com.lmax.disruptor.FixedSequenceGroup Maven / Gradle / Ivy
/*
* Copyright 2012 LMAX Ltd.
*
* 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.lmax.disruptor;
import java.util.Arrays;
import com.lmax.disruptor.util.Util;
/**
* Hides a group of Sequences behind a single Sequence
*/
public final class FixedSequenceGroup extends Sequence
{
private final Sequence[] sequences;
/**
* Constructor
*
* @param sequences the list of sequences to be tracked under this sequence group
*/
public FixedSequenceGroup(Sequence[] sequences)
{
this.sequences = Arrays.copyOf(sequences, sequences.length);
}
/**
* Get the minimum sequence value for the group.
*
* @return the minimum sequence value for the group.
*/
@Override
public long get()
{
return Util.getMinimumSequence(sequences);
}
@Override
public String toString()
{
return Arrays.toString(sequences);
}
/**
* Not supported.
*/
@Override
public void set(long value)
{
throw new UnsupportedOperationException();
}
/**
* Not supported.
*/
@Override
public boolean compareAndSet(long expectedValue, long newValue)
{
throw new UnsupportedOperationException();
}
/**
* Not supported.
*/
@Override
public long incrementAndGet()
{
throw new UnsupportedOperationException();
}
/**
* Not supported.
*/
@Override
public long addAndGet(long increment)
{
throw new UnsupportedOperationException();
}
}