com.payu.ratel.config.beans.RegistryBeanProviderFactory.java Source code

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Here is the source code for com.payu.ratel.config.beans.RegistryBeanProviderFactory.java

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/*
 * Copyright 2015 PayU
 *
 * 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.payu.ratel.config.beans;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.NoSuchBeanDefinitionException;
import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
import org.springframework.beans.factory.support.DefaultListableBeanFactory;
import org.springframework.core.env.Environment;

import com.payu.ratel.client.standalone.RatelClientFactory;
import com.payu.ratel.client.standalone.RatelStandaloneFactory;

public class RegistryBeanProviderFactory {

    private static final Logger LOGGER = LoggerFactory.getLogger(RegistryBeanProviderFactory.class);

    public static final String SERVICE_DISCOVERY = "serviceDiscovery";
    public static final String SERVICE_DISCOVERY_ADDRESS = SERVICE_DISCOVERY + ".ratelServerAddress";
    public static final String SERVICE_DISCOVERY_ZK_HOST = SERVICE_DISCOVERY + ".zkHost";

    public RegistryStrategiesProvider create(ConfigurableListableBeanFactory beanFactory) {
        final Environment environment = beanFactory.getBean(Environment.class);

        if ("false".equals(environment.getProperty(RatelContextApplier.SERVICE_DISCOVERY_ENABLED))) {
            LOGGER.info("Ratel is disabled");
            return null;
        }

        LOGGER.info("Ratel is enabled");
        RegistryStrategiesProvider registryBeanProvider;
        try {
            registryBeanProvider = beanFactory.getBean(RegistryStrategiesProvider.class);
            LOGGER.info("Ratel was already configured, skiping second initialization");
        } catch (NoSuchBeanDefinitionException e) {
            registryBeanProvider = createAndRegisterStrategiesProvider(beanFactory);
            LOGGER.info("Ratel is configured");
        }
        return registryBeanProvider;

    }

    private RegistryStrategiesProvider createAndRegisterStrategiesProvider(
            ConfigurableListableBeanFactory beanFactory) {
        RegistryStrategiesProvider registryBeanProvider;
        registryBeanProvider = doCreate(beanFactory);
        final String registryBeanName = registryBeanProvider.getClass().getName();
        ((DefaultListableBeanFactory) beanFactory).registerDisposableBean(registryBeanName, registryBeanProvider);
        beanFactory.registerSingleton(registryBeanName, registryBeanProvider);
        beanFactory.initializeBean(registryBeanProvider, registryBeanName);
        RatelClientFactory standaloneFactory = RatelStandaloneFactory.fromBeanFactory(beanFactory);
        beanFactory.registerSingleton(standaloneFactory.getClass().getName(), standaloneFactory);
        return registryBeanProvider;
    }

    protected RegistryStrategiesProvider doCreate(ConfigurableListableBeanFactory beanFactory) {
        final Environment environment = beanFactory.getBean(Environment.class);

        if (environment.containsProperty(SERVICE_DISCOVERY_ZK_HOST)) {
            return new ZookeeperRegistryBeanProvider(beanFactory);
        } else if (environment.containsProperty(SERVICE_DISCOVERY_ADDRESS)) {
            return new InMemoryRegistryBeanProviderFactory(beanFactory);
        }

        throw new IllegalStateException(String.format("Provide one of props with registry either %s or %s",
                SERVICE_DISCOVERY_ZK_HOST, SERVICE_DISCOVERY_ADDRESS));
    }
}