我正在查看 Excel 的 RTI DDS 加载项,我正在尝试重写它随附的 Hello_simple HelloPublisher.java 示例以发布字符串,并让 Excel 将其拾取。除了显示我输入的字符串的值之外,一切正常。(它获取消息发送的时间,所有其他元数据都很好)
我的代码看起来像这样:
public class Publish {
public static void main(final String[] args){
// Create the DDS Domain participant on domain ID 123
final DomainParticipant participant = DomainParticipantFactory.get_instance().create_participant(
123, //Domain ID
DomainParticipantFactory.PARTICIPANT_QOS_DEFAULT,
null, // Listener
StatusKind.STATUS_MASK_NONE);
if (participant == null) {
System.err.println("Unable to create domain participant");
return;
}
// Create the topic "Message" for the String type
final Topic topic = participant.create_topic(
"Message",
StringTypeSupport.get_type_name(),
DomainParticipant.TOPIC_QOS_DEFAULT,
null, // listener
StatusKind.STATUS_MASK_NONE);
if (topic == null) {
System.err.println("Unable to create topic.");
return;
}
// Create the data writer using the default publisher
final StringDataWriter dataWriter =
(StringDataWriter) participant.create_datawriter(
topic,
Publisher.DATAWRITER_QOS_DEFAULT,
null, // listener
StatusKind.STATUS_MASK_NONE);
if (dataWriter == null) {
System.err.println("Unable to create data writer\n");
return;
}
System.out.println("Ready to write data.");
System.out.println("When the subscriber is ready, you can start writing.");
System.out.print("Press CTRL+C to terminate or enter an empty line to do a clean shutdown.\n\n");
final BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
try {
while (true) {
System.out.print("Please type a message> ");
final String value = reader.readLine();
if (value == null) {break;}
dataWriter.write(value, InstanceHandle_t.HANDLE_NIL);
if (value.equals("")) { break; }
}
} catch (final IOException e) {e.printStackTrace();
} catch (final RETCODE_ERROR e) {e.printStackTrace();}
System.out.println("Exiting...");
participant.delete_contained_entities();
DomainParticipantFactory.get_instance().delete_participant(participant);
}
}
我在 Excel 中显示值的调用是
=RTD("dds2excel.connect",,"TYPE:DDS::String","TYPENAME:DDS::String","TOPIC:Message","FIELD:value")
(由 RTI 插件自动生成)我对 RTI 和 DDS 还不是很熟悉,但我感觉 Excel 不想获取这些数据的实际内容,因为它认为它不属于给它?因此,为什么它只承认它正在收听的域的元数据。
任何指针将不胜感激。