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The official Couchbase JVM Core IO Library
/**
* Copyright (c) 2015 Couchbase, Inc.
*
* 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 DEALING
* IN THE SOFTWARE.
*/
package com.couchbase.client.core.retry;
import com.couchbase.client.core.RequestCancelledException;
import com.couchbase.client.core.ResponseEvent;
import com.couchbase.client.core.ResponseHandler;
import com.couchbase.client.core.env.CoreEnvironment;
import com.couchbase.client.core.message.CouchbaseRequest;
import com.couchbase.client.deps.com.lmax.disruptor.RingBuffer;
/**
* A helper class which contains methods related to retrying operations.
*
* @author Michael Nitschinger
* @since 1.1.0
*/
public class RetryHelper {
/**
* Either retry or cancel a request, based on the strategy used.
*
* @param environment the core environment for context.
* @param request the request to either retry or cancel.
* @param responseBuffer the response buffer where to maybe retry on.
*/
public static void retryOrCancel(final CoreEnvironment environment, final CouchbaseRequest request,
final RingBuffer responseBuffer) {
if (environment.retryStrategy().shouldRetry(request, environment)) {
responseBuffer.publishEvent(ResponseHandler.RESPONSE_TRANSLATOR, request, request.observable());
} else {
request.observable().onError(new RequestCancelledException("Could not dispatch request, cancelling "
+ "instead of retrying."));
}
}
}