ポリシーモードを使用して、コードのIf elseIfとSwitch Caseの問題を解決します.
13827 ワード
ポリシーモード+ファクトリメソッドは、複数のif elseの代わりにマルチブランチ操作またはSwitch Caseの場合を実現する.
ポリシー+ファクトリ・モードの最適化:
列挙クラス:
ポリシーインタフェース:
ポリシー実装クラス:
工場クラス:
クライアントクラス(ユニットテスト例):
上のコードから、ポリシーモードは具体的なアルゴリズムを具体的なポリシーロールの内部にカプセル化し、拡張性を強化し、実現の詳細を隠していることがわかります.継承の代わりに実装され、if-elseというメンテナンスしにくい条件文を回避します.もちろん、ポリシーモードは独立したポリシー実装のため、システム内に多くのポリシークラスが増加していることも見ることができます.クライアントにとって、ドライブの特定のポリシーと、特定のポリシーを選択する条件を知る必要があります.
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
/**
*
*
*/
@Service
public class CommonSyncService implements ICommonSyncService{
/** */
private static final Logger LOGGER = LoggerFactory.getLogger(CommonSyncService.class);
/** base_bdm service */
@Autowired
private IBaseBdmService baseBdmService;
/** base_dad service */
@Autowired
private IBaseDadService baseDadService;
/** base_net service */
@Autowired
private IBaseNetService baseNetService;
/** base_sys service */
@Autowired
private IBaseSysService baseSysService;
/** product service */
@Autowired
private IProductService productService;
/** wms service */
@Autowired
private IWmsService wmsService;
/** user service */
@Autowired
private IUserSysEmployeeService userSysEmployeeService;
/** route service */
@Autowired
private IRouteService routeService;
/**
* -
*
* @param tableName
* @param lastTime
* @param startIndex
* @param pageSize
* @param cdstatus comp_code( , all)
* @return
*/
public SyncServerResult commonCallSyncService(String tableName ,String lastTime,
int startIndex, int pageSize,String cdstatus){
SyncServerResult result = null;
// service
switch (tableName) {
case Constants.TableConstants.BASE_NET_DEPT_BASE_INFO:
/**
* hanyg
* base_net_dept_base_info
*/
result = baseNetService.getDeptBaseInfoSyncServerData(tableName,lastTime, startIndex, pageSize, cdstatus);
break;
case Constants.TableConstants.BASE_BDM_QC_TYPE:
/**
* hanyg
* base_bdm_qc_type
*/
result = baseBdmService.getQcTypeSyncServerData(tableName,lastTime, startIndex, pageSize, cdstatus);
break;
case Constants.TableConstants.BASE_SYS_COMPANY:
/**
* base_sys_company
*/
result = baseSysService.getSyncSysCompanyServerData(tableName,lastTime, startIndex, pageSize, cdstatus);
break;
case Constants.TableConstants.BASE_NET_DISTRICT:
/**
* base_net_district
*/
result = baseNetService.getSyncNetDistrictServerData(tableName,lastTime, startIndex, pageSize, cdstatus);
break;
case Constants.TableConstants.BASE_BDM_FORWARD_ZONE:
/**
* base_bdm_forward_zone
*/
result = baseBdmService.getForwardZoneSyncData(tableName,lastTime, startIndex, pageSize, cdstatus);
break;
case Constants.TableConstants.BASE_DAD_DICTIONARY_VALUE:
/**
* base_dad_dictionary_value
*/
result = baseDadService.getDictionarySyncData(tableName,lastTime, startIndex, pageSize, cdstatus);
break;
case Constants.TableConstants.BASE_BDM_PRODUCT_TYPE:
/**
* base_bdm_product_type
*/
result = baseBdmService.getProductTypeSyncData(tableName,lastTime, startIndex, pageSize, cdstatus);
break;
case Constants.TableConstants.BASE_BDM_PRODUCT_TYPE_APPLY:
/**
* base_bdm_product_type_apply
*/
result = baseBdmService.getProductTypeApplySyncData(tableName,lastTime, startIndex, pageSize, cdstatus);
break;
case Constants.TableConstants.BASE_BDM_PRINT_CONFIG:
/**
* ( )base_bdm_print_config
*/
result = baseBdmService.getPrintConfigSyncServerData(tableName ,lastTime, startIndex, pageSize, cdstatus);
break;
case Constants.TableConstants.BASE_BDM_WEIGHT_VOLUMN_RATIO:
/**
* ( )base_bdm_weight_volumn_ratio
*/
result = baseBdmService.getWeightVolumnRatioSyncServerData(tableName, lastTime, startIndex, pageSize, cdstatus);
break;
case Constants.TableConstants.BASE_DAD_DICTIONARY_CONFIG_VALUE:
/**
* ( )base_dad_dictionary_config_value
*/
result = baseBdmService.getDictConfValSyncServerData(tableName, lastTime, startIndex, pageSize, cdstatus);
break;
case Constants.TableConstants.BASE_EACH_COMPANY:
/**
* ( )base_each_company
*/
result = baseBdmService.getEachCompanySyncServerData(tableName, lastTime, startIndex, pageSize, cdstatus);
break;
case Constants.TableConstants.PRODUCT_PRO_MANAGE:
/**
* ( )product_pro_manage
*/
result = productService.getProManageSyncServerData(tableName, lastTime, startIndex, pageSize, cdstatus);
break;
case Constants.TableConstants.PRODUCT_LINE_MAINTENANCE:
/**
* ( )product_line_maintenance
*/
result = productService.getProLineSyncServerData(tableName, lastTime, startIndex, pageSize, cdstatus);
break;
case Constants.TableConstants.PRODUCT_SAL_SERVICE_FEE:
/**
* ( )product_sal_service_fee
*/
result = productService.getProSalFeeSyncServerData(tableName, lastTime, startIndex, pageSize, cdstatus);
break;
case Constants.TableConstants.PRODUCT_SAL_SERVICE_ZONE:
/**
* ( )product_sal_service_zone
*/
result = productService.getProSalZoneSyncServerData(tableName, lastTime, startIndex, pageSize, cdstatus);
break;
case Constants.TableConstants.PRODUCT_SAL_SPECIAL_GOODS:
/**
* ( )product_sal_special_goods
*/
result = productService.getProSalGoodsSyncServerData(tableName, lastTime, startIndex, pageSize, cdstatus);
break;
case Constants.TableConstants.ROUTE_LINE_CODE:
/**
* ( )route_line_code
*/
result = routeService.queryRouteLineCodeByparameter(tableName, lastTime, startIndex, pageSize, cdstatus);
break;
case Constants.TableConstants.ROUTE_LINE:
/**
* route_line
*/
result = routeService.queryRouteLineByparameter(tableName, lastTime, startIndex, pageSize, cdstatus);
break;
case Constants.TableConstants.USER_SYS_EMPLOYEE:
/**
* (user_sys_employee)
*/
result = userSysEmployeeService.queryUserSysEmployeeByparameter(tableName, lastTime, startIndex, pageSize, cdstatus);
break;
case Constants.TableConstants.WMS_STORAGE:
/**
* ( )wms_storage
*/
result = wmsService.queryWmsStorageByparameter(tableName, lastTime, startIndex, pageSize, cdstatus);
break;
case Constants.TableConstants.WMS_STORAGE_DETAIL:
/**
* ( )wms_storage_detail
*/
result = wmsService.queryWmsStorageDetailByparameter(tableName, lastTime, startIndex, pageSize, cdstatus);
break;
default:
LOGGER.error("APP {} !",tableName);
}
return result;
}
}
ポリシー+ファクトリ・モードの最適化:
列挙クラス:
import org.apache.commons.lang3.StringUtils;
/**
* ( )
*
*
* @author 000125
*
*/
public enum StrategyTypeEnum {
BASE_NET_DEPT_BASE_INFO("base_net_dept_base_info", "BaseNetDeptBaseInfoStrategy", " "),
BASE_BDM_QC_TYPE("base_bdm_qc_type", "BaseBdmQcTypeStrategy", " "),
BASE_SYS_COMPANY("base_sys_company", "BaseSysCompanyStrategy", " "),
BASE_NET_DISTRICT("base_net_district", "BaseNetDistrictStrategy", " "),
BASE_BDM_FORWARD_ZONE("base_bdm_forward_zone", "BaseBdmForwardZoneStrategy", " "),
BASE_DAD_DICTIONARY_VALUE("base_dad_dictionary_value", "BaseDadDictionaryValueStrategy", " "),
BASE_DAD_DICTIONARY_CONFIG_VALUE("base_dad_dictionary_config_value", "BaseDadDictionaryConfigValueStrategy", " "),
BASE_BDM_PRODUCT_TYPE("base_bdm_product_type", "BaseBdmProductTypeStrategy"," "),
BASE_BDM_PRODUCT_TYPE_APPLY("base_bdm_product_type_apply", "BaseBdmProductTypeApplyStrategy", " "),
BASE_BDM_PRINT_CONFIG("base_bdm_print_config", "BaseBdmPrintConfigStrategy", " "),
BASE_BDM_WEIGHT_VOLUMN_RATIO("base_bdm_weight_volumn_ratio", "BaseBdmWeightVolumnRatioStrategy", " "),
BASE_EACH_COMPANY("base_each_company", "BaseEachCompanyStrategy", " "),
PRODUCT_PRO_MANAGE("product_pro_manage", "ProductProManageStrategy", " "),
PRODUCT_LINE_MAINTENANCE("product_line_maintenance", "ProductLineMaintenanceStrategy", " "),
PRODUCT_SAL_SERVICE_FEE("product_sal_service_fee", "ProductSalServiceFeeStrategy", " "),
PRODUCT_SAL_SERVICE_ZONE("product_sal_service_zone", "ProductSalServiceZoneStrategy", " "),
PRODUCT_SAL_SPECIAL_GOODS("product_sal_special_good", "ProductSalSpecialGoodStrategy", " "),
ROUTE_LINE_CODE("route_line_code", "RoutLineCodeStrategy", " "),
ROUTE_LINE("route_line", "RouteLineStrategy", " "),
USER_SYS_EMPLOYEE("user_sys_employee", "UserSysEmployeeStrategy", " "),
WMS_STORAGE("wms_storage", "WmsStorageDetailStrategy", " "),
WMS_STORAGE_DETAIL("wms_storage_detail", "WmsStorageStrategy", " "),
NOT_EXITS_ENUM("", "", "");
/**
* ，
*/
private String code;
/**
* ，
*/
private String value;
/**
*
*/
private String description;
private StrategyTypeEnum(String code, String value, String description) {
this.code = code;
this.value = value;
this.description = description;
}
public String getCode(){
return this.code;
}
public String getValue(){
return this.value;
}
public String getDescription(){
return this.description;
}
public static StrategyTypeEnum getByCode(String code) {
if (StringUtils.isBlank(code)) {
return StrategyTypeEnum.NOT_EXITS_ENUM;
}
for(StrategyTypeEnum type : StrategyTypeEnum.values()) {
if(type.getCode().equals(code)) {
return type;
}
}
return null;
}
public static StrategyTypeEnum getByValue(String value) {
if (StringUtils.isBlank(value)) {
return StrategyTypeEnum.NOT_EXITS_ENUM;
}
for(StrategyTypeEnum type : StrategyTypeEnum.values()) {
if(type.getValue().equals(value)) {
return type;
}
}
return null;
}
}
ポリシーインタフェース:
/**
*
* ，
* +
*
*
* @author 000125
*
*/
public interface SyncStrategy {
/**
* ，
*
* @param tableName -
* @param lastTime - ，
* @param startIndex -
* @param pageSize -
* @param cdstatus - comp_code( , all)
* @return
*/
public Object doOperate(String tableName, String lastTime, int startIndex, int pageSize, String cdstatus);
}
ポリシー実装クラス:
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* ， （ ）
*
* @author 000125
*
*/
public class BaseBdmForwardZoneStrategy implements SyncStrategy {
/** */
private static final Logger LOGGER = LoggerFactory.getLogger(BaseBdmForwardZoneStrategy.class);
/**
* base_bdm_forward_zone
*/
@Override
public Object doOperate(String tableName, String lastTime, int startIndex, int pageSize, String cdstatus) {
// TODO
IBaseBdmService baseBdmService = SpringContextUtil.getBean("baseBdmServiceImpl", BaseBdmServiceImpl.class);
if (baseBdmService == null){
LOGGER.error(" Spring Bean ！");
return null;
}
return baseBdmService.getForwardZoneSyncData(tableName, lastTime, startIndex, pageSize, cdstatus);
}
}
工場クラス:
import org.apache.commons.lang3.StringUtils;
/**
*
*
* @author 000125
*
*/
public class StrategyFactory {
private StrategyFactory() {
}
public static SyncStrategy getStrategy(String code){
String clazzPrefix = "com.appsync.core.gof.strategy.impl.";
String clazzName = StrategyTypeEnum.getByCode(code).getValue();
SyncStrategy strategy = null;
if (StringUtils.isNotBlank(clazzName)) {
try {
//
strategy = (SyncStrategy) Class.forName(clazzPrefix + clazzName).newInstance();
} catch (Exception e) {
e.printStackTrace();
System.out.println(" ");
}
}
return strategy;
}
}
クライアントクラス(ユニットテスト例):
public class BaseTest extends SpringTestCase{
@Test
public void queryPrintConfigSql(){
String tableName="base_bdm_forward_zone",
lastTime="2018-01-10 00:00:00",
cdstatus="all";
int startIndex=1; int pageSize=10;
try {
HystrixRequestContext.initializeContext();
//
SyncServerResult result = SyncStrategyFacade.sync(tableName, lastTime, startIndex, pageSize, cdstatus);
String jsonResult = JSONObject.toJSONString(result);
System.out.println("jsonResult="+jsonResult);
} catch (Exception e) {
e.printStackTrace();
}
}
}
上のコードから、ポリシーモードは具体的なアルゴリズムを具体的なポリシーロールの内部にカプセル化し、拡張性を強化し、実現の詳細を隠していることがわかります.継承の代わりに実装され、if-elseというメンテナンスしにくい条件文を回避します.もちろん、ポリシーモードは独立したポリシー実装のため、システム内に多くのポリシークラスが増加していることも見ることができます.クライアントにとって、ドライブの特定のポリシーと、特定のポリシーを選択する条件を知る必要があります.