Conditional Beans

@Component
@Profile("dev")
public class FakePaymentClient implements PaymentClient {
    private int calls = 0;

    public FakePaymentClient() {
        log.info("FakePaymentClient: every charge will be approved, no money moves");
    }

    @Override
    public PaymentResult charge(String customerEmail, int amountInCents) {
        calls++;
        return new PaymentResult(true, "fake-" + calls);
    }
}

@Component
@Profile("!dev")
public class HttpPaymentClient implements PaymentClient { ... }

.....

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