName;<a name="line.51"></a> |
| <span class="sourceLineNo">052</span><a name="line.52"></a> |
| <span class="sourceLineNo">053</span> public AsyncRegionLocationCache(TableName tableName) {<a name="line.53"></a> |
| <span class="sourceLineNo">054</span> this.tableName = tableName;<a name="line.54"></a> |
| <span class="sourceLineNo">055</span> }<a name="line.55"></a> |
| <span class="sourceLineNo">056</span><a name="line.56"></a> |
| <span class="sourceLineNo">057</span> /**<a name="line.57"></a> |
| <span class="sourceLineNo">058</span> * Add the given locations to the cache, merging with existing if necessary. Also cleans out any<a name="line.58"></a> |
| <span class="sourceLineNo">059</span> * previously cached locations which may have been superseded by this one (i.e. in case of merged<a name="line.59"></a> |
| <span class="sourceLineNo">060</span> * regions). See {@link #cleanProblematicOverlappedRegions(RegionLocations)}<a name="line.60"></a> |
| <span class="sourceLineNo">061</span> * @param locs the locations to cache<a name="line.61"></a> |
| <span class="sourceLineNo">062</span> * @return the final location (possibly merged) that was added to the cache<a name="line.62"></a> |
| <span class="sourceLineNo">063</span> */<a name="line.63"></a> |
| <span class="sourceLineNo">064</span> public synchronized RegionLocations add(RegionLocations locs) {<a name="line.64"></a> |
| <span class="sourceLineNo">065</span> byte[] startKey = locs.getRegionLocation().getRegion().getStartKey();<a name="line.65"></a> |
| <span class="sourceLineNo">066</span> RegionLocations oldLocs = cache.putIfAbsent(startKey, locs);<a name="line.66"></a> |
| <span class="sourceLineNo">067</span> if (oldLocs == null) {<a name="line.67"></a> |
| <span class="sourceLineNo">068</span> cleanProblematicOverlappedRegions(locs);<a name="line.68"></a> |
| <span class="sourceLineNo">069</span> return locs;<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> // check whether the regions are the same, this usually happens when table is split/merged,<a name="line.72"></a> |
| <span class="sourceLineNo">073</span> // or deleted and recreated again.<a name="line.73"></a> |
| <span class="sourceLineNo">074</span> RegionInfo region = locs.getRegionLocation().getRegion();<a name="line.74"></a> |
| <span class="sourceLineNo">075</span> RegionInfo oldRegion = oldLocs.getRegionLocation().getRegion();<a name="line.75"></a> |
| <span class="sourceLineNo">076</span> if (region.getEncodedName().equals(oldRegion.getEncodedName())) {<a name="line.76"></a> |
| <span class="sourceLineNo">077</span> RegionLocations mergedLocs = oldLocs.mergeLocations(locs);<a name="line.77"></a> |
| <span class="sourceLineNo">078</span> if (isEqual(mergedLocs, oldLocs)) {<a name="line.78"></a> |
| <span class="sourceLineNo">079</span> // the merged one is the same with the old one, give up<a name="line.79"></a> |
| <span class="sourceLineNo">080</span> LOG.trace("Will not add {} to cache because the old value {} "<a name="line.80"></a> |
| <span class="sourceLineNo">081</span> + " is newer than us or has the same server name."<a name="line.81"></a> |
| <span class="sourceLineNo">082</span> + " Maybe it is updated before we replace it", locs, oldLocs);<a name="line.82"></a> |
| <span class="sourceLineNo">083</span> return oldLocs;<a name="line.83"></a> |
| <span class="sourceLineNo">084</span> }<a name="line.84"></a> |
| <span class="sourceLineNo">085</span> locs = mergedLocs;<a name="line.85"></a> |
| <span class="sourceLineNo">086</span> } else {<a name="line.86"></a> |
| <span class="sourceLineNo">087</span> // the region is different, here we trust the one we fetched. This maybe wrong but finally<a name="line.87"></a> |
| <span class="sourceLineNo">088</span> // the upper layer can detect this and trigger removal of the wrong locations<a name="line.88"></a> |
| <span class="sourceLineNo">089</span> if (LOG.isDebugEnabled()) {<a name="line.89"></a> |
| <span class="sourceLineNo">090</span> LOG.debug("The newly fetch region {} is different from the old one {} for row '{}',"<a name="line.90"></a> |
| <span class="sourceLineNo">091</span> + " try replaying the old one...", region, oldRegion, Bytes.toStringBinary(startKey));<a name="line.91"></a> |
| <span class="sourceLineNo">092</span> }<a name="line.92"></a> |
| <span class="sourceLineNo">093</span> }<a name="line.93"></a> |
| <span class="sourceLineNo">094</span><a name="line.94"></a> |
| <span class="sourceLineNo">095</span> cache.put(startKey, locs);<a name="line.95"></a> |
| <span class="sourceLineNo">096</span> cleanProblematicOverlappedRegions(locs);<a name="line.96"></a> |
| <span class="sourceLineNo">097</span> return locs;<a name="line.97"></a> |
| <span class="sourceLineNo">098</span> }<a name="line.98"></a> |
| <span class="sourceLineNo">099</span><a name="line.99"></a> |
| <span class="sourceLineNo">100</span> /**<a name="line.100"></a> |
| <span class="sourceLineNo">101</span> * When caching a location, the region may have been the result of a merge. Check to see if the<a name="line.101"></a> |
| <span class="sourceLineNo">102</span> * region's boundaries overlap any other cached locations in a problematic way. Those would have<a name="line.102"></a> |
| <span class="sourceLineNo">103</span> * been merge parents which no longer exist. We need to proactively clear them out to avoid a case<a name="line.103"></a> |
| <span class="sourceLineNo">104</span> * where a merged region which receives no requests never gets cleared. This causes requests to<a name="line.104"></a> |
| <span class="sourceLineNo">105</span> * other merged regions after it to see the wrong cached location.<a name="line.105"></a> |
| <span class="sourceLineNo">106</span> * <p><a name="line.106"></a> |
| <span class="sourceLineNo">107</span> * For example, if we have Start_New < Start_Old < End_Old < End_New, then if we only access<a name="line.107"></a> |
| <span class="sourceLineNo">108</span> * within range [End_Old, End_New], then it will always return the old region but it will then<a name="line.108"></a> |
| <span class="sourceLineNo">109</span> * find out the row is not in the range, and try to get the new region, and then we get<a name="line.109"></a> |
| <span class="sourceLineNo">110</span> * [Start_New, End_New), still fall into the same situation.<a name="line.110"></a> |
| <span class="sourceLineNo">111</span> * <p><a name="line.111"></a> |
| <span class="sourceLineNo">112</span> * If Start_Old is less than Start_New, even if we have overlap, it is not a problem, as when the<a name="line.112"></a> |
| <span class="sourceLineNo">113</span> * row is greater than Start_New, we will locate to the new region, and if the row is less than<a name="line.113"></a> |
| <span class="sourceLineNo">114</span> * Start_New, it will fall into the old region's range and we will try to access the region and<a name="line.114"></a> |
| <span class="sourceLineNo">115</span> * get a NotServing exception, and then we will clean the cache.<a name="line.115"></a> |
| <span class="sourceLineNo">116</span> * <p><a name="line.116"></a> |
| <span class="sourceLineNo">117</span> * See HBASE-27650<a name="line.117"></a> |
| <span class="sourceLineNo">118</span> * @param locations the new location that was just cached<a name="line.118"></a> |
| <span class="sourceLineNo">119</span> */<a name="line.119"></a> |
| <span class="sourceLineNo">120</span> private void cleanProblematicOverlappedRegions(RegionLocations locations) {<a name="line.120"></a> |
| <span class="sourceLineNo">121</span> RegionInfo region = locations.getRegionLocation().getRegion();<a name="line.121"></a> |
| <span class="sourceLineNo">122</span><a name="line.122"></a> |
| <span class="sourceLineNo">123</span> boolean isLast = isEmptyStopRow(region.getEndKey());<a name="line.123"></a> |
| <span class="sourceLineNo">124</span><a name="line.124"></a> |
| <span class="sourceLineNo">125</span> while (true) {<a name="line.125"></a> |
| <span class="sourceLineNo">126</span> Map.Entry<byte[], RegionLocations> overlap =<a name="line.126"></a> |
| <span class="sourceLineNo">127</span> isLast ? cache.lastEntry() : cache.lowerEntry(region.getEndKey());<a name="line.127"></a> |
| <span class="sourceLineNo">128</span> if (<a name="line.128"></a> |
| <span class="sourceLineNo">129</span> overlap == null || overlap.getValue() == locations<a name="line.129"></a> |
| <span class="sourceLineNo">130</span> || Bytes.equals(overlap.getKey(), region.getStartKey())<a name="line.130"></a> |
| <span class="sourceLineNo">131</span> ) {<a name="line.131"></a> |
| <span class="sourceLineNo">132</span> break;<a name="line.132"></a> |
| <span class="sourceLineNo">133</span> }<a name="line.133"></a> |
| <span class="sourceLineNo">134</span><a name="line.134"></a> |
| <span class="sourceLineNo">135</span> if (LOG.isDebugEnabled()) {<a name="line.135"></a> |
| <span class="sourceLineNo">136</span> LOG.debug(<a name="line.136"></a> |
| <span class="sourceLineNo">137</span> "Removing cached location {} (endKey={}) because it overlaps with "<a name="line.137"></a> |
| <span class="sourceLineNo">138</span> + "new location {} (endKey={})",<a name="line.138"></a> |
| <span class="sourceLineNo">139</span> overlap.getValue(),<a name="line.139"></a> |
| <span class="sourceLineNo">140</span> Bytes.toStringBinary(overlap.getValue().getRegionLocation().getRegion().getEndKey()),<a name="line.140"></a> |
| <span class="sourceLineNo">141</span> locations, Bytes.toStringBinary(locations.getRegionLocation().getRegion().getEndKey()));<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> cache.remove(overlap.getKey());<a name="line.144"></a> |
| <span class="sourceLineNo">145</span> }<a name="line.145"></a> |
| <span class="sourceLineNo">146</span> }<a name="line.146"></a> |
| <span class="sourceLineNo">147</span><a name="line.147"></a> |
| <span class="sourceLineNo">148</span> private boolean isEqual(RegionLocations locs1, RegionLocations locs2) {<a name="line.148"></a> |
| <span class="sourceLineNo">149</span> HRegionLocation[] locArr1 = locs1.getRegionLocations();<a name="line.149"></a> |
| <span class="sourceLineNo">150</span> HRegionLocation[] locArr2 = locs2.getRegionLocations();<a name="line.150"></a> |
| <span class="sourceLineNo">151</span> if (locArr1.length != locArr2.length) {<a name="line.151"></a> |
| <span class="sourceLineNo">152</span> return false;<a name="line.152"></a> |
| <span class="sourceLineNo">153</span> }<a name="line.153"></a> |
| <span class="sourceLineNo">154</span> for (int i = 0; i < locArr1.length; i++) {<a name="line.154"></a> |
| <span class="sourceLineNo">155</span> // do not need to compare region info<a name="line.155"></a> |
| <span class="sourceLineNo">156</span> HRegionLocation loc1 = locArr1[i];<a name="line.156"></a> |
| <span class="sourceLineNo">157</span> HRegionLocation loc2 = locArr2[i];<a name="line.157"></a> |
| <span class="sourceLineNo">158</span> if (loc1 == null) {<a name="line.158"></a> |
| <span class="sourceLineNo">159</span> if (loc2 != null) {<a name="line.159"></a> |
| <span class="sourceLineNo">160</span> return false;<a name="line.160"></a> |
| <span class="sourceLineNo">161</span> }<a name="line.161"></a> |
| <span class="sourceLineNo">162</span> } else {<a name="line.162"></a> |
| <span class="sourceLineNo">163</span> if (loc2 == null) {<a name="line.163"></a> |
| <span class="sourceLineNo">164</span> return false;<a name="line.164"></a> |
| <span class="sourceLineNo">165</span> }<a name="line.165"></a> |
| <span class="sourceLineNo">166</span> if (loc1.getSeqNum() != loc2.getSeqNum()) {<a name="line.166"></a> |
| <span class="sourceLineNo">167</span> return false;<a name="line.167"></a> |
| <span class="sourceLineNo">168</span> }<a name="line.168"></a> |
| <span class="sourceLineNo">169</span> if (!Objects.equal(loc1.getServerName(), loc2.getServerName())) {<a name="line.169"></a> |
| <span class="sourceLineNo">170</span> return false;<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> return true;<a name="line.174"></a> |
| <span class="sourceLineNo">175</span> }<a name="line.175"></a> |
| <span class="sourceLineNo">176</span><a name="line.176"></a> |
| <span class="sourceLineNo">177</span> /**<a name="line.177"></a> |
| <span class="sourceLineNo">178</span> * Returns all cached RegionLocations<a name="line.178"></a> |
| <span class="sourceLineNo">179</span> */<a name="line.179"></a> |
| <span class="sourceLineNo">180</span> public Collection<RegionLocations> getAll() {<a name="line.180"></a> |
| <span class="sourceLineNo">181</span> return Collections.unmodifiableCollection(cache.values());<a name="line.181"></a> |
| <span class="sourceLineNo">182</span> }<a name="line.182"></a> |
| <span class="sourceLineNo">183</span><a name="line.183"></a> |
| <span class="sourceLineNo">184</span> /**<a name="line.184"></a> |
| <span class="sourceLineNo">185</span> * Gets the RegionLocations for a given region's startKey. This is a direct lookup, if the key<a name="line.185"></a> |
| <span class="sourceLineNo">186</span> * does not exist in the cache it will return null.<a name="line.186"></a> |
| <span class="sourceLineNo">187</span> * @param startKey region start key to directly look up<a name="line.187"></a> |
| <span class="sourceLineNo">188</span> */<a name="line.188"></a> |
| <span class="sourceLineNo">189</span> public RegionLocations get(byte[] startKey) {<a name="line.189"></a> |
| <span class="sourceLineNo">190</span> return cache.get(startKey);<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> |
| <span class="sourceLineNo">193</span> /**<a name="line.193"></a> |
| <span class="sourceLineNo">194</span> * Finds the RegionLocations for the region with the greatest startKey less than or equal to the<a name="line.194"></a> |
| <span class="sourceLineNo">195</span> * given row<a name="line.195"></a> |
| <span class="sourceLineNo">196</span> * @param row row to find locations<a name="line.196"></a> |
| <span class="sourceLineNo">197</span> */<a name="line.197"></a> |
| <span class="sourceLineNo">198</span> public RegionLocations findForRow(byte[] row, int replicaId) {<a name="line.198"></a> |
| <span class="sourceLineNo">199</span> Map.Entry<byte[], RegionLocations> entry = cache.floorEntry(row);<a name="line.199"></a> |
| <span class="sourceLineNo">200</span> if (entry == null) {<a name="line.200"></a> |
| <span class="sourceLineNo">201</span> return null;<a name="line.201"></a> |
| <span class="sourceLineNo">202</span> }<a name="line.202"></a> |
| <span class="sourceLineNo">203</span> RegionLocations locs = entry.getValue();<a name="line.203"></a> |
| <span class="sourceLineNo">204</span> if (locs == null) {<a name="line.204"></a> |
| <span class="sourceLineNo">205</span> return null;<a name="line.205"></a> |
| <span class="sourceLineNo">206</span> }<a name="line.206"></a> |
| <span class="sourceLineNo">207</span> HRegionLocation loc = locs.getRegionLocation(replicaId);<a name="line.207"></a> |
| <span class="sourceLineNo">208</span> if (loc == null) {<a name="line.208"></a> |
| <span class="sourceLineNo">209</span> return null;<a name="line.209"></a> |
| <span class="sourceLineNo">210</span> }<a name="line.210"></a> |
| <span class="sourceLineNo">211</span> byte[] endKey = loc.getRegion().getEndKey();<a name="line.211"></a> |
| <span class="sourceLineNo">212</span> if (isEmptyStopRow(endKey) || Bytes.compareTo(row, endKey) < 0) {<a name="line.212"></a> |
| <span class="sourceLineNo">213</span> if (LOG.isTraceEnabled()) {<a name="line.213"></a> |
| <span class="sourceLineNo">214</span> LOG.trace("Found {} in cache for {}, row='{}', locateType={}, replicaId={}", loc, tableName,<a name="line.214"></a> |
| <span class="sourceLineNo">215</span> Bytes.toStringBinary(row), RegionLocateType.CURRENT, replicaId);<a name="line.215"></a> |
| <span class="sourceLineNo">216</span> }<a name="line.216"></a> |
| <span class="sourceLineNo">217</span> return locs;<a name="line.217"></a> |
| <span class="sourceLineNo">218</span> } else {<a name="line.218"></a> |
| <span class="sourceLineNo">219</span> if (LOG.isTraceEnabled()) {<a name="line.219"></a> |
| <span class="sourceLineNo">220</span> LOG.trace("Requested row {} comes after region end key of {} for cached location {}",<a name="line.220"></a> |
| <span class="sourceLineNo">221</span> Bytes.toStringBinary(row), Bytes.toStringBinary(endKey), locs);<a name="line.221"></a> |
| <span class="sourceLineNo">222</span> }<a name="line.222"></a> |
| <span class="sourceLineNo">223</span> return null;<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><a name="line.226"></a> |
| <span class="sourceLineNo">227</span> /**<a name="line.227"></a> |
| <span class="sourceLineNo">228</span> * Finds the RegionLocations for the region with the greatest startKey strictly less than the<a name="line.228"></a> |
| <span class="sourceLineNo">229</span> * given row<a name="line.229"></a> |
| <span class="sourceLineNo">230</span> * @param row row to find locations<a name="line.230"></a> |
| <span class="sourceLineNo">231</span> */<a name="line.231"></a> |
| <span class="sourceLineNo">232</span> public RegionLocations findForBeforeRow(byte[] row, int replicaId) {<a name="line.232"></a> |
| <span class="sourceLineNo">233</span> boolean isEmptyStopRow = isEmptyStopRow(row);<a name="line.233"></a> |
| <span class="sourceLineNo">234</span> Map.Entry<byte[], RegionLocations> entry =<a name="line.234"></a> |
| <span class="sourceLineNo">235</span> isEmptyStopRow ? cache.lastEntry() : cache.lowerEntry(row);<a name="line.235"></a> |
| <span class="sourceLineNo">236</span> if (entry == null) {<a name="line.236"></a> |
| <span class="sourceLineNo">237</span> return null;<a name="line.237"></a> |
| <span class="sourceLineNo">238</span> }<a name="line.238"></a> |
| <span class="sourceLineNo">239</span> RegionLocations locs = entry.getValue();<a name="line.239"></a> |
| <span class="sourceLineNo">240</span> if (locs == null) {<a name="line.240"></a> |
| <span class="sourceLineNo">241</span> return null;<a name="line.241"></a> |
| <span class="sourceLineNo">242</span> }<a name="line.242"></a> |
| <span class="sourceLineNo">243</span> HRegionLocation loc = locs.getRegionLocation(replicaId);<a name="line.243"></a> |
| <span class="sourceLineNo">244</span> if (loc == null) {<a name="line.244"></a> |
| <span class="sourceLineNo">245</span> return null;<a name="line.245"></a> |
| <span class="sourceLineNo">246</span> }<a name="line.246"></a> |
| <span class="sourceLineNo">247</span> if (<a name="line.247"></a> |
| <span class="sourceLineNo">248</span> isEmptyStopRow(loc.getRegion().getEndKey())<a name="line.248"></a> |
| <span class="sourceLineNo">249</span> || (!isEmptyStopRow && Bytes.compareTo(loc.getRegion().getEndKey(), row) >= 0)<a name="line.249"></a> |
| <span class="sourceLineNo">250</span> ) {<a name="line.250"></a> |
| <span class="sourceLineNo">251</span> if (LOG.isTraceEnabled()) {<a name="line.251"></a> |
| <span class="sourceLineNo">252</span> LOG.trace("Found {} in cache for {}, row='{}', locateType={}, replicaId={}", loc, tableName,<a name="line.252"></a> |
| <span class="sourceLineNo">253</span> Bytes.toStringBinary(row), RegionLocateType.BEFORE, replicaId);<a name="line.253"></a> |
| <span class="sourceLineNo">254</span> }<a name="line.254"></a> |
| <span class="sourceLineNo">255</span> return locs;<a name="line.255"></a> |
| <span class="sourceLineNo">256</span> } else {<a name="line.256"></a> |
| <span class="sourceLineNo">257</span> return null;<a name="line.257"></a> |
| <span class="sourceLineNo">258</span> }<a name="line.258"></a> |
| <span class="sourceLineNo">259</span> }<a name="line.259"></a> |
| <span class="sourceLineNo">260</span><a name="line.260"></a> |
| <span class="sourceLineNo">261</span> /**<a name="line.261"></a> |
| <span class="sourceLineNo">262</span> * Removes the location from the cache if it exists and can be removed.<a name="line.262"></a> |
| <span class="sourceLineNo">263</span> * @return true if entry was removed<a name="line.263"></a> |
| <span class="sourceLineNo">264</span> */<a name="line.264"></a> |
| <span class="sourceLineNo">265</span> public synchronized boolean remove(HRegionLocation loc) {<a name="line.265"></a> |
| <span class="sourceLineNo">266</span> byte[] startKey = loc.getRegion().getStartKey();<a name="line.266"></a> |
| <span class="sourceLineNo">267</span> RegionLocations oldLocs = cache.get(startKey);<a name="line.267"></a> |
| <span class="sourceLineNo">268</span> if (oldLocs == null) {<a name="line.268"></a> |
| <span class="sourceLineNo">269</span> return false;<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> HRegionLocation oldLoc = oldLocs.getRegionLocation(loc.getRegion().getReplicaId());<a name="line.272"></a> |
| <span class="sourceLineNo">273</span> if (!canUpdateOnError(loc, oldLoc)) {<a name="line.273"></a> |
| <span class="sourceLineNo">274</span> return false;<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> RegionLocations newLocs = removeRegionLocation(oldLocs, loc.getRegion().getReplicaId());<a name="line.277"></a> |
| <span class="sourceLineNo">278</span> if (newLocs == null) {<a name="line.278"></a> |
| <span class="sourceLineNo">279</span> if (cache.remove(startKey, oldLocs)) {<a name="line.279"></a> |
| <span class="sourceLineNo">280</span> return true;<a name="line.280"></a> |
| <span class="sourceLineNo">281</span> }<a name="line.281"></a> |
| <span class="sourceLineNo">282</span> } else {<a name="line.282"></a> |
| <span class="sourceLineNo">283</span> cache.put(startKey, newLocs);<a name="line.283"></a> |
| <span class="sourceLineNo">284</span> return true;<a name="line.284"></a> |
| <span class="sourceLineNo">285</span> }<a name="line.285"></a> |
| <span class="sourceLineNo">286</span> return false;<a name="line.286"></a> |
| <span class="sourceLineNo">287</span> }<a name="line.287"></a> |
| <span class="sourceLineNo">288</span><a name="line.288"></a> |
| <span class="sourceLineNo">289</span> /**<a name="line.289"></a> |
| <span class="sourceLineNo">290</span> * Returns the size of the region locations cache<a name="line.290"></a> |
| <span class="sourceLineNo">291</span> */<a name="line.291"></a> |
| <span class="sourceLineNo">292</span> public int size() {<a name="line.292"></a> |
| <span class="sourceLineNo">293</span> return cache.size();<a name="line.293"></a> |
| <span class="sourceLineNo">294</span> }<a name="line.294"></a> |
| <span class="sourceLineNo">295</span><a name="line.295"></a> |
| <span class="sourceLineNo">296</span> /**<a name="line.296"></a> |
| <span class="sourceLineNo">297</span> * Removes serverName from all locations in the cache, fully removing any RegionLocations which<a name="line.297"></a> |
| <span class="sourceLineNo">298</span> * are empty after removing the server from it.<a name="line.298"></a> |
| <span class="sourceLineNo">299</span> * @param serverName server to remove from locations<a name="line.299"></a> |
| <span class="sourceLineNo">300</span> */<a name="line.300"></a> |
| <span class="sourceLineNo">301</span> public synchronized void removeForServer(ServerName serverName) {<a name="line.301"></a> |
| <span class="sourceLineNo">302</span> for (Map.Entry<byte[], RegionLocations> entry : cache.entrySet()) {<a name="line.302"></a> |
| <span class="sourceLineNo">303</span> byte[] regionName = entry.getKey();<a name="line.303"></a> |
| <span class="sourceLineNo">304</span> RegionLocations locs = entry.getValue();<a name="line.304"></a> |
| <span class="sourceLineNo">305</span> RegionLocations newLocs = locs.removeByServer(serverName);<a name="line.305"></a> |
| <span class="sourceLineNo">306</span> if (locs == newLocs) {<a name="line.306"></a> |
| <span class="sourceLineNo">307</span> continue;<a name="line.307"></a> |
| <span class="sourceLineNo">308</span> }<a name="line.308"></a> |
| <span class="sourceLineNo">309</span> if (newLocs.isEmpty()) {<a name="line.309"></a> |
| <span class="sourceLineNo">310</span> cache.remove(regionName, locs);<a name="line.310"></a> |
| <span class="sourceLineNo">311</span> } else {<a name="line.311"></a> |
| <span class="sourceLineNo">312</span> cache.put(regionName, newLocs);<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>}<a name="line.316"></a> |
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| </pre> |
| </div> |
| </body> |
| </html> |
