- /*
- * $Header: /home/cvs/jakarta-commons/httpclient/src/java/org/apache/commons/httpclient/DefaultHttpMethodRetryHandler.java,v 1.2 2004/09/18 11:34:12 olegk Exp $
- * $Revision: 1.2 $
- * $Date: 2004/09/18 11:34:12 $
- *
- * ====================================================================
- *
- * Copyright 1999-2004 The Apache Software Foundation
- *
- * Licensed 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 org.apache.commons.httpclient;
-
- import java.io.IOException;
- import java.io.InterruptedIOException;
-
- /**
- * The default {@link HttpMethodRetryHandler} used by {@link HttpMethod}s.
- *
- * @author Michael Becke
- * @author <a href="mailto:oleg -at- ural.ru">Oleg Kalnichevski</a>
- */
- public class DefaultHttpMethodRetryHandler implements HttpMethodRetryHandler {
-
-
- private static Class SSL_HANDSHAKE_EXCEPTION = null;
-
- static {
- try {
- SSL_HANDSHAKE_EXCEPTION = Class.forName("javax.net.ssl.SSLHandshakeException");
- } catch (ClassNotFoundException ignore) {
- }
- }
- /** the number of times a method will be retried */
- private int retryCount;
-
- /** Whether or not methods that have successfully sent their request will be retried */
- private boolean requestSentRetryEnabled;
-
- /**
- * Default constructor
- */
- public DefaultHttpMethodRetryHandler(int retryCount, boolean requestSentRetryEnabled) {
- super();
- this.retryCount = retryCount;
- this.requestSentRetryEnabled = requestSentRetryEnabled;
- }
-
- /**
- * Default constructor
- */
- public DefaultHttpMethodRetryHandler() {
- this(3, false);
- }
- /**
- * Used <code>retryCount</code> and <code>requestSentRetryEnabled</code> to determine
- * if the given method should be retried.
- *
- * @see HttpMethodRetryHandler#retryMethod(HttpMethod, IOException, int)
- */
- public boolean retryMethod(
- final HttpMethod method,
- final IOException exception,
- int executionCount) {
- if (method == null) {
- throw new IllegalArgumentException("HTTP method may not be null");
- }
- if (exception == null) {
- throw new IllegalArgumentException("Exception parameter may not be null");
- }
- if (executionCount >= this.retryCount) {
- // Do not retry if over max retry count
- return false;
- }
- if (exception instanceof NoHttpResponseException) {
- // Retry if the server dropped connection on us
- return true;
- }
- if (exception instanceof InterruptedIOException) {
- // Timeout
- return false;
- }
- if (SSL_HANDSHAKE_EXCEPTION != null && SSL_HANDSHAKE_EXCEPTION.isInstance(exception)) {
- // SSL handshake exception
- return false;
- }
- if (!method.isRequestSent() || this.requestSentRetryEnabled) {
- // Retry if the request has not been sent fully or
- // if it's OK to retry methods that have been sent
- return true;
- }
- // otherwise do not retry
- return false;
- }
-
- /**
- * @return <code>true</code> if this handler will retry methods that have
- * successfully sent their request, <code>false</code> otherwise
- */
- public boolean isRequestSentRetryEnabled() {
- return requestSentRetryEnabled;
- }
-
- /**
- * @return the maximum number of times a method will be retried
- */
- public int getRetryCount() {
- return retryCount;
- }
- }