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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.io.hfile;</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 org.apache.yetus.audience.InterfaceAudience;</span> |
| <span class="source-line-no">021</span><span id="line-21"></span> |
| <span class="source-line-no">022</span><span id="line-22">@InterfaceAudience.Private</span> |
| <span class="source-line-no">023</span><span id="line-23">public class InclusiveCombinedBlockCache extends CombinedBlockCache {</span> |
| <span class="source-line-no">024</span><span id="line-24"> public InclusiveCombinedBlockCache(FirstLevelBlockCache l1, BlockCache l2) {</span> |
| <span class="source-line-no">025</span><span id="line-25"> super(l1, l2);</span> |
| <span class="source-line-no">026</span><span id="line-26"> l1.setVictimCache(l2);</span> |
| <span class="source-line-no">027</span><span id="line-27"> }</span> |
| <span class="source-line-no">028</span><span id="line-28"></span> |
| <span class="source-line-no">029</span><span id="line-29"> @Override</span> |
| <span class="source-line-no">030</span><span id="line-30"> public Cacheable getBlock(BlockCacheKey cacheKey, boolean caching, boolean repeat,</span> |
| <span class="source-line-no">031</span><span id="line-31"> boolean updateCacheMetrics) {</span> |
| <span class="source-line-no">032</span><span id="line-32"> // On all external cache set ups the lru should have the l2 cache set as the victimHandler</span> |
| <span class="source-line-no">033</span><span id="line-33"> // Because of that all requests that miss inside of the lru block cache will be</span> |
| <span class="source-line-no">034</span><span id="line-34"> // tried in the l2 block cache.</span> |
| <span class="source-line-no">035</span><span id="line-35"> return l1Cache.getBlock(cacheKey, caching, repeat, updateCacheMetrics);</span> |
| <span class="source-line-no">036</span><span id="line-36"> }</span> |
| <span class="source-line-no">037</span><span id="line-37"></span> |
| <span class="source-line-no">038</span><span id="line-38"> /**</span> |
| <span class="source-line-no">039</span><span id="line-39"> * @param cacheKey The block's cache key.</span> |
| <span class="source-line-no">040</span><span id="line-40"> * @param buf The block contents wrapped in a ByteBuffer.</span> |
| <span class="source-line-no">041</span><span id="line-41"> * @param inMemory Whether block should be treated as in-memory. This parameter is only useful for</span> |
| <span class="source-line-no">042</span><span id="line-42"> * the L1 lru cache.</span> |
| <span class="source-line-no">043</span><span id="line-43"> */</span> |
| <span class="source-line-no">044</span><span id="line-44"> @Override</span> |
| <span class="source-line-no">045</span><span id="line-45"> public void cacheBlock(BlockCacheKey cacheKey, Cacheable buf, boolean inMemory) {</span> |
| <span class="source-line-no">046</span><span id="line-46"> // This is the inclusive part of the combined block cache.</span> |
| <span class="source-line-no">047</span><span id="line-47"> // Every block is placed into both block caches.</span> |
| <span class="source-line-no">048</span><span id="line-48"> l1Cache.cacheBlock(cacheKey, buf, inMemory);</span> |
| <span class="source-line-no">049</span><span id="line-49"></span> |
| <span class="source-line-no">050</span><span id="line-50"> // This assumes that insertion into the L2 block cache is either async or very fast.</span> |
| <span class="source-line-no">051</span><span id="line-51"> l2Cache.cacheBlock(cacheKey, buf, inMemory);</span> |
| <span class="source-line-no">052</span><span id="line-52"> }</span> |
| <span class="source-line-no">053</span><span id="line-53"></span> |
| <span class="source-line-no">054</span><span id="line-54"> @Override</span> |
| <span class="source-line-no">055</span><span id="line-55"> public boolean evictBlock(BlockCacheKey cacheKey) {</span> |
| <span class="source-line-no">056</span><span id="line-56"> boolean l1Result = this.l1Cache.evictBlock(cacheKey);</span> |
| <span class="source-line-no">057</span><span id="line-57"> boolean l2Result = this.l2Cache.evictBlock(cacheKey);</span> |
| <span class="source-line-no">058</span><span id="line-58"> return l1Result || l2Result;</span> |
| <span class="source-line-no">059</span><span id="line-59"> }</span> |
| <span class="source-line-no">060</span><span id="line-60">}</span> |
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| </pre> |
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