http://git-wip-us.apache.org/repos/asf/hbase-site/blob/1ada5f22/devapidocs/src-html/org/apache/hadoop/hbase/client/AsyncNonMetaRegionLocator.TableCache.html
----------------------------------------------------------------------
diff --git
a/devapidocs/src-html/org/apache/hadoop/hbase/client/AsyncNonMetaRegionLocator.TableCache.html
b/devapidocs/src-html/org/apache/hadoop/hbase/client/AsyncNonMetaRegionLocator.TableCache.html
index 13bde46..9aa8673 100644
---
a/devapidocs/src-html/org/apache/hadoop/hbase/client/AsyncNonMetaRegionLocator.TableCache.html
+++
b/devapidocs/src-html/org/apache/hadoop/hbase/client/AsyncNonMetaRegionLocator.TableCache.html
@@ -37,18 +37,18 @@
<span class="sourceLineNo">029</span><a name="line.29"></a>
<span class="sourceLineNo">030</span>import java.io.IOException;<a
name="line.30"></a>
<span class="sourceLineNo">031</span>import java.util.Arrays;<a
name="line.31"></a>
-<span class="sourceLineNo">032</span>import java.util.HashMap;<a
name="line.32"></a>
-<span class="sourceLineNo">033</span>import java.util.HashSet;<a
name="line.33"></a>
-<span class="sourceLineNo">034</span>import java.util.Iterator;<a
name="line.34"></a>
+<span class="sourceLineNo">032</span>import java.util.HashSet;<a
name="line.32"></a>
+<span class="sourceLineNo">033</span>import java.util.Iterator;<a
name="line.33"></a>
+<span class="sourceLineNo">034</span>import java.util.LinkedHashMap;<a
name="line.34"></a>
<span class="sourceLineNo">035</span>import java.util.List;<a
name="line.35"></a>
<span class="sourceLineNo">036</span>import java.util.Map;<a
name="line.36"></a>
-<span class="sourceLineNo">037</span>import java.util.Set;<a
name="line.37"></a>
-<span class="sourceLineNo">038</span>import
java.util.concurrent.CompletableFuture;<a name="line.38"></a>
-<span class="sourceLineNo">039</span>import
java.util.concurrent.ConcurrentHashMap;<a name="line.39"></a>
-<span class="sourceLineNo">040</span>import
java.util.concurrent.ConcurrentMap;<a name="line.40"></a>
-<span class="sourceLineNo">041</span>import
java.util.concurrent.ConcurrentNavigableMap;<a name="line.41"></a>
-<span class="sourceLineNo">042</span>import
java.util.concurrent.ConcurrentSkipListMap;<a name="line.42"></a>
-<span class="sourceLineNo">043</span>import
java.util.concurrent.ThreadLocalRandom;<a name="line.43"></a>
+<span class="sourceLineNo">037</span>import java.util.Optional;<a
name="line.37"></a>
+<span class="sourceLineNo">038</span>import java.util.Set;<a
name="line.38"></a>
+<span class="sourceLineNo">039</span>import
java.util.concurrent.CompletableFuture;<a name="line.39"></a>
+<span class="sourceLineNo">040</span>import
java.util.concurrent.ConcurrentHashMap;<a name="line.40"></a>
+<span class="sourceLineNo">041</span>import
java.util.concurrent.ConcurrentMap;<a name="line.41"></a>
+<span class="sourceLineNo">042</span>import
java.util.concurrent.ConcurrentNavigableMap;<a name="line.42"></a>
+<span class="sourceLineNo">043</span>import
java.util.concurrent.ConcurrentSkipListMap;<a name="line.43"></a>
<span class="sourceLineNo">044</span><a name="line.44"></a>
<span class="sourceLineNo">045</span>import org.apache.commons.logging.Log;<a
name="line.45"></a>
<span class="sourceLineNo">046</span>import
org.apache.commons.logging.LogFactory;<a name="line.46"></a>
@@ -115,7 +115,7 @@
<span class="sourceLineNo">107</span> public final Set<LocateRequest>
pendingRequests = new HashSet<>();<a name="line.107"></a>
<span class="sourceLineNo">108</span><a name="line.108"></a>
<span class="sourceLineNo">109</span> public final Map<LocateRequest,
CompletableFuture<HRegionLocation>> allRequests =<a
name="line.109"></a>
-<span class="sourceLineNo">110</span> new HashMap<>();<a
name="line.110"></a>
+<span class="sourceLineNo">110</span> new LinkedHashMap<>();<a
name="line.110"></a>
<span class="sourceLineNo">111</span><a name="line.111"></a>
<span class="sourceLineNo">112</span> public boolean hasQuota(int max) {<a
name="line.112"></a>
<span class="sourceLineNo">113</span> return pendingRequests.size() <
max;<a name="line.113"></a>
@@ -128,353 +128,358 @@
<span class="sourceLineNo">120</span> public void send(LocateRequest req)
{<a name="line.120"></a>
<span class="sourceLineNo">121</span> pendingRequests.add(req);<a
name="line.121"></a>
<span class="sourceLineNo">122</span> }<a name="line.122"></a>
-<span class="sourceLineNo">123</span> }<a name="line.123"></a>
-<span class="sourceLineNo">124</span><a name="line.124"></a>
-<span class="sourceLineNo">125</span>
AsyncNonMetaRegionLocator(AsyncConnectionImpl conn) {<a name="line.125"></a>
-<span class="sourceLineNo">126</span> this.conn = conn;<a
name="line.126"></a>
-<span class="sourceLineNo">127</span>
this.maxConcurrentLocateRequestPerTable = conn.getConfiguration().getInt(<a
name="line.127"></a>
-<span class="sourceLineNo">128</span>
MAX_CONCURRENT_LOCATE_REQUEST_PER_TABLE,
DEFAULT_MAX_CONCURRENT_LOCATE_REQUEST_PER_TABLE);<a name="line.128"></a>
-<span class="sourceLineNo">129</span> }<a name="line.129"></a>
-<span class="sourceLineNo">130</span><a name="line.130"></a>
-<span class="sourceLineNo">131</span> private TableCache
getTableCache(TableName tableName) {<a name="line.131"></a>
-<span class="sourceLineNo">132</span> return computeIfAbsent(cache,
tableName, TableCache::new);<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> private void
removeFromCache(HRegionLocation loc) {<a name="line.135"></a>
-<span class="sourceLineNo">136</span> TableCache tableCache =
cache.get(loc.getRegionInfo().getTable());<a name="line.136"></a>
-<span class="sourceLineNo">137</span> if (tableCache == null) {<a
name="line.137"></a>
-<span class="sourceLineNo">138</span> return;<a name="line.138"></a>
-<span class="sourceLineNo">139</span> }<a name="line.139"></a>
-<span class="sourceLineNo">140</span>
tableCache.cache.computeIfPresent(loc.getRegionInfo().getStartKey(), (k,
oldLoc) -> {<a name="line.140"></a>
-<span class="sourceLineNo">141</span> if (oldLoc.getSeqNum() >
loc.getSeqNum() ||<a name="line.141"></a>
-<span class="sourceLineNo">142</span>
!oldLoc.getServerName().equals(loc.getServerName())) {<a name="line.142"></a>
-<span class="sourceLineNo">143</span> return oldLoc;<a
name="line.143"></a>
-<span class="sourceLineNo">144</span> }<a name="line.144"></a>
-<span class="sourceLineNo">145</span> return null;<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><a name="line.148"></a>
-<span class="sourceLineNo">149</span> // return whether we add this loc to
cache<a name="line.149"></a>
-<span class="sourceLineNo">150</span> private boolean addToCache(TableCache
tableCache, HRegionLocation loc) {<a name="line.150"></a>
-<span class="sourceLineNo">151</span> if (LOG.isTraceEnabled()) {<a
name="line.151"></a>
-<span class="sourceLineNo">152</span> LOG.trace("Try adding " + loc + "
to cache");<a name="line.152"></a>
-<span class="sourceLineNo">153</span> }<a name="line.153"></a>
-<span class="sourceLineNo">154</span> byte[] startKey =
loc.getRegionInfo().getStartKey();<a name="line.154"></a>
-<span class="sourceLineNo">155</span> HRegionLocation oldLoc =
tableCache.cache.putIfAbsent(startKey, loc);<a name="line.155"></a>
-<span class="sourceLineNo">156</span> if (oldLoc == null) {<a
name="line.156"></a>
-<span class="sourceLineNo">157</span> return true;<a name="line.157"></a>
-<span class="sourceLineNo">158</span> }<a name="line.158"></a>
-<span class="sourceLineNo">159</span> if (oldLoc.getSeqNum() >
loc.getSeqNum() ||<a name="line.159"></a>
-<span class="sourceLineNo">160</span>
oldLoc.getServerName().equals(loc.getServerName())) {<a name="line.160"></a>
-<span class="sourceLineNo">161</span> if (LOG.isTraceEnabled()) {<a
name="line.161"></a>
-<span class="sourceLineNo">162</span> LOG.trace("Will not add " + loc +
" to cache because the old value " + oldLoc +<a name="line.162"></a>
-<span class="sourceLineNo">163</span> " is newer than us or has the
same server name");<a name="line.163"></a>
+<span class="sourceLineNo">123</span><a name="line.123"></a>
+<span class="sourceLineNo">124</span> public Optional<LocateRequest>
getCandidate() {<a name="line.124"></a>
+<span class="sourceLineNo">125</span> return
allRequests.keySet().stream().filter(r -> !isPending(r)).findFirst();<a
name="line.125"></a>
+<span class="sourceLineNo">126</span> }<a name="line.126"></a>
+<span class="sourceLineNo">127</span><a name="line.127"></a>
+<span class="sourceLineNo">128</span> public void
clearCompletedRequests(Optional<HRegionLocation> location) {<a
name="line.128"></a>
+<span class="sourceLineNo">129</span> for
(Iterator<Map.Entry<LocateRequest,
CompletableFuture<HRegionLocation>>> iter = allRequests<a
name="line.129"></a>
+<span class="sourceLineNo">130</span> .entrySet().iterator();
iter.hasNext();) {<a name="line.130"></a>
+<span class="sourceLineNo">131</span> Map.Entry<LocateRequest,
CompletableFuture<HRegionLocation>> entry = iter.next();<a
name="line.131"></a>
+<span class="sourceLineNo">132</span> if (tryComplete(entry.getKey(),
entry.getValue(), location)) {<a name="line.132"></a>
+<span class="sourceLineNo">133</span> iter.remove();<a
name="line.133"></a>
+<span class="sourceLineNo">134</span> }<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> private boolean
tryComplete(LocateRequest req, CompletableFuture<HRegionLocation>
future,<a name="line.138"></a>
+<span class="sourceLineNo">139</span> Optional<HRegionLocation>
location) {<a name="line.139"></a>
+<span class="sourceLineNo">140</span> if (future.isDone()) {<a
name="line.140"></a>
+<span class="sourceLineNo">141</span> return true;<a
name="line.141"></a>
+<span class="sourceLineNo">142</span> }<a name="line.142"></a>
+<span class="sourceLineNo">143</span> if (!location.isPresent()) {<a
name="line.143"></a>
+<span class="sourceLineNo">144</span> return false;<a
name="line.144"></a>
+<span class="sourceLineNo">145</span> }<a name="line.145"></a>
+<span class="sourceLineNo">146</span> HRegionLocation loc =
location.get();<a name="line.146"></a>
+<span class="sourceLineNo">147</span> boolean completed;<a
name="line.147"></a>
+<span class="sourceLineNo">148</span> if
(req.locateType.equals(RegionLocateType.BEFORE)) {<a name="line.148"></a>
+<span class="sourceLineNo">149</span> // for locating the row before
current row, the common case is to find the previous region in<a
name="line.149"></a>
+<span class="sourceLineNo">150</span> // reverse scan, so we check the
endKey first. In general, the condition should be startKey <<a
name="line.150"></a>
+<span class="sourceLineNo">151</span> // req.row and endKey >=
req.row. Here we split it to endKey == req.row || (endKey > req.row<a
name="line.151"></a>
+<span class="sourceLineNo">152</span> // && startKey <
req.row). The two conditions are equal since startKey < endKey.<a
name="line.152"></a>
+<span class="sourceLineNo">153</span> int c =
Bytes.compareTo(loc.getRegionInfo().getEndKey(), req.row);<a
name="line.153"></a>
+<span class="sourceLineNo">154</span> completed =<a name="line.154"></a>
+<span class="sourceLineNo">155</span> c == 0 || (c > 0
&& Bytes.compareTo(loc.getRegionInfo().getStartKey(), req.row) <
0);<a name="line.155"></a>
+<span class="sourceLineNo">156</span> } else {<a name="line.156"></a>
+<span class="sourceLineNo">157</span> completed =
loc.getRegionInfo().containsRow(req.row);<a name="line.157"></a>
+<span class="sourceLineNo">158</span> }<a name="line.158"></a>
+<span class="sourceLineNo">159</span> if (completed) {<a
name="line.159"></a>
+<span class="sourceLineNo">160</span> future.complete(loc);<a
name="line.160"></a>
+<span class="sourceLineNo">161</span> return true;<a
name="line.161"></a>
+<span class="sourceLineNo">162</span> } else {<a name="line.162"></a>
+<span class="sourceLineNo">163</span> return false;<a
name="line.163"></a>
<span class="sourceLineNo">164</span> }<a name="line.164"></a>
-<span class="sourceLineNo">165</span> return false;<a name="line.165"></a>
-<span class="sourceLineNo">166</span> }<a name="line.166"></a>
-<span class="sourceLineNo">167</span> return loc ==
tableCache.cache.compute(startKey, (k, oldValue) -> {<a name="line.167"></a>
-<span class="sourceLineNo">168</span> if (oldValue == null ||
oldValue.getSeqNum() <= loc.getSeqNum()) {<a name="line.168"></a>
-<span class="sourceLineNo">169</span> return loc;<a name="line.169"></a>
-<span class="sourceLineNo">170</span> }<a name="line.170"></a>
-<span class="sourceLineNo">171</span> if (LOG.isTraceEnabled()) {<a
name="line.171"></a>
-<span class="sourceLineNo">172</span> LOG.trace("Will not add " + loc +
" to cache because the old value " + oldValue +<a name="line.172"></a>
-<span class="sourceLineNo">173</span> " is newer than us or has the
same server name." +<a name="line.173"></a>
-<span class="sourceLineNo">174</span> " Maybe it is updated before
we replace it");<a name="line.174"></a>
-<span class="sourceLineNo">175</span> }<a name="line.175"></a>
-<span class="sourceLineNo">176</span> return oldValue;<a
name="line.176"></a>
-<span class="sourceLineNo">177</span> });<a name="line.177"></a>
-<span class="sourceLineNo">178</span> }<a name="line.178"></a>
-<span class="sourceLineNo">179</span><a name="line.179"></a>
-<span class="sourceLineNo">180</span>
@edu.umd.cs.findbugs.annotations.SuppressWarnings(value =
"UPM_UNCALLED_PRIVATE_METHOD",<a name="line.180"></a>
-<span class="sourceLineNo">181</span> justification = "Called by lambda
expression")<a name="line.181"></a>
-<span class="sourceLineNo">182</span> private void addToCache(HRegionLocation
loc) {<a name="line.182"></a>
-<span class="sourceLineNo">183</span>
addToCache(getTableCache(loc.getRegionInfo().getTable()), loc);<a
name="line.183"></a>
-<span class="sourceLineNo">184</span> if (LOG.isTraceEnabled()) {<a
name="line.184"></a>
-<span class="sourceLineNo">185</span> LOG.trace("Try adding " + loc + "
to cache");<a name="line.185"></a>
-<span class="sourceLineNo">186</span> }<a name="line.186"></a>
-<span class="sourceLineNo">187</span> }<a name="line.187"></a>
-<span class="sourceLineNo">188</span><a name="line.188"></a>
-<span class="sourceLineNo">189</span> private boolean
tryComplete(LocateRequest req, CompletableFuture<HRegionLocation>
future,<a name="line.189"></a>
-<span class="sourceLineNo">190</span> HRegionLocation loc) {<a
name="line.190"></a>
-<span class="sourceLineNo">191</span> if (future.isDone()) {<a
name="line.191"></a>
-<span class="sourceLineNo">192</span> return true;<a name="line.192"></a>
-<span class="sourceLineNo">193</span> }<a name="line.193"></a>
-<span class="sourceLineNo">194</span> boolean completed;<a
name="line.194"></a>
-<span class="sourceLineNo">195</span> if
(req.locateType.equals(RegionLocateType.BEFORE)) {<a name="line.195"></a>
-<span class="sourceLineNo">196</span> // for locating the row before
current row, the common case is to find the previous region in<a
name="line.196"></a>
-<span class="sourceLineNo">197</span> // reverse scan, so we check the
endKey first. In general, the condition should be startKey <<a
name="line.197"></a>
-<span class="sourceLineNo">198</span> // req.row and endKey >=
req.row. Here we split it to endKey == req.row || (endKey > req.row<a
name="line.198"></a>
-<span class="sourceLineNo">199</span> // && startKey <
req.row). The two conditions are equal since startKey < endKey.<a
name="line.199"></a>
-<span class="sourceLineNo">200</span> int c =
Bytes.compareTo(loc.getRegionInfo().getEndKey(), req.row);<a
name="line.200"></a>
-<span class="sourceLineNo">201</span> completed =<a name="line.201"></a>
-<span class="sourceLineNo">202</span> c == 0 || (c > 0 &&
Bytes.compareTo(loc.getRegionInfo().getStartKey(), req.row) < 0);<a
name="line.202"></a>
-<span class="sourceLineNo">203</span> } else {<a name="line.203"></a>
-<span class="sourceLineNo">204</span> completed =
loc.getRegionInfo().containsRow(req.row);<a name="line.204"></a>
-<span class="sourceLineNo">205</span> }<a name="line.205"></a>
-<span class="sourceLineNo">206</span> if (completed) {<a
name="line.206"></a>
-<span class="sourceLineNo">207</span> future.complete(loc);<a
name="line.207"></a>
-<span class="sourceLineNo">208</span> return true;<a name="line.208"></a>
-<span class="sourceLineNo">209</span> } else {<a name="line.209"></a>
-<span class="sourceLineNo">210</span> return false;<a name="line.210"></a>
-<span class="sourceLineNo">211</span> }<a name="line.211"></a>
-<span class="sourceLineNo">212</span> }<a name="line.212"></a>
-<span class="sourceLineNo">213</span><a name="line.213"></a>
-<span class="sourceLineNo">214</span> private void complete(TableName
tableName, LocateRequest req, HRegionLocation loc,<a name="line.214"></a>
-<span class="sourceLineNo">215</span> Throwable error) {<a
name="line.215"></a>
-<span class="sourceLineNo">216</span> if (error != null) {<a
name="line.216"></a>
-<span class="sourceLineNo">217</span> if (LOG.isDebugEnabled()) {<a
name="line.217"></a>
-<span class="sourceLineNo">218</span> LOG.debug("Failed to locate
region in '" + tableName + "', row='" +<a name="line.218"></a>
-<span class="sourceLineNo">219</span> Bytes.toStringBinary(req.row)
+ "', locateType=" + req.locateType,<a name="line.219"></a>
-<span class="sourceLineNo">220</span> error);<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> LocateRequest toSend = null;<a
name="line.223"></a>
-<span class="sourceLineNo">224</span> TableCache tableCache =
getTableCache(tableName);<a name="line.224"></a>
-<span class="sourceLineNo">225</span> if (loc != null) {<a
name="line.225"></a>
-<span class="sourceLineNo">226</span> if (!addToCache(tableCache, loc))
{<a name="line.226"></a>
-<span class="sourceLineNo">227</span> // someone is ahead of us.<a
name="line.227"></a>
-<span class="sourceLineNo">228</span> synchronized (tableCache) {<a
name="line.228"></a>
-<span class="sourceLineNo">229</span>
tableCache.pendingRequests.remove(req);<a name="line.229"></a>
-<span class="sourceLineNo">230</span> }<a name="line.230"></a>
-<span class="sourceLineNo">231</span> return;<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>
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name="line.234"></a>
-<span class="sourceLineNo">235</span>
tableCache.pendingRequests.remove(req);<a name="line.235"></a>
-<span class="sourceLineNo">236</span> if (error instanceof
DoNotRetryIOException) {<a name="line.236"></a>
-<span class="sourceLineNo">237</span> CompletableFuture<?> future
= tableCache.allRequests.remove(req);<a name="line.237"></a>
-<span class="sourceLineNo">238</span> if (future != null) {<a
name="line.238"></a>
-<span class="sourceLineNo">239</span>
future.completeExceptionally(error);<a name="line.239"></a>
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-<span class="sourceLineNo">242</span> if (loc != null) {<a
name="line.242"></a>
-<span class="sourceLineNo">243</span> for
(Iterator<Map.Entry<LocateRequest,
CompletableFuture<HRegionLocation>>> iter =<a name="line.243"></a>
-<span class="sourceLineNo">244</span>
tableCache.allRequests.entrySet().iterator(); iter.hasNext();) {<a
name="line.244"></a>
-<span class="sourceLineNo">245</span> Map.Entry<LocateRequest,
CompletableFuture<HRegionLocation>> entry = iter.next();<a
name="line.245"></a>
-<span class="sourceLineNo">246</span> if (tryComplete(entry.getKey(),
entry.getValue(), loc)) {<a name="line.246"></a>
-<span class="sourceLineNo">247</span> iter.remove();<a
name="line.247"></a>
-<span class="sourceLineNo">248</span> }<a name="line.248"></a>
-<span class="sourceLineNo">249</span> }<a name="line.249"></a>
-<span class="sourceLineNo">250</span> }<a name="line.250"></a>
-<span class="sourceLineNo">251</span> if
(!tableCache.allRequests.isEmpty() &&<a name="line.251"></a>
-<span class="sourceLineNo">252</span>
tableCache.hasQuota(maxConcurrentLocateRequestPerTable)) {<a
name="line.252"></a>
-<span class="sourceLineNo">253</span> LocateRequest[] candidates =
tableCache.allRequests.keySet().stream()<a name="line.253"></a>
-<span class="sourceLineNo">254</span> .filter(r ->
!tableCache.isPending(r)).toArray(LocateRequest[]::new);<a name="line.254"></a>
-<span class="sourceLineNo">255</span> if (candidates.length > 0) {<a
name="line.255"></a>
-<span class="sourceLineNo">256</span> // TODO: use a better algorithm
to send a request which is more likely to fetch a new<a name="line.256"></a>
-<span class="sourceLineNo">257</span> // location.<a
name="line.257"></a>
-<span class="sourceLineNo">258</span> toSend =
candidates[ThreadLocalRandom.current().nextInt(candidates.length)];<a
name="line.258"></a>
-<span class="sourceLineNo">259</span> tableCache.send(toSend);<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> }<a name="line.262"></a>
-<span class="sourceLineNo">263</span> if (toSend != null) {<a
name="line.263"></a>
-<span class="sourceLineNo">264</span> locateInMeta(tableName, toSend);<a
name="line.264"></a>
-<span class="sourceLineNo">265</span> }<a name="line.265"></a>
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tableName, LocateRequest req, List<Result> results,<a name="line.268"></a>
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name="line.269"></a>
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name="line.270"></a>
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error);<a name="line.271"></a>
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name="line.274"></a>
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MetaTableAccessor.getRegionLocations(results.get(0));<a name="line.278"></a>
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name="line.279"></a>
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"', locateType=" + req.locateType + " is " + locs);<a name="line.281"></a>
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+<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>
AsyncNonMetaRegionLocator(AsyncConnectionImpl conn) {<a name="line.168"></a>
+<span class="sourceLineNo">169</span> this.conn = conn;<a
name="line.169"></a>
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this.maxConcurrentLocateRequestPerTable = conn.getConfiguration().getInt(<a
name="line.170"></a>
+<span class="sourceLineNo">171</span>
MAX_CONCURRENT_LOCATE_REQUEST_PER_TABLE,
DEFAULT_MAX_CONCURRENT_LOCATE_REQUEST_PER_TABLE);<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>
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getTableCache(TableName tableName) {<a name="line.174"></a>
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tableName, TableCache::new);<a name="line.175"></a>
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+<span class="sourceLineNo">177</span><a name="line.177"></a>
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removeFromCache(HRegionLocation loc) {<a name="line.178"></a>
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cache.get(loc.getRegionInfo().getTable());<a name="line.179"></a>
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name="line.180"></a>
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+<span class="sourceLineNo">183</span>
tableCache.cache.computeIfPresent(loc.getRegionInfo().getStartKey(), (k,
oldLoc) -> {<a name="line.183"></a>
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loc.getSeqNum() ||<a name="line.184"></a>
+<span class="sourceLineNo">185</span>
!oldLoc.getServerName().equals(loc.getServerName())) {<a name="line.185"></a>
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name="line.186"></a>
+<span class="sourceLineNo">187</span> }<a name="line.187"></a>
+<span class="sourceLineNo">188</span> return null;<a name="line.188"></a>
+<span class="sourceLineNo">189</span> });<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> // return whether we add this loc to
cache<a name="line.192"></a>
+<span class="sourceLineNo">193</span> private boolean addToCache(TableCache
tableCache, HRegionLocation loc) {<a name="line.193"></a>
+<span class="sourceLineNo">194</span> if (LOG.isTraceEnabled()) {<a
name="line.194"></a>
+<span class="sourceLineNo">195</span> LOG.trace("Try adding " + loc + "
to cache");<a name="line.195"></a>
+<span class="sourceLineNo">196</span> }<a name="line.196"></a>
+<span class="sourceLineNo">197</span> byte[] startKey =
loc.getRegionInfo().getStartKey();<a name="line.197"></a>
+<span class="sourceLineNo">198</span> HRegionLocation oldLoc =
tableCache.cache.putIfAbsent(startKey, loc);<a name="line.198"></a>
+<span class="sourceLineNo">199</span> if (oldLoc == null) {<a
name="line.199"></a>
+<span class="sourceLineNo">200</span> return true;<a name="line.200"></a>
+<span class="sourceLineNo">201</span> }<a name="line.201"></a>
+<span class="sourceLineNo">202</span> if (oldLoc.getSeqNum() >
loc.getSeqNum() ||<a name="line.202"></a>
+<span class="sourceLineNo">203</span>
oldLoc.getServerName().equals(loc.getServerName())) {<a name="line.203"></a>
+<span class="sourceLineNo">204</span> if (LOG.isTraceEnabled()) {<a
name="line.204"></a>
+<span class="sourceLineNo">205</span> LOG.trace("Will not add " + loc +
" to cache because the old value " + oldLoc +<a name="line.205"></a>
+<span class="sourceLineNo">206</span> " is newer than us or has the
same server name");<a name="line.206"></a>
+<span class="sourceLineNo">207</span> }<a name="line.207"></a>
+<span class="sourceLineNo">208</span> return false;<a name="line.208"></a>
+<span class="sourceLineNo">209</span> }<a name="line.209"></a>
+<span class="sourceLineNo">210</span> return loc ==
tableCache.cache.compute(startKey, (k, oldValue) -> {<a name="line.210"></a>
+<span class="sourceLineNo">211</span> if (oldValue == null ||
oldValue.getSeqNum() <= loc.getSeqNum()) {<a name="line.211"></a>
+<span class="sourceLineNo">212</span> return loc;<a name="line.212"></a>
+<span class="sourceLineNo">213</span> }<a name="line.213"></a>
+<span class="sourceLineNo">214</span> if (LOG.isTraceEnabled()) {<a
name="line.214"></a>
+<span class="sourceLineNo">215</span> LOG.trace("Will not add " + loc +
" to cache because the old value " + oldValue +<a name="line.215"></a>
+<span class="sourceLineNo">216</span> " is newer than us or has the
same server name." +<a name="line.216"></a>
+<span class="sourceLineNo">217</span> " Maybe it is updated before
we replace it");<a name="line.217"></a>
+<span class="sourceLineNo">218</span> }<a name="line.218"></a>
+<span class="sourceLineNo">219</span> return oldValue;<a
name="line.219"></a>
+<span class="sourceLineNo">220</span> });<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>
@edu.umd.cs.findbugs.annotations.SuppressWarnings(value =
"UPM_UNCALLED_PRIVATE_METHOD",<a name="line.223"></a>
+<span class="sourceLineNo">224</span> justification = "Called by lambda
expression")<a name="line.224"></a>
+<span class="sourceLineNo">225</span> private void addToCache(HRegionLocation
loc) {<a name="line.225"></a>
+<span class="sourceLineNo">226</span>
addToCache(getTableCache(loc.getRegionInfo().getTable()), loc);<a
name="line.226"></a>
+<span class="sourceLineNo">227</span> if (LOG.isTraceEnabled()) {<a
name="line.227"></a>
+<span class="sourceLineNo">228</span> LOG.trace("Try adding " + loc + "
to cache");<a name="line.228"></a>
+<span class="sourceLineNo">229</span> }<a name="line.229"></a>
+<span class="sourceLineNo">230</span> }<a name="line.230"></a>
+<span class="sourceLineNo">231</span><a name="line.231"></a>
+<span class="sourceLineNo">232</span> private void complete(TableName
tableName, LocateRequest req, HRegionLocation loc,<a name="line.232"></a>
+<span class="sourceLineNo">233</span> Throwable error) {<a
name="line.233"></a>
+<span class="sourceLineNo">234</span> if (error != null) {<a
name="line.234"></a>
+<span class="sourceLineNo">235</span> LOG.warn(<a name="line.235"></a>
+<span class="sourceLineNo">236</span> "Failed to locate region in '" +
tableName + "', row='" + Bytes.toStringBinary(req.row)<a name="line.236"></a>
+<span class="sourceLineNo">237</span> + "', locateType=" +
req.locateType, error);<a name="line.237"></a>
+<span class="sourceLineNo">238</span> }<a name="line.238"></a>
+<span class="sourceLineNo">239</span> Optional<LocateRequest> toSend
= Optional.empty();<a name="line.239"></a>
+<span class="sourceLineNo">240</span> TableCache tableCache =
getTableCache(tableName);<a name="line.240"></a>
+<span class="sourceLineNo">241</span> if (loc != null) {<a
name="line.241"></a>
+<span class="sourceLineNo">242</span> if (!addToCache(tableCache, loc))
{<a name="line.242"></a>
+<span class="sourceLineNo">243</span> // someone is ahead of us.<a
name="line.243"></a>
+<span class="sourceLineNo">244</span> synchronized (tableCache) {<a
name="line.244"></a>
+<span class="sourceLineNo">245</span>
tableCache.pendingRequests.remove(req);<a name="line.245"></a>
+<span class="sourceLineNo">246</span>
tableCache.clearCompletedRequests(Optional.empty());<a name="line.246"></a>
+<span class="sourceLineNo">247</span> // Remove a complete locate
request in a synchronized block, so the table cache must have<a
name="line.247"></a>
+<span class="sourceLineNo">248</span> // quota to send a candidate
request.<a name="line.248"></a>
+<span class="sourceLineNo">249</span> toSend =
tableCache.getCandidate();<a name="line.249"></a>
+<span class="sourceLineNo">250</span> toSend.ifPresent(r ->
tableCache.send(r));<a name="line.250"></a>
+<span class="sourceLineNo">251</span> }<a name="line.251"></a>
+<span class="sourceLineNo">252</span> toSend.ifPresent(r ->
locateInMeta(tableName, r));<a name="line.252"></a>
+<span class="sourceLineNo">253</span> return;<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> synchronized (tableCache) {<a
name="line.256"></a>
+<span class="sourceLineNo">257</span>
tableCache.pendingRequests.remove(req);<a name="line.257"></a>
+<span class="sourceLineNo">258</span> if (error instanceof
DoNotRetryIOException) {<a name="line.258"></a>
+<span class="sourceLineNo">259</span> CompletableFuture<?> future
= tableCache.allRequests.remove(req);<a name="line.259"></a>
+<span class="sourceLineNo">260</span> if (future != null) {<a
name="line.260"></a>
+<span class="sourceLineNo">261</span>
future.completeExceptionally(error);<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>
tableCache.clearCompletedRequests(Optional.ofNullable(loc));<a
name="line.264"></a>
+<span class="sourceLineNo">265</span> // Remove a complete locate request
in a synchronized block, so the table cache must have<a name="line.265"></a>
+<span class="sourceLineNo">266</span> // quota to send a candidate
request.<a name="line.266"></a>
+<span class="sourceLineNo">267</span> toSend =
tableCache.getCandidate();<a name="line.267"></a>
+<span class="sourceLineNo">268</span> toSend.ifPresent(r ->
tableCache.send(r));<a name="line.268"></a>
+<span class="sourceLineNo">269</span> }<a name="line.269"></a>
+<span class="sourceLineNo">270</span> toSend.ifPresent(r ->
locateInMeta(tableName, r));<a name="line.270"></a>
+<span class="sourceLineNo">271</span> }<a name="line.271"></a>
+<span class="sourceLineNo">272</span><a name="line.272"></a>
+<span class="sourceLineNo">273</span> private void onScanComplete(TableName
tableName, LocateRequest req, List<Result> results,<a name="line.273"></a>
+<span class="sourceLineNo">274</span> Throwable error) {<a
name="line.274"></a>
+<span class="sourceLineNo">275</span> if (error != null) {<a
name="line.275"></a>
+<span class="sourceLineNo">276</span> complete(tableName, req, null,
error);<a name="line.276"></a>
+<span class="sourceLineNo">277</span> return;<a name="line.277"></a>
+<span class="sourceLineNo">278</span> }<a name="line.278"></a>
+<span class="sourceLineNo">279</span> if (results.isEmpty()) {<a
name="line.279"></a>
+<span class="sourceLineNo">280</span> complete(tableName, req, null, new
TableNotFoundException(tableName));<a name="line.280"></a>
+<span class="sourceLineNo">281</span> return;<a name="line.281"></a>
<span class="sourceLineNo">282</span> }<a name="line.282"></a>
-<span class="sourceLineNo">283</span> if (locs == null ||
locs.getDefaultRegionLocation() == null) {<a name="line.283"></a>
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name="line.284"></a>
-<span class="sourceLineNo">285</span> new IOException(String.format("No
location found for '%s', row='%s', locateType=%s",<a name="line.285"></a>
-<span class="sourceLineNo">286</span> tableName,
Bytes.toStringBinary(req.row), req.locateType)));<a name="line.286"></a>
-<span class="sourceLineNo">287</span> return;<a name="line.287"></a>
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-<span class="sourceLineNo">289</span> HRegionLocation loc =
locs.getDefaultRegionLocation();<a name="line.289"></a>
-<span class="sourceLineNo">290</span> HRegionInfo info =
loc.getRegionInfo();<a name="line.290"></a>
-<span class="sourceLineNo">291</span> if (info == null) {<a
name="line.291"></a>
-<span class="sourceLineNo">292</span> complete(tableName, req, null,<a
name="line.292"></a>
-<span class="sourceLineNo">293</span> new
IOException(String.format("HRegionInfo is null for '%s', row='%s',
locateType=%s",<a name="line.293"></a>
-<span class="sourceLineNo">294</span> tableName,
Bytes.toStringBinary(req.row), req.locateType)));<a name="line.294"></a>
-<span class="sourceLineNo">295</span> return;<a name="line.295"></a>
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-<span class="sourceLineNo">297</span> if
(!info.getTable().equals(tableName)) {<a name="line.297"></a>
-<span class="sourceLineNo">298</span> complete(tableName, req, null, new
TableNotFoundException(<a name="line.298"></a>
-<span class="sourceLineNo">299</span> "Table '" + tableName + "' was
not found, got: '" + info.getTable() + "'"));<a name="line.299"></a>
+<span class="sourceLineNo">283</span> RegionLocations locs =
MetaTableAccessor.getRegionLocations(results.get(0));<a name="line.283"></a>
+<span class="sourceLineNo">284</span> if (LOG.isDebugEnabled()) {<a
name="line.284"></a>
+<span class="sourceLineNo">285</span> LOG.debug("The fetched location of
'" + tableName + "', row='" +<a name="line.285"></a>
+<span class="sourceLineNo">286</span> Bytes.toStringBinary(req.row) +
"', locateType=" + req.locateType + " is " + locs);<a name="line.286"></a>
+<span class="sourceLineNo">287</span> }<a name="line.287"></a>
+<span class="sourceLineNo">288</span> if (locs == null ||
locs.getDefaultRegionLocation() == null) {<a name="line.288"></a>
+<span class="sourceLineNo">289</span> complete(tableName, req, null,<a
name="line.289"></a>
+<span class="sourceLineNo">290</span> new IOException(String.format("No
location found for '%s', row='%s', locateType=%s",<a name="line.290"></a>
+<span class="sourceLineNo">291</span> tableName,
Bytes.toStringBinary(req.row), req.locateType)));<a name="line.291"></a>
+<span class="sourceLineNo">292</span> return;<a name="line.292"></a>
+<span class="sourceLineNo">293</span> }<a name="line.293"></a>
+<span class="sourceLineNo">294</span> HRegionLocation loc =
locs.getDefaultRegionLocation();<a name="line.294"></a>
+<span class="sourceLineNo">295</span> HRegionInfo info =
loc.getRegionInfo();<a name="line.295"></a>
+<span class="sourceLineNo">296</span> if (info == null) {<a
name="line.296"></a>
+<span class="sourceLineNo">297</span> complete(tableName, req, null,<a
name="line.297"></a>
+<span class="sourceLineNo">298</span> new
IOException(String.format("HRegionInfo is null for '%s', row='%s',
locateType=%s",<a name="line.298"></a>
+<span class="sourceLineNo">299</span> tableName,
Bytes.toStringBinary(req.row), req.locateType)));<a name="line.299"></a>
<span class="sourceLineNo">300</span> return;<a name="line.300"></a>
<span class="sourceLineNo">301</span> }<a name="line.301"></a>
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name="line.302"></a>
-<span class="sourceLineNo">303</span> complete(tableName, req, null,<a
name="line.303"></a>
-<span class="sourceLineNo">304</span> new RegionOfflineException(<a
name="line.304"></a>
-<span class="sourceLineNo">305</span> "the only available region
for the required row is a split parent," +<a name="line.305"></a>
-<span class="sourceLineNo">306</span> " the daughters should be
online soon: '" + info.getRegionNameAsString() + "'"));<a name="line.306"></a>
-<span class="sourceLineNo">307</span> return;<a name="line.307"></a>
-<span class="sourceLineNo">308</span> }<a name="line.308"></a>
-<span class="sourceLineNo">309</span> if (info.isOffline()) {<a
name="line.309"></a>
-<span class="sourceLineNo">310</span> complete(tableName, req, null, new
RegionOfflineException("the region is offline, could" +<a name="line.310"></a>
-<span class="sourceLineNo">311</span> " be caused by a disable table
call: '" + info.getRegionNameAsString() + "'"));<a name="line.311"></a>
+<span class="sourceLineNo">302</span> if
(!info.getTable().equals(tableName)) {<a name="line.302"></a>
+<span class="sourceLineNo">303</span> complete(tableName, req, null, new
TableNotFoundException(<a name="line.303"></a>
+<span class="sourceLineNo">304</span> "Table '" + tableName + "' was
not found, got: '" + info.getTable() + "'"));<a name="line.304"></a>
+<span class="sourceLineNo">305</span> return;<a name="line.305"></a>
+<span class="sourceLineNo">306</span> }<a name="line.306"></a>
+<span class="sourceLineNo">307</span> if (info.isSplit()) {<a
name="line.307"></a>
+<span class="sourceLineNo">308</span> complete(tableName, req, null,<a
name="line.308"></a>
+<span class="sourceLineNo">309</span> new RegionOfflineException(<a
name="line.309"></a>
+<span class="sourceLineNo">310</span> "the only available region
for the required row is a split parent," +<a name="line.310"></a>
+<span class="sourceLineNo">311</span> " the daughters should be
online soon: '" + info.getRegionNameAsString() + "'"));<a name="line.311"></a>
<span class="sourceLineNo">312</span> return;<a name="line.312"></a>
<span class="sourceLineNo">313</span> }<a name="line.313"></a>
-<span class="sourceLineNo">314</span> if (loc.getServerName() == null) {<a
name="line.314"></a>
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name="line.315"></a>
-<span class="sourceLineNo">316</span> new NoServerForRegionException(<a
name="line.316"></a>
-<span class="sourceLineNo">317</span> String.format("No server
address listed for region '%s', row='%s', locateType=%s",<a name="line.317"></a>
-<span class="sourceLineNo">318</span>
info.getRegionNameAsString(), Bytes.toStringBinary(req.row),
req.locateType)));<a name="line.318"></a>
-<span class="sourceLineNo">319</span> return;<a name="line.319"></a>
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-<span class="sourceLineNo">321</span> complete(tableName, req, loc,
null);<a name="line.321"></a>
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locateRowInCache(TableCache tableCache, TableName tableName, byte[] row) {<a
name="line.324"></a>
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HRegionLocation> entry = tableCache.cache.floorEntry(row);<a
name="line.325"></a>
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name="line.326"></a>
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-<span class="sourceLineNo">328</span> }<a name="line.328"></a>
-<span class="sourceLineNo">329</span> HRegionLocation loc =
entry.getValue();<a name="line.329"></a>
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loc.getRegionInfo().getEndKey();<a name="line.330"></a>
-<span class="sourceLineNo">331</span> if (isEmptyStopRow(endKey) ||
Bytes.compareTo(row, endKey) < 0) {<a name="line.331"></a>
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name="line.332"></a>
-<span class="sourceLineNo">333</span> LOG.trace("Found " + loc + " in
cache for '" + tableName + "', row='" +<a name="line.333"></a>
-<span class="sourceLineNo">334</span> Bytes.toStringBinary(row) +
"', locateType=" + RegionLocateType.CURRENT);<a name="line.334"></a>
-<span class="sourceLineNo">335</span> }<a name="line.335"></a>
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-<span class="sourceLineNo">341</span><a name="line.341"></a>
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locateRowBeforeInCache(TableCache tableCache, TableName tableName,<a
name="line.342"></a>
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HRegionLocation> entry =<a name="line.344"></a>
-<span class="sourceLineNo">345</span> isEmptyStopRow(row) ?
tableCache.cache.lastEntry() : tableCache.cache.lowerEntry(row);<a
name="line.345"></a>
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locateType.equals(RegionLocateType.BEFORE)<a name="line.386"></a>
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getTableCache(tableName);<a name="line.398"></a>
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CompletableFuture<HRegionLocation> getRegionLocation(TableName tableName,
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boolean reload) {<a name="line.434"></a>
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getRegionLocationInternal(tableName, row, RegionLocateType.CURRENT, reload);<a
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AsyncRegionLocator.updateCachedLocation(loc, exception, l -> {<a
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tableCache.cache.get(l.getRegionInfo().getStartKey());<a name="line.453"></a>
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this::removeFromCache);<a name="line.454"></a>
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tableCache.allRequests.values().forEach(f ->
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+<span class="sourceLineNo">314</span> if (info.isOffline()) {<a
name="line.314"></a>
+<span class="sourceLineNo">315</span> complete(tableName, req, null, new
RegionOfflineException("the region is offline, could" +<a name="line.315"></a>
+<span class="sourceLineNo">316</span> " be caused by a disable table
call: '" + info.getRegionNameAsString() + "'"));<a name="line.316"></a>
+<span class="sourceLineNo">317</span> return;<a name="line.317"></a>
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+<span class="sourceLineNo">319</span> if (loc.getServerName() == null) {<a
name="line.319"></a>
+<span class="sourceLineNo">320</span> complete(tableName, req, null,<a
name="line.320"></a>
+<span class="sourceLineNo">321</span> new NoServerForRegionException(<a
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+<span class="sourceLineNo">322</span> String.format("No server
address listed for region '%s', row='%s', locateType=%s",<a name="line.322"></a>
+<span class="sourceLineNo">323</span>
info.getRegionNameAsString(), Bytes.toStringBinary(req.row),
req.locateType)));<a name="line.323"></a>
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null);<a name="line.326"></a>
+<span class="sourceLineNo">327</span> }<a name="line.327"></a>
+<span class="sourceLineNo">328</span><a name="line.328"></a>
+<span class="sourceLineNo">329</span> private HRegionLocation
locateRowInCache(TableCache tableCache, TableName tableName, byte[] row) {<a
name="line.329"></a>
+<span class="sourceLineNo">330</span> Map.Entry<byte[],
HRegionLocation> entry = tableCache.cache.floorEntry(row);<a
name="line.330"></a>
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name="line.331"></a>
+<span class="sourceLineNo">332</span> return null;<a name="line.332"></a>
+<span class="sourceLineNo">333</span> }<a name="line.333"></a>
+<span class="sourceLineNo">334</span> HRegionLocation loc =
entry.getValue();<a name="line.334"></a>
+<span class="sourceLineNo">335</span> byte[] endKey =
loc.getRegionInfo().getEndKey();<a name="line.335"></a>
+<span class="sourceLineNo">336</span> if (isEmptyStopRow(endKey) ||
Bytes.compareTo(row, endKey) < 0) {<a name="line.336"></a>
+<span class="sourceLineNo">337</span> if (LOG.isTraceEnabled()) {<a
name="line.337"></a>
+<span class="sourceLineNo">338</span> LOG.trace("Found " + loc + " in
cache for '" + tableName + "', row='" +<a name="line.338"></a>
+<span class="sourceLineNo">339</span> Bytes.toStringBinary(row) +
"', locateType=" + RegionLocateType.CURRENT);<a name="line.339"></a>
+<span class="sourceLineNo">340</span> }<a name="line.340"></a>
+<span class="sourceLineNo">341</span> return loc;<a name="line.341"></a>
+<span class="sourceLineNo">342</span> } else {<a name="line.342"></a>
+<span class="sourceLineNo">343</span> return null;<a name="line.343"></a>
+<span class="sourceLineNo">344</span> }<a name="line.344"></a>
+<span class="sourceLineNo">345</span> }<a name="line.345"></a>
+<span class="sourceLineNo">346</span><a name="line.346"></a>
+<span class="sourceLineNo">347</span> private HRegionLocation
locateRowBeforeInCache(TableCache tableCache, TableName tableName,<a
name="line.347"></a>
+<span class="sourceLineNo">348</span> byte[] row) {<a name="line.348"></a>
+<span class="sourceLineNo">349</span> Map.Entry<byte[],
HRegionLocation> entry =<a name="line.349"></a>
+<span class="sourceLineNo">350</span> isEmptyStopRow(row) ?
tableCache.cache.lastEntry() : tableCache.cache.lowerEntry(row);<a
name="line.350"></a>
+<span class="sourceLineNo">351</span> if (entry == null) {<a
name="line.351"></a>
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+<span class="sourceLineNo">353</span> }<a name="line.353"></a>
+<span class="sourceLineNo">354</span> HRegionLocation loc =
entry.getValue();<a name="line.354"></a>
+<span class="sourceLineNo">355</span> if
(isEmptyStopRow(loc.getRegionInfo().getEndKey()) ||<a name="line.355"></a>
+<span class="sourceLineNo">356</span>
Bytes.compareTo(loc.getRegionInfo().getEndKey(), row) >= 0) {<a
name="line.356"></a>
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name="line.357"></a>
+<span class="sourceLineNo">358</span> LOG.trace("Found " + loc + " in
cache for '" + tableName + "', row='" +<a name="line.358"></a>
+<span class="sourceLineNo">359</span> Bytes.toStringBinary(row) +
"', locateType=" + RegionLocateType.BEFORE);<a name="line.359"></a>
+<span class="sourceLineNo">360</span> }<a name="line.360"></a>
+<span class="sourceLineNo">361</span> return loc;<a name="line.361"></a>
+<span class="sourceLineNo">362</span> } else {<a name="line.362"></a>
+<span class="sourceLineNo">363</span> return null;<a name="line.363"></a>
+<span class="sourceLineNo">364</span> }<a name="line.364"></a>
+<span class="sourceLineNo">365</span> }<a name="line.365"></a>
+<span class="sourceLineNo">366</span><a name="line.366"></a>
+<span class="sourceLineNo">367</span> private void locateInMeta(TableName
tableName, LocateRequest req) {<a name="line.367"></a>
+<span class="sourceLineNo">368</span> if (LOG.isTraceEnabled()) {<a
name="line.368"></a>
+<span class="sourceLineNo">369</span> LOG.trace("Try locate '" +
tableName + "', row='" + Bytes.toStringBinary(req.row) +<a name="line.369"></a>
+<span class="sourceLineNo">370</span> "', locateType=" +
req.locateType + " in meta");<a name="line.370"></a>
+<span class="sourceLineNo">371</span> }<a name="line.371"></a>
+<span class="sourceLineNo">372</span> byte[] metaKey;<a name="line.372"></a>
+<span class="sourceLineNo">373</span> if
(req.locateType.equals(RegionLocateType.BEFORE)) {<a name="line.373"></a>
+<span class="sourceLineNo">374</span> if (isEmptyStopRow(req.row)) {<a
name="line.374"></a>
+<span class="sourceLineNo">375</span> byte[] binaryTableName =
tableName.getName();<a name="line.375"></a>
+<span class="sourceLineNo">376</span> metaKey =
Arrays.copyOf(binaryTableName, binaryTableName.length + 1);<a
name="line.376"></a>
+<span class="sourceLineNo">377</span> } else {<a name="line.377"></a>
+<span class="sourceLineNo">378</span> metaKey =
createRegionName(tableName, req.row, ZEROES, false);<a name="line.378"></a>
+<span class="sourceLineNo">379</span> }<a name="line.379"></a>
+<span class="sourceLineNo">380</span> } else {<a name="line.380"></a>
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createRegionName(tableName, req.row, NINES, false);<a name="line.381"></a>
+<span class="sourceLineNo">382</span> }<a name="line.382"></a>
+<span class="sourceLineNo">383</span> conn.getRawTable(META_TABLE_NAME)<a
name="line.383"></a>
+<span class="sourceLineNo">384</span> .scanAll(new
Scan().withStartRow(metaKey).setReversed(true).addFamily(CATALOG_FAMILY)<a
name="line.384"></a>
+<span class="sourceLineNo">385</span> .setOneRowLimit())<a
name="line.385"></a>
+<span class="sourceLineNo">386</span> .whenComplete((results, error)
-> onScanComplete(tableName, req, results, error));<a name="line.386"></a>
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+<span class="sourceLineNo">388</span><a name="line.388"></a>
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locateInCache(TableCache tableCache, TableName tableName, byte[] row,<a
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name="line.390"></a>
+<span class="sourceLineNo">391</span> return
locateType.equals(RegionLocateType.BEFORE)<a name="line.391"></a>
+<span class="sourceLineNo">392</span> ?
locateRowBeforeInCache(tableCache, tableName, row)<a name="line.392"></a>
+<span class="sourceLineNo">393</span> : locateRowInCache(tableCache,
tableName, row);<a name="line.393"></a>
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+<span class="sourceLineNo">395</span><a name="line.395"></a>
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will use the start key of a region to locate the region<a name="line.396"></a>
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scan. See the comment of<a name="line.397"></a>
+<span class="sourceLineNo">398</span> //
AsyncRegionLocator.getPreviousRegionLocation.<a name="line.398"></a>
+<span class="sourceLineNo">399</span> private
CompletableFuture<HRegionLocation> getRegionLocationInternal(TableName
tableName,<a name="line.399"></a>
+<span class="sourceLineNo">400</span> byte[] row, RegionLocateType
locateType, boolean reload) {<a name="line.400"></a>
+<span class="sourceLineNo">401</span> // AFTER should be convert to CURRENT
before calling this method<a name="line.401"></a>
+<span class="sourceLineNo">402</span> assert
!locateType.equals(RegionLocateType.AFTER);<a name="line.402"></a>
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getTableCache(tableName);<a name="line.403"></a>
+<span class="sourceLineNo">404</span> if (!reload) {<a name="line.404"></a>
+<span class="sourceLineNo">405</span> HRegionLocation loc =
locateInCache(tableCache, tableName, row, locateType);<a name="line.405"></a>
+<span class="sourceLineNo">406</span> if (loc != null) {<a
name="line.406"></a>
+<span class="sourceLineNo">407</span> return
CompletableFuture.completedFuture(loc);<a name="line.407"></a>
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+<span class="sourceLineNo">409</span> }<a name="line.409"></a>
+<span class="sourceLineNo">410</span>
CompletableFuture<HRegionLocation> future;<a name="line.410"></a>
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name="line.411"></a>
+<span class="sourceLineNo">412</span> boolean sendRequest = false;<a
name="line.412"></a>
+<span class="sourceLineNo">413</span> synchronized (tableCache) {<a
name="line.413"></a>
+<span class="sourceLineNo">414</span> // check again<a
name="line.414"></a>
+<span class="sourceLineNo">415</span> if (!reload) {<a
name="line.415"></a>
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locateInCache(tableCache, tableName, row, locateType);<a name="line.416"></a>
+<span class="sourceLineNo">417</span> if (loc != null) {<a
name="line.417"></a>
+<span class="sourceLineNo">418</span> return
CompletableFuture.completedFuture(loc);<a name="line.418"></a>
+<span class="sourceLineNo">419</span> }<a name="line.419"></a>
+<span class="sourceLineNo">420</span> }<a name="line.420"></a>
+<span class="sourceLineNo">421</span> req = new LocateRequest(row,
locateType);<a name="line.421"></a>
+<span class="sourceLineNo">422</span> future =
tableCache.allRequests.get(req);<a name="line.422"></a>
+<span class="sourceLineNo">423</span> if (future == null) {<a
name="line.423"></a>
+<span class="sourceLineNo">424</span> future = new
CompletableFuture<>();<a name="line.424"></a>
+<span class="sourceLineNo">425</span> tableCache.allRequests.put(req,
future);<a name="line.425"></a>
+<span class="sourceLineNo">426</span> if
(tableCache.hasQuota(maxConcurrentLocateRequestPerTable) &&
!tableCache.isPending(req)) {<a name="line.426"></a>
+<span class="sourceLineNo">427</span> tableCache.send(req);<a
name="line.427"></a>
+<span class="sourceLineNo">428</span> sendRequest = true;<a
name="line.428"></a>
+<span class="sourceLineNo">429</span> }<a name="line.429"></a>
+<span class="sourceLineNo">430</span> }<a name="line.430"></a>
+<span class="sourceLineNo">431</span> }<a name="line.431"></a>
+<span class="sourceLineNo">432</span> if (sendRequest) {<a
name="line.432"></a>
+<span class="sourceLineNo">433</span> locateInMeta(tableName, req);<a
name="line.433"></a>
+<span class="sourceLineNo">434</span> }<a name="line.434"></a>
+<span class="sourceLineNo">435</span> return future;<a name="line.435"></a>
+<span class="sourceLineNo">436</span> }<a name="line.436"></a>
+<span class="sourceLineNo">437</span><a name="line.437"></a>
+<span class="sourceLineNo">438</span>
CompletableFuture<HRegionLocation> getRegionLocation(TableName tableName,
byte[] row,<a name="line.438"></a>
+<span class="sourceLineNo">439</span> RegionLocateType locateType,
boolean reload) {<a name="line.439"></a>
+<span class="sourceLineNo">440</span> if
(locateType.equals(RegionLocateType.BEFORE)) {<a name="line.440"></a>
+<span class="sourceLineNo">441</span> return
getRegionLocationInternal(tableName, row, locateType, reload);<a
name="line.441"></a>
+<span class="sourceLineNo">442</span> } else {<a name="line.442"></a>
+<span class="sourceLineNo">443</span> // as we know the exact row after
us, so we can just create the new row, and use the same<a name="line.443"></a>
+<span class="sourceLineNo">444</span> // algorithm to locate it.<a
name="line.444"></a>
+<span class="sourceLineNo">445</span> if
(locateType.equals(RegionLocateType.AFTER)) {<a name="line.445"></a>
+<span class="sourceLineNo">446</span> row =
createClosestRowAfter(row);<a name="line.446"></a>
+<span class="sourceLineNo">447</span> }<a name="line.447"></a>
+<span class="sourceLineNo">448</span> return
getRegionLocationInternal(tableName, row, RegionLocateType.CURRENT, reload);<a
name="line.448"></a>
+<span class="sourceLineNo">449</span> }<a name="line.449"></a>
+<span class="sourceLineNo">450</span> }<a name="line.450"></a>
+<span class="sourceLineNo">451</span><a name="line.451"></a>
+<span class="sourceLineNo">452</span> void
updateCachedLocation(HRegionLocation loc, Throwable exception) {<a
name="line.452"></a>
+<span class="sourceLineNo">453</span>
AsyncRegionLocator.updateCachedLocation(loc, exception, l -> {<a
name="line.453"></a>
+<span class="sourceLineNo">454</span> TableCache tableCache =
cache.get(l.getRegionInfo().getTable());<a name="line.454"></a>
+<span class="sourceLineNo">455</span> if (tableCache == null) {<a
name="line.455"></a>
+<span class="sourceLineNo">456</span> return null;<a
name="line.456"></a>
+<span class="sourceLineNo">457</span> }<a name="line.457"></a>
+<span class="sourceLineNo">458</span> return
tableCache.cache.get(l.getRegionInfo().getStartKey());<a name="line.458"></a>
+<span class="sourceLineNo">459</span> }, this::addToCache,
this::removeFromCache);<a name="line.459"></a>
+<span class="sourceLineNo">460</span> }<a name="line.460"></a>
+<span class="sourceLineNo">461</span><a name="line.461"></a>
+<span class="sourceLineNo">462</span> void clearCache(TableName tableName)
{<a name="line.462"></a>
+<span class="sourceLineNo">463</span> TableCache tableCache =
cache.remove(tableName);<a name="line.463"></a>
+<span class="sourceLineNo">464</span> if (tableCache == null) {<a
name="line.464"></a>
+<span class="sourceLineNo">465</span> return;<a name="line.465"></a>
+<span class="sourceLineNo">466</span> }<a name="line.466"></a>
+<span class="sourceLineNo">467</span> synchronized (tableCache) {<a
name="line.467"></a>
+<span class="sourceLineNo">468</span> if
(!tableCache.allRequests.isEmpty()) {<a name="line.468"></a>
+<span class="sourceLineNo">469</span> IOException error = new
IOException("Cache cleared");<a name="line.469"></a>
+<span class="sourceLineNo">470</span>
tableCache.allRequests.values().forEach(f ->
f.completeExceptionally(error));<a name="line.470"></a>
+<span class="sourceLineNo">471</span> }<a name="line.471"></a>
+<span class="sourceLineNo">472</span> }<a name="line.472"></a>
+<span class="sourceLineNo">473</span> }<a name="line.473"></a>
+<span class="sourceLineNo">474</span>}<a name="line.474"></a>
