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/*
* The MIT License (MIT)
*
* Copyright (c) 2019 Vedran Grgo Vatavuk
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
package hr.com.vgv.verano.http.wire;
import com.jcabi.log.Logger;
import hr.com.vgv.verano.http.Dict;
import hr.com.vgv.verano.http.Wire;
import hr.com.vgv.verano.http.parts.Method;
import hr.com.vgv.verano.http.parts.RequestUri;
import hr.com.vgv.verano.http.response.Status;
import java.net.HttpURLConnection;
/**
* Wire that retries sending a request specified number of times before throwing
* an exception.
*
* Example of usage:
*
*
* new Response(
* new RetryWire(
* new ApacheWire("https://example.com"), 5
* ),
* new Post(
* new Body("Hello World!")
* )
* ).touch();
*
*
* @since 1.0
*/
@SuppressWarnings(
{"PMD.AvoidCatchingGenericException", "PMD.GuardLogStatement"}
)
public class RetryWire implements Wire {
/**
* Original wire.
*/
private final Wire origin;
/**
* Number of attempts before throwing an exception.
*/
private final int attempts;
/**
* Ctor.
* @param origin Original wire
*/
public RetryWire(final Wire origin) {
//@checkstyle MagicNumberCheck (1 lines)
this(origin, 3);
}
/**
* Ctor.
* @param origin Original wire
* @param attempts Number of attempts before throwing an exception
*/
public RetryWire(final Wire origin, final int attempts) {
this.origin = origin;
this.attempts = attempts;
}
@Override
public final Dict send(final Dict request) {
int attempt = 0;
final String method = new Method.Of(request).asString();
final String uri = new RequestUri.Of(request).asString();
while (attempt < this.attempts) {
try {
final Dict response = this.origin.send(request);
final int status = new Status.Of(response).intValue();
if (status < HttpURLConnection.HTTP_INTERNAL_ERROR) {
return response;
}
Logger.warn(
this, "%s %s returns %d status (attempt #%d)",
method, uri, status, attempt + 1
);
//@checkstyle IllegalCatchCheck (1 lines)
} catch (final Exception ex) {
Logger.warn(
this, "%s: %s",
ex.getClass().getName(), ex.getLocalizedMessage()
);
}
++attempt;
}
throw new IllegalStateException(
String.format("Failed after %d attempts", attempt)
);
}
}
