Apache camel 如何与JDBC一起使用ApacheCamel

ApacheCamel 2.12.1

我的路线设置如下：

 public void configure() throws Exception {
                from("direct:start")
                        .process(new AuthorizationHeaderProcessor(configureCreds()))
                        .to(httpSourceEndpoint)

                        .process(new GenerateSQLFromMessageProcessor))
                        .enrich("jdbc:dataSource", new DBAggregator())
                        //...do things with result...

public void configure() throws Exception {
            from("direct:start")
                    .process(new AuthorizationHeaderProcessor(configureCreds()))
                    .to(httpSourceEndpoint)

                    .setHeader(new BeanExpression(MySQLBean.class, "methodToGenerateSQL")
                    .enrich("jdbc:dataSource", new DBAggregator())
                    //...do things with result...

public class DBAggregator implements AggregationStrategy {

@Override
public Exchange aggregate(Exchange oldExchange, Exchange newExchange) {

Here I have:
    oldExchange = the resulting SQL string that methodToGenerateSQL generated
    newExchange = the result set from the SQL query

1 HttpSourceEndPoint是来自某个url的get请求

2然后我想使用这个结果按照GenerateSQLFromMessageProcessor生成SQL，它作为JDBC路由的输入提供

我的问题是，在DBAggregator中，通过的参数是：

oldExchange = the raw SQL string that was sent to the JDBC call
newExchange = the result set from the DB query

ie没有来自http源端点的原始消息的迹象，这正是我所期望的聚合工作方式。我应该如何组合这两条流？是GenerateSQLFromMessageProcessor调用消耗了原始消息吗？如果是这样的话，您应该在bean中为一个实例指定SQL吗

编辑

因此，在标题中设置如下：

 public void configure() throws Exception {
                from("direct:start")
                        .process(new AuthorizationHeaderProcessor(configureCreds()))
                        .to(httpSourceEndpoint)

                        .process(new GenerateSQLFromMessageProcessor))
                        .enrich("jdbc:dataSource", new DBAggregator())
                        //...do things with result...

public void configure() throws Exception {
            from("direct:start")
                    .process(new AuthorizationHeaderProcessor(configureCreds()))
                    .to(httpSourceEndpoint)

                    .setHeader(new BeanExpression(MySQLBean.class, "methodToGenerateSQL")
                    .enrich("jdbc:dataSource", new DBAggregator())
                    //...do things with result...

public class DBAggregator implements AggregationStrategy {

@Override
public Exchange aggregate(Exchange oldExchange, Exchange newExchange) {

Here I have:
    oldExchange = the resulting SQL string that methodToGenerateSQL generated
    newExchange = the result set from the SQL query

我的聚合器中的结果如下所示：

 public void configure() throws Exception {
                from("direct:start")
                        .process(new AuthorizationHeaderProcessor(configureCreds()))
                        .to(httpSourceEndpoint)

                        .process(new GenerateSQLFromMessageProcessor))
                        .enrich("jdbc:dataSource", new DBAggregator())
                        //...do things with result...

public void configure() throws Exception {
            from("direct:start")
                    .process(new AuthorizationHeaderProcessor(configureCreds()))
                    .to(httpSourceEndpoint)

                    .setHeader(new BeanExpression(MySQLBean.class, "methodToGenerateSQL")
                    .enrich("jdbc:dataSource", new DBAggregator())
                    //...do things with result...

public class DBAggregator implements AggregationStrategy {

@Override
public Exchange aggregate(Exchange oldExchange, Exchange newExchange) {

Here I have:
    oldExchange = the resulting SQL string that methodToGenerateSQL generated
    newExchange = the result set from the SQL query

问题是我无法访问来自httpSourceEndpoint的原始消息

由于这是一个聚合器，我希望oldExchange是传入消息，而不仅仅是SQL字符串。 毕竟，它是一个聚合器，但我实际上已经丢失了传入的消息-这并不是在丰富内容

谢谢，

---

Mr Tea

将SQL查询字符串放在标题中没有问题。结果是相同的问题-原始消息在聚合器中不可用。您只获得生成的SQL字符串和查询结果，而不是传入消息。然后将传入消息放入头中。你说你使用聚合器？你的代码太不完整，无法理解你在做什么。我已经添加了更多。。。