api change : remove udfc handle and epset

source/libs/function/inc/tudf.h

@@ -37,23 +37,24 @@ extern "C" {
 enum {
   UDFC_CODE_STOPPING = -1,
   UDFC_CODE_PIPE_READ_ERR = -2,
-  UDF_CODE_LOAD_UDF_FAILURE = -3,
+  UDFC_CODE_CONNECT_PIPE_ERR = -3,
+  UDFC_CODE_LOAD_UDF_FAILURE = -4,
+  UDFC_CODE_INVALID_STATE = -5
 };
 
-typedef void *UdfcHandle;
 typedef void *UdfcFuncHandle;
 
 /**
  * create udfd proxy, called once in process that call setupUdf/callUdfxxx/teardownUdf
  * @return error code
  */
-int32_t udfcOpen(UdfcHandle* proxyHandle);
+int32_t udfcOpen();
 
 /**
  * destroy udfd proxy
  * @return error code
  */
-int32_t udfcClose(UdfcHandle proxyhandle);
+int32_t udfcClose();
 
 
 /**
@@ -62,7 +63,7 @@ int32_t udfcClose(UdfcHandle proxyhandle);
  * @param handle, out
  * @return error code
  */
-int32_t setupUdf(UdfcHandle proxyHandle, char udfName[], SEpSet *epSet, UdfcFuncHandle *handle);
+int32_t setupUdf(char udfName[], UdfcFuncHandle *handle);
 
 typedef struct SUdfColumnMeta {
   int16_t type;

source/libs/function/inc/tudfInt.h

@@ -39,7 +39,6 @@ enum {
 
 typedef struct SUdfSetupRequest {
   char udfName[TSDB_FUNC_NAME_LEN];
-  SEpSet epSet;
 } SUdfSetupRequest;
 
 typedef struct SUdfSetupResponse {

source/libs/function/src/tudf.c

@@ -137,11 +137,11 @@ typedef struct SUdfdProxy {
   int8_t gUdfcState;
   QUEUE gUdfTaskQueue;
   QUEUE gUvProcTaskQueue;
-  //  int8_t gUdfcState = UDFC_STATE_INITAL;
-  //  QUEUE gUdfTaskQueue = {0};
-  //  QUEUE gUvProcTaskQueue = {0};
+
+  int8_t initialized;
 } SUdfdProxy;
 
+SUdfdProxy gUdfdProxy = {0};
 
 typedef struct SUdfUvSession {
   SUdfdProxy *udfc;
@@ -209,7 +209,6 @@ enum {
   UDFC_STATE_STARTNG, // starting after udfcOpen
   UDFC_STATE_READY, // started and begin to receive quests
   UDFC_STATE_STOPPING, // stopping after udfcClose
-  UDFC_STATUS_FINAL, // stopped
 };
 
 int32_t getUdfdPipeName(char* pipeName, int32_t size) {
@@ -226,13 +225,11 @@ int32_t getUdfdPipeName(char* pipeName, int32_t size) {
 int32_t encodeUdfSetupRequest(void **buf, const SUdfSetupRequest *setup) {
   int32_t len = 0;
   len += taosEncodeBinary(buf, setup->udfName, TSDB_FUNC_NAME_LEN);
-  len += taosEncodeSEpSet(buf, &setup->epSet);
   return len;
 }
 
 void* decodeUdfSetupRequest(const void* buf, SUdfSetupRequest *request) {
   buf = taosDecodeBinaryTo(buf, request->udfName, TSDB_FUNC_NAME_LEN);
-  buf = taosDecodeSEpSet((void*)buf, &request->epSet);
   return (void*)buf;
 }
 
@@ -615,7 +612,7 @@ void onUdfcPipeClose(uv_handle_t *handle) {
 }
 
 int32_t udfcGetUvTaskResponseResult(SClientUdfTask *task, SClientUvTaskNode *uvTask) {
-  debugPrint("%s", "get uv task result");
+  fnDebug("udfc get uv task result. task: %p", task);
   if (uvTask->type == UV_TASK_REQ_RSP) {
     if (uvTask->rspBuf.base != NULL) {
       SUdfResponse rsp;
@@ -658,7 +655,6 @@ int32_t udfcGetUvTaskResponseResult(SClientUdfTask *task, SClientUvTaskNode *uvT
 }
 
 void udfcAllocateBuffer(uv_handle_t *handle, size_t suggestedSize, uv_buf_t *buf) {
-  debugPrint("%s", "client allocate buffer to receive from pipe");
   SClientUvConn *conn = handle->data;
   SClientConnBuf *connBuf = &conn->readBuf;
 
@@ -673,7 +669,7 @@ void udfcAllocateBuffer(uv_handle_t *handle, size_t suggestedSize, uv_buf_t *buf
       buf->base = connBuf->buf;
       buf->len = connBuf->cap;
     } else {
-      //TODO: log error
+      fnError("udfc allocate buffer failure. size: %d", msgHeadSize);
       buf->base = NULL;
       buf->len = 0;
     }
@@ -685,13 +681,13 @@ void udfcAllocateBuffer(uv_handle_t *handle, size_t suggestedSize, uv_buf_t *buf
       buf->base = connBuf->buf + connBuf->len;
       buf->len = connBuf->cap - connBuf->len;
     } else {
-      //TODO: log error free connBuf->buf
+      fnError("udfc re-allocate buffer failure. size: %d", connBuf->cap);
       buf->base = NULL;
       buf->len = 0;
     }
   }
 
-  debugPrint("\tconn buf cap - len - total : %d - %d - %d", connBuf->cap, connBuf->len, connBuf->total);
+  fnTrace("conn buf cap - len - total : %d - %d - %d", connBuf->cap, connBuf->len, connBuf->total);
 
 }
 
@@ -700,6 +696,7 @@ bool isUdfcUvMsgComplete(SClientConnBuf *connBuf) {
     connBuf->total = *(int32_t *) (connBuf->buf);
   }
   if (connBuf->len == connBuf->cap && connBuf->total == connBuf->cap) {
+    fnTrace("udfc complete message is received, now handle it");
     return true;
   }
   return false;
@@ -707,10 +704,10 @@ bool isUdfcUvMsgComplete(SClientConnBuf *connBuf) {
 
 void udfcUvHandleRsp(SClientUvConn *conn) {
   SClientConnBuf *connBuf = &conn->readBuf;
-  int64_t seqNum = *(int64_t *) (connBuf->buf + sizeof(int32_t)); // msglen int32_t then seqnum
+  int64_t seqNum = *(int64_t *) (connBuf->buf + sizeof(int32_t)); // msglen then seqnum
 
   if (QUEUE_EMPTY(&conn->taskQueue)) {
-    //LOG error
+    fnError("udfc no task waiting for response on connection");
     return;
   }
   bool found = false;
@@ -724,7 +721,7 @@ void udfcUvHandleRsp(SClientUvConn *conn) {
         found = true;
         taskFound = task;
       } else {
-        //LOG error;
+        fnError("udfc more than one task waiting for the same response");
         continue;
       }
     }
@@ -738,7 +735,7 @@ void udfcUvHandleRsp(SClientUvConn *conn) {
     uv_sem_post(&taskFound->taskSem);
     QUEUE_REMOVE(&taskFound->procTaskQueue);
   } else {
-    //TODO: LOG error
+    fnError("no task is waiting for the response.");
   }
   connBuf->buf = NULL;
   connBuf->total = -1;
@@ -762,7 +759,7 @@ void udfcUvHandleError(SClientUvConn *conn) {
 }
 
 void onUdfcRead(uv_stream_t *client, ssize_t nread, const uv_buf_t *buf) {
-  debugPrint("%s, nread: %zd", "client read from pipe", nread);
+  fnTrace("udfc client %p, client read from pipe. nread: %zd", client, nread);
   if (nread == 0) return;
 
   SClientUvConn *conn = client->data;
@@ -775,9 +772,9 @@ void onUdfcRead(uv_stream_t *client, ssize_t nread, const uv_buf_t *buf) {
 
   }
   if (nread < 0) {
-    debugPrint("\tclient read error: %s", uv_strerror(nread));
+    fnError("udfc client pipe %p read error: %s", client, uv_strerror(nread));
     if (nread == UV_EOF) {
-      //TODO:
+      fnError("udfc client pipe %p closed", client);
     }
     udfcUvHandleError(conn);
   }
@@ -785,16 +782,15 @@ void onUdfcRead(uv_stream_t *client, ssize_t nread, const uv_buf_t *buf) {
 }
 
 void onUdfClientWrite(uv_write_t *write, int status) {
-  debugPrint("%s", "after writing to pipe");
   SClientUvTaskNode *uvTask = write->data;
+  uv_pipe_t *pipe = uvTask->pipe;
   if (status == 0) {
-    uv_pipe_t *pipe = uvTask->pipe;
     SClientUvConn *conn = pipe->data;
     QUEUE_INSERT_TAIL(&conn->taskQueue, &uvTask->connTaskQueue);
   } else {
-    //TODO Log error;
+    fnError("udfc client %p write error.", pipe);
   }
-  debugPrint("\tlength:%zu", uvTask->reqBuf.len);
+  fnTrace("udfc client %p write length:%zu", pipe, uvTask->reqBuf.len);
   taosMemoryFree(write);
   taosMemoryFree(uvTask->reqBuf.base);
 }
@@ -852,7 +848,7 @@ int32_t createUdfcUvTask(SClientUdfTask *task, int8_t uvTaskType, SClientUvTaskN
 }
 
 int32_t queueUvUdfTask(SClientUvTaskNode *uvTask) {
-  debugPrint("%s, %d", "queue uv task", uvTask->type);
+  fnTrace("queue uv task to event loop, task: %d, %p", uvTask->type, uvTask);
   SUdfdProxy *udfc = uvTask->udfc;
   uv_mutex_lock(&udfc->gUdfTaskQueueMutex);
   QUEUE_INSERT_TAIL(&udfc->gUdfTaskQueue, &uvTask->recvTaskQueue);
@@ -866,7 +862,7 @@ int32_t queueUvUdfTask(SClientUvTaskNode *uvTask) {
 }
 
 int32_t startUvUdfTask(SClientUvTaskNode *uvTask) {
-  debugPrint("%s, type %d", "start uv task ", uvTask->type);
+  fnTrace("event loop start uv task. task: %d, %p", uvTask->type, uvTask);
   switch (uvTask->type) {
     case UV_TASK_CONNECT: {
       uv_pipe_t *pipe = taosMemoryMalloc(sizeof(uv_pipe_t));
@@ -981,27 +977,37 @@ void constructUdfService(void *argsThread) {
   uv_loop_close(&udfc->gUdfdLoop);
 }
 
-int32_t udfcOpen(UdfcHandle *udfc) {
-  SUdfdProxy *proxy = taosMemoryCalloc(1, sizeof(SUdfdProxy));
+int32_t udfcOpen() {
+  int8_t old = atomic_val_compare_exchange_8(&gUdfdProxy.initialized, 0, 1);
+  if (old == 1) {
+    return 0;
+  }
+  SUdfdProxy *proxy = &gUdfdProxy;
   getUdfdPipeName(proxy->udfdPipeName, UDF_LISTEN_PIPE_NAME_LEN);
   proxy->gUdfcState = UDFC_STATE_STARTNG;
   uv_barrier_init(&proxy->gUdfInitBarrier, 2);
   uv_thread_create(&proxy->gUdfLoopThread, constructUdfService, proxy);
-  uv_barrier_wait(&proxy->gUdfInitBarrier);
+  atomic_store_8(&proxy->gUdfcState, UDFC_STATE_READY);
   proxy->gUdfcState = UDFC_STATE_READY;
-  *udfc = proxy;
+  uv_barrier_wait(&proxy->gUdfInitBarrier);
+  fnInfo("udfc initialized")
   return 0;
 }
 
-int32_t udfcClose(UdfcHandle udfcHandle) {
-  SUdfdProxy *udfc = udfcHandle;
+int32_t udfcClose() {
+  int8_t old = atomic_val_compare_exchange_8(&gUdfdProxy.initialized, 1, 0);
+  if (old == 0) {
+    return 0;
+  }
+
+  SUdfdProxy *udfc = &gUdfdProxy;
   udfc->gUdfcState = UDFC_STATE_STOPPING;
   uv_async_send(&udfc->gUdfLoopStopAsync);
   uv_thread_join(&udfc->gUdfLoopThread);
   uv_mutex_destroy(&udfc->gUdfTaskQueueMutex);
   uv_barrier_destroy(&udfc->gUdfInitBarrier);
-  udfc->gUdfcState = UDFC_STATUS_FINAL;
-  taosMemoryFree(udfc);
+  udfc->gUdfcState = UDFC_STATE_INITAL;
+  fnInfo("udfc cleaned up");
   return 0;
 }
 
@@ -1019,29 +1025,36 @@ int32_t udfcRunUvTask(SClientUdfTask *task, int8_t uvTaskType) {
   return task->errCode;
 }
 
-int32_t setupUdf(UdfcHandle udfc, char udfName[], SEpSet *epSet, UdfcFuncHandle *funcHandle) {
-  debugPrint("%s", "client setup udf");
+int32_t setupUdf(char udfName[], UdfcFuncHandle *funcHandle) {
+  fnInfo("udfc setup udf. udfName: %s", udfName);
+  if (gUdfdProxy.gUdfcState != UDFC_STATE_READY) {
+    return UDFC_CODE_INVALID_STATE;
+  }
   SClientUdfTask *task = taosMemoryMalloc(sizeof(SClientUdfTask));
   task->errCode = 0;
   task->session = taosMemoryMalloc(sizeof(SUdfUvSession));
-  task->session->udfc = udfc;
+  task->session->udfc = &gUdfdProxy;
   task->type = UDF_TASK_SETUP;
 
   SUdfSetupRequest *req = &task->_setup.req;
   memcpy(req->udfName, udfName, TSDB_FUNC_NAME_LEN);
-  req->epSet = *epSet;
 
   int32_t errCode = udfcRunUvTask(task, UV_TASK_CONNECT);
   if (errCode != 0) {
-    //TODO: log error
-    return -1;
+    fnError("failed to connect to pipe. udfName: %s, pipe: %s", udfName, (&gUdfdProxy)->udfdPipeName);
+    return UDFC_CODE_CONNECT_PIPE_ERR;
   }
 
   udfcRunUvTask(task, UV_TASK_REQ_RSP);
 
   SUdfSetupResponse *rsp = &task->_setup.rsp;
   task->session->severHandle = rsp->udfHandle;
-  *funcHandle = task->session;
+  if (task->errCode != 0) {
+    fnError("failed to setup udf. err: %d", task->errCode)
+  } else {
+    fnInfo("sucessfully setup udf func handle. handle: %p", task->session);
+    *funcHandle = task->session;
+  }
   int32_t err = task->errCode;
   taosMemoryFree(task);
   return err;
@@ -1049,7 +1062,7 @@ int32_t setupUdf(UdfcHandle udfc, char udfName[], SEpSet *epSet, UdfcFuncHandle
 
 int32_t callUdf(UdfcFuncHandle handle, int8_t callType, SSDataBlock *input, SUdfInterBuf *state, SUdfInterBuf *state2,
                 SSDataBlock* output, SUdfInterBuf *newState) {
-  debugPrint("%s", "client call udf");
+  fnTrace("udfc call udf. callType: %d, funcHandle: %p", callType, handle);
 
   SClientUdfTask *task = taosMemoryMalloc(sizeof(SClientUdfTask));
   task->errCode = 0;
@@ -1087,35 +1100,37 @@ int32_t callUdf(UdfcFuncHandle handle, int8_t callType, SSDataBlock *input, SUdf
 
   udfcRunUvTask(task, UV_TASK_REQ_RSP);
 
-  SUdfCallResponse *rsp = &task->_call.rsp;
-  switch (callType) {
-    case TSDB_UDF_CALL_AGG_INIT: {
-      *newState = rsp->resultBuf;
-      break;
-    }
-    case TSDB_UDF_CALL_AGG_PROC: {
-      *newState = rsp->resultBuf;
-      break;
-    }
-    case TSDB_UDF_CALL_AGG_MERGE: {
-      *newState = rsp->resultBuf;
-      break;
-    }
-    case TSDB_UDF_CALL_AGG_FIN: {
-      *newState = rsp->resultBuf;
-      break;
-    }
-    case TSDB_UDF_CALL_SCALA_PROC: {
-      *output = rsp->resultData;
-      break;
+  if (task->errCode != 0) {
+    fnError("call udf failure. err: %d", task->errCode);
+  } else {
+    SUdfCallResponse *rsp = &task->_call.rsp;
+    switch (callType) {
+      case TSDB_UDF_CALL_AGG_INIT: {
+        *newState = rsp->resultBuf;
+        break;
+      }
+      case TSDB_UDF_CALL_AGG_PROC: {
+        *newState = rsp->resultBuf;
+        break;
+      }
+      case TSDB_UDF_CALL_AGG_MERGE: {
+        *newState = rsp->resultBuf;
+        break;
+      }
+      case TSDB_UDF_CALL_AGG_FIN: {
+        *newState = rsp->resultBuf;
+        break;
+      }
+      case TSDB_UDF_CALL_SCALA_PROC: {
+        *output = rsp->resultData;
+        break;
+      }
     }
   }
-
   taosMemoryFree(task);
   return task->errCode;
 }
 
-//TODO: translate these calls to callUdf
 int32_t callUdfAggInit(UdfcFuncHandle handle, SUdfInterBuf *interBuf) {
   int8_t callType = TSDB_UDF_CALL_AGG_INIT;
 
@@ -1159,7 +1174,7 @@ int32_t callUdfScalarFunc(UdfcFuncHandle handle, SScalarParam *input, int32_t nu
 }
 
 int32_t teardownUdf(UdfcFuncHandle handle) {
-  debugPrint("%s", "client teardown udf");
+  fnInfo("tear down udf. udf func handle: %p", handle);
 
   SClientUdfTask *task = taosMemoryMalloc(sizeof(SClientUdfTask));
   task->errCode = 0;
@@ -1171,7 +1186,6 @@ int32_t teardownUdf(UdfcFuncHandle handle) {
 
   udfcRunUvTask(task, UV_TASK_REQ_RSP);
 
-
   SUdfTeardownResponse *rsp = &task->_teardown.rsp;
 
   int32_t err = task->errCode;

source/libs/function/src/udfd.c

@@ -20,6 +20,7 @@
 #include "tudf.h"
 #include "tudfInt.h"
 
+#include "tdatablock.h"
 #include "tdataformat.h"
 #include "tglobal.h"
 #include "tmsg.h"
@@ -31,8 +32,9 @@ typedef struct SUdfdContext {
   uv_signal_t intrSignal;
   char        listenPipeName[UDF_LISTEN_PIPE_NAME_LEN];
   uv_pipe_t   listeningPipe;
-  void       *clientRpc;
 
+  void       *clientRpc;
+  SCorEpSet  mgmtEp;
   uv_mutex_t udfsMutex;
   SHashObj  *udfsHash;
 
@@ -83,17 +85,17 @@ typedef struct SUdfcFuncHandle {
   SUdf *udf;
 } SUdfcFuncHandle;
 
-int32_t udfdFillUdfInfoFromMNode(void *clientRpc, SEpSet *pEpSet, char *udfName, SUdf *udf);
+int32_t udfdFillUdfInfoFromMNode(void *clientRpc, char *udfName, SUdf *udf);
 
-int32_t udfdLoadUdf(char *udfName, SEpSet *pEpSet, SUdf *udf) {
+int32_t udfdLoadUdf(char *udfName, SUdf *udf) {
   strcpy(udf->name, udfName);
 
-  udfdFillUdfInfoFromMNode(global.clientRpc, pEpSet, udf->name, udf);
+  udfdFillUdfInfoFromMNode(global.clientRpc, udf->name, udf);
   //strcpy(udf->path, "/home/slzhou/TDengine/debug/build/lib/libudf1.so");
   int err = uv_dlopen(udf->path, &udf->lib);
   if (err != 0) {
     fnError("can not load library %s. error: %s", udf->path, uv_strerror(err));
-    return UDF_CODE_LOAD_UDF_FAILURE;
+    return UDFC_CODE_LOAD_UDF_FAILURE;
   }
   // TODO: find all the functions
   char normalFuncName[TSDB_FUNC_NAME_LEN] = {0};
@@ -140,7 +142,7 @@ void udfdProcessRequest(uv_work_t *req) {
       uv_mutex_lock(&udf->lock);
       if (udf->state == UDF_STATE_INIT) {
         udf->state = UDF_STATE_LOADING;
-        udfdLoadUdf(setup->udfName, &setup->epSet, udf);
+        udfdLoadUdf(setup->udfName, udf);
         udf->state = UDF_STATE_READY;
         uv_cond_broadcast(&udf->condReady);
         uv_mutex_unlock(&udf->lock);
@@ -398,7 +400,48 @@ void udfdIntrSignalHandler(uv_signal_t *handle, int signum) {
 
 void udfdProcessRpcRsp(void *parent, SRpcMsg *pMsg, SEpSet *pEpSet) { return; }
 
-int32_t udfdFillUdfInfoFromMNode(void *clientRpc, SEpSet *pEpSet, char *udfName, SUdf *udf) {
+int initEpSetFromCfg(const char* firstEp, const char* secondEp, SCorEpSet* pEpSet) {
+  pEpSet->version = 0;
+
+  // init mnode ip set
+  SEpSet* mgmtEpSet = &(pEpSet->epSet);
+  mgmtEpSet->numOfEps = 0;
+  mgmtEpSet->inUse = 0;
+
+  if (firstEp && firstEp[0] != 0) {
+    if (strlen(firstEp) >= TSDB_EP_LEN) {
+      terrno = TSDB_CODE_TSC_INVALID_FQDN;
+      return -1;
+    }
+
+    int32_t code = taosGetFqdnPortFromEp(firstEp, &mgmtEpSet->eps[0]);
+    if (code != TSDB_CODE_SUCCESS) {
+      terrno = TSDB_CODE_TSC_INVALID_FQDN;
+      return terrno;
+    }
+
+    mgmtEpSet->numOfEps++;
+  }
+
+  if (secondEp && secondEp[0] != 0) {
+    if (strlen(secondEp) >= TSDB_EP_LEN) {
+      terrno = TSDB_CODE_TSC_INVALID_FQDN;
+      return -1;
+    }
+
+    taosGetFqdnPortFromEp(secondEp, &mgmtEpSet->eps[mgmtEpSet->numOfEps]);
+    mgmtEpSet->numOfEps++;
+  }
+
+  if (mgmtEpSet->numOfEps == 0) {
+    terrno = TSDB_CODE_TSC_INVALID_FQDN;
+    return -1;
+  }
+
+  return 0;
+}
+
+int32_t udfdFillUdfInfoFromMNode(void *clientRpc, char *udfName, SUdf *udf) {
   SRetrieveFuncReq retrieveReq = {0};
   retrieveReq.numOfFuncs = 1;
   retrieveReq.pFuncNames = taosArrayInit(1, TSDB_FUNC_NAME_LEN);
@@ -415,7 +458,7 @@ int32_t udfdFillUdfInfoFromMNode(void *clientRpc, SEpSet *pEpSet, char *udfName,
   rpcMsg.msgType = TDMT_MND_RETRIEVE_FUNC;
 
   SRpcMsg rpcRsp = {0};
-  rpcSendRecv(clientRpc, pEpSet, &rpcMsg, &rpcRsp);
+  rpcSendRecv(clientRpc, &global.mgmtEp.epSet, &rpcMsg, &rpcRsp);
   SRetrieveFuncRsp retrieveRsp = {0};
   tDeserializeSRetrieveFuncRsp(rpcRsp.pCont, rpcRsp.contLen, &retrieveRsp);
 
@@ -618,5 +661,6 @@ int main(int argc, char *argv[]) {
     return -1;
   }
 
+  initEpSetFromCfg(tsFirst, tsSecond, &global.mgmtEp);
   return udfdRun();
 }

source/libs/function/test/runUdf.c

 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-
 #include "uv.h"
+
+#include "fnLog.h"
 #include "os.h"
-#include "tudf.h"
 #include "tdatablock.h"
+#include "tglobal.h"
+#include "tudf.h"
 
-int main(int argc, char *argv[]) {
-  UdfcHandle udfc;
-  udfcOpen(&udfc);
-    uv_sleep(1000);
-    char path[256] = {0};
-    size_t cwdSize = 256;
-    int err = uv_cwd(path, &cwdSize);
-    if (err != 0) {
-        fprintf(stderr, "err cwd: %s\n", uv_strerror(err));
-	    return err;
+static int32_t parseArgs(int32_t argc, char *argv[]) {
+  for (int32_t i = 1; i < argc; ++i) {
+    if (strcmp(argv[i], "-c") == 0) {
+      if (i < argc - 1) {
+        if (strlen(argv[++i]) >= PATH_MAX) {
+          printf("config file path overflow");
+          return -1;
+        }
+        tstrncpy(configDir, argv[i], PATH_MAX);
+      } else {
+        printf("'-c' requires a parameter, default is %s\n", configDir);
+        return -1;
+      }
     }
-    fprintf(stdout, "current working directory:%s\n", path);
-    strcat(path, "/libudf1.so");
+  }
 
-    UdfcFuncHandle handle;
-    SEpSet epSet;
-    epSet.inUse = 0;
-    taosGetFqdnPortFromEp("localhost:7100", &epSet.eps[0]);
-    taosGetFqdnPortFromEp("localhost:7200", &epSet.eps[1]);
-    epSet.numOfEps = 2;
-    setupUdf(udfc, "udf1", &epSet, &handle);
+  return 0;
+}
 
-    SSDataBlock block = {0};
-    SSDataBlock* pBlock = &block;
-    pBlock->pDataBlock = taosArrayInit(1, sizeof(SColumnInfoData));
-    pBlock->info.numOfCols = 1;
-    pBlock->info.rows = 4;
-    char data[16] = {0};
-    char bitmap[4] = {0};
-    for (int32_t i = 0; i < pBlock->info.numOfCols; ++i) {
-      SColumnInfoData colInfo = {0};
-      colInfo.info.type = TSDB_DATA_TYPE_INT;
-      colInfo.info.bytes = sizeof(int32_t);
-      colInfo.info.colId = 1;
-      colInfo.pData = data;
-      colInfo.nullbitmap = bitmap;
-      for (int32_t j = 0; j < pBlock->info.rows; ++j) {
-        colDataAppendInt32(&colInfo, j, &j);
-      }
-      taosArrayPush(pBlock->pDataBlock, &colInfo);
-    }
+static int32_t initLog() {
+  char logName[12] = {0};
+  snprintf(logName, sizeof(logName), "%slog", "udfc");
+  return taosCreateLog(logName, 1, configDir, NULL, NULL, NULL, 0);
+}
+
+int main(int argc, char *argv[]) {
+  parseArgs(argc, argv);
+  initLog();
+  if (taosInitCfg(configDir, NULL, NULL, NULL, 0) != 0) {
+    fnError("failed to start since read config error");
+    return -1;
+  }
 
-    SScalarParam input = {0};
-    input.numOfRows = pBlock->info.rows;
-    input.columnData = taosArrayGet(pBlock->pDataBlock, 0);
-    SScalarParam output = {0};
-    callUdfScalarFunc(handle, &input, 1 , &output);
+  udfcOpen();
+  uv_sleep(1000);
 
-    SColumnInfoData *col = output.columnData;
-    for (int32_t i = 0; i < output.numOfRows; ++i) {
-      fprintf(stderr, "%d\t%d\n" , i, *(int32_t*)(col->pData + i *sizeof(int32_t)));
+  UdfcFuncHandle handle;
+
+  setupUdf("udf1", &handle);
+
+  SSDataBlock  block = {0};
+  SSDataBlock *pBlock = &block;
+  pBlock->pDataBlock = taosArrayInit(1, sizeof(SColumnInfoData));
+  pBlock->info.numOfCols = 1;
+  pBlock->info.rows = 4;
+  char data[16] = {0};
+  char bitmap[4] = {0};
+  for (int32_t i = 0; i < pBlock->info.numOfCols; ++i) {
+    SColumnInfoData colInfo = {0};
+    colInfo.info.type = TSDB_DATA_TYPE_INT;
+    colInfo.info.bytes = sizeof(int32_t);
+    colInfo.info.colId = 1;
+    colInfo.pData = data;
+    colInfo.nullbitmap = bitmap;
+    for (int32_t j = 0; j < pBlock->info.rows; ++j) {
+      colDataAppendInt32(&colInfo, j, &j);
     }
-    teardownUdf(handle);
+    taosArrayPush(pBlock->pDataBlock, &colInfo);
+  }
+
+  SScalarParam input = {0};
+  input.numOfRows = pBlock->info.rows;
+  input.columnData = taosArrayGet(pBlock->pDataBlock, 0);
+  SScalarParam output = {0};
+  callUdfScalarFunc(handle, &input, 1, &output);
 
-    udfcClose(udfc);
+  SColumnInfoData *col = output.columnData;
+  for (int32_t i = 0; i < output.numOfRows; ++i) {
+    fprintf(stderr, "%d\t%d\n", i, *(int32_t *)(col->pData + i * sizeof(int32_t)));
+  }
+  teardownUdf(handle);
+  udfcClose();
 }