com.netflix.astyanax.recipes.uniqueness.UniquenessConstraint Maven / Gradle / Ivy
/*******************************************************************************
* Copyright 2011 Netflix
*
* 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.netflix.astyanax.recipes.uniqueness;
import com.google.common.base.Function;
import com.netflix.astyanax.MutationBatch;
public interface UniquenessConstraint {
/**
* Acquire the row(s) for uniqueness. Call release() when the uniqueness on
* the row(s) is no longer needed, such as when deleting the rows.
*
* @throws NotUniqueException
* @throws Exception
*/
void acquire() throws NotUniqueException, Exception;
/**
* Release the uniqueness lock for this row. Only call this when you no longer
* need the uniqueness lock
*
* @throws Exception
*/
void release() throws Exception;
/**
* Acquire the uniqueness constraint and apply the final mutation if the
* row is found to be unique
* @param mutation
* @throws NotUniqueException
* @throws Exception
*
* @deprecated This method doesn't actually work because the MutationBatch timestamp being behind
*/
@Deprecated
void acquireAndMutate(MutationBatch mutation) throws NotUniqueException, Exception;
/**
* Acquire the uniqueness constraint and call the mutate callback to fill a mutation.
*
* @param callback
* @throws NotUniqueException
* @throws Exception
*/
void acquireAndApplyMutation(Function callback) throws NotUniqueException, Exception;
}