Spring\u4e2d\u7684\u4e8b\u52a1\u7ba1\u7406\u5b9e\u4f8b\u8be6\u89e3<\/a><\/em><\/p>\n\n\n\n\u9996\u5148\u662f\u6570\u636e\u5e93\u8868<\/strong>\u00a0book(isbn, book_name, price)\u00a0account(username, balance)\u00a0book_stock(isbn, stock)<\/p>\n\n\n\n\u7136\u540e\u662fXML\u914d\u7f6e<\/strong><\/p>\n\n\n\n<beans xmlns=\"http:\/\/www.springframework.org\/schema\/beans\"\nxmlns:xsi=\"http:\/\/www.w3.org\/2001\/XMLSchema-instance\"\nxmlns:context=\"http:\/\/www.springframework.org\/schema\/context\"\nxmlns:aop=\"http:\/\/www.springframework.org\/schema\/aop\"\nxmlns:tx=\"http:\/\/www.springframework.org\/schema\/tx\"\nxsi:schemaLocation=\"http:\/\/www.springframework.org\/schema\/beans\nhttp:\/\/www.springframework.org\/schema\/beans\/spring-beans-3.0.xsd\nhttp:\/\/www.springframework.org\/schema\/context\nhttp:\/\/www.springframework.org\/schema\/context\/spring-context-3.0.xsd\nhttp:\/\/www.springframework.org\/schema\/aop http:\/\/www.springframework.org\/schema\/aop\/spring-aop-2.5.xsd\nhttp:\/\/www.springframework.org\/schema\/tx http:\/\/www.springframework.org\/schema\/tx\/spring-tx-2.5.xsd\">\n\n <import resource=\"applicationContext-db.xml\" \/>\n\n <context:component-scan\n base-package=\"com.springinaction.transaction\">\n <\/context:component-scan>\n\n <tx:annotation-driven transaction-manager=\"txManager\"\/>\n\n <bean id=\"transactionManager\" class=\"org.springframework.jdbc.datasource.DataSourceTransactionManager\">\n <property name=\"dataSource\" ref=\"dataSource\" \/>\n <\/bean>\n\n<\/beans><\/code><\/pre>\n\n\n\n\u4f7f\u7528\u7684\u7c7b<\/strong>\u00a0BookShopDao<\/p>\n\n\n\npackage com.springinaction.transaction;\n\npublic interface BookShopDao {\n \/\/ \u6839\u636e\u4e66\u53f7\u83b7\u53d6\u4e66\u7684\u5355\u4ef7\n public int findBookPriceByIsbn(String isbn);\n \/\/ \u66f4\u65b0\u4e66\u7684\u5e93\u5b58\uff0c\u4f7f\u4e66\u53f7\u5bf9\u5e94\u7684\u5e93\u5b58-1\n public void updateBookStock(String isbn);\n \/\/ \u66f4\u65b0\u7528\u6237\u7684\u8d26\u6237\u4f59\u989d\uff1aaccount\u7684balance-price\n public void updateUserAccount(String username, int price);\n}<\/code><\/pre>\n\n\n\nBookShopDaoImpl<\/p>\n\n\n\n
package com.springinaction.transaction;\n\nimport org.springframework.beans.factory.annotation.Autowired;\nimport org.springframework.jdbc.core.JdbcTemplate;\nimport org.springframework.stereotype.Repository;\n\n@Repository(\"bookShopDao\")\npublic class BookShopDaoImpl implements BookShopDao {\n\n @Autowired\n private JdbcTemplate JdbcTemplate;\n\n @Override\n public int findBookPriceByIsbn(String isbn) {\n String sql = \"SELECT price FROM book WHERE isbn = ?\";\n\n return JdbcTemplate.queryForObject(sql, Integer.class, isbn);\n }\n\n @Override\n public void updateBookStock(String isbn) {\n \/\/\u68c0\u67e5\u4e66\u7684\u5e93\u5b58\u662f\u5426\u8db3\u591f\uff0c\u82e5\u4e0d\u591f\uff0c\u5219\u629b\u51fa\u5f02\u5e38\n String sql2 = \"SELECT stock FROM book_stock WHERE isbn = ?\";\n int stock = JdbcTemplate.queryForObject(sql2, Integer.class, isbn);\n if (stock == 0) {\n throw new BookStockException(\"\u5e93\u5b58\u4e0d\u8db3\uff01\");\n }\n String sql = \"UPDATE book_stock SET stock = stock - 1 WHERE isbn = ?\";\n JdbcTemplate.update(sql, isbn);\n }\n\n @Override\n public void updateUserAccount(String username, int price) {\n \/\/\u68c0\u67e5\u4f59\u989d\u662f\u5426\u4e0d\u8db3\uff0c\u82e5\u4e0d\u8db3\uff0c\u5219\u629b\u51fa\u5f02\u5e38\n String sql2 = \"SELECT balance FROM account WHERE username = ?\";\n int balance = JdbcTemplate.queryForObject(sql2, Integer.class, username);\n if (balance < price) {\n throw new UserAccountException(\"\u4f59\u989d\u4e0d\u8db3\uff01\");\n }\n String sql = \"UPDATE account SET balance = balance - ? WHERE username = ?\";\n JdbcTemplate.update(sql, price, username);\n }\n\n}<\/code><\/pre>\n\n\n\nBookShopService<\/p>\n\n\n\n
package com.springinaction.transaction;\npublic interface BookShopService {\n public void purchase(String username, String isbn);\n}<\/code><\/pre>\n\n\n\nBookShopServiceImpl<\/p>\n\n\n\n
package com.springinaction.transaction;\n\nimport org.springframework.beans.factory.annotation.Autowired;\nimport org.springframework.stereotype.Service;\nimport org.springframework.transaction.annotation.Isolation;\nimport org.springframework.transaction.annotation.Propagation;\nimport org.springframework.transaction.annotation.Transactional;\n\n@Service(\"bookShopService\")\npublic class BookShopServiceImpl implements BookShopService {\n\n @Autowired\n private BookShopDao bookShopDao;\n\n \/**\n * 1.\u6dfb\u52a0\u4e8b\u52a1\u6ce8\u89e3\n * \u4f7f\u7528propagation \u6307\u5b9a\u4e8b\u52a1\u7684\u4f20\u64ad\u884c\u4e3a\uff0c\u5373\u5f53\u524d\u7684\u4e8b\u52a1\u65b9\u6cd5\u88ab\u53e6\u5916\u4e00\u4e2a\u4e8b\u52a1\u65b9\u6cd5\u8c03\u7528\u65f6\u5982\u4f55\u4f7f\u7528\u4e8b\u52a1\u3002\n * \u9ed8\u8ba4\u53d6\u503c\u4e3aREQUIRED\uff0c\u5373\u4f7f\u7528\u8c03\u7528\u65b9\u6cd5\u7684\u4e8b\u52a1\n * REQUIRES_NEW\uff1a\u4f7f\u7528\u81ea\u5df1\u7684\u4e8b\u52a1\uff0c\u8c03\u7528\u7684\u4e8b\u52a1\u65b9\u6cd5\u7684\u4e8b\u52a1\u88ab\u6302\u8d77\u3002\n *\n * 2.\u4f7f\u7528isolation \u6307\u5b9a\u4e8b\u52a1\u7684\u9694\u79bb\u7ea7\u522b\uff0c\u6700\u5e38\u7528\u7684\u53d6\u503c\u4e3aREAD_COMMITTED\n * 3.\u9ed8\u8ba4\u60c5\u51b5\u4e0b Spring \u7684\u58f0\u660e\u5f0f\u4e8b\u52a1\u5bf9\u6240\u6709\u7684\u8fd0\u884c\u65f6\u5f02\u5e38\u8fdb\u884c\u56de\u6eda\uff0c\u4e5f\u53ef\u4ee5\u901a\u8fc7\u5bf9\u5e94\u7684\u5c5e\u6027\u8fdb\u884c\u8bbe\u7f6e\u3002\u901a\u5e38\u60c5\u51b5\u4e0b\uff0c\u9ed8\u8ba4\u503c\u5373\u53ef\u3002\n * 4.\u4f7f\u7528readOnly \u6307\u5b9a\u4e8b\u52a1\u662f\u5426\u4e3a\u53ea\u8bfb\u3002 \u8868\u793a\u8fd9\u4e2a\u4e8b\u52a1\u53ea\u8bfb\u53d6\u6570\u636e\u4f46\u4e0d\u66f4\u65b0\u6570\u636e\uff0c\u8fd9\u6837\u53ef\u4ee5\u5e2e\u52a9\u6570\u636e\u5e93\u5f15\u64ce\u4f18\u5316\u4e8b\u52a1\u3002\u82e5\u771f\u7684\u662f\u4e00\u4e2a\u53ea\u8bfb\u53d6\u6570\u636e\u5e93\u503c\u5f97\u65b9\u6cd5\uff0c\u5e94\u8bbe\u7f6ereadOnly=true\n * 5.\u4f7f\u7528timeOut \u6307\u5b9a\u5f3a\u5236\u56de\u6eda\u4e4b\u524d\u4e8b\u52a1\u53ef\u4ee5\u5360\u7528\u7684\u65f6\u95f4\u3002\n *\/\n @Transactional(propagation=Propagation.REQUIRES_NEW,\n isolation=Isolation.READ_COMMITTED,\n noRollbackFor={UserAccountException.class},\n readOnly=true, timeout=3)\n @Override\n public void purchase(String username, String isbn) {\n \/\/1.\u83b7\u53d6\u4e66\u7684\u5355\u4ef7\n int price = bookShopDao.findBookPriceByIsbn(isbn);\n \/\/2.\u66f4\u65b0\u4e66\u7684\u5e93\u5b58\n bookShopDao.updateBookStock(isbn);\n \/\/3.\u66f4\u65b0\u7528\u6237\u4f59\u989d\n bookShopDao.updateUserAccount(username, price);\n }\n}<\/code><\/pre>\n\n\n\nCashier<\/p>\n\n\n\n
package com.springinaction.transaction;\nimport java.util.List;\npublic interface Cashier {\n public void checkout(String username, List<String>isbns);\n}<\/code><\/pre>\n\n\n\nCashierImpl\uff1aCashierImpl.checkout\u548cbookShopService.purchase\u8054\u5408\u6d4b\u8bd5\u4e86\u4e8b\u52a1\u7684\u4f20\u64ad\u884c\u4e3a<\/p>\n\n\n\n
package com.springinaction.transaction;\n\nimport java.util.List;\n\nimport org.springframework.beans.factory.annotation.Autowired;\nimport org.springframework.stereotype.Service;\nimport org.springframework.transaction.annotation.Transactional;\n\n@Service(\"cashier\")\npublic class CashierImpl implements Cashier {\n @Autowired\n private BookShopService bookShopService;\n\n @Transactional\n @Override\n public void checkout(String username, List<String> isbns) {\n for(String isbn : isbns) {\n bookShopService.purchase(username, isbn);\n }\n }\n}<\/code><\/pre>\n\n\n\nBookStockException<\/p>\n\n\n\n
\npackage com.springinaction.transaction;\npublic class BookStockException extends RuntimeException {\n\n private static final long serialVersionUID = 1L;\n\n public BookStockException() {\n super();\n \/\/ TODO Auto-generated constructor stub\n }\n\n public BookStockException(String arg0, Throwable arg1, boolean arg2,\n boolean arg3) {\n super(arg0, arg1, arg2, arg3);\n \/\/ TODO Auto-generated constructor stub\n }\n\n public BookStockException(String arg0, Throwable arg1) {\n super(arg0, arg1);\n \/\/ TODO Auto-generated constructor stub\n }\n\n public BookStockException(String arg0) {\n super(arg0);\n \/\/ TODO Auto-generated constructor stub\n }\n\n public BookStockException(Throwable arg0) {\n super(arg0);\n \/\/ TODO Auto-generated constructor stub\n }\n}<\/code><\/pre>\n\n\n\nUserAccountException<\/p>\n\n\n\n
package com.springinaction.transaction;\npublic class UserAccountException extends RuntimeException {\n\n private static final long serialVersionUID = 1L;\n\n public UserAccountException() {\n super();\n \/\/ TODO Auto-generated constructor stub\n }\n\n public UserAccountException(String arg0, Throwable arg1, boolean arg2,\n boolean arg3) {\n super(arg0, arg1, arg2, arg3);\n \/\/ TODO Auto-generated constructor stub\n }\n\n public UserAccountException(String arg0, Throwable arg1) {\n super(arg0, arg1);\n \/\/ TODO Auto-generated constructor stub\n }\n\n public UserAccountException(String arg0) {\n super(arg0);\n \/\/ TODO Auto-generated constructor stub\n }\n\n public UserAccountException(Throwable arg0) {\n super(arg0);\n \/\/ TODO Auto-generated constructor stub\n }\n}<\/code><\/pre>\n\n\n\n\u6d4b\u8bd5\u7c7b<\/p>\n\n\n\n
package com.springinaction.transaction;\n\nimport java.util.Arrays;\n\nimport org.junit.Test;\nimport org.springframework.context.ApplicationContext;\nimport org.springframework.context.support.ClassPathXmlApplicationContext;\n\npublic class SpringTransitionTest {\n\n private ApplicationContext ctx = null;\n private BookShopDao bookShopDao = null;\n private BookShopService bookShopService = null;\n private Cashier cashier = null;\n {\n ctx = new ClassPathXmlApplicationContext(\"config\/transaction.xml\");\n bookShopDao = ctx.getBean(BookShopDao.class);\n bookShopService = ctx.getBean(BookShopService.class);\n cashier = ctx.getBean(Cashier.class);\n }\n\n @Test\n public void testBookShopDaoFindPriceByIsbn() {\n System.out.println(bookShopDao.findBookPriceByIsbn(\"1001\"));\n }\n\n @Test\n public void testBookShopDaoUpdateBookStock(){\n bookShopDao.updateBookStock(\"1001\");\n }\n\n @Test\n public void testBookShopDaoUpdateUserAccount(){\n bookShopDao.updateUserAccount(\"AA\", 100);\n }\n @Test\n public void testBookShopService(){\n bookShopService.purchase(\"AA\", \"1001\");\n }\n\n @Test\n public void testTransactionPropagation(){\n cashier.checkout(\"AA\", Arrays.asList(\"1001\", \"1002\"));\n }\n}<\/code><\/pre>\n\n\n\nOVER<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"\u5199\u8fd9\u7bc7\u535a\u5ba2\u4e4b\u524d\u6211\u9996\u5148\u8bfb\u4e86\u300aSpring in action\u300b\uff0c\u4e4b\u540e\u5728\u7f51\u4e0a\u770b\u4e86\u4e00\u4e9b\u5173\u4e8eSpring\u4e8b\u52a1\u7ba1\u7406\u7684\u6587\u7ae0\uff0c\u611f\u89c9\u90fd\u6ca1\u6709\u8bb2\u5168\uff0c\u8fd9\u91cc\u5c31\u5c06\u4e66\u4e0a\u7684\u548c\u7f51\u4e0a\u5173\u4e8e\u4e8b\u52a1\u7684\u77e5\u8bc6\u603b\u7ed3\u4e00\u4e0b\uff0c\u53c2\u8003\u7684\u6587\u7ae0\u5982\u4e0b\uff1a Spring\u4e8b\u52a1\u673a\u5236\u8be6\u89e3Spring\u4e8b\u52a1\u914d\u7f6e\u7684\u4e94\u79cd\u65b9\u5f0fSpring\u4e2d\u7684\u4e8b\u52a1\u7ba1\u7406\u5b9e\u4f8b\u8be6\u89e3 1 \u521d\u6b65\u7406\u89e3 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![\"\"](\"https:\/\/blog.jsjs.org\/wp-content\/uploads\/2018\/08\/20160324011156424.png\")
<\/figure>\n\n\n\n![\"\"](\"https:\/\/blog.jsjs.org\/wp-content\/uploads\/2018\/08\/20160325003448793.png\")
<\/figure>\n\n\n\n