| /* |
| * 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.hadoop.hbase.io.encoding; |
| |
| import java.io.DataOutputStream; |
| import java.io.IOException; |
| import org.apache.hadoop.hbase.Cell; |
| import org.apache.hadoop.hbase.KeyValueUtil; |
| import org.apache.hadoop.hbase.io.ByteArrayOutputStream; |
| import org.apache.yetus.audience.InterfaceAudience; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| @InterfaceAudience.Private |
| public class RowIndexEncoderV1 { |
| private static final Logger LOG = LoggerFactory.getLogger(RowIndexEncoderV1.class); |
| |
| /** The Cell previously appended. */ |
| private Cell lastCell = null; |
| |
| private DataOutputStream out; |
| private NoneEncoder encoder; |
| private int startOffset = -1; |
| private ByteArrayOutputStream rowsOffsetBAOS = new ByteArrayOutputStream(64 * 4); |
| private final HFileBlockEncodingContext context; |
| |
| public RowIndexEncoderV1(DataOutputStream out, HFileBlockDefaultEncodingContext encodingCtx) { |
| this.out = out; |
| this.encoder = new NoneEncoder(out, encodingCtx); |
| this.context = encodingCtx; |
| } |
| |
| public int write(Cell cell) throws IOException { |
| // checkRow uses comparator to check we are writing in order. |
| if (!checkRow(cell)) { |
| if (startOffset < 0) { |
| startOffset = out.size(); |
| } |
| rowsOffsetBAOS.writeInt(out.size() - startOffset); |
| } |
| lastCell = cell; |
| return encoder.write(cell); |
| } |
| |
| protected boolean checkRow(final Cell cell) throws IOException { |
| boolean isDuplicateRow = false; |
| if (cell == null) { |
| throw new IOException("Key cannot be null or empty"); |
| } |
| if (lastCell != null) { |
| int keyComp = this.context.getHFileContext().getCellComparator().compareRows(lastCell, cell); |
| if (keyComp > 0) { |
| throw new IOException("Added a key not lexically larger than" |
| + " previous. Current cell = " + cell + ", lastCell = " + lastCell); |
| } else if (keyComp == 0) { |
| isDuplicateRow = true; |
| } |
| } |
| return isDuplicateRow; |
| } |
| |
| public void flush() throws IOException { |
| int onDiskDataSize = 0; |
| if (startOffset >= 0) { |
| onDiskDataSize = out.size() - startOffset; |
| } |
| out.writeInt(rowsOffsetBAOS.size() / 4); |
| if (rowsOffsetBAOS.size() > 0) { |
| out.write(rowsOffsetBAOS.getBuffer(), 0, rowsOffsetBAOS.size()); |
| } |
| out.writeInt(onDiskDataSize); |
| if (LOG.isTraceEnabled()) { |
| LOG.trace("RowNumber: " + rowsOffsetBAOS.size() / 4 |
| + ", onDiskDataSize: " + onDiskDataSize + ", totalOnDiskSize: " |
| + (out.size() - startOffset)); |
| } |
| } |
| |
| void beforeShipped() { |
| if (this.lastCell != null) { |
| this.lastCell = KeyValueUtil.toNewKeyCell(this.lastCell); |
| } |
| } |
| } |