/
HttpTxWrapper.java
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/
HttpTxWrapper.java
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/*-
* #%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%
*/
package org.rapidoid.http.handler;
import org.rapidoid.RapidoidThing;
import org.rapidoid.annotation.Authors;
import org.rapidoid.annotation.Since;
import org.rapidoid.annotation.TransactionMode;
import org.rapidoid.http.HttpUtils;
import org.rapidoid.http.HttpWrapper;
import org.rapidoid.http.Req;
import org.rapidoid.http.RespBody;
import org.rapidoid.http.impl.BodyRenderer;
import org.rapidoid.http.impl.RespImpl;
import org.rapidoid.jpa.JPA;
import org.rapidoid.u.U;
import java.util.concurrent.atomic.AtomicReference;
@Authors("Nikolche Mihajlovski")
@Since("5.5.1")
public class HttpTxWrapper extends RapidoidThing implements HttpWrapper {
private final TransactionMode txMode;
public HttpTxWrapper(TransactionMode txMode) {
this.txMode = txMode;
}
@Override
public Object wrap(final Req req, final HandlerInvocation invocation) {
final AtomicReference<Object> result = new AtomicReference<>();
U.must(txMode != null && txMode != TransactionMode.NONE);
boolean readOnly = (txMode == TransactionMode.AUTO)
? HttpUtils.isGetReq(req)
: txMode == TransactionMode.READ_ONLY;
try {
JPA.transaction(new Runnable() {
@Override
public void run() {
Object res;
try {
res = invocation.invoke();
} catch (Exception e) {
// throw to rollback
throw U.rte("Error occurred inside the transactional web handler!", e);
}
if (res instanceof Throwable) {
// throw to rollback
Throwable err = (Throwable) res;
throw U.rte("Error occurred inside the transactional web handler!", err);
} else {
// serialize the result into a HTTP response body, while still inside tx (see #153)
RespImpl resp = (RespImpl) req.response(); // TODO find a cleaner access
RespBody body = BodyRenderer.resultToRespBody(resp, res);
result.set(body);
}
}
}, readOnly);
} catch (Throwable e) {
result.set(e);
}
return result.get();
}
}