| /* |
| * 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. |
| */ |
| package org.apache.phoenix.join; |
| |
| import java.io.*; |
| import java.sql.SQLException; |
| import java.util.*; |
| |
| import net.jcip.annotations.Immutable; |
| |
| import org.apache.hadoop.hbase.io.ImmutableBytesWritable; |
| import org.apache.hadoop.hbase.util.Bytes; |
| import org.apache.hadoop.io.WritableUtils; |
| |
| import org.apache.phoenix.cache.HashCache; |
| import org.apache.phoenix.coprocessor.ServerCachingProtocol.ServerCacheFactory; |
| import org.apache.phoenix.exception.SQLExceptionCode; |
| import org.apache.phoenix.exception.SQLExceptionInfo; |
| import org.apache.phoenix.expression.Expression; |
| import org.apache.phoenix.expression.ExpressionType; |
| import org.apache.phoenix.hbase.index.util.ImmutableBytesPtr; |
| import org.apache.phoenix.memory.MemoryManager.MemoryChunk; |
| import org.apache.phoenix.schema.tuple.ResultTuple; |
| import org.apache.phoenix.schema.tuple.Tuple; |
| import org.apache.phoenix.util.*; |
| |
| import org.iq80.snappy.CorruptionException; |
| import org.iq80.snappy.Snappy; |
| |
| public class HashCacheFactory implements ServerCacheFactory { |
| |
| public HashCacheFactory() { |
| } |
| |
| @Override |
| public void readFields(DataInput input) throws IOException { |
| } |
| |
| @Override |
| public void write(DataOutput output) throws IOException { |
| } |
| |
| @Override |
| public Closeable newCache(ImmutableBytesWritable cachePtr, byte[] txState, MemoryChunk chunk, boolean useProtoForIndexMaintainer) throws SQLException { |
| try { |
| // This reads the uncompressed length from the front of the compressed input |
| int uncompressedLen = Snappy.getUncompressedLength(cachePtr.get(), cachePtr.getOffset()); |
| byte[] uncompressed = new byte[uncompressedLen]; |
| Snappy.uncompress(cachePtr.get(), cachePtr.getOffset(), cachePtr.getLength(), |
| uncompressed, 0); |
| return new HashCacheImpl(uncompressed, chunk); |
| } catch (CorruptionException e) { |
| throw ServerUtil.parseServerException(e); |
| } |
| } |
| |
| @Immutable |
| private class HashCacheImpl implements HashCache { |
| private final Map<ImmutableBytesPtr,List<Tuple>> hashCache; |
| private final MemoryChunk memoryChunk; |
| private final boolean singleValueOnly; |
| |
| private HashCacheImpl(byte[] hashCacheBytes, MemoryChunk memoryChunk) { |
| try { |
| this.memoryChunk = memoryChunk; |
| byte[] hashCacheByteArray = hashCacheBytes; |
| int offset = 0; |
| ByteArrayInputStream input = new ByteArrayInputStream(hashCacheByteArray, offset, hashCacheBytes.length); |
| DataInputStream dataInput = new DataInputStream(input); |
| int nExprs = dataInput.readInt(); |
| List<Expression> onExpressions = new ArrayList<Expression>(nExprs); |
| for (int i = 0; i < nExprs; i++) { |
| int expressionOrdinal = WritableUtils.readVInt(dataInput); |
| Expression expression = ExpressionType.values()[expressionOrdinal].newInstance(); |
| expression.readFields(dataInput); |
| onExpressions.add(expression); |
| } |
| boolean singleValueOnly = false; |
| int exprSizeAndSingleValueOnly = dataInput.readInt(); |
| int exprSize = exprSizeAndSingleValueOnly; |
| if (exprSize < 0) { |
| exprSize *= -1; |
| singleValueOnly = true; |
| } |
| this.singleValueOnly = singleValueOnly; |
| offset += exprSize; |
| int nRows = dataInput.readInt(); |
| long estimatedSize = SizedUtil.sizeOfMap(nRows, SizedUtil.IMMUTABLE_BYTES_WRITABLE_SIZE, SizedUtil.RESULT_SIZE) + hashCacheBytes.length; |
| this.memoryChunk.resize(estimatedSize); |
| HashMap<ImmutableBytesPtr,List<Tuple>> hashCacheMap = new HashMap<ImmutableBytesPtr,List<Tuple>>(nRows * 5 / 4); |
| offset += Bytes.SIZEOF_INT; |
| // Build Map with evaluated hash key as key and row as value |
| for (int i = 0; i < nRows; i++) { |
| int resultSize = (int)Bytes.readVLong(hashCacheByteArray, offset); |
| offset += WritableUtils.decodeVIntSize(hashCacheByteArray[offset]); |
| ImmutableBytesWritable value = new ImmutableBytesWritable(hashCacheByteArray,offset,resultSize); |
| Tuple result = new ResultTuple(ResultUtil.toResult(value)); |
| ImmutableBytesPtr key = TupleUtil.getConcatenatedValue(result, onExpressions); |
| List<Tuple> tuples = hashCacheMap.get(key); |
| if (tuples == null) { |
| tuples = new LinkedList<Tuple>(); |
| hashCacheMap.put(key, tuples); |
| } |
| tuples.add(result); |
| offset += resultSize; |
| } |
| this.hashCache = Collections.unmodifiableMap(hashCacheMap); |
| } catch (IOException e) { // Not possible with ByteArrayInputStream |
| throw new RuntimeException(e); |
| } |
| } |
| |
| @Override |
| public void close() { |
| memoryChunk.close(); |
| } |
| |
| @Override |
| public List<Tuple> get(ImmutableBytesPtr hashKey) throws IOException { |
| List<Tuple> ret = hashCache.get(hashKey); |
| if (singleValueOnly && ret != null && ret.size() > 1) { |
| SQLException ex = new SQLExceptionInfo.Builder(SQLExceptionCode.SINGLE_ROW_SUBQUERY_RETURNS_MULTIPLE_ROWS).build().buildException(); |
| ServerUtil.throwIOException(ex.getMessage(), ex); |
| } |
| |
| return ret; |
| } |
| } |
| } |
| |