我在自动化提取管道方面遇到问题。我正在从kepware服务器读取所有标签，并使用nifi吸收它们。我正在使用opcua客户端来查看是否有一个已添加到kepware服务器的标签，并且还获取了该标签的描述和地址。但是这种方式太慢了，并使kepware服务器停止工作。
是否有任何方法可以检测kepware服务器中添加的标签和属性（地址，说明），而无需使用每10秒从服务器读取一次的轮询方法？
我正在使用以下内容，但效率不高，因为我们从kepware读取多达200000个标签：/
from opcua import Client, ua
from opcua.ua import status_codes
from threading import Thread
import threading
import logging
import time
import csv
import re
NUM_SUBSCRIPTIONS = 10
output_files_name_machines_tags = []
for i in range(NUM_SUBSCRIPTIONS):
output_file = "../resources/machine_tags_"+str(i)+".txt"
output_files_name_machines_tags.append(output_file)
output_file_name_special_tags = "../resources/advanced_Tags.txt"
tags_description = '../resources/tags_description.csv'
special_tag = "ns=2;s=_AdvancedTags"
Infos = ['Address','Description']
#logging.basicConfig(level=logging.WARN)
client = Client("opc.tcp://10.129.140.215:49320/",timeout=3600000)
class Industrial_Tags_Updater():
list_machine_tags_changed = [False]*NUM_SUBSCRIPTIONS
list_special_tags_changed = False
list_machine_tags = [[] for i in range(NUM_SUBSCRIPTIONS)]
list_special_tags = []
output_description_tags = []
output_description_tags_changed = False
distribute_integer = 0
nodes_to_be_described = []
def process_tag_nodes(self, node_child_level_1):
nodes_children_level_2 = node_child_level_1.get_children()
#print(nodes_children_level_2)
for node_child_level_2 in nodes_children_level_2:
if not "._" in get_node_string(node_child_level_2):
#print(node_child_level_2)
nodes_children_level_3 = node_child_level_2.get_children()
for node_child_level_3 in nodes_children_level_3:
tag_name = get_node_string(node_child_level_3)
if special_tag in tag_name:
nodes_children_level_4 = node_child_level_3.get_children()
for node_child_level_4 in nodes_children_level_4:
#print(get_node_string(node_child_level_4))
if not get_node_string(node_child_level_4) in self.list_special_tags:
self.list_special_tags_changed = True
self.list_special_tags.append(get_node_string(node_child_level_4))
self.output_description_tags.append([get_node_string(node_child_level_4)])
elif not "._" in tag_name:
if not any(tag_name in list for list in self.list_machine_tags):
for info in Infos:
self.nodes_to_be_described.append(tag_name+"._"+info)
params = ua.ReadParameters()
if self.nodes_to_be_described:
for node_id_str in self.nodes_to_be_described:
nodeid = ua.NodeId.from_string(node_id_str)
attr = ua.ReadValueId()
attr.NodeId = nodeid
attr.AttributeId = ua.AttributeIds.Value
params.NodesToRead.append(attr)
results = client.uaclient.read(params)
for i in range(0,len(results),len(Infos)):
tag_str = params.NodesToRead[i].NodeId.to_string().replace('._'+Infos[0],'')
if results[i].StatusCode.name != 'BadNodeIdUnknown':
tag_description = []
tag_description.append(tag_str)
for j in range(len(Infos)):
tag_description.append(results[i+j].Value.Value)
if tag_description not in self.output_description_tags:
self.output_description_tags.append(tag_description)
self.output_description_tags_changed = True
#print(tag_description)
if not any(tag_str in list for list in self.list_machine_tags):
self.list_machine_tags[int(self.distribute_integer/10)%NUM_SUBSCRIPTIONS].append(tag_str)
self.list_machine_tags_changed[int(self.distribute_integer/10)%NUM_SUBSCRIPTIONS] = True
self.distribute_integer += 1
else :
node_child_level_3 = client.get_node(tag_str)
nodes_children_level_4 = node_child_level_3.get_children()
for node_child_level_4 in nodes_children_level_4:
node_string = get_node_string(node_child_level_4)
if not any(node_string in list for list in self.list_machine_tags):
self.list_machine_tags[int(self.distribute_integer/10)%NUM_SUBSCRIPTIONS].append(node_string)
self.list_machine_tags_changed[int(self.distribute_integer/10)%NUM_SUBSCRIPTIONS] = True
self.output_description_tags.append([node_string])
self.distribute_integer += 1
#Write the list of tags to be consumed by nifi processor
def write_machine_tags_file(self, file, num_subscription):
output_file = open(file, "w")
output_file.write("\n".join(self.list_machine_tags[num_subscription]))
output_file.close()
print("List machine tags file updated pour la soubscription"+str(num_subscription))
#Write the list of tags to be consumed by nifi processor
def write_special_tags_file(self, ):
output_file = open(output_file_name_special_tags, "w")
output_file.write("\n".join(self.list_special_tags))
output_file.close()
print("List special tags file updated")
def write_description_file(self, ):
#write to a csv file the description of the tags
infos_data = self.output_description_tags
for i in range(len(infos_data)):
infos_data[i] = (infos_data[i] + (len(Infos)+1) * [""])[:len(Infos)+1]
fieldnames = ["Tag_name"]
fieldnames.extend(Infos)
infos_data.insert(0,fieldnames)
with open(tags_description, 'w') as csvFile:
writer = csv.writer(csvFile)
writer.writerows(infos_data)
print("Description tags file updated")
csvFile.close()
def reset_update_description_change(self, ):
self.output_description_tags_changed = False
self.output_description_tags = []
def reset_update_machine_change(self, ):
self.list_machine_tags_changed = [False]*NUM_SUBSCRIPTIONS
def reset_update_special_change(self, ):
self.list_special_tags_changed = False
if __name__ == "__main__":
def get_node_string(node):
return node.nodeid.to_string()
try:
client.connect()
objects = client.get_objects_node()
nodes_children_level_1 = objects.get_children()
#print(nodes_children_level_1)
nodes_level_1_filtred = []
nodes_level_1_filtred.append(client.get_node(special_tag))
for node_child_level_1 in nodes_children_level_1:
pattern = r'ns=2;s=[^_]'
if re.match(pattern, get_node_string(node_child_level_1)):
nodes_level_1_filtred.append(node_child_level_1)
tags_updater = Industrial_Tags_Updater()
#print(nodes_level_1_filtred)
while True:
#Creation of threads
threads_list = []
for node_child_level_1 in nodes_level_1_filtred:
threads_list.append(Thread(target=tags_updater.process_tag_nodes, args=(node_child_level_1, )))
#launching threads
for thread in threads_list:
thread.start()
#waiting the threds to be finished
for thread in threads_list:
thread.join()
#print("finished")
if tags_updater.list_special_tags_changed or True in tags_updater.list_machine_tags_changed or tags_updater.output_description_tags_changed:
tags_updater.write_description_file()
tags_updater.reset_update_description_change()
for i in range(NUM_SUBSCRIPTIONS):
if tags_updater.list_machine_tags_changed[i]:
tags_updater.write_machine_tags_file(output_files_name_machines_tags[i], i)
tags_updater.reset_update_machine_change()
if tags_updater.list_special_tags_changed:
tags_updater.write_special_tags_file()
tags_updater.reset_update_special_change()
#Schedule the the threads to run evry minutes
time.sleep(10)
finally:
client.disconnect()
我们能否在kepware中添加事件以告知客户端已添加标签，或使用kepware API在人们在此API中添加标签的地方？我不知道是否有解决此问题的方法，请帮忙！
我在Google上寻找您的问题时发现了您的问题。您终于找到解决方案了吗？我有1000多个标签，但无法使用nifi以1秒的轮询速率读取它们。