python实现dds服务
时间: 2023-06-13 13:06:03 浏览: 363
DDS(Data Distribution Service)是一种用于数据传输和通信的中间件协议,它可以在分布式系统中实现高效的数据传输和通信。在Python中,可以使用OpenDDS库来实现DDS服务。
以下是Python实现DDS服务的基本步骤:
1. 下载和安装OpenDDS库,并配置环境变量。
2. 创建IDL文件,定义数据类型和接口。例如:
```
module MyModule {
struct MyData {
long id;
string name;
};
interface MyInterface {
void sendData(in MyData data);
};
};
```
3. 使用命令行工具生成Python代码。例如:
```
$ cd <path-to-idl-file>
$ $DDS_ROOT/bin/idlpp -l python MyModule.idl
```
4. 编写Python代码实现接口和数据类型。例如:
```python
from mymodule_idl import MyData, MyInterface
from OpenDDS import DCPS
class MyInterface_i(DCPS.DataWriterRemote):
def sendData(self, data):
print("Received data: id={}, name={}".format(data.id, data.name))
participant = DCPS.DomainParticipantFactory.get_instance().create_participant(4, OpenDDS.DCPS.DEFAULT_DOMAIN_ID_DEFAULT, OpenDDS.DCPS.TheParticipantFactory.get_instance().get_qos())
topic_qos = OpenDDS.DCPS.TopicQos()
participant.get_default_topic_qos(topic_qos)
topic = participant.create_topic("MyTopic", "MyModule::MyData", topic_qos)
publisher_qos = OpenDDS.DCPS.PublisherQos()
participant.get_default_publisher_qos(publisher_qos)
publisher = participant.create_publisher(publisher_qos)
data_writer_qos = OpenDDS.DCPS.DataWriterQos()
publisher.get_default_datawriter_qos(data_writer_qos)
data_writer = publisher.create_datawriter(topic, data_writer_qos)
my_interface = MyInterface_i()
data_writer.set_listener(my_interface, OpenDDS.DCPS.DataWriterListener.NEW_INSTANCE)
for i in range(1, 10):
data = MyData()
data.id = i
data.name = "Data{}".format(i)
data_writer.write(data, None)
```
5. 运行Python代码,启动DDS服务。例如:
```
$ python myinterface.py
```
这样就可以通过DDS协议在Python中实现数据传输和通信了。
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