/**
* @param agent for which all available metrics will be retrieved. Attention, this does NOT
* retrieve metric VALUES
*/
private void updateMetricsForJCatascopiaAgent(JCatascopiaAgent agent) {
URL url = null;
HttpURLConnection connection = null;
try {
url = new URL(this.url + "/agents/" + agent.getId() + "/availableMetrics");
connection = (HttpURLConnection) url.openConnection();
connection.setRequestMethod("GET");
connection.setRequestProperty("Content-Type", "application/json");
connection.setRequestProperty("Accept", "application/json");
InputStream errorStream = connection.getErrorStream();
if (errorStream != null) {
BufferedReader reader = new BufferedReader(new InputStreamReader(errorStream));
String line;
while ((line = reader.readLine()) != null) {
Logger.getLogger(JCatascopiaDataSource.class.getName()).log(Level.SEVERE, line);
}
}
InputStream inputStream = connection.getInputStream();
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream));
String availableMetrics = "";
String line = "";
while ((line = bufferedReader.readLine()) != null) {
availableMetrics += line;
}
JSONObject object = new JSONObject(availableMetrics);
if (object.has("metrics")) {
JSONArray metrics = object.getJSONArray("metrics");
List<JCatascopiaMetric> agentMetrics = agent.getAgentMetrics();
// reuse JCatascopia metric obejcts, to avoid creating new objects all the time
int nrOfMetricsReportedByJCatascopia = metrics.length();
int nrOfMetricsInAgent = agentMetrics.size();
int sizeDifference = nrOfMetricsInAgent - nrOfMetricsReportedByJCatascopia;
// resize agents metrics list
if (sizeDifference < 0) {
// inchrease agents pool
for (int i = sizeDifference; i < 0; i++) {
agentMetrics.add(new JCatascopiaMetric());
}
} else if (sizeDifference > 0) {
for (int i = sizeDifference; i > 0; i--) {
agentMetrics.remove(0);
}
}
// populate the metrics pool
for (int i = 0; i < metrics.length(); i++) {
JSONObject metric = metrics.getJSONObject(i);
JCatascopiaMetric jCatascopiaMetric = agentMetrics.get(i);
// get agent metricID
if (metric.has("metricID")) {
jCatascopiaMetric.setId(metric.getString("metricID"));
} else {
Logger.getLogger(JCatascopiaDataSource.class.getName())
.log(Level.SEVERE, "JCatascopia metricID not found in {0}", availableMetrics);
}
// get agent name
if (metric.has("name")) {
jCatascopiaMetric.setName(metric.getString("name"));
} else {
Logger.getLogger(JCatascopiaDataSource.class.getName())
.log(Level.SEVERE, "JCatascopia name not found in {0}", availableMetrics);
}
// get agent units
if (metric.has("units")) {
jCatascopiaMetric.setUnit(metric.getString("units"));
} else {
Logger.getLogger(JCatascopiaDataSource.class.getName())
.log(Level.SEVERE, "JCatascopia units not found in {0}", availableMetrics);
}
// get agent type
if (metric.has("type")) {
jCatascopiaMetric.setType(metric.getString("type"));
} else {
Logger.getLogger(JCatascopiaDataSource.class.getName())
.log(Level.SEVERE, "JCatascopia type not found in {0}", availableMetrics);
}
// get agent group
if (metric.has("group")) {
jCatascopiaMetric.setGroup(metric.getString("group"));
} else {
Logger.getLogger(JCatascopiaDataSource.class.getName())
.log(Level.SEVERE, "JCatascopia group not found in {0}", availableMetrics);
}
}
} else {
Logger.getLogger(JCatascopiaDataSource.class.getName())
.log(Level.SEVERE, "No JCatascopia metrics found in {0}", availableMetrics);
}
} catch (Exception e) {
Logger.getLogger(JCatascopiaDataSource.class.getName()).log(Level.SEVERE, e.getMessage(), e);
} finally {
if (connection != null) {
connection.disconnect();
}
}
}
