de.xwic.appkit.core.remote.client.URemoteAccessClient.java Source code

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Here is the source code for de.xwic.appkit.core.remote.client.URemoteAccessClient.java

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/*******************************************************************************
 * Copyright 2015 xWic group (http://www.xwic.de)
 *
 * 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.
 *  
 *******************************************************************************/
/**
 *
 */
package de.xwic.appkit.core.remote.client;

import java.io.BufferedReader;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.nio.charset.Charset;
import java.util.Map;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.mime.MultipartEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.util.EntityUtils;
import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.io.SAXReader;

/**
 * @author Alexandru Bledea
 * @since Jan 14, 2014
 */
public final class URemoteAccessClient {

    private final static Log log = LogFactory.getLog(URemoteAccessClient.class);

    /**
     *
     */
    private URemoteAccessClient() {
    }

    /**
     * @param param
     * @param config
     * @return
     */
    public static Document postRequest(final Map<String, String> param, final RemoteSystemConfiguration config) {
        BufferedReader rd = null;

        byte[] bytes = null;

        try {
            bytes = getReponseByteArray(param, config);
            rd = new BufferedReader(
                    new InputStreamReader(new ByteArrayInputStream(bytes), Charset.forName("UTF-8")));
            return new SAXReader().read(rd);
        } catch (RemoteDataAccessException rdae) {
            throw rdae;
        } catch (final DocumentException de) {
            if (null != bytes) {
                log.error(String.format("Failed to transfer \n---\n%s\n---\n", new String(bytes)), de);
            }
            throw new RemoteDataAccessException("Transfer error", de);
        } catch (Exception e) {
            throw new RemoteDataAccessException("Transfer error", e);
        } finally {
            IoUtil.close(rd);
        }
    }

    /**
     * @param param
     * @param config
     * @return
     */
    public static byte[] getReponseByteArray(final Map<String, String> param,
            final RemoteSystemConfiguration config) {
        try {
            SimpleRequestHelper requestHelper = new SimpleRequestHelper(param, config);
            return postRequest(requestHelper, config);
        } catch (RemoteDataAccessException rdae) {
            throw rdae;
        } catch (Exception e) {
            throw new RemoteDataAccessException(e);
        }
    }

    /**
     * @param builder
     * @param config
     * @return
     */
    public static int multipartRequestInt(final MultipartEntity builder, final RemoteSystemConfiguration config) {
        try {
            MultipartRequestHelper requestHelper = new MultipartRequestHelper(builder, config);
            byte[] byteArray = postRequest(requestHelper, config);
            return Integer.valueOf(new String(byteArray));
        } catch (RemoteDataAccessException rdae) {
            throw rdae;
        } catch (Exception e) {
            throw new RemoteDataAccessException(e);
        }
    }

    /**
     * @param param
     * @param config
     * @return
     */
    public static byte[] postRequest(final IRequestHelper helper, final RemoteSystemConfiguration config) {
        CloseableHttpResponse response = null;
        try {

            CloseableHttpClient client = PoolingHttpConnectionManager.getInstance().getClientInstance(config);
            HttpPost post = new HttpPost(helper.getTargetUrl());
            post.setEntity(helper.getHttpEntity());

            response = client.execute(post);

            int responseCode = response.getStatusLine().getStatusCode();
            if (responseCode != HttpURLConnection.HTTP_OK) {
                throw new RemoteDataAccessException(response.getStatusLine().getReasonPhrase());
            }
            return EntityUtils.toByteArray(response.getEntity());
        } catch (RemoteDataAccessException re) {
            throw re;
        } catch (Exception e) {
            throw new RemoteDataAccessException(e);
        } finally {
            if (response != null) {
                try {
                    response.close();
                } catch (IOException e) {
                    log.error(e.getMessage(), e);
                }
            }
        }
    }

}