2 * ============LICENSE_START==========================================
4 * ===================================================================
5 * Copyright © 2017-2018 AT&T Intellectual Property. All rights reserved.
6 * Copyright © 2017-2018 Amdocs
7 * ===================================================================
8 * Licensed under the Apache License, Version 2.0 (the "License");
9 * you may not use this file except in compliance with the License.
10 * You may obtain a copy of the License at
12 * http://www.apache.org/licenses/LICENSE-2.0
14 * Unless required by applicable law or agreed to in writing, software
15 * distributed under the License is distributed on an "AS IS" BASIS,
16 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17 * See the License for the specific language governing permissions and
18 * limitations under the License.
19 * ============LICENSE_END============================================
21 package org.onap.aai.champcore;
23 import java.util.ArrayList;
24 import java.util.Collections;
25 import java.util.List;
26 import java.util.UUID;
28 import org.onap.aai.champcore.event.ChampEvent;
29 import org.onap.aai.champcore.exceptions.ChampTransactionException;
32 * This class defines the interface for a graph transaction object.
34 public abstract class ChampTransaction {
36 /** Unique identifier for this transaction (largely for logging purposes). */
39 protected List<ChampEvent> eventList = Collections.synchronizedList(new ArrayList<ChampEvent>());
41 public ChampTransaction() {
43 // Create a unique identifier for this transaction.
44 id = UUID.randomUUID();
51 public void logEvent(ChampEvent event) {
55 public List<ChampEvent> getEnqueuedEvents() {
60 * Finalize all updates to the graph which have been made within the context
61 * of this transaction.
63 public abstract void commit() throws ChampTransactionException ;
67 * Aborts all graph changes made within the context of this transaction, backing
68 * out all changes as if they had never happened.
70 public abstract void rollback() throws ChampTransactionException ;