/** * Iterate returning all values. * * @return map of values */ public Map<String, Object> iterate(int agentInstanceId) { Map<String, Object> values = new HashMap<String, Object>(); int count = 0; for (VariableTriggerSetDesc assignment : assignments) { Object value; if (readersForGlobalVars[count] == null) { VariableReader reader = variableService.getReader(assignment.variableName, agentInstanceId); if (reader == null) { continue; } value = reader.getValue(); } else { value = readersForGlobalVars[count].getValue(); } if (value == null) { values.put(assignment.variableName, null); } else if (writers[count] != null) { EventBean current = (EventBean) value; values.put(assignment.variableName, writers[count].getGetter().get(current)); } else if (value instanceof EventBean) { values.put(assignment.variableName, ((EventBean) value).getUnderlying()); } else { values.put(assignment.variableName, value); } count++; } return values; }
// // Methods // private void read() { add(valueReader.read()); }
/** * Write new variable values and commit, evaluating assignment expressions using the given events * per stream. * * <p>Populates an optional map of new values if a non-null map is passed. * * @param variableService variable service * @param eventsPerStream events per stream * @param valuesWritten null or an empty map to populate with written values * @param exprEvaluatorContext expression evaluation context */ public void writeVariables( VariableService variableService, EventBean[] eventsPerStream, Map<String, Object> valuesWritten, ExprEvaluatorContext exprEvaluatorContext) { Set<String> variablesBeansCopied = null; if (!copyMethods.isEmpty()) { variablesBeansCopied = new HashSet<String>(); } // We obtain a write lock global to the variable space // Since expressions can contain variables themselves, these need to be unchangeable for the // duration // as there could be multiple statements that do "var1 = var1 + 1". variableService.getReadWriteLock().writeLock().lock(); try { variableService.setLocalVersion(); int count = 0; for (VariableTriggerSetDesc assignment : assignments) { VariableMetaData variableMetaData = metaData[count]; int agentInstanceId = variableMetaData.getContextPartitionName() == null ? VariableService.NOCONTEXT_AGENTINSTANCEID : exprEvaluatorContext.getAgentInstanceId(); Object value = assignment.evaluator.evaluate(eventsPerStream, true, exprEvaluatorContext); if (writers[count] != null) { VariableReader reader = variableService.getReader( variableMetaData.getVariableName(), exprEvaluatorContext.getAgentInstanceId()); EventBean current = (EventBean) reader.getValue(); if (current == null) { value = null; } else { WriteDesc writeDesc = writers[count]; boolean copy = variablesBeansCopied.add(writeDesc.getVariableName()); if (copy) { EventBean copied = copyMethods.get(writeDesc.getType()).copy(current); current = copied; } variableService.write(variableMetaData.getVariableNumber(), agentInstanceId, current); writeDesc.getWriter().write(value, current); } } else if (variableMetaData.getEventType() != null) { EventBean eventBean = eventAdapterService.adapterForType(value, variableMetaData.getEventType()); variableService.write(variableMetaData.getVariableNumber(), agentInstanceId, eventBean); } else { if ((value != null) && (mustCoerce[count])) { value = JavaClassHelper.coerceBoxed((Number) value, variableMetaData.getType()); } variableService.write(variableMetaData.getVariableNumber(), agentInstanceId, value); } count++; if (valuesWritten != null) { valuesWritten.put(assignment.variableName, value); } } variableService.commit(); } catch (RuntimeException ex) { log.error("Error evaluating on-set variable expressions: " + ex.getMessage(), ex); variableService.rollback(); } finally { variableService.getReadWriteLock().writeLock().unlock(); } }