org.springframework.kafka.config.KafkaStreamsConfiguration.java Source code

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Here is the source code for org.springframework.kafka.config.KafkaStreamsConfiguration.java

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/*
 * Copyright 2018-2019 the original author or authors.
 *
 * Licensed 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
 *
 *      https://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.springframework.kafka.config;

import java.util.HashMap;
import java.util.Map;
import java.util.Properties;

import org.springframework.util.Assert;

/**
 * Wrapper for {@link org.apache.kafka.streams.StreamsBuilder} properties. The framework
 * looks for a bean of this type with name 'defaultKafkaStreamsConfig' and auto-declares a
 * {@link StreamsBuilderFactoryBean} using it. The {@link Properties} class is too general
 * for such activity.
 *
 * @author Gary Russell
 * @since 2.2
 *
 */
public class KafkaStreamsConfiguration {

    private final Map<String, Object> configs;

    private Properties properties;

    public KafkaStreamsConfiguration(Map<String, Object> configs) {
        Assert.notNull(configs, "Configuration map cannot be null");
        this.configs = new HashMap<>(configs);
    }

    /**
     * Return the configuration map as a {@link Properties}.
     * @return the properties.
     */
    public Properties asProperties() {
        if (this.properties == null) {
            Properties props = new Properties();
            props.putAll(this.configs);
            this.properties = props;
        }
        return this.properties;
    }

}