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| 1 | +/* |
| 2 | + * Licensed to Elasticsearch under one or more contributor |
| 3 | + * license agreements. See the NOTICE file distributed with |
| 4 | + * this work for additional information regarding copyright |
| 5 | + * ownership. Elasticsearch licenses this file to you under |
| 6 | + * the Apache License, Version 2.0 (the "License"); you may |
| 7 | + * not use this file except in compliance with the License. |
| 8 | + * You may obtain a copy of the License at |
| 9 | + * |
| 10 | + * http://www.apache.org/licenses/LICENSE-2.0 |
| 11 | + * |
| 12 | + * Unless required by applicable law or agreed to in writing, |
| 13 | + * software distributed under the License is distributed on an |
| 14 | + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| 15 | + * KIND, either express or implied. See the License for the |
| 16 | + * specific language governing permissions and limitations |
| 17 | + * under the License. |
| 18 | + */ |
| 19 | + |
| 20 | +package org.elasticsearch.transport; |
| 21 | + |
| 22 | +import io.netty.buffer.ByteBuf; |
| 23 | +import io.netty.buffer.ByteBufAllocator; |
| 24 | +import io.netty.buffer.CompositeByteBuf; |
| 25 | +import io.netty.buffer.PooledByteBufAllocator; |
| 26 | +import io.netty.buffer.UnpooledByteBufAllocator; |
| 27 | +import io.netty.channel.Channel; |
| 28 | +import io.netty.channel.ServerChannel; |
| 29 | +import io.netty.channel.socket.nio.NioServerSocketChannel; |
| 30 | +import io.netty.channel.socket.nio.NioSocketChannel; |
| 31 | +import org.elasticsearch.common.Booleans; |
| 32 | +import org.elasticsearch.monitor.jvm.JvmInfo; |
| 33 | + |
| 34 | +public class NettyAllocator { |
| 35 | + |
| 36 | + private static final ByteBufAllocator ALLOCATOR; |
| 37 | + |
| 38 | + private static final String USE_UNPOOLED = "es.use_unpooled_allocator"; |
| 39 | + private static final String USE_NETTY_DEFAULT = "es.unsafe.use_netty_default_allocator"; |
| 40 | + |
| 41 | + static { |
| 42 | + if (Booleans.parseBoolean(System.getProperty(USE_NETTY_DEFAULT), false)) { |
| 43 | + ALLOCATOR = ByteBufAllocator.DEFAULT; |
| 44 | + } else { |
| 45 | + ByteBufAllocator delegate; |
| 46 | + if (useUnpooled()) { |
| 47 | + delegate = new NoDirectBuffers(UnpooledByteBufAllocator.DEFAULT); |
| 48 | + } else { |
| 49 | + int nHeapArena = PooledByteBufAllocator.defaultNumHeapArena(); |
| 50 | + int pageSize = PooledByteBufAllocator.defaultPageSize(); |
| 51 | + int maxOrder = PooledByteBufAllocator.defaultMaxOrder(); |
| 52 | + int tinyCacheSize = PooledByteBufAllocator.defaultTinyCacheSize(); |
| 53 | + int smallCacheSize = PooledByteBufAllocator.defaultSmallCacheSize(); |
| 54 | + int normalCacheSize = PooledByteBufAllocator.defaultNormalCacheSize(); |
| 55 | + boolean useCacheForAllThreads = PooledByteBufAllocator.defaultUseCacheForAllThreads(); |
| 56 | + delegate = new PooledByteBufAllocator(false, nHeapArena, 0, pageSize, maxOrder, tinyCacheSize, |
| 57 | + smallCacheSize, normalCacheSize, useCacheForAllThreads); |
| 58 | + } |
| 59 | + ALLOCATOR = new NoDirectBuffers(delegate); |
| 60 | + } |
| 61 | + } |
| 62 | + |
| 63 | + public static boolean useCopySocket() { |
| 64 | + return ALLOCATOR instanceof NoDirectBuffers; |
| 65 | + } |
| 66 | + |
| 67 | + public static ByteBufAllocator getAllocator() { |
| 68 | + return ALLOCATOR; |
| 69 | + } |
| 70 | + |
| 71 | + public static Class<? extends Channel> getChannelType() { |
| 72 | + if (ALLOCATOR instanceof NoDirectBuffers) { |
| 73 | + return CopyBytesSocketChannel.class; |
| 74 | + } else { |
| 75 | + return NioSocketChannel.class; |
| 76 | + } |
| 77 | + } |
| 78 | + |
| 79 | + public static Class<? extends ServerChannel> getServerChannelType() { |
| 80 | + if (ALLOCATOR instanceof NoDirectBuffers) { |
| 81 | + return CopyBytesServerSocketChannel.class; |
| 82 | + } else { |
| 83 | + return NioServerSocketChannel.class; |
| 84 | + } |
| 85 | + } |
| 86 | + |
| 87 | + private static boolean useUnpooled() { |
| 88 | + if (System.getProperty(USE_UNPOOLED) != null) { |
| 89 | + return Booleans.parseBoolean(System.getProperty(USE_UNPOOLED)); |
| 90 | + } else { |
| 91 | + long heapSize = JvmInfo.jvmInfo().getMem().getHeapMax().getBytes(); |
| 92 | + return heapSize <= 1 << 30; |
| 93 | + } |
| 94 | + } |
| 95 | + |
| 96 | + private static class NoDirectBuffers implements ByteBufAllocator { |
| 97 | + |
| 98 | + private final ByteBufAllocator delegate; |
| 99 | + |
| 100 | + private NoDirectBuffers(ByteBufAllocator delegate) { |
| 101 | + this.delegate = delegate; |
| 102 | + } |
| 103 | + |
| 104 | + @Override |
| 105 | + public ByteBuf buffer() { |
| 106 | + return heapBuffer(); |
| 107 | + } |
| 108 | + |
| 109 | + @Override |
| 110 | + public ByteBuf buffer(int initialCapacity) { |
| 111 | + return heapBuffer(initialCapacity); |
| 112 | + } |
| 113 | + |
| 114 | + @Override |
| 115 | + public ByteBuf buffer(int initialCapacity, int maxCapacity) { |
| 116 | + return heapBuffer(initialCapacity, maxCapacity); |
| 117 | + } |
| 118 | + |
| 119 | + @Override |
| 120 | + public ByteBuf ioBuffer() { |
| 121 | + return heapBuffer(); |
| 122 | + } |
| 123 | + |
| 124 | + @Override |
| 125 | + public ByteBuf ioBuffer(int initialCapacity) { |
| 126 | + return heapBuffer(initialCapacity); |
| 127 | + } |
| 128 | + |
| 129 | + @Override |
| 130 | + public ByteBuf ioBuffer(int initialCapacity, int maxCapacity) { |
| 131 | + return heapBuffer(initialCapacity, maxCapacity); |
| 132 | + } |
| 133 | + |
| 134 | + @Override |
| 135 | + public ByteBuf heapBuffer() { |
| 136 | + return delegate.heapBuffer(); |
| 137 | + } |
| 138 | + |
| 139 | + @Override |
| 140 | + public ByteBuf heapBuffer(int initialCapacity) { |
| 141 | + return delegate.heapBuffer(initialCapacity); |
| 142 | + } |
| 143 | + |
| 144 | + @Override |
| 145 | + public ByteBuf heapBuffer(int initialCapacity, int maxCapacity) { |
| 146 | + return delegate.heapBuffer(initialCapacity, maxCapacity); |
| 147 | + } |
| 148 | + |
| 149 | + @Override |
| 150 | + public ByteBuf directBuffer() { |
| 151 | + // TODO: Currently the Netty SslHandler requests direct ByteBufs even when interacting with the |
| 152 | + // JDK SSLEngine. This will be fixed in a future version of Netty. For now, return a heap |
| 153 | + // ByteBuf. After a Netty upgrade, return to throwing UnsupportedOperationException |
| 154 | + return heapBuffer(); |
| 155 | + } |
| 156 | + |
| 157 | + @Override |
| 158 | + public ByteBuf directBuffer(int initialCapacity) { |
| 159 | + // TODO: Currently the Netty SslHandler requests direct ByteBufs even when interacting with the |
| 160 | + // JDK SSLEngine. This will be fixed in a future version of Netty. For now, return a heap |
| 161 | + // ByteBuf. After a Netty upgrade, return to throwing UnsupportedOperationException |
| 162 | + return heapBuffer(initialCapacity); |
| 163 | + } |
| 164 | + |
| 165 | + @Override |
| 166 | + public ByteBuf directBuffer(int initialCapacity, int maxCapacity) { |
| 167 | + // TODO: Currently the Netty SslHandler requests direct ByteBufs even when interacting with the |
| 168 | + // JDK SSLEngine. This will be fixed in a future version of Netty. For now, return a heap |
| 169 | + // ByteBuf. After a Netty upgrade, return to throwing UnsupportedOperationException |
| 170 | + return heapBuffer(initialCapacity, maxCapacity); |
| 171 | + } |
| 172 | + |
| 173 | + @Override |
| 174 | + public CompositeByteBuf compositeBuffer() { |
| 175 | + return compositeHeapBuffer(); |
| 176 | + } |
| 177 | + |
| 178 | + @Override |
| 179 | + public CompositeByteBuf compositeBuffer(int maxNumComponents) { |
| 180 | + return compositeHeapBuffer(maxNumComponents); |
| 181 | + } |
| 182 | + |
| 183 | + @Override |
| 184 | + public CompositeByteBuf compositeHeapBuffer() { |
| 185 | + return delegate.compositeHeapBuffer(); |
| 186 | + } |
| 187 | + |
| 188 | + @Override |
| 189 | + public CompositeByteBuf compositeHeapBuffer(int maxNumComponents) { |
| 190 | + return delegate.compositeHeapBuffer(maxNumComponents); |
| 191 | + } |
| 192 | + |
| 193 | + @Override |
| 194 | + public CompositeByteBuf compositeDirectBuffer() { |
| 195 | + throw new UnsupportedOperationException("Direct buffers not supported."); |
| 196 | + } |
| 197 | + |
| 198 | + @Override |
| 199 | + public CompositeByteBuf compositeDirectBuffer(int maxNumComponents) { |
| 200 | + throw new UnsupportedOperationException("Direct buffers not supported."); |
| 201 | + } |
| 202 | + |
| 203 | + @Override |
| 204 | + public boolean isDirectBufferPooled() { |
| 205 | + assert delegate.isDirectBufferPooled() == false; |
| 206 | + return false; |
| 207 | + } |
| 208 | + |
| 209 | + @Override |
| 210 | + public int calculateNewCapacity(int minNewCapacity, int maxCapacity) { |
| 211 | + return delegate.calculateNewCapacity(minNewCapacity, maxCapacity); |
| 212 | + } |
| 213 | + } |
| 214 | +} |
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