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.AbstractMap;
020import java.util.AbstractSet;
021import java.util.Arrays;
022import java.util.Iterator;
023import java.util.Map;
024import java.util.Set;
025import java.util.concurrent.ConcurrentHashMap;
026
027import org.apache.camel.CamelContext;
028import org.apache.camel.Endpoint;
029import org.apache.camel.spi.EndpointRegistry;
030import org.apache.camel.util.CamelContextHelper;
031import org.apache.camel.util.CompoundIterator;
032import org.apache.camel.util.LRUCache;
033import org.apache.camel.util.LRUCacheFactory;
034import org.apache.camel.util.ServiceHelper;
035
036/**
037 * Default implementation of {@link org.apache.camel.spi.EndpointRegistry}
038 */
039public class DefaultEndpointRegistry extends AbstractMap<EndpointKey, Endpoint> implements EndpointRegistry<EndpointKey> {
040    private static final long serialVersionUID = 1L;
041    private Map<EndpointKey, Endpoint> dynamicMap;
042    private Map<EndpointKey, Endpoint> staticMap;
043    private final CamelContext context;
044    private int maxCacheSize;
045
046    public DefaultEndpointRegistry(CamelContext context) {
047        this.maxCacheSize = CamelContextHelper.getMaximumEndpointCacheSize(context);
048        // do not stop on eviction, as the validator may still be in use
049        this.dynamicMap = LRUCacheFactory.newLRUCache(maxCacheSize, maxCacheSize, false);
050        // static map to hold endpoints we do not want to be evicted
051        this.staticMap = new ConcurrentHashMap<>();
052        this.context = context;
053    }
054
055    public DefaultEndpointRegistry(CamelContext context, Map<EndpointKey, Endpoint> endpoints) {
056        this(context);
057        putAll(endpoints);
058    }
059
060    @Override
061    public void start() throws Exception {
062        if (dynamicMap instanceof LRUCache) {
063            ((LRUCache) dynamicMap).resetStatistics();
064        }
065    }
066
067    @Override
068    public Endpoint get(Object o) {
069        // try static map first
070        Endpoint answer = staticMap.get(o);
071        if (answer == null) {
072            answer = dynamicMap.get(o);
073            if (answer != null && (context.isSetupRoutes() || context.isStartingRoutes())) {
074                dynamicMap.remove(o);
075                staticMap.put((EndpointKey) o, answer);
076            }
077        }
078        return answer;
079    }
080
081    @Override
082    public Endpoint put(EndpointKey key, Endpoint endpoint) {
083        // at first we must see if the key already exists and then replace it back, so it stays the same spot
084        Endpoint answer = staticMap.remove(key);
085        if (answer != null) {
086            // replace existing
087            staticMap.put(key, endpoint);
088            return answer;
089        }
090
091        answer = dynamicMap.remove(key);
092        if (answer != null) {
093            // replace existing
094            dynamicMap.put(key, endpoint);
095            return answer;
096        }
097
098        // we want endpoints to be static if they are part of setting up or starting routes
099        if (context.isSetupRoutes() || context.isStartingRoutes()) {
100            answer = staticMap.put(key, endpoint);
101        } else {
102            answer = dynamicMap.put(key, endpoint);
103        }
104
105        return answer;
106    }
107
108    @Override
109    public boolean containsKey(Object o) {
110        return staticMap.containsKey(o) || dynamicMap.containsKey(o);
111    }
112
113    @Override
114    public boolean containsValue(Object o) {
115        return staticMap.containsValue(o) || dynamicMap.containsValue(o);
116    }
117
118    @Override
119    public int size() {
120        return staticMap.size() + dynamicMap.size();
121    }
122
123    public int staticSize() {
124        return staticMap.size();
125    }
126
127    @Override
128    public int dynamicSize() {
129        return dynamicMap.size();
130    }
131
132    @Override
133    public boolean isEmpty() {
134        return staticMap.isEmpty() && dynamicMap.isEmpty();
135    }
136
137    @Override
138    public Endpoint remove(Object o) {
139        Endpoint answer = staticMap.remove(o);
140        if (answer == null) {
141            answer = dynamicMap.remove(o);
142        }
143        return answer;
144    }
145
146    @Override
147    public void clear() {
148        staticMap.clear();
149        dynamicMap.clear();
150    }
151
152    @Override
153    public Set<Entry<EndpointKey, Endpoint>> entrySet() {
154        return new AbstractSet<Entry<EndpointKey, Endpoint>>() {
155            @Override
156            public Iterator<Entry<EndpointKey, Endpoint>> iterator() {
157                return new CompoundIterator<>(Arrays.asList(
158                        staticMap.entrySet().iterator(), dynamicMap.entrySet().iterator()
159                ));
160            }
161
162            @Override
163            public int size() {
164                return staticMap.size() + dynamicMap.size();
165            }
166        };
167    }
168
169    @Override
170    public int getMaximumCacheSize() {
171        return maxCacheSize;
172    }
173
174    /**
175     * Purges the cache
176     */
177    @Override
178    public void purge() {
179        // only purge the dynamic part
180        dynamicMap.clear();
181    }
182
183    @Override
184    public void cleanUp() {
185        if (dynamicMap instanceof LRUCache) {
186            ((LRUCache) dynamicMap).cleanUp();
187        }
188    }
189
190    @Override
191    public boolean isStatic(String key) {
192        return staticMap.containsKey(new EndpointKey(key));
193    }
194
195    @Override
196    public boolean isDynamic(String key) {
197        return dynamicMap.containsKey(new EndpointKey(key));
198    }
199
200    @Override
201    public void stop() throws Exception {
202        ServiceHelper.stopServices(staticMap.values());
203        ServiceHelper.stopServices(values());
204        purge();
205    }
206
207    @Override
208    public String toString() {
209        return "EndpointRegistry for " + context.getName() + ", capacity: " + maxCacheSize;
210    }
211}