How to properly configure a diagnostics analyzer plugin in ROS [closed]

asked 2016-02-15 04:47:06 -0500

juls gravatar image

updated 2016-02-15 04:58:33 -0500

ahendrix gravatar image

Hello to everyone, i am new to ROS and i have the following problem:

I want to create an Analyzer plugin so as to process messages posted in the /diagnostics topic.

The Analyzer class has been implemented exactly as it is described in the . Inside the ROS package home folder the plugin.xml(sample_analyzer_plugin.xml in my case) file it is defined as follows:

<library path="lib/libsample_analyzer"><class name="SampleAnalyzer" type="diagnostic_aggregator::SampleAnalyzer" base_class_type="diagnostic_aggregator::Analyzer"><description>
      SampleAnalyzer is tutorial for writing diagnostic analyzers.

where myrmex_safety_reporter the ROS package name. And is exported in the package.xml as follows:

<export><!-- Other tools can request additional information be placed here 
--><diagnostic_aggregator plugin="${prefix}/sample_analyzer_plugin.xml"/></export>

In the package's CMakeLists.txt catkin dependencies to diagnostic_aggregator, diagnostic_msgs, pluginlib and the following are added:

add_library(sample_analyzer src/sample_analyzer.cpp ${ANALYZER_HEADERS})
target_link_libraries(sample_analyzer ${catkin_LIBRARIES})


And after the build the is properly created.

I have implemented a publisher in python exactly as it is described in the ROS paradigm, and it works fine. I have created the following launch file, called base.launch so as to load my plugin to the diagnostics_aggregator:

      <node pkg="diagnostic_aggregator" type="aggregator_node" name="diagnostic_aggregator">
        <rosparam command="load" file="$(find myrmex_safety_reporter)/param/sample_analyzer_load.yaml"/>

the sample_analyzer_load.yaml is defined as follows (exactly like the ROS example):

pub_rate: 1.0 # Optional, defaults to 1.0
    type: SampleAnalyzer
    power_board_name: Power board 1000

I have overriden the Analyzer's report method so as to return only specific fields of the message and not the entire message in the /diagnostics_agg as follows:

vector<boost::shared_ptr<diagnostic_msgs::DiagnosticStatus> > SampleAnalyzer::report()
  boost::shared_ptr<diagnostic_msgs::DiagnosticStatus> eth_stat = eth_master_item_->toStatusMsg(path_);
    ROS_INFO("Overrided Analyzer report function");
  // If we have power data, and runstop is hit, we'll suppress errors
  if (has_eth_data_ && has_power_data_ && runstop_hit_)
    eth_stat->level = diagnostic_msgs::DiagnosticStatus::OK;

  vector<boost::shared_ptr<diagnostic_msgs::DiagnosticStatus> > output;
  boost::shared_ptr<diagnostic_msgs::DiagnosticStatus> processed_msg (new diagnostic_msgs::DiagnosticStatus);
  return output;

Now after launching the diagnostic aggregator with:

roslaunch myrmex_safety_reporter base.launch

I see that in the diagnostics_agg topic the entire messages are published, instead of specific fields that i defined in the Analyzer report method.

This means that the Analyzer's report method is not overriden or that my SampleAnalyzer is not loaded!!! How can i load my own analyzer in the diagnostic_aggregator??? Any suggestions it would be useful!!! Thank you in Advance.

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Closed for the following reason question is not relevant or outdated by tfoote
close date 2017-12-05 16:50:19.293789


Is your match() function being called? Does it return true for the status item you're interested in?

ahendrix gravatar image ahendrix  ( 2016-02-15 05:01:40 -0500 )edit