io.joshworks.snappy.http.HttpEntrypoint Maven / Gradle / Ivy
/*
* Copyright 2017 Josue Gontijo
*
* 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.
*
*/
package io.joshworks.snappy.http;
import io.joshworks.snappy.Exchange;
import io.joshworks.snappy.handler.HandlerUtil;
import io.undertow.server.HttpHandler;
import io.undertow.server.HttpServerExchange;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import static io.joshworks.snappy.SnappyServer.*;
/**
* Created by Josh Gontijo on 3/15/17.
*/
public abstract class HttpEntrypoint implements HttpHandler {
private static final Logger logger = LoggerFactory.getLogger(LOGGER_NAME);
private final HttpConsumer endpoint;
private final ExceptionMapper exceptionMapper;
public HttpEntrypoint(HttpConsumer endpoint, ExceptionMapper exceptionMapper) {
this.endpoint = endpoint;
this.exceptionMapper = exceptionMapper;
}
protected abstract T createExchange(HttpServerExchange exchange);
@Override
public void handleRequest(HttpServerExchange exchange) {
T httpExchange = createExchange(exchange);
try {
if (!exchange.isResponseComplete()) {
endpoint.accept(httpExchange);
}
} catch (Exception e) {
if (exchange.isResponseChannelAvailable() && !exchange.isResponseComplete()) {
//unwraps the original caught from RestConsumer
if (e instanceof ApplicationException) {
e = ((ApplicationException) e).original;
}
logger.error(HandlerUtil.exceptionMessageTemplate(exchange, "Application error"), e);
exceptionMapper.getOrFallback(e).accept(e, httpExchange);
exchange.endExchange();
} else {
logger.error(e.getMessage(), e);
}
}
}
}