com.netflix.hystrix.HystrixCommandGroupKey Maven / Gradle / Ivy
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/**
* 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;
import com.netflix.hystrix.util.InternMap;
/**
* A group name for a {@link HystrixCommand}. This is used for grouping together commands such as for reporting, alerting, dashboards or team/library ownership.
*
* By default this will be used to define the {@link HystrixThreadPoolKey} unless a separate one is defined.
*
* This interface is intended to work natively with Enums so that implementing code can have an enum with the owners that implements this interface.
*/
public interface HystrixCommandGroupKey extends HystrixKey {
class Factory {
private Factory() {
}
// used to intern instances so we don't keep re-creating them millions of times for the same key
private static final InternMap intern
= new InternMap(
new InternMap.ValueConstructor() {
@Override
public HystrixCommandGroupDefault create(String key) {
return new HystrixCommandGroupDefault(key);
}
});
/**
* Retrieve (or create) an interned HystrixCommandGroup instance for a given name.
*
* @param name command group name
* @return HystrixCommandGroup instance that is interned (cached) so a given name will always retrieve the same instance.
*/
public static HystrixCommandGroupKey asKey(String name) {
return intern.interned(name);
}
private static class HystrixCommandGroupDefault extends HystrixKey.HystrixKeyDefault implements HystrixCommandGroupKey {
public HystrixCommandGroupDefault(String name) {
super(name);
}
}
/* package-private */ static int getGroupCount() {
return intern.size();
}
}
}