/**
* 根据输入的path地址获取含有所有dbrule和tableRule的Map. 只在初始化的时候调用一次.
*
* @param path 路径名系统内采用 getClass().getResourceAsStream(path);的方式获取对应的stream资源
* @return
*/
@SuppressWarnings("unchecked")
public synchronized void initLogicTabMarticMap(String path, Map<String, LogicTabMatrix> map) {
Document doc = getDocument(path);
Element ele = doc.getRootElement();
String dbType = trim(ele.attributeValue("dbType"));
Iterator dbTabItr = ele.elementIterator("table");
int i = 1;
while (dbTabItr.hasNext()) {
Element aVtab = (Element) dbTabItr.next();
LogicTabMatrix aVtabMatrix = new LogicTabMatrix();
// globalTableRule,如果有则储存起来
Element globeRule = aVtab.element("globalTableRule");
if (globeRule != null) {
TabRule globTabRule = this.getTabRule(globeRule);
aVtabMatrix.setGlobalTableRule(globTabRule);
}
String logicName =
validAndTrim(aVtab.attributeValue("logicName"), "无法找到第" + i + "个虚拟表的logicName");
// martrix里面的TableName是返还给前端用于表名替换的，因此要保持原样
aVtabMatrix.setTableName(logicName);
String needRowCopy = trim(aVtab.attributeValue("rowCopy"));
if (needRowCopy != null && !needRowCopy.equals("")) {
aVtabMatrix.setNeedRowCopy(Boolean.valueOf(needRowCopy));
}
String reverseOutput = trim(aVtab.attributeValue("reverseOutput"));
if (reverseOutput != null && !reverseOutput.equals("")) {
aVtabMatrix.setAllowReverseOutput(Boolean.valueOf(reverseOutput));
}
aVtabMatrix.setDBType(dbType);
String tabFactor = trim(aVtab.elementText("tableFactor"));
aVtabMatrix.setTableFactor(tabFactor);
Element dbRules = (Element) aVtab.element("dbRules");
Iterator rulesItr = dbRules.elementIterator("dbRule");
Map<String, DBRule> ruleMap = getRuleList(rulesItr, aVtabMatrix);
// 当一个Rule对象有expression的时候放在depositedRule和allRule
// 如果没有expressionString串，则只放在allRule待选
Map<String, DBRule> depositedRules = getDepositedRule(ruleMap);
aVtabMatrix.setAllRules(ruleMap);
aVtabMatrix.setDepositedRules(depositedRules);
List<DBRule> defaultRuleList = getDefaultRuleList(aVtab, aVtabMatrix);
aVtabMatrix.setDefaultRules(defaultRuleList);
map.put(logicName.toLowerCase(), aVtabMatrix);
i++;
}
}
/**
* 解析每一个rule
*
* @param rulesItr
* @return
*/
@SuppressWarnings("unchecked")
private Map<String, DBRule> getRuleList(Iterator rulesItr, LogicTabMatrix aVtabMatrix) {
Map<String, DBRule> rules = new HashMap<String, DBRule>();
while (rulesItr.hasNext()) {
Element ruleEle = (Element) rulesItr.next();
String id = validAndTrim(ruleEle.attributeValue("id"), "必须指定Rule的id");
DBRule rule = new DBRule();
String exp = trim(ruleEle.elementText("expression"));
rule.setExpression(exp);
String primaryKey = trim(ruleEle.elementText("primaryKey"));
rule.setPrimaryKey(primaryKey);
String primaryKeyExp = trim(ruleEle.elementText("primaryKeyExp"));
rule.setPrimaryKeyExp(primaryKeyExp);
String parameters = trim(ruleEle.elementText("parameters"));
rule.setParameters(parameters);
String readPoolStr = ruleEle.elementText("readPools");
String writePoolStr = ruleEle.elementText("writePools");
if (readPoolStr == null
|| writePoolStr == null
|| readPoolStr.trim().equals("")
|| writePoolStr.trim().equals("")) {
throw new TDLRunTimeException(
"readPool和writePool必须同时指名" + "readPool可以和writePool同名，但writePool不能为多个，也不能为虚拟池");
}
String[] readPools = readPoolStr.trim().split(",");
String[] writePools = writePoolStr.trim().split(",");
rule.setReadPool(readPools);
rule.setWritePool(writePools);
Element subTableRuleElement = ruleEle.element("tableRule");
if (subTableRuleElement != null) {
TabRule tabRule = getTabRule(subTableRuleElement);
tabRule.setPrimaryKey(primaryKey);
rule.setDBSubTabRule(tabRule);
log.debug("id:" + id + "的DBRule有subTableRule,因此使用subTableRule");
}
// add by shenxun 现在的逻辑是直接替换subRuleEle,以后不会再
// 使用globalRule这个项目了，它只在载入的时候临时起作用
else {
TabRule tabRule = aVtabMatrix.getGlobalTableRule();
if (tabRule != null) {
tabRule.setPrimaryKey(primaryKey);
}
rule.setDBSubTabRule(tabRule);
log.debug("id:" + id + "的DBRule没有subTableRule,因此使用globalTableRule");
}
rules.put(id, rule);
}
return rules;
}
/**
* 根据DefaultPool字段（允许用“,”分隔)，获取DBRule中含有指定写库的DBRule
*
* @param aVtab
* @param aVtabMatrix
* @param tempSet
* @return
*/
private List<DBRule> getDefaultRuleList(Element aVtab, LogicTabMatrix aVtabMatrix) {
List<DBRule> defaultList = new ArrayList<DBRule>();
String defaultPools = trim(aVtab.attributeValue("defaultWritePool"));
if (defaultPools != null) {
String[] defaultPoolsStrArray = defaultPools.split(",");
Map<String, DBRule> map = aVtabMatrix.getAllRules();
for (String str : defaultPoolsStrArray) {
DBRule dbrule = map.get(str.trim());
if (dbrule != null) {
defaultList.add(dbrule);
} else {
throw new IllegalArgumentException(
"defaultRule中id为:" + str + " 的字段不能找到" + "一个对应的规则，请确认该id对应一个dbRule的id参数");
}
}
}
return defaultList;
}