/// <summary>
/// No-arg constructor. Instantiates the continuous query and performs initial scan of elements that the remote filter
/// will populate into the node-local groupers within the mutable grid.
/// </summary>
public TAGFileBufferQueueManager(bool runLocally)
{
_log.LogInformation("Establishing Ignite and TAG file buffer queue cache contexts");
// Get the ignite grid and cache references
_ignite = DIContext.Obtain <ITRexGridFactory>()?.Grid(StorageMutability.Mutable) ?? Ignition.GetIgnite(TRexGrids.MutableGridName());
var queueCache = _ignite.GetCache <ITAGFileBufferQueueKey, TAGFileBufferQueueItem>(TRexCaches.TAGFileBufferQueueCacheName());
var handler = new TAGFileBufferQueueItemHandler();
var tagFileFilter = new RemoteTAGFileFilter(handler);
_log.LogInformation("Creating continuous query");
// Construct the continuous query machinery
// Set the initial query to return all elements in the cache
// Instantiate the queryHandle and start the continuous query on the remote nodes
// Note: Only cache items held on this local node will be handled here
_queryHandle = queueCache.QueryContinuous
(qry: new ContinuousQuery <ITAGFileBufferQueueKey, TAGFileBufferQueueItem>(new LocalTAGFileListener(handler))
{
Local = runLocally,
Filter = tagFileFilter
},
initialQry: new ScanQuery <ITAGFileBufferQueueKey, TAGFileBufferQueueItem>
{
Local = runLocally,
Filter = tagFileFilter
});
// Perform the initial query to grab all existing elements and add them to the grouper
// All processing should happen on the remote node in the implementation of the TAGFileFilter remote filter
foreach (var item in _queryHandle.GetInitialQueryCursor())
{
_log.LogError(
$"A cache entry ({item.Key}) from the TAG file buffer queue was passed back to the local scan query rather than intercepted by the remote filter");
}
_log.LogInformation("Completed TAG file buffer queue manager initialization");
}
public RemoteTAGFileFilter(TAGFileBufferQueueItemHandler handler)
{
this.handler = handler;
}
public LocalTAGFileListener(TAGFileBufferQueueItemHandler handler)
{
this._handler = handler;
}
