Package com.espertech.esper.epl.variable

Examples of com.espertech.esper.epl.variable.VariableReader

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    {
      return new OutputConditionNullFactory();
    }

        // Check if a variable is present
        VariableReader reader = null;
        if (outputLimitSpec.getVariableName() != null)
        {
            reader = statementContext.getVariableService().getReader(outputLimitSpec.getVariableName());
            if (reader == null)
            {
                throw new IllegalArgumentException("Variable named '" + outputLimitSpec.getVariableName() + "' has not been declared");
            }
        }

        if(outputLimitSpec.getDisplayLimit() == OutputLimitLimitType.FIRST)
    {
            if (isGrouped) {
                return new OutputConditionNullFactory();
            }
            if (!isWithHavingClause) {
                return new OutputConditionFirstFactory(outputLimitSpec, statementContext, isGrouped, isWithHavingClause);
            }
    }

        if(outputLimitSpec.getRateType() == OutputLimitRateType.CRONTAB)
        {
            return new OutputConditionCrontabFactory(outputLimitSpec.getCrontabAtSchedule(), statementContext);
        }
        else if(outputLimitSpec.getRateType() == OutputLimitRateType.WHEN_EXPRESSION)
        {
            return new OutputConditionExpressionFactory(outputLimitSpec.getWhenExpressionNode(), outputLimitSpec.getThenExpressions(), statementContext, outputLimitSpec.getAndAfterTerminateExpr(), outputLimitSpec.getAndAfterTerminateThenExpressions());
        }
        else if(outputLimitSpec.getRateType() == OutputLimitRateType.EVENTS)
    {
            if (log.isDebugEnabled())
            {
          log.debug(".createCondition creating OutputConditionCount with event rate " + outputLimitSpec);
            }

            if ((reader != null) && (!JavaClassHelper.isNumericNonFP(reader.getType())))
            {
                throw new IllegalArgumentException("Variable named '" + outputLimitSpec.getVariableName() + "' must be type integer, long or short");
            }

            int rate = -1;
            if (outputLimitSpec.getRate() != null)
            {
                rate = outputLimitSpec.getRate().intValue();
            }
            return new OutputConditionCountFactory(rate, reader);
    }
    else if (outputLimitSpec.getRateType() == OutputLimitRateType.TERM)
    {
            if (outputLimitSpec.getAndAfterTerminateExpr() == null && (outputLimitSpec.getAndAfterTerminateThenExpressions() == null || outputLimitSpec.getAndAfterTerminateThenExpressions().isEmpty())) {
                return new OutputConditionTermFactory();
            }
            else {
                return new OutputConditionExpressionFactory(new ExprConstantNodeImpl(false), Collections.<OnTriggerSetAssignment>emptyList(), statementContext, outputLimitSpec.getAndAfterTerminateExpr(), outputLimitSpec.getAndAfterTerminateThenExpressions());
            }
    }
        else {
            if (log.isDebugEnabled())
            {
                log.debug(".createCondition creating OutputConditionTime with interval length " + outputLimitSpec.getRate());
            }
            if ((reader != null) && (!JavaClassHelper.isNumeric(reader.getType())))
            {
                throw new IllegalArgumentException("Variable named '" + outputLimitSpec.getVariableName() + "' must be of numeric type");
            }

            return new OutputConditionTimeFactory(outputLimitSpec.getTimePeriodExpr(), statementContext);
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        this.unmatchedListener = listener;
    }

    public void setVariableValue(String variableName, Object variableValue) throws EPException
    {
        VariableReader reader = services.getVariableService().getReader(variableName);
        if (reader == null) {
            throw new VariableNotFoundException("Variable by name '" + variableName + "' has not been declared");
        }
        if (reader.isConstant()) {
            throw new VariableConstantValueException("Variable by name '" + variableName + "' is declared as constant and may not be assigned a new value");
        }

        services.getVariableService().getReadWriteLock().writeLock().lock();
        try {
            services.getVariableService().checkAndWrite(reader.getVariableNumber(), variableValue);
            services.getVariableService().commit();
        }
        finally {
            services.getVariableService().getReadWriteLock().writeLock().unlock();
        }
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    {
        // verify
        for (Map.Entry<String, Object> entry : variableValues.entrySet())
        {
            String variableName = entry.getKey();
            VariableReader reader = services.getVariableService().getReader(variableName);
            if (reader == null) {
                throw new VariableNotFoundException("Variable by name '" + variableName + "' has not been declared");
            }
            if (reader.isConstant()) {
                throw new VariableConstantValueException("Variable by name '" + variableName + "' is declared as constant and may not be assigned a new value");
            }
        }

        // set values
        services.getVariableService().getReadWriteLock().writeLock().lock();
        try {
            for (Map.Entry<String, Object> entry : variableValues.entrySet())
            {
                String variableName = entry.getKey();
                VariableReader reader = services.getVariableService().getReader(variableName);
                try
                {
                    services.getVariableService().checkAndWrite(reader.getVariableNumber(), entry.getValue());
                }
                catch (RuntimeException ex)
                {
                    services.getVariableService().rollback();
                    throw ex;
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    }

    public Object getVariableValue(String variableName) throws EPException
    {
        services.getVariableService().setLocalVersion();
        VariableReader reader = services.getVariableService().getReader(variableName);
        if (reader == null) {
            throw new VariableNotFoundException("Variable by name '" + variableName + "' has not been declared");
        }
        Object value = reader.getValue();
        if (value == null || reader.getEventType() == null) {
            return value;
        }
        return ((EventBean) value).getUnderlying();
    }
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    {
        services.getVariableService().setLocalVersion();
        Map<String, Object> values = new HashMap<String, Object>();
        for (String variableName : variableNames)
        {
            VariableReader reader = services.getVariableService().getReader(variableName);
            if (reader == null)
            {
                throw new VariableNotFoundException("Variable by name '" + variableName + "' has not been declared");
            }

            Object value = reader.getValue();
            if (value != null && reader.getEventType() != null) {
                value = ((EventBean) value).getUnderlying();
            }
            values.put(variableName, value);
        }
        return values;
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        return values;
    }

    public Class getVariableType(String variableName)
    {
        VariableReader reader = services.getVariableService().getReader(variableName);
        if (reader == null)
        {
            return null;
        }
        return reader.getType();
    }
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        if (parent.getVariableNames() != null)
        {
            // if using variables, register a callback on the change of the variable
            for (String variableName : parent.getVariableNames())
            {
                final VariableReader reader = agentInstanceContext.getStatementContext().getVariableService().getReader(variableName);
                agentInstanceContext.getStatementContext().getVariableService().registerCallback(reader.getVariableNumber(), this);
                agentInstanceContext.addTerminationCallback(new StopCallback() {
                    public void stop() {
                        agentInstanceContext.getStatementContext().getVariableService().unregisterCallback(reader.getVariableNumber(), OutputConditionExpression.this);
                    }
                });
            }
        }
    }
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    }

    private AggSvcGroupByReclaimAgedEvalFunc getEvaluationFunction(final VariableService variableService, String hintValue)
            throws ExprValidationException
    {
        final VariableReader variableReader = variableService.getReader(hintValue);
        if (variableReader != null)
        {
            if (!JavaClassHelper.isNumeric(variableReader.getType()))
            {
                throw new ExprValidationException("Variable type of variable '" + variableReader.getVariableName() + "' is not numeric");
            }

            return new AggSvcGroupByReclaimAgedEvalFuncVariable(variableReader);
        }
        else
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            exprDotNodeFilterAnalyzerDesc = evals.getFilterAnalyzerDesc();
            return;
        }

        // If variable then resolve as such
        VariableReader variableReader = validationContext.getVariableService().getReader(firstItem.getName());
        if (variableReader != null) {
            ExpressionReturnType typeInfo;
            ExprDotStaticMethodWrap wrap;
            if (variableReader.getType().isArray()) {
                typeInfo = ExpressionReturnType.collectionOfSingleValue(variableReader.getType().getComponentType());
                wrap = new ExprDotStaticMethodWrapArrayScalar(variableReader.getVariableName(), variableReader.getType().getComponentType());
            }
            else if (variableReader.getEventType() != null) {
                typeInfo = ExpressionReturnType.singleEvent(variableReader.getEventType());
                wrap = null;
            }
            else {
                typeInfo = ExpressionReturnType.singleValue(variableReader.getType());
                wrap = null;
            }

            ExprDotNodeRealizedChain evals = ExprDotNodeUtility.getChainEvaluators(typeInfo, modifiedChain, validationContext, false, new ExprDotNodeFilterAnalyzerInputStatic());
            exprEvaluator = new ExprDotEvalVariable(variableReader, wrap, evals.getChainWithUnpack());
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    }

    private AggSvcGroupByReclaimAgedEvalFunc getEvaluationFunction(final VariableService variableService, String hintValue)
            throws ExprValidationException
    {
        final VariableReader variableReader = variableService.getReader(hintValue);
        if (variableReader != null)
        {
            if (!JavaClassHelper.isNumeric(variableReader.getType()))
            {
                throw new ExprValidationException("Variable type of variable '" + variableReader.getVariableName() + "' is not numeric");
            }

            return new AggSvcGroupByReclaimAgedEvalFuncVariable(variableReader);
        }
        else
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Related Classes of com.espertech.esper.epl.variable.VariableReader

  • com.espertech.esper.core.ConfigurationOperationsImpl
  • com.espertech.esper.core.EPRuntimeImpl
  • com.espertech.esper.core.service.ConfigurationOperationsImpl
  • com.espertech.esper.core.service.EPRuntimeImpl
  • com.espertech.esper.epl.agg.AggSvcGroupByReclaimAged
  • com.espertech.esper.epl.agg.AggSvcGroupByReclaimAgedFactory
  • com.espertech.esper.epl.agg.service.AggSvcGroupByReclaimAgedFactory
  • com.espertech.esper.epl.core.OrderByProcessorRowLimitFactory
  • com.espertech.esper.epl.expression.ExprDotNode
  • com.espertech.esper.epl.expression.ExprVariableNodeImpl
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