net.spy.memcached.protocol.couch.ViewsFetcherOperationImpl.java Source code

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Here is the source code for net.spy.memcached.protocol.couch.ViewsFetcherOperationImpl.java

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/**
 * Copyright (C) 2009-2011 Couchbase, Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALING
 * IN THE SOFTWARE.
 */

package net.spy.memcached.protocol.couch;

import java.net.HttpURLConnection;
import java.text.ParseException;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;

import net.spy.memcached.ops.OperationErrorType;
import net.spy.memcached.ops.OperationException;
import net.spy.memcached.ops.OperationStatus;

import org.apache.http.HttpRequest;
import org.apache.http.HttpResponse;
import org.codehaus.jettison.json.JSONException;
import org.codehaus.jettison.json.JSONObject;

/**
 * A ViewsOperationImpl.
 */
public class ViewsFetcherOperationImpl extends HttpOperationImpl implements ViewsFetcherOperation {

    private final String bucketName;
    private final String designDocName;

    public ViewsFetcherOperationImpl(HttpRequest r, String bucketName, String designDocName,
            ViewsFetcherCallback viewsCallback) {
        super(r, viewsCallback);
        this.bucketName = bucketName;
        this.designDocName = designDocName;
    }

    @Override
    public void handleResponse(HttpResponse response) {
        String json = getEntityString(response);
        try {
            int errorcode = response.getStatusLine().getStatusCode();
            if (errorcode == HttpURLConnection.HTTP_OK) {
                List<View> views = parseDesignDocumentForViews(bucketName, designDocName, json);
                ((ViewsFetcherCallback) callback).gotData(views);
                callback.receivedStatus(new OperationStatus(true, "OK"));
            } else {
                callback.receivedStatus(new OperationStatus(false, Integer.toString(errorcode)));
            }
        } catch (ParseException e) {
            exception = new OperationException(OperationErrorType.GENERAL, "Error parsing JSON");
        }
        callback.complete();
    }

    private List<View> parseDesignDocumentForViews(String dn, String ddn, String json) throws ParseException {
        List<View> viewList = new LinkedList<View>();
        try {
            JSONObject base = new JSONObject(json);
            if (base.has("error")) {
                return null;
            }
            if (base.has("views")) {
                JSONObject views = base.getJSONObject("views");
                Iterator<?> itr = views.keys();
                while (itr.hasNext()) {
                    String viewname = (String) itr.next();
                    boolean map = views.getJSONObject(viewname).has("map");
                    boolean reduce = views.getJSONObject(viewname).has("reduce");
                    viewList.add(new View(dn, ddn, viewname, map, reduce));
                }
            }
        } catch (JSONException e) {
            throw new ParseException("Cannot read json: " + json, 0);
        }
        return viewList;
    }
}