JIRA: https://jira.spring.io/browse/INT-3401 Add Google Guava CLASSPATH check for the `StoredProcExecutor` and use `ConcurrentHashMap` as an alternative to the Guava's `Cache`, when Guava isn't presented in the CLASSPATH Addressing PR comments PR Comments PR Comments: Introduce an internal static `StoredProcExecutor.GuavaCacheWrapper` class to avoid the eager class loading for the `CacheLoader` anonymous class