/**
* @param schema
* @param ctx
* @param tc
* @return true表示校验通过，false表示检验不通过
*/
public static boolean checkRuleRequired(
SchemaConfig schema,
DruidShardingParseInfo ctx,
RouteCalculateUnit routeUnit,
TableConfig tc) {
if (!tc.isRuleRequired()) {
return true;
}
boolean hasRequiredValue = false;
String tableName = tc.getName();
if (routeUnit.getTablesAndConditions().get(tableName) == null
|| routeUnit.getTablesAndConditions().get(tableName).size() == 0) {
hasRequiredValue = false;
} else {
for (Map.Entry<String, Set<ColumnRoutePair>> condition :
routeUnit.getTablesAndConditions().get(tableName).entrySet()) {
String colName = condition.getKey();
// 条件字段是拆分字段
if (colName.equals(tc.getPartitionColumn())) {
hasRequiredValue = true;
break;
}
}
}
return hasRequiredValue;
}
/**
* 根据 ER分片规则获取路由集合
*
* @param stmt 执行的语句
* @param rrs 数据路由集合
* @param tc 表实体
* @param joinKeyVal 连接属性
* @return RouteResultset(数据路由集合)
* @throws SQLNonTransientException
* @author mycat
*/
public static RouteResultset routeByERParentKey(
String stmt, RouteResultset rrs, TableConfig tc, String joinKeyVal)
throws SQLNonTransientException {
// only has one parent level and ER parent key is parent
// table's partition key
if (tc.isSecondLevel()
&& tc.getParentTC().getPartitionColumn().equals(tc.getParentKey())) { // using
// parent
// rule to
// find
// datanode
Set<ColumnRoutePair> parentColVal = new HashSet<ColumnRoutePair>(1);
ColumnRoutePair pair = new ColumnRoutePair(joinKeyVal);
parentColVal.add(pair);
Set<String> dataNodeSet = ruleCalculate(tc.getParentTC(), parentColVal);
if (dataNodeSet.isEmpty() || dataNodeSet.size() > 1) {
throw new SQLNonTransientException(
"parent key can't find valid datanode ,expect 1 but found: " + dataNodeSet.size());
}
String dn = dataNodeSet.iterator().next();
if (LOGGER.isDebugEnabled()) {
LOGGER.debug(
"found partion node (using parent partion rule directly) for child table to insert "
+ dn
+ " sql :"
+ stmt);
}
return RouterUtil.routeToSingleNode(rrs, dn, stmt);
}
return null;
}
/**
* 根据标名随机获取一个节点
*
* @param schema 数据库名
* @param table 表名
* @return 数据节点
* @author mycat
*/
private static String getMetaReadDataNode(SchemaConfig schema, String table) {
// Table名字被转化为大写的，存储在schema
table = table.toUpperCase();
String dataNode = null;
Map<String, TableConfig> tables = schema.getTables();
TableConfig tc;
if (tables != null && (tc = tables.get(table)) != null) {
dataNode = tc.getRandomDataNode();
}
return dataNode;
}
public static boolean processInsert(
SchemaConfig schema, int sqlType, String origSQL, ServerConnection sc)
throws SQLNonTransientException {
String tableName = StringUtil.getTableName(origSQL).toUpperCase();
TableConfig tableConfig = schema.getTables().get(tableName);
boolean processedInsert = false;
if (null != tableConfig && tableConfig.isAutoIncrement()) {
String primaryKey = tableConfig.getPrimaryKey();
processedInsert = processInsert(sc, schema, sqlType, origSQL, tableName, primaryKey);
}
return processedInsert;
}
private void processChildTables(
Map<String, TableConfig> tables,
TableConfig parentTable,
String dataNodes,
Element tableNode) {
// parse child tables
NodeList childNodeList = tableNode.getChildNodes();
for (int j = 0; j < childNodeList.getLength(); j++) {
Node theNode = childNodeList.item(j);
if (!theNode.getNodeName().equals("childTable")) {
continue;
}
Element childTbElement = (Element) theNode;
String cdTbName = childTbElement.getAttribute("name").toUpperCase();
String primaryKey =
childTbElement.hasAttribute("primaryKey")
? childTbElement.getAttribute("primaryKey").toUpperCase()
: null;
boolean autoIncrement = false;
if (childTbElement.hasAttribute("autoIncrement")) {
autoIncrement = Boolean.parseBoolean(childTbElement.getAttribute("autoIncrement"));
}
boolean needAddLimit = true;
if (childTbElement.hasAttribute("needAddLimit")) {
needAddLimit = Boolean.parseBoolean(childTbElement.getAttribute("needAddLimit"));
}
String joinKey = childTbElement.getAttribute("joinKey").toUpperCase();
String parentKey = childTbElement.getAttribute("parentKey").toUpperCase();
TableConfig table =
new TableConfig(
cdTbName,
primaryKey,
autoIncrement,
needAddLimit,
TableConfig.TYPE_GLOBAL_DEFAULT,
dataNodes,
getDbType(dataNodes),
null,
false,
parentTable,
true,
joinKey,
parentKey);
if (tables.containsKey(table.getName())) {
throw new ConfigException("table " + table.getName() + " duplicated!");
}
tables.put(table.getName(), table);
processChildTables(tables, table, dataNodes, childTbElement);
}
}
private boolean isHasMultiDbType(TableConfig table) {
Set<String> dbTypes = table.getDbTypes();
for (String dbType : dbTypes) {
if (!"mysql".equalsIgnoreCase(dbType)) {
return true;
}
}
return false;
}
/** @return dataNodeIndex -> [partitionKeysValueTuple+] */
public static Set<String> ruleCalculate(TableConfig tc, Set<ColumnRoutePair> colRoutePairSet) {
Set<String> routeNodeSet = new LinkedHashSet<String>();
String col = tc.getRule().getColumn();
RuleConfig rule = tc.getRule();
AbstractPartitionAlgorithm algorithm = rule.getRuleAlgorithm();
for (ColumnRoutePair colPair : colRoutePairSet) {
if (colPair.colValue != null) {
Integer nodeIndx = algorithm.calculate(colPair.colValue);
if (nodeIndx == null) {
throw new IllegalArgumentException(
"can't find datanode for sharding column:" + col + " val:" + colPair.colValue);
} else {
String dataNode = tc.getDataNodes().get(nodeIndx);
routeNodeSet.add(dataNode);
colPair.setNodeId(nodeIndx);
}
} else if (colPair.rangeValue != null) {
Integer[] nodeRange =
algorithm.calculateRange(
String.valueOf(colPair.rangeValue.beginValue),
String.valueOf(colPair.rangeValue.endValue));
if (nodeRange != null) {
/** 不能确认 colPair的 nodeid是否会有其它影响 */
if (nodeRange.length == 0) {
routeNodeSet.addAll(tc.getDataNodes());
} else {
ArrayList<String> dataNodes = tc.getDataNodes();
String dataNode = null;
for (Integer nodeId : nodeRange) {
dataNode = dataNodes.get(nodeId);
routeNodeSet.add(dataNode);
}
}
}
}
}
return routeNodeSet;
}
public static boolean processERChildTable(
final SchemaConfig schema, final String origSQL, final ServerConnection sc)
throws SQLNonTransientException {
String tableName = StringUtil.getTableName(origSQL).toUpperCase();
final TableConfig tc = schema.getTables().get(tableName);
if (null != tc && tc.isChildTable()) {
final RouteResultset rrs = new RouteResultset(origSQL, ServerParse.INSERT);
String joinKey = tc.getJoinKey();
MySqlInsertStatement insertStmt =
(MySqlInsertStatement) (new MySqlStatementParser(origSQL)).parseInsert();
int joinKeyIndex = getJoinKeyIndex(insertStmt.getColumns(), joinKey);
if (joinKeyIndex == -1) {
String inf = "joinKey not provided :" + tc.getJoinKey() + "," + insertStmt;
LOGGER.warn(inf);
throw new SQLNonTransientException(inf);
}
if (isMultiInsert(insertStmt)) {
String msg = "ChildTable multi insert not provided";
LOGGER.warn(msg);
throw new SQLNonTransientException(msg);
}
String joinKeyVal = insertStmt.getValues().getValues().get(joinKeyIndex).toString();
String sql = insertStmt.toString();
// try to route by ER parent partion key
RouteResultset theRrs = RouterUtil.routeByERParentKey(sql, rrs, tc, joinKeyVal);
if (theRrs != null) {
rrs.setFinishedRoute(true);
sc.getSession2().execute(rrs, ServerParse.INSERT);
return true;
}
// route by sql query root parent's datanode
final String findRootTBSql = tc.getLocateRTableKeySql().toLowerCase() + joinKeyVal;
if (LOGGER.isDebugEnabled()) {
LOGGER.debug("find root parent's node sql " + findRootTBSql);
}
ListenableFuture<String> listenableFuture =
MycatServer.getInstance()
.getListeningExecutorService()
.submit(
new Callable<String>() {
@Override
public String call() throws Exception {
FetchStoreNodeOfChildTableHandler fetchHandler =
new FetchStoreNodeOfChildTableHandler();
return fetchHandler.execute(
schema.getName(), findRootTBSql, tc.getRootParent().getDataNodes());
}
});
Futures.addCallback(
listenableFuture,
new FutureCallback<String>() {
@Override
public void onSuccess(String result) {
if (Strings.isNullOrEmpty(result)) {
StringBuilder s = new StringBuilder();
LOGGER.warn(
s.append(sc.getSession2()).append(origSQL).toString()
+ " err:"
+ "can't find (root) parent sharding node for sql:"
+ origSQL);
sc.writeErrMessage(
ErrorCode.ER_PARSE_ERROR,
"can't find (root) parent sharding node for sql:" + origSQL);
return;
}
if (LOGGER.isDebugEnabled()) {
LOGGER.debug(
"found partion node for child table to insert " + result + " sql :" + origSQL);
}
RouteResultset executeRrs = RouterUtil.routeToSingleNode(rrs, result, origSQL);
sc.getSession2().execute(executeRrs, ServerParse.INSERT);
}
@Override
public void onFailure(Throwable t) {
StringBuilder s = new StringBuilder();
LOGGER.warn(
s.append(sc.getSession2()).append(origSQL).toString() + " err:" + t.getMessage());
sc.writeErrMessage(ErrorCode.ER_PARSE_ERROR, t.getMessage() + " " + s.toString());
}
},
MycatServer.getInstance().getListeningExecutorService());
return true;
}
return false;
}
/**
* 处理分库表路由
*
* @param schema
* @param tablesAndConditions
* @param tablesRouteMap
* @throws SQLNonTransientException
*/
public static void findRouteWithcConditionsForTables(
SchemaConfig schema,
RouteResultset rrs,
Map<String, Map<String, Set<ColumnRoutePair>>> tablesAndConditions,
Map<String, Set<String>> tablesRouteMap,
String sql,
LayerCachePool cachePool,
boolean isSelect)
throws SQLNonTransientException {
// 为分库表找路由
for (Map.Entry<String, Map<String, Set<ColumnRoutePair>>> entry :
tablesAndConditions.entrySet()) {
String tableName = entry.getKey().toUpperCase();
TableConfig tableConfig = schema.getTables().get(tableName);
if (tableConfig == null) {
String msg =
"can't find table define in schema " + tableName + " schema:" + schema.getName();
LOGGER.warn(msg);
throw new SQLNonTransientException(msg);
}
// 全局表或者不分库的表略过（全局表后面再计算）
if (tableConfig.isGlobalTable()
|| schema.getTables().get(tableName).getDataNodes().size() == 1) {
continue;
} else { // 非全局表：分库表、childTable、其他
Map<String, Set<ColumnRoutePair>> columnsMap = entry.getValue();
String joinKey = tableConfig.getJoinKey();
String partionCol = tableConfig.getPartitionColumn();
String primaryKey = tableConfig.getPrimaryKey();
boolean isFoundPartitionValue =
partionCol != null && entry.getValue().get(partionCol) != null;
boolean isLoadData = false;
if (LOGGER.isDebugEnabled()) {
if (sql.startsWith(LoadData.loadDataHint)
|| rrs.isLoadData()) { // 由于load data一次会计算很多路由数据，如果输出此日志会极大降低load data的性能
isLoadData = true;
}
}
if (entry.getValue().get(primaryKey) != null
&& entry.getValue().size() == 1
&& !isLoadData) { // 主键查找
// try by primary key if found in cache
Set<ColumnRoutePair> primaryKeyPairs = entry.getValue().get(primaryKey);
if (primaryKeyPairs != null) {
if (LOGGER.isDebugEnabled()) {
LOGGER.debug("try to find cache by primary key ");
}
String tableKey = schema.getName() + '_' + tableName;
boolean allFound = true;
for (ColumnRoutePair pair : primaryKeyPairs) { // 可能id in(1,2,3)多主键
String cacheKey = pair.colValue;
String dataNode = (String) cachePool.get(tableKey, cacheKey);
if (dataNode == null) {
allFound = false;
continue;
} else {
if (tablesRouteMap.get(tableName) == null) {
tablesRouteMap.put(tableName, new HashSet<String>());
}
tablesRouteMap.get(tableName).add(dataNode);
continue;
}
}
if (!allFound) {
// need cache primary key ->datanode relation
if (isSelect && tableConfig.getPrimaryKey() != null) {
rrs.setPrimaryKey(tableKey + '.' + tableConfig.getPrimaryKey());
}
} else { // 主键缓存中找到了就执行循环的下一轮
continue;
}
}
}
if (isFoundPartitionValue) { // 分库表
Set<ColumnRoutePair> partitionValue = columnsMap.get(partionCol);
if (partitionValue == null || partitionValue.size() == 0) {
if (tablesRouteMap.get(tableName) == null) {
tablesRouteMap.put(tableName, new HashSet<String>());
}
tablesRouteMap.get(tableName).addAll(tableConfig.getDataNodes());
} else {
for (ColumnRoutePair pair : partitionValue) {
if (pair.colValue != null) {
Integer nodeIndex =
tableConfig.getRule().getRuleAlgorithm().calculate(pair.colValue);
if (nodeIndex == null) {
String msg =
"can't find any valid datanode :"
+ tableConfig.getName()
+ " -> "
+ tableConfig.getPartitionColumn()
+ " -> "
+ pair.colValue;
LOGGER.warn(msg);
throw new SQLNonTransientException(msg);
}
String node = tableConfig.getDataNodes().get(nodeIndex);
if (node != null) {
if (tablesRouteMap.get(tableName) == null) {
tablesRouteMap.put(tableName, new HashSet<String>());
}
tablesRouteMap.get(tableName).add(node);
}
}
if (pair.rangeValue != null) {
Integer[] nodeIndexs =
tableConfig
.getRule()
.getRuleAlgorithm()
.calculateRange(
pair.rangeValue.beginValue.toString(),
pair.rangeValue.endValue.toString());
for (Integer idx : nodeIndexs) {
String node = tableConfig.getDataNodes().get(idx);
if (node != null) {
if (tablesRouteMap.get(tableName) == null) {
tablesRouteMap.put(tableName, new HashSet<String>());
}
tablesRouteMap.get(tableName).add(node);
}
}
}
}
}
} else if (joinKey != null
&& columnsMap.get(joinKey) != null
&& columnsMap.get(joinKey).size()
!= 0) { // childTable (如果是select 语句的父子表join)之前要找到root table,将childTable移除,只留下root
// table
Set<ColumnRoutePair> joinKeyValue = columnsMap.get(joinKey);
ColumnRoutePair joinCol = null;
Set<String> dataNodeSet = ruleByJoinValueCalculate(rrs, tableConfig, joinKeyValue);
if (dataNodeSet.isEmpty()) {
throw new SQLNonTransientException("parent key can't find any valid datanode ");
}
if (LOGGER.isDebugEnabled()) {
LOGGER.debug(
"found partion nodes (using parent partion rule directly) for child table to update "
+ Arrays.toString(dataNodeSet.toArray())
+ " sql :"
+ sql);
}
if (dataNodeSet.size() > 1) {
routeToMultiNode(rrs.isCacheAble(), rrs, dataNodeSet, sql);
rrs.setFinishedRoute(true);
return;
} else {
rrs.setCacheAble(true);
routeToSingleNode(rrs, dataNodeSet.iterator().next(), sql);
return;
}
} else {
// 没找到拆分字段，该表的所有节点都路由
if (tablesRouteMap.get(tableName) == null) {
tablesRouteMap.put(tableName, new HashSet<String>());
}
tablesRouteMap.get(tableName).addAll(tableConfig.getDataNodes());
}
}
}
}
/**
* 单表路由
*
* @param schema
* @param ctx
* @param tableName
* @param rrs
* @param isSelect
* @return
* @throws SQLNonTransientException
*/
public static RouteResultset tryRouteForOneTable(
SchemaConfig schema,
DruidShardingParseInfo ctx,
RouteCalculateUnit routeUnit,
String tableName,
RouteResultset rrs,
boolean isSelect,
LayerCachePool cachePool)
throws SQLNonTransientException {
if (isNoSharding(schema, tableName)) {
return routeToSingleNode(rrs, schema.getDataNode(), ctx.getSql());
}
TableConfig tc = schema.getTables().get(tableName);
if (tc == null) {
String msg = "can't find table define in schema " + tableName + " schema:" + schema.getName();
LOGGER.warn(msg);
throw new SQLNonTransientException(msg);
}
if (tc.isGlobalTable()) { // 全局表
if (isSelect) {
// global select ,not cache route result
rrs.setCacheAble(false);
return routeToSingleNode(rrs, tc.getRandomDataNode(), ctx.getSql());
} else { // insert into 全局表的记录
return routeToMultiNode(false, rrs, tc.getDataNodes(), ctx.getSql(), true);
}
} else { // 单表或者分库表
if (!checkRuleRequired(schema, ctx, routeUnit, tc)) {
throw new IllegalArgumentException(
"route rule for table " + tc.getName() + " is required: " + ctx.getSql());
}
if (tc.getPartitionColumn() == null && !tc.isSecondLevel()) { // 单表且不是childTable
// return RouterUtil.routeToSingleNode(rrs, tc.getDataNodes().get(0),ctx.getSql());
return routeToMultiNode(rrs.isCacheAble(), rrs, tc.getDataNodes(), ctx.getSql());
} else {
// 每个表对应的路由映射
Map<String, Set<String>> tablesRouteMap = new HashMap<String, Set<String>>();
if (routeUnit.getTablesAndConditions() != null
&& routeUnit.getTablesAndConditions().size() > 0) {
RouterUtil.findRouteWithcConditionsForTables(
schema,
rrs,
routeUnit.getTablesAndConditions(),
tablesRouteMap,
ctx.getSql(),
cachePool,
isSelect);
if (rrs.isFinishedRoute()) {
return rrs;
}
}
if (tablesRouteMap.get(tableName) == null) {
return routeToMultiNode(rrs.isCacheAble(), rrs, tc.getDataNodes(), ctx.getSql());
} else {
// boolean isCache = rrs.isCacheAble();
// if(tablesRouteMap.get(tableName).size() > 1) {
//
// }
return routeToMultiNode(
rrs.isCacheAble(), rrs, tablesRouteMap.get(tableName), ctx.getSql());
}
}
}
}
/**
* 多表路由
*
* @param schema
* @param ctx
* @param tables
* @param rrs
* @param isSelect
* @return
* @throws SQLNonTransientException
*/
public static RouteResultset tryRouteForTables(
SchemaConfig schema,
DruidShardingParseInfo ctx,
RouteCalculateUnit routeUnit,
RouteResultset rrs,
boolean isSelect,
LayerCachePool cachePool)
throws SQLNonTransientException {
List<String> tables = ctx.getTables();
if (schema.isNoSharding() || (tables.size() >= 1 && isNoSharding(schema, tables.get(0)))) {
return routeToSingleNode(rrs, schema.getDataNode(), ctx.getSql());
}
// 只有一个表的
if (tables.size() == 1) {
return RouterUtil.tryRouteForOneTable(
schema, ctx, routeUnit, tables.get(0), rrs, isSelect, cachePool);
}
Set<String> retNodesSet = new HashSet<String>();
// 每个表对应的路由映射
Map<String, Set<String>> tablesRouteMap = new HashMap<String, Set<String>>();
// 分库解析信息不为空
Map<String, Map<String, Set<ColumnRoutePair>>> tablesAndConditions =
routeUnit.getTablesAndConditions();
if (tablesAndConditions != null && tablesAndConditions.size() > 0) {
// 为分库表找路由
RouterUtil.findRouteWithcConditionsForTables(
schema, rrs, tablesAndConditions, tablesRouteMap, ctx.getSql(), cachePool, isSelect);
if (rrs.isFinishedRoute()) {
return rrs;
}
}
// 为全局表和单库表找路由
for (String tableName : tables) {
TableConfig tableConfig = schema.getTables().get(tableName.toUpperCase());
if (tableConfig == null) {
String msg =
"can't find table define in schema " + tableName + " schema:" + schema.getName();
LOGGER.warn(msg);
throw new SQLNonTransientException(msg);
}
if (tableConfig.isGlobalTable()) { // 全局表
if (tablesRouteMap.get(tableName) == null) {
tablesRouteMap.put(tableName, new HashSet<String>());
}
tablesRouteMap.get(tableName).addAll(tableConfig.getDataNodes());
} else if (tablesRouteMap.get(tableName) == null) { // 余下的表都是单库表
tablesRouteMap.put(tableName, new HashSet<String>());
tablesRouteMap.get(tableName).addAll(tableConfig.getDataNodes());
}
}
boolean isFirstAdd = true;
for (Map.Entry<String, Set<String>> entry : tablesRouteMap.entrySet()) {
if (entry.getValue() == null || entry.getValue().size() == 0) {
throw new SQLNonTransientException("parent key can't find any valid datanode ");
} else {
if (isFirstAdd) {
retNodesSet.addAll(entry.getValue());
isFirstAdd = false;
} else {
retNodesSet.retainAll(entry.getValue());
if (retNodesSet.size() == 0) { // 两个表的路由无交集
String errMsg =
"invalid route in sql, multi tables found but datanode has no intersection "
+ " sql:"
+ ctx.getSql();
LOGGER.warn(errMsg);
throw new SQLNonTransientException(errMsg);
}
}
}
}
if (retNodesSet != null && retNodesSet.size() > 0) {
if (retNodesSet.size() > 1 && isAllGlobalTable(ctx, schema)) {
// mulit routes ,not cache route result
if (isSelect) {
rrs.setCacheAble(false);
routeToSingleNode(rrs, retNodesSet.iterator().next(), ctx.getSql());
} else { // delete 删除全局表的记录
routeToMultiNode(isSelect, rrs, retNodesSet, ctx.getSql(), true);
}
} else {
routeToMultiNode(isSelect, rrs, retNodesSet, ctx.getSql());
}
}
return rrs;
}
/** @return dataNodeIndex -> [partitionKeysValueTuple+] */
public static Set<String> ruleByJoinValueCalculate(
RouteResultset rrs, TableConfig tc, Set<ColumnRoutePair> colRoutePairSet)
throws SQLNonTransientException {
String joinValue = "";
if (colRoutePairSet.size() > 1) {
LOGGER.warn("joinKey can't have multi Value");
} else {
Iterator it = colRoutePairSet.iterator();
ColumnRoutePair joinCol = (ColumnRoutePair) it.next();
joinValue = joinCol.colValue;
}
Set<String> retNodeSet = new LinkedHashSet<String>();
Set<String> nodeSet = new LinkedHashSet<String>();
if (tc.isSecondLevel()
&& tc.getParentTC().getPartitionColumn().equals(tc.getParentKey())) { // using
// parent
// rule to
// find
// datanode
nodeSet = ruleCalculate(tc.getParentTC(), colRoutePairSet);
if (nodeSet.isEmpty()) {
throw new SQLNonTransientException(
"parent key can't find valid datanode ,expect 1 but found: " + nodeSet.size());
}
if (LOGGER.isDebugEnabled()) {
LOGGER.debug(
"found partion node (using parent partion rule directly) for child table to insert "
+ nodeSet
+ " sql :"
+ rrs.getStatement());
}
retNodeSet.addAll(nodeSet);
// for(ColumnRoutePair pair : colRoutePairSet) {
// nodeSet = ruleCalculate(tc.getParentTC(),colRoutePairSet);
// if (nodeSet.isEmpty() || nodeSet.size() > 1) {//an exception would be thrown, if sql was
// executed on more than on sharding
// throw new SQLNonTransientException(
// "parent key can't find valid datanode ,expect 1 but found: "
// + nodeSet.size());
// }
// String dn = nodeSet.iterator().next();
// if (LOGGER.isDebugEnabled()) {
// LOGGER.debug("found partion node (using parent partion rule directly) for child table
// to insert "
// + dn + " sql :" + rrs.getStatement());
// }
// retNodeSet.addAll(nodeSet);
// }
return retNodeSet;
} else {
retNodeSet.addAll(tc.getParentTC().getDataNodes());
}
return retNodeSet;
}
private Map<String, TableConfig> loadTables(Element node) {
// Map<String, TableConfig> tables = new HashMap<String, TableConfig>();
// 支持表名中包含引号[`] BEN GONG
Map<String, TableConfig> tables = new TableConfigMap();
NodeList nodeList = node.getElementsByTagName("table");
for (int i = 0; i < nodeList.getLength(); i++) {
Element tableElement = (Element) nodeList.item(i);
String tableNameElement = tableElement.getAttribute("name").toUpperCase();
String[] tableNames = tableNameElement.split(",");
String primaryKey =
tableElement.hasAttribute("primaryKey")
? tableElement.getAttribute("primaryKey").toUpperCase()
: null;
boolean autoIncrement = false;
if (tableElement.hasAttribute("autoIncrement")) {
autoIncrement = Boolean.parseBoolean(tableElement.getAttribute("autoIncrement"));
}
boolean needAddLimit = true;
if (tableElement.hasAttribute("needAddLimit")) {
needAddLimit = Boolean.parseBoolean(tableElement.getAttribute("needAddLimit"));
}
String tableTypeStr =
tableElement.hasAttribute("type") ? tableElement.getAttribute("type") : null;
int tableType = TableConfig.TYPE_GLOBAL_DEFAULT;
if ("global".equalsIgnoreCase(tableTypeStr)) {
tableType = TableConfig.TYPE_GLOBAL_TABLE;
}
String dataNode = tableElement.getAttribute("dataNode");
TableRuleConfig tableRule = null;
if (tableElement.hasAttribute("rule")) {
String ruleName = tableElement.getAttribute("rule");
tableRule = tableRules.get(ruleName);
if (tableRule == null) {
throw new ConfigException("rule " + ruleName + " is not found!");
}
}
boolean ruleRequired = false;
if (tableElement.hasAttribute("ruleRequired")) {
ruleRequired = Boolean.parseBoolean(tableElement.getAttribute("ruleRequired"));
}
if (tableNames == null) {
throw new ConfigException("table name is not found!");
}
String distPrex = "distribute(";
boolean distTableDns = dataNode.startsWith(distPrex);
if (distTableDns) {
dataNode = dataNode.substring(distPrex.length(), dataNode.length() - 1);
}
for (int j = 0; j < tableNames.length; j++) {
String tableName = tableNames[j];
TableConfig table =
new TableConfig(
tableName,
primaryKey,
autoIncrement,
needAddLimit,
tableType,
dataNode,
getDbType(dataNode),
(tableRule != null) ? tableRule.getRule() : null,
ruleRequired,
null,
false,
null,
null);
checkDataNodeExists(table.getDataNodes());
if (distTableDns) {
distributeDataNodes(table.getDataNodes());
}
if (tables.containsKey(table.getName())) {
throw new ConfigException("table " + tableName + " duplicated!");
}
tables.put(table.getName(), table);
}
if (tableNames.length == 1) {
TableConfig table = tables.get(tableNames[0]);
// process child tables
processChildTables(tables, table, dataNode, tableElement);
}
}
return tables;
}