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Posted to commits@tajo.apache.org by hy...@apache.org on 2014/12/12 06:59:55 UTC
[21/32] tajo git commit: TAJO-1233: Merge hbase_storage branch to the
master branch. (Hyoungjun Kim via hyunsik)
http://git-wip-us.apache.org/repos/asf/tajo/blob/4561711f/tajo-storage/src/main/java/org/apache/tajo/storage/rcfile/RCFile.java
----------------------------------------------------------------------
diff --git a/tajo-storage/src/main/java/org/apache/tajo/storage/rcfile/RCFile.java b/tajo-storage/src/main/java/org/apache/tajo/storage/rcfile/RCFile.java
deleted file mode 100644
index e5507ad..0000000
--- a/tajo-storage/src/main/java/org/apache/tajo/storage/rcfile/RCFile.java
+++ /dev/null
@@ -1,1805 +0,0 @@
-/**
- * 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.tajo.storage.rcfile;
-
-import org.apache.commons.lang.StringEscapeUtils;
-import org.apache.commons.lang.StringUtils;
-import org.apache.commons.logging.Log;
-import org.apache.commons.logging.LogFactory;
-import org.apache.hadoop.conf.Configuration;
-import org.apache.hadoop.fs.*;
-import org.apache.hadoop.fs.FileSystem;
-import org.apache.hadoop.io.*;
-import org.apache.hadoop.io.SequenceFile.Metadata;
-import org.apache.hadoop.io.compress.*;
-import org.apache.hadoop.util.ReflectionUtils;
-import org.apache.tajo.catalog.Column;
-import org.apache.tajo.catalog.Schema;
-import org.apache.tajo.catalog.TableMeta;
-import org.apache.tajo.catalog.proto.CatalogProtos;
-import org.apache.tajo.catalog.statistics.TableStats;
-import org.apache.tajo.conf.TajoConf;
-import org.apache.tajo.datum.Datum;
-import org.apache.tajo.datum.NullDatum;
-import org.apache.tajo.storage.*;
-import org.apache.tajo.storage.fragment.FileFragment;
-
-import java.io.Closeable;
-import java.io.*;
-import java.rmi.server.UID;
-import java.security.MessageDigest;
-import java.util.Arrays;
-
-/**
- * <code>RCFile</code>s, short of Record Columnar File, are flat files
- * consisting of binary key/value pairs, which shares much similarity with
- * <code>SequenceFile</code>.
- * <p/>
- * RCFile stores columns of a table in a record columnar way. It first
- * partitions rows horizontally into row splits. and then it vertically
- * partitions each row split in a columnar way. RCFile first stores the meta
- * data of a row split, as the key part of a record, and all the data of a row
- * split as the value part. When writing, RCFile.Writer first holds records'
- * value bytes in memory, and determines a row split if the raw bytes size of
- * buffered records overflow a given parameter<tt>Writer.columnsBufferSize</tt>,
- * which can be set like: <code>conf.setInt(COLUMNS_BUFFER_SIZE_CONF_STR,
- * 4 * 1024 * 1024)</code> .
- * <p>
- * <code>RCFile</code> provides {@link Writer}, {@link Reader} and classes for
- * writing, reading respectively.
- * </p>
- * <p/>
- * <p>
- * RCFile stores columns of a table in a record columnar way. It first
- * partitions rows horizontally into row splits. and then it vertically
- * partitions each row split in a columnar way. RCFile first stores the meta
- * data of a row split, as the key part of a record, and all the data of a row
- * split as the value part.
- * </p>
- * <p/>
- * <p>
- * RCFile compresses values in a more fine-grained manner then record level
- * compression. However, It currently does not support compress the key part
- * yet. The actual compression algorithm used to compress key and/or values can
- * be specified by using the appropriate {@link CompressionCodec}.
- * </p>
- * <p/>
- * <p>
- * The {@link Reader} is used to read and explain the bytes of RCFile.
- * </p>
- * <p/>
- * <h4 id="Formats">RCFile Formats</h4>
- * <p/>
- * <p/>
- * <h5 id="Header">RC Header</h5>
- * <ul>
- * <li>version - 3 bytes of magic header <b>RCF</b>, followed by 1 byte of
- * actual version number (e.g. RCF1)</li>
- * <li>compression - A boolean which specifies if compression is turned on for
- * keys/values in this file.</li>
- * <li>compression codec - <code>CompressionCodec</code> class which is used
- * for compression of keys and/or values (if compression is enabled).</li>
- * <li>metadata - {@link Metadata} for this file.</li>
- * <li>sync - A sync marker to denote end of the header.</li>
- * </ul>
- * <p/>
- * <h5>RCFile Format</h5>
- * <ul>
- * <li><a href="#Header">Header</a></li>
- * <li>Record
- * <li>Key part
- * <ul>
- * <li>Record length in bytes</li>
- * <li>Key length in bytes</li>
- * <li>Number_of_rows_in_this_record(vint)</li>
- * <li>Column_1_ondisk_length(vint)</li>
- * <li>Column_1_row_1_value_plain_length</li>
- * <li>Column_1_row_2_value_plain_length</li>
- * <li>...</li>
- * <li>Column_2_ondisk_length(vint)</li>
- * <li>Column_2_row_1_value_plain_length</li>
- * <li>Column_2_row_2_value_plain_length</li>
- * <li>...</li>
- * </ul>
- * </li>
- * </li>
- * <li>Value part
- * <ul>
- * <li>Compressed or plain data of [column_1_row_1_value,
- * column_1_row_2_value,....]</li>
- * <li>Compressed or plain data of [column_2_row_1_value,
- * column_2_row_2_value,....]</li>
- * </ul>
- * </li>
- * </ul>
- * <p>
- * <pre>
- * {@code
- * The following is a pseudo-BNF grammar for RCFile. Comments are prefixed
- * with dashes:
- *
- * rcfile ::=
- * <file-header>
- * <rcfile-rowgroup>+
- *
- * file-header ::=
- * <file-version-header>
- * <file-key-class-name> (only exists if version is seq6)
- * <file-value-class-name> (only exists if version is seq6)
- * <file-is-compressed>
- * <file-is-block-compressed> (only exists if version is seq6)
- * [<file-compression-codec-class>]
- * <file-header-metadata>
- * <file-sync-field>
- *
- * -- The normative RCFile implementation included with Hive is actually
- * -- based on a modified version of Hadoop's SequenceFile code. Some
- * -- things which should have been modified were not, including the code
- * -- that writes out the file version header. Consequently, RCFile and
- * -- SequenceFile originally shared the same version header. A newer
- * -- release has created a unique version string.
- *
- * file-version-header ::= Byte[4] {'S', 'E', 'Q', 6}
- * | Byte[4] {'R', 'C', 'F', 1}
- *
- * -- The name of the Java class responsible for reading the key buffer
- * -- component of the rowgroup.
- *
- * file-key-class-name ::=
- * Text {"org.apache.hadoop.hive.ql.io.RCFile$KeyBuffer"}
- *
- * -- The name of the Java class responsible for reading the value buffer
- * -- component of the rowgroup.
- *
- * file-value-class-name ::=
- * Text {"org.apache.hadoop.hive.ql.io.RCFile$ValueBuffer"}
- *
- * -- Boolean variable indicating whether or not the file uses compression
- * -- for the key and column buffer sections.
- *
- * file-is-compressed ::= Byte[1]
- *
- * -- A boolean field indicating whether or not the file is block compressed.
- * -- This field is *always* false. According to comments in the original
- * -- RCFile implementation this field was retained for backwards
- * -- compatability with the SequenceFile format.
- *
- * file-is-block-compressed ::= Byte[1] {false}
- *
- * -- The Java class name of the compression codec iff <file-is-compressed>
- * -- is true. The named class must implement
- * -- org.apache.hadoop.io.compress.CompressionCodec.
- * -- The expected value is org.apache.hadoop.io.compress.GzipCodec.
- *
- * file-compression-codec-class ::= Text
- *
- * -- A collection of key-value pairs defining metadata values for the
- * -- file. The Map is serialized using standard JDK serialization, i.e.
- * -- an Int corresponding to the number of key-value pairs, followed by
- * -- Text key and value pairs. The following metadata properties are
- * -- mandatory for all RCFiles:
- * --
- * -- hive.io.rcfile.column.number: the number of columns in the RCFile
- *
- * file-header-metadata ::= Map<Text, Text>
- *
- * -- A 16 byte marker that is generated by the writer. This marker appears
- * -- at regular intervals at the beginning of rowgroup-headers, and is
- * -- intended to enable readers to skip over corrupted rowgroups.
- *
- * file-sync-hash ::= Byte[16]
- *
- * -- Each row group is split into three sections: a header, a set of
- * -- key buffers, and a set of column buffers. The header section includes
- * -- an optional sync hash, information about the size of the row group, and
- * -- the total number of rows in the row group. Each key buffer
- * -- consists of run-length encoding data which is used to decode
- * -- the length and offsets of individual fields in the corresponding column
- * -- buffer.
- *
- * rcfile-rowgroup ::=
- * <rowgroup-header>
- * <rowgroup-key-data>
- * <rowgroup-column-buffers>
- *
- * rowgroup-header ::=
- * [<rowgroup-sync-marker>, <rowgroup-sync-hash>]
- * <rowgroup-record-length>
- * <rowgroup-key-length>
- * <rowgroup-compressed-key-length>
- *
- * -- rowgroup-key-data is compressed if the column data is compressed.
- * rowgroup-key-data ::=
- * <rowgroup-num-rows>
- * <rowgroup-key-buffers>
- *
- * -- An integer (always -1) signaling the beginning of a sync-hash
- * -- field.
- *
- * rowgroup-sync-marker ::= Int
- *
- * -- A 16 byte sync field. This must match the <file-sync-hash> value read
- * -- in the file header.
- *
- * rowgroup-sync-hash ::= Byte[16]
- *
- * -- The record-length is the sum of the number of bytes used to store
- * -- the key and column parts, i.e. it is the total length of the current
- * -- rowgroup.
- *
- * rowgroup-record-length ::= Int
- *
- * -- Total length in bytes of the rowgroup's key sections.
- *
- * rowgroup-key-length ::= Int
- *
- * -- Total compressed length in bytes of the rowgroup's key sections.
- *
- * rowgroup-compressed-key-length ::= Int
- *
- * -- Number of rows in the current rowgroup.
- *
- * rowgroup-num-rows ::= VInt
- *
- * -- One or more column key buffers corresponding to each column
- * -- in the RCFile.
- *
- * rowgroup-key-buffers ::= <rowgroup-key-buffer>+
- *
- * -- Data in each column buffer is stored using a run-length
- * -- encoding scheme that is intended to reduce the cost of
- * -- repeated column field values. This mechanism is described
- * -- in more detail in the following entries.
- *
- * rowgroup-key-buffer ::=
- * <column-buffer-length>
- * <column-buffer-uncompressed-length>
- * <column-key-buffer-length>
- * <column-key-buffer>
- *
- * -- The serialized length on disk of the corresponding column buffer.
- *
- * column-buffer-length ::= VInt
- *
- * -- The uncompressed length of the corresponding column buffer. This
- * -- is equivalent to column-buffer-length if the RCFile is not compressed.
- *
- * column-buffer-uncompressed-length ::= VInt
- *
- * -- The length in bytes of the current column key buffer
- *
- * column-key-buffer-length ::= VInt
- *
- * -- The column-key-buffer contains a sequence of serialized VInt values
- * -- corresponding to the byte lengths of the serialized column fields
- * -- in the corresponding rowgroup-column-buffer. For example, consider
- * -- an integer column that contains the consecutive values 1, 2, 3, 44.
- * -- The RCFile format stores these values as strings in the column buffer,
- * -- e.g. "12344". The length of each column field is recorded in
- * -- the column-key-buffer as a sequence of VInts: 1,1,1,2. However,
- * -- if the same length occurs repeatedly, then we replace repeated
- * -- run lengths with the complement (i.e. negative) of the number of
- * -- repetitions, so 1,1,1,2 becomes 1,~2,2.
- *
- * column-key-buffer ::= Byte[column-key-buffer-length]
- *
- * rowgroup-column-buffers ::= <rowgroup-value-buffer>+
- *
- * -- RCFile stores all column data as strings regardless of the
- * -- underlying column type. The strings are neither length-prefixed or
- * -- null-terminated, and decoding them into individual fields requires
- * -- the use of the run-length information contained in the corresponding
- * -- column-key-buffer.
- *
- * rowgroup-column-buffer ::= Byte[column-buffer-length]
- *
- * Byte ::= An eight-bit byte
- *
- * VInt ::= Variable length integer. The high-order bit of each byte
- * indicates whether more bytes remain to be read. The low-order seven
- * bits are appended as increasingly more significant bits in the
- * resulting integer value.
- *
- * Int ::= A four-byte integer in big-endian format.
- *
- * Text ::= VInt, Chars (Length prefixed UTF-8 characters)
- * }
- * </pre>
- * </p>
- */
-public class RCFile {
-
- private static final Log LOG = LogFactory.getLog(RCFile.class);
-
- public static final String RECORD_INTERVAL_CONF_STR = "hive.io.rcfile.record.interval";
- public static final String COLUMN_NUMBER_METADATA_STR = "hive.io.rcfile.column.number";
-
- // All of the versions should be place in this list.
- private static final int ORIGINAL_VERSION = 0; // version with SEQ
- private static final int NEW_MAGIC_VERSION = 1; // version with RCF
-
- private static final int CURRENT_VERSION = NEW_MAGIC_VERSION;
-
- // The first version of RCFile used the sequence file header.
- private static final byte[] ORIGINAL_MAGIC = new byte[]{
- (byte) 'S', (byte) 'E', (byte) 'Q'};
- // the version that was included with the original magic, which is mapped
- // into ORIGINAL_VERSION
- private static final byte ORIGINAL_MAGIC_VERSION_WITH_METADATA = 6;
-
- private static final byte[] ORIGINAL_MAGIC_VERSION = new byte[]{
- (byte) 'S', (byte) 'E', (byte) 'Q', ORIGINAL_MAGIC_VERSION_WITH_METADATA
- };
-
- // The 'magic' bytes at the beginning of the RCFile
- private static final byte[] MAGIC = new byte[]{
- (byte) 'R', (byte) 'C', (byte) 'F'};
-
- private static final int SYNC_ESCAPE = -1; // "length" of sync entries
- private static final int SYNC_HASH_SIZE = 16; // number of bytes in hash
- private static final int SYNC_SIZE = 4 + SYNC_HASH_SIZE; // escape + hash
-
- /**
- * The number of bytes between sync points.
- */
- public static final int SYNC_INTERVAL = 100 * SYNC_SIZE;
- public static final String NULL = "rcfile.null";
- public static final String SERDE = "rcfile.serde";
-
- /**
- * KeyBuffer is the key of each record in RCFile. Its on-disk layout is as
- * below:
- * <p/>
- * <ul>
- * <li>record length in bytes,it is the sum of bytes used to store the key
- * part and the value part.</li>
- * <li>Key length in bytes, it is how many bytes used by the key part.</li>
- * <li>number_of_rows_in_this_record(vint),</li>
- * <li>column_1_ondisk_length(vint),</li>
- * <li>column_1_row_1_value_plain_length,</li>
- * <li>column_1_row_2_value_plain_length,</li>
- * <li>....</li>
- * <li>column_2_ondisk_length(vint),</li>
- * <li>column_2_row_1_value_plain_length,</li>
- * <li>column_2_row_2_value_plain_length,</li>
- * <li>.... .</li>
- * <li>{the end of the key part}</li>
- * </ul>
- */
- public static class KeyBuffer {
- // each column's length in the value
- private int[] eachColumnValueLen = null;
- private int[] eachColumnUncompressedValueLen = null;
- // stores each cell's length of a column in one DataOutputBuffer element
- private NonSyncByteArrayOutputStream[] allCellValLenBuffer = null;
- // how many rows in this split
- private int numberRows = 0;
- // how many columns
- private int columnNumber = 0;
-
- KeyBuffer(int columnNum) {
- columnNumber = columnNum;
- eachColumnValueLen = new int[columnNumber];
- eachColumnUncompressedValueLen = new int[columnNumber];
- allCellValLenBuffer = new NonSyncByteArrayOutputStream[columnNumber];
- }
-
- public void readFields(DataInput in) throws IOException {
- eachColumnValueLen = new int[columnNumber];
- eachColumnUncompressedValueLen = new int[columnNumber];
- allCellValLenBuffer = new NonSyncByteArrayOutputStream[columnNumber];
-
- numberRows = WritableUtils.readVInt(in);
- for (int i = 0; i < columnNumber; i++) {
- eachColumnValueLen[i] = WritableUtils.readVInt(in);
- eachColumnUncompressedValueLen[i] = WritableUtils.readVInt(in);
- int bufLen = WritableUtils.readVInt(in);
- if (allCellValLenBuffer[i] == null) {
- allCellValLenBuffer[i] = new NonSyncByteArrayOutputStream();
- } else {
- allCellValLenBuffer[i].reset();
- }
- allCellValLenBuffer[i].write(in, bufLen);
- }
- }
-
- /**
- * @return the numberRows
- */
- public int getNumberRows() {
- return numberRows;
- }
- }
-
- /**
- * ValueBuffer is the value of each record in RCFile. Its on-disk layout is as
- * below:
- * <ul>
- * <li>Compressed or plain data of [column_1_row_1_value,
- * column_1_row_2_value,....]</li>
- * <li>Compressed or plain data of [column_2_row_1_value,
- * column_2_row_2_value,....]</li>
- * </ul>
- */
- public static class ValueBuffer implements Closeable{
-
- // used to load columns' value into memory
- private NonSyncByteArrayOutputStream[] loadedColumnsValueBuffer = null;
-
- boolean inited = false;
-
- // used for readFields
- KeyBuffer keyBuffer;
- private int columnNumber = 0;
-
- // set true for columns that needed to skip loading into memory.
- boolean[] skippedColIDs = null;
-
- CompressionCodec codec;
- Decompressor decompressor = null;
- NonSyncDataInputBuffer decompressBuffer = new NonSyncDataInputBuffer();
- private long readBytes = 0;
-
-
- public ValueBuffer(KeyBuffer currentKey, int columnNumber,
- int[] targets, CompressionCodec codec, boolean[] skippedIDs)
- throws IOException {
- keyBuffer = currentKey;
- this.columnNumber = columnNumber;
- this.skippedColIDs = skippedIDs;
- this.codec = codec;
- loadedColumnsValueBuffer = new NonSyncByteArrayOutputStream[targets.length];
- if (codec != null) {
- decompressor = org.apache.tajo.storage.compress.CodecPool.getDecompressor(codec);
- }
-
- for (int i = 0; i < targets.length; i++) {
- loadedColumnsValueBuffer[i] = new NonSyncByteArrayOutputStream();
- }
- }
-
- public void readFields(DataInput in) throws IOException {
- int addIndex = 0;
- int skipTotal = 0;
-
-
- for (int i = 0; i < columnNumber; i++) {
- int vaRowsLen = keyBuffer.eachColumnValueLen[i];
- // skip this column
- if (skippedColIDs[i]) {
- skipTotal += vaRowsLen;
- continue;
- }
-
- if (skipTotal != 0) {
- StorageUtil.skipFully(in, skipTotal);
- skipTotal = 0;
- }
-
- NonSyncByteArrayOutputStream valBuf;
- if (codec != null) {
- // load into compressed buf first
-
- byte[] compressedBytes = new byte[vaRowsLen];
- in.readFully(compressedBytes, 0, vaRowsLen);
-
- decompressBuffer.reset(compressedBytes, vaRowsLen);
- if(decompressor != null) decompressor.reset();
-
- DataInputStream is;
- if (codec instanceof SplittableCompressionCodec) {
- SplitCompressionInputStream deflatFilter = ((SplittableCompressionCodec) codec).createInputStream(
- decompressBuffer, decompressor, 0, vaRowsLen, SplittableCompressionCodec.READ_MODE.BYBLOCK);
- is = new DataInputStream(deflatFilter);
- } else {
- CompressionInputStream deflatFilter = codec.createInputStream(decompressBuffer, decompressor);
- is = new DataInputStream(deflatFilter);
- }
-
- valBuf = loadedColumnsValueBuffer[addIndex];
- valBuf.reset();
- valBuf.write(is, keyBuffer.eachColumnUncompressedValueLen[i]);
- is.close();
- decompressBuffer.close();
- } else {
- valBuf = loadedColumnsValueBuffer[addIndex];
- valBuf.reset();
- valBuf.write(in, vaRowsLen);
- }
- readBytes += keyBuffer.eachColumnUncompressedValueLen[i];
- addIndex++;
- }
-
- if (skipTotal != 0) {
- StorageUtil.skipFully(in, skipTotal);
- }
- }
-
- public long getReadBytes() {
- return readBytes;
- }
-
- public void clearColumnBuffer() throws IOException {
- decompressBuffer.reset();
- readBytes = 0;
- }
-
- @Override
- public void close() {
- for (NonSyncByteArrayOutputStream element : loadedColumnsValueBuffer) {
- IOUtils.closeStream(element);
- }
- if (codec != null) {
- IOUtils.closeStream(decompressBuffer);
- if (decompressor != null) {
- // Make sure we only return decompressor once.
- org.apache.tajo.storage.compress.CodecPool.returnDecompressor(decompressor);
- decompressor = null;
- }
- }
- }
- }
-
- /**
- * Create a metadata object with alternating key-value pairs.
- * Eg. metadata(key1, value1, key2, value2)
- */
- public static Metadata createMetadata(Text... values) {
- if (values.length % 2 != 0) {
- throw new IllegalArgumentException("Must have a matched set of " +
- "key-value pairs. " + values.length +
- " strings supplied.");
- }
- Metadata result = new Metadata();
- for (int i = 0; i < values.length; i += 2) {
- result.set(values[i], values[i + 1]);
- }
- return result;
- }
-
- /**
- * Write KeyBuffer/ValueBuffer pairs to a RCFile. RCFile's format is
- * compatible with SequenceFile's.
- */
- public static class RCFileAppender extends FileAppender {
- FSDataOutputStream out;
-
- CompressionCodec codec = null;
- Metadata metadata = null;
- FileSystem fs = null;
- TableStatistics stats = null;
- int columnNumber = 0;
-
- // how many records the writer buffers before it writes to disk
- private int RECORD_INTERVAL = Integer.MAX_VALUE;
- // the max size of memory for buffering records before writes them out
- private int COLUMNS_BUFFER_SIZE = 16 * 1024 * 1024; // 16M
- // the conf string for COLUMNS_BUFFER_SIZE
- public static final String COLUMNS_BUFFER_SIZE_CONF_STR = "hive.io.rcfile.record.buffer.size";
-
- // how many records already buffered
- private int bufferedRecords = 0;
- private ColumnBuffer[] columnBuffers = null;
- boolean useNewMagic = true;
- private byte[] nullChars;
- private SerializerDeserializer serde;
- private boolean isShuffle;
-
- // Insert a globally unique 16-byte value every few entries, so that one
- // can seek into the middle of a file and then synchronize with record
- // starts and ends by scanning for this value.
- long lastSyncPos; // position of last sync
- byte[] sync; // 16 random bytes
-
- {
- try {
- MessageDigest digester = MessageDigest.getInstance("MD5");
- long time = System.currentTimeMillis();
- digester.update((new UID() + "@" + time).getBytes());
- sync = digester.digest();
- } catch (Exception e) {
- throw new RuntimeException(e);
- }
- }
-
- /*
- * used for buffering appends before flush them out
- */
- class ColumnBuffer {
- // used for buffer a column's values
- NonSyncByteArrayOutputStream columnValBuffer;
- // used to store each value's length
- NonSyncByteArrayOutputStream valLenBuffer;
-
- /*
- * use a run-length encoding. We only record run length if a same
- * 'prevValueLen' occurs more than one time. And we negative the run
- * length to distinguish a runLength and a normal value length. For
- * example, if the values' lengths are 1,1,1,2, we record 1, ~2,2. And for
- * value lengths 1,2,3 we record 1,2,3.
- */
- int columnValueLength = 0;
- int uncompressedColumnValueLength = 0;
- int columnKeyLength = 0;
- int runLength = 0;
- int prevValueLength = -1;
-
- ColumnBuffer() throws IOException {
- columnValBuffer = new NonSyncByteArrayOutputStream();
- valLenBuffer = new NonSyncByteArrayOutputStream();
- }
-
- public int append(Column column, Datum datum) throws IOException {
- int currentLen = serde.serialize(column, datum, columnValBuffer, nullChars);
- columnValueLength += currentLen;
- uncompressedColumnValueLength += currentLen;
-
- if (prevValueLength < 0) {
- startNewGroup(currentLen);
- return currentLen;
- }
-
- if (currentLen != prevValueLength) {
- flushGroup();
- startNewGroup(currentLen);
- } else {
- runLength++;
- }
- return currentLen;
- }
-
- private void startNewGroup(int currentLen) {
- prevValueLength = currentLen;
- runLength = 0;
- }
-
- public void clear() {
- valLenBuffer.reset();
- columnValBuffer.reset();
- prevValueLength = -1;
- runLength = 0;
- columnValueLength = 0;
- columnKeyLength = 0;
- uncompressedColumnValueLength = 0;
- }
-
- public int flushGroup() {
- int len = 0;
- if (prevValueLength >= 0) {
- len += valLenBuffer.writeVLong(prevValueLength);
- if (runLength > 0) {
- len += valLenBuffer.writeVLong(~runLength);
- }
- columnKeyLength += len;
- runLength = -1;
- prevValueLength = -1;
- }
- return len;
- }
-
- public int UnFlushedGroupSize() {
- int len = 0;
- if (prevValueLength >= 0) {
- len += WritableUtils.getVIntSize(prevValueLength);
- if (runLength > 0) {
- len += WritableUtils.getVIntSize(~runLength);
- }
- }
- return len;
- }
- }
-
- public long getLength() throws IOException {
- return out.getPos();
- }
-
- public RCFileAppender(Configuration conf, final Schema schema, final TableMeta meta, final Path path) throws IOException {
- super(conf, schema, meta, path);
-
- RECORD_INTERVAL = conf.getInt(RECORD_INTERVAL_CONF_STR, RECORD_INTERVAL);
- COLUMNS_BUFFER_SIZE = conf.getInt(COLUMNS_BUFFER_SIZE_CONF_STR, COLUMNS_BUFFER_SIZE);
- columnNumber = schema.size();
- }
-
- public void init() throws IOException {
- fs = path.getFileSystem(conf);
-
- if (!fs.exists(path.getParent())) {
- throw new FileNotFoundException(path.toString());
- }
-
- //determine the intermediate file type
- String store = conf.get(TajoConf.ConfVars.SHUFFLE_FILE_FORMAT.varname,
- TajoConf.ConfVars.SHUFFLE_FILE_FORMAT.defaultVal);
- if (enabledStats && CatalogProtos.StoreType.RCFILE == CatalogProtos.StoreType.valueOf(store.toUpperCase())) {
- isShuffle = true;
- } else {
- isShuffle = false;
- }
-
- if (this.meta.containsOption(StorageConstants.COMPRESSION_CODEC)) {
- String codecClassname = this.meta.getOption(StorageConstants.COMPRESSION_CODEC);
- try {
- Class<? extends CompressionCodec> codecClass = conf.getClassByName(
- codecClassname).asSubclass(CompressionCodec.class);
- codec = ReflectionUtils.newInstance(codecClass, conf);
- } catch (ClassNotFoundException cnfe) {
- throw new IllegalArgumentException(
- "Unknown codec: " + codecClassname, cnfe);
- }
- }
-
- String nullCharacters = StringEscapeUtils.unescapeJava(this.meta.getOption(StorageConstants.RCFILE_NULL,
- NullDatum.DEFAULT_TEXT));
- if (StringUtils.isEmpty(nullCharacters)) {
- nullChars = NullDatum.get().asTextBytes();
- } else {
- nullChars = nullCharacters.getBytes();
- }
-
- if (metadata == null) {
- metadata = new Metadata();
- }
-
- metadata.set(new Text(COLUMN_NUMBER_METADATA_STR), new Text("" + columnNumber));
-
- String serdeClass = this.meta.getOption(StorageConstants.RCFILE_SERDE,
- BinarySerializerDeserializer.class.getName());
- try {
- serde = (SerializerDeserializer) Class.forName(serdeClass).newInstance();
- } catch (Exception e) {
- LOG.error(e.getMessage(), e);
- throw new IOException(e);
- }
- metadata.set(new Text(StorageConstants.RCFILE_SERDE), new Text(serdeClass));
-
- columnBuffers = new ColumnBuffer[columnNumber];
- for (int i = 0; i < columnNumber; i++) {
- columnBuffers[i] = new ColumnBuffer();
- }
-
- init(conf, fs.create(path, true, 4096, (short) 3, fs.getDefaultBlockSize(), null), codec, metadata);
- initializeFileHeader();
- writeFileHeader();
- finalizeFileHeader();
-
- if (enabledStats) {
- this.stats = new TableStatistics(this.schema);
- }
- super.init();
- }
-
- /**
- * Write the initial part of file header.
- */
- void initializeFileHeader() throws IOException {
- if (useNewMagic) {
- out.write(MAGIC);
- out.write(CURRENT_VERSION);
- } else {
- out.write(ORIGINAL_MAGIC_VERSION);
- }
- }
-
- /**
- * Write the final part of file header.
- */
- void finalizeFileHeader() throws IOException {
- out.write(sync); // write the sync bytes
- out.flush(); // flush header
- }
-
- boolean isCompressed() {
- return codec != null;
- }
-
- /**
- * Write and flush the file header.
- */
- void writeFileHeader() throws IOException {
- if (useNewMagic) {
- out.writeBoolean(isCompressed());
- } else {
- Text.writeString(out, "org.apache.hadoop.hive.ql.io.RCFile$KeyBuffer");
- Text.writeString(out, "org.apache.hadoop.hive.ql.io.RCFile$ValueBuffer");
- out.writeBoolean(isCompressed());
- out.writeBoolean(false);
- }
-
- if (isCompressed()) {
- Text.writeString(out, (codec.getClass()).getName());
- }
- metadata.write(out);
- }
-
- void init(Configuration conf, FSDataOutputStream out,
- CompressionCodec codec, Metadata metadata) throws IOException {
- this.out = out;
- this.codec = codec;
- this.metadata = metadata;
- this.useNewMagic = conf.getBoolean(TajoConf.ConfVars.HIVEUSEEXPLICITRCFILEHEADER.varname, true);
- }
-
- /**
- * create a sync point.
- */
- public void sync() throws IOException {
- if (sync != null && lastSyncPos != out.getPos()) {
- out.writeInt(SYNC_ESCAPE); // mark the start of the sync
- out.write(sync); // write sync
- lastSyncPos = out.getPos(); // update lastSyncPos
- }
- }
-
- private void checkAndWriteSync() throws IOException {
- if (sync != null && out.getPos() >= lastSyncPos + SYNC_INTERVAL) {
- sync();
- }
- }
-
- private int columnBufferSize = 0;
-
- @Override
- public long getOffset() throws IOException {
- return out.getPos();
- }
-
- @Override
- public void flush() throws IOException {
- flushRecords();
- out.flush();
- }
-
- @Override
- public void addTuple(Tuple t) throws IOException {
- append(t);
- // Statistical section
-
- if (enabledStats) {
- stats.incrementRow();
- }
- }
-
- /**
- * Append a row of values. Currently it only can accept <
- * {@link Tuple}. If its <code>size()</code> is less than the
- * column number in the file, zero bytes are appended for the empty columns.
- * If its size() is greater then the column number in the file, the exceeded
- * columns' bytes are ignored.
- *
- * @param tuple a Tuple with the list of serialized columns
- * @throws IOException
- */
- public void append(Tuple tuple) throws IOException {
- int size = schema.size();
-
- for (int i = 0; i < size; i++) {
- Datum datum = tuple.get(i);
- int length = columnBuffers[i].append(schema.getColumn(i), datum);
- columnBufferSize += length;
- if (isShuffle) {
- // it is to calculate min/max values, and it is only used for the intermediate file.
- stats.analyzeField(i, datum);
- }
- }
-
- if (size < columnNumber) {
- for (int i = size; i < columnNumber; i++) {
- columnBuffers[i].append(schema.getColumn(i), NullDatum.get());
- if (isShuffle) {
- stats.analyzeField(i, NullDatum.get());
- }
- }
- }
-
- bufferedRecords++;
- //TODO compression rate base flush
- if ((columnBufferSize > COLUMNS_BUFFER_SIZE)
- || (bufferedRecords >= RECORD_INTERVAL)) {
- flushRecords();
- }
- }
-
- /**
- * get number of bytes to store the keyBuffer.
- *
- * @return number of bytes used to store this KeyBuffer on disk
- * @throws IOException
- */
- public int getKeyBufferSize() throws IOException {
- int ret = 0;
- ret += WritableUtils.getVIntSize(bufferedRecords);
- for (int i = 0; i < columnBuffers.length; i++) {
- ColumnBuffer currentBuf = columnBuffers[i];
- ret += WritableUtils.getVIntSize(currentBuf.columnValueLength);
- ret += WritableUtils.getVIntSize(currentBuf.uncompressedColumnValueLength);
- ret += WritableUtils.getVIntSize(currentBuf.columnKeyLength);
- ret += currentBuf.columnKeyLength;
- }
-
- return ret;
- }
-
- /**
- * get number of bytes to store the key part.
- *
- * @return number of bytes used to store this Key part on disk
- * @throws IOException
- */
- public int getKeyPartSize() throws IOException {
- int ret = 12; //12 bytes |record count, key length, compressed key length|
-
- ret += WritableUtils.getVIntSize(bufferedRecords);
- for (int i = 0; i < columnBuffers.length; i++) {
- ColumnBuffer currentBuf = columnBuffers[i];
- ret += WritableUtils.getVIntSize(currentBuf.columnValueLength);
- ret += WritableUtils.getVIntSize(currentBuf.uncompressedColumnValueLength);
- ret += WritableUtils.getVIntSize(currentBuf.columnKeyLength);
- ret += currentBuf.columnKeyLength;
- ret += currentBuf.UnFlushedGroupSize();
- }
-
- return ret;
- }
-
- private void WriteKeyBuffer(DataOutputStream out) throws IOException {
- WritableUtils.writeVLong(out, bufferedRecords);
- for (int i = 0; i < columnBuffers.length; i++) {
- ColumnBuffer currentBuf = columnBuffers[i];
- WritableUtils.writeVLong(out, currentBuf.columnValueLength);
- WritableUtils.writeVLong(out, currentBuf.uncompressedColumnValueLength);
- WritableUtils.writeVLong(out, currentBuf.columnKeyLength);
- currentBuf.valLenBuffer.writeTo(out);
- }
- }
-
- private void flushRecords() throws IOException {
-
- Compressor compressor = null;
- NonSyncByteArrayOutputStream valueBuffer = null;
- CompressionOutputStream deflateFilter = null;
- DataOutputStream deflateOut = null;
- boolean isCompressed = isCompressed();
-
- int valueLength = 0;
- if (isCompressed) {
- compressor = org.apache.tajo.storage.compress.CodecPool.getCompressor(codec);
- if (compressor != null) compressor.reset(); //builtin gzip is null
-
- valueBuffer = new NonSyncByteArrayOutputStream();
- deflateFilter = codec.createOutputStream(valueBuffer, compressor);
- deflateOut = new DataOutputStream(deflateFilter);
- }
-
- try {
- for (int columnIndex = 0; columnIndex < columnNumber; columnIndex++) {
- ColumnBuffer currentBuf = columnBuffers[columnIndex];
- currentBuf.flushGroup();
-
- NonSyncByteArrayOutputStream columnValue = currentBuf.columnValBuffer;
- int colLen;
- int plainLen = columnValue.getLength();
- if (isCompressed) {
- deflateFilter.resetState();
- deflateOut.write(columnValue.getData(), 0, columnValue.getLength());
- deflateOut.flush();
- deflateFilter.finish();
- columnValue.close();
- // find how much compressed data was added for this column
- colLen = valueBuffer.getLength() - valueLength;
- currentBuf.columnValueLength = colLen;
- } else {
- colLen = plainLen;
- }
- valueLength += colLen;
- }
- } catch (IOException e) {
- IOUtils.cleanup(LOG, deflateOut, out);
- throw e;
- }
-
- if (compressor != null) {
- org.apache.tajo.storage.compress.CodecPool.returnCompressor(compressor);
- }
-
- int keyLength = getKeyBufferSize();
- if (keyLength < 0) {
- throw new IOException("negative length keys not allowed: " + keyLength);
- }
- // Write the key out
- writeKey(keyLength + valueLength, keyLength);
- // write the value out
- if (isCompressed) {
- try {
- out.write(valueBuffer.getData(), 0, valueBuffer.getLength());
- } finally {
- IOUtils.cleanup(LOG, valueBuffer);
- }
- } else {
- for (int columnIndex = 0; columnIndex < columnNumber; ++columnIndex) {
- columnBuffers[columnIndex].columnValBuffer.writeTo(out);
- if (LOG.isDebugEnabled()) {
- LOG.debug("Column#" + columnIndex + " : Plain Total Column Value Length: "
- + columnBuffers[columnIndex].uncompressedColumnValueLength
- + ", Compr Total Column Value Length: " + columnBuffers[columnIndex].columnValueLength);
- }
- }
- }
- // clear the columnBuffers
- clearColumnBuffers();
-
- bufferedRecords = 0;
- columnBufferSize = 0;
- }
-
- private void writeKey(int recordLen, int keyLength) throws IOException {
- checkAndWriteSync(); // sync
- out.writeInt(recordLen); // total record length
- out.writeInt(keyLength); // key portion length
-
- if (this.isCompressed()) {
- Compressor compressor = org.apache.tajo.storage.compress.CodecPool.getCompressor(codec);
- if (compressor != null) compressor.reset(); //builtin gzip is null
-
- NonSyncByteArrayOutputStream compressionBuffer = new NonSyncByteArrayOutputStream();
- CompressionOutputStream deflateFilter = codec.createOutputStream(compressionBuffer, compressor);
- DataOutputStream deflateOut = new DataOutputStream(deflateFilter);
-
- //compress key and write key out
- compressionBuffer.reset();
- deflateFilter.resetState();
- WriteKeyBuffer(deflateOut);
- deflateOut.flush();
- deflateFilter.finish();
- int compressedKeyLen = compressionBuffer.getLength();
- out.writeInt(compressedKeyLen);
- compressionBuffer.writeTo(out);
- compressionBuffer.reset();
- deflateOut.close();
- org.apache.tajo.storage.compress.CodecPool.returnCompressor(compressor);
- } else {
- out.writeInt(keyLength);
- WriteKeyBuffer(out);
- }
- }
-
- private void clearColumnBuffers() throws IOException {
- for (int i = 0; i < columnNumber; i++) {
- columnBuffers[i].clear();
- }
- }
-
- @Override
- public TableStats getStats() {
- if (enabledStats) {
- return stats.getTableStat();
- } else {
- return null;
- }
- }
-
- @Override
- public void close() throws IOException {
- if (bufferedRecords > 0) {
- flushRecords();
- }
- clearColumnBuffers();
-
- if (out != null) {
- // Statistical section
- if (enabledStats) {
- stats.setNumBytes(getOffset());
- }
- // Close the underlying stream if we own it...
- out.flush();
- IOUtils.cleanup(LOG, out);
- out = null;
- }
- }
- }
-
- /**
- * Read KeyBuffer/ValueBuffer pairs from a RCFile.
- */
- public static class RCFileScanner extends FileScanner {
- private static class SelectedColumn {
- public int colIndex;
- public int rowReadIndex;
- public int runLength;
- public int prvLength;
- public boolean isNulled;
- }
-
- private FSDataInputStream in;
-
- private byte version;
-
- private CompressionCodec codec = null;
- private Metadata metadata = null;
-
- private byte[] sync;
- private byte[] syncCheck;
- private boolean syncSeen;
- private long lastSeenSyncPos = 0;
-
- private long headerEnd;
- private long start, end;
- private final long startOffset, endOffset;
- private int[] targetColumnIndexes;
-
- private int currentKeyLength;
- private int currentRecordLength;
-
- private ValueBuffer currentValue;
-
- private int readRowsIndexInBuffer = 0;
-
- private int recordsNumInValBuffer = 0;
-
- private int columnNumber = 0;
-
- private boolean more = true;
-
- private int passedRowsNum = 0;
-
- private boolean decompress = false;
-
- private Decompressor keyDecompressor;
-
- private long readBytes = 0;
-
- //Current state of each selected column - e.g. current run length, etc.
- // The size of the array is equal to the number of selected columns
- private SelectedColumn[] selectedColumns;
-
- // column value lengths for each of the selected columns
- private NonSyncDataInputBuffer[] colValLenBufferReadIn;
-
- private LongWritable rowId;
- private byte[] nullChars;
- private SerializerDeserializer serde;
-
- public RCFileScanner(Configuration conf, final Schema schema, final TableMeta meta,
- final FileFragment fragment) throws IOException {
- super(conf, schema, meta, fragment);
- conf.setInt("io.file.buffer.size", 4096); //TODO remove
-
- startOffset = fragment.getStartKey();
- endOffset = startOffset + fragment.getEndKey();
- start = 0;
- }
-
- @Override
- public void init() throws IOException {
- sync = new byte[SYNC_HASH_SIZE];
- syncCheck = new byte[SYNC_HASH_SIZE];
-
- more = startOffset < endOffset;
- rowId = new LongWritable();
- readBytes = 0;
-
- String nullCharacters = StringEscapeUtils.unescapeJava(meta.getOption(StorageConstants.RCFILE_NULL,
- NullDatum.DEFAULT_TEXT));
- if (StringUtils.isEmpty(nullCharacters)) {
- nullChars = NullDatum.get().asTextBytes();
- } else {
- nullChars = nullCharacters.getBytes();
- }
-
- // projection
- if (targets == null) {
- targets = schema.toArray();
- }
-
- targetColumnIndexes = new int[targets.length];
- for (int i = 0; i < targets.length; i++) {
- targetColumnIndexes[i] = schema.getColumnId(targets[i].getQualifiedName());
- }
- Arrays.sort(targetColumnIndexes);
-
- FileSystem fs = fragment.getPath().getFileSystem(conf);
- end = fs.getFileStatus(fragment.getPath()).getLen();
- in = openFile(fs, fragment.getPath(), 4096);
- if (LOG.isDebugEnabled()) {
- LOG.debug("RCFile open:" + fragment.getPath() + "," + start + "," + (endOffset - startOffset) +
- "," + fs.getFileStatus(fragment.getPath()).getLen());
- }
- //init RCFILE Header
- boolean succeed = false;
- try {
- if (start > 0) {
- seek(0);
- initHeader();
- } else {
- initHeader();
- }
- succeed = true;
- } finally {
- if (!succeed) {
- if (in != null) {
- try {
- in.close();
- } catch (IOException e) {
- if (LOG != null && LOG.isDebugEnabled()) {
- LOG.debug("Exception in closing " + in, e);
- }
- }
- }
- }
- }
-
- columnNumber = Integer.parseInt(metadata.get(new Text(COLUMN_NUMBER_METADATA_STR)).toString());
- selectedColumns = new SelectedColumn[targetColumnIndexes.length];
- colValLenBufferReadIn = new NonSyncDataInputBuffer[targetColumnIndexes.length];
- boolean[] skippedColIDs = new boolean[columnNumber];
- Arrays.fill(skippedColIDs, true);
- super.init();
-
- for (int i = 0; i < targetColumnIndexes.length; i++) {
- int tid = targetColumnIndexes[i];
- if (tid < columnNumber) {
- skippedColIDs[tid] = false;
-
- SelectedColumn col = new SelectedColumn();
- col.colIndex = tid;
- col.runLength = 0;
- col.prvLength = -1;
- col.rowReadIndex = 0;
- selectedColumns[i] = col;
- colValLenBufferReadIn[i] = new NonSyncDataInputBuffer();
- }
- }
-
- currentKey = createKeyBuffer();
- currentValue = new ValueBuffer(null, columnNumber, targetColumnIndexes, codec, skippedColIDs);
-
- if (startOffset > getPosition()) { // TODO use sync cache
- sync(startOffset); // sync to start
- }
- }
-
- /**
- * Return the metadata (Text to Text map) that was written into the
- * file.
- */
- public Metadata getMetadata() {
- return metadata;
- }
-
- /**
- * Return the metadata value associated with the given key.
- *
- * @param key the metadata key to retrieve
- */
- public Text getMetadataValueOf(Text key) {
- return metadata.get(key);
- }
-
- /**
- * Override this method to specialize the type of
- * {@link FSDataInputStream} returned.
- */
- protected FSDataInputStream openFile(FileSystem fs, Path file, int bufferSize) throws IOException {
- return fs.open(file, bufferSize);
- }
-
- private void initHeader() throws IOException {
- byte[] magic = new byte[MAGIC.length];
- in.readFully(magic);
-
- if (Arrays.equals(magic, ORIGINAL_MAGIC)) {
- byte vers = in.readByte();
- if (vers != ORIGINAL_MAGIC_VERSION_WITH_METADATA) {
- throw new IOException(fragment.getPath() + " is a version " + vers +
- " SequenceFile instead of an RCFile.");
- }
- version = ORIGINAL_VERSION;
- } else {
- if (!Arrays.equals(magic, MAGIC)) {
- throw new IOException(fragment.getPath() + " not a RCFile and has magic of " +
- new String(magic));
- }
-
- // Set 'version'
- version = in.readByte();
- if (version > CURRENT_VERSION) {
- throw new VersionMismatchException((byte) CURRENT_VERSION, version);
- }
- }
-
- if (version == ORIGINAL_VERSION) {
- try {
- Class<?> keyCls = conf.getClassByName(Text.readString(in));
- Class<?> valCls = conf.getClassByName(Text.readString(in));
- if (!keyCls.equals(KeyBuffer.class)
- || !valCls.equals(ValueBuffer.class)) {
- throw new IOException(fragment.getPath() + " not a RCFile");
- }
- } catch (ClassNotFoundException e) {
- throw new IOException(fragment.getPath() + " not a RCFile", e);
- }
- }
-
- decompress = in.readBoolean(); // is compressed?
-
- if (version == ORIGINAL_VERSION) {
- // is block-compressed? it should be always false.
- boolean blkCompressed = in.readBoolean();
- if (blkCompressed) {
- throw new IOException(fragment.getPath() + " not a RCFile.");
- }
- }
-
- // setup the compression codec
- if (decompress) {
- String codecClassname = Text.readString(in);
- try {
- Class<? extends CompressionCodec> codecClass = conf.getClassByName(
- codecClassname).asSubclass(CompressionCodec.class);
- codec = ReflectionUtils.newInstance(codecClass, conf);
- } catch (ClassNotFoundException cnfe) {
- throw new IllegalArgumentException(
- "Unknown codec: " + codecClassname, cnfe);
- }
-
- keyDecompressor = org.apache.tajo.storage.compress.CodecPool.getDecompressor(codec);
- }
-
- metadata = new Metadata();
- metadata.readFields(in);
-
- Text text = metadata.get(new Text(StorageConstants.RCFILE_SERDE));
-
- try {
- String serdeClass;
- if(text != null && !text.toString().isEmpty()){
- serdeClass = text.toString();
- } else{
- serdeClass = this.meta.getOption(StorageConstants.RCFILE_SERDE, BinarySerializerDeserializer.class.getName());
- }
- serde = (SerializerDeserializer) Class.forName(serdeClass).newInstance();
- } catch (Exception e) {
- LOG.error(e.getMessage(), e);
- throw new IOException(e);
- }
-
- in.readFully(sync); // read sync bytes
- headerEnd = in.getPos();
- lastSeenSyncPos = headerEnd; //initial sync position
- readBytes += headerEnd;
- }
-
- /**
- * Return the current byte position in the input file.
- */
- public long getPosition() throws IOException {
- return in.getPos();
- }
-
- /**
- * Set the current byte position in the input file.
- * <p/>
- * <p/>
- * The position passed must be a position returned by
- * {@link RCFile.RCFileAppender#getLength()} when writing this file. To seek to an
- * arbitrary position, use {@link RCFile.RCFileScanner#sync(long)}. In another
- * words, the current seek can only seek to the end of the file. For other
- * positions, use {@link RCFile.RCFileScanner#sync(long)}.
- */
- public void seek(long position) throws IOException {
- in.seek(position);
- }
-
- /**
- * Resets the values which determine if there are more rows in the buffer
- * <p/>
- * This can be used after one calls seek or sync, if one called next before that.
- * Otherwise, the seek or sync will have no effect, it will continue to get rows from the
- * buffer built up from the call to next.
- */
- public void resetBuffer() {
- readRowsIndexInBuffer = 0;
- recordsNumInValBuffer = 0;
- }
-
- /**
- * Seek to the next sync mark past a given position.
- */
- public void sync(long position) throws IOException {
- if (position + SYNC_SIZE >= end) {
- seek(end);
- return;
- }
-
- //this is to handle syn(pos) where pos < headerEnd.
- if (position < headerEnd) {
- // seek directly to first record
- in.seek(headerEnd);
- // note the sync marker "seen" in the header
- syncSeen = true;
- return;
- }
-
- try {
- seek(position + 4); // skip escape
-
- int prefix = sync.length;
- int n = conf.getInt("io.bytes.per.checksum", 512);
- byte[] buffer = new byte[prefix + n];
- n = (int) Math.min(n, end - in.getPos());
- /* fill array with a pattern that will never match sync */
- Arrays.fill(buffer, (byte) (~sync[0]));
- while (n > 0 && (in.getPos() + n) <= end) {
- position = in.getPos();
- in.readFully(buffer, prefix, n);
- readBytes += n;
- /* the buffer has n+sync bytes */
- for (int i = 0; i < n; i++) {
- int j;
- for (j = 0; j < sync.length && sync[j] == buffer[i + j]; j++) {
- /* nothing */
- }
- if (j == sync.length) {
- /* simplified from (position + (i - prefix) + sync.length) - SYNC_SIZE */
- in.seek(position + i - SYNC_SIZE);
- return;
- }
- }
- /* move the last 16 bytes to the prefix area */
- System.arraycopy(buffer, buffer.length - prefix, buffer, 0, prefix);
- n = (int) Math.min(n, end - in.getPos());
- }
- } catch (ChecksumException e) { // checksum failure
- handleChecksumException(e);
- }
- }
-
- private void handleChecksumException(ChecksumException e) throws IOException {
- if (conf.getBoolean("io.skip.checksum.errors", false)) {
- LOG.warn("Bad checksum at " + getPosition() + ". Skipping entries.");
- sync(getPosition() + conf.getInt("io.bytes.per.checksum", 512));
- } else {
- throw e;
- }
- }
-
- private KeyBuffer createKeyBuffer() {
- return new KeyBuffer(columnNumber);
- }
-
- /**
- * Read and return the next record length, potentially skipping over a sync
- * block.
- *
- * @return the length of the next record or -1 if there is no next record
- * @throws IOException
- */
- private int readRecordLength() throws IOException {
- if (in.getPos() >= end) {
- return -1;
- }
- int length = in.readInt();
- readBytes += 4;
- if (sync != null && length == SYNC_ESCAPE) { // process
- // a
- // sync entry
- lastSeenSyncPos = in.getPos() - 4; // minus SYNC_ESCAPE's length
- in.readFully(syncCheck); // read syncCheck
- readBytes += SYNC_HASH_SIZE;
- if (!Arrays.equals(sync, syncCheck)) {
- throw new IOException("File is corrupt!");
- }
- syncSeen = true;
- if (in.getPos() >= end) {
- return -1;
- }
- length = in.readInt(); // re-read length
- readBytes += 4;
- } else {
- syncSeen = false;
- }
- return length;
- }
-
- private void seekToNextKeyBuffer() throws IOException {
- if (!keyInit) {
- return;
- }
- if (!currentValue.inited) {
- IOUtils.skipFully(in, currentRecordLength - currentKeyLength);
- }
- }
-
- private int compressedKeyLen = 0;
- NonSyncDataInputBuffer keyDataIn = new NonSyncDataInputBuffer();
- NonSyncDataInputBuffer keyDecompressBuffer = new NonSyncDataInputBuffer();
-
- KeyBuffer currentKey = null;
- boolean keyInit = false;
-
- protected int nextKeyBuffer() throws IOException {
- seekToNextKeyBuffer();
- currentRecordLength = readRecordLength();
- if (currentRecordLength == -1) {
- keyInit = false;
- return -1;
- }
- currentKeyLength = in.readInt();
- compressedKeyLen = in.readInt();
- readBytes += 8;
- if (decompress) {
-
- byte[] compressedBytes = new byte[compressedKeyLen];
- in.readFully(compressedBytes, 0, compressedKeyLen);
-
- if (keyDecompressor != null) keyDecompressor.reset();
- keyDecompressBuffer.reset(compressedBytes, compressedKeyLen);
-
- DataInputStream is;
- if (codec instanceof SplittableCompressionCodec) {
- SplitCompressionInputStream deflatFilter = ((SplittableCompressionCodec) codec).createInputStream(
- keyDecompressBuffer, keyDecompressor, 0, compressedKeyLen, SplittableCompressionCodec.READ_MODE.BYBLOCK);
-
- keyDecompressBuffer.seek(deflatFilter.getAdjustedStart());
- is = new DataInputStream(deflatFilter);
- } else {
- CompressionInputStream deflatFilter = codec.createInputStream(keyDecompressBuffer, keyDecompressor);
- is = new DataInputStream(deflatFilter);
- }
-
- byte[] deCompressedBytes = new byte[currentKeyLength];
-
- is.readFully(deCompressedBytes, 0, currentKeyLength);
- keyDataIn.reset(deCompressedBytes, currentKeyLength);
- currentKey.readFields(keyDataIn);
- is.close();
- } else {
- currentKey.readFields(in);
- }
- readBytes += currentKeyLength;
- keyInit = true;
- currentValue.inited = false;
-
- readRowsIndexInBuffer = 0;
- recordsNumInValBuffer = currentKey.numberRows;
-
- for (int selIx = 0; selIx < selectedColumns.length; selIx++) {
- SelectedColumn col = selectedColumns[selIx];
- if (col == null) {
- col = new SelectedColumn();
- col.isNulled = true;
- selectedColumns[selIx] = col;
- continue;
- }
-
- int colIx = col.colIndex;
- NonSyncByteArrayOutputStream buf = currentKey.allCellValLenBuffer[colIx];
- colValLenBufferReadIn[selIx].reset(buf.getData(), buf.getLength());
- col.rowReadIndex = 0;
- col.runLength = 0;
- col.prvLength = -1;
- col.isNulled = buf.getLength() == 0;
- }
-
- return currentKeyLength;
- }
-
- protected void currentValueBuffer() throws IOException {
- if (!keyInit) {
- nextKeyBuffer();
- }
- currentValue.keyBuffer = currentKey;
- currentValue.clearColumnBuffer();
- currentValue.readFields(in);
- currentValue.inited = true;
- readBytes += currentValue.getReadBytes();
-
- if (tableStats != null) {
- tableStats.setReadBytes(readBytes);
- tableStats.setNumRows(passedRowsNum);
- }
- }
-
- private boolean rowFetched = false;
-
- @Override
- public Tuple next() throws IOException {
- if (!more) {
- return null;
- }
-
- more = nextBuffer(rowId);
- long lastSeenSyncPos = lastSeenSyncPos();
- if (lastSeenSyncPos >= endOffset) {
- more = false;
- return null;
- }
-
- if (!more) {
- return null;
- }
-
- Tuple tuple = new VTuple(schema.size());
- getCurrentRow(tuple);
- return tuple;
- }
-
- @Override
- public float getProgress() {
- try {
- if(!more) {
- return 1.0f;
- }
- long filePos = getPosition();
- if (startOffset == filePos) {
- return 0.0f;
- } else {
- //if scanner read the header, filePos moved to zero
- return Math.min(1.0f, (float)(Math.max(filePos - startOffset, 0)) / (float)(fragment.getEndKey()));
- }
- } catch (IOException e) {
- LOG.error(e.getMessage(), e);
- return 0.0f;
- }
- }
-
- /**
- * Returns how many rows we fetched with nextBuffer(). It only means how many rows
- * are read by nextBuffer(). The returned result may be smaller than actual number
- * of rows passed by, because {@link #seek(long)} can change the underlying key buffer and
- * value buffer.
- *
- * @return next row number
- * @throws IOException
- */
- public boolean nextBuffer(LongWritable readRows) throws IOException {
- if (readRowsIndexInBuffer < recordsNumInValBuffer) {
- readRows.set(passedRowsNum);
- readRowsIndexInBuffer++;
- passedRowsNum++;
- rowFetched = false;
- return true;
- } else {
- keyInit = false;
- }
-
- int ret = -1;
- try {
- ret = nextKeyBuffer();
- } catch (EOFException eof) {
- eof.printStackTrace();
- }
- return (ret > 0) && nextBuffer(readRows);
- }
-
- /**
- * get the current row used,make sure called {@link #next()}
- * first.
- *
- * @throws IOException
- */
- public void getCurrentRow(Tuple tuple) throws IOException {
- if (!keyInit || rowFetched) {
- return;
- }
-
- if (!currentValue.inited) {
- currentValueBuffer();
- }
-
- for (int j = 0; j < selectedColumns.length; ++j) {
- SelectedColumn col = selectedColumns[j];
- int i = col.colIndex;
-
- if (col.isNulled) {
- tuple.put(i, NullDatum.get());
- } else {
- colAdvanceRow(j, col);
-
- Datum datum = serde.deserialize(schema.getColumn(i),
- currentValue.loadedColumnsValueBuffer[j].getData(), col.rowReadIndex, col.prvLength, nullChars);
- tuple.put(i, datum);
- col.rowReadIndex += col.prvLength;
- }
- }
- rowFetched = true;
- }
-
- /**
- * Advance column state to the next now: update offsets, run lengths etc
- *
- * @param selCol - index among selectedColumns
- * @param col - column object to update the state of. prvLength will be
- * set to the new read position
- * @throws IOException
- */
- private void colAdvanceRow(int selCol, SelectedColumn col) throws IOException {
- if (col.runLength > 0) {
- --col.runLength;
- } else {
- int length = (int) WritableUtils.readVLong(colValLenBufferReadIn[selCol]);
- if (length < 0) {
- // we reach a runlength here, use the previous length and reset
- // runlength
- col.runLength = (~length) - 1;
- } else {
- col.prvLength = length;
- col.runLength = 0;
- }
- }
- }
-
- /**
- * Returns true if the previous call to next passed a sync mark.
- */
- public boolean syncSeen() {
- return syncSeen;
- }
-
- /**
- * Returns the last seen sync position.
- */
- public long lastSeenSyncPos() {
- return lastSeenSyncPos;
- }
-
- /**
- * Returns the name of the file.
- */
- @Override
- public String toString() {
- return fragment.getPath().toString();
- }
-
- @Override
- public void reset() throws IOException {
- seek(startOffset);
- }
-
- @Override
- public boolean isProjectable() {
- return true;
- }
-
- @Override
- public boolean isSelectable() {
- return false;
- }
-
- @Override
- public boolean isSplittable() {
- return true;
- }
-
- @Override
- public void close() throws IOException {
- if (tableStats != null) {
- tableStats.setReadBytes(readBytes); //Actual Processed Bytes. (decompressed bytes + header - seek)
- tableStats.setNumRows(passedRowsNum);
- }
-
- IOUtils.cleanup(LOG, in, currentValue);
- if (keyDecompressor != null) {
- // Make sure we only return decompressor once.
- org.apache.tajo.storage.compress.CodecPool.returnDecompressor(keyDecompressor);
- keyDecompressor = null;
- }
- }
- }
-}
http://git-wip-us.apache.org/repos/asf/tajo/blob/4561711f/tajo-storage/src/main/java/org/apache/tajo/storage/rcfile/SchemaAwareCompressionInputStream.java
----------------------------------------------------------------------
diff --git a/tajo-storage/src/main/java/org/apache/tajo/storage/rcfile/SchemaAwareCompressionInputStream.java b/tajo-storage/src/main/java/org/apache/tajo/storage/rcfile/SchemaAwareCompressionInputStream.java
deleted file mode 100644
index 60f1b06..0000000
--- a/tajo-storage/src/main/java/org/apache/tajo/storage/rcfile/SchemaAwareCompressionInputStream.java
+++ /dev/null
@@ -1,43 +0,0 @@
-/**
- * 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.tajo.storage.rcfile;
-
-import org.apache.hadoop.io.compress.CompressionInputStream;
-
-import java.io.InputStream;
-
-/**
- *
- * SchemaAwareCompressionInputStream adds the ability to inform the compression
- * stream what column is being read.
- *
- */
-public abstract class SchemaAwareCompressionInputStream extends CompressionInputStream {
-
- protected SchemaAwareCompressionInputStream(InputStream in) throws java.io.IOException {
- super(in);
- }
-
- /**
- * The column being read
- *
- * @param columnIndex the index of the column. Use -1 for non-column data
- */
- public abstract void setColumnIndex(int columnIndex);
-}
http://git-wip-us.apache.org/repos/asf/tajo/blob/4561711f/tajo-storage/src/main/java/org/apache/tajo/storage/rcfile/SchemaAwareCompressionOutputStream.java
----------------------------------------------------------------------
diff --git a/tajo-storage/src/main/java/org/apache/tajo/storage/rcfile/SchemaAwareCompressionOutputStream.java b/tajo-storage/src/main/java/org/apache/tajo/storage/rcfile/SchemaAwareCompressionOutputStream.java
deleted file mode 100644
index c0ce8b3..0000000
--- a/tajo-storage/src/main/java/org/apache/tajo/storage/rcfile/SchemaAwareCompressionOutputStream.java
+++ /dev/null
@@ -1,44 +0,0 @@
-/**
- * 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.tajo.storage.rcfile;
-
-import org.apache.hadoop.io.compress.CompressionOutputStream;
-
-import java.io.OutputStream;
-
-/**
- *
- * SchemaAwareCompressionOutputStream adds the ability to inform the comression stream
- * the current column being compressed.
- *
- */
-public abstract class SchemaAwareCompressionOutputStream extends CompressionOutputStream {
-
- protected SchemaAwareCompressionOutputStream(OutputStream out) {
- super(out);
- }
-
- /**
- *
- * The column being output
- *
- * @param columnIndex the index of the column. Use -1 for non-column data
- */
- public abstract void setColumnIndex(int columnIndex);
-}
http://git-wip-us.apache.org/repos/asf/tajo/blob/4561711f/tajo-storage/src/main/java/org/apache/tajo/storage/sequencefile/SequenceFileAppender.java
----------------------------------------------------------------------
diff --git a/tajo-storage/src/main/java/org/apache/tajo/storage/sequencefile/SequenceFileAppender.java b/tajo-storage/src/main/java/org/apache/tajo/storage/sequencefile/SequenceFileAppender.java
deleted file mode 100644
index f5cef62..0000000
--- a/tajo-storage/src/main/java/org/apache/tajo/storage/sequencefile/SequenceFileAppender.java
+++ /dev/null
@@ -1,272 +0,0 @@
-/**
- * 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.tajo.storage.sequencefile;
-
-import org.apache.commons.lang.StringEscapeUtils;
-import org.apache.commons.lang.StringUtils;
-import org.apache.commons.logging.Log;
-import org.apache.commons.logging.LogFactory;
-import org.apache.hadoop.conf.Configuration;
-import org.apache.hadoop.fs.FileSystem;
-import org.apache.hadoop.fs.Path;
-import org.apache.hadoop.io.*;
-import org.apache.hadoop.io.SequenceFile.CompressionType;
-import org.apache.hadoop.io.compress.CompressionCodec;
-import org.apache.hadoop.io.compress.CompressionCodecFactory;
-import org.apache.tajo.catalog.Schema;
-import org.apache.tajo.catalog.TableMeta;
-import org.apache.tajo.catalog.proto.CatalogProtos;
-import org.apache.tajo.catalog.statistics.TableStats;
-import org.apache.tajo.conf.TajoConf;
-import org.apache.tajo.datum.Datum;
-import org.apache.tajo.datum.NullDatum;
-import org.apache.tajo.datum.ProtobufDatum;
-import org.apache.tajo.storage.*;
-import org.apache.tajo.storage.exception.AlreadyExistsStorageException;
-import org.apache.tajo.storage.rcfile.NonSyncByteArrayOutputStream;
-import org.apache.tajo.util.BytesUtils;
-
-import java.io.FileNotFoundException;
-import java.io.IOException;
-
-public class SequenceFileAppender extends FileAppender {
- private static final Log LOG = LogFactory.getLog(SequenceFileScanner.class);
-
- private SequenceFile.Writer writer;
-
- private TableMeta meta;
- private Schema schema;
- private TableStatistics stats = null;
-
- private int columnNum;
- private FileSystem fs;
- private char delimiter;
- private byte[] nullChars;
-
- private final static int BUFFER_SIZE = 128 * 1024;
- private long pos = 0;
-
- private CompressionCodecFactory codecFactory;
- private CompressionCodec codec;
-
- private NonSyncByteArrayOutputStream os;
- private SerializerDeserializer serde;
-
- long rowCount;
- private boolean isShuffle;
-
- private Writable EMPTY_KEY;
-
- public SequenceFileAppender(Configuration conf, Schema schema, TableMeta meta, Path path) throws IOException {
- super(conf, schema, meta, path);
- this.meta = meta;
- this.schema = schema;
- }
-
- @Override
- public void init() throws IOException {
- os = new NonSyncByteArrayOutputStream(BUFFER_SIZE);
-
- this.fs = path.getFileSystem(conf);
-
- //determine the intermediate file type
- String store = conf.get(TajoConf.ConfVars.SHUFFLE_FILE_FORMAT.varname,
- TajoConf.ConfVars.SHUFFLE_FILE_FORMAT.defaultVal);
- if (enabledStats && CatalogProtos.StoreType.SEQUENCEFILE == CatalogProtos.StoreType.valueOf(store.toUpperCase())) {
- isShuffle = true;
- } else {
- isShuffle = false;
- }
-
- this.delimiter = StringEscapeUtils.unescapeJava(this.meta.getOption(StorageConstants.SEQUENCEFILE_DELIMITER,
- StorageConstants.DEFAULT_FIELD_DELIMITER)).charAt(0);
- this.columnNum = schema.size();
- String nullCharacters = StringEscapeUtils.unescapeJava(this.meta.getOption(StorageConstants.SEQUENCEFILE_NULL,
- NullDatum.DEFAULT_TEXT));
- if (StringUtils.isEmpty(nullCharacters)) {
- nullChars = NullDatum.get().asTextBytes();
- } else {
- nullChars = nullCharacters.getBytes();
- }
-
- if (!fs.exists(path.getParent())) {
- throw new FileNotFoundException(path.toString());
- }
-
- if(this.meta.containsOption(StorageConstants.COMPRESSION_CODEC)) {
- String codecName = this.meta.getOption(StorageConstants.COMPRESSION_CODEC);
- codecFactory = new CompressionCodecFactory(conf);
- codec = codecFactory.getCodecByClassName(codecName);
- } else {
- if (fs.exists(path)) {
- throw new AlreadyExistsStorageException(path);
- }
- }
-
- try {
- String serdeClass = this.meta.getOption(StorageConstants.SEQUENCEFILE_SERDE,
- TextSerializerDeserializer.class.getName());
- serde = (SerializerDeserializer) Class.forName(serdeClass).newInstance();
- } catch (Exception e) {
- LOG.error(e.getMessage(), e);
- throw new IOException(e);
- }
-
- Class<? extends Writable> keyClass, valueClass;
- if (serde instanceof BinarySerializerDeserializer) {
- keyClass = BytesWritable.class;
- EMPTY_KEY = new BytesWritable();
- valueClass = BytesWritable.class;
- } else {
- keyClass = LongWritable.class;
- EMPTY_KEY = new LongWritable();
- valueClass = Text.class;
- }
-
- String type = this.meta.getOption(StorageConstants.COMPRESSION_TYPE, CompressionType.NONE.name());
- if (type.equals(CompressionType.BLOCK.name())) {
- writer = SequenceFile.createWriter(fs, conf, path, keyClass, valueClass, CompressionType.BLOCK, codec);
- } else if (type.equals(CompressionType.RECORD.name())) {
- writer = SequenceFile.createWriter(fs, conf, path, keyClass, valueClass, CompressionType.RECORD, codec);
- } else {
- writer = SequenceFile.createWriter(fs, conf, path, keyClass, valueClass, CompressionType.NONE, codec);
- }
-
- if (enabledStats) {
- this.stats = new TableStatistics(this.schema);
- }
-
- super.init();
- }
-
- @Override
- public void addTuple(Tuple tuple) throws IOException {
- Datum datum;
-
- if (serde instanceof BinarySerializerDeserializer) {
- byte nullByte = 0;
- int lasti = 0;
- for (int i = 0; i < columnNum; i++) {
- datum = tuple.get(i);
-
- // set bit to 1 if a field is not null
- if (null != datum) {
- nullByte |= 1 << (i % 8);
- }
-
- // write the null byte every eight elements or
- // if this is the last element and serialize the
- // corresponding 8 struct fields at the same time
- if (7 == i % 8 || i == columnNum - 1) {
- os.write(nullByte);
-
- for (int j = lasti; j <= i; j++) {
- datum = tuple.get(j);
-
- switch (schema.getColumn(j).getDataType().getType()) {
- case TEXT:
- BytesUtils.writeVLong(os, datum.asTextBytes().length);
- break;
- case PROTOBUF:
- ProtobufDatum protobufDatum = (ProtobufDatum) datum;
- BytesUtils.writeVLong(os, protobufDatum.asByteArray().length);
- break;
- case CHAR:
- case INET4:
- case BLOB:
- BytesUtils.writeVLong(os, datum.asByteArray().length);
- break;
- default:
- }
-
- serde.serialize(schema.getColumn(j), datum, os, nullChars);
-
- if (isShuffle) {
- // it is to calculate min/max values, and it is only used for the intermediate file.
- stats.analyzeField(j, datum);
- }
- }
- lasti = i + 1;
- nullByte = 0;
- }
- }
-
- BytesWritable b = new BytesWritable();
- b.set(os.getData(), 0, os.getLength());
- writer.append(EMPTY_KEY, b);
-
- } else {
- for (int i = 0; i < columnNum; i++) {
- datum = tuple.get(i);
- serde.serialize(schema.getColumn(i), datum, os, nullChars);
-
- if (columnNum -1 > i) {
- os.write((byte) delimiter);
- }
-
- if (isShuffle) {
- // it is to calculate min/max values, and it is only used for the intermediate file.
- stats.analyzeField(i, datum);
- }
-
- }
- writer.append(EMPTY_KEY, new Text(os.toByteArray()));
- }
-
- os.reset();
- pos += writer.getLength();
- rowCount++;
-
- if (enabledStats) {
- stats.incrementRow();
- }
- }
-
- @Override
- public long getOffset() throws IOException {
- return pos;
- }
-
- @Override
- public void flush() throws IOException {
- os.flush();
- writer.close();
- }
-
- @Override
- public void close() throws IOException {
- // Statistical section
- if (enabledStats) {
- stats.setNumBytes(getOffset());
- }
-
- os.close();
- writer.close();
- }
-
- @Override
- public TableStats getStats() {
- if (enabledStats) {
- return stats.getTableStat();
- } else {
- return null;
- }
- }
-
-}
http://git-wip-us.apache.org/repos/asf/tajo/blob/4561711f/tajo-storage/src/main/java/org/apache/tajo/storage/sequencefile/SequenceFileScanner.java
----------------------------------------------------------------------
diff --git a/tajo-storage/src/main/java/org/apache/tajo/storage/sequencefile/SequenceFileScanner.java b/tajo-storage/src/main/java/org/apache/tajo/storage/sequencefile/SequenceFileScanner.java
deleted file mode 100644
index b0ef67d..0000000
--- a/tajo-storage/src/main/java/org/apache/tajo/storage/sequencefile/SequenceFileScanner.java
+++ /dev/null
@@ -1,336 +0,0 @@
-/**
- * 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.tajo.storage.sequencefile;
-
-import org.apache.commons.lang.StringEscapeUtils;
-import org.apache.commons.lang.StringUtils;
-import org.apache.commons.logging.Log;
-import org.apache.commons.logging.LogFactory;
-import org.apache.hadoop.conf.Configuration;
-import org.apache.hadoop.fs.FileSystem;
-import org.apache.hadoop.io.*;
-import org.apache.tajo.catalog.Column;
-import org.apache.tajo.catalog.Schema;
-import org.apache.tajo.catalog.TableMeta;
-import org.apache.tajo.conf.TajoConf;
-import org.apache.tajo.datum.Datum;
-import org.apache.tajo.datum.NullDatum;
-import org.apache.tajo.storage.*;
-import org.apache.tajo.storage.fragment.FileFragment;
-import org.apache.tajo.util.BytesUtils;
-
-import java.io.IOException;
-
-public class SequenceFileScanner extends FileScanner {
- private static final Log LOG = LogFactory.getLog(SequenceFileScanner.class);
-
- private FileSystem fs;
- private SequenceFile.Reader reader;
- private SerializerDeserializer serde;
- private byte[] nullChars;
- private char delimiter;
-
- private int currentIdx = 0;
- private int[] projectionMap;
-
- private boolean hasBinarySerDe = false;
- private long totalBytes = 0L;
-
- private long start, end;
- private boolean more = true;
-
- /**
- * Whether a field is null or not. Because length is 0 does not means the
- * field is null. In particular, a 0-length string is not null.
- */
- private boolean[] fieldIsNull;
-
- /**
- * The start positions and lengths of fields. Only valid when the data is parsed.
- */
- private int[] fieldStart;
- private int[] fieldLength;
-
- private int elementOffset, elementSize;
-
- private Writable EMPTY_KEY;
-
- public SequenceFileScanner(Configuration conf, Schema schema, TableMeta meta, FileFragment fragment) throws IOException {
- super(conf, schema, meta, fragment);
- }
-
- @Override
- public void init() throws IOException {
- // FileFragment information
- if(fs == null) {
- fs = FileScanner.getFileSystem((TajoConf)conf, fragment.getPath());
- }
-
- reader = new SequenceFile.Reader(fs, fragment.getPath(), conf);
-
- String nullCharacters = StringEscapeUtils.unescapeJava(this.meta.getOption(StorageConstants.SEQUENCEFILE_NULL,
- NullDatum.DEFAULT_TEXT));
- if (StringUtils.isEmpty(nullCharacters)) {
- nullChars = NullDatum.get().asTextBytes();
- } else {
- nullChars = nullCharacters.getBytes();
- }
-
- String delim = meta.getOption(StorageConstants.SEQUENCEFILE_DELIMITER, StorageConstants.DEFAULT_FIELD_DELIMITER);
- this.delimiter = StringEscapeUtils.unescapeJava(delim).charAt(0);
-
- this.start = fragment.getStartKey();
- this.end = start + fragment.getEndKey();
-
- if (fragment.getStartKey() > reader.getPosition())
- reader.sync(this.start);
-
- more = start < end;
-
- if (targets == null) {
- targets = schema.toArray();
- }
-
-
- fieldIsNull = new boolean[schema.getColumns().size()];
- fieldStart = new int[schema.getColumns().size()];
- fieldLength = new int[schema.getColumns().size()];
-
- prepareProjection(targets);
-
- try {
- String serdeClass = this.meta.getOption(StorageConstants.SEQUENCEFILE_SERDE, TextSerializerDeserializer.class.getName());
- serde = (SerializerDeserializer) Class.forName(serdeClass).newInstance();
-
- if (serde instanceof BinarySerializerDeserializer) {
- hasBinarySerDe = true;
- }
-
- Class<? extends Writable> keyClass = (Class<? extends Writable>)Class.forName(reader.getKeyClassName());
- EMPTY_KEY = keyClass.newInstance();
-
- } catch (Exception e) {
- LOG.error(e.getMessage(), e);
- throw new IOException(e);
- }
- super.init();
- }
-
- public Writable getKey() {
- return EMPTY_KEY;
- }
-
- private void prepareProjection(Column [] targets) {
- projectionMap = new int[targets.length];
-
- int tid;
- for (int i = 0; i < targets.length; i++) {
- tid = schema.getColumnId(targets[i].getQualifiedName());
- projectionMap[i] = tid;
- }
- }
-
- @Override
- public Tuple next() throws IOException {
- if (!more) return null;
-
- long pos = reader.getPosition();
- boolean remaining = reader.next(EMPTY_KEY);
-
- if (pos >= end && reader.syncSeen()) {
- more = false;
- } else {
- more = remaining;
- }
-
- if (more) {
- Tuple tuple = null;
- byte[][] cells;
-
- if (hasBinarySerDe) {
- BytesWritable bytesWritable = new BytesWritable();
- reader.getCurrentValue(bytesWritable);
- tuple = makeTuple(bytesWritable);
- totalBytes += (long)bytesWritable.getBytes().length;
- } else {
- Text text = new Text();
- reader.getCurrentValue(text);
- cells = BytesUtils.splitPreserveAllTokens(text.getBytes(), delimiter, projectionMap);
- totalBytes += (long)text.getBytes().length;
- tuple = new LazyTuple(schema, cells, 0, nullChars, serde);
- }
- currentIdx++;
- return tuple;
- } else {
- return null;
- }
- }
-
- /**
- * In hive, LazyBinarySerDe is serialized as follows: start A B A B A B end bytes[] ->
- * |-----|---------|--- ... ---|-----|---------|
- *
- * Section A is one null-byte, corresponding to eight struct fields in Section
- * B. Each bit indicates whether the corresponding field is null (0) or not null
- * (1). Each field is a LazyBinaryObject.
- *
- * Following B, there is another section A and B. This pattern repeats until the
- * all struct fields are serialized.
- *
- * So, tajo must make a tuple after parsing hive style BinarySerDe.
- */
- private Tuple makeTuple(BytesWritable value) throws IOException{
- Tuple tuple = new VTuple(schema.getColumns().size());
-
- int start = 0;
- int length = value.getLength();
-
- /**
- * Please note that one null byte is followed by eight fields, then more
- * null byte and fields.
- */
- int structByteEnd = start + length;
- byte[] bytes = value.getBytes();
-
- byte nullByte = bytes[start];
- int lastFieldByteEnd = start + 1;
-
- // Go through all bytes in the byte[]
- for (int i = 0; i < schema.getColumns().size(); i++) {
- fieldIsNull[i] = true;
- if ((nullByte & (1 << (i % 8))) != 0) {
- fieldIsNull[i] = false;
- parse(schema.getColumn(i), bytes, lastFieldByteEnd);
-
- fieldStart[i] = lastFieldByteEnd + elementOffset;
- fieldLength[i] = elementSize;
- lastFieldByteEnd = fieldStart[i] + fieldLength[i];
-
- for (int j = 0; j < projectionMap.length; j++) {
- if (projectionMap[j] == i) {
- Datum datum = serde.deserialize(schema.getColumn(i), bytes, fieldStart[i], fieldLength[i], nullChars);
- tuple.put(i, datum);
- }
- }
- }
-
- // next byte is a null byte if there are more bytes to go
- if (7 == (i % 8)) {
- if (lastFieldByteEnd < structByteEnd) {
- nullByte = bytes[lastFieldByteEnd];
- lastFieldByteEnd++;
- } else {
- // otherwise all null afterwards
- nullByte = 0;
- lastFieldByteEnd++;
- }
- }
- }
-
- return tuple;
- }
-
- /**
- * Check a particular field and set its size and offset in bytes based on the
- * field type and the bytes arrays.
- *
- * For void, boolean, byte, short, int, long, float and double, there is no
- * offset and the size is fixed. For string, the first four bytes are used to store the size.
- * So the offset is 4 and the size is computed by concating the first four bytes together.
- * The first four bytes are defined with respect to the offset in the bytes arrays.
- *
- * @param col
- * catalog column information
- * @param bytes
- * bytes arrays store the table row
- * @param offset
- * offset of this field
- */
- private void parse(Column col, byte[] bytes, int offset) throws
- IOException {
- switch (col.getDataType().getType()) {
- case BOOLEAN:
- case BIT:
- elementOffset = 0;
- elementSize = 1;
- break;
- case INT2:
- elementOffset = 0;
- elementSize = 2;
- break;
- case INT4:
- case INT8:
- elementOffset = 0;
- elementSize = WritableUtils.decodeVIntSize(bytes[offset]);
- break;
- case FLOAT4:
- elementOffset = 0;
- elementSize = 4;
- break;
- case FLOAT8:
- elementOffset = 0;
- elementSize = 8;
- break;
- case BLOB:
- case PROTOBUF:
- case INET4:
- case CHAR:
- case TEXT:
- elementOffset = 1;
- elementSize = bytes[offset];
- break;
- default:
- elementOffset = 0;
- elementSize = 0;
- }
- }
-
- @Override
- public void reset() throws IOException {
- if (reader != null) {
- reader.sync(0);
- }
- }
-
- @Override
- public void close() throws IOException {
- if (reader != null)
- reader.close();
-
- if (tableStats != null) {
- tableStats.setReadBytes(totalBytes);
- tableStats.setNumRows(currentIdx);
- }
- }
-
- @Override
- public boolean isProjectable() {
- return true;
- }
-
- @Override
- public boolean isSelectable() {
- return true;
- }
-
- @Override
- public boolean isSplittable(){
- return true;
- }
-}