LockManager.java

package com.tesora.dve.lockmanager;

/*
 * #%L
 * Tesora Inc.
 * Database Virtualization Engine
 * %%
 * Copyright (C) 2011 - 2014 Tesora Inc.
 * %%
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License, version 3,
 * as published by the Free Software Foundation.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Affero General Public License for more details.
 * 
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 * #L%
 */

import com.tesora.dve.resultset.IntermediateResultSet;

// basic lock manager interface
public interface LockManager {

	// blocks until the lock is acquired or a lock exception is thrown
	// lock type is either shared or exclusive
	// intxn if the caller is in a txn
	AcquiredLock acquire(LockClient c, LockSpecification l, LockType type);
	
	// release the specified lock
	void release(AcquiredLock al);

	public IntermediateResultSet showState();
	
	public String assertNoLocks();	
}