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Implementation of transactions needs a LockManager enabling to lock and unlock particular keys in Storage. It may look as simple as this but will be clarified when transaction protocol is defined:

Code Block
languagejava
titleLockManager API
/** Interface enabling obtaining locks on Keys in Storage. */
public interface LockManager {
	/** Locks given Key. */
	public void lock(Key key);

	/** Unlocks given Key. */
	public void unlock(Key key);
}

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