001/*
002 * (C) Copyright 2020 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 * Contributors:
017 *     bdelbosc
018 */
019package org.nuxeo.runtime.codec;
020
021import java.util.Map;
022
023import org.nuxeo.lib.stream.codec.Codec;
024import org.nuxeo.lib.stream.computation.Record;
025
026/**
027 * Factory to generate Record compliant with Confluent Avro, ready to be used by ksqlDB.
028 *
029 * @since 11.4
030 */
031public class AvroRecordCodecFactory implements CodecFactory {
032
033    public static final String KEY_SCHEMA_REGISTRY_URLS = "schemaRegistryUrls";
034
035    public static final String DEFAULT_SCHEMA_REGISTRY_URLS = "http://localhost:8081";
036
037    public static final String KEY_MESSAGE_CLASS = "messageClass";
038
039    protected String messageClassName;
040
041    protected String schemaRegistryUrls;
042
043    @Override
044    public void init(Map<String, String> options) {
045        messageClassName = options.get(KEY_MESSAGE_CLASS);
046        if (messageClassName == null) {
047            throw new IllegalArgumentException("AvroRecordCodecFactory requires a messageClass option.");
048        }
049        schemaRegistryUrls = options.getOrDefault(KEY_SCHEMA_REGISTRY_URLS, DEFAULT_SCHEMA_REGISTRY_URLS);
050    }
051
052    @Override
053    public <T> Codec<T> newCodec(Class<T> objectClass) {
054        if (!objectClass.isAssignableFrom(Record.class)) {
055            throw new IllegalArgumentException(
056                    "AvroRecordCodecFactory works only Computation Record not: " + objectClass);
057        }
058        try {
059            return new AvroRecordCodec(messageClassName, schemaRegistryUrls);
060        } catch (ClassNotFoundException e) {
061            throw new IllegalArgumentException("Invalid messageClass: " + messageClassName);
062        }
063    }
064}