Provide an out-of-the-box WaitStrategy that validates Cassandra's CqlSession is available

We're using testcontainers with Cassandra and we need to make sure that the CqlSession is available as things happen asynchronously.

We ended up, with the help of the Cassandra team, with this code.

Although the local datacenter is specific, it could be a parameter of some kind maybe? Or a supplier for CqlSessionBuilder?

It looks like every ITs would need this strategy so it would be awesome if the project would provide that.

spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/cassandra/CassandraAutoConfigurationWithPasswordAuthenticationIntegrationTests.java にある参照先の Spring Boot テストから始め、CqlSession の利用可能性をどのように確認しているかを確認してください。すぐに使える Cassandra WaitStrategy が検証すべき内容を定義し、ローカルデータセンターの設定をどのように渡すかも含めてください。この戦略が非同期のセッション利用可能性をサポートすれば完了です。