JAVA Synchronized和Lock实现原理

一、Synchronized实现

try {
            if (!MsOnionRegexUtils.checkDigit(idxStr)) {
                return MsOnionResult.build(MsOnionStatusConstants.STATUS_400, MessageConstants.MESSAGE_PARAMETER_ILLEGAL + ", idxStr=" + idxStr);
            }
            if (!MsOnionRegexUtils.isNumeric(statusStr)) {
                return MsOnionResult.build(MsOnionStatusConstants.STATUS_400,
                        MessageConstants.MESSAGE_PARAMETER_ILLEGAL + ", statusStr=" + statusStr);
            }
            idx = Long.parseLong(idxStr);
            status = Short.parseShort(statusStr);

            // 查询仓库是否关联商品，不能删除
            CollectorItemExample example = new CollectorItemExample();
            CollectorItemExample.Criteria criteria = example.createCriteria();
            criteria.andWarehouseTypeIdxEqualTo(idx);
            List<CollectorItem> list = itemService.queryByExample(msOnionApiVersion, example);
            if (MsOnionCollectionUtils.isNotEmpty(list)) {
                return MsOnionResult.build(MsOnionStatusConstants.STATUS_400, "仓库已关联商品，不能删除");
            }
            int result = warehouseTypeService.updateStatus(msOnionApiVersion, idx, status);
            if (result > 0) {
                return MsOnionResult.ok();
            }
            return MsOnionResult.build(MsOnionStatusConstants.STATUS_400, MessageConstants.MESSAGE_SERVER_ERROR);

        } catch (MsOnionIllegalArgumentException e) {
            return MsOnionResult.build(MsOnionStatusConstants.STATUS_400, MessageConstants.MESSAGE_PARAMETER_ILLEGAL);
        } catch (MsOnionException e) {
            return MsOnionResult.build(MsOnionStatusConstants.STATUS_500, MessageConstants.MESSAGE_SERVER_ERROR);
        }

 

1

try {

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            if (!MsOnionRegexUtils.checkDigit(idxStr)) {

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                return MsOnionResult.build(MsOnionStatusConstants.STATUS_400, MessageConstants.MESSAGE_PARAMETER_ILLEGAL + ", idxStr=" + idxStr);

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            }

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            if (!MsOnionRegexUtils.isNumeric(statusStr)) {

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                return MsOnionResult.build(MsOnionStatusConstants.STATUS_400,

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                        MessageConstants.MESSAGE_PARAMETER_ILLEGAL + ", statusStr=" + statusStr);

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            }

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            idx = Long.parseLong(idxStr);

10

            status = Short.parseShort(statusStr);

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            // 查询仓库是否关联商品，不能删除

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            CollectorItemExample example = new CollectorItemExample();

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            CollectorItemExample.Criteria criteria = example.createCriteria();

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            criteria.andWarehouseTypeIdxEqualTo(idx);

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            List<CollectorItem> list = itemService.queryByExample(msOnionApiVersion, example);

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            if (MsOnionCollectionUtils.isNotEmpty(list)) {

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                return MsOnionResult.build(MsOnionStatusConstants.STATUS_400, "仓库已关联商品，不能删除");

19

            }

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            int result = warehouseTypeService.updateStatus(msOnionApiVersion, idx, status);

21

            if (result > 0) {

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                return MsOnionResult.ok();

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            }

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            return MsOnionResult.build(MsOnionStatusConstants.STATUS_400, MessageConstants.MESSAGE_SERVER_ERROR);

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        } catch (MsOnionIllegalArgumentException e) {

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            return MsOnionResult.build(MsOnionStatusConstants.STATUS_400, MessageConstants.MESSAGE_PARAMETER_ILLEGAL);

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        } catch (MsOnionException e) {

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            return MsOnionResult.build(MsOnionStatusConstants.STATUS_500, MessageConstants.MESSAGE_SERVER_ERROR);

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        }

来自为知笔记(Wiz)