| /* |
| * 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.carbondata.core.index; |
| |
| import java.io.DataInput; |
| import java.io.DataOutput; |
| import java.io.IOException; |
| import java.io.Serializable; |
| import java.util.ArrayList; |
| import java.util.HashSet; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Objects; |
| import java.util.Set; |
| |
| import org.apache.carbondata.core.metadata.schema.table.Writable; |
| import org.apache.carbondata.core.mutate.UpdateVO; |
| import org.apache.carbondata.core.readcommitter.ReadCommittedScope; |
| import org.apache.carbondata.core.segmentmeta.SegmentMetaDataInfo; |
| import org.apache.carbondata.core.statusmanager.LoadMetadataDetails; |
| import org.apache.carbondata.core.statusmanager.SegmentRefreshInfo; |
| import org.apache.carbondata.core.statusmanager.SegmentStatusManager; |
| import org.apache.carbondata.core.util.path.CarbonTablePath; |
| |
| import org.apache.hadoop.conf.Configuration; |
| |
| /** |
| * Represents one load of carbondata |
| */ |
| public class Segment implements Serializable, Writable { |
| |
| private static final long serialVersionUID = 7044555408162234064L; |
| |
| private String segmentNo; |
| |
| private String segmentFileName; |
| |
| /** |
| * List of index shards which are already got filtered through CG index operation. |
| */ |
| private Set<String> filteredIndexShardNames = new HashSet<>(); |
| |
| /** |
| * Points to the Read Committed Scope of the segment. This is a flavor of |
| * transactional isolation level which only allows snapshot read of the |
| * data and make non committed data invisible to the reader. |
| */ |
| private transient ReadCommittedScope readCommittedScope; |
| |
| /** |
| * keeps all the details about segments |
| */ |
| private transient LoadMetadataDetails loadMetadataDetails; |
| |
| private String segmentString; |
| |
| private long indexSize = 0; |
| |
| /** |
| * Whether to cache the segment indexes in executors or not. |
| */ |
| private boolean isCacheable = true; |
| |
| /** |
| * Path of segment where it exists |
| */ |
| private transient String segmentPath; |
| |
| /** |
| * Properties of the segment. |
| */ |
| private transient Map<String, String> options; |
| |
| /** |
| * Segment metadata info |
| */ |
| private SegmentMetaDataInfo segmentMetaDataInfo; |
| |
| public Segment() { |
| |
| } |
| |
| public Segment(String segmentNo) { |
| this.segmentNo = segmentNo; |
| } |
| |
| public Segment(String segmentNo, ReadCommittedScope readCommittedScope) { |
| this.segmentNo = segmentNo; |
| this.readCommittedScope = readCommittedScope; |
| segmentString = segmentNo; |
| } |
| |
| /** |
| * ReadCommittedScope will be null. So getCommittedIndexFile will not work and will throw |
| * a NullPointerException. In case getCommittedIndexFile is need to be accessed then |
| * use the other constructor and pass proper ReadCommittedScope. |
| * @param segmentNo |
| * @param segmentFileName |
| */ |
| public Segment(String segmentNo, String segmentFileName) { |
| this.segmentNo = segmentNo; |
| this.segmentFileName = segmentFileName; |
| this.readCommittedScope = null; |
| if (segmentFileName != null) { |
| segmentString = segmentNo + "#" + segmentFileName; |
| } else { |
| segmentString = segmentNo; |
| } |
| } |
| |
| public Segment(String segmentNo, String segmentFileName, String segmentPath, |
| Map<String, String> options) { |
| this(segmentNo, segmentFileName); |
| this.segmentPath = segmentPath; |
| this.options = options; |
| } |
| |
| public void setSegmentFileName(String segmentFileName) { |
| this.segmentFileName = segmentFileName; |
| } |
| |
| /** |
| * |
| * @param segmentNo |
| * @param segmentFileName |
| * @param readCommittedScope |
| */ |
| public Segment(String segmentNo, String segmentFileName, ReadCommittedScope readCommittedScope) { |
| this.segmentNo = segmentNo; |
| this.segmentFileName = segmentFileName; |
| this.readCommittedScope = readCommittedScope; |
| if (segmentFileName != null) { |
| segmentString = segmentNo + "#" + segmentFileName; |
| } else { |
| segmentString = segmentNo; |
| } |
| } |
| |
| /** |
| * @param segmentNo |
| * @param segmentFileName |
| * @param readCommittedScope |
| */ |
| public Segment(String segmentNo, String segmentFileName, ReadCommittedScope readCommittedScope, |
| LoadMetadataDetails loadMetadataDetails) { |
| this.segmentNo = segmentNo; |
| this.segmentFileName = segmentFileName; |
| this.readCommittedScope = readCommittedScope; |
| this.loadMetadataDetails = loadMetadataDetails; |
| if (loadMetadataDetails.getIndexSize() != null) { |
| this.indexSize = Long.parseLong(loadMetadataDetails.getIndexSize()); |
| } |
| if (segmentFileName != null) { |
| segmentString = segmentNo + "#" + segmentFileName; |
| } else { |
| segmentString = segmentNo; |
| } |
| } |
| |
| /** |
| * |
| * @return map of Absolute path of index file as key and null as value -- without mergeIndex |
| * map of AbsolutePath with fileName of MergeIndex parent file as key and mergeIndexFileName |
| * as value -- with mergeIndex |
| * @throws IOException |
| */ |
| public Map<String, String> getCommittedIndexFile() throws IOException { |
| return readCommittedScope.getCommittedIndexFile(this); |
| } |
| |
| public SegmentRefreshInfo getSegmentRefreshInfo(UpdateVO updateVo) { |
| return readCommittedScope.getCommittedSegmentRefreshInfo(this, updateVo); |
| } |
| |
| public String getSegmentNo() { |
| return segmentNo; |
| } |
| |
| public String getSegmentFileName() { |
| return segmentFileName; |
| } |
| |
| public void setReadCommittedScope(ReadCommittedScope readCommittedScope) { |
| this.readCommittedScope = readCommittedScope; |
| } |
| |
| public ReadCommittedScope getReadCommittedScope() { |
| return readCommittedScope; |
| } |
| |
| public static List<Segment> toSegmentList(String[] segmentIds, |
| ReadCommittedScope readCommittedScope) { |
| List<Segment> list = new ArrayList<>(segmentIds.length); |
| for (String segmentId : segmentIds) { |
| list.add(toSegment(segmentId, readCommittedScope)); |
| } |
| return list; |
| } |
| |
| public static List<Segment> toSegmentList(List<String> segmentIds, |
| ReadCommittedScope readCommittedScope) { |
| List<Segment> list = new ArrayList<>(segmentIds.size()); |
| for (String segmentId : segmentIds) { |
| list.add(toSegment(segmentId, readCommittedScope)); |
| } |
| return list; |
| } |
| |
| /** |
| * readCommittedScope provide Read Snapshot isolation. |
| * @param segmentId |
| * @param readCommittedScope |
| * @return |
| */ |
| public static Segment toSegment(String segmentId, ReadCommittedScope readCommittedScope) { |
| // SegmentId can be combination of segmentNo and segmentFileName. |
| String[] split = segmentId.split("#"); |
| if (split.length > 1) { |
| return new Segment(split[0], split[1], readCommittedScope); |
| } else if (split.length > 0) { |
| return new Segment(split[0], null, readCommittedScope); |
| } |
| return new Segment(segmentId, null, readCommittedScope); |
| } |
| |
| /** |
| * Converts to segment object |
| * @param segmentId |
| * @return |
| */ |
| public static Segment toSegment(String segmentId) { |
| // SegmentId can be combination of segmentNo and segmentFileName. |
| return toSegment(segmentId, null); |
| } |
| |
| /** |
| * Read the table status and get the segment corresponding to segmentNo |
| * @param segmentNo |
| * @param tablePath |
| * @return |
| */ |
| public static Segment getSegment(String segmentNo, String tablePath) { |
| LoadMetadataDetails[] loadMetadataDetails = |
| SegmentStatusManager.readLoadMetadata(CarbonTablePath.getMetadataPath(tablePath)); |
| return getSegment(segmentNo, loadMetadataDetails); |
| } |
| |
| /** |
| * Get the segment object corresponding to segmentNo |
| * @param segmentNo |
| * @param loadMetadataDetails |
| * @return |
| */ |
| public static Segment getSegment(String segmentNo, LoadMetadataDetails[] loadMetadataDetails) { |
| for (LoadMetadataDetails details: loadMetadataDetails) { |
| if (details.getLoadName().equals(segmentNo)) { |
| return new Segment(details.getLoadName(), details.getSegmentFile()); |
| } |
| } |
| return null; |
| } |
| |
| public Configuration getConfiguration() { |
| return readCommittedScope.getConfiguration(); |
| } |
| |
| public Set<String> getFilteredIndexShardNames() { |
| return filteredIndexShardNames; |
| } |
| |
| public void setFilteredIndexShardNames(Set<String> filteredIndexShardNames) { |
| this.filteredIndexShardNames = filteredIndexShardNames; |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| if (this == o) return true; |
| if (o == null || getClass() != o.getClass()) return false; |
| Segment segment = (Segment) o; |
| return Objects.equals(segmentNo, segment.segmentNo); |
| } |
| |
| @Override |
| public int hashCode() { |
| return Objects.hash(segmentNo); |
| } |
| |
| @Override |
| public String toString() { |
| return segmentString; |
| } |
| |
| public LoadMetadataDetails getLoadMetadataDetails() { |
| return loadMetadataDetails; |
| } |
| |
| public void setLoadMetadataDetails(LoadMetadataDetails loadMetadataDetails) { |
| this.loadMetadataDetails = loadMetadataDetails; |
| } |
| |
| public long getIndexSize() { |
| return indexSize; |
| } |
| |
| public void setIndexSize(long indexSize) { |
| this.indexSize = indexSize; |
| } |
| |
| public boolean isCacheable() { |
| return isCacheable; |
| } |
| |
| public void setCacheable(boolean cacheable) { |
| isCacheable = cacheable; |
| } |
| |
| public String getSegmentPath() { |
| if (segmentPath == null) { |
| if (loadMetadataDetails != null) { |
| segmentPath = loadMetadataDetails.getPath(); |
| } |
| } |
| return segmentPath; |
| } |
| |
| public Map<String, String> getOptions() { |
| return options; |
| } |
| |
| public void setOptions(Map<String, String> options) { |
| this.options = options; |
| } |
| |
| public boolean isCarbonSegment() { |
| if (loadMetadataDetails != null) { |
| return loadMetadataDetails.isCarbonFormat(); |
| } |
| return true; |
| } |
| |
| @Override |
| public void write(DataOutput out) throws IOException { |
| out.writeUTF(segmentNo); |
| boolean writeSegmentFileName = segmentFileName != null; |
| out.writeBoolean(writeSegmentFileName); |
| if (writeSegmentFileName) { |
| out.writeUTF(segmentFileName); |
| } |
| out.writeInt(filteredIndexShardNames.size()); |
| for (String name: filteredIndexShardNames) { |
| out.writeUTF(name); |
| } |
| if (segmentString == null) { |
| out.writeBoolean(false); |
| } else { |
| out.writeBoolean(true); |
| out.writeUTF(segmentString); |
| } |
| out.writeLong(indexSize); |
| } |
| |
| @Override |
| public void readFields(DataInput in) throws IOException { |
| this.segmentNo = in.readUTF(); |
| if (in.readBoolean()) { |
| this.segmentFileName = in.readUTF(); |
| } |
| filteredIndexShardNames = new HashSet<>(); |
| int indexShardNameSize = in.readInt(); |
| for (int i = 0; i < indexShardNameSize; i++) { |
| filteredIndexShardNames.add(in.readUTF()); |
| } |
| if (in.readBoolean()) { |
| this.segmentString = in.readUTF(); |
| } |
| this.indexSize = in.readLong(); |
| } |
| |
| public SegmentMetaDataInfo getSegmentMetaDataInfo() { |
| return segmentMetaDataInfo; |
| } |
| |
| public void setSegmentMetaDataInfo(SegmentMetaDataInfo segmentMetaDataInfo) { |
| this.segmentMetaDataInfo = segmentMetaDataInfo; |
| } |
| } |