private void writeInstrument(final Instrument instrument, final Writer writer)
throws IOException {
final StringBuilder attrs = new StringBuilder();
appendAttr(attrs, "name", instrument.getName());
appendAttr(attrs, "value", instrument.getValue());
getOtherAttrs(attrs, instrument);
writer.write("{\"instrument\":{");
writer.write(attrs.toString());
writer.write("}");
}
private void getOtherAttrs(final StringBuilder attrs, final Instrument instrument) {
if (instrument instanceof OpInstrument) {
appendAttr(attrs, "type", "opInstrument");
OpInstrument opInstrument = (OpInstrument) instrument;
appendAttr(attrs, "count", opInstrument.getInvocationCount());
appendAttr(attrs, "time", opInstrument.getMillisecondsTaken());
appendAttr(attrs, "size", opInstrument.getResultSetSize());
appendAttr(attrs, "cpu", opInstrument.getCpuTime());
} else if (instrument instanceof CacheInstrument) {
appendAttr(attrs, "type", "cacheInstrument");
CacheInstrument cacheInstrument = (CacheInstrument) instrument;
appendAttr(attrs, "misses", cacheInstrument.getMisses());
appendAttr(attrs, "missTime", cacheInstrument.getMissTime());
appendAttr(attrs, "hits", cacheInstrument.getHits());
appendAttr(attrs, "size", cacheInstrument.getCacheSize());
appendAttr(attrs, "hitMissRatio", String.valueOf(cacheInstrument.getHitMissRatio()));
} else if (instrument instanceof AbsoluteCounter) {
appendAttr(attrs, "type", "absoluteCounter");
} else if (instrument instanceof DerivedCounter) {
appendAttr(attrs, "type", "derivedCounter");
} else if (instrument instanceof Counter) {
appendAttr(attrs, "type", "counter");
} else if (instrument instanceof Gauge) {
appendAttr(attrs, "type", "gauge");
} else {
appendAttr(attrs, "type", instrument.getClass().getName());
}
}