How can I change the twitter query for a search-inbound-channel-adapter?

[Erich]

Hi, I'm very new to Spring Integration... I'm using STS, and I created a Spring Template Project, the Spring Integration Project (War) twitter example. It contains the following in spring-integration-context.xml

    <int-twitter:search-inbound-channel-adapter
		id="twitter" query="#springintegration"
		channel="twitterChannel" auto-startup="false">
		<int:poller fixed-rate="5000" max-messages-per-poll="10" />
	</int-twitter:search-inbound-channel-adapter>

How can I programatically change the twitter query on the fly for this channel adapter ?

(I'm using the standard DefaultTwitterService that is generated)

Thanks for your time,
Erich

[Gary Russell]

The twitter adapter does not currently (via configuration) support a variable search query.

Seems like a reasonable improvement to use a SpEL expression - please open a JIRA ticket...

https://jira.springsource.org/browse/INT

You can do it programmatically, though; get a reference to the SourcePollingChannelAdapter bean named 'twitter' in your example; and use reflection to get the SearchReceivingMessageSource (in the source field). You can then call setQuery() and the new query will be used on the next poll.

Spring provides a DirectFieldAccessor to conveniently get a reference to the source field.

[ghillert]

Hi,

Just FYI - We have an open issue regarding providing Twitter Outbound Gateways, which would allow you to trigger Twitter operations using command messages.

https://jira.springsource.org/browse/INT-1939

However, it would not cover SpEL expression support, which in your case might be the more desired approach.

Without using reflection, you also have have option to pass a new 'SearchReceivingMessageSource' into the 'PollingChannelAdapter':

@Autowired
@Qualifier("twitterSearch")
private SourcePollingChannelAdapter sourcePollingChannelAdapter;
...
SearchReceivingMessageSource source = new SearchReceivingMessageSource(twitterTemplate);
source.afterPropertiesSet();
source.setQuery("#springintegration");
sourcePollingChannelAdapter.setSource(source);
...

Cheers,

Gunnar

[Erich]

Thanks Gary and Gunnar, your responses were very helpful.

I was able to achieve what I was looking to do through both of your suggestions.

I have logged INT-2789 for the addition of SpEL config for the twitter adapter query.

Thanks,
Erich