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https://issues.apache.org/jira/browse/BEAM-3500?focusedWorklogId=79336&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-79336
]
ASF GitHub Bot logged work on BEAM-3500:
----------------------------------------
Author: ASF GitHub Bot
Created on: 12/Mar/18 06:31
Start Date: 12/Mar/18 06:31
Worklog Time Spent: 10m
Work Description: jbonofre commented on a change in pull request #4461:
[BEAM-3500] "Attach" JDBC connection to the bundle and add DataSourceFactory
allowing full control of the way the DataSource is created
URL: https://github.com/apache/beam/pull/4461#discussion_r173702692
##########
File path:
sdks/java/io/jdbc/src/main/java/org/apache/beam/sdk/io/jdbc/JdbcIO.java
##########
@@ -525,18 +596,24 @@ public void populateDisplayData(DisplayData.Builder
builder) {
private ReadFn(
DataSourceConfiguration dataSourceConfiguration,
+ DataSourceFactory dataSourceFactory,
ValueProvider<String> query,
PreparedStatementSetter<ParameterT> parameterSetter,
RowMapper<OutputT> rowMapper) {
this.dataSourceConfiguration = dataSourceConfiguration;
+ this.dataSourceFactory = dataSourceFactory;
this.query = query;
this.parameterSetter = parameterSetter;
this.rowMapper = rowMapper;
}
@Setup
public void setup() throws Exception {
- dataSource = dataSourceConfiguration.buildDatasource();
+ if (dataSourceFactory != null) {
+ dataSource = dataSourceFactory.create();
Review comment:
In the case where the user provides its own `dataSourceFactory`, I guess he
wants to have complete control and can "wrap" himself in a pool no ? The
pooling is in the case of the user provides a `dataSource` or configuration to
create a `dataSource` internally in the IO (using DBCP). Thoughts ?
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Issue Time Tracking
-------------------
Worklog Id: (was: 79336)
Time Spent: 3h 40m (was: 3.5h)
> JdbcIO: Improve connection management
> -------------------------------------
>
> Key: BEAM-3500
> URL: https://issues.apache.org/jira/browse/BEAM-3500
> Project: Beam
> Issue Type: Improvement
> Components: io-java-jdbc
> Affects Versions: 2.2.0
> Reporter: Pawel Bartoszek
> Assignee: Jean-Baptiste Onofré
> Priority: Major
> Time Spent: 3h 40m
> Remaining Estimate: 0h
>
> JdbcIO write DoFn acquires connection in {{@Setup}} and release it in
> {{@Teardown}} methods, which means that connection might stay opened for days
> in streaming job case. Keeping single connection open for so long might be
> very risky as it's exposed to database, network etc issues.
> *Taking connection from the pool when it is actually needed*
> I suggest that connection would be taken from the connection pool in
> {{executeBatch}} method and released when the batch is flushed. This will
> allow the pool to take care of any returned unhealthy connections etc.
> *Make JdbcIO accept data source factory*
> It would be nice if JdbcIO accepted DataSourceFactory rather than DataSource
> itself. I am saying that because sink checks if DataSource implements
> `Serializable` interface, which make it impossible to pass
> BasicDataSource(used internally by sink) as it doesn’t implement this
> interface. Something like:
> {code:java}
> interface DataSourceFactory extends Serializable{
> DataSource create();
> }
> {code}
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