SpringController.md

controller

1 get 的controller采用的同步方法，返回ResponseEntity，比如kernel中的controller

@RequestMapping(value = "/detail", method = RequestMethod.GET)
@ResponseBody
public ResponseEntity getApplications() {
    try {
        List<XApplication> appList = xApplicationsService.getFullAppList();

        XASIList xasiList = new XASIList(appList);
        return ResponseEntity.ok(xasiList);
    } catch (Exception e) {
        logger.error("get application detail error, cause : {}", e);
        return ResponseEntity.status(HttpStatus.NOT_FOUND).body("get app detail error.");
    }
}

2 post 的controller采用的异步方法，返回 DeferredResult<ResponseEntity<?>>，比如Phoenixolap和collector中的controller

@RequestMapping(value = "/api/v1/statistic/db", method = POST)
@ResponseStatus(HttpStatus.ACCEPTED)
public DeferredResult<ResponseEntity<?>> receiveDbStatistics(@RequestBody byte[] body) {
    DeferredResult<ResponseEntity<?>> result = new DeferredResult<>();
    try {
        DBStatistic statistic = new Gson().fromJson(new String(body, "UTF-8"), DBStatistic.class);

        xLogger.log("receive db  statistic :" + statistic);

        List<String> sqls = new UpsertDbStatisticTableAction().buildSql(statistic);

        if (!CollectionUtils.isEmpty(sqls)) {
            PhoenixDBUtil.store(sqls);
        }
    } catch (Exception e) {
        xLogger.error("receive db statistic error {}", e);

        result.setResult(ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body(""));

        return result;
    }

    result.setResult(SUCCESS);

    return result;
}