/**
* 获取第一个节点作为路由
*
* @param rrs 数据路由集合
* @param dataNode 数据库所在节点
* @param stmt 执行语句
* @return 数据路由集合
* @author mycat
*/
public static RouteResultset routeToSingleNode(RouteResultset rrs, String dataNode, String stmt) {
if (dataNode == null) {
return rrs;
}
RouteResultsetNode[] nodes = new RouteResultsetNode[1];
nodes[0] = new RouteResultsetNode(dataNode, rrs.getSqlType(), stmt); // rrs.getStatement()
rrs.setNodes(nodes);
rrs.setFinishedRoute(true);
if (rrs.getCanRunInReadDB() != null) {
nodes[0].setCanRunInReadDB(rrs.getCanRunInReadDB());
}
return rrs;
}
public static void routeForTableMeta(
RouteResultset rrs, SchemaConfig schema, String tableName, String sql) {
String dataNode = null;
if (isNoSharding(schema, tableName)) { // 不分库的直接从schema中获取dataNode
dataNode = schema.getDataNode();
} else {
dataNode = getMetaReadDataNode(schema, tableName);
}
RouteResultsetNode[] nodes = new RouteResultsetNode[1];
nodes[0] = new RouteResultsetNode(dataNode, rrs.getSqlType(), sql);
if (rrs.getCanRunInReadDB() != null) {
nodes[0].setCanRunInReadDB(rrs.getCanRunInReadDB());
}
rrs.setNodes(nodes);
}
public static RouteResultset routeToMultiNode(
boolean cache, RouteResultset rrs, Collection<String> dataNodes, String stmt) {
RouteResultsetNode[] nodes = new RouteResultsetNode[dataNodes.size()];
int i = 0;
RouteResultsetNode node;
for (String dataNode : dataNodes) {
node = new RouteResultsetNode(dataNode, rrs.getSqlType(), stmt);
if (rrs.getCanRunInReadDB() != null) {
node.setCanRunInReadDB(rrs.getCanRunInReadDB());
}
nodes[i++] = node;
}
rrs.setCacheAble(cache);
rrs.setNodes(nodes);
return rrs;
}