org.apache.cassandra.io.sstable.format.Version Maven / Gradle / Ivy
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* 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,
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* limitations under the License.
*/
package org.apache.cassandra.io.sstable.format;
import java.util.regex.Pattern;
import org.apache.cassandra.utils.ChecksumType;
/**
* A set of feature flags associated with a SSTable format
*
* versions are denoted as [major][minor]. Minor versions must be forward-compatible:
* new fields are allowed in e.g. the metadata component, but fields can't be removed
* or have their size changed.
*
* Minor versions were introduced with version "hb" for Cassandra 1.0.3; prior to that,
* we always incremented the major version.
*
*/
public abstract class Version
{
private static final Pattern VALIDATION = Pattern.compile("[a-z]+");
protected final String version;
protected final SSTableFormat format;
protected Version(SSTableFormat format, String version)
{
this.format = format;
this.version = version;
}
public abstract boolean isLatestVersion();
public abstract boolean hasSamplingLevel();
public abstract boolean hasNewStatsFile();
public abstract ChecksumType compressedChecksumType();
public abstract ChecksumType uncompressedChecksumType();
public abstract boolean hasRepairedAt();
public abstract boolean tracksLegacyCounterShards();
public abstract boolean hasNewFileName();
public abstract boolean storeRows();
public abstract int correspondingMessagingVersion(); // Only use by storage that 'storeRows' so far
public abstract boolean hasOldBfHashOrder();
public abstract boolean hasCompactionAncestors();
public abstract boolean hasBoundaries();
public abstract boolean hasCommitLogLowerBound();
public abstract boolean hasCommitLogIntervals();
public abstract boolean hasAccurateMinMax();
public String getVersion()
{
return version;
}
public SSTableFormat getSSTableFormat()
{
return format;
}
/**
* @param ver SSTable version
* @return True if the given version string matches the format.
* @see #version
*/
public static boolean validate(String ver)
{
return ver != null && VALIDATION.matcher(ver).matches();
}
abstract public boolean isCompatible();
abstract public boolean isCompatibleForStreaming();
@Override
public String toString()
{
return version;
}
@Override
public boolean equals(Object o)
{
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
Version version1 = (Version) o;
if (version != null ? !version.equals(version1.version) : version1.version != null) return false;
return true;
}
@Override
public int hashCode()
{
return version != null ? version.hashCode() : 0;
}
}