return false;
            }
            return reindexResult;
        }

        @Override
        public boolean existsIndex(final String indexName) {
            calledMethods.add("existsIndex");
            if (useExistingIndicesSet) {
                return existingIndices.contains(indexName);
            }
            return existsIndexResult;
        }

        ComponentUtil.register(new SystemHelper(), "systemHelper");
        ComponentUtil.register(new SearchEngineClient() {
            @Override
            public boolean existsIndex(final String indexName) {
                return false;
            }
        }, "searchEngineClient");

        String result = logNotificationJob.execute();
        assertEquals("No log notifications.", result);

                final boolean isFessIndex = DOC_INDEX.equals(configIndex);
                final String indexName;
                if (isFessIndex) {
                    final boolean exists = existsIndex(fessConfig.getIndexDocumentUpdateIndex());
                    if (!exists) {
                        indexName = generateNewIndexName(configIndex);
                        createIndex(configIndex, indexName);

    }

    private void ensureIndexExists(final SearchEngineClient client, final String indexName) {
        if (!indexChecked) {
            if (!client.existsIndex(indexName)) {
                client.createIndex(NOTIFICATION_QUEUE_INDEX, indexName);
            }
            indexChecked = true;
        }
    }

        }

        final SearchEngineClient client = ComponentUtil.getSearchEngineClient();
        final String indexName = fessConfig.getIndexLogIndex() + ".notification_queue";

        if (!client.existsIndex(indexName)) {
            return "No log notifications.";
        }

        final int searchSize = fessConfig.getLogNotificationSearchSizeAsInteger();