com.gemstone.gemfire.internal.cache.InternalDeltaEvent Maven / Gradle / Ivy
/*
* Copyright (c) 2010-2015 Pivotal Software, Inc. All rights reserved.
*
* 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. See accompanying
* LICENSE file.
*/
package com.gemstone.gemfire.internal.cache;
import com.gemstone.gemfire.cache.Operation;
import com.gemstone.gemfire.internal.cache.delta.Delta;
/**
* Interface to indicate whether an Event holds an internal {@link Delta}
* object.
*
* @author sjigyasu
* @since 7.5
*/
public interface InternalDeltaEvent {
/**
* Return true if this event holds an internal {@link Delta} object.
*/
public boolean hasDelta();
/**
* Return true if this event is really a create, which can happen in GemFireXD
* if {@link Operation#isCreate()} is true or if {@link Operation#isUpdate()}
* is true with {@link #hasDelta()} as false.
*
* Currently this happens if there is a retry from GFXD thin client resulting
* in a posdup where subsequent insert is put as an UPDATE operation so as to
* not miss WAN queue (#47462).
*
* @param updateAsCreateOnlyForPosDup
* if this is set to true, then treat UPDATE op type as a CREATE when
* value is not a delta ({@link #hasDelta()} is false) (i.e. return
* true) only when event is a possible duplicate, else if event is
* not a possible duplicate (e.g. for concurrent loader invocations)
* then don't treat an UPDATE as a CREATE even if value is a full row
* and not a delta
*
* If this is set to false, then always treat UPDATE op type as a
* CREATE whenever the value is not a delta ({@link #hasDelta()} is
* false)
*/
public boolean isGFXDCreate(boolean updateAsCreateOnlyForPosDup);
}