Question

我有以下结构。

<int:publish-subscribe-channel id="updateProjectRequest" />
<int:channel id="aggregate-project"/>

<int:service-activator input-channel="updateProjectRequest" output-channel="aggregate-project" ref="updateProjectResponseHandler" method="createFolder"/>
<int:service-activator input-channel="updateProjectRequest" output-channel="aggregate-project" ref="updateProjectResponseHandler" method="createRepo"/>

<int:aggregator input-channel="aggregate-project"  ref="projectAggregator">

以下是我的Aggregator类。

@Component("projectAggregator")
public class ProjectAggregator {

@Aggregator
public boolean aggregatingMethod(List<Map<String, List<Project>>> items) {
//////// CODE //////
}

@ReleaseStrategy
public boolean releaseChecker(List<Message<?>> messages) {
//////CODE/////
}

@CorrelationStrategy
public Map<String, List<Project>> correlateBy(Map<String, List<Project>> item) {
    return item;
}

问题是，如果我在@ReleaseStrategy方法中打印消息长度，它总是保持为1.根据我的知识，它应该增加。能否帮我找到上述代码的错误。

Answer 1

如果您以后想要汇总发送给发布/订阅频道订阅者的消息，则需要将apply-sequence设置为true。

如果为true，则correlationId和序列信息将添加到邮件标题中。

<xsd:attribute name="apply-sequence" type="xsd:string" default="false">
    <xsd:annotation>
        <xsd:documentation>
            Specify whether the sequence size, sequence number, and correlation id
            headers should be set on
            Messages that are sent through this channel.
        </xsd:documentation>
    </xsd:annotation>
</xsd:attribute>

Spring-Integration Aggregator无法正常工作。

1 个答案: