Examples with WEvtApi org.apache.nifi.processors.windows.event.log.jna.WEvtApi used on opensource projects

Example 1 with WEvtApi

use of org.apache.nifi.processors.windows.event.log.jna.WEvtApi in project nifi by apache.

the class ConsumeWindowsEventLog method subscribe.

/**
 * Register subscriber via native call
 *
 * @param context the process context
 */
private String subscribe(ProcessContext context) throws URISyntaxException {
    String channel = context.getProperty(CHANNEL).getValue();
    String query = context.getProperty(QUERY).getValue();
    renderedXMLs = new LinkedBlockingQueue<>(context.getProperty(MAX_EVENT_QUEUE_SIZE).asInteger());
    provenanceUri = new URI("winlog", name, "/" + channel, query, null).toASCIIString();
    evtSubscribeCallback = new EventSubscribeXmlRenderingCallback(getLogger(), s -> {
        try {
            renderedXMLs.put(s);
        } catch (InterruptedException e) {
            throw new IllegalStateException("Got interrupted while waiting to add to queue.", e);
        }
    }, context.getProperty(MAX_BUFFER_SIZE).asInteger(), wEvtApi, kernel32, errorLookup);
    subscriptionHandle = wEvtApi.EvtSubscribe(null, null, channel, query, null, null, evtSubscribeCallback, WEvtApi.EvtSubscribeFlags.SUBSCRIBE_TO_FUTURE | WEvtApi.EvtSubscribeFlags.EVT_SUBSCRIBE_STRICT);
    if (!isSubscribed()) {
        return UNABLE_TO_SUBSCRIBE + errorLookup.getLastError();
    }
    return null;
}