/*
* Copyright 2014, The OpenNMS Group
*
* 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.opennms.newts.cassandra.search;
import java.io.Serializable;
import java.util.Map;
import java.util.Set;
import com.codahale.metrics.Meter;
import com.google.common.collect.Maps;
import com.google.common.collect.Sets;
public class ResourceMetadata implements Serializable {
private static final long serialVersionUID = 2103401685689076369L;
private final Set<String> m_metrics = Sets.newConcurrentHashSet();
private final Map<String, String> m_attributes = Maps.newConcurrentMap();
private final transient Meter m_metricReqs;
private final transient Meter m_attributeReqs;
private final transient Meter m_metricMisses;
private final transient Meter m_attributeMisses;
public ResourceMetadata(Meter metricReqs, Meter attributeReqs, Meter metricMisses, Meter attributeMisses) {
m_metricReqs = metricReqs;
m_attributeReqs = attributeReqs;
m_metricMisses = metricMisses;
m_attributeMisses = attributeMisses;
}
public ResourceMetadata() {
m_metricReqs = null;
m_attributeReqs = null;
m_metricMisses = null;
m_attributeMisses = null;
}
public boolean containsMetric(String metric) {
if (m_metricReqs != null) m_metricReqs.mark();
boolean contains = m_metrics.contains(metric);
if ((!contains) && m_metricMisses != null) m_metricMisses.mark();
return contains;
}
public ResourceMetadata putMetric(String metric) {
m_metrics.add(metric);
return this;
}
public boolean containsAttribute(String key, String value) {
if (m_attributeReqs != null) m_attributeReqs.mark();
boolean contains = m_attributes.containsKey(key) && m_attributes.get(key).equals(value);
if ((!contains) && m_attributeMisses != null) m_attributeMisses.mark();
return contains;
}
public ResourceMetadata putAttribute(String key, String value) {
m_attributes.put(key, value);
return this;
}
/**
* Merges the metrics and attributes from the given instance, to the current instance.
*
* @param other a {@link ResourceMetadata} object
* @return true if the meta-data was modified as a result of the merge, false otherwise
*/
public boolean merge(ResourceMetadata other) {
boolean modified = m_metrics.addAll(other.m_metrics);
if (!modified) {
modified = !m_attributes.equals(other.m_attributes);
}
m_attributes.putAll(other.m_attributes);
return modified;
}
@Override
public String toString() {
return String.format("%s[metric=%s, attributes=%s]", getClass().getSimpleName(), m_metrics, m_attributes);
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + ((m_attributes == null) ? 0 : m_attributes.hashCode());
result = prime * result + ((m_metrics == null) ? 0 : m_metrics.hashCode());
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj) return true;
if (obj == null) return false;
if (getClass() != obj.getClass()) return false;
ResourceMetadata other = (ResourceMetadata) obj;
if (m_attributes == null) {
if (other.m_attributes != null) return false;
}
else if (!m_attributes.equals(other.m_attributes)) return false;
if (m_metrics == null) {
if (other.m_metrics != null) return false;
}
else if (!m_metrics.equals(other.m_metrics)) return false;
return true;
}
}