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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.execchain;
import java.io.IOException;
import java.io.InterruptedIOException;
import ch.boye.httpclientandroidlib.androidextra.HttpClientAndroidLog;
/* LogFactory removed by HttpClient for Android script. */
import ch.boye.httpclientandroidlib.Header;
import ch.boye.httpclientandroidlib.HttpException;
import ch.boye.httpclientandroidlib.annotation.Immutable;
import ch.boye.httpclientandroidlib.client.ServiceUnavailableRetryStrategy;
import ch.boye.httpclientandroidlib.client.methods.CloseableHttpResponse;
import ch.boye.httpclientandroidlib.client.methods.HttpExecutionAware;
import ch.boye.httpclientandroidlib.client.methods.HttpRequestWrapper;
import ch.boye.httpclientandroidlib.client.protocol.HttpClientContext;
import ch.boye.httpclientandroidlib.conn.routing.HttpRoute;
import ch.boye.httpclientandroidlib.util.Args;
/**
* Request executor in the request execution chain that is responsible
* for making a decision whether a request that received a non-2xx response
* from the target server should be re-executed.
* <p/>
* Further responsibilities such as communication with the opposite
* endpoint is delegated to the next executor in the request execution
* chain.
*
* @since 4.3
*/
@Immutable
public class ServiceUnavailableRetryExec implements ClientExecChain {
public HttpClientAndroidLog log = new HttpClientAndroidLog(getClass());
private final ClientExecChain requestExecutor;
private final ServiceUnavailableRetryStrategy retryStrategy;
public ServiceUnavailableRetryExec(
final ClientExecChain requestExecutor,
final ServiceUnavailableRetryStrategy retryStrategy) {
super();
Args.notNull(requestExecutor, "HTTP request executor");
Args.notNull(retryStrategy, "Retry strategy");
this.requestExecutor = requestExecutor;
this.retryStrategy = retryStrategy;
}
public CloseableHttpResponse execute(
final HttpRoute route,
final HttpRequestWrapper request,
final HttpClientContext context,
final HttpExecutionAware execAware) throws IOException, HttpException {
final Header[] origheaders = request.getAllHeaders();
for (int c = 1;; c++) {
final CloseableHttpResponse response = this.requestExecutor.execute(
route, request, context, execAware);
try {
if (this.retryStrategy.retryRequest(response, c, context)) {
response.close();
final long nextInterval = this.retryStrategy.getRetryInterval();
if (nextInterval > 0) {
try {
this.log.trace("Wait for " + nextInterval);
Thread.sleep(nextInterval);
} catch (final InterruptedException e) {
Thread.currentThread().interrupt();
throw new InterruptedIOException();
}
}
request.setHeaders(origheaders);
} else {
return response;
}
} catch (final RuntimeException ex) {
response.close();
throw ex;
}
}
}
}
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