hua74ni commented on PR #26007:
URL: https://github.com/apache/shardingsphere/pull/26007#issuecomment-1573207264
Test cases
```
@Test
public void assertTest() throws InterruptedException {
ShardingSphereRuleMetaData ruleMetaData = new
ShardingSphereRuleMetaData(Collections.singleton(new
ShardingSphereRuleFixture()));
Thread thread = new Thread(new Runnable() {
@Override
public void run() {
System.out.println("start cycle get ruleMetaData rules...");
while (true) {
if (CollectionUtils.isEmpty(ruleMetaData.getRules())) {
System.out.println("ruleMetaData rules is null!!!!");
}
}
}
});
thread.setDaemon(true);
thread.start();
Thread.sleep(1000);
boolean flag = false;
System.out.println("start replace all ruleMetaData rules...");
if (flag) {
((CopyOnWriteArrayList)
ruleMetaData.getRules()).replaceAll(shardingSphereRule -> {
return new ShardingSphereRuleFixture();
});
} else {
ShardingSphereRuleMetaData newRuleMetaData = new
ShardingSphereRuleMetaData(Collections.singleton(new
ShardingSphereRuleFixture()));
ruleMetaData.getRules().clear();
ruleMetaData.getRules().addAll(newRuleMetaData.getRules());
}
System.out.println("finished replace all ruleMetaData rules...");
Thread.sleep(3000);
}
```
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