/*
* Licensed to the Apache Software Foundation (ASF) under one or more contributor license
* agreements. See the NOTICE file distributed with this work for additional information regarding
* copyright ownership. The ASF licenses this file to You 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.apache.geode.cache;
import java.util.*;
/**
* <p>
* An event that describes the culmination of an entire transaction. It either describes the work
* done by a committed transaction or the work abandoned by an explicit rollback or failed commit.
* The actual work is represented by an ordered list of {@link EntryEvent} instances.
*
* <p>
* A <code>TransactionListener</code> receives an instance of this class allowing exploration of the
* resultant operations. The resultant operation is the final result of, potentially, a sequence of
* operations on a key such that earlier operations might be masked. For example, multiple put
* operations using the same key will result in only one {@link EntryEvent} for that key.
*
* <p>
* An instance of TransactionEvent for the same transaction on the originating VM may differ from a
* recipient VM. The amount of variation will depend on the variation of the state of Entries on
* each VM. One reason for why this might occur is the different Expiration/Eviction settings of the
* similar Regions on different VMs.
*
* <p>
* The event lists are ordered according to the chronological order of the indiviual operations.
*
* <p>
* The {@link EntryEvent} instances always return <code>null</code> as their
* {@link CacheEvent#getCallbackArgument callback argument}.
*
*
* @see TransactionListener
* @see EntryEvent
* @since GemFire 4.0
*/
public interface TransactionEvent {
/**
* Gets the <code>TransactionId</code> associated this TransactionEvent.
*
*/
public TransactionId getTransactionId();
/**
* Gets all "create" EntryEvents for this transaction; <code>Region.create</code> and/or
* <code>Region.put</code>
*
* @return <code>List</code> of <code>EntryEvents</code> or <code>Collections.EMPTY_LIST</code>
* @deprecated as of GemFire 5.0, use {@link #getEvents} instead
*/
@Deprecated
public List<EntryEvent<?, ?>> getCreateEvents();
/**
* Gets all "destroy" EntryEvents for this transaction; <code>Region.destroy</code> and
* <code>Region.localDestroy</code>.
*
* @return <code>List</code> of <code>EntryEvents</code> or <code>Collections.EMPTY_LIST</code>
* @deprecated as of GemFire 5.0, use {@link #getEvents} instead
*/
@Deprecated
public List<EntryEvent<?, ?>> getDestroyEvents();
/**
* Gets all <code>Region.put</code> EntryEvents for this transaction.
*
* @return <code>List</code> of <code>EntryEvents</code> or <code>Collections.EMPTY_LIST</code>
* @deprecated as of GemFire 5.0, use {@link #getEvents} instead
*/
@Deprecated
public List<EntryEvent<?, ?>> getPutEvents();
/**
* Gets all "invalidate" EntryEvents for this transaction; <code>Region.invalidate</code> and
* <code>Region.localInvalidate</code>.
*
* @return <code>List</code> of <code>EntryEvents</code> or <code>Collections.EMPTY_LIST</code>
* @deprecated as of GemFire 5.0, use {@link #getEvents} instead
*/
@Deprecated
public List<EntryEvent<?, ?>> getInvalidateEvents();
/**
* Returns an ordered list of every {@link CacheEvent} for this transaction. The event order is
* consistent with the order in which the operations were performed during the transaction.
*
* @return an unmodifiable <code>List</code> of all the {@link CacheEvent} instances; one for each
* operation performed by this transaction.
* @since GemFire 5.0
*/
public List<CacheEvent<?, ?>> getEvents();
/**
* Gets the Cache for this transaction event
*
* @return <code>Cache</code>
*/
public Cache getCache();
}