org.venice.piazza.servicecontroller.messaging.handlers.SearchServiceHandler.java Source code

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Here is the source code for org.venice.piazza.servicecontroller.messaging.handlers.SearchServiceHandler.java

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/**
 * Copyright 2016, RadiantBlue Technologies, Inc.
 *
 * 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 org.venice.piazza.servicecontroller.messaging.handlers;

import java.util.List;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.stereotype.Component;
import org.venice.piazza.servicecontroller.data.mongodb.accessors.MongoAccessor;

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;

import model.job.PiazzaJobType;
import model.job.type.SearchServiceJob;
import model.logger.Severity;
import model.service.SearchCriteria;
import model.service.metadata.Service;

import util.PiazzaLogger;

/**
 * Handler for handling search requests.  Searches the databse for 
 * registered services using the name and/or Id provide
 * @author mlynum
 * @version 1.0
 *
 */
@Component
public class SearchServiceHandler implements PiazzaJobHandler {

    @Autowired
    private MongoAccessor accessor;

    @Autowired
    private PiazzaLogger coreLogger;

    private final static Logger LOGGER = LoggerFactory.getLogger(SearchServiceHandler.class);

    /**
     * Handler for the RegisterServiceJob that was submitted. Stores the metadata in MongoDB (non-Javadoc)
     * 
     * @see org.venice.piazza.servicecontroller.messaging.handlers.Handler#handle(model.job.PiazzaJobType)
     */
    @Override
    public ResponseEntity<String> handle(PiazzaJobType jobRequest) {
        SearchServiceJob job = (SearchServiceJob) jobRequest;
        ResponseEntity<String> responseEntity;
        if ((job != null) && (job.data != null)) {
            // Get the criteria to use for the search
            SearchCriteria criteria = job.data;

            coreLogger.log("search " + " " + criteria.field + "->" + criteria.pattern, Severity.INFORMATIONAL);

            ResponseEntity<String> response = handle(criteria);
            responseEntity = new ResponseEntity<>(response.getBody(), response.getStatusCode());
        } else {
            responseEntity = new ResponseEntity<>("Null request received.", HttpStatus.BAD_REQUEST);
        }
        return responseEntity;
    }

    /**
     * 
     * @param criteria
     *            to search. field and regex expression
     * @return a String of ResourceMetadata items that match the search
     */
    public ResponseEntity<String> handle(SearchCriteria criteria) {
        ResponseEntity<String> responseEntity;
        String result;
        if (criteria != null) {
            coreLogger.log("About to search using criteria" + criteria, Severity.INFORMATIONAL);

            List<Service> results = accessor.search(criteria);
            if (results.isEmpty()) {
                coreLogger.log("No results were returned searching for field " + criteria.getField()
                        + " and search criteria " + criteria.getPattern(), Severity.INFORMATIONAL);

                responseEntity = new ResponseEntity<>("No results were returned searching for field",
                        HttpStatus.NO_CONTENT);
            } else {
                ObjectMapper mapper = makeObjectMapper();
                try {
                    result = mapper.writeValueAsString(results);
                    responseEntity = new ResponseEntity<>(result, HttpStatus.OK);
                } catch (JsonProcessingException jpe) {
                    // This should never happen, but still have to catch it
                    LOGGER.error("There was a problem generating the Json response", jpe);
                    coreLogger.log("There was a problem generating the Json response", Severity.ERROR);
                    responseEntity = new ResponseEntity<>("Could not search for services", HttpStatus.NOT_FOUND);
                }
            }
        } else
            responseEntity = new ResponseEntity<>("No criteria was specified", HttpStatus.NO_CONTENT);

        return responseEntity;
    }

    ObjectMapper makeObjectMapper() {
        return new ObjectMapper();
    }
}