ShowRestHandler.java

package com.cadrlife.devsearch.esplugin;

import com.cadrlife.devsearch.esplugin.service.ShowResource;
import com.fasterxml.jackson.databind.ObjectMapper;

import org.elasticsearch.client.Client;
import org.elasticsearch.common.base.Strings;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.rest.*;

import static org.elasticsearch.rest.RestRequest.Method.GET;
import static org.elasticsearch.rest.RestStatus.OK;

public class ShowRestHandler extends BaseRestHandler {
    private final ShowResource showResource;
    private final ObjectMapper objectMapper;

    @Inject
    public ShowRestHandler(Settings settings, Client client, RestController restController, ShowResource showResource, ObjectMapper objectMapper) {
        super(settings, client);
        this.showResource = showResource;
        this.objectMapper = objectMapper;
        restController.registerHandler(GET, "/_dev-search/showDoc", this);
        restController.registerHandler(GET, "/_dev-search/showProject", this);
    }

    @Override
    public void handleRequest(final RestRequest request, final RestChannel channel) {
        String repo = request.param("repo");
        String project = request.param("project");
        String path = request.param("path");
        if (Strings.isNullOrEmpty(repo)) {
            channel.sendResponse(new BytesRestResponse(RestStatus.BAD_REQUEST, "Parameter repo required"));
        } else if (Strings.isNullOrEmpty(project)) {
            channel.sendResponse(new BytesRestResponse(RestStatus.BAD_REQUEST, "Parameter project required"));
        } else {
            try {
                channel.sendResponse(new BytesRestResponse(OK, objectMapper.writeValueAsString(showResource.get(repo, project, path))));
            } catch (Exception e) {
                logger.error("Failed for '{}', '{}', '{}'", e, repo, project, path);
                channel.sendResponse(new BytesRestResponse(RestStatus.INTERNAL_SERVER_ERROR, e.getMessage()));
            }
        }
    }
}