roodkcab commented on a change in pull request #13034:
URL: https://github.com/apache/shardingsphere/pull/13034#discussion_r728822369
##########
File path:
shardingsphere-proxy/shardingsphere-proxy-backend/src/main/java/org/apache/shardingsphere/proxy/backend/text/admin/mysql/executor/information/AbstractSelectInformationExecutor.java
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@@ -153,7 +153,14 @@ protected Object getSourceData(final String schemaName)
throws SQLException {
ShardingSphereResource resource =
ProxyContext.getInstance().getContextManager().getMetaDataContexts().getMetaData(schemaName).getResource();
Optional<Entry<String, DataSource>> dataSourceEntry =
resource.getDataSources().entrySet().stream().findFirst();
log.info("Actual SQL: {} ::: {}",
dataSourceEntry.orElseThrow(DatabaseNotExistedException::new).getKey(), sql);
- return
dataSourceEntry.get().getValue().getConnection().prepareStatement(sql).executeQuery();
+ Connection conn = dataSourceEntry.get().getValue().getConnection();
+ try {
+ return conn.prepareStatement(sql).executeQuery();
+ } catch (SQLException e) {
+ throw e;
+ } finally {
+ conn.close();
+ }
Review comment:
use callback in try-with-resouce
```
try (Connection conn = dataSourceEntry.get().getValue().getConnection();
PreparedStatement ps = conn.prepareStatement(sql);) {
callback(ps.executeQuery());
}
```
where build callback functor from constructRowData
then turn ```constructRowData(schemaName, getSourceData(schemaName))``` into
```getSourceData(schemaName, constructRowData(schemaName))```
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