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spring-transaction.drawio
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spring-transaction.drawio
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<mxCell id="3tcmVddGPVW7wgybLThJ-6" value="" style="edgeStyle=orthogonalEdgeStyle;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;fontColor=#330000;curved=1;" parent="1" source="3tcmVddGPVW7wgybLThJ-3" target="3tcmVddGPVW7wgybLThJ-5" edge="1">
<mxGeometry relative="1" as="geometry" />
</mxCell>
<mxCell id="3tcmVddGPVW7wgybLThJ-3" value="&lt;cinit&gt;<br>" style="rounded=1;whiteSpace=wrap;html=1;fontSize=10;" parent="1" vertex="1">
<mxGeometry x="320" y="380" width="120" height="40" as="geometry" />
</mxCell>
<mxCell id="3tcmVddGPVW7wgybLThJ-5" value="Constants constants = new Constants(<b>TransactionDefinition</b>.class)<br><font color="#007fff">读取TransactionDefinition public static final 字段存到&nbsp;<b>fieldCache</b> Map中，</font><font color="#cc0066">什么用？</font>" style="rounded=1;whiteSpace=wrap;html=1;fontSize=10;" parent="1" vertex="1">
<mxGeometry x="480" y="375" width="200" height="50" as="geometry" />
</mxCell>
<mxCell id="3tcmVddGPVW7wgybLThJ-7" value="org.springframework.transaction.support.TransactionTemplate" style="swimlane;startSize=20;" parent="1" vertex="1">
<mxGeometry x="-520" y="480" width="480" height="160" as="geometry" />
</mxCell>
<mxCell id="3tcmVddGPVW7wgybLThJ-8" value="<div><b style="color: rgb(51 , 0 , 0)">transactionManager</b><span style="color: rgb(51 , 0 , 0)"> = null</span><br></div><div><b style="color: rgb(51 , 0 , 0)">propagationBehavior</b><font color="#330000"> = 0</font><span style="color: rgb(51 , 0 , 0)">	</span><span style="color: rgb(51 , 0 , 0)">	</span><font color="#007fff">//0是<b>PROPAGATION_REQUIRED</b>, 即默认的事务传递策略</font></div><div><b style="color: rgb(51 , 0 , 0)">isolationLevel</b><font color="#330000"> = -1</font><span style="color: rgb(51 , 0 , 0)">	</span>			<font color="#007fff">//-1是<b>ISOLATION_DEFAULT</b>, 即默认使用数据库默认的隔离级别</font></div><div><font color="#330000">timeout = -1</font><span style="color: rgb(51 , 0 , 0) ; white-space: pre">	</span><font color="#007fff">//TIMEOUT_DEFAULT</font></div><div><font color="#330000">readOnly = false</font></div><div><font color="#330000">name = null</font></div>" style="text;html=1;strokeColor=none;fillColor=none;align=left;verticalAlign=middle;whiteSpace=wrap;rounded=0;fontSize=10;" parent="3tcmVddGPVW7wgybLThJ-7" vertex="1">
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<mxCell id="3tcmVddGPVW7wgybLThJ-9" value="&lt;init&gt;<br><font color="#007fff">主要是设置默认的事务传播策略、隔离级别等</font>" style="rounded=1;whiteSpace=wrap;html=1;fontSize=10;" parent="1" vertex="1">
<mxGeometry x="320" y="440" width="120" height="40" as="geometry" />
</mxCell>
<mxCell id="3tcmVddGPVW7wgybLThJ-15" value="" style="edgeStyle=orthogonalEdgeStyle;curved=1;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;fontColor=#007FFF;" parent="1" source="3tcmVddGPVW7wgybLThJ-12" target="3tcmVddGPVW7wgybLThJ-14" edge="1">
<mxGeometry relative="1" as="geometry" />
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<mxCell id="3tcmVddGPVW7wgybLThJ-12" value="&lt;cinit&gt;" style="rounded=1;whiteSpace=wrap;html=1;fontSize=10;" parent="1" vertex="1">
<mxGeometry x="320" y="500" width="120" height="40" as="geometry" />
</mxCell>
<mxCell id="3tcmVddGPVW7wgybLThJ-14" value="<font style="font-size: 9px">Constants constants = new Constants(<br><b>AbstractPlatformTransactionManager</b>.class);<font color="#007fff"><br>同上</font><br></font>" style="rounded=1;whiteSpace=wrap;html=1;fontSize=10;" parent="1" vertex="1">
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</mxCell>
<mxCell id="3tcmVddGPVW7wgybLThJ-25" style="edgeStyle=orthogonalEdgeStyle;curved=1;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;exitX=1;exitY=0.5;exitDx=0;exitDy=0;entryX=0;entryY=0.5;entryDx=0;entryDy=0;fontSize=9;fontColor=#007FFF;" parent="1" source="3tcmVddGPVW7wgybLThJ-19" target="3tcmVddGPVW7wgybLThJ-24" edge="1">
<mxGeometry relative="1" as="geometry" />
</mxCell>
<mxCell id="3tcmVddGPVW7wgybLThJ-19" value="&lt;init&gt;" style="rounded=1;whiteSpace=wrap;html=1;fontSize=10;" parent="1" vertex="1">
<mxGeometry x="320" y="560" width="120" height="40" as="geometry" />
</mxCell>
<mxCell id="3tcmVddGPVW7wgybLThJ-23" value="" style="edgeStyle=orthogonalEdgeStyle;curved=1;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;fontSize=9;fontColor=#007FFF;" parent="1" source="3tcmVddGPVW7wgybLThJ-20" target="3tcmVddGPVW7wgybLThJ-22" edge="1">
<mxGeometry relative="1" as="geometry" />
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<mxCell id="3tcmVddGPVW7wgybLThJ-20" value="setDataSource(dataSource)<br><font color="#007fff">如果dataSource是代理对象，先获取原始类型对象</font>" style="rounded=1;whiteSpace=wrap;html=1;fontSize=10;" parent="1" vertex="1">
<mxGeometry x="480" y="620" width="160" height="40" as="geometry" />
</mxCell>
<mxCell id="3tcmVddGPVW7wgybLThJ-22" value="afterPropertiesSet()<br><font color="#007fff">只是字段为空检查</font>" style="rounded=1;whiteSpace=wrap;html=1;fontSize=10;" parent="1" vertex="1">
<mxGeometry x="480" y="680" width="160" height="40" as="geometry" />
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<mxCell id="3tcmVddGPVW7wgybLThJ-26" style="edgeStyle=orthogonalEdgeStyle;curved=1;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;exitX=0.5;exitY=1;exitDx=0;exitDy=0;fontSize=9;fontColor=#007FFF;" parent="1" source="3tcmVddGPVW7wgybLThJ-24" target="3tcmVddGPVW7wgybLThJ-20" edge="1">
<mxGeometry relative="1" as="geometry" />
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<mxCell id="3tcmVddGPVW7wgybLThJ-24" value="this()<br><font color="#007fff">一些字段初始化</font>" style="rounded=1;whiteSpace=wrap;html=1;fontSize=10;" parent="1" vertex="1">
<mxGeometry x="480" y="560" width="160" height="40" as="geometry" />
</mxCell>
<mxCell id="3tcmVddGPVW7wgybLThJ-27" value="org.springframework.jdbc.datasource.DataSourceTransactionManager" style="swimlane;startSize=20;" parent="1" vertex="1">
<mxGeometry x="-520" y="680" width="480" height="160" as="geometry" />
</mxCell>
<mxCell id="3tcmVddGPVW7wgybLThJ-28" value="<div><font color="#330000"><b>dataSource</b> = {DriverManagerDataSource@738}&nbsp;</font></div><div><font color="#330000">enforceReadOnly = false</font></div><div><span style="color: rgb(51 , 0 , 0)">transactionSynchronization = 0</span><br></div><div><font color="#330000">defaultTimeout = -1</font></div><div><font color="#330000">nestedTransactionAllowed = true</font></div><div><font color="#330000">validateExistingTransaction = false</font></div><div><font color="#330000"><b>globalRollbackOnParticipationFailure</b> = true</font></div><div><font color="#330000">failEarlyOnGlobalRollbackOnly = false</font></div><div><font color="#330000">rollbackOnCommitFailure = false</font></div>" style="text;html=1;strokeColor=none;fillColor=none;align=left;verticalAlign=middle;whiteSpace=wrap;rounded=0;fontSize=10;" parent="3tcmVddGPVW7wgybLThJ-27" vertex="1">
<mxGeometry y="20" width="480" height="140" as="geometry" />
</mxCell>
<mxCell id="t2Bh8Tgv82BLZMkkJCVr-8" value="Y" style="edgeStyle=orthogonalEdgeStyle;curved=1;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;fontSize=8;" parent="1" source="t2Bh8Tgv82BLZMkkJCVr-3" target="t2Bh8Tgv82BLZMkkJCVr-7" edge="1">
<mxGeometry relative="1" as="geometry" />
</mxCell>
<mxCell id="t2Bh8Tgv82BLZMkkJCVr-10" value="N" style="edgeStyle=orthogonalEdgeStyle;curved=1;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;exitX=0.5;exitY=1;exitDx=0;exitDy=0;entryX=0.5;entryY=0;entryDx=0;entryDy=0;fontSize=8;" parent="1" source="t2Bh8Tgv82BLZMkkJCVr-3" target="t2Bh8Tgv82BLZMkkJCVr-9" edge="1">
<mxGeometry relative="1" as="geometry" />
</mxCell>
<mxCell id="t2Bh8Tgv82BLZMkkJCVr-3" value="<font style="font-size: 8px">this.transactionManager instanceof CallbackPreferringPlatformTransactionManager</font>" style="rhombus;whiteSpace=wrap;html=1;fontSize=10;rounded=1;arcSize=10;" parent="1" vertex="1">
<mxGeometry x="340" y="840" width="160" height="80" as="geometry" />
</mxCell>
<mxCell id="t2Bh8Tgv82BLZMkkJCVr-7" value="<font color="#007fff">DEMO没走这里，TODO</font>" style="whiteSpace=wrap;html=1;fontSize=10;rounded=1;arcSize=10;" parent="1" vertex="1">
<mxGeometry x="560" y="860" width="160" height="40" as="geometry" />
</mxCell>
<mxCell id="t2Bh8Tgv82BLZMkkJCVr-12" value="" style="edgeStyle=orthogonalEdgeStyle;curved=1;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;fontSize=8;" parent="1" source="t2Bh8Tgv82BLZMkkJCVr-9" target="t2Bh8Tgv82BLZMkkJCVr-11" edge="1">
<mxGeometry relative="1" as="geometry" />
</mxCell>
<mxCell id="t2Bh8Tgv82BLZMkkJCVr-25" value="" style="edgeStyle=orthogonalEdgeStyle;curved=1;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;fontSize=8;" parent="1" source="t2Bh8Tgv82BLZMkkJCVr-9" target="t2Bh8Tgv82BLZMkkJCVr-24" edge="1">
<mxGeometry relative="1" as="geometry" />
</mxCell>
<mxCell id="t2Bh8Tgv82BLZMkkJCVr-9" value="TransactionStatus <b>status</b> = this.transactionManager.getTransaction(this)" style="whiteSpace=wrap;html=1;fontSize=10;rounded=1;arcSize=10;fillColor=#dae8fc;strokeColor=#6c8ebf;" parent="1" vertex="1">
<mxGeometry x="310" y="960" width="220" height="40" as="geometry" />
</mxCell>
<mxCell id="t2Bh8Tgv82BLZMkkJCVr-14" value="" style="edgeStyle=orthogonalEdgeStyle;curved=1;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;fontSize=8;" parent="1" source="t2Bh8Tgv82BLZMkkJCVr-11" target="t2Bh8Tgv82BLZMkkJCVr-13" edge="1">
<mxGeometry relative="1" as="geometry" />
</mxCell>
<mxCell id="t2Bh8Tgv82BLZMkkJCVr-19" style="edgeStyle=orthogonalEdgeStyle;curved=1;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;exitX=1;exitY=0.5;exitDx=0;exitDy=0;entryX=1;entryY=1;entryDx=0;entryDy=0;fontSize=8;dashed=1;strokeColor=#00CC66;shape=link;" parent="1" source="t2Bh8Tgv82BLZMkkJCVr-11" target="6U_a8jkAf0Mo0z_RWQwz-12" edge="1">
<mxGeometry relative="1" as="geometry">
<Array as="points">
<mxPoint x="540" y="3280" />
<mxPoint x="540" y="800" />
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</mxCell>
<mxCell id="t2Bh8Tgv82BLZMkkJCVr-11" value="result = action.doInTransaction(status)<br><font color="#007fff">在事务中执行业务操作</font>" style="whiteSpace=wrap;html=1;fontSize=10;rounded=1;arcSize=10;" parent="1" vertex="1">
<mxGeometry x="322.5" y="3260" width="200" height="40" as="geometry" />
</mxCell>
<mxCell id="t2Bh8Tgv82BLZMkkJCVr-16" value="Y, 异常" style="edgeStyle=orthogonalEdgeStyle;curved=1;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;exitX=1;exitY=0.5;exitDx=0;exitDy=0;entryX=0;entryY=0.5;entryDx=0;entryDy=0;fontSize=8;" parent="1" source="t2Bh8Tgv82BLZMkkJCVr-13" target="t2Bh8Tgv82BLZMkkJCVr-15" edge="1">
<mxGeometry relative="1" as="geometry" />
</mxCell>
<mxCell id="t2Bh8Tgv82BLZMkkJCVr-18" value="N，无异常" style="edgeStyle=orthogonalEdgeStyle;curved=1;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;exitX=0.5;exitY=1;exitDx=0;exitDy=0;entryX=0.5;entryY=0;entryDx=0;entryDy=0;fontSize=8;" parent="1" source="t2Bh8Tgv82BLZMkkJCVr-13" target="t2Bh8Tgv82BLZMkkJCVr-17" edge="1">
<mxGeometry relative="1" as="geometry" />
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<mxCell id="t2Bh8Tgv82BLZMkkJCVr-13" value="RuntimeException <br>| Error | Throwable ex" style="rhombus;whiteSpace=wrap;html=1;fontSize=10;rounded=1;arcSize=10;" parent="1" vertex="1">
<mxGeometry x="362.5" y="3360" width="120" height="80" as="geometry" />
</mxCell>
<mxCell id="t2Bh8Tgv82BLZMkkJCVr-23" value="" style="edgeStyle=orthogonalEdgeStyle;curved=1;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;fontSize=8;" parent="1" source="t2Bh8Tgv82BLZMkkJCVr-15" target="t2Bh8Tgv82BLZMkkJCVr-22" edge="1">
<mxGeometry relative="1" as="geometry" />
</mxCell>
<mxCell id="t2Bh8Tgv82BLZMkkJCVr-158" value="" style="edgeStyle=orthogonalEdgeStyle;curved=1;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;fontSize=8;fontColor=#007FFF;strokeColor=#000000;" parent="1" source="t2Bh8Tgv82BLZMkkJCVr-15" target="t2Bh8Tgv82BLZMkkJCVr-157" edge="1">
<mxGeometry relative="1" as="geometry" />
</mxCell>
<mxCell id="t2Bh8Tgv82BLZMkkJCVr-15" value="rollbackOnException(status, ex)" style="whiteSpace=wrap;html=1;fontSize=10;rounded=1;arcSize=10;fillColor=#dae8fc;strokeColor=#6c8ebf;" parent="1" vertex="1">
<mxGeometry x="562.5" y="3380" width="160" height="40" as="geometry" />
</mxCell>
<mxCell id="t2Bh8Tgv82BLZMkkJCVr-21" value="" style="edgeStyle=orthogonalEdgeStyle;curved=1;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;fontSize=8;" parent="1" source="t2Bh8Tgv82BLZMkkJCVr-17" target="t2Bh8Tgv82BLZMkkJCVr-20" edge="1">
<mxGeometry relative="1" as="geometry" />
</mxCell>
<mxCell id="xfdcjk_qxBO9EsxSu5Ji-113" value="" style="edgeStyle=orthogonalEdgeStyle;curved=1;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;fontSize=9;fontColor=#007FFF;strokeColor=#000000;" parent="1" source="t2Bh8Tgv82BLZMkkJCVr-17" target="xfdcjk_qxBO9EsxSu5Ji-112" edge="1">
<mxGeometry relative="1" as="geometry" />
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<mxCell id="xfdcjk_qxBO9EsxSu5Ji-116" style="edgeStyle=orthogonalEdgeStyle;curved=1;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;exitX=1;exitY=0.5;exitDx=0;exitDy=0;entryX=0;entryY=0.5;entryDx=0;entryDy=0;fontSize=9;fontColor=#007FFF;strokeColor=#000000;" parent="1" source="t2Bh8Tgv82BLZMkkJCVr-17" target="xfdcjk_qxBO9EsxSu5Ji-114" edge="1">
<mxGeometry relative="1" as="geometry" />
</mxCell>
<mxCell id="t2Bh8Tgv82BLZMkkJCVr-17" value="this.transactionManager.commit(status)" style="whiteSpace=wrap;html=1;fontSize=10;rounded=1;arcSize=10;fillColor=#dae8fc;strokeColor=#6c8ebf;" parent="1" vertex="1">
<mxGeometry x="322.5" y="3520.5" width="200" height="40" as="geometry" />
</mxCell>
<mxCell id="t2Bh8Tgv82BLZMkkJCVr-20" value="return result;" style="whiteSpace=wrap;html=1;fontSize=10;rounded=1;arcSize=10;" parent="1" vertex="1">
<mxGeometry x="322.5" y="3662" width="200" height="40" as="geometry" />
</mxCell>
<mxCell id="t2Bh8Tgv82BLZMkkJCVr-22" value="throw ex<br><font color="#007fff">如果有外层事务，会被外层事务再次捕获</font>" style="whiteSpace=wrap;html=1;fontSize=10;rounded=1;arcSize=10;" parent="1" vertex="1">
<mxGeometry x="562.5" y="3440" width="160" height="40" as="geometry" />
</mxCell>
<mxCell id="t2Bh8Tgv82BLZMkkJCVr-27" value="" style="edgeStyle=orthogonalEdgeStyle;curved=1;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;fontSize=8;" parent="1" source="t2Bh8Tgv82BLZMkkJCVr-24" target="t2Bh8Tgv82BLZMkkJCVr-26" edge="1">
<mxGeometry relative="1" as="geometry" />
</mxCell>
<mxCell id="3tcmVddGPVW7wgybLThJ-39" style="edgeStyle=orthogonalEdgeStyle;curved=1;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;exitX=0.5;exitY=1;exitDx=0;exitDy=0;entryX=0.5;entryY=0;entryDx=0;entryDy=0;fontSize=9;fontColor=#007FFF;" parent="1" source="t2Bh8Tgv82BLZMkkJCVr-24" target="3tcmVddGPVW7wgybLThJ-31" edge="1">
<mxGeometry relative="1" as="geometry" />
</mxCell>
<mxCell id="t2Bh8Tgv82BLZMkkJCVr-24" value="Object transaction = doGetTransaction();<br><font color="#007fff">从缓存获取事务对象（事务对象本质是带着事务控制参数的连接对象）</font>" style="whiteSpace=wrap;html=1;fontSize=10;rounded=1;arcSize=10;fillColor=#dae8fc;strokeColor=#6c8ebf;" parent="1" vertex="1">
<mxGeometry x="560" y="960" width="200" height="40" as="geometry" />
</mxCell>
<mxCell id="t2Bh8Tgv82BLZMkkJCVr-29" value="" style="edgeStyle=orthogonalEdgeStyle;curved=1;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;fontSize=8;" parent="1" source="t2Bh8Tgv82BLZMkkJCVr-26" target="t2Bh8Tgv82BLZMkkJCVr-28" edge="1">
<mxGeometry relative="1" as="geometry" />
</mxCell>
<mxCell id="t2Bh8Tgv82BLZMkkJCVr-26" value="DataSourceTransactionObject txObject = new <b>DataSourceTransactionObject</b>()" style="whiteSpace=wrap;html=1;fontSize=10;rounded=1;arcSize=10;" parent="1" vertex="1">
<mxGeometry x="800" y="960" width="200" height="40" as="geometry" />
</mxCell>
<mxCell id="t2Bh8Tgv82BLZMkkJCVr-31" value="" style="edgeStyle=orthogonalEdgeStyle;curved=1;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;fontSize=8;fontColor=#007FFF;" parent="1" source="t2Bh8Tgv82BLZMkkJCVr-28" target="t2Bh8Tgv82BLZMkkJCVr-30" edge="1">
<mxGeometry relative="1" as="geometry" />
</mxCell>
<mxCell id="t2Bh8Tgv82BLZMkkJCVr-28" value="txObject.setSavepointAllowed(<br>isNestedTransactionAllowed())<br><font color="#007fff">savepointAllowed = true;<br></font>" style="whiteSpace=wrap;html=1;fontSize=10;rounded=1;arcSize=10;" parent="1" vertex="1">
<mxGeometry x="800" y="1020" width="200" height="40" as="geometry" />
</mxCell>
<mxCell id="t2Bh8Tgv82BLZMkkJCVr-33" value="" style="edgeStyle=orthogonalEdgeStyle;curved=1;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;fontSize=8;fontColor=#007FFF;" parent="1" source="t2Bh8Tgv82BLZMkkJCVr-30" target="t2Bh8Tgv82BLZMkkJCVr-32" edge="1">
<mxGeometry relative="1" as="geometry" />
</mxCell>
<mxCell id="t2Bh8Tgv82BLZMkkJCVr-30" value="<div style="font-size: 9px"><div>ConnectionHolder conHolder = (ConnectionHolder) <b>TransactionSynchronizationManager</b><br>.<b>getResource</b>(obtainDataSource());</div><div>txObject.setConnectionHolder(conHolder, false);<br><font color="#007fff" style="font-size: 9px">从resources ThreadLocal中获取连接，</font></div><div><font color="#007fff" style="font-size: 9px">首次执行connectionHolder获取肯定为空，如果外层有事务就是返回外层事务的连接</font><br></div></div>" style="whiteSpace=wrap;html=1;fontSize=10;rounded=1;arcSize=10;fillColor=#dae8fc;strokeColor=#6c8ebf;" parent="1" vertex="1">
<mxGeometry x="785" y="1075" width="230" height="80" as="geometry" />
</mxCell>
<mxCell id="t2Bh8Tgv82BLZMkkJCVr-137" style="edgeStyle=orthogonalEdgeStyle;curved=1;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;exitX=1;exitY=1;exitDx=0;exitDy=0;entryX=1;entryY=0;entryDx=0;entryDy=0;fontSize=8;fontColor=#007FFF;strokeColor=#97D077;" parent="1" source="t2Bh8Tgv82BLZMkkJCVr-32" target="t2Bh8Tgv82BLZMkkJCVr-69" edge="1">
<mxGeometry relative="1" as="geometry">
<Array as="points">
<mxPoint x="1380" y="1148" />
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</mxCell>
<mxCell id="t2Bh8Tgv82BLZMkkJCVr-32" value="Object value = doGetResource(actualKey)<br><font color="#007fff">从缓存<b>NamedThreadLocal</b>找线程此数据源对应的连接的副本，首次获取为null,后面会创建并缓存到这个缓存空间，再内层事务再次获取就返回这个缓存的连接</font>" style="whiteSpace=wrap;html=1;fontSize=10;rounded=1;arcSize=10;fillColor=#ffe6cc;strokeColor=#d79b00;" parent="1" vertex="1">
<mxGeometry x="1060" y="1082.5" width="190" height="65" as="geometry" />
</mxCell>
<mxCell id="t2Bh8Tgv82BLZMkkJCVr-37" value="TransactionSynchronizationManager<br>.isSynchronizationActive()<br>即&nbsp;synchronizations TheadLocal是否非空" style="edgeStyle=orthogonalEdgeStyle;curved=1;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;fontSize=8;fontColor=#007FFF;exitX=1;exitY=0.5;exitDx=0;exitDy=0;" parent="1" source="t2Bh8Tgv82BLZMkkJCVr-34" target="t2Bh8Tgv82BLZMkkJCVr-36" edge="1">
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<mxCell id="t2Bh8Tgv82BLZMkkJCVr-49" value="<b>doBegin</b>(transaction, definition)<br><font color="#007fff" style="font-size: 8px">2 创建连接及连接初始化（是否设置只读、设置隔离级别、事务结束后是否恢复自动提交、事务超时时间等、最后绑定资源）</font>" style="whiteSpace=wrap;html=1;fontSize=10;rounded=1;arcSize=10;fillColor=#fad9d5;strokeColor=#ae4132;" parent="1" vertex="1">
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<mxCell id="t2Bh8Tgv82BLZMkkJCVr-51" value="prepareSynchronization(status, definition)<br><font color="#007fff" style="font-size: 8px">设置其他NamedThreadLocal的值</font><div style="font-size: 8px"><font color="#007fff" style="font-size: 8px">如：事务名称、只读标志、隔离级别、事务活跃状态</font></div>" style="whiteSpace=wrap;html=1;fontSize=10;rounded=1;arcSize=10;fillColor=#fad9d5;strokeColor=#ae4132;" parent="1" vertex="1">
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<mxCell id="t2Bh8Tgv82BLZMkkJCVr-62" value="Connection newCon = obtainDataSource().getConnection()<br><font color="#007fff">刚启动没有建立连接，这里需要先建立连接</font>" style="whiteSpace=wrap;html=1;fontSize=10;rounded=1;arcSize=10;fillColor=#fad9d5;strokeColor=#ae4132;" parent="1" vertex="1">
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<mxCell id="t2Bh8Tgv82BLZMkkJCVr-66" value="Y" style="edgeStyle=orthogonalEdgeStyle;curved=1;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;exitX=1;exitY=0.5;exitDx=0;exitDy=0;entryX=0;entryY=0.5;entryDx=0;entryDy=0;fontSize=9;fontColor=#007FFF;" parent="1" source="t2Bh8Tgv82BLZMkkJCVr-64" target="t2Bh8Tgv82BLZMkkJCVr-62" edge="1">
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<mxCell id="t2Bh8Tgv82BLZMkkJCVr-75" value="DriverManager.getConnection(url, props);<br><font color="#007fff">JDBC的接口（绿色节点）</font>" style="whiteSpace=wrap;html=1;fontSize=10;rounded=1;arcSize=10;fillColor=#d5e8d4;strokeColor=#82b366;" parent="1" vertex="1">
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<mxCell id="t2Bh8Tgv82BLZMkkJCVr-81" value="Integer previousIsolationLevel = DataSourceUtils<br>.<b>prepareConnectionForTransaction</b>(con, definition)" style="whiteSpace=wrap;html=1;fontSize=10;rounded=1;arcSize=10;fillColor=#fad9d5;strokeColor=#ae4132;" parent="1" vertex="1">
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<mxCell id="t2Bh8Tgv82BLZMkkJCVr-84" value="txObject.setPreviousIsolationLevel(<br>previousIsolationLevel)" style="whiteSpace=wrap;html=1;fontSize=10;rounded=1;arcSize=10;" parent="1" vertex="1">
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<mxCell id="t2Bh8Tgv82BLZMkkJCVr-86" value="if (con.getAutoCommit()) :&nbsp;<br>txObject.setMustRestoreAutoCommit(true)<br>con.<b>setAutoCommit</b>(false);<br><font color="#007fff" style="font-size: 8px">如果当前是自动提交，记录一下事务执行完后要恢复设置为自动提交，然后关闭自动提交</font>" style="whiteSpace=wrap;html=1;fontSize=10;rounded=1;arcSize=10;fillColor=#d5e8d4;strokeColor=#82b366;" parent="1" vertex="1">
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<mxCell id="3tcmVddGPVW7wgybLThJ-37" value="Y<br><font style="font-size: 7px">说明存在外部事务，<br>使用外部事务处理<br>此内部事务<br></font>" style="edgeStyle=orthogonalEdgeStyle;curved=1;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;exitX=1;exitY=0.5;exitDx=0;exitDy=0;fontSize=9;fontColor=#007FFF;" parent="1" source="3tcmVddGPVW7wgybLThJ-31" target="3tcmVddGPVW7wgybLThJ-36" edge="1">
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<mxCell id="t2Bh8Tgv82BLZMkkJCVr-106" value="<div><font color="#007fff">这个类可以当作一个工具类，内部都是static方法，包含一组NamedThreadLocal静态成员, 关于这个类的作用，可以参考附录，主要就是通过ThreadLocal为数据库连接等状态化的对象提供一种线程安全的访问方式，这样虽然Spring中Service-&gt;DAO层都是单例对象，也可以在线上多线程环境下安全的访问底层有状态的资源。</font></div><div><b style="color: rgb(51 , 0 , 0)">resources</b><font color="#330000"> = {NamedThreadLocal@944} "Transactional resources"</font><span style="color: rgb(51 , 0 , 0) ; white-space: pre">	</span><font color="#007fff">//Connection、Session 等资源，<br>数据源对象-&gt;连接对象的Map</font></div><div><font color="#330000"><b>synchronizations</b> = {NamedThreadLocal@945} "Transaction synchronizations" </font><font color="#007fff">//事务同步器Set</font></div><div><b style="color: rgb(51 , 0 , 0)">currentTransactionName</b><font color="#330000"> = {NamedThreadLocal@946} "Current transaction name"</font><span style="color: rgb(51 , 0 , 0) ; white-space: pre">	</span><font color="#007fff">//事务对象名称</font></div><div><font color="#330000"><b>currentTransactionReadOnly</b> = {NamedThreadLocal@947} "Current transaction read-only status" </font><font color="#007fff">//事务只读状态</font></div><div><font color="#330000"><b>currentTransactionIsolationLevel</b> = {NamedThreadLocal@948} "Current transaction isolation level" </font><font color="#007fff">//事务隔离级别</font></div><div><font color="#330000"><b>actualTransactionActive</b> = {NamedThreadLocal@949} "Actual transaction active" </font><font color="#007fff">//事务活跃状态</font></div>" style="text;html=1;strokeColor=none;fillColor=none;align=left;verticalAlign=middle;whiteSpace=wrap;rounded=0;fontSize=10;" parent="t2Bh8Tgv82BLZMkkJCVr-105" vertex="1">
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<mxCell id="t2Bh8Tgv82BLZMkkJCVr-107" value="<h1 style="font-size: 18px"><span style="font-size: 14px ; font-weight: normal">可借鉴学习：</span></h1><ul><li style="font-size: 11px">事务同步机制[TransactionSynchronizationManager] <br>本质：Spring通过ThreadLocal为状态化的对象提供一种线程安全的访问方法(使用线程私有的副本)。同时也方便工具类获取连接、注册事务同步器等操作，比如DataSourceUtils.getConnection() 、TransactionSynchronizationManager.registerSynchronization()。</li><font style="font-size: 10px">参考</font><span style="font-size: 11px">：</span><font color="#007fff" style="font-size: 11px">https://www.lyytaw.com/spring/spring_tx_TransactionSynchronizationManager<br>https://cloud.tencent.com/developer/article/1497685</font><br><font style="font-size: 11px"><span style="font-size: 10px">原理举例<font color="#007fff">：比如ThreadA、ThreadB连接数据库时都会维护一套自己的配置和状态（比如TransactionSynchronizationManager可以存储Connection、事务名称、只读状态、隔离级别、事务活跃状态等）存放在ThreadLocal，当某线程获取到执行权限，会加载自己的配置然后执行操作，执行完会或被抢占（比如事务被挂起）会将最新的配置和状态更新到ThreadLocal备用，然后将执行权限交给其他线程，其他线程加载自己的配置和状态，执行操作。</font><font color="#cc0066">看多线程下的事务代码验证一下</font></span></font><li style="font-size: 11px">TransactionSynchronization 拓展点的使用<br><font style="font-size: 10px" color="#007fff">比如：<br>1）处理事务中异步操作的坑，参考测试Demo：</font><font color="#007fff">SpringTransactionAsyncExample</font></li></ul><p></p>" style="text;html=1;strokeColor=none;fillColor=none;spacing=5;spacingTop=-20;whiteSpace=wrap;overflow=hidden;rounded=0;" parent="1" vertex="1">
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<mxCell id="t2Bh8Tgv82BLZMkkJCVr-113" value="<font style="font-size: 10px"><b><font style="font-size: 10px">事务传播类型：</font><br></b><font style="font-size: 10px"><b>MANDATORY</b>：外部存在事务就将当前操作融合到外部事务，外部不存在事务就抛异常；</font><br><font style="font-size: 10px"><b>REQUIRED</b>（默认）：外部存在事务就将当前操作融合到外部事务，外部不存在事务就新建事务；</font><br><font style="font-size: 10px"><b>REQUIRES_NEW</b>：外部存在事务就将外部事务先挂起，然后创建新事务，外部不存在事务直接创建新事务；<br></font><b>NESTED</b>：外部存在事务就将当前操作融合到外部事务，SavePoint外层影响内层内层不影响外层，外部不存在事务直接创建新事务；<br><b>SUPPORTS</b>: 外部存在事务就将当前操作融合到外部事务，外部不存在事务也不创建新事务；<br><b>NOT_SUPPORTED</b>:&nbsp;外部存在事务就将外部事务挂起，外部不存在事务也不创建新事务；<br><b>NEVER</b>:&nbsp;外部存在事务就抛异常，外部不存在事务也不创建新事务；<br></font>" style="text;html=1;strokeColor=none;fillColor=none;align=left;verticalAlign=middle;whiteSpace=wrap;rounded=0;fontSize=8;fontColor=#007FFF;" parent="1" vertex="1">
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<mxCell id="t2Bh8Tgv82BLZMkkJCVr-129" value="3.2 重置其他NamedThreadLocal的值<br>如：事务名称、只读标志、隔离级别、事务活跃状态<font color="#007fff">（设置为不活跃）</font>" style="whiteSpace=wrap;html=1;fontSize=10;rounded=1;arcSize=10;fillColor=#ffe6cc;strokeColor=#d79b00;" parent="1" vertex="1">
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<mxCell id="t2Bh8Tgv82BLZMkkJCVr-132" value="<font style="font-size: 10px">即null事务挂起：<br>主要是释放TransactionSynchronizationManager中的NamedTheadLocal资源，即释放线程本地事务资源<br>另外事务同步器的suspend在事务本地资源释放前一步执行</font>" style="text;html=1;strokeColor=none;fillColor=none;align=left;verticalAlign=middle;whiteSpace=wrap;rounded=0;fontSize=8;fontColor=#007FFF;" parent="1" vertex="1">
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<mxCell id="t2Bh8Tgv82BLZMkkJCVr-135" value="<div><b>transaction</b> = {DataSourceTransactionManager$DataSourceTransactionObject@928}&nbsp; <font color="#007fff">//事务对象，本质是连接, 要么是新建的（对最外层事务总是新建），要么是从resouces NamedThreadLocal拿的，具体看传播行为类型</font></div><div>newTransaction = true<span style="white-space: pre">	</span><font color="#007fff">//是否是新建的事务（连接），被融合的事务和外部事务处理的有差别使用这两个参数区分处理</font></div><div>newSynchronization = true<span style="white-space: pre">	</span><font color="#007fff">//是否要为事务新创建事务同步器的NamedThreadLocal（要求事务非活跃状态）</font></div><div>readOnly = false<span style="white-space: pre">	</span><span style="white-space: pre">	</span><font color="#007fff">//是否是只读事务</font></div><div>debug = true</div><div><b>suspendedResources</b> = null<span style="white-space: pre">	</span><font color="#007fff">//被挂起的资源，即被挂起的事务（或称连接）</font></div><div><b>rollbackOnly</b> = false<span style="white-space: pre">	</span><font color="#007fff">//是否需要回滚的标志</font></div><div>completed = false</div><div><b>savepoint</b> = null</div>" style="text;html=1;strokeColor=none;fillColor=none;align=left;verticalAlign=middle;whiteSpace=wrap;rounded=0;fontSize=10;" parent="t2Bh8Tgv82BLZMkkJCVr-134" vertex="1">
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<mxCell id="t2Bh8Tgv82BLZMkkJCVr-138" value="if (definition != null &amp;&amp; definition.isReadOnly()) :&nbsp;<br>con.<b>setReadOnly</b>(true)" style="whiteSpace=wrap;html=1;fontSize=10;rounded=1;arcSize=10;" parent="1" vertex="1">
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<mxCell id="t2Bh8Tgv82BLZMkkJCVr-140" value="<div><font size="1">actualKey = TransactionSynchronizationUtils<br>.unwrapResourceIfNecessary(key)</font><br></div>" style="whiteSpace=wrap;html=1;fontSize=10;rounded=1;arcSize=10;" parent="1" vertex="1">
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<mxCell id="t2Bh8Tgv82BLZMkkJCVr-142" value="<font style="font-size: 9px">if (definition != null &amp;&amp; definition.getIsolationLevel() != TransactionDefinition.ISOLATION_DEFAULT) :&nbsp;<br>currentIsolation = con.getTransactionIsolation();<br></font><div style="font-size: 9px"><font style="font-size: 9px">previousIsolationLevel = currentIsolation;</font></div><div style="font-size: 9px"><font style="font-size: 9px"><span>				</span>con.<b>setTransactionIsolation</b>(definition.getIsolationLevel())</font></div>" style="whiteSpace=wrap;html=1;fontSize=10;rounded=1;arcSize=10;" parent="1" vertex="1">
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<mxCell id="t2Bh8Tgv82BLZMkkJCVr-144" value="<div><font size="1">Map&lt;Object, Object&gt; map = resources.get();<br></font><b>resources</b>.set(map);<br></div><div>map.put(actualKey, value)<br><font color="#007fff">即重新设置resources ThreadLocal，当前数据源到新建连接的映射</font></div>" style="whiteSpace=wrap;html=1;fontSize=10;rounded=1;arcSize=10;" parent="1" vertex="1">
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<mxCell id="t2Bh8Tgv82BLZMkkJCVr-146" value="Connection conn = DataSourceUtils.getConnection(ds)<br><font color="#cc0066">获取的是同一个连接么？是；<br>之所以要随时注意获取的是否是同一个连接是因为事务作用域是会话（即连接），要保证事务有效必须确保是在一个连接会话中<br></font>" style="rounded=1;whiteSpace=wrap;html=1;fontSize=10;" parent="1" vertex="1">
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<mxCell id="t2Bh8Tgv82BLZMkkJCVr-148" value="第１个更新操作：<br>创建Statement并执行prepare.executeUpdate()" style="rounded=1;whiteSpace=wrap;html=1;fontSize=10;" parent="1" vertex="1">
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<mxCell id="t2Bh8Tgv82BLZMkkJCVr-151" value="savePoint = status.createSavepoint();" style="rounded=1;whiteSpace=wrap;html=1;fontSize=10;fillColor=#dae8fc;strokeColor=#6c8ebf;" parent="1" vertex="1">
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<mxCell id="t2Bh8Tgv82BLZMkkJCVr-153" value="第２个更新操作：<br>创建Statement并执行prepare.executeUpdate()" style="rounded=1;whiteSpace=wrap;html=1;fontSize=10;" parent="1" vertex="1">
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<mxCell id="t2Bh8Tgv82BLZMkkJCVr-155" value="模拟发生运行时异常<br>throw new RuntimeException("test");" style="rounded=1;whiteSpace=wrap;html=1;fontSize=10;" parent="1" vertex="1">
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<mxCell id="t2Bh8Tgv82BLZMkkJCVr-157" value="this.transactionManager.rollback(status)" style="whiteSpace=wrap;html=1;fontSize=10;rounded=1;arcSize=10;" parent="1" vertex="1">
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<mxCell id="t2Bh8Tgv82BLZMkkJCVr-163" value="Y<br>这里捕获异常<br>execute方法中<br>就不会捕获了，<br>除非再抛出" style="edgeStyle=orthogonalEdgeStyle;curved=1;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;exitX=1;exitY=0.5;exitDx=0;exitDy=0;entryX=0;entryY=0.5;entryDx=0;entryDy=0;fontSize=8;fontColor=#007FFF;strokeColor=#000000;" parent="1" source="t2Bh8Tgv82BLZMkkJCVr-160" target="t2Bh8Tgv82BLZMkkJCVr-162" edge="1">
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<mxCell id="t2Bh8Tgv82BLZMkkJCVr-160" value="<font style="font-size: 8px">自行捕获异常？</font>" style="rhombus;whiteSpace=wrap;html=1;fontSize=10;rounded=1;arcSize=10;" parent="1" vertex="1">
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<mxCell id="t2Bh8Tgv82BLZMkkJCVr-162" value="捕获异常后可选择<br>处理措施" style="rounded=1;whiteSpace=wrap;html=1;fontSize=10;" parent="1" vertex="1">
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<mxCell id="3tcmVddGPVW7wgybLThJ-67" value="" style="edgeStyle=orthogonalEdgeStyle;curved=1;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;fontSize=9;fontColor=#007FFF;" parent="1" source="3tcmVddGPVW7wgybLThJ-50" target="3tcmVddGPVW7wgybLThJ-66" edge="1">
<mxGeometry relative="1" as="geometry" />
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<mxCell id="3tcmVddGPVW7wgybLThJ-50" value="status.rollbackToSavepoint(savePoint)<br><font color="#007fff">回滚到保存点</font>" style="rounded=1;whiteSpace=wrap;html=1;fontSize=10;fillColor=#dae8fc;strokeColor=#6c8ebf;" parent="1" vertex="1">
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<mxCell id="3tcmVddGPVW7wgybLThJ-77" value="" style="edgeStyle=orthogonalEdgeStyle;curved=1;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;fontSize=9;fontColor=#007FFF;" parent="1" source="3tcmVddGPVW7wgybLThJ-52" target="3tcmVddGPVW7wgybLThJ-76" edge="1">
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<mxCell id="3tcmVddGPVW7wgybLThJ-52" value="status.setRollbackOnly()<br><font color="#007fff">说是手动触发回滚，只是设置了标志，</font><font color="#cc0066">看后面是怎么处理这个标志回滚的</font>" style="rounded=1;whiteSpace=wrap;html=1;fontSize=10;fillColor=#dae8fc;strokeColor=#6c8ebf;" parent="1" vertex="1">
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<mxCell id="3tcmVddGPVW7wgybLThJ-55" value="getSavepointManager()<br><font color="#007fff" style="font-size: 8px">事务对象实现了SavepointManager接口，所以这里获取的就是DataSourceTransactionObject对象</font>" style="rounded=1;whiteSpace=wrap;html=1;fontSize=10;" parent="1" vertex="1">
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<mxCell id="3tcmVddGPVW7wgybLThJ-57" value="createSavepoint()" style="rounded=1;whiteSpace=wrap;html=1;fontSize=10;" parent="1" vertex="1">
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<mxCell id="3tcmVddGPVW7wgybLThJ-62" value="" style="edgeStyle=orthogonalEdgeStyle;curved=1;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;fontSize=8;fontColor=#007FFF;" parent="1" source="3tcmVddGPVW7wgybLThJ-59" target="3tcmVddGPVW7wgybLThJ-61" edge="1">
<mxGeometry relative="1" as="geometry" />
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<mxCell id="3tcmVddGPVW7wgybLThJ-59" value="conHolder = getConnectionHolderForSavepoint()" style="rounded=1;whiteSpace=wrap;html=1;fontSize=10;" parent="1" vertex="1">
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</mxCell>
<mxCell id="3tcmVddGPVW7wgybLThJ-65" value="" style="edgeStyle=orthogonalEdgeStyle;curved=1;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;fontSize=8;fontColor=#007FFF;" parent="1" source="3tcmVddGPVW7wgybLThJ-61" target="3tcmVddGPVW7wgybLThJ-64" edge="1">
<mxGeometry relative="1" as="geometry" />
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<mxCell id="3tcmVddGPVW7wgybLThJ-61" value="return conHolder.createSavepoint()" style="rounded=1;whiteSpace=wrap;html=1;fontSize=10;" parent="1" vertex="1">
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<mxCell id="3tcmVddGPVW7wgybLThJ-63" value="JdbcTransactionObjectSupport" style="text;html=1;align=center;verticalAlign=middle;resizable=0;points=[];autosize=1;strokeColor=none;fillColor=none;fontSize=8;fontColor=#007FFF;" parent="1" vertex="1">
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<mxCell id="3tcmVddGPVW7wgybLThJ-64" value="this.savepointCounter++<br>return <b>getConnection()</b>.<b>setSavepoint</b>(<br>SAVEPOINT_NAME_PREFIX + this.savepointCounter)" style="rounded=1;whiteSpace=wrap;html=1;fontSize=10;fillColor=#d5e8d4;strokeColor=#82b366;" parent="1" vertex="1">
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<mxCell id="3tcmVddGPVW7wgybLThJ-66" value="getSavepointManager()<br>.rollbackToSavepoint(savepoint)" style="rounded=1;whiteSpace=wrap;html=1;fontSize=10;" parent="1" vertex="1">
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<mxCell id="3tcmVddGPVW7wgybLThJ-68" value="conHolder = getConnectionHolderForSavepoint()" style="rounded=1;whiteSpace=wrap;html=1;fontSize=10;" parent="1" vertex="1">
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<mxCell id="3tcmVddGPVW7wgybLThJ-70" value="conHolder.getConnection()<br>.rollback((Savepoint) savepoint)" style="rounded=1;whiteSpace=wrap;html=1;fontSize=10;fillColor=#d5e8d4;strokeColor=#82b366;" parent="1" vertex="1">
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<mxCell id="3tcmVddGPVW7wgybLThJ-72" value="conHolder.resetRollbackOnly()" style="rounded=1;whiteSpace=wrap;html=1;fontSize=10;" parent="1" vertex="1">
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<mxCell id="3tcmVddGPVW7wgybLThJ-74" value="this.rollbackOnly = false" style="rounded=1;whiteSpace=wrap;html=1;fontSize=10;" parent="1" vertex="1">
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<mxCell id="xfdcjk_qxBO9EsxSu5Ji-20" value="<div><font style="font-size: 9px">&nbsp;status = <b>newTransactionStatus</b>(</font></div><div>				<font style="font-size: 9px">definition, transaction, newTransaction, newSynchronization, debug, suspendedResources)</font></div>" style="whiteSpace=wrap;html=1;fontSize=9;rounded=1;arcSize=10;" parent="1" vertex="1">
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<mxCell id="xfdcjk_qxBO9EsxSu5Ji-23" value="<span style="font-size: 10px"><b>prepareSynchronization</b>(status, definition);<br></span>return status;" style="whiteSpace=wrap;html=1;fontSize=9;rounded=1;arcSize=10;" parent="1" vertex="1">
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<mxCell id="xfdcjk_qxBO9EsxSu5Ji-26" value="<span style="font-size: 10px"><b>prepareTransactionStatus</b>(definition, <b>transaction</b>, false, <b>newSynchronization</b>, debugEnabled, null)</span>" style="whiteSpace=wrap;html=1;fontSize=9;rounded=1;arcSize=10;" parent="1" vertex="1">
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<mxCell id="xfdcjk_qxBO9EsxSu5Ji-28" value="if (status.isNewSynchronization())：<br>TransactionSynchronizationUtils.triggerBeforeCompletion()<br><font color="#007fff">要求是新绑定的事务同步器才触发</font>" style="whiteSpace=wrap;html=1;fontSize=10;rounded=1;arcSize=10;" parent="1" vertex="1">
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<mxCell id="xfdcjk_qxBO9EsxSu5Ji-31" value="<div style="text-align: left ; font-size: 10px"><span>比如</span><span>PROPAGATION_REQUIRED，外部已有事务的情况下，对内层来说这里status（就是外部事务的status）内部不是新绑定的事务同步器，而是用的外部事务的事务同期器，内部当然不能执行，否则回到外部会再执行一次就重复了</span></div>" style="text;html=1;strokeColor=none;fillColor=none;align=center;verticalAlign=middle;whiteSpace=wrap;rounded=0;fontSize=8;fontColor=#007FFF;" parent="1" vertex="1">
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<mxCell id="xfdcjk_qxBO9EsxSu5Ji-32" value="DataSourceTransactionObject txObject = (DataSourceTransactionObject) status.<b>getTransaction</b>()" style="whiteSpace=wrap;html=1;fontSize=10;rounded=1;arcSize=10;" parent="1" vertex="1">
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<mxCell id="xfdcjk_qxBO9EsxSu5Ji-34" value="synchronizations = TransactionSynchronizationManager<br>.getSynchronizations()" style="whiteSpace=wrap;html=1;fontSize=10;rounded=1;arcSize=10;" parent="1" vertex="1">
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<mxCell id="xfdcjk_qxBO9EsxSu5Ji-36" value="<font style="font-size: 9px">status<br>.isNewSynchronization()<br><font color="#007fff">同样需要判断是否是<br>新事务同步器</font><br></font>" style="rhombus;whiteSpace=wrap;html=1;fontSize=10;rounded=1;arcSize=10;" parent="1" vertex="1">
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<mxCell id="xfdcjk_qxBO9EsxSu5Ji-107" value="这不重复了么？上面的应该可以删掉" style="edgeStyle=orthogonalEdgeStyle;curved=1;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;exitX=1;exitY=1;exitDx=0;exitDy=0;entryX=1;entryY=0;entryDx=0;entryDy=0;fontSize=9;fontColor=#007FFF;strokeColor=#97D077;" parent="1" source="xfdcjk_qxBO9EsxSu5Ji-39" target="xfdcjk_qxBO9EsxSu5Ji-48" edge="1">
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