001package org.xbib.elasticsearch.rest.action.websocket;
002
003import org.elasticsearch.action.ActionListener;
004import org.elasticsearch.action.delete.DeleteResponse;
005import org.elasticsearch.client.Client;
006import org.elasticsearch.common.inject.Inject;
007import org.elasticsearch.common.settings.Settings;
008import org.elasticsearch.common.xcontent.XContentBuilder;
009import org.elasticsearch.rest.BaseRestHandler;
010import org.elasticsearch.rest.RestChannel;
011import org.elasticsearch.rest.RestController;
012import org.elasticsearch.rest.RestRequest;
013import org.xbib.elasticsearch.rest.XContentRestResponse;
014import org.xbib.elasticsearch.rest.XContentThrowableRestResponse;
015import org.xbib.elasticsearch.action.websocket.pubsub.PubSubIndexName;
016
017import java.io.IOException;
018
019import static org.elasticsearch.rest.RestStatus.BAD_REQUEST;
020import static org.elasticsearch.rest.RestStatus.OK;
021import static org.xbib.elasticsearch.rest.RestXContentBuilder.restContentBuilder;
022
023/**
024 * Unsubscribe action for REST
025 */
026public class RestUnsubscribeAction extends BaseRestHandler {
027
028    private final String pubSubIndexName;
029
030    @Inject
031    public RestUnsubscribeAction(Settings settings, Client client,
032                                 RestController restController) {
033        super(settings, client);
034        this.pubSubIndexName = PubSubIndexName.Conf.indexName(settings);
035        restController.registerHandler(RestRequest.Method.GET, "/_unsubscribe", this);
036        restController.registerHandler(RestRequest.Method.POST, "/_unsubscribe", this);
037    }
038
039    @Override
040    public void handleRequest(final RestRequest request, final RestChannel channel, Client client) {
041        String subscriberId = request.hasParam("subscriber") ? request.param("subscriber") : null;
042        if (subscriberId == null) {
043            try {
044                channel.sendResponse(new XContentThrowableRestResponse(request, new IllegalArgumentException("no subscriber")));
045            } catch (IOException e) {
046                logger.error("error while sending failure response", e);
047            }
048            return;
049        }
050        try {
051            client.prepareDelete(pubSubIndexName, "subscribe", subscriberId)
052                    .execute(new ActionListener<DeleteResponse>() {
053                        @Override
054                        public void onResponse(DeleteResponse response) {
055                            try {
056                                XContentBuilder builder = restContentBuilder(request);
057                                builder.startObject().field("ok", true).field("id", response.getId()).endObject();
058                                channel.sendResponse(new XContentRestResponse(request, OK, builder));
059                            } catch (Exception e) {
060                                onFailure(e);
061                            }
062                        }
063
064                        @Override
065                        public void onFailure(Throwable e) {
066                            try {
067                                logger.error("error while processing unsubscribe request", e);
068                                channel.sendResponse(new XContentThrowableRestResponse(request, e));
069                            } catch (IOException e1) {
070                                logger.error("error while sending error response", e1);
071                            }
072                        }
073                    });
074        } catch (Exception e) {
075            try {
076                XContentBuilder builder = restContentBuilder(request);
077                channel.sendResponse(new XContentRestResponse(request, BAD_REQUEST, builder.startObject().field("error", e.getMessage()).endObject()));
078            } catch (IOException e1) {
079                logger.error("exception while sending exception response", e1);
080            }
081        }
082    }
083
084}