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| <pre><span class="source-line-no">001</span><span id="line-1">/*</span> |
| <span class="source-line-no">002</span><span id="line-2"> * Licensed to the Apache Software Foundation (ASF) under one</span> |
| <span class="source-line-no">003</span><span id="line-3"> * or more contributor license agreements. See the NOTICE file</span> |
| <span class="source-line-no">004</span><span id="line-4"> * distributed with this work for additional information</span> |
| <span class="source-line-no">005</span><span id="line-5"> * regarding copyright ownership. The ASF licenses this file</span> |
| <span class="source-line-no">006</span><span id="line-6"> * to you under the Apache License, Version 2.0 (the</span> |
| <span class="source-line-no">007</span><span id="line-7"> * "License"); you may not use this file except in compliance</span> |
| <span class="source-line-no">008</span><span id="line-8"> * with the License. You may obtain a copy of the License at</span> |
| <span class="source-line-no">009</span><span id="line-9"> *</span> |
| <span class="source-line-no">010</span><span id="line-10"> * http://www.apache.org/licenses/LICENSE-2.0</span> |
| <span class="source-line-no">011</span><span id="line-11"> *</span> |
| <span class="source-line-no">012</span><span id="line-12"> * Unless required by applicable law or agreed to in writing, software</span> |
| <span class="source-line-no">013</span><span id="line-13"> * distributed under the License is distributed on an "AS IS" BASIS,</span> |
| <span class="source-line-no">014</span><span id="line-14"> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span> |
| <span class="source-line-no">015</span><span id="line-15"> * See the License for the specific language governing permissions and</span> |
| <span class="source-line-no">016</span><span id="line-16"> * limitations under the License.</span> |
| <span class="source-line-no">017</span><span id="line-17"> */</span> |
| <span class="source-line-no">018</span><span id="line-18">package org.apache.hadoop.hbase.regionserver;</span> |
| <span class="source-line-no">019</span><span id="line-19"></span> |
| <span class="source-line-no">020</span><span id="line-20">import java.util.Collections;</span> |
| <span class="source-line-no">021</span><span id="line-21">import java.util.List;</span> |
| <span class="source-line-no">022</span><span id="line-22">import org.apache.hadoop.hbase.CellComparator;</span> |
| <span class="source-line-no">023</span><span id="line-23">import org.apache.hadoop.hbase.util.ClassSize;</span> |
| <span class="source-line-no">024</span><span id="line-24">import org.apache.yetus.audience.InterfaceAudience;</span> |
| <span class="source-line-no">025</span><span id="line-25"></span> |
| <span class="source-line-no">026</span><span id="line-26">/**</span> |
| <span class="source-line-no">027</span><span id="line-27"> * ImmutableSegment is an abstract class that extends the API supported by a {@link Segment}, and is</span> |
| <span class="source-line-no">028</span><span id="line-28"> * not needed for a {@link MutableSegment}.</span> |
| <span class="source-line-no">029</span><span id="line-29"> */</span> |
| <span class="source-line-no">030</span><span id="line-30">@InterfaceAudience.Private</span> |
| <span class="source-line-no">031</span><span id="line-31">public abstract class ImmutableSegment extends Segment {</span> |
| <span class="source-line-no">032</span><span id="line-32"></span> |
| <span class="source-line-no">033</span><span id="line-33"> public static final long DEEP_OVERHEAD =</span> |
| <span class="source-line-no">034</span><span id="line-34"> Segment.DEEP_OVERHEAD + ClassSize.NON_SYNC_TIMERANGE_TRACKER;</span> |
| <span class="source-line-no">035</span><span id="line-35"></span> |
| <span class="source-line-no">036</span><span id="line-36"> // each sub-type of immutable segment knows whether it is flat or not</span> |
| <span class="source-line-no">037</span><span id="line-37"> protected abstract boolean canBeFlattened();</span> |
| <span class="source-line-no">038</span><span id="line-38"></span> |
| <span class="source-line-no">039</span><span id="line-39"> public int getNumUniqueKeys() {</span> |
| <span class="source-line-no">040</span><span id="line-40"> return getCellSet().getNumUniqueKeys();</span> |
| <span class="source-line-no">041</span><span id="line-41"> }</span> |
| <span class="source-line-no">042</span><span id="line-42"></span> |
| <span class="source-line-no">043</span><span id="line-43"> ///////////////////// CONSTRUCTORS /////////////////////</span> |
| <span class="source-line-no">044</span><span id="line-44"> /**</span> |
| <span class="source-line-no">045</span><span id="line-45"> * ------------------------------------------------------------------------ Empty C-tor to be used</span> |
| <span class="source-line-no">046</span><span id="line-46"> * only for CompositeImmutableSegment</span> |
| <span class="source-line-no">047</span><span id="line-47"> */</span> |
| <span class="source-line-no">048</span><span id="line-48"> protected ImmutableSegment(CellComparator comparator) {</span> |
| <span class="source-line-no">049</span><span id="line-49"> super(comparator, TimeRangeTracker.create(TimeRangeTracker.Type.NON_SYNC));</span> |
| <span class="source-line-no">050</span><span id="line-50"> }</span> |
| <span class="source-line-no">051</span><span id="line-51"></span> |
| <span class="source-line-no">052</span><span id="line-52"> protected ImmutableSegment(CellComparator comparator, List<ImmutableSegment> segments) {</span> |
| <span class="source-line-no">053</span><span id="line-53"> super(comparator, segments, TimeRangeTracker.create(TimeRangeTracker.Type.NON_SYNC));</span> |
| <span class="source-line-no">054</span><span id="line-54"> }</span> |
| <span class="source-line-no">055</span><span id="line-55"></span> |
| <span class="source-line-no">056</span><span id="line-56"> /**</span> |
| <span class="source-line-no">057</span><span id="line-57"> * ------------------------------------------------------------------------ C-tor to be used to</span> |
| <span class="source-line-no">058</span><span id="line-58"> * build the derived classes</span> |
| <span class="source-line-no">059</span><span id="line-59"> */</span> |
| <span class="source-line-no">060</span><span id="line-60"> protected ImmutableSegment(CellSet cs, CellComparator comparator, MemStoreLAB memStoreLAB) {</span> |
| <span class="source-line-no">061</span><span id="line-61"> super(cs, comparator, memStoreLAB, TimeRangeTracker.create(TimeRangeTracker.Type.NON_SYNC));</span> |
| <span class="source-line-no">062</span><span id="line-62"> }</span> |
| <span class="source-line-no">063</span><span id="line-63"></span> |
| <span class="source-line-no">064</span><span id="line-64"> /**</span> |
| <span class="source-line-no">065</span><span id="line-65"> * ------------------------------------------------------------------------ Copy C-tor to be used</span> |
| <span class="source-line-no">066</span><span id="line-66"> * when new CSLMImmutableSegment (derived) is being built from a Mutable one. This C-tor should be</span> |
| <span class="source-line-no">067</span><span id="line-67"> * used when active MutableSegment is pushed into the compaction pipeline and becomes an</span> |
| <span class="source-line-no">068</span><span id="line-68"> * ImmutableSegment.</span> |
| <span class="source-line-no">069</span><span id="line-69"> */</span> |
| <span class="source-line-no">070</span><span id="line-70"> protected ImmutableSegment(Segment segment) {</span> |
| <span class="source-line-no">071</span><span id="line-71"> super(segment);</span> |
| <span class="source-line-no">072</span><span id="line-72"> }</span> |
| <span class="source-line-no">073</span><span id="line-73"></span> |
| <span class="source-line-no">074</span><span id="line-74"> ///////////////////// PUBLIC METHODS /////////////////////</span> |
| <span class="source-line-no">075</span><span id="line-75"></span> |
| <span class="source-line-no">076</span><span id="line-76"> public int getNumOfSegments() {</span> |
| <span class="source-line-no">077</span><span id="line-77"> return 1;</span> |
| <span class="source-line-no">078</span><span id="line-78"> }</span> |
| <span class="source-line-no">079</span><span id="line-79"></span> |
| <span class="source-line-no">080</span><span id="line-80"> public List<Segment> getAllSegments() {</span> |
| <span class="source-line-no">081</span><span id="line-81"> return Collections.singletonList(this);</span> |
| <span class="source-line-no">082</span><span id="line-82"> }</span> |
| <span class="source-line-no">083</span><span id="line-83"></span> |
| <span class="source-line-no">084</span><span id="line-84"> @Override</span> |
| <span class="source-line-no">085</span><span id="line-85"> public String toString() {</span> |
| <span class="source-line-no">086</span><span id="line-86"> String res = super.toString();</span> |
| <span class="source-line-no">087</span><span id="line-87"> res += "Num uniques " + getNumUniqueKeys() + "; ";</span> |
| <span class="source-line-no">088</span><span id="line-88"> return res;</span> |
| <span class="source-line-no">089</span><span id="line-89"> }</span> |
| <span class="source-line-no">090</span><span id="line-90"></span> |
| <span class="source-line-no">091</span><span id="line-91"> /**</span> |
| <span class="source-line-no">092</span><span id="line-92"> * We create a new {@link SnapshotSegmentScanner} to increase the reference count of</span> |
| <span class="source-line-no">093</span><span id="line-93"> * {@link MemStoreLABImpl} used by this segment.</span> |
| <span class="source-line-no">094</span><span id="line-94"> */</span> |
| <span class="source-line-no">095</span><span id="line-95"> List<KeyValueScanner> getSnapshotScanners() {</span> |
| <span class="source-line-no">096</span><span id="line-96"> return Collections.singletonList(new SnapshotSegmentScanner(this));</span> |
| <span class="source-line-no">097</span><span id="line-97"> }</span> |
| <span class="source-line-no">098</span><span id="line-98">}</span> |
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| </pre> |
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