@Override
public void run() {
try {
for (HystrixCommandMetrics commandMetrics : HystrixCommandMetrics.getInstances()) {
String jsonString = getCommandJson(commandMetrics);
listener.handleJsonMetric(jsonString);
}
for (HystrixThreadPoolMetrics threadPoolMetrics : HystrixThreadPoolMetrics.getInstances()) {
if (hasExecutedCommandsOnThread(threadPoolMetrics)) {
String jsonString = getThreadPoolJson(threadPoolMetrics);
listener.handleJsonMetric(jsonString);
}
}
for (HystrixCollapserMetrics collapserMetrics : HystrixCollapserMetrics.getInstances()) {
String jsonString = getCollapserJson(collapserMetrics);
listener.handleJsonMetric(jsonString);
}
} catch (Exception e) {
logger.warn("Failed to output metrics as JSON", e);
// shutdown
pause();
return;
}
}
private String getCollapserJson(final HystrixCollapserMetrics collapserMetrics)
throws IOException {
HystrixCollapserKey key = collapserMetrics.getCollapserKey();
StringWriter jsonString = new StringWriter();
JsonGenerator json = jsonFactory.createJsonGenerator(jsonString);
json.writeStartObject();
json.writeStringField("type", "HystrixCollapser");
json.writeStringField("name", key.name());
json.writeNumberField("currentTime", System.currentTimeMillis());
safelyWriteNumberField(
json,
"rollingCountRequestsBatched",
new Func0<Long>() {
@Override
public Long call() {
return collapserMetrics.getRollingCount(HystrixEventType.Collapser.ADDED_TO_BATCH);
}
});
safelyWriteNumberField(
json,
"rollingCountBatches",
new Func0<Long>() {
@Override
public Long call() {
return collapserMetrics.getRollingCount(HystrixEventType.Collapser.BATCH_EXECUTED);
}
});
safelyWriteNumberField(
json,
"rollingCountResponsesFromCache",
new Func0<Long>() {
@Override
public Long call() {
return collapserMetrics.getRollingCount(
HystrixEventType.Collapser.RESPONSE_FROM_CACHE);
}
});
// batch size percentiles
json.writeNumberField("batchSize_mean", collapserMetrics.getBatchSizeMean());
json.writeObjectFieldStart("batchSize");
json.writeNumberField("25", collapserMetrics.getBatchSizePercentile(25));
json.writeNumberField("50", collapserMetrics.getBatchSizePercentile(50));
json.writeNumberField("75", collapserMetrics.getBatchSizePercentile(75));
json.writeNumberField("90", collapserMetrics.getBatchSizePercentile(90));
json.writeNumberField("95", collapserMetrics.getBatchSizePercentile(95));
json.writeNumberField("99", collapserMetrics.getBatchSizePercentile(99));
json.writeNumberField("99.5", collapserMetrics.getBatchSizePercentile(99.5));
json.writeNumberField("100", collapserMetrics.getBatchSizePercentile(100));
json.writeEndObject();
// shard size percentiles (commented-out for now)
// json.writeNumberField("shardSize_mean", collapserMetrics.getShardSizeMean());
// json.writeObjectFieldStart("shardSize");
// json.writeNumberField("25", collapserMetrics.getShardSizePercentile(25));
// json.writeNumberField("50", collapserMetrics.getShardSizePercentile(50));
// json.writeNumberField("75", collapserMetrics.getShardSizePercentile(75));
// json.writeNumberField("90", collapserMetrics.getShardSizePercentile(90));
// json.writeNumberField("95", collapserMetrics.getShardSizePercentile(95));
// json.writeNumberField("99", collapserMetrics.getShardSizePercentile(99));
// json.writeNumberField("99.5", collapserMetrics.getShardSizePercentile(99.5));
// json.writeNumberField("100", collapserMetrics.getShardSizePercentile(100));
// json.writeEndObject();
// json.writeNumberField("propertyValue_metricsRollingStatisticalWindowInMilliseconds",
// collapserMetrics.getProperties().metricsRollingStatisticalWindowInMilliseconds().get());
json.writeBooleanField(
"propertyValue_requestCacheEnabled",
collapserMetrics.getProperties().requestCacheEnabled().get());
json.writeNumberField(
"propertyValue_maxRequestsInBatch",
collapserMetrics.getProperties().maxRequestsInBatch().get());
json.writeNumberField(
"propertyValue_timerDelayInMilliseconds",
collapserMetrics.getProperties().timerDelayInMilliseconds().get());
json.writeNumberField(
"reportingHosts", 1); // this will get summed across all instances in a cluster
json.writeEndObject();
json.close();
return jsonString.getBuffer().toString();
}
