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| <pre><span class="sourceLineNo">001</span>/*<a name="line.1"></a> |
| <span class="sourceLineNo">002</span> *<a name="line.2"></a> |
| <span class="sourceLineNo">003</span> * Licensed to the Apache Software Foundation (ASF) under one<a name="line.3"></a> |
| <span class="sourceLineNo">004</span> * or more contributor license agreements. See the NOTICE file<a name="line.4"></a> |
| <span class="sourceLineNo">005</span> * distributed with this work for additional information<a name="line.5"></a> |
| <span class="sourceLineNo">006</span> * regarding copyright ownership. The ASF licenses this file<a name="line.6"></a> |
| <span class="sourceLineNo">007</span> * to you under the Apache License, Version 2.0 (the<a name="line.7"></a> |
| <span class="sourceLineNo">008</span> * "License"); you may not use this file except in compliance<a name="line.8"></a> |
| <span class="sourceLineNo">009</span> * with the License. You may obtain a copy of the License at<a name="line.9"></a> |
| <span class="sourceLineNo">010</span> *<a name="line.10"></a> |
| <span class="sourceLineNo">011</span> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.11"></a> |
| <span class="sourceLineNo">012</span> *<a name="line.12"></a> |
| <span class="sourceLineNo">013</span> * Unless required by applicable law or agreed to in writing, software<a name="line.13"></a> |
| <span class="sourceLineNo">014</span> * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.14"></a> |
| <span class="sourceLineNo">015</span> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.15"></a> |
| <span class="sourceLineNo">016</span> * See the License for the specific language governing permissions and<a name="line.16"></a> |
| <span class="sourceLineNo">017</span> * limitations under the License.<a name="line.17"></a> |
| <span class="sourceLineNo">018</span> */<a name="line.18"></a> |
| <span class="sourceLineNo">019</span>package org.apache.hadoop.hbase.regionserver;<a name="line.19"></a> |
| <span class="sourceLineNo">020</span><a name="line.20"></a> |
| <span class="sourceLineNo">021</span>import org.apache.hbase.thirdparty.com.google.common.annotations.VisibleForTesting;<a name="line.21"></a> |
| <span class="sourceLineNo">022</span>import java.io.IOException;<a name="line.22"></a> |
| <span class="sourceLineNo">023</span>import java.util.List;<a name="line.23"></a> |
| <span class="sourceLineNo">024</span>import java.util.NavigableSet;<a name="line.24"></a> |
| <span class="sourceLineNo">025</span>import java.util.SortedSet;<a name="line.25"></a> |
| <span class="sourceLineNo">026</span><a name="line.26"></a> |
| <span class="sourceLineNo">027</span>import org.apache.hadoop.conf.Configuration;<a name="line.27"></a> |
| <span class="sourceLineNo">028</span>import org.apache.hadoop.hbase.Cell;<a name="line.28"></a> |
| <span class="sourceLineNo">029</span>import org.apache.hadoop.hbase.CellComparator;<a name="line.29"></a> |
| <span class="sourceLineNo">030</span>import org.apache.hadoop.hbase.ExtendedCell;<a name="line.30"></a> |
| <span class="sourceLineNo">031</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.31"></a> |
| <span class="sourceLineNo">032</span>import org.slf4j.Logger;<a name="line.32"></a> |
| <span class="sourceLineNo">033</span>import org.apache.hadoop.hbase.exceptions.UnexpectedStateException;<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.apache.hadoop.hbase.util.ClassSize;<a name="line.35"></a> |
| <span class="sourceLineNo">036</span>import org.apache.hadoop.hbase.util.EnvironmentEdgeManager;<a name="line.36"></a> |
| <span class="sourceLineNo">037</span><a name="line.37"></a> |
| <span class="sourceLineNo">038</span>/**<a name="line.38"></a> |
| <span class="sourceLineNo">039</span> * An abstract class, which implements the behaviour shared by all concrete memstore instances.<a name="line.39"></a> |
| <span class="sourceLineNo">040</span> */<a name="line.40"></a> |
| <span class="sourceLineNo">041</span>@InterfaceAudience.Private<a name="line.41"></a> |
| <span class="sourceLineNo">042</span>public abstract class AbstractMemStore implements MemStore {<a name="line.42"></a> |
| <span class="sourceLineNo">043</span><a name="line.43"></a> |
| <span class="sourceLineNo">044</span> private static final long NO_SNAPSHOT_ID = -1;<a name="line.44"></a> |
| <span class="sourceLineNo">045</span><a name="line.45"></a> |
| <span class="sourceLineNo">046</span> private final Configuration conf;<a name="line.46"></a> |
| <span class="sourceLineNo">047</span> private final CellComparator comparator;<a name="line.47"></a> |
| <span class="sourceLineNo">048</span><a name="line.48"></a> |
| <span class="sourceLineNo">049</span> // active segment absorbs write operations<a name="line.49"></a> |
| <span class="sourceLineNo">050</span> private volatile MutableSegment active;<a name="line.50"></a> |
| <span class="sourceLineNo">051</span> // Snapshot of memstore. Made for flusher.<a name="line.51"></a> |
| <span class="sourceLineNo">052</span> protected volatile ImmutableSegment snapshot;<a name="line.52"></a> |
| <span class="sourceLineNo">053</span> protected volatile long snapshotId;<a name="line.53"></a> |
| <span class="sourceLineNo">054</span> // Used to track when to flush<a name="line.54"></a> |
| <span class="sourceLineNo">055</span> private volatile long timeOfOldestEdit;<a name="line.55"></a> |
| <span class="sourceLineNo">056</span><a name="line.56"></a> |
| <span class="sourceLineNo">057</span> protected RegionServicesForStores regionServices;<a name="line.57"></a> |
| <span class="sourceLineNo">058</span><a name="line.58"></a> |
| <span class="sourceLineNo">059</span> public final static long FIXED_OVERHEAD = (long) ClassSize.OBJECT<a name="line.59"></a> |
| <span class="sourceLineNo">060</span> + (5 * ClassSize.REFERENCE)<a name="line.60"></a> |
| <span class="sourceLineNo">061</span> + (2 * Bytes.SIZEOF_LONG); // snapshotId, timeOfOldestEdit<a name="line.61"></a> |
| <span class="sourceLineNo">062</span><a name="line.62"></a> |
| <span class="sourceLineNo">063</span> public final static long DEEP_OVERHEAD = FIXED_OVERHEAD;<a name="line.63"></a> |
| <span class="sourceLineNo">064</span><a name="line.64"></a> |
| <span class="sourceLineNo">065</span> public static void addToScanners(List<? extends Segment> segments, long readPt,<a name="line.65"></a> |
| <span class="sourceLineNo">066</span> List<KeyValueScanner> scanners) {<a name="line.66"></a> |
| <span class="sourceLineNo">067</span> for (Segment item : segments) {<a name="line.67"></a> |
| <span class="sourceLineNo">068</span> addToScanners(item, readPt, scanners);<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><a name="line.71"></a> |
| <span class="sourceLineNo">072</span> protected static void addToScanners(Segment segment, long readPt,<a name="line.72"></a> |
| <span class="sourceLineNo">073</span> List<KeyValueScanner> scanners) {<a name="line.73"></a> |
| <span class="sourceLineNo">074</span> scanners.add(segment.getScanner(readPt));<a name="line.74"></a> |
| <span class="sourceLineNo">075</span> }<a name="line.75"></a> |
| <span class="sourceLineNo">076</span><a name="line.76"></a> |
| <span class="sourceLineNo">077</span> protected AbstractMemStore(final Configuration conf, final CellComparator c,<a name="line.77"></a> |
| <span class="sourceLineNo">078</span> final RegionServicesForStores regionServices) {<a name="line.78"></a> |
| <span class="sourceLineNo">079</span> this.conf = conf;<a name="line.79"></a> |
| <span class="sourceLineNo">080</span> this.comparator = c;<a name="line.80"></a> |
| <span class="sourceLineNo">081</span> this.regionServices = regionServices;<a name="line.81"></a> |
| <span class="sourceLineNo">082</span> resetActive();<a name="line.82"></a> |
| <span class="sourceLineNo">083</span> resetTimeOfOldestEdit();<a name="line.83"></a> |
| <span class="sourceLineNo">084</span> this.snapshot = SegmentFactory.instance().createImmutableSegment(c);<a name="line.84"></a> |
| <span class="sourceLineNo">085</span> this.snapshotId = NO_SNAPSHOT_ID;<a name="line.85"></a> |
| <span class="sourceLineNo">086</span> }<a name="line.86"></a> |
| <span class="sourceLineNo">087</span><a name="line.87"></a> |
| <span class="sourceLineNo">088</span> protected void resetActive() {<a name="line.88"></a> |
| <span class="sourceLineNo">089</span> // Record the MutableSegment' heap overhead when initialing<a name="line.89"></a> |
| <span class="sourceLineNo">090</span> MemStoreSizing memstoreAccounting = new NonThreadSafeMemStoreSizing();<a name="line.90"></a> |
| <span class="sourceLineNo">091</span> // Reset heap to not include any keys<a name="line.91"></a> |
| <span class="sourceLineNo">092</span> active = SegmentFactory.instance().createMutableSegment(conf, comparator, memstoreAccounting);<a name="line.92"></a> |
| <span class="sourceLineNo">093</span> // regionServices can be null when testing<a name="line.93"></a> |
| <span class="sourceLineNo">094</span> if (regionServices != null) {<a name="line.94"></a> |
| <span class="sourceLineNo">095</span> regionServices.addMemStoreSize(memstoreAccounting.getDataSize(),<a name="line.95"></a> |
| <span class="sourceLineNo">096</span> memstoreAccounting.getHeapSize(), memstoreAccounting.getOffHeapSize(),<a name="line.96"></a> |
| <span class="sourceLineNo">097</span> memstoreAccounting.getCellsCount());<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> protected void resetTimeOfOldestEdit() {<a name="line.101"></a> |
| <span class="sourceLineNo">102</span> this.timeOfOldestEdit = Long.MAX_VALUE;<a name="line.102"></a> |
| <span class="sourceLineNo">103</span> }<a name="line.103"></a> |
| <span class="sourceLineNo">104</span><a name="line.104"></a> |
| <span class="sourceLineNo">105</span> /**<a name="line.105"></a> |
| <span class="sourceLineNo">106</span> * Updates the wal with the lowest sequence id (oldest entry) that is still in memory<a name="line.106"></a> |
| <span class="sourceLineNo">107</span> * @param onlyIfMoreRecent a flag that marks whether to update the sequence id no matter what or<a name="line.107"></a> |
| <span class="sourceLineNo">108</span> * only if it is greater than the previous sequence id<a name="line.108"></a> |
| <span class="sourceLineNo">109</span> */<a name="line.109"></a> |
| <span class="sourceLineNo">110</span> public abstract void updateLowestUnflushedSequenceIdInWAL(boolean onlyIfMoreRecent);<a name="line.110"></a> |
| <span class="sourceLineNo">111</span><a name="line.111"></a> |
| <span class="sourceLineNo">112</span> @Override<a name="line.112"></a> |
| <span class="sourceLineNo">113</span> public void add(Iterable<Cell> cells, MemStoreSizing memstoreSizing) {<a name="line.113"></a> |
| <span class="sourceLineNo">114</span> for (Cell cell : cells) {<a name="line.114"></a> |
| <span class="sourceLineNo">115</span> add(cell, memstoreSizing);<a name="line.115"></a> |
| <span class="sourceLineNo">116</span> }<a name="line.116"></a> |
| <span class="sourceLineNo">117</span> }<a name="line.117"></a> |
| <span class="sourceLineNo">118</span><a name="line.118"></a> |
| <span class="sourceLineNo">119</span> @Override<a name="line.119"></a> |
| <span class="sourceLineNo">120</span> public void add(Cell cell, MemStoreSizing memstoreSizing) {<a name="line.120"></a> |
| <span class="sourceLineNo">121</span> doAddOrUpsert(cell, 0, memstoreSizing, true); }<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> * Inserts the specified Cell into MemStore and deletes any existing<a name="line.124"></a> |
| <span class="sourceLineNo">125</span> * versions of the same row/family/qualifier as the specified Cell.<a name="line.125"></a> |
| <span class="sourceLineNo">126</span> * <p><a name="line.126"></a> |
| <span class="sourceLineNo">127</span> * First, the specified Cell is inserted into the Memstore.<a name="line.127"></a> |
| <span class="sourceLineNo">128</span> * <p><a name="line.128"></a> |
| <span class="sourceLineNo">129</span> * If there are any existing Cell in this MemStore with the same row,<a name="line.129"></a> |
| <span class="sourceLineNo">130</span> * family, and qualifier, they are removed.<a name="line.130"></a> |
| <span class="sourceLineNo">131</span> * <p><a name="line.131"></a> |
| <span class="sourceLineNo">132</span> * Callers must hold the read lock.<a name="line.132"></a> |
| <span class="sourceLineNo">133</span> *<a name="line.133"></a> |
| <span class="sourceLineNo">134</span> * @param cell the cell to be updated<a name="line.134"></a> |
| <span class="sourceLineNo">135</span> * @param readpoint readpoint below which we can safely remove duplicate KVs<a name="line.135"></a> |
| <span class="sourceLineNo">136</span> * @param memstoreSizing object to accumulate changed size<a name="line.136"></a> |
| <span class="sourceLineNo">137</span> */<a name="line.137"></a> |
| <span class="sourceLineNo">138</span> private void upsert(Cell cell, long readpoint, MemStoreSizing memstoreSizing) {<a name="line.138"></a> |
| <span class="sourceLineNo">139</span> doAddOrUpsert(cell, readpoint, memstoreSizing, false);<a name="line.139"></a> |
| <span class="sourceLineNo">140</span> }<a name="line.140"></a> |
| <span class="sourceLineNo">141</span><a name="line.141"></a> |
| <span class="sourceLineNo">142</span> private void doAddOrUpsert(Cell cell, long readpoint, MemStoreSizing memstoreSizing, boolean<a name="line.142"></a> |
| <span class="sourceLineNo">143</span> doAdd) {<a name="line.143"></a> |
| <span class="sourceLineNo">144</span> MutableSegment currentActive;<a name="line.144"></a> |
| <span class="sourceLineNo">145</span> boolean succ = false;<a name="line.145"></a> |
| <span class="sourceLineNo">146</span> while (!succ) {<a name="line.146"></a> |
| <span class="sourceLineNo">147</span> currentActive = getActive();<a name="line.147"></a> |
| <span class="sourceLineNo">148</span> succ = preUpdate(currentActive, cell, memstoreSizing);<a name="line.148"></a> |
| <span class="sourceLineNo">149</span> if (succ) {<a name="line.149"></a> |
| <span class="sourceLineNo">150</span> if(doAdd) {<a name="line.150"></a> |
| <span class="sourceLineNo">151</span> doAdd(currentActive, cell, memstoreSizing);<a name="line.151"></a> |
| <span class="sourceLineNo">152</span> } else {<a name="line.152"></a> |
| <span class="sourceLineNo">153</span> doUpsert(currentActive, cell, readpoint, memstoreSizing);<a name="line.153"></a> |
| <span class="sourceLineNo">154</span> }<a name="line.154"></a> |
| <span class="sourceLineNo">155</span> postUpdate(currentActive);<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> }<a name="line.158"></a> |
| <span class="sourceLineNo">159</span><a name="line.159"></a> |
| <span class="sourceLineNo">160</span> private void doAdd(MutableSegment currentActive, Cell cell, MemStoreSizing memstoreSizing) {<a name="line.160"></a> |
| <span class="sourceLineNo">161</span> Cell toAdd = maybeCloneWithAllocator(currentActive, cell, false);<a name="line.161"></a> |
| <span class="sourceLineNo">162</span> boolean mslabUsed = (toAdd != cell);<a name="line.162"></a> |
| <span class="sourceLineNo">163</span> // This cell data is backed by the same byte[] where we read request in RPC(See<a name="line.163"></a> |
| <span class="sourceLineNo">164</span> // HBASE-15180). By default MSLAB is ON and we might have copied cell to MSLAB area. If<a name="line.164"></a> |
| <span class="sourceLineNo">165</span> // not we must do below deep copy. Or else we will keep referring to the bigger chunk of<a name="line.165"></a> |
| <span class="sourceLineNo">166</span> // memory and prevent it from getting GCed.<a name="line.166"></a> |
| <span class="sourceLineNo">167</span> // Copy to MSLAB would not have happened if<a name="line.167"></a> |
| <span class="sourceLineNo">168</span> // 1. MSLAB is turned OFF. See "hbase.hregion.memstore.mslab.enabled"<a name="line.168"></a> |
| <span class="sourceLineNo">169</span> // 2. When the size of the cell is bigger than the max size supported by MSLAB. See<a name="line.169"></a> |
| <span class="sourceLineNo">170</span> // "hbase.hregion.memstore.mslab.max.allocation". This defaults to 256 KB<a name="line.170"></a> |
| <span class="sourceLineNo">171</span> // 3. When cells are from Append/Increment operation.<a name="line.171"></a> |
| <span class="sourceLineNo">172</span> if (!mslabUsed) {<a name="line.172"></a> |
| <span class="sourceLineNo">173</span> toAdd = deepCopyIfNeeded(toAdd);<a name="line.173"></a> |
| <span class="sourceLineNo">174</span> }<a name="line.174"></a> |
| <span class="sourceLineNo">175</span> internalAdd(currentActive, toAdd, mslabUsed, memstoreSizing);<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> private void doUpsert(MutableSegment currentActive, Cell cell, long readpoint, MemStoreSizing<a name="line.178"></a> |
| <span class="sourceLineNo">179</span> memstoreSizing) {<a name="line.179"></a> |
| <span class="sourceLineNo">180</span> // Add the Cell to the MemStore<a name="line.180"></a> |
| <span class="sourceLineNo">181</span> // Use the internalAdd method here since we (a) already have a lock<a name="line.181"></a> |
| <span class="sourceLineNo">182</span> // and (b) cannot safely use the MSLAB here without potentially<a name="line.182"></a> |
| <span class="sourceLineNo">183</span> // hitting OOME - see TestMemStore.testUpsertMSLAB for a<a name="line.183"></a> |
| <span class="sourceLineNo">184</span> // test that triggers the pathological case if we don't avoid MSLAB<a name="line.184"></a> |
| <span class="sourceLineNo">185</span> // here.<a name="line.185"></a> |
| <span class="sourceLineNo">186</span> // This cell data is backed by the same byte[] where we read request in RPC(See<a name="line.186"></a> |
| <span class="sourceLineNo">187</span> // HBASE-15180). We must do below deep copy. Or else we will keep referring to the bigger<a name="line.187"></a> |
| <span class="sourceLineNo">188</span> // chunk of memory and prevent it from getting GCed.<a name="line.188"></a> |
| <span class="sourceLineNo">189</span> cell = deepCopyIfNeeded(cell);<a name="line.189"></a> |
| <span class="sourceLineNo">190</span> boolean sizeAddedPreOperation = sizeAddedPreOperation();<a name="line.190"></a> |
| <span class="sourceLineNo">191</span> currentActive.upsert(cell, readpoint, memstoreSizing, sizeAddedPreOperation);<a name="line.191"></a> |
| <span class="sourceLineNo">192</span> setOldestEditTimeToNow();<a name="line.192"></a> |
| <span class="sourceLineNo">193</span> }<a name="line.193"></a> |
| <span class="sourceLineNo">194</span><a name="line.194"></a> |
| <span class="sourceLineNo">195</span> /**<a name="line.195"></a> |
| <span class="sourceLineNo">196</span> * Issue any synchronization and test needed before applying the update<a name="line.196"></a> |
| <span class="sourceLineNo">197</span> * @param currentActive the segment to be updated<a name="line.197"></a> |
| <span class="sourceLineNo">198</span> * @param cell the cell to be added<a name="line.198"></a> |
| <span class="sourceLineNo">199</span> * @param memstoreSizing object to accumulate region size changes<a name="line.199"></a> |
| <span class="sourceLineNo">200</span> * @return true iff can proceed with applying the update<a name="line.200"></a> |
| <span class="sourceLineNo">201</span> */<a name="line.201"></a> |
| <span class="sourceLineNo">202</span> protected abstract boolean preUpdate(MutableSegment currentActive, Cell cell,<a name="line.202"></a> |
| <span class="sourceLineNo">203</span> MemStoreSizing memstoreSizing);<a name="line.203"></a> |
| <span class="sourceLineNo">204</span><a name="line.204"></a> |
| <span class="sourceLineNo">205</span> /**<a name="line.205"></a> |
| <span class="sourceLineNo">206</span> * Issue any post update synchronization and tests<a name="line.206"></a> |
| <span class="sourceLineNo">207</span> * @param currentActive updated segment<a name="line.207"></a> |
| <span class="sourceLineNo">208</span> */<a name="line.208"></a> |
| <span class="sourceLineNo">209</span> protected abstract void postUpdate(MutableSegment currentActive);<a name="line.209"></a> |
| <span class="sourceLineNo">210</span><a name="line.210"></a> |
| <span class="sourceLineNo">211</span> private static Cell deepCopyIfNeeded(Cell cell) {<a name="line.211"></a> |
| <span class="sourceLineNo">212</span> if (cell instanceof ExtendedCell) {<a name="line.212"></a> |
| <span class="sourceLineNo">213</span> return ((ExtendedCell) cell).deepClone();<a name="line.213"></a> |
| <span class="sourceLineNo">214</span> }<a name="line.214"></a> |
| <span class="sourceLineNo">215</span> return cell;<a name="line.215"></a> |
| <span class="sourceLineNo">216</span> }<a name="line.216"></a> |
| <span class="sourceLineNo">217</span><a name="line.217"></a> |
| <span class="sourceLineNo">218</span> @Override<a name="line.218"></a> |
| <span class="sourceLineNo">219</span> public void upsert(Iterable<Cell> cells, long readpoint, MemStoreSizing memstoreSizing) {<a name="line.219"></a> |
| <span class="sourceLineNo">220</span> for (Cell cell : cells) {<a name="line.220"></a> |
| <span class="sourceLineNo">221</span> upsert(cell, readpoint, memstoreSizing);<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> * @return Oldest timestamp of all the Cells in the MemStore<a name="line.226"></a> |
| <span class="sourceLineNo">227</span> */<a name="line.227"></a> |
| <span class="sourceLineNo">228</span> @Override<a name="line.228"></a> |
| <span class="sourceLineNo">229</span> public long timeOfOldestEdit() {<a name="line.229"></a> |
| <span class="sourceLineNo">230</span> return timeOfOldestEdit;<a name="line.230"></a> |
| <span class="sourceLineNo">231</span> }<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> * The passed snapshot was successfully persisted; it can be let go.<a name="line.234"></a> |
| <span class="sourceLineNo">235</span> * @param id Id of the snapshot to clean out.<a name="line.235"></a> |
| <span class="sourceLineNo">236</span> * @see MemStore#snapshot()<a name="line.236"></a> |
| <span class="sourceLineNo">237</span> */<a name="line.237"></a> |
| <span class="sourceLineNo">238</span> @Override<a name="line.238"></a> |
| <span class="sourceLineNo">239</span> public void clearSnapshot(long id) throws UnexpectedStateException {<a name="line.239"></a> |
| <span class="sourceLineNo">240</span> if (this.snapshotId == -1) return; // already cleared<a name="line.240"></a> |
| <span class="sourceLineNo">241</span> if (this.snapshotId != id) {<a name="line.241"></a> |
| <span class="sourceLineNo">242</span> throw new UnexpectedStateException("Current snapshot id is " + this.snapshotId + ",passed "<a name="line.242"></a> |
| <span class="sourceLineNo">243</span> + id);<a name="line.243"></a> |
| <span class="sourceLineNo">244</span> }<a name="line.244"></a> |
| <span class="sourceLineNo">245</span> // OK. Passed in snapshot is same as current snapshot. If not-empty,<a name="line.245"></a> |
| <span class="sourceLineNo">246</span> // create a new snapshot and let the old one go.<a name="line.246"></a> |
| <span class="sourceLineNo">247</span> Segment oldSnapshot = this.snapshot;<a name="line.247"></a> |
| <span class="sourceLineNo">248</span> if (!this.snapshot.isEmpty()) {<a name="line.248"></a> |
| <span class="sourceLineNo">249</span> this.snapshot = SegmentFactory.instance().createImmutableSegment(this.comparator);<a name="line.249"></a> |
| <span class="sourceLineNo">250</span> }<a name="line.250"></a> |
| <span class="sourceLineNo">251</span> this.snapshotId = NO_SNAPSHOT_ID;<a name="line.251"></a> |
| <span class="sourceLineNo">252</span> oldSnapshot.close();<a name="line.252"></a> |
| <span class="sourceLineNo">253</span> }<a name="line.253"></a> |
| <span class="sourceLineNo">254</span><a name="line.254"></a> |
| <span class="sourceLineNo">255</span> @Override<a name="line.255"></a> |
| <span class="sourceLineNo">256</span> public MemStoreSize getSnapshotSize() {<a name="line.256"></a> |
| <span class="sourceLineNo">257</span> return this.snapshot.getMemStoreSize();<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> @Override<a name="line.260"></a> |
| <span class="sourceLineNo">261</span> public String toString() {<a name="line.261"></a> |
| <span class="sourceLineNo">262</span> StringBuilder buf = new StringBuilder();<a name="line.262"></a> |
| <span class="sourceLineNo">263</span> int i = 1;<a name="line.263"></a> |
| <span class="sourceLineNo">264</span> try {<a name="line.264"></a> |
| <span class="sourceLineNo">265</span> for (Segment segment : getSegments()) {<a name="line.265"></a> |
| <span class="sourceLineNo">266</span> buf.append("Segment (").append(i).append(") ").append(segment.toString()).append("; ");<a name="line.266"></a> |
| <span class="sourceLineNo">267</span> i++;<a name="line.267"></a> |
| <span class="sourceLineNo">268</span> }<a name="line.268"></a> |
| <span class="sourceLineNo">269</span> } catch (IOException e){<a name="line.269"></a> |
| <span class="sourceLineNo">270</span> return e.toString();<a name="line.270"></a> |
| <span class="sourceLineNo">271</span> }<a name="line.271"></a> |
| <span class="sourceLineNo">272</span> return buf.toString();<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> protected Configuration getConfiguration() {<a name="line.275"></a> |
| <span class="sourceLineNo">276</span> return conf;<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> protected void dump(Logger log) {<a name="line.279"></a> |
| <span class="sourceLineNo">280</span> getActive().dump(log);<a name="line.280"></a> |
| <span class="sourceLineNo">281</span> snapshot.dump(log);<a name="line.281"></a> |
| <span class="sourceLineNo">282</span> }<a name="line.282"></a> |
| <span class="sourceLineNo">283</span><a name="line.283"></a> |
| <span class="sourceLineNo">284</span><a name="line.284"></a> |
| <span class="sourceLineNo">285</span> /*<a name="line.285"></a> |
| <span class="sourceLineNo">286</span> * @param a<a name="line.286"></a> |
| <span class="sourceLineNo">287</span> * @param b<a name="line.287"></a> |
| <span class="sourceLineNo">288</span> * @return Return lowest of a or b or null if both a and b are null<a name="line.288"></a> |
| <span class="sourceLineNo">289</span> */<a name="line.289"></a> |
| <span class="sourceLineNo">290</span> protected Cell getLowest(final Cell a, final Cell b) {<a name="line.290"></a> |
| <span class="sourceLineNo">291</span> if (a == null) {<a name="line.291"></a> |
| <span class="sourceLineNo">292</span> return b;<a name="line.292"></a> |
| <span class="sourceLineNo">293</span> }<a name="line.293"></a> |
| <span class="sourceLineNo">294</span> if (b == null) {<a name="line.294"></a> |
| <span class="sourceLineNo">295</span> return a;<a name="line.295"></a> |
| <span class="sourceLineNo">296</span> }<a name="line.296"></a> |
| <span class="sourceLineNo">297</span> return comparator.compareRows(a, b) <= 0? a: b;<a name="line.297"></a> |
| <span class="sourceLineNo">298</span> }<a name="line.298"></a> |
| <span class="sourceLineNo">299</span><a name="line.299"></a> |
| <span class="sourceLineNo">300</span> /*<a name="line.300"></a> |
| <span class="sourceLineNo">301</span> * @param key Find row that follows this one. If null, return first.<a name="line.301"></a> |
| <span class="sourceLineNo">302</span> * @param set Set to look in for a row beyond <code>row</code>.<a name="line.302"></a> |
| <span class="sourceLineNo">303</span> * @return Next row or null if none found. If one found, will be a new<a name="line.303"></a> |
| <span class="sourceLineNo">304</span> * KeyValue -- can be destroyed by subsequent calls to this method.<a name="line.304"></a> |
| <span class="sourceLineNo">305</span> */<a name="line.305"></a> |
| <span class="sourceLineNo">306</span> protected Cell getNextRow(final Cell key,<a name="line.306"></a> |
| <span class="sourceLineNo">307</span> final NavigableSet<Cell> set) {<a name="line.307"></a> |
| <span class="sourceLineNo">308</span> Cell result = null;<a name="line.308"></a> |
| <span class="sourceLineNo">309</span> SortedSet<Cell> tail = key == null? set: set.tailSet(key);<a name="line.309"></a> |
| <span class="sourceLineNo">310</span> // Iterate until we fall into the next row; i.e. move off current row<a name="line.310"></a> |
| <span class="sourceLineNo">311</span> for (Cell cell: tail) {<a name="line.311"></a> |
| <span class="sourceLineNo">312</span> if (comparator.compareRows(cell, key) <= 0) {<a name="line.312"></a> |
| <span class="sourceLineNo">313</span> continue;<a name="line.313"></a> |
| <span class="sourceLineNo">314</span> }<a name="line.314"></a> |
| <span class="sourceLineNo">315</span> // Note: Not suppressing deletes or expired cells. Needs to be handled<a name="line.315"></a> |
| <span class="sourceLineNo">316</span> // by higher up functions.<a name="line.316"></a> |
| <span class="sourceLineNo">317</span> result = cell;<a name="line.317"></a> |
| <span class="sourceLineNo">318</span> break;<a name="line.318"></a> |
| <span class="sourceLineNo">319</span> }<a name="line.319"></a> |
| <span class="sourceLineNo">320</span> return result;<a name="line.320"></a> |
| <span class="sourceLineNo">321</span> }<a name="line.321"></a> |
| <span class="sourceLineNo">322</span><a name="line.322"></a> |
| <span class="sourceLineNo">323</span> /**<a name="line.323"></a> |
| <span class="sourceLineNo">324</span> * If the segment has a memory allocator the cell is being cloned to this space, and returned;<a name="line.324"></a> |
| <span class="sourceLineNo">325</span> * Otherwise the given cell is returned<a name="line.325"></a> |
| <span class="sourceLineNo">326</span> *<a name="line.326"></a> |
| <span class="sourceLineNo">327</span> * When a cell's size is too big (bigger than maxAlloc), it is not allocated on MSLAB.<a name="line.327"></a> |
| <span class="sourceLineNo">328</span> * Since the process of flattening to CellChunkMap assumes that all cells are allocated on MSLAB,<a name="line.328"></a> |
| <span class="sourceLineNo">329</span> * during this process, the input parameter forceCloneOfBigCell is set to 'true'<a name="line.329"></a> |
| <span class="sourceLineNo">330</span> * and the cell is copied into MSLAB.<a name="line.330"></a> |
| <span class="sourceLineNo">331</span> *<a name="line.331"></a> |
| <span class="sourceLineNo">332</span> * @param cell the cell to clone<a name="line.332"></a> |
| <span class="sourceLineNo">333</span> * @param forceCloneOfBigCell true only during the process of flattening to CellChunkMap.<a name="line.333"></a> |
| <span class="sourceLineNo">334</span> * @return either the given cell or its clone<a name="line.334"></a> |
| <span class="sourceLineNo">335</span> */<a name="line.335"></a> |
| <span class="sourceLineNo">336</span> private Cell maybeCloneWithAllocator(MutableSegment currentActive, Cell cell, boolean<a name="line.336"></a> |
| <span class="sourceLineNo">337</span> forceCloneOfBigCell) {<a name="line.337"></a> |
| <span class="sourceLineNo">338</span> return currentActive.maybeCloneWithAllocator(cell, forceCloneOfBigCell);<a name="line.338"></a> |
| <span class="sourceLineNo">339</span> }<a name="line.339"></a> |
| <span class="sourceLineNo">340</span><a name="line.340"></a> |
| <span class="sourceLineNo">341</span> /*<a name="line.341"></a> |
| <span class="sourceLineNo">342</span> * Internal version of add() that doesn't clone Cells with the<a name="line.342"></a> |
| <span class="sourceLineNo">343</span> * allocator, and doesn't take the lock.<a name="line.343"></a> |
| <span class="sourceLineNo">344</span> *<a name="line.344"></a> |
| <span class="sourceLineNo">345</span> * Callers should ensure they already have the read lock taken<a name="line.345"></a> |
| <span class="sourceLineNo">346</span> * @param toAdd the cell to add<a name="line.346"></a> |
| <span class="sourceLineNo">347</span> * @param mslabUsed whether using MSLAB<a name="line.347"></a> |
| <span class="sourceLineNo">348</span> * @param memstoreSizing object to accumulate changed size<a name="line.348"></a> |
| <span class="sourceLineNo">349</span> */<a name="line.349"></a> |
| <span class="sourceLineNo">350</span> private void internalAdd(MutableSegment currentActive, final Cell toAdd, final boolean<a name="line.350"></a> |
| <span class="sourceLineNo">351</span> mslabUsed, MemStoreSizing memstoreSizing) {<a name="line.351"></a> |
| <span class="sourceLineNo">352</span> boolean sizeAddedPreOperation = sizeAddedPreOperation();<a name="line.352"></a> |
| <span class="sourceLineNo">353</span> currentActive.add(toAdd, mslabUsed, memstoreSizing, sizeAddedPreOperation);<a name="line.353"></a> |
| <span class="sourceLineNo">354</span> setOldestEditTimeToNow();<a name="line.354"></a> |
| <span class="sourceLineNo">355</span> }<a name="line.355"></a> |
| <span class="sourceLineNo">356</span><a name="line.356"></a> |
| <span class="sourceLineNo">357</span> protected abstract boolean sizeAddedPreOperation();<a name="line.357"></a> |
| <span class="sourceLineNo">358</span><a name="line.358"></a> |
| <span class="sourceLineNo">359</span> private void setOldestEditTimeToNow() {<a name="line.359"></a> |
| <span class="sourceLineNo">360</span> if (timeOfOldestEdit == Long.MAX_VALUE) {<a name="line.360"></a> |
| <span class="sourceLineNo">361</span> timeOfOldestEdit = EnvironmentEdgeManager.currentTime();<a name="line.361"></a> |
| <span class="sourceLineNo">362</span> }<a name="line.362"></a> |
| <span class="sourceLineNo">363</span> }<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> * @return The total size of cells in this memstore. We will not consider cells in the snapshot<a name="line.366"></a> |
| <span class="sourceLineNo">367</span> */<a name="line.367"></a> |
| <span class="sourceLineNo">368</span> protected abstract long keySize();<a name="line.368"></a> |
| <span class="sourceLineNo">369</span><a name="line.369"></a> |
| <span class="sourceLineNo">370</span> /**<a name="line.370"></a> |
| <span class="sourceLineNo">371</span> * @return The total heap size of cells in this memstore. We will not consider cells in the<a name="line.371"></a> |
| <span class="sourceLineNo">372</span> * snapshot<a name="line.372"></a> |
| <span class="sourceLineNo">373</span> */<a name="line.373"></a> |
| <span class="sourceLineNo">374</span> protected abstract long heapSize();<a name="line.374"></a> |
| <span class="sourceLineNo">375</span><a name="line.375"></a> |
| <span class="sourceLineNo">376</span> protected CellComparator getComparator() {<a name="line.376"></a> |
| <span class="sourceLineNo">377</span> return comparator;<a name="line.377"></a> |
| <span class="sourceLineNo">378</span> }<a name="line.378"></a> |
| <span class="sourceLineNo">379</span><a name="line.379"></a> |
| <span class="sourceLineNo">380</span> @VisibleForTesting<a name="line.380"></a> |
| <span class="sourceLineNo">381</span> MutableSegment getActive() {<a name="line.381"></a> |
| <span class="sourceLineNo">382</span> return active;<a name="line.382"></a> |
| <span class="sourceLineNo">383</span> }<a name="line.383"></a> |
| <span class="sourceLineNo">384</span><a name="line.384"></a> |
| <span class="sourceLineNo">385</span> @VisibleForTesting<a name="line.385"></a> |
| <span class="sourceLineNo">386</span> ImmutableSegment getSnapshot() {<a name="line.386"></a> |
| <span class="sourceLineNo">387</span> return snapshot;<a name="line.387"></a> |
| <span class="sourceLineNo">388</span> }<a name="line.388"></a> |
| <span class="sourceLineNo">389</span><a name="line.389"></a> |
| <span class="sourceLineNo">390</span> /**<a name="line.390"></a> |
| <span class="sourceLineNo">391</span> * @return an ordered list of segments from most recent to oldest in memstore<a name="line.391"></a> |
| <span class="sourceLineNo">392</span> */<a name="line.392"></a> |
| <span class="sourceLineNo">393</span> protected abstract List<Segment> getSegments() throws IOException;<a name="line.393"></a> |
| <span class="sourceLineNo">394</span><a name="line.394"></a> |
| <span class="sourceLineNo">395</span>}<a name="line.395"></a> |
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| </pre> |
| </div> |
| </body> |
| </html> |
