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hystrix-servo-metrics-publisher
/**
* Copyright 2012 Netflix, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.netflix.hystrix.contrib.servopublisher;
import com.netflix.hystrix.HystrixEventType;
import com.netflix.hystrix.HystrixThreadPoolKey;
import com.netflix.hystrix.HystrixThreadPoolMetrics;
import com.netflix.hystrix.HystrixThreadPoolProperties;
import com.netflix.hystrix.metric.consumer.CumulativeThreadPoolEventCounterStream;
import com.netflix.hystrix.metric.consumer.RollingThreadPoolMaxConcurrencyStream;
import com.netflix.hystrix.metric.consumer.RollingThreadPoolEventCounterStream;
import com.netflix.hystrix.strategy.metrics.HystrixMetricsPublisherThreadPool;
import com.netflix.servo.DefaultMonitorRegistry;
import com.netflix.servo.annotations.DataSourceLevel;
import com.netflix.servo.monitor.BasicCompositeMonitor;
import com.netflix.servo.monitor.Monitor;
import com.netflix.servo.monitor.MonitorConfig;
import com.netflix.servo.tag.Tag;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import rx.functions.Func0;
import java.util.ArrayList;
import java.util.List;
/**
* Implementation of {@link HystrixMetricsPublisherThreadPool} using Servo (https://github.com/Netflix/servo)
*/
public class HystrixServoMetricsPublisherThreadPool extends HystrixServoMetricsPublisherAbstract implements HystrixMetricsPublisherThreadPool {
private static final Logger logger = LoggerFactory.getLogger(HystrixServoMetricsPublisherThreadPool.class);
private final HystrixThreadPoolKey key;
private final HystrixThreadPoolMetrics metrics;
private final HystrixThreadPoolProperties properties;
private final Tag servoInstanceTag;
private final Tag servoTypeTag;
public HystrixServoMetricsPublisherThreadPool(HystrixThreadPoolKey threadPoolKey, HystrixThreadPoolMetrics metrics, HystrixThreadPoolProperties properties) {
this.key = threadPoolKey;
this.metrics = metrics;
this.properties = properties;
this.servoInstanceTag = new Tag() {
@Override
public String getKey() {
return "instance";
}
@Override
public String getValue() {
return key.name();
}
@Override
public String tagString() {
return key.name();
}
};
this.servoTypeTag = new Tag() {
@Override
public String getKey() {
return "type";
}
@Override
public String getValue() {
return "HystrixThreadPool";
}
@Override
public String tagString() {
return "HystrixThreadPool";
}
};
}
@Override
public void initialize() {
/* list of monitors */
List> monitors = getServoMonitors();
// publish metrics together under a single composite (it seems this name is ignored)
MonitorConfig commandMetricsConfig = MonitorConfig.builder("HystrixThreadPool_" + key.name()).build();
BasicCompositeMonitor commandMetricsMonitor = new BasicCompositeMonitor(commandMetricsConfig, monitors);
DefaultMonitorRegistry.getInstance().register(commandMetricsMonitor);
RollingThreadPoolEventCounterStream.getInstance(key, properties).startCachingStreamValuesIfUnstarted();
CumulativeThreadPoolEventCounterStream.getInstance(key, properties).startCachingStreamValuesIfUnstarted();
RollingThreadPoolMaxConcurrencyStream.getInstance(key, properties).startCachingStreamValuesIfUnstarted();
}
@Override
protected Tag getServoTypeTag() {
return servoTypeTag;
}
@Override
protected Tag getServoInstanceTag() {
return servoInstanceTag;
}
protected Monitor safelyGetCumulativeMonitor(final String name, final Func0 eventThunk) {
return new CounterMetric(MonitorConfig.builder(name).withTag(getServoTypeTag()).withTag(getServoInstanceTag()).build()) {
@Override
public Long getValue() {
try {
return metrics.getCumulativeCount(eventThunk.call());
} catch (NoSuchFieldError error) {
logger.error("While publishing Servo metrics, error looking up eventType for : {}. Please check that all Hystrix versions are the same!", name);
return 0L;
}
}
};
}
protected Monitor safelyGetRollingMonitor(final String name, final Func0 eventThunk) {
return new GaugeMetric(MonitorConfig.builder(name).withTag(DataSourceLevel.DEBUG).withTag(getServoTypeTag()).withTag(getServoInstanceTag()).build()) {
@Override
public Long getValue() {
try {
return metrics.getRollingCount(eventThunk.call());
} catch (NoSuchFieldError error) {
logger.error("While publishing Servo metrics, error looking up eventType for : {}. Please check that all Hystrix versions are the same!", name);
return 0L;
}
}
};
}
/**
* Servo will flatten metric names as: getServoTypeTag()_getServoInstanceTag()_monitorName
*
* An implementation note. If there's a version mismatch between hystrix-core and hystrix-servo-metric-publisher,
* the code below may reference a HystrixEventType.ThreadPool that does not exist in hystrix-core. If this happens,
* a j.l.NoSuchFieldError occurs. Since this data is not being generated by hystrix-core, it's safe to count it as 0
* and we should log an error to get users to update their dependency set.
*/
private List> getServoMonitors() {
List> monitors = new ArrayList>();
monitors.add(new InformationalMetric(MonitorConfig.builder("name").build()) {
@Override
public String getValue() {
return key.name();
}
});
// allow Servo and monitor to know exactly at what point in time these stats are for so they can be plotted accurately
monitors.add(new GaugeMetric(MonitorConfig.builder("currentTime").withTag(DataSourceLevel.DEBUG).build()) {
@Override
public Number getValue() {
return System.currentTimeMillis();
}
});
monitors.add(new GaugeMetric(MonitorConfig.builder("threadActiveCount").build()) {
@Override
public Number getValue() {
return metrics.getCurrentActiveCount();
}
});
monitors.add(new GaugeMetric(MonitorConfig.builder("completedTaskCount").build()) {
@Override
public Number getValue() {
return metrics.getCurrentCompletedTaskCount();
}
});
monitors.add(new GaugeMetric(MonitorConfig.builder("largestPoolSize").build()) {
@Override
public Number getValue() {
return metrics.getCurrentLargestPoolSize();
}
});
monitors.add(new GaugeMetric(MonitorConfig.builder("totalTaskCount").build()) {
@Override
public Number getValue() {
return metrics.getCurrentTaskCount();
}
});
monitors.add(new GaugeMetric(MonitorConfig.builder("queueSize").build()) {
@Override
public Number getValue() {
return metrics.getCurrentQueueSize();
}
});
monitors.add(new GaugeMetric(MonitorConfig.builder("rollingMaxActiveThreads").withTag(DataSourceLevel.DEBUG).build()) {
@Override
public Number getValue() {
return metrics.getRollingMaxActiveThreads();
}
});
//thread pool event monitors
monitors.add(safelyGetCumulativeMonitor("countThreadsExecuted", new Func0() {
@Override
public HystrixEventType.ThreadPool call() {
return HystrixEventType.ThreadPool.EXECUTED;
}
}));
monitors.add(safelyGetCumulativeMonitor("countThreadsRejected", new Func0() {
@Override
public HystrixEventType.ThreadPool call() {
return HystrixEventType.ThreadPool.REJECTED;
}
}));
monitors.add(safelyGetRollingMonitor("rollingCountThreadsExecuted", new Func0() {
@Override
public HystrixEventType.ThreadPool call() {
return HystrixEventType.ThreadPool.EXECUTED;
}
}));
monitors.add(safelyGetRollingMonitor("rollingCountCommandsRejected", new Func0() {
@Override
public HystrixEventType.ThreadPool call() {
return HystrixEventType.ThreadPool.REJECTED;
}
}));
// properties
monitors.add(new InformationalMetric(MonitorConfig.builder("propertyValue_corePoolSize").build()) {
@Override
public Number getValue() {
return properties.coreSize().get();
}
});
monitors.add(new InformationalMetric(MonitorConfig.builder("propertyValue_keepAliveTimeInMinutes").build()) {
@Override
public Number getValue() {
return properties.keepAliveTimeMinutes().get();
}
});
monitors.add(new InformationalMetric(MonitorConfig.builder("propertyValue_queueSizeRejectionThreshold").build()) {
@Override
public Number getValue() {
return properties.queueSizeRejectionThreshold().get();
}
});
monitors.add(new InformationalMetric(MonitorConfig.builder("propertyValue_maxQueueSize").build()) {
@Override
public Number getValue() {
return properties.maxQueueSize().get();
}
});
return monitors;
}
}
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