Easily get your cloud environment properties in your Spring context initializer

cloud-context-config

package net.nobien.cloudfoundry.example.config;

import java.util.Properties;

import org.cloudfoundry.runtime.env.CloudEnvironment;
import org.cloudfoundry.runtime.env.CloudEnvironmentPropertiesFactoryBean;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.context.ApplicationContextInitializer;
import org.springframework.core.env.ConfigurableEnvironment;
import org.springframework.core.env.PropertiesPropertySource;
import org.springframework.web.context.ConfigurableWebApplicationContext;


public class ContextInitializer implements ApplicationContextInitializer<ConfigurableWebApplicationContext> {

    private static final Logger logger = LoggerFactory.getLogger(ContextInitializer.class);
    
    // The name of a service you created using the vmc command line tool followed by a period. 
    // In this case it is the name of a MongoDB service, but could be MySQL or Redis too.
    public static final String MONGO_SERVICE_PROPERTY_PREFIX = "nobien-example-mongodb.";

    // A prefix for your application properties
    public static final String APPLICATION_PROPERTY_PREFIX = "application.";

    public void initialize(ConfigurableWebApplicationContext applicationContext) {
        ConfigurableEnvironment environment = applicationContext.getEnvironment();
        
        // Create the cloud environment object
        CloudEnvironment cloud = new CloudEnvironment();
        
        // Check the instance info
        if (cloud.getInstanceInfo() != null) {
            // Application is running on cloudfoundry.com
            environment.setActiveProfiles("cloud");
        } else {
            // Application is running somewhere other than cloudfoundry.com
            environment.setActiveProfiles("development");
        }

        if (environment.acceptsProfiles("development")) {
            Properties properties = new Properties();
            // Create mongo service properties for development environment
            properties.put(MONGO_SERVICE_PROPERTY_PREFIX + "hostname", "localhost");
            properties.put(MONGO_SERVICE_PROPERTY_PREFIX + "port", 27017);
            properties.put(MONGO_SERVICE_PROPERTY_PREFIX + "username", "");
            properties.put(MONGO_SERVICE_PROPERTY_PREFIX + "password", "");
            properties.put(MONGO_SERVICE_PROPERTY_PREFIX + "db", "nobiendev");
            properties.put(APPLICATION_PROPERTY_PREFIX + "url", "http://local.hello-nobien.cloudfoundry.com:8080/hello-nobien");
            environment.getPropertySources().addFirst(new PropertiesPropertySource("properties", properties));
        } else if (environment.acceptsProfiles("cloud")) {
            try {
                // Use the factory bean to load the application's service properties
                CloudEnvironmentPropertiesFactoryBean factory = new CloudEnvironmentPropertiesFactoryBean();
                Properties properties = factory.getObject();
                properties.put(APPLICATION_PROPERTY_PREFIX + "url", "http://hello-nobien.cloudfoundry.com");
                environment.getPropertySources().addFirst(new PropertiesPropertySource("properties", properties));
            } catch (Exception e) {
                logger.error("Error loading Cloud properties: " + e.getMessage());
            }
        }
    }
}