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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.hosted.provision;
import com.yahoo.transaction.Mutex;
/**
* Holds a node and mutex pair, with the mutex closed by {@link #close()}.
*
* @author hakon
*/
public class NodeMutex implements Mutex {
private final Node node;
private final Mutex mutex;
public NodeMutex(Node node, Mutex mutex) {
this.node = node;
this.mutex = mutex;
}
public Node node() { return node; }
@Override public void close() { mutex.close(); }
/** Returns a node mutex with the same mutex as this, but the given node. Be sure to close only one. */
public NodeMutex with(Node updatedNode) {
if (!node.equals(updatedNode)) {
throw new IllegalArgumentException("Updated node not equal to current");
}
return new NodeMutex(updatedNode, mutex);
}
}
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