ca.sqlpower.dao.json.JSONHttpMessageSender.java Source code

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Here is the source code for ca.sqlpower.dao.json.JSONHttpMessageSender.java

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/*
 * Copyright (c) 2009, SQL Power Group Inc.
 *
 * This file is part of SQL Power Library.
 *
 * SQL Power Library is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * SQL Power Library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>. 
 */

package ca.sqlpower.dao.json;

import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;

import org.apache.http.HttpResponse;
import org.apache.http.StatusLine;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.ResponseHandler;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.methods.HttpUriRequest;
import org.apache.http.entity.StringEntity;
import org.json.JSONArray;
import org.json.JSONObject;

import ca.sqlpower.dao.HttpMessageSender;
import ca.sqlpower.dao.SPPersistenceException;
import ca.sqlpower.enterprise.client.SPServerInfo;

/**
 * An {@link HttpMessageSender} implementation that specifically sends it's
 * message content in the JSON format. (see <a
 * href="http://www.json.org">www.json.org</a>).
 */
public class JSONHttpMessageSender extends HttpMessageSender<JSONObject> {

    private JSONArray messageArray;

    public JSONHttpMessageSender(HttpClient httpClient, SPServerInfo serverInfo, String rootUUID) {
        super(httpClient, serverInfo, rootUUID);
        messageArray = new JSONArray();
    }

    public void send(JSONObject content) throws SPPersistenceException {
        messageArray.put(content);
    }

    public void flush() throws SPPersistenceException {
        try {
            URI serverURI = getServerURI();
            HttpPost postRequest = new HttpPost(serverURI);
            postRequest.setEntity(new StringEntity(messageArray.toString()));
            postRequest.setHeader("Content-Type", "application/json");
            HttpUriRequest request = postRequest;
            getHttpClient().execute(request, new ResponseHandler<Void>() {
                public Void handleResponse(HttpResponse response) throws ClientProtocolException, IOException {
                    StatusLine statusLine = response.getStatusLine();
                    if (statusLine.getStatusCode() >= 400) {
                        throw new ClientProtocolException("HTTP Post request returned an error: " + "Code = "
                                + statusLine.getStatusCode() + ", " + "Reason = " + statusLine.getReasonPhrase());
                    }
                    return null;
                }
            });
        } catch (URISyntaxException e) {
            throw new SPPersistenceException(null, e);
        } catch (ClientProtocolException e) {
            throw new SPPersistenceException(null, e);
        } catch (IOException e) {
            throw new SPPersistenceException(null, e);
        } finally {
            clearMessageArray();
        }
    }

    public void clear() {
        this.clearMessageArray();
    }

    private void clearMessageArray() {
        for (int i = messageArray.length() - 1; i >= 0; i--) {
            messageArray.remove(i);
        }
    }
}