public static UserAgentStringParser getOnlineUpdatingParser(final URL dataUrl, final URL versionUrl) {
		return OnlineUpdatingParserHolder.getParser(dataUrl, versionUrl, RESOURCE_MODULE);
	}
public static UserAgentStringParser getOnlineUpdatingParser ( final URL dataUrl , final URL versionUrl ) { return OnlineUpdatingParserHolder . getParser ( dataUrl , versionUrl , RESOURCE_MODULE ) ; }
Returns an implementation of {@link UserAgentStringParser} which checks at regular intervals for new versions of
<em>UAS data</em> (also known as database). When newer data available, it automatically loads and updates it.

<p>
At initialization time the returned parser will be loaded with the <em>UAS data</em> of this module (the shipped
one within the <em>uadetector-resources</em> JAR) and tries to update it. The initialization is started only when
this method is called the first time.

<p>
The update of the data store runs as background task. With this feature we try to reduce the initialization time
of this <code>UserAgentStringParser</code>, because a network connection is involved and the remote system can be
not available or slow.

<p>
The static class definition {@code OnlineUpdatingParserHolder} within this factory class is <em>not</em>
initialized until the JVM determines that {@code OnlineUpdatingParserHolder} must be executed. The static class
{@code OnlineUpdatingParserHolder} is only executed when the static method {@code getOnlineUserAgentStringParser}
is invoked on the class {@code UADetectorServiceFactory}, and the first time this happens the JVM will load and
initialize the {@code OnlineUpdatingParserHolder} class.

<p>
If during the operation the Internet connection gets lost, then this instance continues to work properly (and
under correct log level settings you will get an corresponding log messages).

@param dataUrl
@param versionUrl
@return an user agent string parser with updating service