001/*
002 * (C) Copyright 2018 Nuxeo (http://nuxeo.com/) and others.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *     http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 *
016 *
017 * Contributors:
018 *     bdelbosc
019 */
020package org.nuxeo.runtime.codec;
021
022import java.util.HashMap;
023import java.util.List;
024import java.util.Map;
025
026import org.apache.logging.log4j.LogManager;
027import org.apache.logging.log4j.Logger;
028import org.nuxeo.lib.stream.codec.Codec;
029import org.nuxeo.runtime.kafka.KafkaConfigServiceImpl;
030import org.nuxeo.runtime.model.ComponentContext;
031import org.nuxeo.runtime.model.DefaultComponent;
032
033public class CodecServiceImpl extends DefaultComponent implements CodecService {
034
035    private static final Logger log = LogManager.getLogger(CodecServiceImpl.class);
036
037    public static final String XP_CODEC = "codec";
038
039    protected final Map<String, CodecFactory> codecFactories = new HashMap<>();
040
041    @Override
042    public void start(ComponentContext context) {
043        super.start(context);
044        List<CodecDescriptor> descriptors = getDescriptors(XP_CODEC);
045        for (CodecDescriptor descriptor : descriptors) {
046            log.debug("Creating CodecFactory : {}", descriptor.klass::getSimpleName);
047            try {
048                CodecFactory factory = descriptor.klass.getDeclaredConstructor().newInstance();
049                factory.init(descriptor.options);
050                codecFactories.put(descriptor.getId(), factory);
051            } catch (ReflectiveOperationException e) {
052                throw new IllegalArgumentException("Invalid class: " + getClass(), e);
053            }
054        }
055    }
056
057    @Override
058    public void stop(ComponentContext context) throws InterruptedException {
059        super.stop(context);
060        codecFactories.clear();
061    }
062
063    @Override
064    public int getApplicationStartedOrder() {
065        return KafkaConfigServiceImpl.APPLICATION_STARTED_ORDER;
066    }
067
068    @Override
069    public <T> Codec<T> getCodec(String codecName, Class<T> objectClass) {
070        if (!codecFactories.containsKey(codecName)) {
071            throw new IllegalArgumentException(
072                    String.format("Invalid codec name: %s, requested for class: %s", codecName, objectClass));
073        }
074        // TODO codec are thread safe so we can use a cache codecName, objectClass -> codec
075        return codecFactories.get(codecName).newCodec(objectClass);
076    }
077}