default boolean init(Cache cache) {
    return true;
  }
Initialize the service with a cache.

Services are initialized in random order, fairly early on in cache initialization. In
particular, the cache.xml has not yet been parsed.

@return a boolean indicating whether the service was successfully initialized. If false, then
        the service will not subsequently be available.
geode-core/src/main/java/org/apache/geode/internal/cache/CacheService.java