package com.dockerx.rxjavaweb.returnhandler; import org.springframework.core.MethodParameter; import org.springframework.web.context.request.NativeWebRequest; import org.springframework.web.context.request.async.DeferredResult; import org.springframework.web.context.request.async.WebAsyncUtils; import org.springframework.web.method.support.AsyncHandlerMethodReturnValueHandler; import org.springframework.web.method.support.ModelAndViewContainer; import rx.Observable; /** * @author Author 知秋 * @email [email protected] * @time Created by Auser on 2018/3/23 18:59. */ public class ObservableReturnValueHandler implements AsyncHandlerMethodReturnValueHandler{ @Override public boolean isAsyncReturnValue(Object returnValue, MethodParameter returnType) { return returnValue != null && supportsReturnType(returnType); } @Override public boolean supportsReturnType(MethodParameter returnType) { return Observable.class.isAssignableFrom(returnType.getParameterType()); } @Override public void handleReturnValue(Object returnValue, MethodParameter returnType, ModelAndViewContainer mavContainer, NativeWebRequest webRequest) throws Exception { if (returnValue == null) { mavContainer.setRequestHandled(true); return; } final Observable<?> observable = Observable.class.cast(returnValue); WebAsyncUtils.getAsyncManager(webRequest) .startDeferredResultProcessing(new ObservableAdapter<>(observable), mavContainer); } public class ObservableAdapter<T> extends DeferredResult<T> { ObservableAdapter(Observable<T> observable) { observable.subscribe(this::setResult, this::setErrorResult); } } }