Examples of CreateVariableDesc

Examples of com.espertech.esper.epl.spec.CreateVariableDesc

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    public EPStatementStartMethodCreateVariable(StatementSpecCompiled statementSpec) {
        super(statementSpec);
    }

    public EPStatementStartResult startInternal(final EPServicesContext services, final StatementContext statementContext, boolean isNewStatement, boolean isRecoveringStatement, boolean isRecoveringResilient) throws ExprValidationException, ViewProcessingException {
        final CreateVariableDesc createDesc = statementSpec.getCreateVariableDesc();

        // Get assignment value
        Object value = null;
        if (createDesc.getAssignment() != null)
        {
            // Evaluate assignment expression
            StreamTypeService typeService = new StreamTypeServiceImpl(new EventType[0], new String[0], new boolean[0], services.getEngineURI(), false);
            ExprEvaluatorContextStatement evaluatorContextStmt = new ExprEvaluatorContextStatement(statementContext);
            ExprValidationContext validationContext = new ExprValidationContext(typeService, statementContext.getMethodResolutionService(), null, statementContext.getSchedulingService(), statementContext.getVariableService(), evaluatorContextStmt, statementContext.getEventAdapterService(), statementContext.getStatementName(), statementContext.getStatementId(), statementContext.getAnnotations(), statementContext.getContextDescriptor(), false);
            ExprNode validated = ExprNodeUtility.getValidatedSubtree(createDesc.getAssignment(), validationContext);
            value = validated.getExprEvaluator().evaluate(null, true, evaluatorContextStmt);
        }

        // Create variable
        try
        {
            services.getVariableService().createNewVariable(createDesc.getVariableName(), createDesc.getVariableType(), value, createDesc.isConstant(), createDesc.isArray(), statementContext.getExtensionServicesContext(), services.getEngineImportService());
        }
        catch (VariableExistsException ex)
        {
            // for new statement we don't allow creating the same variable
            if (isNewStatement)
            {
                throw new ExprValidationException("Cannot create variable: " + ex.getMessage(), ex);
            }
        }
        catch (VariableDeclarationException ex)
        {
            throw new ExprValidationException("Cannot create variable: " + ex.getMessage(), ex);
        }

        final CreateVariableView createView = new CreateVariableView(statementContext.getStatementId(), services.getEventAdapterService(), services.getVariableService(), createDesc.getVariableName(), statementContext.getStatementResultService());
        final int variableNum = services.getVariableService().getReader(createDesc.getVariableName()).getVariableNumber();
        services.getVariableService().registerCallback(variableNum, createView);
        statementContext.getStatementStopService().addSubscriber(new StatementStopCallback() {
            public void statementStopped()
            {
                services.getVariableService().unregisterCallback(variableNum, createView);
            }
        });

        // Create result set processor, use wildcard selection
        statementSpec.getSelectClauseSpec().setSelectExprList(new SelectClauseElementWildcard());
        statementSpec.setSelectStreamDirEnum(SelectClauseStreamSelectorEnum.RSTREAM_ISTREAM_BOTH);
        StreamTypeService typeService = new StreamTypeServiceImpl(new EventType[] {createView.getEventType()}, new String[] {"create_variable"}, new boolean[] {true}, services.getEngineURI(), false);
        AgentInstanceContext agentInstanceContext = getDefaultAgentInstanceContext(statementContext);
        ResultSetProcessorFactoryDesc resultSetProcessorPrototype = ResultSetProcessorFactoryFactory.getProcessorPrototype(
                statementSpec, statementContext, typeService, null, new boolean[0], true, ContextPropertyRegistryImpl.EMPTY_REGISTRY, null);
        ResultSetProcessor resultSetProcessor = EPStatementStartMethodHelperAssignExpr.getAssignResultSetProcessor(agentInstanceContext, resultSetProcessorPrototype);

        // Attach output view
        OutputProcessViewFactory outputViewFactory = OutputProcessViewFactoryFactory.make(statementSpec, services.getInternalEventRouter(), agentInstanceContext.getStatementContext(), resultSetProcessor.getResultEventType(), null);
        OutputProcessViewBase outputView = outputViewFactory.makeView(resultSetProcessor, agentInstanceContext);
        createView.addView(outputView);

        services.getStatementVariableRefService().addReferences(statementContext.getStatementName(), Collections.singleton(createDesc.getVariableName()));
        EPStatementDestroyMethod destroyMethod = new EPStatementDestroyMethod() {
            public void destroy() {
                try {
                    services.getStatementVariableRefService().removeReferencesStatement(statementContext.getStatementName());
                }
                catch (RuntimeException ex) {
                    log.error("Error removing variable '" + createDesc.getVariableName() + "': " + ex.getMessage());
                }
            }
        };

        EPStatementStopMethod stopMethod = new EPStatementStopMethod(){
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Examples of com.espertech.esper.epl.spec.CreateVariableDesc

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    public EPStatementStartMethodCreateVariable(StatementSpecCompiled statementSpec, EPServicesContext services, StatementContext statementContext) {
        super(statementSpec, services, statementContext);
    }

    public EPStatementStartResult startInternal(boolean isNewStatement, boolean isRecoveringStatement, boolean isRecoveringResilient) throws ExprValidationException, ViewProcessingException {
        final CreateVariableDesc createDesc = statementSpec.getCreateVariableDesc();

        // Get assignment value
        Object value = null;
        if (createDesc.getAssignment() != null)
        {
            // Evaluate assignment expression
            StreamTypeService typeService = new StreamTypeServiceImpl(new EventType[0], new String[0], new boolean[0], services.getEngineURI(), false);
            ExprEvaluatorContextStatement evaluatorContextStmt = new ExprEvaluatorContextStatement(statementContext);
            ExprValidationContext validationContext = new ExprValidationContext(typeService, statementContext.getMethodResolutionService(), null, statementContext.getSchedulingService(), statementContext.getVariableService(), evaluatorContextStmt, statementContext.getEventAdapterService(), statementContext.getStatementName(), statementContext.getStatementId(), statementContext.getAnnotations(), statementContext.getContextDescriptor());
            ExprNode validated = ExprNodeUtility.getValidatedSubtree(createDesc.getAssignment(), validationContext);
            value = validated.getExprEvaluator().evaluate(null, true, evaluatorContextStmt);
        }

        // Create variable
        try
        {
            services.getVariableService().createNewVariable(createDesc.getVariableName(), createDesc.getVariableType(), value, statementContext.getExtensionServicesContext());
        }
        catch (VariableExistsException ex)
        {
            // for new statement we don't allow creating the same variable
            if (isNewStatement)
            {
                throw new ExprValidationException("Cannot create variable: " + ex.getMessage());
            }
        }
        catch (VariableDeclarationException ex)
        {
            throw new ExprValidationException("Cannot create variable: " + ex.getMessage());
        }

        final CreateVariableView createView = new CreateVariableView(statementContext.getStatementId(), services.getEventAdapterService(), services.getVariableService(), createDesc.getVariableName(), statementContext.getStatementResultService());
        final int variableNum = services.getVariableService().getReader(createDesc.getVariableName()).getVariableNumber();
        services.getVariableService().registerCallback(variableNum, createView);
        statementContext.getStatementStopService().addSubscriber(new StatementStopCallback() {
            public void statementStopped()
            {
                services.getVariableService().unregisterCallback(variableNum, createView);
            }
        });

        // Create result set processor, use wildcard selection
        statementSpec.getSelectClauseSpec().getSelectExprList().clear();
        statementSpec.getSelectClauseSpec().add(new SelectClauseElementWildcard());
        statementSpec.setSelectStreamDirEnum(SelectClauseStreamSelectorEnum.RSTREAM_ISTREAM_BOTH);
        StreamTypeService typeService = new StreamTypeServiceImpl(new EventType[] {createView.getEventType()}, new String[] {"create_variable"}, new boolean[] {true}, services.getEngineURI(), false);
        AgentInstanceContext agentInstanceContext = getDefaultAgentInstanceContext();
        ResultSetProcessorFactoryDesc resultSetProcessorPrototype = ResultSetProcessorFactoryFactory.getProcessorPrototype(
                statementSpec, agentInstanceContext, typeService, null, new boolean[0], true, ContextPropertyRegistryImpl.EMPTY_REGISTRY);
        ResultSetProcessor resultSetProcessor = EPStatementStartMethodHelperAssignExpr.getAssignResultSetProcessor(agentInstanceContext, resultSetProcessorPrototype);

        // Attach output view
        OutputProcessViewFactory outputViewFactory = OutputProcessViewFactoryFactory.make(statementSpec, services.getInternalEventRouter(), agentInstanceContext.getStatementContext(), resultSetProcessor.getResultEventType());
        OutputProcessViewBase outputView = outputViewFactory.makeView(resultSetProcessor, agentInstanceContext);
        createView.addView(outputView);

        services.getStatementVariableRefService().addReferences(statementContext.getStatementName(), Collections.singleton(createDesc.getVariableName()));
        EPStatementDestroyMethod destroyMethod = new EPStatementDestroyMethod() {
            public void destroy() {
                try {
                    services.getStatementVariableRefService().removeReferencesStatement(statementContext.getStatementName());
                }
                catch (RuntimeException ex) {
                    log.error("Error removing variable '" + createDesc.getVariableName() + "': " + ex.getMessage());
                }
            }
        };

        EPStatementStopMethod stopMethod = new EPStatementStopMethod(){
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Examples of com.espertech.esper.epl.spec.CreateVariableDesc

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    public EPStatementStartMethodCreateVariable(StatementSpecCompiled statementSpec, EPServicesContext services, StatementContext statementContext) {
        super(statementSpec, services, statementContext);
    }

    public EPStatementStartResult startInternal(boolean isNewStatement, boolean isRecoveringStatement, boolean isRecoveringResilient) throws ExprValidationException, ViewProcessingException {
        final CreateVariableDesc createDesc = statementSpec.getCreateVariableDesc();

        // Get assignment value
        Object value = null;
        if (createDesc.getAssignment() != null)
        {
            // Evaluate assignment expression
            StreamTypeService typeService = new StreamTypeServiceImpl(new EventType[0], new String[0], new boolean[0], services.getEngineURI(), false);
            ExprEvaluatorContextStatement evaluatorContextStmt = new ExprEvaluatorContextStatement(statementContext);
            ExprValidationContext validationContext = new ExprValidationContext(typeService, statementContext.getMethodResolutionService(), null, statementContext.getSchedulingService(), statementContext.getVariableService(), evaluatorContextStmt, statementContext.getEventAdapterService(), statementContext.getStatementName(), statementContext.getStatementId(), statementContext.getAnnotations(), statementContext.getContextDescriptor());
            ExprNode validated = ExprNodeUtility.getValidatedSubtree(createDesc.getAssignment(), validationContext);
            value = validated.getExprEvaluator().evaluate(null, true, evaluatorContextStmt);
        }

        // Create variable
        try
        {
            services.getVariableService().createNewVariable(createDesc.getVariableName(), createDesc.getVariableType(), value, createDesc.isConstant(), statementContext.getExtensionServicesContext());
        }
        catch (VariableExistsException ex)
        {
            // for new statement we don't allow creating the same variable
            if (isNewStatement)
            {
                throw new ExprValidationException("Cannot create variable: " + ex.getMessage());
            }
        }
        catch (VariableDeclarationException ex)
        {
            throw new ExprValidationException("Cannot create variable: " + ex.getMessage());
        }

        final CreateVariableView createView = new CreateVariableView(statementContext.getStatementId(), services.getEventAdapterService(), services.getVariableService(), createDesc.getVariableName(), statementContext.getStatementResultService());
        final int variableNum = services.getVariableService().getReader(createDesc.getVariableName()).getVariableNumber();
        services.getVariableService().registerCallback(variableNum, createView);
        statementContext.getStatementStopService().addSubscriber(new StatementStopCallback() {
            public void statementStopped()
            {
                services.getVariableService().unregisterCallback(variableNum, createView);
            }
        });

        // Create result set processor, use wildcard selection
        statementSpec.getSelectClauseSpec().getSelectExprList().clear();
        statementSpec.getSelectClauseSpec().add(new SelectClauseElementWildcard());
        statementSpec.setSelectStreamDirEnum(SelectClauseStreamSelectorEnum.RSTREAM_ISTREAM_BOTH);
        StreamTypeService typeService = new StreamTypeServiceImpl(new EventType[] {createView.getEventType()}, new String[] {"create_variable"}, new boolean[] {true}, services.getEngineURI(), false);
        AgentInstanceContext agentInstanceContext = getDefaultAgentInstanceContext();
        ResultSetProcessorFactoryDesc resultSetProcessorPrototype = ResultSetProcessorFactoryFactory.getProcessorPrototype(
                statementSpec, statementContext, typeService, null, new boolean[0], true, ContextPropertyRegistryImpl.EMPTY_REGISTRY, null);
        ResultSetProcessor resultSetProcessor = EPStatementStartMethodHelperAssignExpr.getAssignResultSetProcessor(agentInstanceContext, resultSetProcessorPrototype);

        // Attach output view
        OutputProcessViewFactory outputViewFactory = OutputProcessViewFactoryFactory.make(statementSpec, services.getInternalEventRouter(), agentInstanceContext.getStatementContext(), resultSetProcessor.getResultEventType(), null);
        OutputProcessViewBase outputView = outputViewFactory.makeView(resultSetProcessor, agentInstanceContext);
        createView.addView(outputView);

        services.getStatementVariableRefService().addReferences(statementContext.getStatementName(), Collections.singleton(createDesc.getVariableName()));
        EPStatementDestroyMethod destroyMethod = new EPStatementDestroyMethod() {
            public void destroy() {
                try {
                    services.getStatementVariableRefService().removeReferencesStatement(statementContext.getStatementName());
                }
                catch (RuntimeException ex) {
                    log.error("Error removing variable '" + createDesc.getVariableName() + "': " + ex.getMessage());
                }
            }
        };

        EPStatementStopMethod stopMethod = new EPStatementStopMethod(){
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Examples of com.espertech.esper.epl.spec.CreateVariableDesc

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    public EPStatementStartMethodCreateVariable(StatementSpecCompiled statementSpec) {
        super(statementSpec);
    }

    public EPStatementStartResult startInternal(final EPServicesContext services, final StatementContext statementContext, boolean isNewStatement, boolean isRecoveringStatement, boolean isRecoveringResilient) throws ExprValidationException, ViewProcessingException {
        final CreateVariableDesc createDesc = statementSpec.getCreateVariableDesc();

        // Get assignment value
        Object value = null;
        if (createDesc.getAssignment() != null)
        {
            // Evaluate assignment expression
            StreamTypeService typeService = new StreamTypeServiceImpl(new EventType[0], new String[0], new boolean[0], services.getEngineURI(), false);
            ExprEvaluatorContextStatement evaluatorContextStmt = new ExprEvaluatorContextStatement(statementContext);
            ExprValidationContext validationContext = new ExprValidationContext(typeService, statementContext.getMethodResolutionService(), null, statementContext.getSchedulingService(), statementContext.getVariableService(), evaluatorContextStmt, statementContext.getEventAdapterService(), statementContext.getStatementName(), statementContext.getStatementId(), statementContext.getAnnotations(), statementContext.getContextDescriptor(), false, false);
            ExprNode validated = ExprNodeUtility.getValidatedSubtree(ExprNodeOrigin.VARIABLEASSIGN, createDesc.getAssignment(), validationContext);
            value = validated.getExprEvaluator().evaluate(null, true, evaluatorContextStmt);
        }

        // Create variable
        try {
            services.getVariableService().createNewVariable(statementSpec.getOptionalContextName(), createDesc.getVariableName(), createDesc.getVariableType(), createDesc.isConstant(), createDesc.isArray(), value, services.getEngineImportService());
        }
        catch (VariableExistsException ex) {
            // for new statement we don't allow creating the same variable
            if (isNewStatement) {
                throw new ExprValidationException("Cannot create variable: " + ex.getMessage(), ex);
            }
        }
        catch (VariableDeclarationException ex) {
            throw new ExprValidationException("Cannot create variable: " + ex.getMessage(), ex);
        }

        EPStatementDestroyMethod destroyMethod = new EPStatementDestroyMethod() {
            public void destroy() {
                try {
                    services.getStatementVariableRefService().removeReferencesStatement(statementContext.getStatementName());
                }
                catch (RuntimeException ex) {
                    log.error("Error removing variable '" + createDesc.getVariableName() + "': " + ex.getMessage());
                }
            }
        };

        EPStatementStopMethod stopMethod = new EPStatementStopMethod(){
            public void stop()
            {
            }
        };

        VariableMetaData variableMetaData = services.getVariableService().getVariableMetaData(createDesc.getVariableName());
        Viewable outputView;

        if (statementSpec.getOptionalContextName() != null) {
            EventType eventType = CreateVariableView.getEventType(statementContext.getStatementId(), services.getEventAdapterService(), variableMetaData);
            StatementAgentInstanceFactoryCreateVariable contextFactory = new StatementAgentInstanceFactoryCreateVariable(statementContext, services, variableMetaData, eventType);
            ContextMergeView mergeView = new ContextMergeView(eventType);
            outputView = mergeView;
            ContextManagedStatementCreateVariableDesc statement = new ContextManagedStatementCreateVariableDesc(statementSpec, statementContext, mergeView, contextFactory);
            services.getContextManagementService().addStatement(statementSpec.getOptionalContextName(), statement, isRecoveringResilient);
        }
        else {
            // allocate
            services.getVariableService().allocateVariableState(createDesc.getVariableName(), VariableService.NOCONTEXT_AGENTINSTANCEID, statementContext.getExtensionServicesContext());
            final CreateVariableView createView = new CreateVariableView(statementContext.getStatementId(), services.getEventAdapterService(), services.getVariableService(), createDesc.getVariableName(), statementContext.getStatementResultService());

            services.getVariableService().registerCallback(createDesc.getVariableName(), 0, createView);
            statementContext.getStatementStopService().addSubscriber(new StatementStopCallback() {
                public void statementStopped()
                {
                    services.getVariableService().unregisterCallback(createDesc.getVariableName(), 0, createView);
                }
            });

            // Create result set processor, use wildcard selection
            statementSpec.getSelectClauseSpec().setSelectExprList(new SelectClauseElementWildcard());
            statementSpec.setSelectStreamDirEnum(SelectClauseStreamSelectorEnum.RSTREAM_ISTREAM_BOTH);
            StreamTypeService typeService = new StreamTypeServiceImpl(new EventType[] {createView.getEventType()}, new String[] {"create_variable"}, new boolean[] {true}, services.getEngineURI(), false);
            AgentInstanceContext agentInstanceContext = getDefaultAgentInstanceContext(statementContext);
            ResultSetProcessorFactoryDesc resultSetProcessorPrototype = ResultSetProcessorFactoryFactory.getProcessorPrototype(
                    statementSpec, statementContext, typeService, null, new boolean[0], true, ContextPropertyRegistryImpl.EMPTY_REGISTRY, null);
            ResultSetProcessor resultSetProcessor = EPStatementStartMethodHelperAssignExpr.getAssignResultSetProcessor(agentInstanceContext, resultSetProcessorPrototype);

            // Attach output view
            OutputProcessViewFactory outputViewFactory = OutputProcessViewFactoryFactory.make(statementSpec, services.getInternalEventRouter(), agentInstanceContext.getStatementContext(), resultSetProcessor.getResultEventType(), null);
            OutputProcessViewBase outputViewBase = outputViewFactory.makeView(resultSetProcessor, agentInstanceContext);
            createView.addView(outputViewBase);
            outputView = outputViewBase;

            services.getStatementVariableRefService().addReferences(statementContext.getStatementName(), Collections.singleton(createDesc.getVariableName()));
        }

        return new EPStatementStartResult(outputView, stopMethod, destroyMethod);
    }
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Examples of com.espertech.esper.epl.spec.CreateVariableDesc

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    public EPStatementStartMethodCreateVariable(StatementSpecCompiled statementSpec, EPServicesContext services, StatementContext statementContext) {
        super(statementSpec, services, statementContext);
    }

    public EPStatementStartResult startInternal(boolean isNewStatement, boolean isRecoveringStatement, boolean isRecoveringResilient) throws ExprValidationException, ViewProcessingException {
        final CreateVariableDesc createDesc = statementSpec.getCreateVariableDesc();

        // Get assignment value
        Object value = null;
        if (createDesc.getAssignment() != null)
        {
            // Evaluate assignment expression
            StreamTypeService typeService = new StreamTypeServiceImpl(new EventType[0], new String[0], new boolean[0], services.getEngineURI(), false);
            ExprEvaluatorContextStatement evaluatorContextStmt = new ExprEvaluatorContextStatement(statementContext);
            ExprValidationContext validationContext = new ExprValidationContext(typeService, statementContext.getMethodResolutionService(), null, statementContext.getSchedulingService(), statementContext.getVariableService(), evaluatorContextStmt, statementContext.getEventAdapterService(), statementContext.getStatementName(), statementContext.getStatementId(), statementContext.getAnnotations(), statementContext.getContextDescriptor());
            ExprNode validated = ExprNodeUtility.getValidatedSubtree(createDesc.getAssignment(), validationContext);
            value = validated.getExprEvaluator().evaluate(null, true, evaluatorContextStmt);
        }

        // Create variable
        try
        {
            services.getVariableService().createNewVariable(createDesc.getVariableName(), createDesc.getVariableType(), value, createDesc.isConstant(), statementContext.getExtensionServicesContext());
        }
        catch (VariableExistsException ex)
        {
            // for new statement we don't allow creating the same variable
            if (isNewStatement)
            {
                throw new ExprValidationException("Cannot create variable: " + ex.getMessage());
            }
        }
        catch (VariableDeclarationException ex)
        {
            throw new ExprValidationException("Cannot create variable: " + ex.getMessage());
        }

        final CreateVariableView createView = new CreateVariableView(statementContext.getStatementId(), services.getEventAdapterService(), services.getVariableService(), createDesc.getVariableName(), statementContext.getStatementResultService());
        final int variableNum = services.getVariableService().getReader(createDesc.getVariableName()).getVariableNumber();
        services.getVariableService().registerCallback(variableNum, createView);
        statementContext.getStatementStopService().addSubscriber(new StatementStopCallback() {
            public void statementStopped()
            {
                services.getVariableService().unregisterCallback(variableNum, createView);
            }
        });

        // Create result set processor, use wildcard selection
        statementSpec.getSelectClauseSpec().getSelectExprList().clear();
        statementSpec.getSelectClauseSpec().add(new SelectClauseElementWildcard());
        statementSpec.setSelectStreamDirEnum(SelectClauseStreamSelectorEnum.RSTREAM_ISTREAM_BOTH);
        StreamTypeService typeService = new StreamTypeServiceImpl(new EventType[] {createView.getEventType()}, new String[] {"create_variable"}, new boolean[] {true}, services.getEngineURI(), false);
        AgentInstanceContext agentInstanceContext = getDefaultAgentInstanceContext();
        ResultSetProcessorFactoryDesc resultSetProcessorPrototype = ResultSetProcessorFactoryFactory.getProcessorPrototype(
                statementSpec, statementContext, typeService, null, new boolean[0], true, ContextPropertyRegistryImpl.EMPTY_REGISTRY);
        ResultSetProcessor resultSetProcessor = EPStatementStartMethodHelperAssignExpr.getAssignResultSetProcessor(agentInstanceContext, resultSetProcessorPrototype);

        // Attach output view
        OutputProcessViewFactory outputViewFactory = OutputProcessViewFactoryFactory.make(statementSpec, services.getInternalEventRouter(), agentInstanceContext.getStatementContext(), resultSetProcessor.getResultEventType());
        OutputProcessViewBase outputView = outputViewFactory.makeView(resultSetProcessor, agentInstanceContext);
        createView.addView(outputView);

        services.getStatementVariableRefService().addReferences(statementContext.getStatementName(), Collections.singleton(createDesc.getVariableName()));
        EPStatementDestroyMethod destroyMethod = new EPStatementDestroyMethod() {
            public void destroy() {
                try {
                    services.getStatementVariableRefService().removeReferencesStatement(statementContext.getStatementName());
                }
                catch (RuntimeException ex) {
                    log.error("Error removing variable '" + createDesc.getVariableName() + "': " + ex.getMessage());
                }
            }
        };

        EPStatementStopMethod stopMethod = new EPStatementStopMethod(){
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Examples of com.espertech.esper.epl.spec.CreateVariableDesc

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    public EPStatementStartMethodCreateVariable(StatementSpecCompiled statementSpec, EPServicesContext services, StatementContext statementContext) {
        super(statementSpec, services, statementContext);
    }

    public EPStatementStartResult startInternal(boolean isNewStatement, boolean isRecoveringStatement, boolean isRecoveringResilient) throws ExprValidationException, ViewProcessingException {
        final CreateVariableDesc createDesc = statementSpec.getCreateVariableDesc();

        // Get assignment value
        Object value = null;
        if (createDesc.getAssignment() != null)
        {
            // Evaluate assignment expression
            StreamTypeService typeService = new StreamTypeServiceImpl(new EventType[0], new String[0], new boolean[0], services.getEngineURI(), false);
            ExprEvaluatorContextStatement evaluatorContextStmt = new ExprEvaluatorContextStatement(statementContext);
            ExprValidationContext validationContext = new ExprValidationContext(typeService, statementContext.getMethodResolutionService(), null, statementContext.getSchedulingService(), statementContext.getVariableService(), evaluatorContextStmt, statementContext.getEventAdapterService(), statementContext.getStatementName(), statementContext.getStatementId(), statementContext.getAnnotations(), statementContext.getContextDescriptor());
            ExprNode validated = ExprNodeUtility.getValidatedSubtree(createDesc.getAssignment(), validationContext);
            value = validated.getExprEvaluator().evaluate(null, true, evaluatorContextStmt);
        }

        // Create variable
        try
        {
            services.getVariableService().createNewVariable(createDesc.getVariableName(), createDesc.getVariableType(), value, createDesc.isConstant(), statementContext.getExtensionServicesContext());
        }
        catch (VariableExistsException ex)
        {
            // for new statement we don't allow creating the same variable
            if (isNewStatement)
            {
                throw new ExprValidationException("Cannot create variable: " + ex.getMessage(), ex);
            }
        }
        catch (VariableDeclarationException ex)
        {
            throw new ExprValidationException("Cannot create variable: " + ex.getMessage(), ex);
        }

        final CreateVariableView createView = new CreateVariableView(statementContext.getStatementId(), services.getEventAdapterService(), services.getVariableService(), createDesc.getVariableName(), statementContext.getStatementResultService());
        final int variableNum = services.getVariableService().getReader(createDesc.getVariableName()).getVariableNumber();
        services.getVariableService().registerCallback(variableNum, createView);
        statementContext.getStatementStopService().addSubscriber(new StatementStopCallback() {
            public void statementStopped()
            {
                services.getVariableService().unregisterCallback(variableNum, createView);
            }
        });

        // Create result set processor, use wildcard selection
        statementSpec.getSelectClauseSpec().getSelectExprList().clear();
        statementSpec.getSelectClauseSpec().add(new SelectClauseElementWildcard());
        statementSpec.setSelectStreamDirEnum(SelectClauseStreamSelectorEnum.RSTREAM_ISTREAM_BOTH);
        StreamTypeService typeService = new StreamTypeServiceImpl(new EventType[] {createView.getEventType()}, new String[] {"create_variable"}, new boolean[] {true}, services.getEngineURI(), false);
        AgentInstanceContext agentInstanceContext = getDefaultAgentInstanceContext();
        ResultSetProcessorFactoryDesc resultSetProcessorPrototype = ResultSetProcessorFactoryFactory.getProcessorPrototype(
                statementSpec, statementContext, typeService, null, new boolean[0], true, ContextPropertyRegistryImpl.EMPTY_REGISTRY, null);
        ResultSetProcessor resultSetProcessor = EPStatementStartMethodHelperAssignExpr.getAssignResultSetProcessor(agentInstanceContext, resultSetProcessorPrototype);

        // Attach output view
        OutputProcessViewFactory outputViewFactory = OutputProcessViewFactoryFactory.make(statementSpec, services.getInternalEventRouter(), agentInstanceContext.getStatementContext(), resultSetProcessor.getResultEventType(), null);
        OutputProcessViewBase outputView = outputViewFactory.makeView(resultSetProcessor, agentInstanceContext);
        createView.addView(outputView);

        services.getStatementVariableRefService().addReferences(statementContext.getStatementName(), Collections.singleton(createDesc.getVariableName()));
        EPStatementDestroyMethod destroyMethod = new EPStatementDestroyMethod() {
            public void destroy() {
                try {
                    services.getStatementVariableRefService().removeReferencesStatement(statementContext.getStatementName());
                }
                catch (RuntimeException ex) {
                    log.error("Error removing variable '" + createDesc.getVariableName() + "': " + ex.getMessage());
                }
            }
        };

        EPStatementStopMethod stopMethod = new EPStatementStopMethod(){
View Full Code Here

Examples of com.espertech.esper.epl.spec.CreateVariableDesc

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    public EPStatementStartMethodCreateVariable(StatementSpecCompiled statementSpec) {
        super(statementSpec);
    }

    public EPStatementStartResult startInternal(final EPServicesContext services, final StatementContext statementContext, boolean isNewStatement, boolean isRecoveringStatement, boolean isRecoveringResilient) throws ExprValidationException, ViewProcessingException {
        final CreateVariableDesc createDesc = statementSpec.getCreateVariableDesc();

        // Get assignment value
        Object value = null;
        if (createDesc.getAssignment() != null)
        {
            // Evaluate assignment expression
            StreamTypeService typeService = new StreamTypeServiceImpl(new EventType[0], new String[0], new boolean[0], services.getEngineURI(), false);
            ExprEvaluatorContextStatement evaluatorContextStmt = new ExprEvaluatorContextStatement(statementContext);
            ExprValidationContext validationContext = new ExprValidationContext(typeService, statementContext.getMethodResolutionService(), null, statementContext.getSchedulingService(), statementContext.getVariableService(), evaluatorContextStmt, statementContext.getEventAdapterService(), statementContext.getStatementName(), statementContext.getStatementId(), statementContext.getAnnotations(), statementContext.getContextDescriptor());
            ExprNode validated = ExprNodeUtility.getValidatedSubtree(createDesc.getAssignment(), validationContext);
            value = validated.getExprEvaluator().evaluate(null, true, evaluatorContextStmt);
        }

        // Create variable
        try
        {
            services.getVariableService().createNewVariable(createDesc.getVariableName(), createDesc.getVariableType(), value, createDesc.isConstant(), createDesc.isArray(), statementContext.getExtensionServicesContext(), services.getEngineImportService());
        }
        catch (VariableExistsException ex)
        {
            // for new statement we don't allow creating the same variable
            if (isNewStatement)
            {
                throw new ExprValidationException("Cannot create variable: " + ex.getMessage(), ex);
            }
        }
        catch (VariableDeclarationException ex)
        {
            throw new ExprValidationException("Cannot create variable: " + ex.getMessage(), ex);
        }

        final CreateVariableView createView = new CreateVariableView(statementContext.getStatementId(), services.getEventAdapterService(), services.getVariableService(), createDesc.getVariableName(), statementContext.getStatementResultService());
        final int variableNum = services.getVariableService().getReader(createDesc.getVariableName()).getVariableNumber();
        services.getVariableService().registerCallback(variableNum, createView);
        statementContext.getStatementStopService().addSubscriber(new StatementStopCallback() {
            public void statementStopped()
            {
                services.getVariableService().unregisterCallback(variableNum, createView);
            }
        });

        // Create result set processor, use wildcard selection
        statementSpec.getSelectClauseSpec().setSelectExprList(new SelectClauseElementWildcard());
        statementSpec.setSelectStreamDirEnum(SelectClauseStreamSelectorEnum.RSTREAM_ISTREAM_BOTH);
        StreamTypeService typeService = new StreamTypeServiceImpl(new EventType[] {createView.getEventType()}, new String[] {"create_variable"}, new boolean[] {true}, services.getEngineURI(), false);
        AgentInstanceContext agentInstanceContext = getDefaultAgentInstanceContext(statementContext);
        ResultSetProcessorFactoryDesc resultSetProcessorPrototype = ResultSetProcessorFactoryFactory.getProcessorPrototype(
                statementSpec, statementContext, typeService, null, new boolean[0], true, ContextPropertyRegistryImpl.EMPTY_REGISTRY, null);
        ResultSetProcessor resultSetProcessor = EPStatementStartMethodHelperAssignExpr.getAssignResultSetProcessor(agentInstanceContext, resultSetProcessorPrototype);

        // Attach output view
        OutputProcessViewFactory outputViewFactory = OutputProcessViewFactoryFactory.make(statementSpec, services.getInternalEventRouter(), agentInstanceContext.getStatementContext(), resultSetProcessor.getResultEventType(), null);
        OutputProcessViewBase outputView = outputViewFactory.makeView(resultSetProcessor, agentInstanceContext);
        createView.addView(outputView);

        services.getStatementVariableRefService().addReferences(statementContext.getStatementName(), Collections.singleton(createDesc.getVariableName()));
        EPStatementDestroyMethod destroyMethod = new EPStatementDestroyMethod() {
            public void destroy() {
                try {
                    services.getStatementVariableRefService().removeReferencesStatement(statementContext.getStatementName());
                }
                catch (RuntimeException ex) {
                    log.error("Error removing variable '" + createDesc.getVariableName() + "': " + ex.getMessage());
                }
            }
        };

        EPStatementStopMethod stopMethod = new EPStatementStopMethod(){
View Full Code Here

Examples of com.espertech.esper.epl.spec.CreateVariableDesc

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    public EPStatementStartMethodCreateVariable(StatementSpecCompiled statementSpec) {
        super(statementSpec);
    }

    public EPStatementStartResult startInternal(final EPServicesContext services, final StatementContext statementContext, boolean isNewStatement, boolean isRecoveringStatement, boolean isRecoveringResilient) throws ExprValidationException, ViewProcessingException {
        final CreateVariableDesc createDesc = statementSpec.getCreateVariableDesc();

        // Get assignment value
        Object value = null;
        if (createDesc.getAssignment() != null)
        {
            // Evaluate assignment expression
            StreamTypeService typeService = new StreamTypeServiceImpl(new EventType[0], new String[0], new boolean[0], services.getEngineURI(), false);
            ExprEvaluatorContextStatement evaluatorContextStmt = new ExprEvaluatorContextStatement(statementContext);
            ExprValidationContext validationContext = new ExprValidationContext(typeService, statementContext.getMethodResolutionService(), null, statementContext.getSchedulingService(), statementContext.getVariableService(), evaluatorContextStmt, statementContext.getEventAdapterService(), statementContext.getStatementName(), statementContext.getStatementId(), statementContext.getAnnotations(), statementContext.getContextDescriptor());
            ExprNode validated = ExprNodeUtility.getValidatedSubtree(createDesc.getAssignment(), validationContext);
            value = validated.getExprEvaluator().evaluate(null, true, evaluatorContextStmt);
        }

        // Create variable
        try
        {
            services.getVariableService().createNewVariable(createDesc.getVariableName(), createDesc.getVariableType(), value, createDesc.isConstant(), createDesc.isArray(), statementContext.getExtensionServicesContext(), services.getEngineImportService());
        }
        catch (VariableExistsException ex)
        {
            // for new statement we don't allow creating the same variable
            if (isNewStatement)
            {
                throw new ExprValidationException("Cannot create variable: " + ex.getMessage(), ex);
            }
        }
        catch (VariableDeclarationException ex)
        {
            throw new ExprValidationException("Cannot create variable: " + ex.getMessage(), ex);
        }

        final CreateVariableView createView = new CreateVariableView(statementContext.getStatementId(), services.getEventAdapterService(), services.getVariableService(), createDesc.getVariableName(), statementContext.getStatementResultService());
        final int variableNum = services.getVariableService().getReader(createDesc.getVariableName()).getVariableNumber();
        services.getVariableService().registerCallback(variableNum, createView);
        statementContext.getStatementStopService().addSubscriber(new StatementStopCallback() {
            public void statementStopped()
            {
                services.getVariableService().unregisterCallback(variableNum, createView);
            }
        });

        // Create result set processor, use wildcard selection
        statementSpec.getSelectClauseSpec().getSelectExprList().clear();
        statementSpec.getSelectClauseSpec().add(new SelectClauseElementWildcard());
        statementSpec.setSelectStreamDirEnum(SelectClauseStreamSelectorEnum.RSTREAM_ISTREAM_BOTH);
        StreamTypeService typeService = new StreamTypeServiceImpl(new EventType[] {createView.getEventType()}, new String[] {"create_variable"}, new boolean[] {true}, services.getEngineURI(), false);
        AgentInstanceContext agentInstanceContext = getDefaultAgentInstanceContext(statementContext);
        ResultSetProcessorFactoryDesc resultSetProcessorPrototype = ResultSetProcessorFactoryFactory.getProcessorPrototype(
                statementSpec, statementContext, typeService, null, new boolean[0], true, ContextPropertyRegistryImpl.EMPTY_REGISTRY, null);
        ResultSetProcessor resultSetProcessor = EPStatementStartMethodHelperAssignExpr.getAssignResultSetProcessor(agentInstanceContext, resultSetProcessorPrototype);

        // Attach output view
        OutputProcessViewFactory outputViewFactory = OutputProcessViewFactoryFactory.make(statementSpec, services.getInternalEventRouter(), agentInstanceContext.getStatementContext(), resultSetProcessor.getResultEventType(), null);
        OutputProcessViewBase outputView = outputViewFactory.makeView(resultSetProcessor, agentInstanceContext);
        createView.addView(outputView);

        services.getStatementVariableRefService().addReferences(statementContext.getStatementName(), Collections.singleton(createDesc.getVariableName()));
        EPStatementDestroyMethod destroyMethod = new EPStatementDestroyMethod() {
            public void destroy() {
                try {
                    services.getStatementVariableRefService().removeReferencesStatement(statementContext.getStatementName());
                }
                catch (RuntimeException ex) {
                    log.error("Error removing variable '" + createDesc.getVariableName() + "': " + ex.getMessage());
                }
            }
        };

        EPStatementStopMethod stopMethod = new EPStatementStopMethod(){
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