标签：ati java lambda event tom 分享 led lis not
之前，调用第3方服务，每个方法都差不多“长”这样, 写起来啰嗦, 改起来麻烦, 还容易改漏。
public void authorizeRoleToUser(Long userId, List<Long> roleIds) {
try {
power.authorizeRoleToUser(userId, roleIds);
} catch (MotanCustomException ex) {
if (ex.getCode().equals(MSUserException.notLogin().getCode()))
throw UserException.notLogin();
if (ex.getCode().equals(MSPowerException.haveNoPower().getCode()))
throw PowerException.haveNoPower();
throw ex;
} catch (MotanServiceException ex) {
CatHelper.logEventService("Power-authorizeRoleToUser", "authorizeRoleToUser", ex.getStatus(),
ex.getErrorCode(), ex.getMessage());
throw ex;
} catch (MotanAbstractException ex) {
CatHelper.logEventService("Power-authorizeRoleToUser", "authorizeRoleToUser", ex.getStatus(),
ex.getErrorCode(), ex.getMessage());
throw ex;
} catch (Exception ex) {
CatHelper.logError(ex);
throw ex;
}
}
我经过学习和提取封装, 将try ... catch ... catch .. 提取为公用, 得到这2个方法:
import java.util.function.Supplier;
public static <T> T tryCatch(Supplier<T> supplier, String serviceName, String methodName) {
try {
return supplier.get();
} catch (MotanCustomException ex) {
if (ex.getCode().equals(MSUserException.notLogin().getCode()))
throw UserException.notLogin();
if (ex.getCode().equals(MSPowerException.haveNoPower().getCode()))
throw PowerException.haveNoPower();
throw ex;
} catch (MotanServiceException ex) {
CatHelper.logEventService(serviceName + "-" + methodName, methodName, ex.getStatus(), ex.getErrorCode(),
ex.getMessage());
throw ex;
} catch (MotanAbstractException ex) {
CatHelper.logEventService(serviceName + "-" + methodName, methodName, ex.getStatus(), ex.getErrorCode(),
ex.getMessage());
throw ex;
} catch (Exception ex) {
CatHelper.logError(ex);
throw ex;
}
}
public static void tryCatch(Runnable runnable, String serviceName, String methodName) {
tryCatch(() -> {
runnable.run();
return null;
}, serviceName, methodName);
}
现在用起来是如此简洁。像这种无返回值的:
public void authorizeRoleToUser(Long userId, List<Long> roleIds) {
tryCatch(() -> { power.authorizeRoleToUser(userId, roleIds); }, "Power", "authorizeRoleToUser");
}
还有这种有返回值的:
public List<RoleDTO> listRoleByUser(Long userId) {
return tryCatch(() -> power.listRoleByUser(userId), "Power", "listRoleByUser");
}
这是我的第一篇Java文章。学习Java的过程中，既有惊喜，也有失望。以后会继续来分享心得。
标签：ati java lambda event tom 分享 led lis not
原文地址：http://www.cnblogs.com/BillySir/p/7494090.html
