windyrobin / itier-1

an intermediate tier based on node

# Version 1.0

# 此程序在 node 0.6.6 ~ 0.7.4 下测试通过

你可以按照以下流程来部署测试程序:

#1 运行```sample``` 目录下的 ```service.js```
   ```
      node service.js &
   ```
   这个进程会在3561,3562 端口提供http 服务,来模拟真实的数据源
   用curl 测试如下：
   ```
      curl http://localhost:3561/?fm=m
   ```
   response :
   ```
      { "columns" : ["id","sex"],
        "data" : [ 
          [1,"m"],
          [2,"m"],
          [5,"m"],
          [7,"m"],
          [9,"m"]
        ]
      }
   ```
   ```
      curl http://localhost:3562/?minId=4
   ```
   response:
   ```
      { "columns" : ["id","name","type"], 
        "data" : [ 
          [5,"n5","t5"],
          [6,"n6","t6"],
          [7,"n7","t7"],
          [8,"n8","t8"],
          [9,"n9","t9"],
          [10,"n10","t10"]
        ]
      }
   ````
#2 确认loader 配置正确
   在 src/source/ 下，service_a.js ,service_b.js 为以上两个端口服务相应的loader，
   如果默认的3561,3562 端口被占用，请确认其配置做相应修改

#3 确认sql 模板配置
   目前iTier 仅支持三级目录配置，查看 resources/test/sources/test.json,
   比如 其中有 test_service_a ,test_service_b 相应的sql模板:
   "test_service_a" : {
      "config":"select id as num from service_a.table where ##fm## order by num DESC limit 1,2",
      "params":{
        "fm":[{
          "type":"string",
          "pos":"##fm##"
        }]
      }
   }


#4 启动 iTier 服务 
   运行 run.sh ,默认会在3459端口进行监听（配置见 conf.js）

#5 测试服务 
   现在你可以测试在sql模板配置的所有服务
   测试服务：test_service_a:
   测试命令：curl http://127.0.0.1:3459/test/sources/test/test_service_a/where/fm:eq:f
   后台操作：后台会对 test_service_a 的模板算子 ##fm## 替换为 fm=m
   返回结果：
      { "columns" : ["num"],
        "data":[
          [8],
          [6]
        ]
      }

   测试服务：test_servie_b:
   测试命令：curl http://127.0.0.1:3459/test/sources/test/test_service_b/where/minId:eq:3
   返回结果：
      { "columns":["name"],
        "data":[
          ["n9"],
          ["n8"],
          ["n7"],
          ["n6"],
          ["n5"],
          ["n4"],
          ["n10"]
        ]
      }

   测试命令：test_innerjoin:
   测试命令：curl http://127.0.0.1:3459/test/sources/test/test_innerjoin/where/fm:eq:f/where/minId:eq:3
   后台操作：替换后的sql 语句为
   "select * from service_a.table as sa inner join service_b.table as sb on sa.id=sb.id where fm=f and minId=3"
   返回结果：
      { "columns" : ["id","sex","name","type"],
        "data" : [
          [4,"f","n4","t4"],
          [6,"f","n6","t6"],
          [8,"f","n8","t8"],
          [10,"f","n10","t10"]
        ]
      }