/**
* Copyright 2008 Google 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 org.waveprotocol.wave.model.operation;
/**
* An extension of the basic sink that takes hints about grouping operations together (perhaps
* for batching, merging, etc). If passing a group of operations to a sequencer, call
* {@link #begin()} before the first operation, and {@link #end()} after the last operation.
* Groups can be nested.
*
* @param <T> operation type
* @author danilatos@google.com
*/
public interface OperationSequencer<T> {
/**
* Begin a set of executed operations.
* Set up any state or other tasks as necessary.
*/
void begin();
/**
* End a set of executed operations.
* Perform any notifications or other tasks as necessary.
*/
void end();
/**
* Consumes an operation
* @param op
*/
void consume(T op);
}