zjcnb opened a new issue, #19013:
URL: https://github.com/apache/shardingsphere/issues/19013
Hi community,
The governance center sent `SchemaChangedEvent` many times when i have
many single tables to persist governance center.
```
/**
* Renew meta data of the schema.
*
* @param event meta data changed event
*/
@Subscribe
public synchronized void renew(final SchemaChangedEvent event) {
contextManager.alterSchema(event.getDatabaseName(),
event.getSchemaName(), event.getChangedTableMetaData(),
event.getDeletedTable());
}
```
Send many `SchemaChangedEvent` event resut in build all rules used by the
user.
```
private synchronized void alterTable(final ShardingSphereDatabase
database, final String schemaName, final ShardingSphereTable beBoChangedTable) {
if (containsMutableDataNodeRule(database, schemaName,
beBoChangedTable.getName())) {
database.reloadRules(instanceContext);
}
database.getSchemas().get(schemaName).put(beBoChangedTable.getName(),
beBoChangedTable);
}
```
```
public synchronized void reloadRules(final InstanceContext
instanceContext) {
Collection<ShardingSphereRule> databaseRules =
DatabaseRulesBuilder.build(
name, new
DataSourceProvidedDatabaseConfiguration(resource.getDataSources(),
ruleMetaData.getConfigurations()), instanceContext);
ruleMetaData.getRules().clear();
ruleMetaData.getRules().addAll(databaseRules);
}
```
I don't think it's necessary. So, we need to provide a way to refresh a
single Rule method.
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