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HADOOP-18959 Use builder for prefetch CachingBlockManager
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...ct/hadoop-common/src/main/java/org/apache/hadoop/fs/impl/prefetch/BlockManagerParams.java
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| /* | ||
| * Licensed to the Apache Software Foundation (ASF) under one | ||
| * or more contributor license agreements. See the NOTICE file | ||
| * distributed with this work for additional information | ||
| * regarding copyright ownership. The ASF licenses this file | ||
| * to you under the Apache License, Version 2.0 (the | ||
| * "License"); you may not use this file except in compliance | ||
| * with the License. You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, | ||
| * software distributed under the License is distributed on an | ||
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY | ||
| * KIND, either express or implied. See the License for the | ||
| * specific language governing permissions and limitations | ||
| * under the License. | ||
| */ | ||
|
|
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| package org.apache.hadoop.fs.impl.prefetch; | ||
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| import org.apache.hadoop.classification.InterfaceAudience; | ||
| import org.apache.hadoop.conf.Configuration; | ||
| import org.apache.hadoop.fs.LocalDirAllocator; | ||
| import org.apache.hadoop.fs.statistics.DurationTrackerFactory; | ||
|
|
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| /** | ||
| * This class is used to provide params to {@link BlockManager}. | ||
| */ | ||
| @InterfaceAudience.Private | ||
| public class BlockManagerParams { | ||
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| /** | ||
| * Asynchronous tasks are performed in this pool. | ||
| */ | ||
| private final ExecutorServiceFuturePool futurePool; | ||
| /** | ||
| * Information about each block of the underlying file. | ||
| */ | ||
| private final BlockData blockData; | ||
| /** | ||
| * Size of the in-memory cache in terms of number of blocks. | ||
| */ | ||
| private final int bufferPoolSize; | ||
| /** | ||
| * Statistics for the stream. | ||
| */ | ||
| private final PrefetchingStatistics prefetchingStatistics; | ||
| /** | ||
| * The configuration object. | ||
| */ | ||
| private final Configuration conf; | ||
| /** | ||
| * The local dir allocator instance. | ||
| */ | ||
| private final LocalDirAllocator localDirAllocator; | ||
| /** | ||
| * Max blocks count to be kept in cache at any time. | ||
| */ | ||
| private final int maxBlocksCount; | ||
| /** | ||
| * Tracker with statistics to update. | ||
| */ | ||
| private final DurationTrackerFactory trackerFactory; | ||
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| private BlockManagerParams(ExecutorServiceFuturePool futurePool, BlockData blockData, | ||
| int bufferPoolSize, PrefetchingStatistics prefetchingStatistics, Configuration conf, | ||
| LocalDirAllocator localDirAllocator, int maxBlocksCount, | ||
| DurationTrackerFactory trackerFactory) { | ||
| this.futurePool = futurePool; | ||
| this.blockData = blockData; | ||
| this.bufferPoolSize = bufferPoolSize; | ||
| this.prefetchingStatistics = prefetchingStatistics; | ||
| this.conf = conf; | ||
| this.localDirAllocator = localDirAllocator; | ||
| this.maxBlocksCount = maxBlocksCount; | ||
| this.trackerFactory = trackerFactory; | ||
| } | ||
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| public ExecutorServiceFuturePool getFuturePool() { | ||
| return futurePool; | ||
| } | ||
|
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| public BlockData getBlockData() { | ||
| return blockData; | ||
| } | ||
|
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| public int getBufferPoolSize() { | ||
| return bufferPoolSize; | ||
| } | ||
|
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| public PrefetchingStatistics getPrefetchingStatistics() { | ||
| return prefetchingStatistics; | ||
| } | ||
|
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| public Configuration getConf() { | ||
| return conf; | ||
| } | ||
|
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| public LocalDirAllocator getLocalDirAllocator() { | ||
| return localDirAllocator; | ||
| } | ||
|
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| public int getMaxBlocksCount() { | ||
| return maxBlocksCount; | ||
| } | ||
|
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| public DurationTrackerFactory getTrackerFactory() { | ||
| return trackerFactory; | ||
| } | ||
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| public static class BlockManagerParamsBuilder { | ||
| private ExecutorServiceFuturePool futurePool; | ||
| private BlockData blockData; | ||
| private int bufferPoolSize; | ||
| private PrefetchingStatistics prefetchingStatistics; | ||
| private Configuration conf; | ||
| private LocalDirAllocator localDirAllocator; | ||
| private int maxBlocksCount; | ||
| private DurationTrackerFactory trackerFactory; | ||
|
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| public BlockManagerParamsBuilder setFuturePool(ExecutorServiceFuturePool futurePool) { | ||
| this.futurePool = futurePool; | ||
| return this; | ||
| } | ||
|
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| public BlockManagerParamsBuilder setBlockData(BlockData blockData) { | ||
| this.blockData = blockData; | ||
| return this; | ||
| } | ||
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| public BlockManagerParamsBuilder setBufferPoolSize(int bufferPoolSize) { | ||
| this.bufferPoolSize = bufferPoolSize; | ||
| return this; | ||
| } | ||
|
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| public BlockManagerParamsBuilder setPrefetchingStatistics( | ||
| PrefetchingStatistics prefetchingStatistics) { | ||
| this.prefetchingStatistics = prefetchingStatistics; | ||
| return this; | ||
| } | ||
|
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| public BlockManagerParamsBuilder setConf(Configuration conf) { | ||
| this.conf = conf; | ||
| return this; | ||
| } | ||
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| public BlockManagerParamsBuilder setLocalDirAllocator(LocalDirAllocator localDirAllocator) { | ||
| this.localDirAllocator = localDirAllocator; | ||
| return this; | ||
| } | ||
|
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| public BlockManagerParamsBuilder setMaxBlocksCount(int maxBlocksCount) { | ||
| this.maxBlocksCount = maxBlocksCount; | ||
| return this; | ||
| } | ||
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| public BlockManagerParamsBuilder setTrackerFactory(DurationTrackerFactory trackerFactory) { | ||
| this.trackerFactory = trackerFactory; | ||
| return this; | ||
| } | ||
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| public BlockManagerParams build() { | ||
| return new BlockManagerParams(futurePool, blockData, bufferPoolSize, prefetchingStatistics, | ||
| conf, localDirAllocator, maxBlocksCount, trackerFactory); | ||
| } | ||
| } | ||
| } |
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