|Modifier and Type||Field and Description|
The default batch size limit to use for the sink if batching is supported.
The default setting for whether exactly-once is allowed for the sink.
|Modifier and Type||Method and Description|
Sets the batch size limit for the sink.
Set the function to bind values to a
Creates and returns the JDBC
Sets whether the exactly-once mode is enabled for the sink.
Sets the connection URL for the target database.
The query to execute for each item.
public static final boolean DEFAULT_EXACTLY_ONCE
public static final int DEFAULT_BATCH_LIMIT
@Nonnull public JdbcSinkBuilder<T> updateQuery(@Nonnull String updateQuery)
Which type of statement to use?
In exactly-once mode we recommend using an
Each parallel processor uses a separate transaction: if two processors
try to update the same record, the later one will be deadlocked: it will
be blocked waiting for a record lock but will never get it because the
snapshot will not be able to complete and the lock owner will never
On the other hand, in at-least-once mode we recommend using a
MERGE statement. If a unique key is derived from the items, this can
give you exactly-once behavior through idempotence without using XA
transactions: the MERGE statement will insert a record initially and
overwrite the same record, if the job restarted and the same item is
written again. If you don't have a unique key in the item, use INSERT
with auto-generated key.
updateQuery- the SQL statement to execute for each item
@Nonnull public JdbcSinkBuilder<T> bindFn(@Nonnull BiConsumerEx<PreparedStatement,T> bindFn)
PreparedStatementcreated with the query set with
updateQuery(String). The function should not execute the query, nor call
commit()or any other method.
bindFn- the bind function. The function must be stateless.
@Nonnull public JdbcSinkBuilder<T> jdbcUrl(String connectionUrl)
If your job runs in exactly-once mode, don't use this method, but
dataSourceSupplier(SupplierEx) method, otherwise the job will fail.
If your driver doesn't have an XADataSource implementation, also call
connectionUrl- the connection URL
@Nonnull public JdbcSinkBuilder<T> dataSourceSupplier(SupplierEx<? extends CommonDataSource> dataSourceSupplier)
XADataSource. One dataSource instance will be created on each member. For exactly-once guarantee an XADataSource must be used or the job will fail. If your driver doesn't have an XADataSource implementation, also call
There's no need to use
connection is given to each processor and that connection is held during
the entire job execution.
dataSourceSupplier- the supplier of data source. The function must be stateless.
@Nonnull public JdbcSinkBuilder<T> exactlyOnce(boolean enabled)
Set exactly-once to false if you want your job to run in exactly-once, but want to reduce the guarantee just for the sink.
The default is exactly-once set to true.
enabled- whether exactly-once is allowed for the sink
@Nonnull public JdbcSinkBuilder<T> batchLimit(int batchLimit)
The default batch size limit is 50.
batchLimit- the batch size limit for the sink
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