MyContextInitializer.java

package foo.bar;

import org.springframework.context.ApplicationContextInitializer;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.core.env.ConfigurableEnvironment;

public class MyContextInitializer implements 
       ApplicationContextInitializer<ConfigurableApplicationContext> {

  private static final String PROP = "com.google.appengine.runtime.environment";

  public void initialize(ConfigurableApplicationContext applicationContext) {
    ConfigurableEnvironment springEnvironment = applicationContext.getEnvironment();
    String appengine_property = System.getProperty(PROP);
    if ("Production".equals(appengine_property))
      springEnvironment.setActiveProfiles("production");
    else
      springEnvironment.setActiveProfiles("local");
  }
}