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 * or more contributor license agreements.  See the NOTICE file
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 * 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
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package org.apache.http.impl.client;

import java.util.Locale;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;

import org.apache.http.HttpRequest;
import org.apache.http.annotation.Contract;
import org.apache.http.annotation.ThreadingBehavior;

/**
 * {@link org.apache.http.client.HttpRequestRetryHandler} which assumes
 * that all requested HTTP methods which should be idempotent according
 * to RFC-2616 are in fact idempotent and can be retried.
 * 

* According to RFC-2616 section 9.1.2 the idempotent HTTP methods are: * GET, HEAD, PUT, DELETE, OPTIONS, and TRACE *

* * @since 4.2 */ @Contract(threading = ThreadingBehavior.IMMUTABLE) public class StandardHttpRequestRetryHandler extends DefaultHttpRequestRetryHandler { private final Map idempotentMethods; /** * Default constructor */ public StandardHttpRequestRetryHandler(final int retryCount, final boolean requestSentRetryEnabled) { super(retryCount, requestSentRetryEnabled); this.idempotentMethods = new ConcurrentHashMap(); this.idempotentMethods.put("GET", Boolean.TRUE); this.idempotentMethods.put("HEAD", Boolean.TRUE); this.idempotentMethods.put("PUT", Boolean.TRUE); this.idempotentMethods.put("DELETE", Boolean.TRUE); this.idempotentMethods.put("OPTIONS", Boolean.TRUE); this.idempotentMethods.put("TRACE", Boolean.TRUE); } /** * Default constructor */ public StandardHttpRequestRetryHandler() { this(3, false); } @Override protected boolean handleAsIdempotent(final HttpRequest request) { final String method = request.getRequestLine().getMethod().toUpperCase(Locale.ROOT); final Boolean b = this.idempotentMethods.get(method); return b != null && b.booleanValue(); } }




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