org.codelabor.system.services.HttpAdapterServiceImpl.java Source code

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Here is the source code for org.codelabor.system.services.HttpAdapterServiceImpl.java

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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.
 */

package org.codelabor.system.services;

import java.util.Iterator;
import java.util.Locale;
import java.util.Map;
import java.util.Set;

import org.apache.commons.httpclient.DefaultHttpMethodRetryHandler;
import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.HttpStatus;
import org.apache.commons.httpclient.methods.GetMethod;
import org.apache.commons.httpclient.params.DefaultHttpParams;
import org.apache.commons.httpclient.params.HttpClientParams;
import org.apache.commons.httpclient.params.HttpMethodParams;
import org.apache.commons.httpclient.params.HttpParams;
import org.apache.commons.httpclient.util.URIUtil;

/**
 * @author Sang Jae Shin
 * 
 */
public class HttpAdapterServiceImpl extends BaseServiceImpl implements HttpAdapterService {

    private String url = null;

    private int retry = 3;

    public String getUrl() {
        return url;
    }

    public void setUrl(String url) {
        this.url = url;
    }

    public String request(Map<String, String> parameterMap) {
        StringBuilder stringBuilder = new StringBuilder();
        String responseBody = null;
        GetMethod method = null;

        try {
            stringBuilder.append(url);
            if (url.indexOf("?") == -1) {
                stringBuilder.append("?");
            }
            Set<String> keySet = parameterMap.keySet();
            Iterator<String> iter = keySet.iterator();
            String parameterKey = null;
            while (iter.hasNext()) {
                parameterKey = iter.next();
                stringBuilder.append(parameterKey);
                stringBuilder.append("=");
                stringBuilder.append(parameterMap.get(parameterKey));
                if (iter.hasNext()) {
                    stringBuilder.append("&");
                }
            }

            String encodedURI = URIUtil.encodeQuery(stringBuilder.toString());

            if (log.isDebugEnabled()) {
                log.debug(encodedURI);
            }

            method = new GetMethod(encodedURI);
            HttpParams httpParams = new DefaultHttpParams();
            DefaultHttpMethodRetryHandler retryHandler = new DefaultHttpMethodRetryHandler(retry, false);
            httpParams.setParameter(HttpMethodParams.RETRY_HANDLER, retryHandler);
            HttpClient httpClient = new HttpClient(new HttpClientParams(httpParams));

            int statusCode = httpClient.executeMethod(method);
            if (log.isDebugEnabled()) {
                stringBuilder = new StringBuilder();
                stringBuilder.append("statusCode: ").append(statusCode);
                log.debug(stringBuilder.toString());
            }
            switch (statusCode) {
            case HttpStatus.SC_OK:
                responseBody = method.getResponseBodyAsString();
                break;
            }
        } catch (Exception e) {
            if (log.isErrorEnabled()) {
                String messageKey = "error.http.request";
                String userMessage = messageSource.getMessage(messageKey, new String[] {}, "default message",
                        Locale.getDefault());
                log.error(userMessage, e);
            }
        } finally {
            if (method != null) {
                method.releaseConnection();
            }
        }
        return responseBody;
    }

    public int getRetry() {
        return retry;
    }

    public void setRetry(int retry) {
        this.retry = retry;
    }

}