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Implement distributed transations Management in the Campus Syste
mZhuo Zeng
Layers
Three layers:
1. Presentation Layer
2. Application Layer
3. Data Mapping Layer
Database
• 3 tables:
Data-Mapping
• <hibernate-mapping>• <class name="com.zz.po.User" table="[USER]" >• <id name="userid" type="java.lang.Long">• <column name="userid" />• <generator class="identity" />• </id>• <property name="username" type="java.lang.String">• <column name="username" />• </property>• <property name="password" type="java.lang.String">• <column name="password" />• </property>• <property name="truename" type="java.lang.String">• <column name="truename" />• </property>• <property name="birthday" type="java.lang.String">• <column name="birthday" />• </property>• <property name="telephone" type="java.lang.String">• <column name="telephone" />• </property>• <property name="email" type="java.lang.String">• <column name="email" />• </property>• <property name="usertype" type="java.lang.Integer">• <column name="usertype" />• </property>• <property name="lock" type="java.lang.Integer">• <column name="lock" />• </property>• </class>• </hibernate-mapping>
Strust+Spring+Hibernate
Connection Pool
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close" p:driverClass="com.microsoft.sqlserver.jdbc.SQLServerDriver"p:jdbcUrl="jdbc:sqlserver://localhost:1433;databaseName=Admin"
p:user="sa" p:password="123456" p:maxPoolSize="40" p:minPoolSize="1"
p:initialPoolSize="1" p:maxIdleTime="20" />
Transaction
The simplistic view of a transaction issued to the database using SQL is as follows:
1. Begin the transaction using begin transaction command.
2. Perform various deleted, update or insert operations using SQL queries.
3. If all the operation are successful then perform commit otherwise rollback all the operations.
Transaction
• </bean>• <bean class="org.springframework.transaction.interceptor.TransactionInter
ceptor" id="transactionInterceptor">• <property name="transactionManager" ref="transactionManager"/>• <property name="transactionAttributes">• <props>• <prop key="add*">PROPAGATION_REQUIRED</prop>• <!--PROPAGATION_REQUIRED:Support a current transaction; create a new one if none exists.!->
• <prop key="modify*">PROPAGATION_REQUIRED</prop>• <prop key="update*">PROPAGATION_REQUIRED</prop>• <prop key="log*">PROPAGATION_REQUIRED</prop>• <prop key="*">PROPAGATION_SUPPORTS,readOnly</prop>• <!--PROPAGATION_SUPPORTS:Support a current transaction, execute non-transactionally if none exists.!-->
• </props>• </property>• </bean>
Login
Administrator
Student Management
Teacher Management
Course Management
Teacher Management System
Student Management System
