Store non-empty bean names in ConcurrentMapCacheFactoryBean

[dukbong]

Typically, there are no bean names composed solely of whitespace, so the parameter for this method should be a meaningful value. To ensure the accuracy of that value, it seems more appropriate to use hasText rather than hasLength.

[sbrannen]

Hi @dukbong,

Typically, there are no bean names composed solely of whitespace, so the parameter for this method should be a meaningful value.

Indeed, it is unlikely (or at least undesirable) to have a bean name composed solely of whitespace; however, this check is not meant to guard against that scenario.

Rather, we only intend to ensure the bean/cache name is non-null and has length (because "" is already the default for the cache name).

In light of that, we will leave this hasLength check as-is.

Thanks anyway for the PR.