Gradle原碼入門七，gradle原碼

Gradle原碼入門七，gradle原碼

今天分析了Object org.gradle.internal.service.DefaultServiceRegistry.doGet(Type serviceType) 函數

    private Object doGet(Type serviceType) throws IllegalArgumentException {        synchronized (lock) {            if (closed) {                throw new IllegalStateException(String.format("Cannot locate service of type %s, as %s has been closed.", format(serviceType), displayName));            }            DefaultLookupContext context = new DefaultLookupContext();            ServiceProvider provider = context.find(serviceType, allServices);            if (provider != null) {                return provider.get();            }            throw new UnknownServiceException(serviceType, String.format("No service of type %s available in %s.", format(serviceType), displayName));        }    }

這裡重點是context.find(serviceType, allServices);

allServices 是一個CompositeProvider型變數, 在serviceType是某些值的時候,會走到

CompositeProvider類的getService裡面, 類圖可以看到它自身也維護了一個Provider的List,

遍曆該list,   繼續provider.getSerivce

預設ownservices也是allServices.providers的一員, ownServices的幾何從前文<六>中的

1.   findDecoratorMethods(target, type, methods, ownServices);  
2.             findFactoryMethods(target, type, methods, ownServices);  

中來,

結果

例如當serviceType是 interface org.gradle.logging.StyledTextOutputFactory

provider就是Service StyledTextOutputFactory at LoggingServiceRegistry.createStyledTextOutputFactory()