/
HandlerResultProcessor.java
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/
HandlerResultProcessor.java
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package org.rapidoid.http.handler;
/*-
* #%L
* rapidoid-http-fast
* %%
* Copyright (C) 2014 - 2017 Nikolche Mihajlovski and contributors
* %%
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
* #L%
*/
import org.rapidoid.RapidoidThing;
import org.rapidoid.datamodel.Results;
import org.rapidoid.http.HttpStatus;
import org.rapidoid.http.NotFound;
import org.rapidoid.http.Req;
import org.rapidoid.http.Resp;
import org.rapidoid.u.U;
import java.util.concurrent.Future;
public class HandlerResultProcessor extends RapidoidThing {
public static final HandlerResultProcessor INSTANCE = new HandlerResultProcessor();
@SuppressWarnings("unchecked")
public Object postProcessResult(Req req, Object result) {
if (result instanceof HttpStatus) {
return result;
} else if (result instanceof Req) {
U.must(req == result, "Unknown request instance was received as result!");
return reqToStatus(req, result);
} else if (result instanceof Resp) {
U.must(req != null && req.response() == result, "Unknown response instance was received as result!");
return reqToStatus(req, result);
} else if (result == null || result instanceof NotFound) { // not found
return HttpStatus.NOT_FOUND;
} else if ((result instanceof Future<?>) || (result instanceof org.rapidoid.concurrent.Future<?>)) { // async
if (req != null) {
req.async();
}
return HttpStatus.ASYNC;
} else if (result instanceof Results) {
return ((Results) result).all(); // fetch while still inside tx (potentially)
} else {
return result;
}
}
private HttpStatus reqToStatus(Req req, Object result) {
if (req.isAsync()) {
U.must(result instanceof HttpStatus || result instanceof Req || result instanceof Resp,
"Didn't expect a direct result from an asynchronous handler!");
return HttpStatus.ASYNC;
}
return HttpStatus.DONE;
}
}