com.facebook.presto.jdbc.internal.common.block.DictionaryId Maven / Gradle / Ivy
/*
* 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 com.facebook.presto.jdbc.internal.common.block;
import java.util.Objects;
import java.util.UUID;
import java.util.concurrent.atomic.AtomicLong;
public class DictionaryId
{
private static final UUID nodeId = UUID.randomUUID();
private static final AtomicLong sequenceGenerator = new AtomicLong();
private final long mostSignificantBits;
private final long leastSignificantBits;
private final long sequenceId;
public static DictionaryId randomDictionaryId()
{
return new DictionaryId(nodeId.getMostSignificantBits(), nodeId.getLeastSignificantBits(), sequenceGenerator.getAndIncrement());
}
public DictionaryId(long mostSignificantBits, long leastSignificantBits, long sequenceId)
{
this.mostSignificantBits = mostSignificantBits;
this.leastSignificantBits = leastSignificantBits;
this.sequenceId = sequenceId;
}
public long getMostSignificantBits()
{
return mostSignificantBits;
}
public long getLeastSignificantBits()
{
return leastSignificantBits;
}
public long getSequenceId()
{
return sequenceId;
}
@Override
public boolean equals(Object o)
{
if (this == o) {
return true;
}
if (o == null || getClass() != o.getClass()) {
return false;
}
DictionaryId that = (DictionaryId) o;
return mostSignificantBits == that.mostSignificantBits &&
leastSignificantBits == that.leastSignificantBits &&
sequenceId == that.sequenceId;
}
@Override
public int hashCode()
{
return Objects.hash(mostSignificantBits, leastSignificantBits, sequenceId);
}
}
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