com.metamx.metrics.Monitors Maven / Gradle / Ivy
/*
* Copyright 2012 Metamarkets Group 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.metamx.metrics;
import java.util.List;
import java.util.Map;
public class Monitors
{
/**
* Creates a JVM monitor, configured with the given dimensions, that gathers all currently available JVM-wide
* monitors. Emitted events have default feed {@link FeedDefiningMonitor#DEFAULT_METRICS_FEED}
* See: {@link Monitors#createCompoundJvmMonitor(Map, String)}
*
* @param dimensions common dimensions to configure the JVM monitor with
* @return a universally useful JVM-wide monitor
*/
public static Monitor createCompoundJvmMonitor(Map dimensions)
{
return createCompoundJvmMonitor(dimensions, FeedDefiningMonitor.DEFAULT_METRICS_FEED);
}
/**
* Creates a JVM monitor, configured with the given dimensions, that gathers all currently available JVM-wide
* monitors: {@link JvmMonitor}, {@link JvmCpuMonitor} and {@link JvmThreadsMonitor} (this list may
* change in any future release of this library, including a minor release).
*
* @param dimensions common dimensions to configure the JVM monitor with
* @param feed feed for all emitted events
* @return a universally useful JVM-wide monitor
*/
public static Monitor createCompoundJvmMonitor(Map dimensions, String feed)
{
// This list doesn't include SysMonitor because it should probably be run only in one JVM, if several JVMs are
// running on the same instance, so most of the time SysMonitor should be configured/set up differently than
// "simple" JVM monitors, created below.
return and( // Could equally be or(), because all member monitors always return true from their monitor() methods.
new JvmMonitor(dimensions, feed),
new JvmCpuMonitor(dimensions, feed),
new JvmThreadsMonitor(dimensions, feed)
);
}
public static Monitor and(Monitor... monitors)
{
return new CompoundMonitor(monitors)
{
@Override
public boolean shouldReschedule(List reschedules)
{
boolean b = true;
for (boolean reschedule : reschedules) {
b = b && reschedule;
}
return b;
}
};
}
public static Monitor or(Monitor... monitors)
{
return new CompoundMonitor(monitors)
{
@Override
public boolean shouldReschedule(List reschedules)
{
boolean b = false;
for (boolean reschedule : reschedules) {
b = b || reschedule;
}
return b;
}
};
}
}