https://github.com/datastax/java-driver/java-driver-core: A driver for Apache Cassandra(R) 2.1+ that works exclusively with the Cassandra Query Language version 3 (CQL3) and Cassandra's native protocol versions 3 and above.
  • Various (DataStax) 
/*
 * Copyright 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.oss.driver.api.core.cql;


The type of a batch.

The only reason to model this as an interface (as opposed to an enum type) is to accommodate for custom protocol extensions. If you're connecting to a standard Apache Cassandra cluster, all BatchTypes are DefaultBatchType instances. 
/**
 * The type of a batch.
 *
 * <p>The only reason to model this as an interface (as opposed to an enum type) is to accommodate
 * for custom protocol extensions. If you're connecting to a standard Apache Cassandra cluster, all
 * {@code BatchType}s are {@link DefaultBatchType} instances.
 */
public interface BatchType {

  BatchType LOGGED = DefaultBatchType.LOGGED;
  BatchType UNLOGGED = DefaultBatchType.UNLOGGED;
  BatchType COUNTER = DefaultBatchType.COUNTER;

  
The numerical value that the batch type is encoded to. 
/** The numerical value that the batch type is encoded to. */
  byte getProtocolCode();

  // Implementation note: we don't have a "BatchTypeRegistry" because we never decode batch types.
  // This can be added later if needed (see ConsistencyLevelRegistry for an example).
}