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This artifact provides a single jar that contains all classes required to use remote Jakarta Enterprise Beans and Jakarta Messaging, including all dependencies. It is intended for use by those not using maven, maven users should just import the Jakarta Enterprise Beans and Jakarta Messaging BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up with different versions on classes on the class path).
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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.io.IOException;
import java.io.InterruptedIOException;
import java.net.URI;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.http.HttpHost;
import org.apache.http.HttpRequest;
import org.apache.http.HttpResponse;
import org.apache.http.annotation.Contract;
import org.apache.http.annotation.ThreadingBehavior;
import org.apache.http.client.HttpClient;
import org.apache.http.client.ResponseHandler;
import org.apache.http.client.ServiceUnavailableRetryStrategy;
import org.apache.http.client.methods.HttpUriRequest;
import org.apache.http.conn.ClientConnectionManager;
import org.apache.http.params.HttpParams;
import org.apache.http.protocol.HttpContext;
import org.apache.http.util.Args;
import org.apache.http.util.EntityUtils;

/**
 * {@link HttpClient} implementation that can automatically retry the request in case of
 * a non-2xx response using the {@link ServiceUnavailableRetryStrategy} interface.
 *
 * @since 4.2
 *
 * @deprecated (4.3) use {@link HttpClientBuilder}.
 */
@Deprecated
@Contract(threading = ThreadingBehavior.SAFE_CONDITIONAL)
public class AutoRetryHttpClient implements HttpClient {

    private final HttpClient backend;

    private final ServiceUnavailableRetryStrategy retryStrategy;

    private final Log log = LogFactory.getLog(getClass());

    public AutoRetryHttpClient(
            final HttpClient client, final ServiceUnavailableRetryStrategy retryStrategy) {
        super();
        Args.notNull(client, "HttpClient");
        Args.notNull(retryStrategy, "ServiceUnavailableRetryStrategy");
        this.backend = client;
        this.retryStrategy = retryStrategy;
    }

    /**
     * Constructs a {@code AutoRetryHttpClient} with default caching settings that
     * stores cache entries in memory and uses a vanilla
     * {@link DefaultHttpClient} for backend requests.
     */
    public AutoRetryHttpClient() {
        this(new DefaultHttpClient(), new DefaultServiceUnavailableRetryStrategy());
    }

    /**
     * Constructs a {@code AutoRetryHttpClient} with the given caching options that
     * stores cache entries in memory and uses a vanilla
     * {@link DefaultHttpClient} for backend requests.
     *
     * @param config
     *            retry configuration module options
     */
    public AutoRetryHttpClient(final ServiceUnavailableRetryStrategy config) {
        this(new DefaultHttpClient(), config);
    }

    /**
     * Constructs a {@code AutoRetryHttpClient} with default caching settings that
     * stores cache entries in memory and uses the given {@link HttpClient} for
     * backend requests.
     *
     * @param client
     *            used to make origin requests
     */
    public AutoRetryHttpClient(final HttpClient client) {
        this(client, new DefaultServiceUnavailableRetryStrategy());
    }

    @Override
    public HttpResponse execute(final HttpHost target, final HttpRequest request)
            throws IOException {
        final HttpContext defaultContext = null;
        return execute(target, request, defaultContext);
    }

    @Override
    public  T execute(final HttpHost target, final HttpRequest request,
            final ResponseHandler responseHandler) throws IOException {
        return execute(target, request, responseHandler, null);
    }

    @Override
    public  T execute(final HttpHost target, final HttpRequest request,
            final ResponseHandler responseHandler, final HttpContext context)
            throws IOException {
        final HttpResponse resp = execute(target, request, context);
        return responseHandler.handleResponse(resp);
    }

    @Override
    public HttpResponse execute(final HttpUriRequest request) throws IOException {
        final HttpContext context = null;
        return execute(request, context);
    }

    @Override
    public HttpResponse execute(final HttpUriRequest request, final HttpContext context)
            throws IOException {
        final URI uri = request.getURI();
        final HttpHost httpHost = new HttpHost(uri.getHost(), uri.getPort(),
                uri.getScheme());
        return execute(httpHost, request, context);
    }

    @Override
    public  T execute(final HttpUriRequest request,
            final ResponseHandler responseHandler) throws IOException {
        return execute(request, responseHandler, null);
    }

    @Override
    public  T execute(final HttpUriRequest request,
            final ResponseHandler responseHandler, final HttpContext context)
            throws IOException {
        final HttpResponse resp = execute(request, context);
        return responseHandler.handleResponse(resp);
    }

    @Override
    public HttpResponse execute(final HttpHost target, final HttpRequest request,
            final HttpContext context) throws IOException {
        for (int c = 1;; c++) {
            final HttpResponse response = backend.execute(target, request, context);
            try {
                if (retryStrategy.retryRequest(response, c, context)) {
                    EntityUtils.consume(response.getEntity());
                    final long nextInterval = retryStrategy.getRetryInterval();
                    try {
                        log.trace("Wait for " + nextInterval);
                        Thread.sleep(nextInterval);
                    } catch (final InterruptedException e) {
                        Thread.currentThread().interrupt();
                        throw new InterruptedIOException();
                    }
                } else {
                    return response;
                }
            } catch (final RuntimeException ex) {
                try {
                    EntityUtils.consume(response.getEntity());
                } catch (final IOException ioex) {
                    log.warn("I/O error consuming response content", ioex);
                }
                throw ex;
            }
        }
    }

    @Override
    public ClientConnectionManager getConnectionManager() {
        return backend.getConnectionManager();
    }

    @Override
    public HttpParams getParams() {
        return backend.getParams();
    }

}