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/*
* ====================================================================
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*
*/
package ch.boye.httpclientandroidlib.impl.client;
import ch.boye.httpclientandroidlib.HttpResponse;
import ch.boye.httpclientandroidlib.HttpStatus;
import ch.boye.httpclientandroidlib.annotation.Immutable;
import ch.boye.httpclientandroidlib.client.ServiceUnavailableRetryStrategy;
import ch.boye.httpclientandroidlib.protocol.HttpContext;
import ch.boye.httpclientandroidlib.util.Args;
/**
* Default implementation of the {@link ServiceUnavailableRetryStrategy} interface.
* that retries <code>503</code> (Service Unavailable) responses for a fixed number of times
* at a fixed interval.
*
* @since 4.2
*/
@Immutable
public class DefaultServiceUnavailableRetryStrategy implements ServiceUnavailableRetryStrategy {
/**
* Maximum number of allowed retries if the server responds with a HTTP code
* in our retry code list. Default value is 1.
*/
private final int maxRetries;
/**
* Retry interval between subsequent requests, in milliseconds. Default
* value is 1 second.
*/
private final long retryInterval;
public DefaultServiceUnavailableRetryStrategy(final int maxRetries, final int retryInterval) {
super();
Args.positive(maxRetries, "Max retries");
Args.positive(retryInterval, "Retry interval");
this.maxRetries = maxRetries;
this.retryInterval = retryInterval;
}
public DefaultServiceUnavailableRetryStrategy() {
this(1, 1000);
}
public boolean retryRequest(final HttpResponse response, final int executionCount, final HttpContext context) {
return executionCount <= maxRetries &&
response.getStatusLine().getStatusCode() == HttpStatus.SC_SERVICE_UNAVAILABLE;
}
public long getRetryInterval() {
return retryInterval;
}
}
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