Package com.espertech.esper.epl.virtualdw

Examples of com.espertech.esper.epl.virtualdw.VirtualDWView

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     * @return events
     */
    public Collection<EventBean> snapshot(FilterSpecCompiled optionalFilter, Annotation[] annotations) {

        // Determine virtual data window
        VirtualDWView virtualDataWindow = null;
        if (isVirtualDataWindow()) {
            virtualDataWindow = getVirtualDataWindow();
        }

        if (optionalFilter == null || optionalFilter.getParameters().isEmpty()) {
            if (virtualDataWindow != null) {
                Pair<IndexMultiKey,EventTable> pair = virtualDataWindow.getFireAndForgetDesc(Collections.<String>emptySet(), Collections.<String>emptySet());
                return virtualDataWindow.getFireAndForgetData(pair.getSecond(), new Object[0], new RangeIndexLookupValue[0], annotations);
            }
            return null;
        }

        // Determine what straight-equals keys and which ranges are available.
        // Widening/Coercion is part of filter spec compile.
        Set<String> keysAvailable = new HashSet<String>();
        Set<String> rangesAvailable = new HashSet<String>();
        for (FilterSpecParam param : optionalFilter.getParameters()) {
            if (!(param instanceof FilterSpecParamConstant || param instanceof FilterSpecParamRange)) {
                continue;
            }
            if (param.getFilterOperator() == FilterOperator.EQUAL || param.getFilterOperator() == FilterOperator.IS) {
                keysAvailable.add(param.getPropertyName());
            }
            else if (param.getFilterOperator().isRangeOperator() ||
                     param.getFilterOperator().isInvertedRangeOperator() ||
                     param.getFilterOperator().isComparisonOperator()) {
                rangesAvailable.add(param.getPropertyName());
            }
            else if (param.getFilterOperator().isRangeOperator()) {
                rangesAvailable.add(param.getPropertyName());
            }
        }

        // Find an index that matches the needs
        Pair<IndexMultiKey, EventTable> tablePair;
        if (virtualDataWindow != null) {
            tablePair = virtualDataWindow.getFireAndForgetDesc(keysAvailable, rangesAvailable);
        }
        else {
            tablePair = indexRepository.findTable(keysAvailable, rangesAvailable, explicitIndexes);
        }

        if (tablePair == null) {
            if (rootView.isQueryPlanLogging() && rootView.getQueryPlanLog().isInfoEnabled()) {
                rootView.getQueryPlanLog().info("no index found");
            }
            return null;    // indicates table scan
        }

        // Compile key index lookup values
        String[] keyIndexProps = IndexedPropDesc.getIndexProperties(tablePair.getFirst().getHashIndexedProps());
        Object[] keyValues = new Object[keyIndexProps.length];
        for (int keyIndex = 0; keyIndex < keyIndexProps.length; keyIndex++) {
            for (FilterSpecParam param : optionalFilter.getParameters()) {
                if (param.getPropertyName().equals(keyIndexProps[keyIndex])) {
                    keyValues[keyIndex] = param.getFilterValue(null, agentInstanceContext);
                    break;
                }
            }
        }

        // Analyze ranges - these may include key lookup value (EQUALS semantics)
        String[] rangeIndexProps = IndexedPropDesc.getIndexProperties(tablePair.getFirst().getRangeIndexedProps());
        RangeIndexLookupValue[] rangeValues;
        if (rangeIndexProps.length > 0) {
            rangeValues = compileRangeLookupValues(rangeIndexProps, optionalFilter.getParameters());
        }
        else {
            rangeValues = new RangeIndexLookupValue[0];
        }

        if (virtualDataWindow != null) {
            return virtualDataWindow.getFireAndForgetData(tablePair.getSecond(), keyValues, rangeValues, annotations);
        }

        IndexMultiKey indexMultiKey = tablePair.getFirst();
        Set<EventBean> result;
        if (indexMultiKey.getHashIndexedProps().length > 0 && indexMultiKey.getRangeIndexedProps().length == 0) {
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        }

        // Get or Create the table for this index (exact match or property names, type of index and coercion type is expected)
        Pair<IndexMultiKey, EventTable> tableDesc;
        if (isVirtualDataWindow()) {
            VirtualDWView viewExternal = getVirtualDataWindow();
            tableDesc = viewExternal.getSubordinateQueryDesc(hashedProps, btreeProps);
        }
        else {
            if (joinDesc.getHashProps().isEmpty() && joinDesc.getRangeProps().isEmpty()) {
                return null;
            }
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        List<SubordPropRangeKey> rangeKeys = indexKeyInfo.getOrderedRangeDesc();
        CoercionDesc rangeKeyCoercionTypes = indexKeyInfo.getOrderedRangeCoercionTypes();

        SubordTableLookupStrategy lookupStrategy;
        if (isVirtualDataWindow()) {
            VirtualDWView viewExternal = getVirtualDataWindow();
            lookupStrategy = viewExternal.getSubordinateLookupStrategy(accessedByStatementName, accessedByStatementId, accessedByStmtAnnotations, outerStreamTypes,
                    hashKeys, hashKeyCoercionTypes, rangeKeys, rangeKeyCoercionTypes, isNWOnTrigger, eventTable, joinDesc, forceTableScan);
        }
        else {
            if (forceTableScan) {
                lookupStrategy = null;
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            // If this is a virtual data window implementation, bind it to the context for easy lookup
            StopCallback envStopCallback = null;
            if (finalView instanceof VirtualDWView) {
                final String objectName = "/virtualdw/" + windowName;
                final VirtualDWView virtualDWView = (VirtualDWView) finalView;
                try {
                    services.getEngineEnvContext().bind(objectName, virtualDWView.getVirtualDataWindow());
                }
                catch (NamingException e) {
                    throw new ViewProcessingException("Invalid name for adding to context:" + e.getMessage(), e);
                }
                envStopCallback = new StopCallback() {
                    public void stop() {
                        try {
                            virtualDWView.destroy();
                            services.getEngineEnvContext().unbind(objectName);
                        } catch (NamingException e) {}
                    }
                };
            }
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     * @return events
     */
    public Collection<EventBean> snapshot(FilterSpecCompiled optionalFilter, Annotation[] annotations) {

        // Determine virtual data window
        VirtualDWView virtualDataWindow = null;
        if (isVirtualDataWindow()) {
            virtualDataWindow = getVirtualDataWindow();
        }

        if (optionalFilter == null || optionalFilter.getParameters().isEmpty()) {
            if (virtualDataWindow != null) {
                Pair<IndexMultiKey,EventTable> pair = virtualDataWindow.getFireAndForgetDesc(Collections.<String>emptySet(), Collections.<String>emptySet());
                return virtualDataWindow.getFireAndForgetData(pair.getSecond(), new Object[0], new RangeIndexLookupValue[0], annotations);
            }
            return null;
        }

        // Determine what straight-equals keys and which ranges are available.
        // Widening/Coercion is part of filter spec compile.
        Set<String> keysAvailable = new HashSet<String>();
        Set<String> rangesAvailable = new HashSet<String>();
        for (FilterSpecParam param : optionalFilter.getParameters()) {
            if (!(param instanceof FilterSpecParamConstant || param instanceof FilterSpecParamRange)) {
                continue;
            }
            if (param.getFilterOperator() == FilterOperator.EQUAL || param.getFilterOperator() == FilterOperator.IS) {
                keysAvailable.add(param.getLookupable().getExpression());
            }
            else if (param.getFilterOperator().isRangeOperator() ||
                     param.getFilterOperator().isInvertedRangeOperator() ||
                     param.getFilterOperator().isComparisonOperator()) {
                rangesAvailable.add(param.getLookupable().getExpression());
            }
            else if (param.getFilterOperator().isRangeOperator()) {
                rangesAvailable.add(param.getLookupable().getExpression());
            }
        }

        // Find an index that matches the needs
        Pair<IndexMultiKey, EventTable> tablePair;
        if (virtualDataWindow != null) {
            tablePair = virtualDataWindow.getFireAndForgetDesc(keysAvailable, rangesAvailable);
        }
        else {
            tablePair = indexRepository.findTable(keysAvailable, rangesAvailable, explicitIndexes);
        }

        if (tablePair == null) {
            if (rootView.isQueryPlanLogging() && rootView.getQueryPlanLog().isInfoEnabled()) {
                rootView.getQueryPlanLog().info("no index found");
            }
            return null;    // indicates table scan
        }

        // Compile key index lookup values
        String[] keyIndexProps = IndexedPropDesc.getIndexProperties(tablePair.getFirst().getHashIndexedProps());
        Object[] keyValues = new Object[keyIndexProps.length];
        for (int keyIndex = 0; keyIndex < keyIndexProps.length; keyIndex++) {
            for (FilterSpecParam param : optionalFilter.getParameters()) {
                if (param.getLookupable().getExpression().equals(keyIndexProps[keyIndex])) {
                    keyValues[keyIndex] = param.getFilterValue(null, agentInstanceContext);
                    break;
                }
            }
        }

        // Analyze ranges - these may include key lookup value (EQUALS semantics)
        String[] rangeIndexProps = IndexedPropDesc.getIndexProperties(tablePair.getFirst().getRangeIndexedProps());
        RangeIndexLookupValue[] rangeValues;
        if (rangeIndexProps.length > 0) {
            rangeValues = compileRangeLookupValues(rangeIndexProps, optionalFilter.getParameters());
        }
        else {
            rangeValues = new RangeIndexLookupValue[0];
        }

        if (virtualDataWindow != null) {
            return virtualDataWindow.getFireAndForgetData(tablePair.getSecond(), keyValues, rangeValues, annotations);
        }

        IndexMultiKey indexMultiKey = tablePair.getFirst();
        Set<EventBean> result;
        if (indexMultiKey.getHashIndexedProps().length > 0 && indexMultiKey.getRangeIndexedProps().length == 0) {
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        }

        // Get or Create the table for this index (exact match or property names, type of index and coercion type is expected)
        Pair<IndexMultiKey, EventTable> tableDesc;
        if (isVirtualDataWindow()) {
            VirtualDWView viewExternal = getVirtualDataWindow();
            tableDesc = viewExternal.getSubordinateQueryDesc(hashedProps, btreeProps);
        }
        else {
            if (joinDesc.getHashProps().isEmpty() && joinDesc.getRangeProps().isEmpty()) {
                return null;
            }
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        List<SubordPropRangeKey> rangeKeys = indexKeyInfo.getOrderedRangeDesc();
        CoercionDesc rangeKeyCoercionTypes = indexKeyInfo.getOrderedRangeCoercionTypes();

        SubordTableLookupStrategy lookupStrategy;
        if (isVirtualDataWindow()) {
            VirtualDWView viewExternal = getVirtualDataWindow();
            lookupStrategy = viewExternal.getSubordinateLookupStrategy(accessedByStatementName, accessedByStatementId, accessedByStmtAnnotations, outerStreamTypes,
                    hashKeys, hashKeyCoercionTypes, rangeKeys, rangeKeyCoercionTypes, isNWOnTrigger, eventTable, joinDesc, forceTableScan);
        }
        else {
            if (forceTableScan) {
                lookupStrategy = null;
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        }
        final NamedWindowProcessorInstance processorInstance = processor.getProcessorInstance(getDefaultAgentInstanceContext());

        EPStatementStopMethod stopMethod;
        if (processor.isVirtualDataWindow()) {
            final VirtualDWView virtualDWView = processorInstance.getRootViewInstance().getVirtualDataWindow();
            virtualDWView.handleStartIndex(spec);
            stopMethod = new EPStatementStopMethod() {
                public void stop() {
                    virtualDWView.handleStopIndex(spec);
                }
            };
        }
        else {
            processorInstance.getRootViewInstance().addExplicitIndex(spec.getWindowName(), spec.getIndexName(), spec.getColumns());
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            // If this is a virtual data window implementation, bind it to the context for easy lookup
            StopCallback envStopCallback = null;
            if (finalView instanceof VirtualDWView) {
                final String objectName = "/virtualdw/" + windowName;
                final VirtualDWView virtualDWView = (VirtualDWView) finalView;
                try {
                    services.getEngineEnvContext().bind(objectName, virtualDWView.getVirtualDataWindow());
                }
                catch (NamingException e) {
                    throw new ViewProcessingException("Invalid name for adding to context:" + e.getMessage(), e);
                }
                envStopCallback = new StopCallback() {
                    public void stop() {
                        try {
                            virtualDWView.destroy();
                            services.getEngineEnvContext().unbind(objectName);
                        } catch (NamingException e) {}
                    }
                };
            }
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     * @return events
     */
    public Collection<EventBean> snapshot(FilterSpecCompiled optionalFilter, Annotation[] annotations) {

        // Determine virtual data window
        VirtualDWView virtualDataWindow = null;
        if (isVirtualDataWindow()) {
            virtualDataWindow = getVirtualDataWindow();
        }

        if (optionalFilter == null || optionalFilter.getParameters().isEmpty()) {
            if (virtualDataWindow != null) {
                Pair<IndexMultiKey,EventTable> pair = virtualDataWindow.getFireAndForgetDesc(Collections.<String>emptySet(), Collections.<String>emptySet());
                return virtualDataWindow.getFireAndForgetData(pair.getSecond(), new Object[0], new RangeIndexLookupValue[0], annotations);
            }
            return null;
        }

        // Determine what straight-equals keys and which ranges are available.
        // Widening/Coercion is part of filter spec compile.
        Set<String> keysAvailable = new HashSet<String>();
        Set<String> rangesAvailable = new HashSet<String>();
        for (FilterSpecParam param : optionalFilter.getParameters()) {
            if (!(param instanceof FilterSpecParamConstant || param instanceof FilterSpecParamRange)) {
                continue;
            }
            if (param.getFilterOperator() == FilterOperator.EQUAL || param.getFilterOperator() == FilterOperator.IS) {
                keysAvailable.add(param.getLookupable().getExpression());
            }
            else if (param.getFilterOperator().isRangeOperator() ||
                     param.getFilterOperator().isInvertedRangeOperator() ||
                     param.getFilterOperator().isComparisonOperator()) {
                rangesAvailable.add(param.getLookupable().getExpression());
            }
            else if (param.getFilterOperator().isRangeOperator()) {
                rangesAvailable.add(param.getLookupable().getExpression());
            }
        }

        // Find an index that matches the needs
        Pair<IndexMultiKey, EventTable> tablePair;
        if (virtualDataWindow != null) {
            tablePair = virtualDataWindow.getFireAndForgetDesc(keysAvailable, rangesAvailable);
        }
        else {
            tablePair = indexRepository.findTable(keysAvailable, rangesAvailable, explicitIndexes);
        }

        if (tablePair == null) {
            if (rootView.isQueryPlanLogging() && rootView.getQueryPlanLog().isInfoEnabled()) {
                rootView.getQueryPlanLog().info("no index found");
            }
            return null;    // indicates table scan
        }

        // Compile key index lookup values
        String[] keyIndexProps = IndexedPropDesc.getIndexProperties(tablePair.getFirst().getHashIndexedProps());
        Object[] keyValues = new Object[keyIndexProps.length];
        for (int keyIndex = 0; keyIndex < keyIndexProps.length; keyIndex++) {
            for (FilterSpecParam param : optionalFilter.getParameters()) {
                if (param.getLookupable().getExpression().equals(keyIndexProps[keyIndex])) {
                    keyValues[keyIndex] = param.getFilterValue(null, agentInstanceContext);
                    break;
                }
            }
        }

        // Analyze ranges - these may include key lookup value (EQUALS semantics)
        String[] rangeIndexProps = IndexedPropDesc.getIndexProperties(tablePair.getFirst().getRangeIndexedProps());
        RangeIndexLookupValue[] rangeValues;
        if (rangeIndexProps.length > 0) {
            rangeValues = compileRangeLookupValues(rangeIndexProps, optionalFilter.getParameters());
        }
        else {
            rangeValues = new RangeIndexLookupValue[0];
        }

        if (virtualDataWindow != null) {
            return virtualDataWindow.getFireAndForgetData(tablePair.getSecond(), keyValues, rangeValues, annotations);
        }

        IndexMultiKey indexMultiKey = tablePair.getFirst();
        Set<EventBean> result;
        if (indexMultiKey.getHashIndexedProps().length > 0 && indexMultiKey.getRangeIndexedProps().length == 0) {
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