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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.curator;
import com.yahoo.transaction.Mutex;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* Class that holds two locks, originally used for transitioning from one lock to
* another, where you need to hold both the old lock and the new lock in the
* transition period. Locks are acquired in constructor.
*
* @author hmusum
*/
public class MultiplePathsLock implements Mutex {
private static final Logger log = Logger.getLogger(MultiplePathsLock.class.getName());
private final List<Lock> locks;
/** Wrapped locks, in acquisition order. */
public MultiplePathsLock(Lock... locks) {
this.locks = List.of(locks);
}
@Override
public void close() {
close(0);
}
private void close(int i) {
if (i < locks.size())
try (Lock lock = locks.get(i)) {
close(i + 1);
log.log(Level.FINE, "Closing lock " + lock.lockPath());
}
}
}
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