我正在使用 jdbc 支持的 camel:aggregate,它似乎不保存 Exchange 属性。例如,如果我配置以下路由,并且在聚合完成后且在执行camel:to(log)之前停止执行,强制聚合在重新启动时从数据库检索数据,则camel:to(log)将不会打印属性myProperty
<camel:route id="myRoute">
<camel:from uri="direct:in"/>
<camel:setProperty propertyName="myProperty">
<camel:constant>myPropertyValue</camel:constant>
</camel:setProperty>
<camel:aggregate strategyRef="myStrategy" aggregationRepositoryRef="myAggregationRepo" discardOnCompletionTimeout="true" completionTimeout="86400000" >
<camel:correlationExpression>
<camel:simple>${property.partlastcorrelationkey}</camel:simple>
</camel:correlationExpression>
<camel:completionPredicate>
<camel:simple>${property.partlastcorrelationwaitmore} == false</camel:simple>
</camel:completionPredicate>
<camel:to uri="log:com.test?showAll=true"/>
</camel:aggregate>
</camel:route>
我的聚合存储库是这样配置的:
<bean id="myAggregationRepo" class="org.apache.camel.processor.aggregate.jdbc.JdbcAggregationRepository" init-method="start" destroy-method="stop">
<property name="transactionManager" ref="transactionManager"/>
<property name="repositoryName" value="PROC_AGG"/>
<property name="dataSource" ref="oracle-ds"/>
<property name="lobHandler">
<bean class="org.springframework.jdbc.support.lob.OracleLobHandler">
<property name="nativeJdbcExtractor">
<bean class="org.springframework.jdbc.support.nativejdbc.CommonsDbcpNativeJdbcExtractor"/>
</property>
</bean>
</property>
</bean>
使用聚合器时如何保存属性?
最佳答案
我自己回复吧。如代码所示,JdbcCamelCodec 在使用数据库支持聚合器时不允许保存属性:
public final class JdbcCamelCodec {
public byte[] marshallExchange(CamelContext camelContext, Exchange exchange) throws IOException {
// use DefaultExchangeHolder to marshal to a serialized object
DefaultExchangeHolder pe = DefaultExchangeHolder.marshal(exchange, false);
// add the aggregated size property as the only property we want to retain
DefaultExchangeHolder.addProperty(pe, Exchange.AGGREGATED_SIZE, exchange.getProperty(Exchange.AGGREGATED_SIZE, Integer.class));
// add the aggregated completed by property to retain
DefaultExchangeHolder.addProperty(pe, Exchange.AGGREGATED_COMPLETED_BY, exchange.getProperty(Exchange.AGGREGATED_COMPLETED_BY, String.class));
// add the aggregated correlation key property to retain
DefaultExchangeHolder.addProperty(pe, Exchange.AGGREGATED_CORRELATION_KEY, exchange.getProperty(Exchange.AGGREGATED_CORRELATION_KEY, String.class));
// persist the from endpoint as well
if (exchange.getFromEndpoint() != null) {
DefaultExchangeHolder.addProperty(pe, "CamelAggregatedFromEndpoint", exchange.getFromEndpoint().getEndpointUri());
}
return encode(pe);
}
基本上,问题出在这一行,其中 false 表示:不保存属性。
DefaultExchangeHolder pe = DefaultExchangeHolder.marshal(exchange, false);
标题和正文是唯一存储在数据库中的内容。
关于jdbc - Camel : Aggregator doesn't persist Exchange properties,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/14685918/