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POStrategy pattern with spring beans
 

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    <p>Say I'm using spring, I have the following strategies...</p> <p>Interface</p> <pre><code>public interface MealStrategy { cook(Meat meat); } </code></pre> <p>First strategy</p> <pre><code>@Component public class BurgerStrategy implements MealStrategy { @Autowired CookerDao cookeryDao; @Override public void cook(Meat meat) { cookeryDao.getBurger(meat); } } </code></pre> <p>Next strategy...</p> <pre><code>@Component public class SausageStrategy implements MealStrategy { @Autowired CookerDao cookeryDao; @Override public cook(Meat meat) { return cookeryDao.getSausage(meat); } } </code></pre> <p>Context...</p> <pre><code>@Component @Scope("prototype") public class MealContext { private MealStrategy mealStrategy; public void setMealStrategy(MealStrategy strategy) { this.strategy = strategy; } public void cookMeal(Meat meat) { mealStrategy.cook; } } </code></pre> <p>Now say this context was being accessed through an mvc controller, like...</p> <pre><code>@Autowired private MealContext mealContext; @RequestMapping(method = RequestMethod.POST) public @ResponseBody Something makeMeal(Meat meat) { mealContext.setMealStrategy(new BurgerStrategy()) mealContext.cookMeal(meat); } </code></pre> <p>Should the context be a component? When I do I get an error saying loadOnStartup an there's a nonUniqueBean that the strategy could be, as you'd expect. Do all of the beans need to be components like above or are my annotations incorrect?</p> <p>My biggest query really is can you use a context like that in a Spring MVC app? The problem I have with using @Scope(prototype) too is it means the cookeryDao calls in the strategies return a null pointer as the Dao's don't get injected.</p> <p>How would I implement the above pattern using spring and also be thread safe? Is what I'm trying even possible?</p>
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    1. COWhat's exactly your problem? all this works for me
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    2. COI want to know if it's thread safe to have a context like I have done
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    3. COalso the above wouldn't work because as I've done `new` this is outside the Spring context?
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