stone-98 commented on pull request #9111:
URL: https://github.com/apache/dubbo/pull/9111#issuecomment-952064468
For the Converter interface, if I could go from sourceType to targetType, it
certain can be convert from targetType to sourceType. But the Converter
interface does not support it. In fact, there are corresponding application
scenarios，For example, RpcUtils transforms timeout.
```java
private static long convertToNumber(Object obj, long defaultTimeout) {
long timeout = 0;
try {
if (obj instanceof String) {
timeout = Long.parseLong((String) obj);
} else if (obj instanceof Number) {
timeout = ((Number) obj).longValue();
} else {
timeout = Long.parseLong(obj.toString());
}
} catch (Exception e) {
// ignore
}
return timeout;
}
```
By the way, there is a bug that the defaultTimeout does not take effect.
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