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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
* .
*
*/
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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