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/*
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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
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 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
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 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
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package cz.msebera.android.httpclient.impl.execchain;

import java.io.IOException;
import java.io.InterruptedIOException;

import cz.msebera.android.httpclient.extras.HttpClientAndroidLog;
/* LogFactory removed by HttpClient for Android script. */
import cz.msebera.android.httpclient.Header;
import cz.msebera.android.httpclient.HttpException;
import cz.msebera.android.httpclient.annotation.Immutable;
import cz.msebera.android.httpclient.client.ServiceUnavailableRetryStrategy;
import cz.msebera.android.httpclient.client.methods.CloseableHttpResponse;
import cz.msebera.android.httpclient.client.methods.HttpExecutionAware;
import cz.msebera.android.httpclient.client.methods.HttpRequestWrapper;
import cz.msebera.android.httpclient.client.protocol.HttpClientContext;
import cz.msebera.android.httpclient.conn.routing.HttpRoute;
import cz.msebera.android.httpclient.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.
 * 

* 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; } @Override 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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