我有一个Mule流来从PostgreSQL数据库中的表中获取数据,并将数据转换为XML格式并写入文件:
<mule ...>
<spring:bean id="Postgres-jdbcDataSource"
class="org.enhydra.jdbc.standard.StandardDataSource" destroy-method="shutdown">
<spring:property name="driverName" value="org.postgresql.Driver" />
<spring:property name="url"
value="jdbc:postgresql://host:port/schema?user=username&password=password" />
</spring:bean>
<jdbc:connector name="Postgres-jdbcConnector"
dataSource-ref="Postgres-jdbcDataSource" pollingFrequency="60000"
transactionPerMessage="false">
<jdbc:query key="read" value="SELECT * FROM tablename" />
</jdbc:connector>
<file:connector name="file_connector" fileAge="500"
streaming="false" pollingFrequency="60000" />
<flow name="Postgres-flow">
<jdbc:inbound-endpoint queryKey="read"
connector-ref="Postgres-jdbcConnector">
<jdbc:transaction action="ALWAYS_BEGIN" />
<property key="receiveMessageInTransaction" value="true" />
</jdbc:inbound-endpoint>
<custom-transformer name="Postgres-transformer"
class="com.example.transformer.DbToXmlTransformer" ignoreBadInput="false"
encoding="UTF-8" />
<file:outbound-endpoint connector-ref="file_connector"
path="/home/path" outputPattern="file.xml" responseTimeout="10000"
encoding="UTF-8" />
</flow>
</mule>
当我运行此流程时,流程不会从DB获取数据并写入文件。它也不会抛出任何错误或异常。但是当我为MySQL或SQLServer数据库运行相同的流程时,相应地更改driverName和url属性,流程工作正常。
知道为什么Postgres数据库不起作用?可能它需要不同的DataSource类?
答案 0 :(得分:2)
还有一个用于mule的Postgre数据源,您可以使用它代替spring bean:
<jdbc:postgresql-data-source name="PostgreSQL_Data_Source" user="your user name" password="your pwd" url="jdbc:postgresql://localhost:5432/TestDB" transactionIsolation="UNSPECIFIED" doc:name="PostgreSQL Data Source"/>
无论如何......,使用现有配置,您可以通过将JDBC入站端点保留在poll组件中并在File outbound之前放置一个记录器来检查有效负载值来进行检查。如果它得到了记录器中的有效负载值..这意味着它正在获取值..让我知道它是否有效......您可以尝试以下方法: -
<mule ...>
<spring:bean id="Postgres-jdbcDataSource"
class="org.enhydra.jdbc.standard.StandardDataSource" destroy-method="shutdown">
<spring:property name="driverName" value="org.postgresql.Driver" />
<spring:property name="url"
value="jdbc:postgresql://host:port/schema?user=username&password=password" />
</spring:bean>
<jdbc:connector name="Postgres-jdbcConnector"
dataSource-ref="Postgres-jdbcDataSource" pollingFrequency="60000"
transactionPerMessage="false">
<jdbc:query key="read" value="SELECT * FROM tablename" />
</jdbc:connector>
<file:connector name="file_connector" fileAge="500"
streaming="false" pollingFrequency="60000" />
<flow name="Postgres-flow">
<poll frequency="1000" doc:name="Poll">
<jdbc:inbound-endpoint queryKey="read"
connector-ref="Postgres-jdbcConnector">
<jdbc:transaction action="ALWAYS_BEGIN" />
<property key="receiveMessageInTransaction" value="true" />
</jdbc:inbound-endpoint>
</poll>
<!-- You can also use object to xml transformer if you are not using any custom transformer -->
<!--<mulexml:object-to-xml-transformer doc:name="Object to XML"/> -->
<custom-transformer name="Postgres-transformer"
class="com.example.transformer.DbToXmlTransformer" ignoreBadInput="false"
encoding="UTF-8" />
<logger message="Payload :- #[message.payload]" level="INFO" doc:name="Logger"/>
<file:outbound-endpoint connector-ref="file_connector"
path="/home/path" outputPattern="file.xml" responseTimeout="10000"
encoding="UTF-8" />
</flow>
</mule>
有关更多信息,请参阅此处有关Mule的Postgre数据库的参考: - http://www.dotnetfunda.com/articles/show/2068/using-mule-studio-to-read-data-from-postgresqlinbound-and-write-it-to