/**
* Copyright (C) 2011 the original author or authors.
* See the notice.md file distributed with this work for additional
* information regarding copyright ownership.
*
* Licensed 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.iq80.leveldb.impl;
import com.google.common.collect.ArrayListMultimap;
import com.google.common.collect.ImmutableMap;
import com.google.common.collect.ImmutableMultimap;
import com.google.common.collect.Maps;
import com.google.common.collect.Multimap;
import org.iq80.leveldb.util.DynamicSliceOutput;
import org.iq80.leveldb.util.Slice;
import org.iq80.leveldb.util.SliceInput;
import org.iq80.leveldb.util.VariableLengthQuantity;
import java.util.Map;
public class VersionEdit
{
private String comparatorName;
private Long logNumber;
private Long nextFileNumber;
private Long previousLogNumber;
private Long lastSequenceNumber;
private final Map<Integer, InternalKey> compactPointers = Maps.newTreeMap();
private final Multimap<Integer, FileMetaData> newFiles = ArrayListMultimap.create();
private final Multimap<Integer, Long> deletedFiles = ArrayListMultimap.create();
public VersionEdit()
{
}
public VersionEdit(Slice slice)
{
SliceInput sliceInput = slice.input();
while(sliceInput.isReadable()) {
int i = VariableLengthQuantity.readVariableLengthInt(sliceInput);
VersionEditTag tag = VersionEditTag.getValueTypeByPersistentId(i);
tag.readValue(sliceInput, this);
}
}
public String getComparatorName()
{
return comparatorName;
}
public void setComparatorName(String comparatorName)
{
this.comparatorName = comparatorName;
}
public Long getLogNumber()
{
return logNumber;
}
public void setLogNumber(long logNumber)
{
this.logNumber = logNumber;
}
public Long getNextFileNumber()
{
return nextFileNumber;
}
public void setNextFileNumber(long nextFileNumber)
{
this.nextFileNumber = nextFileNumber;
}
public Long getPreviousLogNumber()
{
return previousLogNumber;
}
public void setPreviousLogNumber(long previousLogNumber)
{
this.previousLogNumber = previousLogNumber;
}
public Long getLastSequenceNumber()
{
return lastSequenceNumber;
}
public void setLastSequenceNumber(long lastSequenceNumber)
{
this.lastSequenceNumber = lastSequenceNumber;
}
public Map<Integer, InternalKey> getCompactPointers()
{
return ImmutableMap.copyOf(compactPointers);
}
public void setCompactPointer(int level, InternalKey key)
{
compactPointers.put(level, key);
}
public void setCompactPointers(Map<Integer, InternalKey> compactPointers)
{
this.compactPointers.putAll(compactPointers);
}
public Multimap<Integer, FileMetaData> getNewFiles()
{
return ImmutableMultimap.copyOf(newFiles);
}
// Add the specified file at the specified level.
// REQUIRES: This version has not been saved (see VersionSet::SaveTo)
// REQUIRES: "smallest" and "largest" are smallest and largest keys in file
public void addFile(int level, long fileNumber,
long fileSize,
InternalKey smallest,
InternalKey largest)
{
FileMetaData fileMetaData = new FileMetaData(fileNumber, fileSize, smallest, largest);
addFile(level, fileMetaData);
}
public void addFile(int level, FileMetaData fileMetaData)
{
newFiles.put(level, fileMetaData);
}
public void addFiles(Multimap<Integer, FileMetaData> files)
{
newFiles.putAll(files);
}
public Multimap<Integer, Long> getDeletedFiles()
{
return ImmutableMultimap.copyOf(deletedFiles);
}
// Delete the specified "file" from the specified "level".
public void deleteFile(int level, long fileNumber)
{
deletedFiles.put(level, fileNumber);
}
public Slice encode()
{
DynamicSliceOutput dynamicSliceOutput = new DynamicSliceOutput(4096);
for (VersionEditTag versionEditTag : VersionEditTag.values()) {
versionEditTag.writeValue(dynamicSliceOutput, this);
}
return dynamicSliceOutput.slice();
}
@Override
public String toString()
{
final StringBuilder sb = new StringBuilder();
sb.append("VersionEdit");
sb.append("{comparatorName='").append(comparatorName).append('\'');
sb.append(", logNumber=").append(logNumber);
sb.append(", previousLogNumber=").append(previousLogNumber);
sb.append(", lastSequenceNumber=").append(lastSequenceNumber);
sb.append(", compactPointers=").append(compactPointers);
sb.append(", newFiles=").append(newFiles);
sb.append(", deletedFiles=").append(deletedFiles);
sb.append('}');
return sb.toString();
}
}