public MetricValue getValue(Metric metric)
throws PluginException, MetricNotFoundException, MetricUnreachableException {
AgentDaemon agent;
if ((agent = AgentDaemon.getMainInstance()) == null) {
throw new PluginException(
"Agent.getValue() called " + "when plugin not running " + "from within the Agent");
}
if (metric.toString().equals(AVAIL_TMPL)) {
return new MetricValue(Metric.AVAIL_UP);
}
if (metric.getDomainName().equals("camAgent")) {
return this.getAgentValue(agent, metric);
} else if (metric.getDomainName().equals("sigar")) {
return this.getSigarValue(metric);
} else {
throw new MetricInvalidException("Invalid JMX domain '" + metric.getDomainName() + "'");
}
}
private MetricValue getAgentValue(AgentDaemon agent, Metric metric) throws PluginException {
AgentMonitorValue mVal;
String monitorName, monitorVal;
monitorName = metric.getObjectProperty("Monitor");
monitorVal = metric.getAttributeName();
if (monitorName == null || monitorVal == null) {
throw new MetricInvalidException(
"Metric invalid -- no Monitor " + "key, or no attribute: " + metric);
}
mVal = agent.getMonitorValues(monitorName, new String[] {monitorVal})[0];
if (mVal.isErr()) {
switch (mVal.getErrCode()) {
case AgentMonitorValue.ERR_INCALCULABLE:
getLog().debug("Unable to calculate " + metric);
return new MetricValue(Double.NaN);
case AgentMonitorValue.ERR_BADKEY:
throw new MetricInvalidException(
"Agent monitor '" + monitorName + "' does not have " + "a " + monitorVal + " value");
case AgentMonitorValue.ERR_BADMONITOR:
throw new MetricInvalidException("Agent monitor '" + monitorName + "' unknown");
case AgentMonitorValue.ERR_INTERNAL:
default:
throw new PluginException(
"Internal error fetching" + " '" + monitorName + ":" + monitorVal + "'");
}
} else {
if (mVal.getType() != AgentMonitorValue.TYPE_DOUBLE) {
throw new MetricInvalidException(
"Agent Metric '" + metric + "' " + "does not return a double");
}
return new MetricValue(mVal.getDoubleValue());
}
}