blob: fff8a4dc48e6925a6cf5b8e16d03a342cdcc732d (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
|
// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.container.jdisc.metric;
import com.yahoo.component.annotation.Inject;
import com.yahoo.component.provider.ComponentRegistry;
import com.yahoo.container.jdisc.MetricConsumerFactory;
import com.yahoo.jdisc.application.MetricConsumer;
/**
* <p>The purpose of this class it to be the only provider for the <code>MetricConsumer</code> interface in a component
* graph. This component is automatically registered in the graph by the config server. Configuring a different
* <code>MetricConsumer</code> is done by registering one or more {@link MetricConsumerFactory} in the services-file.</p>
*
* <p>Because this class depends on the {@link ComponentRegistry} of {@link MetricConsumerFactory}, any added or removed
* {@link MetricConsumerFactory} will cause this component to be reconfigured. Because {@link MetricProvider} depends on
* this class, which means any component that uses <code>Metric</code> will be reconfigured. Any component that depends
* directly on <code>MetricConsumer</code> will also be reconfigured.</p>
*
* @author Simon Thoresen Hult
*/
public class MetricConsumerProvider {
private final MetricConsumerFactory[] factories;
@Inject
public MetricConsumerProvider(ComponentRegistry<MetricConsumerFactory> factoryRegistry) {
MetricConsumerFactory[] factories = new MetricConsumerFactory[factoryRegistry.getComponentCount()];
factoryRegistry.allComponents().toArray(factories);
this.factories = factories;
}
public MetricConsumer newInstance() {
if (factories.length == 1) {
return factories[0].newInstance();
}
MetricConsumer[] consumers = new MetricConsumer[factories.length];
for (int i = 0; i < factories.length; ++i) {
consumers[i] = factories[i].newInstance();
}
return new ForwardingMetricConsumer(consumers);
}
}
|