1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License. You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing,
13 * software distributed under the License is distributed on an
14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15 * KIND, either express or implied. See the License for the
16 * specific language governing permissions and limitations
17 * under the License.
18 */
19 package org.apache.openjpa.jdbc.kernel;
20
21 import java.sql.Connection;
22 import java.util.Collection;
23
24 import org.apache.openjpa.jdbc.sql.RowManager;
25
26 /**
27 * <P>Batch update manager that writes the SQL in object-level operation order.
28 * This update manager initiates a BatchPreparedStatementManagerImpl which
29 * will utilize the JDBC addBatch() and executeBatch() APIs to batch the
30 * statements for performance improvement.</P>
31 * <P>This is the default plug-in class for UpdateManager to support statement
32 * batching. You can plug-in your own statement batch implementation through
33 * the following property:
34 * <PRE>
35 * < property name="openjpa.jdbc.UpdateManager"
36 * value="org.apache.openjpa.jdbc.kernel.YourOperationOrderUpdateManager" />
37 * </PRE></P>
38 * @author Teresa Kan
39 */
40
41 public class BatchingConstraintUpdateManager extends ConstraintUpdateManager {
42
43 protected PreparedStatementManager newPreparedStatementManager(
44 JDBCStore store, Connection conn) {
45 int batchLimit = dict.getBatchLimit();
46 return new BatchingPreparedStatementManagerImpl(store, conn,
47 batchLimit);
48 }
49
50 /*
51 * Override this method to flush any remaining batched row in the
52 * PreparedStatementManager.
53 */
54 protected Collection flush(RowManager rowMgr,
55 PreparedStatementManager psMgr, Collection exceps) {
56 Collection rtnCol = super.flush(rowMgr, psMgr, exceps);
57 BatchingPreparedStatementManagerImpl bPsMgr =
58 (BatchingPreparedStatementManagerImpl) psMgr;
59 bPsMgr.flushBatch();
60 return rtnCol;
61 }
62 }
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