public EPPreparedQueryResult Execute(
FAFQueryMethodSelect select,
ContextPartitionSelector[] contextPartitionSelectors,
FAFQueryMethodAssignerSetter assignerSetter,
ContextManagementService contextManagementService)
{
var processor = select.Processors[0];
var singleSelector = contextPartitionSelectors != null && contextPartitionSelectors.Length > 0
? contextPartitionSelectors[0]
: null;
var agentInstanceIds = AgentInstanceIds(processor, singleSelector, contextManagementService);
IList<ContextPartitionResult> contextPartitionResults = new List<ContextPartitionResult>();
foreach (var agentInstanceId in agentInstanceIds) {
var processorInstance = processor.GetProcessorInstanceContextById(agentInstanceId);
if (processorInstance != null) {
var coll = processorInstance.SnapshotBestEffort(select.QueryGraph, select.Annotations);
contextPartitionResults.Add(
new ContextPartitionResult(coll, processorInstance.AgentInstanceContext));
}
}
// process context partitions
var events = new ArrayDeque<EventBean[]>();
ResultSetProcessor resultSetProcessor = null;
foreach (var contextPartitionResult in contextPartitionResults) {
if (resultSetProcessor == null) {
resultSetProcessor = ProcessorWithAssign(
select.ResultSetProcessorFactoryProvider,
contextPartitionResult.Context,
assignerSetter,
select.TableAccesses);
}
var snapshot = contextPartitionResult.Events;
if (select.WhereClause != null) {
snapshot = Filtered(
snapshot,
select.WhereClause,
contextPartitionResult.Context);
}
var rows = snapshot.ToArray();
resultSetProcessor.SetAgentInstanceContext(contextPartitionResult.Context);
var results = resultSetProcessor.ProcessViewResult(rows, null, true);
if (results != null && results.First != null && results.First.Length > 0) {
events.Add(results.First);
}
}
var distinct = EventBeanUtility.GetDistinctByProp(
EventBeanUtility.Flatten(events),
select.EventBeanReaderDistinct);
return new EPPreparedQueryResult(select.EventType, distinct);
}
/// <summary>
/// Executes the prepared query.
/// </summary>
/// <returns>query results</returns>
public EPPreparedQueryResult Execute(ContextPartitionSelector[] contextPartitionSelectors)
{
try {
var numStreams = _processors.Length;
if (contextPartitionSelectors != null && contextPartitionSelectors.Length != numStreams)
{
throw new ArgumentException("Number of context partition selectors does not match the number of named windows in the from-clause");
}
// handle non-context case
if (_statementSpec.OptionalContextName == null)
{
ICollection <EventBean>[] snapshots = new ICollection <EventBean> [numStreams];
for (var i = 0; i < numStreams; i++)
{
var selector = contextPartitionSelectors == null ? null : contextPartitionSelectors[i];
snapshots[i] = GetStreamFilterSnapshot(i, selector);
}
_resultSetProcessor.Clear();
return(Process(snapshots));
}
IList <ContextPartitionResult> contextPartitionResults = new List <ContextPartitionResult>();
var singleSelector = contextPartitionSelectors != null && contextPartitionSelectors.Length > 0 ? contextPartitionSelectors[0] : null;
// context partition runtime query
ICollection <int> agentInstanceIds = EPPreparedExecuteMethodHelper.GetAgentInstanceIds(_processors[0], singleSelector, _services.ContextManagementService, _statementSpec.OptionalContextName);
// collect events and agent instances
foreach (int agentInstanceId in agentInstanceIds)
{
var processorInstance = _processors[0].GetProcessorInstanceContextById(agentInstanceId);
if (processorInstance != null)
{
EPPreparedExecuteTableHelper.AssignTableAccessStrategies(_services, _statementSpec.TableNodes, processorInstance.AgentInstanceContext);
var coll = processorInstance.SnapshotBestEffort(this, _filters[0], _statementSpec.Annotations);
contextPartitionResults.Add(new ContextPartitionResult(coll, processorInstance.AgentInstanceContext));
}
}
// process context partitions
var events = new ArrayDeque <EventBean[]>();
foreach (var contextPartitionResult in contextPartitionResults)
{
var snapshot = contextPartitionResult.Events;
if (_statementSpec.FilterRootNode != null)
{
snapshot = GetFiltered(snapshot, Collections.SingletonList(_statementSpec.FilterRootNode));
}
EventBean[] rows = snapshot.ToArray();
_resultSetProcessor.AgentInstanceContext = contextPartitionResult.Context;
var results = _resultSetProcessor.ProcessViewResult(rows, null, true);
if (results != null && results.First != null && results.First.Length > 0)
{
events.Add(results.First);
}
}
return(new EPPreparedQueryResult(_resultSetProcessor.ResultEventType, EventBeanUtility.Flatten(events)));
}
finally {
if (_hasTableAccess)
{
_services.TableService.TableExprEvaluatorContext.ReleaseAcquiredLocks();
}
}
}