@Override
    public void clearAllRevisions(String siddhiAppId) {
        List<String> revisionList = revisionMap.remove(siddhiAppId);
        if (revisionList == null) {
            log.info("No revisions were found to delete for the Siddhi App " + siddhiAppId);
            return;
        }
        log.info("All revisions were deleted for the Siddhi App " + siddhiAppId);
    }
Implementation of {@link PersistenceStore} which will store the state in-memory.
modules/siddhi-core/src/main/java/io/siddhi/core/util/persistence/InMemoryPersistenceStore.java