Hi,
For JDBC 4.2, I am adding methods to allow for larger update counts (request
from JDBC driver vendors) and because of this I have to tweak
BatchUpdateException
The Statement interface has the method
int[] executeBatch()
I am planning to add
long[] executeLargeBatch().
To accomodate this change, I also need to add a new field and the method
getLargeUpdateCount to BatchUpdateException.
I have exchanged emails on this with Alan and he indicated that the changes
seemed reasonable but to send a general email out to see if anything was
missed from the serialization perspective.
I have added JDBC Unit tests to validate that the serialization/deserialization
works between JDBC 4.1 and JDBC 4.2 and they run without a problem.
Best
Lance
new-host-2:sql lanceandersen$ diff BatchUpdateException.java
~/NetBeansProjects/JDBC4.2/jdbc4.0/src/java/sql/
2c2
< * Copyright (c) 1998, 2011, Oracle and/or its affiliates. All rights
reserved.
---
> * Copyright (c) 1998, 2012, Oracle and/or its affiliates. All rights
> reserved.
27a28,31
> import java.io.IOException;
> import java.io.InvalidObjectException;
> import java.io.ObjectInputStream;
> import java.io.ObjectOutputStream;
83a88
> this.longUpdateCounts = (updateCounts == null) ? null :
> copyUpdateCount(updateCounts);
192c197
< this((cause == null ? null : cause.toString()), null, 0, null, cause);
---
> this((cause == null ? null : cause.toString()), null, 0, (int[])null,
> cause);
295a301
> this.longUpdateCounts = (updateCounts == null) ? null :
> copyUpdateCount(updateCounts);
331c337,401
<
---
>
> /**
> * Constructs a <code>BatchUpdateException</code> object initialized with
> * a given <code>reason</code>, <code>SQLState</code>,
> <code>vendorCode</code>
> * <code>cause</code> and <code>updateCounts</code>.
> * <p>
> * This constructor should be used when the returned update count may exceed
> * {@link Integer.MAX_VALUE}.
> * <p>
> * @param reason a description of the error
> * @param SQLState an XOPEN or SQL:2003 code identifying the exception
> * @param vendorCode an exception code used by a particular
> * database vendor
> * @param updateCounts an array of <code>long</code>, with each element
> *indicating the update count, <code>Statement.SUCCESS_NO_INFO</code> or
> * <code>Statement.EXECUTE_FAILED</code> for each SQL command in
> * the batch for JDBC drivers that continue processing
> * after a command failure; an update count or
> * <code>Statement.SUCCESS_NO_INFO</code> for each SQL command in the batch
> * prior to the failure for JDBC drivers that stop processing after a
> command
> * failure
> * @param cause the underlying reason for this <code>SQLException</code>
> * (which is saved for later retrieval by the <code>getCause()</code>
> method);
> * may be null indicating the cause is non-existent or unknown.
> * @since 1.8
> */
> public BatchUpdateException(String reason, String SQLState, int vendorCode,
> long []updateCounts,Throwable cause) {
> super(reason, SQLState, vendorCode, cause);
> this.longUpdateCounts = (updateCounts == null) ? null :
> Arrays.copyOf(updateCounts, updateCounts.length);
> this.updateCounts = (longUpdateCounts == null) ? null :
> copyUpdateCount(longUpdateCounts);
> }
>
> /**
> * Retrieves the update count for each update statement in the batch
> * update that executed successfully before this exception occurred.
> * A driver that implements batch updates may or may not continue to
> * process the remaining commands in a batch when one of the commands
> * fails to execute properly. If the driver continues processing commands,
> * the array returned by this method will have as many elements as
> * there are commands in the batch; otherwise, it will contain an
> * update count for each command that executed successfully before
> * the <code>BatchUpdateException</code> was thrown.
> * <p>
> * This method should be used when the returned update count may exceed
> * {@link Integer.MAX_VALUE}.
> * <p>
> * @return an array of <code>long</code> containing the update counts
> * for the updates that were executed successfully before this error
> * occurred. Or, if the driver continues to process commands after an
> * error, one of the following for every command in the batch:
> * <OL>
> * <LI>an update count
> * <LI><code>Statement.SUCCESS_NO_INFO</code> to indicate that the command
> * executed successfully but the number of rows affected is unknown
> * <LI><code>Statement.EXECUTE_FAILED</code> to indicate that the command
> * failed to execute successfully
> * </OL>
> * @since 1.8
> */
> public long[] getLargeUpdateCounts() {
> return (longUpdateCounts == null) ? null :
> Arrays.copyOf(longUpdateCounts, longUpdateCounts.length);
> }
>
337c407,414
< private final int[] updateCounts;
---
> private int[] updateCounts;
>
> /**
> * The array that describes the outcome of a batch execution.
> * @serial
> * @since 1.8
> */
> private long[] longUpdateCounts;
339a417,474
>
> /*
> * Utility method to copy int[] updateCount to long[] updateCount
> */
> private static long[] copyUpdateCount(int[] uc) {
> long[] copy = new long[uc.length];
> for(int i= 0; i< uc.length; i++) {
> copy[i] = uc[i];
>
> }
> return copy;
> }
>
> /*
> * Utility method to copy int[] updateCount to long[] updateCount
> */
> private static int[] copyUpdateCount(long[] uc) {
> int[] copy = new int[uc.length];
> for(int i= 0; i< uc.length; i++) {
> copy[i] = (int) uc[i];
> }
> return copy;
> }
> /**
> * readObject is called to restore the state of the
> * {@code BatchUpdateException} from a stream.
> */
> private void readObject(ObjectInputStream s)
> throws IOException, ClassNotFoundException {
>
> ObjectInputStream.GetField fields = s.readFields();
> int[] tmp = (int[])fields.get("updateCounts", null);
> long[] tmp2 = (long[])fields.get("longUpdateCounts", null);
> if(tmp != null && tmp2 != null && tmp.length != tmp2.length)
> throw new InvalidObjectException("update counts are not the
> expected size");
> if (tmp != null)
> updateCounts = tmp.clone();
> if (tmp2 != null)
> longUpdateCounts = tmp2.clone();
> if(updateCounts == null && longUpdateCounts != null)
> updateCounts = copyUpdateCount(longUpdateCounts);
> if(longUpdateCounts == null && updateCounts != null)
> longUpdateCounts = copyUpdateCount(updateCounts);
>
> }
>
> /**
> * writeObject is called to save the state of the {@code
> BatchUpdateException}
> * to a stream.
> */
> private void writeObject(ObjectOutputStream s)
> throws IOException, ClassNotFoundException {
>
> ObjectOutputStream.PutField fields = s.putFields();
> fields.put("updateCounts", updateCounts);
> fields.put("longUpdateCounts", longUpdateCounts);
> s.writeFields();
> }
Lance Andersen| Principal Member of Technical Staff | +1.781.442.2037
Oracle Java Engineering
1 Network Drive
Burlington, MA 01803
lance.ander...@oracle.com
