lanyuanxiaoyao/hudi
1
0
Fork 0
Code Activity

1) Separated rollback as a table operation 2) Implement rollback for MOR

Browse Source
This commit is contained in:
Nishith Agarwal
2017-08-17 17:31:55 -07:00
committed by vinoth chandar
parent e1fe3ab937
commit c7d63a7622
28 changed files with 1200 additions and 260 deletions
Download Patch File Download Diff File Expand all files Collapse all files

20
hoodie-common/src/main/java/com/uber/hoodie/common/HoodieRollbackStat.java
View File

@@ -16,10 +16,9 @@
package com.uber.hoodie.common;
import com.uber.hoodie.common.model.HoodieCleaningPolicy;
import com.uber.hoodie.common.table.timeline.HoodieInstant;
import org.apache.hadoop.fs.FileStatus;
import java.io.File;
import java.io.Serializable;
import java.util.List;
import java.util.Map;
@@ -34,12 +33,19 @@ public class HoodieRollbackStat implements Serializable {
private final List<String> successDeleteFiles;
// Files that could not be deleted
private final List<String> failedDeleteFiles;
// Count of HoodieLogFile to commandBlocks written for a particular rollback
private final Map<FileStatus, Long> commandBlocksCount;
public HoodieRollbackStat(String partitionPath, List<String> successDeleteFiles,
List<String> failedDeleteFiles) {
List<String> failedDeleteFiles, Map<FileStatus, Long> commandBlocksCount) {
this.partitionPath = partitionPath;
this.successDeleteFiles = successDeleteFiles;
this.failedDeleteFiles = failedDeleteFiles;
this.commandBlocksCount = commandBlocksCount;
}
public Map<FileStatus, Long> getCommandBlocksCount() {
return commandBlocksCount;
}
public String getPartitionPath() {
@@ -61,6 +67,7 @@ public class HoodieRollbackStat implements Serializable {
public static class Builder {
private List<String> successDeleteFiles;
private List<String> failedDeleteFiles;
private Map<FileStatus, Long> commandBlocksCount;
private String partitionPath;
public Builder withDeletedFileResults(Map<FileStatus, Boolean> deletedFiles) {
@@ -72,13 +79,18 @@ public class HoodieRollbackStat implements Serializable {
return this;
}
public Builder withRollbackBlockAppendResults(Map<FileStatus, Long> commandBlocksCount) {
this.commandBlocksCount = commandBlocksCount;
return this;
}
public Builder withPartitionPath(String partitionPath) {
this.partitionPath = partitionPath;
return this;
}
public HoodieRollbackStat build() {
return new HoodieRollbackStat(partitionPath, successDeleteFiles, failedDeleteFiles);
return new HoodieRollbackStat(partitionPath, successDeleteFiles, failedDeleteFiles, commandBlocksCount);
}
}
}

170
hoodie-common/src/main/java/com/uber/hoodie/common/table/log/HoodieCompactedLogRecordScanner.java
View File

@@ -21,20 +21,12 @@ import com.uber.hoodie.common.model.HoodieAvroPayload;
import com.uber.hoodie.common.model.HoodieKey;
import com.uber.hoodie.common.model.HoodieLogFile;
import com.uber.hoodie.common.model.HoodieRecord;
import com.uber.hoodie.common.table.HoodieTimeline;
import com.uber.hoodie.common.table.log.block.HoodieAvroDataBlock;
import com.uber.hoodie.common.table.log.block.HoodieCommandBlock;
import com.uber.hoodie.common.table.log.block.HoodieCommandBlock.HoodieCommandBlockTypeEnum;
import com.uber.hoodie.common.table.log.block.HoodieDeleteBlock;
import com.uber.hoodie.common.table.log.block.HoodieLogBlock;
import com.uber.hoodie.exception.HoodieIOException;
import java.io.IOException;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import java.util.concurrent.atomic.AtomicLong;
import org.apache.avro.Schema;
import org.apache.avro.generic.GenericRecord;
import org.apache.avro.generic.IndexedRecord;
@@ -43,6 +35,21 @@ import org.apache.hadoop.fs.Path;
import org.apache.log4j.LogManager;
import org.apache.log4j.Logger;
import java.io.IOException;
import java.util.ArrayDeque;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.Deque;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import java.util.concurrent.atomic.AtomicLong;
import static com.uber.hoodie.common.table.log.block.HoodieLogBlock.HoodieLogBlockType.CORRUPT_BLOCK;
import static com.uber.hoodie.common.table.log.block.HoodieLogBlock.LogMetadataType.INSTANT_TIME;
/**
* Scans through all the blocks in a list of HoodieLogFile and builds up a compacted/merged
* list of records which will be used as a lookup table when merging the base columnar file
@@ -63,69 +70,99 @@ public class HoodieCompactedLogRecordScanner implements Iterable<HoodieRecord<Ho
private AtomicLong totalLogRecords = new AtomicLong(0);
// Total final list of compacted/merged records
private long totalRecordsToUpdate;
// Latest valid instant time
private String latestInstantTime;
public HoodieCompactedLogRecordScanner(FileSystem fs, List<String> logFilePaths,
Schema readerSchema) {
Schema readerSchema, String latestInstantTime) {
this.readerSchema = readerSchema;
this.latestInstantTime = latestInstantTime;
// Store only the last log blocks (needed to implement rollback)
Deque<HoodieLogBlock> lastBlocks = new ArrayDeque<>();
// Store merged records for all versions for this log file
Map<String, HoodieRecord<HoodieAvroPayload>> records = Maps.newHashMap();
// iterate over the paths
logFilePaths.stream().map(s -> new HoodieLogFile(new Path(s))).forEach(s -> {
log.info("Scanning log file " + s.getPath());
Iterator<String> logFilePathsItr = logFilePaths.iterator();
while(logFilePathsItr.hasNext()) {
HoodieLogFile logFile = new HoodieLogFile(new Path(logFilePathsItr.next()));
log.info("Scanning log file " + logFile.getPath());
totalLogFiles.incrementAndGet();
try {
// Use the HoodieLogFormatReader to iterate through the blocks in the log file
HoodieLogFormatReader reader = new HoodieLogFormatReader(fs, s, readerSchema);
// Store the records loaded from the last data block (needed to implement rollback)
Map<String, HoodieRecord<HoodieAvroPayload>> recordsFromLastBlock = Maps.newHashMap();
reader.forEachRemaining(r -> {
HoodieLogFormatReader reader = new HoodieLogFormatReader(fs, logFile, readerSchema, true);
while(reader.hasNext()) {
HoodieLogBlock r = reader.next();
String blockInstantTime = r.getLogMetadata().get(INSTANT_TIME);
if(!HoodieTimeline.compareTimestamps(blockInstantTime, this.latestInstantTime,
HoodieTimeline.LESSER_OR_EQUAL)) {
//hit a block with instant time greater than should be processed, stop processing further
break;
}
switch (r.getBlockType()) {
case AVRO_DATA_BLOCK:
log.info("Reading a data block from file " + s.getPath());
log.info("Reading a data block from file " + logFile.getPath());
// If this is a avro data block, then merge the last block records into the main result
merge(records, recordsFromLastBlock);
// Load the merged records into recordsFromLastBlock
HoodieAvroDataBlock dataBlock = (HoodieAvroDataBlock) r;
loadRecordsFromBlock(dataBlock, recordsFromLastBlock);
merge(records, lastBlocks);
// store the last block
lastBlocks.push(r);
break;
case DELETE_BLOCK:
log.info("Reading a delete block from file " + s.getPath());
// This is a delete block, so lets merge any records from previous data block
merge(records, recordsFromLastBlock);
// Delete the keys listed as to be deleted
HoodieDeleteBlock deleteBlock = (HoodieDeleteBlock) r;
Arrays.stream(deleteBlock.getKeysToDelete()).forEach(records::remove);
log.info("Reading a delete block from file " + logFile.getPath());
String lastBlockInstantTime = lastBlocks.peek().getLogMetadata().get(INSTANT_TIME);
if(!lastBlockInstantTime.equals(blockInstantTime)) {
// Block with the keys listed as to be deleted, data and delete blocks written in different batches
// so it is safe to merge
// This is a delete block, so lets merge any records from previous data block
merge(records, lastBlocks);
}
// store deletes so can be rolled back
lastBlocks.push(r);
break;
case COMMAND_BLOCK:
log.info("Reading a command block from file " + s.getPath());
log.info("Reading a command block from file " + logFile.getPath());
// This is a command block - take appropriate action based on the command
HoodieCommandBlock commandBlock = (HoodieCommandBlock) r;
if (commandBlock.getType() == HoodieCommandBlockTypeEnum.ROLLBACK_PREVIOUS_BLOCK) {
log.info("Rolling back the last data block read in " + s.getPath());
// rollback the last read data block
recordsFromLastBlock.clear();
String targetInstantForCommandBlock = r.getLogMetadata().get(HoodieLogBlock.LogMetadataType.TARGET_INSTANT_TIME);
switch (commandBlock.getType()) { // there can be different types of command blocks
case ROLLBACK_PREVIOUS_BLOCK:
// Rollback the last read log block
// Get commit time from last record block, compare with targetCommitTime, rollback only if equal,
// this is required in scenarios of invalid/extra rollback blocks written due to failures during
// the rollback operation itself
HoodieLogBlock lastBlock = lastBlocks.peek();
if (lastBlock != null && lastBlock.getBlockType() != CORRUPT_BLOCK &&
targetInstantForCommandBlock.contentEquals(lastBlock.getLogMetadata().get(INSTANT_TIME))) {
log.info("Rolling back the last log block read in " + logFile.getPath());
lastBlocks.pop();
} else if(lastBlock != null && lastBlock.getBlockType() == CORRUPT_BLOCK) {
// handle corrupt blocks separately since they may not have metadata
log.info("Rolling back the last corrupted log block read in " + logFile.getPath());
lastBlocks.pop();
}
else {
log.warn("Invalid or extra rollback command block in " + logFile.getPath());
}
break;
}
break;
case CORRUPT_BLOCK:
log.info("Found a corrupt block in " + s.getPath());
log.info("Found a corrupt block in " + logFile.getPath());
// If there is a corrupt block - we will assume that this was the next data block
// so merge the last block records (TODO - handle when the corrupted block was a tombstone written partially?)
merge(records, recordsFromLastBlock);
recordsFromLastBlock.clear();
lastBlocks.push(r);
break;
}
});
// merge the last read block when all the blocks are done reading
if (!recordsFromLastBlock.isEmpty()) {
log.info("Merging the final data block in " + s.getPath());
merge(records, recordsFromLastBlock);
}
} catch (IOException e) {
throw new HoodieIOException("IOException when reading log file " + s);
throw new HoodieIOException("IOException when reading log file " + logFile);
}
});
// merge the last read block when all the blocks are done reading
if(!lastBlocks.isEmpty()) {
log.info("Merging the final data blocks in " + logFile.getPath());
merge(records, lastBlocks);
}
}
this.logRecords = Collections.unmodifiableCollection(records.values());
this.totalRecordsToUpdate = records.size();
}
@@ -135,17 +172,14 @@ public class HoodieCompactedLogRecordScanner implements Iterable<HoodieRecord<Ho
* and merge with the HoodieAvroPayload if the same key was found before
*
* @param dataBlock
* @param recordsFromLastBlock
*/
private void loadRecordsFromBlock(
HoodieAvroDataBlock dataBlock,
Map<String, HoodieRecord<HoodieAvroPayload>> recordsFromLastBlock) {
recordsFromLastBlock.clear();
private Map<String, HoodieRecord<HoodieAvroPayload>> loadRecordsFromBlock(HoodieAvroDataBlock dataBlock) {
Map<String, HoodieRecord<HoodieAvroPayload>> recordsFromLastBlock = Maps.newHashMap();
List<IndexedRecord> recs = dataBlock.getRecords();
totalLogRecords.addAndGet(recs.size());
recs.forEach(rec -> {
String key = ((GenericRecord) rec).get(HoodieRecord.RECORD_KEY_METADATA_FIELD)
.toString();
.toString();
String partitionPath =
((GenericRecord) rec).get(HoodieRecord.PARTITION_PATH_METADATA_FIELD)
.toString();
@@ -155,15 +189,39 @@ public class HoodieCompactedLogRecordScanner implements Iterable<HoodieRecord<Ho
if (recordsFromLastBlock.containsKey(key)) {
// Merge and store the merged record
HoodieAvroPayload combinedValue = recordsFromLastBlock.get(key).getData()
.preCombine(hoodieRecord.getData());
.preCombine(hoodieRecord.getData());
recordsFromLastBlock
.put(key, new HoodieRecord<>(new HoodieKey(key, hoodieRecord.getPartitionPath()),
combinedValue));
.put(key, new HoodieRecord<>(new HoodieKey(key, hoodieRecord.getPartitionPath()),
combinedValue));
} else {
// Put the record as is
recordsFromLastBlock.put(key, hoodieRecord);
}
});
return recordsFromLastBlock;
}
/**
* Merge the last seen log blocks with the accumulated records
*
* @param records
* @param lastBlocks
*/
private void merge(Map<String, HoodieRecord<HoodieAvroPayload>> records,
Deque<HoodieLogBlock> lastBlocks) {
while (!lastBlocks.isEmpty()) {
HoodieLogBlock lastBlock = lastBlocks.pop();
switch (lastBlock.getBlockType()) {
case AVRO_DATA_BLOCK:
merge(records, loadRecordsFromBlock((HoodieAvroDataBlock) lastBlock));
break;
case DELETE_BLOCK:
Arrays.stream(((HoodieDeleteBlock) lastBlock).getKeysToDelete()).forEach(records::remove);
break;
case CORRUPT_BLOCK:
break;
}
}
}
/**
@@ -178,9 +236,9 @@ public class HoodieCompactedLogRecordScanner implements Iterable<HoodieRecord<Ho
if (records.containsKey(key)) {
// Merge and store the merged record
HoodieAvroPayload combinedValue = records.get(key).getData()
.preCombine(hoodieRecord.getData());
.preCombine(hoodieRecord.getData());
records.put(key, new HoodieRecord<>(new HoodieKey(key, hoodieRecord.getPartitionPath()),
combinedValue));
combinedValue));
} else {
// Put the record as is
records.put(key, hoodieRecord);

4
hoodie-common/src/main/java/com/uber/hoodie/common/table/log/HoodieLogFormat.java
View File

@@ -187,8 +187,8 @@ public interface HoodieLogFormat {
return new WriterBuilder();
}
static HoodieLogFormat.Reader newReader(FileSystem fs, HoodieLogFile logFile, Schema readerSchema)
static HoodieLogFormat.Reader newReader(FileSystem fs, HoodieLogFile logFile, Schema readerSchema, boolean readMetadata)
throws IOException {
return new HoodieLogFormatReader(fs, logFile, readerSchema);
return new HoodieLogFormatReader(fs, logFile, readerSchema, readMetadata);
}
}

16
hoodie-common/src/main/java/com/uber/hoodie/common/table/log/HoodieLogFormatReader.java
View File

@@ -51,15 +51,17 @@ public class HoodieLogFormatReader implements HoodieLogFormat.Reader {
private static final byte[] magicBuffer = new byte[4];
private final Schema readerSchema;
private HoodieLogBlock nextBlock = null;
private boolean readMetadata = true;
HoodieLogFormatReader(FileSystem fs, HoodieLogFile logFile, Schema readerSchema, int bufferSize) throws IOException {
HoodieLogFormatReader(FileSystem fs, HoodieLogFile logFile, Schema readerSchema, int bufferSize, boolean readMetadata) throws IOException {
this.inputStream = fs.open(logFile.getPath(), bufferSize);
this.logFile = logFile;
this.readerSchema = readerSchema;
this.readMetadata = readMetadata;
}
HoodieLogFormatReader(FileSystem fs, HoodieLogFile logFile, Schema readerSchema) throws IOException {
this(fs, logFile, readerSchema, DEFAULT_BUFFER_SIZE);
HoodieLogFormatReader(FileSystem fs, HoodieLogFile logFile, Schema readerSchema, boolean readMetadata) throws IOException {
this(fs, logFile, readerSchema, DEFAULT_BUFFER_SIZE, readMetadata);
}
@Override
@@ -93,11 +95,11 @@ public class HoodieLogFormatReader implements HoodieLogFormat.Reader {
switch (blockType) {
// based on type read the block
case AVRO_DATA_BLOCK:
return HoodieAvroDataBlock.fromBytes(content, readerSchema);
return HoodieAvroDataBlock.fromBytes(content, readerSchema, readMetadata);
case DELETE_BLOCK:
return HoodieDeleteBlock.fromBytes(content);
return HoodieDeleteBlock.fromBytes(content, readMetadata);
case COMMAND_BLOCK:
return HoodieCommandBlock.fromBytes(content);
return HoodieCommandBlock.fromBytes(content, readMetadata);
default:
throw new HoodieNotSupportedException("Unsupported Block " + blockType);
}
@@ -113,7 +115,7 @@ public class HoodieLogFormatReader implements HoodieLogFormat.Reader {
int corruptedBlockSize = (int) (nextBlockOffset - currentPos);
byte[] content = new byte[corruptedBlockSize];
inputStream.readFully(content, 0, corruptedBlockSize);
return HoodieCorruptBlock.fromBytes(content);
return HoodieCorruptBlock.fromBytes(content, corruptedBlockSize, true);
}
private boolean isBlockCorrupt(int blocksize) throws IOException {

49
hoodie-common/src/main/java/com/uber/hoodie/common/table/log/block/HoodieAvroDataBlock.java
View File

@@ -18,13 +18,6 @@ package com.uber.hoodie.common.table.log.block;
import com.uber.hoodie.common.util.HoodieAvroUtils;
import com.uber.hoodie.exception.HoodieIOException;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import org.apache.avro.Schema;
import org.apache.avro.generic.GenericDatumReader;
import org.apache.avro.generic.GenericDatumWriter;
@@ -34,6 +27,15 @@ import org.apache.avro.io.DecoderFactory;
import org.apache.avro.io.Encoder;
import org.apache.avro.io.EncoderFactory;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
/**
* DataBlock contains a list of records serialized using Avro.
* The Datablock contains
@@ -43,16 +45,21 @@ import org.apache.avro.io.EncoderFactory;
* 4. Size of a record
* 5. Actual avro serialized content of the record
*/
public class HoodieAvroDataBlock implements HoodieLogBlock {
public class HoodieAvroDataBlock extends HoodieLogBlock {
private List<IndexedRecord> records;
private Schema schema;
public HoodieAvroDataBlock(List<IndexedRecord> records, Schema schema) {
public HoodieAvroDataBlock(List<IndexedRecord> records, Schema schema, Map<LogMetadataType, String> metadata) {
super(metadata);
this.records = records;
this.schema = schema;
}
public HoodieAvroDataBlock(List<IndexedRecord> records, Schema schema) {
this(records, schema, null);
}
public List<IndexedRecord> getRecords() {
return records;
}
@@ -63,19 +70,25 @@ public class HoodieAvroDataBlock implements HoodieLogBlock {
@Override
public byte[] getBytes() throws IOException {
GenericDatumWriter<IndexedRecord> writer = new GenericDatumWriter<>(schema);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
DataOutputStream output = new DataOutputStream(baos);
// 1. Compress and Write schema out
// 1. Write out metadata
if(super.getLogMetadata() != null) {
output.write(HoodieLogBlock.getLogMetadataBytes(super.getLogMetadata()));
}
// 2. Compress and Write schema out
byte[] schemaContent = HoodieAvroUtils.compress(schema.toString());
output.writeInt(schemaContent.length);
output.write(schemaContent);
// 2. Write total number of records
// 3. Write total number of records
output.writeInt(records.size());
// 3. Write the records
// 4. Write the records
records.forEach(s -> {
ByteArrayOutputStream temp = new ByteArrayOutputStream();
Encoder encoder = EncoderFactory.get().binaryEncoder(temp, null);
@@ -104,9 +117,15 @@ public class HoodieAvroDataBlock implements HoodieLogBlock {
return HoodieLogBlockType.AVRO_DATA_BLOCK;
}
public static HoodieLogBlock fromBytes(byte[] content, Schema readerSchema) throws IOException {
// 1. Read the schema written out
public static HoodieLogBlock fromBytes(byte[] content, Schema readerSchema, boolean readMetadata) throws IOException {
DataInputStream dis = new DataInputStream(new ByteArrayInputStream(content));
Map<LogMetadataType, String> metadata = null;
// 1. Read the metadata written out, if applicable
if(readMetadata) {
metadata = HoodieLogBlock.getLogMetadata(dis);
}
// 1. Read the schema written out
int schemaLength = dis.readInt();
byte[] compressedSchema = new byte[schemaLength];
dis.readFully(compressedSchema, 0, schemaLength);
@@ -133,6 +152,6 @@ public class HoodieAvroDataBlock implements HoodieLogBlock {
}
dis.close();
return new HoodieAvroDataBlock(records, readerSchema);
return new HoodieAvroDataBlock(records, readerSchema, metadata);
}
}

36
hoodie-common/src/main/java/com/uber/hoodie/common/table/log/block/HoodieCommandBlock.java
View File

@@ -16,25 +16,42 @@
package com.uber.hoodie.common.table.log.block;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.util.Map;
/**
* Command block issues a specific command to the scanner
*/
public class HoodieCommandBlock implements HoodieLogBlock {
public class HoodieCommandBlock extends HoodieLogBlock {
private final HoodieCommandBlockTypeEnum type;
public enum HoodieCommandBlockTypeEnum {ROLLBACK_PREVIOUS_BLOCK}
public HoodieCommandBlock(HoodieCommandBlockTypeEnum type) {
public HoodieCommandBlock(HoodieCommandBlockTypeEnum type, Map<LogMetadataType, String> metadata) {
super(metadata);
this.type = type;
}
public HoodieCommandBlock(HoodieCommandBlockTypeEnum type) {
this(type, null);
}
@Override
public byte[] getBytes() throws IOException {
return ByteBuffer.allocate(4).putInt(type.ordinal()).array();
ByteArrayOutputStream baos = new ByteArrayOutputStream();
DataOutputStream output = new DataOutputStream(baos);
if(super.getLogMetadata() != null) {
output.write(HoodieLogBlock.getLogMetadataBytes(super.getLogMetadata()));
}
output.writeInt(type.ordinal());
output.close();
return baos.toByteArray();
}
public HoodieCommandBlockTypeEnum getType() {
@@ -46,8 +63,13 @@ public class HoodieCommandBlock implements HoodieLogBlock {
return HoodieLogBlockType.COMMAND_BLOCK;
}
public static HoodieLogBlock fromBytes(byte[] content) {
int ordinal = ByteBuffer.wrap(content).getInt();
return new HoodieCommandBlock(HoodieCommandBlockTypeEnum.values()[ordinal]);
public static HoodieLogBlock fromBytes(byte[] content, boolean readMetadata) throws IOException {
DataInputStream dis = new DataInputStream(new ByteArrayInputStream(content));
Map<LogMetadataType, String> metadata = null;
if(readMetadata) {
metadata = HoodieLogBlock.getLogMetadata(dis);
}
int ordinal = dis.readInt();
return new HoodieCommandBlock(HoodieCommandBlockTypeEnum.values()[ordinal], metadata);
}
}

44
hoodie-common/src/main/java/com/uber/hoodie/common/table/log/block/HoodieCorruptBlock.java
View File

@@ -16,23 +16,39 @@
package com.uber.hoodie.common.table.log.block;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.util.Map;
/**
* Corrupt block is emitted whenever the scanner finds the length of the block written at the
* beginning does not match (did not find a EOF or a sync marker after the length)
*/
public class HoodieCorruptBlock implements HoodieLogBlock {
public class HoodieCorruptBlock extends HoodieLogBlock {
private final byte[] corruptedBytes;
private HoodieCorruptBlock(byte[] corruptedBytes) {
private HoodieCorruptBlock(byte[] corruptedBytes, Map<LogMetadataType, String> metadata) {
super(metadata);
this.corruptedBytes = corruptedBytes;
}
private HoodieCorruptBlock(byte[] corruptedBytes) {
this(corruptedBytes, null);
}
@Override
public byte[] getBytes() throws IOException {
return corruptedBytes;
ByteArrayOutputStream baos = new ByteArrayOutputStream();
DataOutputStream output = new DataOutputStream(baos);
if(super.getLogMetadata() != null) {
output.write(HoodieLogBlock.getLogMetadataBytes(super.getLogMetadata()));
}
output.write(corruptedBytes);
return baos.toByteArray();
}
@Override
@@ -40,7 +56,25 @@ public class HoodieCorruptBlock implements HoodieLogBlock {
return HoodieLogBlockType.CORRUPT_BLOCK;
}
public static HoodieLogBlock fromBytes(byte[] content) {
return new HoodieCorruptBlock(content);
public byte[] getCorruptedBytes() {
return corruptedBytes;
}
public static HoodieLogBlock fromBytes(byte[] content, int blockSize, boolean readMetadata) throws IOException {
DataInputStream dis = new DataInputStream(new ByteArrayInputStream(content));
Map<LogMetadataType, String> metadata = null;
int bytesRemaining = blockSize;
if(readMetadata) {
try { //attempt to read metadata
metadata = HoodieLogBlock.getLogMetadata(dis);
bytesRemaining = blockSize - HoodieLogBlock.getLogMetadataBytes(metadata).length;
} catch(IOException e) {
// unable to read metadata, possibly corrupted
metadata = null;
}
}
byte [] corruptedBytes = new byte[bytesRemaining];
dis.readFully(corruptedBytes);
return new HoodieCorruptBlock(corruptedBytes, metadata);
}
}

39
hoodie-common/src/main/java/com/uber/hoodie/common/table/log/block/HoodieDeleteBlock.java
View File

@@ -16,24 +16,43 @@
package com.uber.hoodie.common.table.log.block;
import org.apache.commons.lang3.StringUtils;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.nio.charset.Charset;
import org.apache.commons.lang3.StringUtils;
import java.util.Map;
/**
* Delete block contains a list of keys to be deleted from scanning the blocks so far
*/
public class HoodieDeleteBlock implements HoodieLogBlock {
public class HoodieDeleteBlock extends HoodieLogBlock {
private final String[] keysToDelete;
public HoodieDeleteBlock(String[] keysToDelete) {
public HoodieDeleteBlock(String[] keysToDelete, Map<LogMetadataType, String> metadata) {
super(metadata);
this.keysToDelete = keysToDelete;
}
public HoodieDeleteBlock(String[] keysToDelete) {
this(keysToDelete, null);
}
@Override
public byte[] getBytes() throws IOException {
return StringUtils.join(keysToDelete, ',').getBytes(Charset.forName("utf-8"));
ByteArrayOutputStream baos = new ByteArrayOutputStream();
DataOutputStream output = new DataOutputStream(baos);
if(super.getLogMetadata() != null) {
output.write(HoodieLogBlock.getLogMetadataBytes(super.getLogMetadata()));
}
byte [] bytesToWrite = StringUtils.join(keysToDelete, ',').getBytes(Charset.forName("utf-8"));
output.writeInt(bytesToWrite.length);
output.write(bytesToWrite);
return baos.toByteArray();
}
public String[] getKeysToDelete() {
@@ -45,7 +64,15 @@ public class HoodieDeleteBlock implements HoodieLogBlock {
return HoodieLogBlockType.DELETE_BLOCK;
}
public static HoodieLogBlock fromBytes(byte[] content) {
return new HoodieDeleteBlock(new String(content).split(","));
public static HoodieLogBlock fromBytes(byte[] content, boolean readMetadata) throws IOException {
DataInputStream dis = new DataInputStream(new ByteArrayInputStream(content));
Map<LogMetadataType, String> metadata = null;
if(readMetadata) {
metadata = HoodieLogBlock.getLogMetadata(dis);
}
int dataLength = dis.readInt();
byte [] data = new byte[dataLength];
dis.readFully(data);
return new HoodieDeleteBlock(new String(data).split(","), metadata);
}
}

92
hoodie-common/src/main/java/com/uber/hoodie/common/table/log/block/HoodieLogBlock.java
View File

@@ -16,23 +16,105 @@
package com.uber.hoodie.common.table.log.block;
import com.google.common.collect.Maps;
import com.uber.hoodie.exception.HoodieException;
import java.io.ByteArrayOutputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.EOFException;
import java.io.IOException;
import java.util.Map;
/**
* Abstract interface defining a block in HoodieLogFile
* Abstract class defining a block in HoodieLogFile
*/
public interface HoodieLogBlock {
byte[] getBytes() throws IOException;
HoodieLogBlockType getBlockType();
public abstract class HoodieLogBlock {
public byte[] getBytes() throws IOException {
throw new HoodieException("No implementation was provided");
}
public HoodieLogBlockType getBlockType() {
throw new HoodieException("No implementation was provided");
}
//log metadata for each log block
private Map<LogMetadataType, String> logMetadata;
/**
* Type of the log block
* WARNING: This enum is serialized as the ordinal. Only add new enums at the end.
*/
enum HoodieLogBlockType {
public enum HoodieLogBlockType {
COMMAND_BLOCK,
DELETE_BLOCK,
CORRUPT_BLOCK,
AVRO_DATA_BLOCK
}
/**
* Metadata abstraction for a HoodieLogBlock
* WARNING : This enum is serialized as the ordinal. Only add new enums at the end.
*/
public enum LogMetadataType {
INSTANT_TIME,
TARGET_INSTANT_TIME;
}
public HoodieLogBlock(Map<LogMetadataType, String> logMetadata) {
this.logMetadata = logMetadata;
}
public Map<LogMetadataType, String> getLogMetadata() {
return logMetadata;
}
/**
* Convert log metadata to bytes
* 1. Write size of metadata
* 2. Write enum ordinal
* 3. Write actual bytes
* @param metadata
* @return
* @throws IOException
*/
public static byte [] getLogMetadataBytes(Map<LogMetadataType, String> metadata) throws IOException {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
DataOutputStream output = new DataOutputStream(baos);
output.writeInt(metadata.size());
for(Map.Entry<LogMetadataType, String> entry : metadata.entrySet()) {
output.writeInt(entry.getKey().ordinal());
byte [] bytes = entry.getValue().getBytes();
output.writeInt(bytes.length);
output.write(bytes);
}
return baos.toByteArray();
}
/**
* Convert bytes to LogMetadata, follow the same order as
* {@link HoodieLogBlock#getLogMetadataBytes}
* @param dis
* @return
* @throws IOException
*/
public static Map<LogMetadataType, String> getLogMetadata(DataInputStream dis) throws IOException {
Map<LogMetadataType, String> metadata = Maps.newHashMap();
// 1. Read the metadata written out
int metadataCount = dis.readInt();
try {
while (metadataCount > 0) {
int metadataEntryIndex = dis.readInt();
int metadataEntrySize = dis.readInt();
byte[] metadataEntry = new byte[metadataEntrySize];
dis.readFully(metadataEntry, 0, metadataEntrySize);
metadata.put(LogMetadataType.values()[metadataEntryIndex], new String(metadataEntry));
metadataCount--;
}
return metadata;
} catch(EOFException eof) {
throw new IOException("Could not read metadata fields ", eof);
}
}
}

5
hoodie-common/src/main/java/com/uber/hoodie/common/table/timeline/HoodieActiveTimeline.java
View File

@@ -256,7 +256,6 @@ public class HoodieActiveTimeline extends HoodieDefaultTimeline {
return readDataFromPath(detailPath);
}
protected void moveInflightToComplete(HoodieInstant inflight, HoodieInstant completed,
Optional<byte[]> data) {
Path commitFilePath = new Path(metaPath, completed.getFileName());
@@ -290,6 +289,10 @@ public class HoodieActiveTimeline extends HoodieDefaultTimeline {
}
}
public void saveToInflight(HoodieInstant instant, Optional<byte[]> content) {
createFileInMetaPath(instant.getFileName(), content);
}
protected void createFileInMetaPath(String filename, Optional<byte[]> content) {
Path fullPath = new Path(metaPath, filename);
try {