/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.apache.gobblin.metrics;

import java.util.Collection;

import com.codahale.metrics.Metric;
import com.codahale.metrics.MetricFilter;

import com.google.common.collect.ImmutableSet;


/**
 * A type of {@link com.codahale.metrics.MetricFilter}s that matches {@link com.codahale.metrics.Metric}s
 * of type {@link Taggable} that have some given {@link Tag}s.
 *
 * @author Yinan Li
 */
public class TagBasedMetricFilter implements MetricFilter {

  private final Collection<Tag<?>> tags;

  public TagBasedMetricFilter(Collection<Tag<?>> tags) {
    this.tags = ImmutableSet.copyOf(tags);
  }

  @Override
  public boolean matches(String name, Metric metric) {
    return metric instanceof Taggable && ((Taggable) metric).getTags().containsAll(this.tags);
  }
}
