/*
* Copyright (C) 2012-2015 DataStax Inc.
*
* 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.datastax.driver.core;
/**
* The type of a Cassandra write query.
* <p/>
* This information is returned by Cassandra when a write timeout is raised to
* indicate what type of write timed out. This information is useful to decide
* which retry policy to adopt.
*/
public enum WriteType {
/**
* A write to a single partition key. Such writes are guaranteed to be atomic and isolated.
*/
SIMPLE,
/**
* A write to a multiple partition key that used the distributed batch log to ensure atomicity
* (atomicity meaning that if any statement in the batch succeeds, all will eventually succeed).
*/
BATCH,
/**
* A write to a multiple partition key that doesn't use the distributed batch log. Atomicity for such writes is not guaranteed
*/
UNLOGGED_BATCH,
/**
* A counter write (that can be for one or multiple partition key). Such write should not be replayed to avoid over-counting.
*/
COUNTER,
/**
* The initial write to the distributed batch log that Cassandra performs internally before a BATCH write.
*/
BATCH_LOG,
/**
* A conditional write. If a timeout has this {@code WriteType}, the timeout has happened while doing the compare-and-swap for
* an conditional update. In this case, the update may or may not have been applied.
*/
CAS;
}