/*
* The MIT License (MIT)
* Copyright © 2013 Englishtown <opensource@englishtown.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the “Software”), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package com.englishtown.vertx.metrics;
import com.codahale.metrics.Gauge;
import com.codahale.metrics.MetricRegistry;
import io.netty.util.concurrent.EventExecutor;
import io.netty.util.concurrent.SingleThreadEventExecutor;
import org.vertx.java.core.Vertx;
import org.vertx.java.core.impl.VertxInternal;
import org.vertx.java.platform.Container;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.ThreadPoolExecutor;
import static com.codahale.metrics.MetricRegistry.name;
/**
* Provides gauges for vert.x background pool worker threads
*/
public class VertxBackgroundPoolGauges {
public VertxBackgroundPoolGauges(Vertx vertx, Container container, MetricRegistry registry) {
register(vertx, container, registry);
}
protected void register(Vertx vertx, Container container, MetricRegistry registry) {
if (vertx instanceof VertxInternal) {
VertxInternal vertxInternal = (VertxInternal) vertx;
ExecutorService executorService = vertxInternal.getBackgroundPool();
if (executorService instanceof ThreadPoolExecutor) {
final ThreadPoolExecutor executor = (ThreadPoolExecutor) executorService;
try {
registry.register(
name(Utils.DEFAULT_METRIC_PREFIX, this.getClass().getSimpleName(), "queue", "size"),
new Gauge<Integer>() {
@Override
public Integer getValue() {
return executor.getQueue().size();
}
});
} catch (IllegalArgumentException e) {
// Assume this is due to multiple instances
}
try {
registry.register(
name(Utils.DEFAULT_METRIC_PREFIX, this.getClass().getSimpleName(), "size"),
new Gauge<Integer>() {
@Override
public Integer getValue() {
return executor.getPoolSize();
}
});
} catch (IllegalArgumentException e) {
// Assume this is due to multiple instances
}
try {
registry.register(
name(Utils.DEFAULT_METRIC_PREFIX, this.getClass().getSimpleName(), "core", "size"),
new Gauge<Integer>() {
@Override
public Integer getValue() {
return executor.getCorePoolSize();
}
});
} catch (IllegalArgumentException e) {
// Assume this is due to multiple instances
}
try {
registry.register(
name(Utils.DEFAULT_METRIC_PREFIX, this.getClass().getSimpleName(), "max", "size"),
new Gauge<Integer>() {
@Override
public Integer getValue() {
return executor.getMaximumPoolSize();
}
});
} catch (IllegalArgumentException e) {
// Assume this is due to multiple instances
}
}
} else {
container.logger().warn("Vertx is not an instance of VertxInternal, cannot access worker background pool.");
}
}
}