CirmStatisticsParser.java

/*******************************************************************************
 * Copyright 2014 Miami-Dade County
 * 
 * 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.sharegov.cirm.stats;

import java.util.Date;
import java.util.Map;
import mjson.Json;
import org.sharegov.cirm.utils.GenUtilsMod;

/**
 * Parses CirmStatistics Json.
 * 
 * @author Thomas Hilpold
 */
public class CirmStatisticsParser {
    
    /**
     * Parses an array of Json objects like below into a CirmStatistics object
     * (Empty array allowed)
     * {
        LegacyEmulator/create/legacy:311DUMP: {
        lastSuccessTime: "2014-07-03T15:55:55.129-0400",
        lastFailureException: null,
        failureCount: 0,
        lastFailureId: null,
        lastFailureTime: null,
        successCount: 5,
        lastFailureMessage: null,
        firstEntryTime: "2014-07-03T09:46:55.023-0400",
        lastSuccessId: "14-10409192"
        }
        },
     * @param cirmStatisticsJson an array of statsKey Strings / Sta
     * @return 
     * @throws all sorts of exceptions and fails easily, so try for it.
     */
    public CirmStatistics read(Json cirmStatisticsJson) {
        CirmStatistics stats = new CirmStatistics();
        int counter = 0;
        for (Json statsKeyValObject : cirmStatisticsJson.asJsonList()) {
            Map.Entry<String, Json> statsKeyValObjectEntry = statsKeyValObject.asJsonMap().entrySet().iterator().next();
            String keyAsString = statsKeyValObjectEntry.getKey();
            String[] componentActionType = parseStatsKeyFromString(keyAsString);
            //parse statsvalue
            CirmStatistics.StatsValue v = stats.getEntry(componentActionType[0], componentActionType[1], componentActionType[2]);            
            Json valObject = statsKeyValObjectEntry.getValue();
            parseStatsValue(valObject, v);            
            counter ++;
        }
        System.out.println("read CirmStatisticsJson read " + counter + " keys and values");
        return stats;
    }
    
    /**
     * Mandatory with a proper value are:
     * firstEntryTime
     * successCount
     * failureCount
     * 
     * All others' keys must be there, but value will be set to null if non string value (e.g.null)
     * @param statsValObject
     * @param statsValue 
     */
    public void parseStatsValue(Json statsValObject, CirmStatistics.StatsValue statsValue) {
        Date fet = GenUtilsMod.parseDate(statsValObject.at("firstEntryTime").asString());
        statsValue.setFirstEntryTime(fet);
        Date lst = statsValObject.at("lastSuccessTime").isString()? GenUtilsMod.parseDate(statsValObject.at("lastSuccessTime").asString()) : null;
        statsValue.setLastSuccessTime(lst);
        Date lft = statsValObject.at("lastFailureTime").isString()? GenUtilsMod.parseDate(statsValObject.at("lastFailureTime").asString()) : null;
        statsValue.setLastFailureTime(lft);
        statsValue.setSuccessCount(statsValObject.at("successCount").asLong());
        statsValue.setLastSuccessId(statsValObject.at("lastSuccessId").isString()? statsValObject.at("lastSuccessId").asString() : null);
        statsValue.setFailureCount(statsValObject.at("failureCount").asLong());
        statsValue.setLastFailureException(statsValObject.at("lastFailureException").isString()? statsValObject.at("lastFailureException").asString() : null);
        statsValue.setLastFailureId(statsValObject.at("lastFailureId").isString()? statsValObject.at("lastFailureId").asString() : null);
        statsValue.setLastFailureMessage(statsValObject.at("lastFailureMessage").isString()? statsValObject.at("lastFailureMessage").asString() : null);
    }
    
    /**
     * parses a key as string expected as follows: component/action/type
     * it will fail, if no two slashes are there.
     * 
     * @param statsKeyString
     * @return 
     */
    public String[] parseStatsKeyFromString(String statsKeyString) {
        String [] componentActionType = new String[3];
        //find the first / starting before first char
        int componentEnd = statsKeyString.indexOf('/');
        //component
        componentActionType[0] = statsKeyString.substring(0, componentEnd);
        statsKeyString = statsKeyString.substring(componentEnd + 1);
        //action
        int actionEnd = statsKeyString.indexOf('/');
        componentActionType[1] = statsKeyString.substring(0, actionEnd);
        statsKeyString = statsKeyString.substring(actionEnd + 1);
        //type
        componentActionType[2] = statsKeyString;
        return componentActionType;
    }
}