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enh: java connector support get table vgid (#18981) #19034

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merged 1 commit into from
Dec 20, 2022
Merged

enh: java connector support get table vgid (#18981) #19034

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8 changes: 8 additions & 0 deletions source/client/jni/com_taosdata_jdbc_TSDBJNIConnector.h
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Original file line number Diff line number Diff line change
Expand Up @@ -260,6 +260,14 @@ JNIEXPORT jint JNICALL Java_com_taosdata_jdbc_TSDBJNIConnector_insertLinesImp(JN
JNIEXPORT jlong JNICALL Java_com_taosdata_jdbc_TSDBJNIConnector_schemalessInsertImp(JNIEnv *, jobject, jobjectArray,
jlong, jint, jint);

/**
* Class: com_taosdata_jdbc_TSDBJNIConnector
* Method: getTableVgID
* Signature: (Ljava/lang/String;Ljava/lang/String)Lcom/taosdata/jdbc/VGroupIDResp
*/
JNIEXPORT jobject JNICALL Java_com_taosdata_jdbc_TSDBJNIConnector_getTableVgID(JNIEnv *, jobject, jlong, jstring,
jstring, jobject);

#ifdef __cplusplus
}
#endif
Expand Down
65 changes: 63 additions & 2 deletions source/client/src/clientJniConnector.c
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Original file line number Diff line number Diff line change
Expand Up @@ -488,7 +488,8 @@ JNIEXPORT jint JNICALL Java_com_taosdata_jdbc_TSDBJNIConnector_fetchRowImp(JNIEn
numOfFields);
return JNI_FETCH_END;
} else {
jniDebug("jobj:%p, conn:%p, interrupted query. fetch row error code: %d, msg:%s", jobj, tscon, code, taos_errstr(result));
jniDebug("jobj:%p, conn:%p, interrupted query. fetch row error code: %d, msg:%s", jobj, tscon, code,
taos_errstr(result));
return JNI_RESULT_SET_NULL;
}
}
Expand Down Expand Up @@ -583,7 +584,8 @@ JNIEXPORT jint JNICALL Java_com_taosdata_jdbc_TSDBJNIConnector_fetchBlockImp(JNI
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. fetch block error code:%d, msg:%s", jobj, tscon, error_code, taos_errstr(tres));
jniError("jobj:%p, conn:%p, query interrupted. fetch block error code:%d, msg:%s", jobj, tscon, error_code,
taos_errstr(tres));
return JNI_RESULT_SET_NULL;
}
}
Expand Down Expand Up @@ -1028,3 +1030,62 @@ JNIEXPORT jlong JNICALL Java_com_taosdata_jdbc_TSDBJNIConnector_schemalessInsert
}
return (jlong)tres;
}

// TABLE_VG_ID_FID_CACHE cache resp object for getTableVgID
typedef struct TABLE_VG_ID_FIELD_CACHE {
int cached;
jclass clazz;
jfieldID codeField;
jfieldID vgIDField;
} TABLE_VG_ID_FIELD_CACHE;

TABLE_VG_ID_FIELD_CACHE tableVgIdFieldCache;

void cacheTableVgIDField(JNIEnv *env, jobject jobj) {
if (tableVgIdFieldCache.cached) {
return;
}

tableVgIdFieldCache.clazz = (*env)->GetObjectClass(env, jobj);
tableVgIdFieldCache.codeField = (*env)->GetFieldID(env, tableVgIdFieldCache.clazz, "code", "I");
tableVgIdFieldCache.vgIDField = (*env)->GetFieldID(env, tableVgIdFieldCache.clazz, "vgID", "I");
tableVgIdFieldCache.cached = 1;
}

JNIEXPORT jobject JNICALL Java_com_taosdata_jdbc_TSDBJNIConnector_getTableVgID(JNIEnv *env, jobject jobj, jlong conn,
jstring jdb, jstring jtable,
jobject resp) {
if (!tableVgIdFieldCache.cached) {
cacheTableVgIDField(env, resp);
}

TAOS *taos = (TAOS *)conn;
if (taos == NULL) {
jniError("jobj:%p, connection already closed", jobj);
(*env)->SetIntField(env, resp, tableVgIdFieldCache.codeField, JNI_CONNECTION_NULL);
return resp;
}

const char *db = NULL;
const char *table = NULL;
int vgID = 0;

if (jdb != NULL) {
db = (*env)->GetStringUTFChars(env, jdb, NULL);
}
if (jtable != NULL) {
table = (*env)->GetStringUTFChars(env, jtable, NULL);
}

int code = taos_get_table_vgId(taos, db, table, &vgID);
if (db != NULL) {
(*env)->ReleaseStringUTFChars(env, jdb, db);
}
if (table != NULL) {
(*env)->ReleaseStringUTFChars(env, jtable, table);
}

(*env)->SetIntField(env, resp, tableVgIdFieldCache.codeField, code);
(*env)->SetIntField(env, resp, tableVgIdFieldCache.vgIDField, vgID);
return resp;
}