private void setInputStreams(StreamingConfig config) throws ExecutorException {
String orderedStreams = combineOperator.getOrderedStreams();
List<String> inputStreamNames = Lists.newArrayList();
String[] strs = orderedStreams.split(",");
for (int i = 0; i < strs.length; i++) {
inputStreamNames.add(getPlanStreamNameFromTransition(strs[i]));
}
config.put(StreamingConfig.OPERATOR_COMBINE_INPUTNAMES, inputStreamNames);
}
private void setCombineConditions(StreamingConfig config) throws ExecutorException {
Map<String, String> keyMap = Maps.newHashMap();
List<ExpressionDescribe> exps =
createCombineExpressions(combineOperator.getCombineProperties());
for (ExpressionDescribe exp : exps) {
PropertyValueExpressionDesc pexp = (PropertyValueExpressionDesc) exp;
String streamName = pexp.getSchemaId();
keyMap.put(getPlanStreamNameFromTransition(streamName), pexp.getProperty());
}
config.put(StreamingConfig.OPERATOR_COMBINE_INPUTNAMES_AND_KEY, keyMap);
}
private void setCombineOutputs(StreamingConfig config) throws ExecutorException {
List<ExpressionDescribe> exps = createCombineExpressions(combineOperator.getOutputExpression());
/*
* 需要检查相同的流属性必须放在一起
*/
List<String> combineStreams = Lists.newArrayList();
List<List<PropertyValueExpression>> tmpOuts = Lists.newArrayList();
for (int i = 0; i < exps.size(); i++) {
if (!(exps.get(i) instanceof PropertyValueExpressionDesc)) {
ExecutorException exception =
new ExecutorException(ErrorCode.SEMANTICANALYZE_COMBINE_SIMPLE_EXPRESSION);
LOG.error("Not property value expression in combie clause.", exception);
throw exception;
}
PropertyValueExpressionDesc pexp = (PropertyValueExpressionDesc) exps.get(i);
String streamName = pexp.getSchemaId();
PropertyValueExpression expression =
(PropertyValueExpression) new PropertyValueExpressionCreator().createInstance(pexp, null);
if (combineStreams.size() == 0) {
combineStreams.add(streamName);
tmpOuts.add(new ArrayList<PropertyValueExpression>());
tmpOuts.get(tmpOuts.size() - 1).add(expression);
} else {
if (combineStreams.get(combineStreams.size() - 1).equals(streamName)) {
tmpOuts.get(tmpOuts.size() - 1).add(expression);
} else {
/*
* 如果出现不一样的流名称，先检查该流名称是否已经出现过
* 如果出现过，就报错，因为combine中的列必须是按照顺序进行的。
*/
checkStreamNameRepeated(combineStreams, streamName);
combineStreams.add(streamName);
tmpOuts.add(new ArrayList<PropertyValueExpression>());
tmpOuts.get(tmpOuts.size() - 1).add(expression);
}
}
}
// 查询顺序取决于这个参数
config.put(
StreamingConfig.OPERATOR_COMBINE_INPUTNAMES_AND_EXPRESSION,
createOutputMaps(combineStreams, tmpOuts));
}
