feat(driver): jdbc add tmq seek function

source/client/jni/com_taosdata_jdbc_tmq_TMQConnector.h

@@ -166,6 +166,12 @@ JNIEXPORT jstring JNICALL Java_com_taosdata_jdbc_tmq_TMQConnector_tmqGetTableNam
 JNIEXPORT jint JNICALL Java_com_taosdata_jdbc_tmq_TMQConnector_fetchRawBlockImp(JNIEnv *, jobject, jlong, jlong,
                                                                                 jobject, jobject);
 
+JNIEXPORT jint JNICALL Java_com_taosdata_jdbc_tmq_TMQConnector_tmqSeekImp(JNIEnv *, jobject, jlong, jstring, jint,
+                                                                          jlong);
+
+JNIEXPORT jint JNICALL Java_com_taosdata_jdbc_tmq_TMQConnector_tmqGetTopicAssignmentImp(JNIEnv *, jobject, jlong,
+                                                                                        jstring, jobject);
+
 #ifdef __cplusplus
 }
 #endif

source/client/src/clientTmqConnector.c

@@ -17,9 +17,16 @@
 #include "jniCommon.h"
 #include "taos.h"
 
-int __init_tmq = 0;
+int       __init_tmq = 0;
 jmethodID g_offsetCallback;
 
+jclass    g_assignmentClass;
+jmethodID g_assignmentConstructor;
+jmethodID g_assignmentSetVgId;
+jmethodID g_assignmentSetCurrentOffset;
+jmethodID g_assignmentSetBegin;
+jmethodID g_assignmentSetEnd;
+
 void tmqGlobalMethod(JNIEnv *env) {
   // make sure init function executed once
   switch (atomic_val_compare_exchange_32(&__init_tmq, 0, 1)) {
@@ -46,6 +53,38 @@ void tmqGlobalMethod(JNIEnv *env) {
   jniDebug("tmq method register finished");
 }
 
+int  __init_assignment = 0;
+void tmqAssignmentMethod(JNIEnv *env) {
+  // make sure init function executed once
+  switch (atomic_val_compare_exchange_32(&__init_assignment, 0, 1)) {
+    case 0:
+      break;
+    case 1:
+      do {
+        taosMsleep(0);
+      } while (atomic_load_32(&__init_assignment) == 1);
+    case 2:
+      return;
+  }
+
+  if (g_vm == NULL) {
+    (*env)->GetJavaVM(env, &g_vm);
+  }
+
+  jclass assignment = (*env)->FindClass(env, "com/taosdata/jdbc/tmq/Assignment");
+  g_assignmentClass = (*env)->NewGlobalRef(env, assignment);
+  g_assignmentConstructor = (*env)->GetMethodID(env, g_assignmentClass, "<init>", "()V");
+  g_assignmentSetVgId = (*env)->GetMethodID(env, g_assignmentClass, "setVgId", "(I)V");                    // int
+  g_assignmentSetCurrentOffset = (*env)->GetMethodID(env, g_assignmentClass, "setCurrentOffset", "(J)V");  // long
+  g_assignmentSetBegin = (*env)->GetMethodID(env, g_assignmentClass, "setBegin", "(J)V");                  // long
+  g_assignmentSetEnd = (*env)->GetMethodID(env, g_assignmentClass, "setEnd", "(J)V");                      // long
+
+  (*env)->DeleteLocalRef(env, assignment);
+
+  atomic_store_32(&__init_assignment, 2);
+  jniDebug("tmq method assignment finished");
+}
+
 // deprecated
 void commit_cb(tmq_t *tmq, int32_t code, void *param) {
   JNIEnv *env = NULL;
@@ -266,8 +305,9 @@ JNIEXPORT void JNICALL Java_com_taosdata_jdbc_tmq_TMQConnector_tmqCommitAsync(JN
   tmq_commit_async(tmq, res, commit_cb, consumer);
 }
 
-JNIEXPORT void JNICALL Java_com_taosdata_jdbc_tmq_TMQConnector_consumerCommitAsync(JNIEnv *env, jobject jobj, jlong jtmq,
-                                                                              jlong jres, jobject offset) {
+JNIEXPORT void JNICALL Java_com_taosdata_jdbc_tmq_TMQConnector_consumerCommitAsync(JNIEnv *env, jobject jobj,
+                                                                                   jlong jtmq, jlong jres,
+                                                                                   jobject offset) {
   tmqGlobalMethod(env);
   tmq_t *tmq = (tmq_t *)jtmq;
   if (tmq == NULL) {
@@ -369,7 +409,8 @@ JNIEXPORT jint JNICALL Java_com_taosdata_jdbc_tmq_TMQConnector_fetchRawBlockImp(
       jniDebug("jobj:%p, conn:%p, resultset:%p, no data to retrieve", jobj, tscon, (void *)res);
       return JNI_FETCH_END;
     } else {
-      jniError("jobj:%p, conn:%p, query interrupted, tmq fetch block error code:%d, msg:%s", jobj, tscon, error_code, taos_errstr(tres));
+      jniError("jobj:%p, conn:%p, query interrupted, tmq fetch block error code:%d, msg:%s", jobj, tscon, error_code,
+               taos_errstr(tres));
       return JNI_RESULT_SET_NULL;
     }
   }
@@ -399,3 +440,72 @@ JNIEXPORT jint JNICALL Java_com_taosdata_jdbc_tmq_TMQConnector_fetchRawBlockImp(
   (*env)->CallVoidMethod(env, rowobj, g_blockdataSetByteArrayFp, jniFromNCharToByteArray(env, (char *)data, len));
   return JNI_SUCCESS;
 }
+
+JNIEXPORT jint JNICALL Java_com_taosdata_jdbc_tmq_TMQConnector_tmqSeekImp(JNIEnv *env, jobject jobj, jlong jtmq,
+                                                                          jstring jtopic, jint partition,
+                                                                          jlong offset) {
+  tmq_t *tmq = (tmq_t *)jtmq;
+  if (tmq == NULL) {
+    jniDebug("jobj:%p, tmq is closed", jobj);
+    return TMQ_CONSUMER_NULL;
+  }
+
+  if (jtopic == NULL) {
+    jniDebug("jobj:%p, topic is null", jobj);
+    return TMQ_TOPIC_NULL;
+  }
+  const char *topicName = (*env)->GetStringUTFChars(env, jtopic, NULL);
+
+  int32_t res = tmq_offset_seek(tmq, topicName, partition, offset);
+
+  if (res != TSDB_CODE_SUCCESS) {
+    jniError("jobj:%p, tmq seek error, code:%d, msg:%s", jobj, res, tmq_err2str(res));
+  }
+
+  (*env)->ReleaseStringUTFChars(env, jtopic, topicName);
+  return (jint)res;
+}
+
+JNIEXPORT jint JNICALL Java_com_taosdata_jdbc_tmq_TMQConnector_tmqGetTopicAssignmentImp(JNIEnv *env, jobject jobj,
+                                                                                        jlong jtmq, jstring jtopic,
+                                                                                        jobject jarrayList) {
+  tmqAssignmentMethod(env);
+  tmq_t *tmq = (tmq_t *)jtmq;
+  if (tmq == NULL) {
+    jniDebug("jobj:%p, tmq is closed", jobj);
+    return TMQ_CONSUMER_NULL;
+  }
+
+  if (jtopic == NULL) {
+    jniDebug("jobj:%p, topic is null", jobj);
+    return TMQ_TOPIC_NULL;
+  }
+
+  const char *topicName = (*env)->GetStringUTFChars(env, jtopic, NULL);
+
+  tmq_topic_assignment *pAssign = NULL;
+  int32_t               numOfAssignment = 0;
+  int32_t               res = tmq_get_topic_assignment(tmq, topicName, &pAssign, &numOfAssignment);
+
+  if (res != TSDB_CODE_SUCCESS) {
+    (*env)->ReleaseStringUTFChars(env, jtopic, topicName);
+    jniError("jobj:%p, tmq get topic assignment error, topic:%s, code:%d, msg:%s", jobj, topicName, res,
+             tmq_err2str(res));
+    taosMemoryFree(pAssign);
+    return (jint)res;
+  }
+
+  (*env)->ReleaseStringUTFChars(env, jtopic, topicName);
+
+  for (int i = 0; i < numOfAssignment; ++i) {
+    tmq_topic_assignment assignment = pAssign[i];
+    jobject              jassignment = (*env)->NewObject(env, g_assignmentClass, g_assignmentConstructor);
+    (*env)->CallVoidMethod(env, jassignment, g_assignmentSetVgId, assignment.vgId);
+    (*env)->CallVoidMethod(env, jassignment, g_assignmentSetCurrentOffset, assignment.currentOffset);
+    (*env)->CallVoidMethod(env, jassignment, g_assignmentSetBegin, assignment.begin);
+    (*env)->CallVoidMethod(env, jassignment, g_assignmentSetEnd, assignment.end);
+    (*env)->CallBooleanMethod(env, jarrayList, g_arrayListAddFp, jassignment);
+  }
+  taosMemoryFree(pAssign);
+  return JNI_SUCCESS;
+}