@Override
            public Integer getCoordinatorOperationTtlAsInteger() {
                return 7200000;
            }

            @Override
            public Integer getCoordinatorOperationRetryAsInteger() {
                return 3;
            }

            @Override
            public Integer getCoordinatorEventTtlAsInteger() {
                return 600000;
            }

     * @return {@code true} if the lock was acquired.
     */
    public boolean tryStartOperation(final String operationName, final String data) {
        final int maxRetry = ComponentUtil.getFessConfig().getCoordinatorOperationRetryAsInteger();
        return tryStartOperation(operationName, data, maxRetry);
    }

    /**
     * Internal method to acquire a distributed lock with retry control.
     *

     * @return The value of found property. (NotNull: if not found, exception but basically no way)
     * @throws NumberFormatException When the property is not integer.
     */
    Integer getCoordinatorOperationRetryAsInteger();

    /**
     * Get the value for the key 'coordinator.event.ttl'. <br>
     * The value is, e.g. 600000 <br>
     * comment: Time-to-live (ms) for event notification documents.