com.netflix.servo.BasicMonitorRegistry Maven / Gradle / Ivy
/*
* Copyright 2014 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.servo;
import com.netflix.servo.monitor.Monitor;
import com.netflix.servo.util.Preconditions;
import com.netflix.servo.util.UnmodifiableList;
import java.util.Collection;
import java.util.Collections;
import java.util.HashSet;
import java.util.Set;
/**
* Simple monitor registry backed by a {@link java.util.Set}.
*/
public final class BasicMonitorRegistry implements MonitorRegistry {
private final Set> monitors;
/**
* Creates a new instance.
*/
public BasicMonitorRegistry() {
monitors = Collections.synchronizedSet(new HashSet<>());
}
/**
* The set of registered Monitor objects.
*/
@Override
public Collection> getRegisteredMonitors() {
return UnmodifiableList.copyOf(monitors);
}
/**
* Register a new monitor in the registry.
*/
@Override
public void register(Monitor monitor) {
Preconditions.checkNotNull(monitor, "monitor");
try {
monitors.add(monitor);
} catch (Exception e) {
throw new IllegalArgumentException("invalid object", e);
}
}
/**
* Unregister a Monitor from the registry.
*/
@Override
public void unregister(Monitor monitor) {
Preconditions.checkNotNull(monitor, "monitor");
try {
monitors.remove(monitor);
} catch (Exception e) {
throw new IllegalArgumentException("invalid object", e);
}
}
@Override
public boolean isRegistered(Monitor monitor) {
return monitors.contains(monitor);
}
}