com.flipkart.aesop.runtime.bootstrap.DefaultBootstrapProducerFactory.java Source code

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Here is the source code for com.flipkart.aesop.runtime.bootstrap.DefaultBootstrapProducerFactory.java

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/*
 * Copyright 2012-2015, 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
 *
 *      http://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 com.flipkart.aesop.runtime.bootstrap;

import java.util.Properties;

import org.springframework.beans.factory.FactoryBean;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.util.Assert;

import com.flipkart.aesop.runtime.config.BootstrapProducerConfig;
import com.flipkart.aesop.runtime.config.ClientConfig;
import com.linkedin.databus.bootstrap.producer.BootstrapProducerStaticConfig;
import com.linkedin.databus.core.util.ConfigLoader;

/**
 * The Spring factory bean for creating {@link DefaultBootstrapProducer} instances based on configured properties
 * 
 * @author Regunath B
 * @version 1.0, 06 Feb 2014
 */
public class DefaultBootstrapProducerFactory implements FactoryBean<DefaultBootstrapProducer>, InitializingBean {

    /** The configuration details for creating the Relay Client Bootstrap producer */
    private BootstrapProducerConfig bootstrapProducerConfig;

    /** The configuration details for creating the Relay Client*/
    private ClientConfig clientConfig;

    /**
     * Interface method implementation. Creates and returns a {@link DefaultBootstrapProducer} instance
     * @see org.springframework.beans.factory.FactoryBean#getObject()
     */
    public DefaultBootstrapProducer getObject() throws Exception {
        // using fully qualified class name for Databus BootstrapProducerConfig reference as we have class with same name in Aesop as well
        com.linkedin.databus.bootstrap.producer.BootstrapProducerConfig producerConfig = new com.linkedin.databus.bootstrap.producer.BootstrapProducerConfig();
        ConfigLoader<BootstrapProducerStaticConfig> staticProducerConfigLoader = new ConfigLoader<BootstrapProducerStaticConfig>(
                BootstrapProducerConfig.BOOTSTRAP_PROPERTIES_PREFIX, producerConfig);
        // create a merged properties list from Relay Client and Bootstrap specific properties
        Properties mergedProperties = this.bootstrapProducerConfig.getRelayClientBootstrapProperties();
        mergedProperties.putAll(this.clientConfig.getClientProperties());
        BootstrapProducerStaticConfig staticProducerConfig = staticProducerConfigLoader
                .loadConfig(mergedProperties);
        return new DefaultBootstrapProducer(staticProducerConfig);
    }

    /**
     * Interface method implementation. Checks for mandatory dependencies 
     * @see org.springframework.beans.factory.InitializingBean#afterPropertiesSet()
     */
    public void afterPropertiesSet() throws Exception {
        Assert.notNull(this.bootstrapProducerConfig,
                "'bootstrapProducerConfig' cannot be null. This Relay Client Bootstrap producer will not be initialized");
        Assert.notNull(this.clientConfig,
                "'clientConfig' cannot be null. This Relay Client Bootstrap producer will not be initialized");
    }

    /**
     * Interface method implementation. Returns the DefaultBootstrapProducer type
     * @see org.springframework.beans.factory.FactoryBean#getObjectType()
     */
    public Class<DefaultBootstrapProducer> getObjectType() {
        return DefaultBootstrapProducer.class;
    }

    /**
     * Interface method implementation. Returns true
     * @see org.springframework.beans.factory.FactoryBean#isSingleton()
     */
    public boolean isSingleton() {
        return true;
    }

    /** Getter/Setter methods to override default implementations of various components used by this Relay Client*/
    public BootstrapProducerConfig getBootstrapProducerConfig() {
        return bootstrapProducerConfig;
    }

    public void setBootstrapProducerConfig(BootstrapProducerConfig bootstrapProducerConfig) {
        this.bootstrapProducerConfig = bootstrapProducerConfig;
    }

    public ClientConfig getClientConfig() {
        return this.clientConfig;
    }

    public void setClientConfig(ClientConfig clientConfig) {
        this.clientConfig = clientConfig;
    }

}