/*
* Copyright 2012-2017 the original author or authors.
*
* 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 org.springframework.boot.actuate.metrics.opentsdb;
import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.Map;
import org.springframework.util.ObjectUtils;
/**
* A naming strategy that just passes through the metric name, together with tags from a
* set of static values. Open TSDB requires at least one tag, so tags are always added for
* you: the {@value #DOMAIN_KEY} key is added with a value "spring", and the
* {@value #PROCESS_KEY} key is added with a value equal to the object hash of "this" (the
* naming strategy). The "domain" value is a system identifier - it would be common to all
* processes in the same distributed system. In most cases this will be unique enough to
* allow aggregation of the underlying metrics in Open TSDB, but normally it is best to
* provide your own tags, including a prefix and process identifier if you know one
* (overwriting the default).
*
* @author Dave Syer
* @since 1.3.0
*/
public class DefaultOpenTsdbNamingStrategy implements OpenTsdbNamingStrategy {
/**
* The domain key.
*/
public static final String DOMAIN_KEY = "domain";
/**
* The process key.
*/
public static final String PROCESS_KEY = "process";
/**
* Tags to apply to every metric. Open TSDB requires at least one tag, so a "prefix"
* tag is added for you by default.
*/
private Map<String, String> tags = new LinkedHashMap<>();
private Map<String, OpenTsdbName> cache = new HashMap<>();
public DefaultOpenTsdbNamingStrategy() {
this.tags.put(DOMAIN_KEY, "org.springframework.metrics");
this.tags.put(PROCESS_KEY, ObjectUtils.getIdentityHexString(this));
}
public void setTags(Map<String, String> staticTags) {
this.tags.putAll(staticTags);
}
@Override
public OpenTsdbName getName(String name) {
if (this.cache.containsKey(name)) {
return this.cache.get(name);
}
OpenTsdbName value = new OpenTsdbName(name);
value.setTags(this.tags);
this.cache.put(name, value);
return value;
}
}