001/**
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 *      http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package org.apache.camel.impl;
018
019import java.util.Collections;
020import java.util.Map;
021
022import org.apache.camel.spi.EndpointUtilizationStatistics;
023import org.apache.camel.util.LRUCacheFactory;
024
025public class DefaultEndpointUtilizationStatistics implements EndpointUtilizationStatistics {
026
027    private final int maxCapacity;
028    private final Map<String, Long> map;
029
030    @SuppressWarnings("unchecked")
031    public DefaultEndpointUtilizationStatistics(int maxCapacity) {
032        this.map = LRUCacheFactory.newLRUCache(16, maxCapacity, false);
033        this.maxCapacity = maxCapacity;
034    }
035
036    @Override
037    public int maxCapacity() {
038        return maxCapacity;
039    }
040
041    @Override
042    public int size() {
043        return map.size();
044    }
045
046    @Override
047    public void onHit(String uri) {
048        map.compute(uri, (key, current) -> {
049            if (current == null) {
050                return 1L;
051            } else {
052                return ++current;
053            }
054        });
055    }
056
057    @Override
058    public void remove(String uri) {
059        map.remove(uri);
060    }
061
062    @Override
063    public Map<String, Long> getStatistics() {
064        return Collections.unmodifiableMap(map);
065    }
066
067    @Override
068    public void clear() {
069        map.clear();
070    }
071}