Mule ESB - 两个文件作为输入(同时等待)

Question

我想在哪里做一个流程:

等待两个文件:file_name.xdf 和 file_name.dff :如果两个文件(我想同时处理两个文件(等待两个文件)，这些文件的文件名应该相同)

处理这些文件转换为字节数组

运行 groovy 脚本

我怎样才能提出第一点？

Answer 1

您可以根据文件的“基本名称”聚合文件(即取不带扩展名的文件名)，然后处理聚合集中的每个文件。

可以使用 Collection-Aggregator 或 Custom-Aggregator 执行聚合，这里每个示例都有一个示例:

使用集合聚合器:

<flow name="two-files-per-process-with-collection-aggregator">
    <file:inbound-endpoint path="/file-in" moveToDirectory="/file-in-process" responseTimeout="10000" doc:name="Read files" >
        <file:filename-regex-filter pattern=".*\.aaa|.*\.bbb" caseSensitive="true"/>
    </file:inbound-endpoint>
    <set-property propertyName="MULE_CORRELATION_ID" value="#[message.inboundProperties.originalFilename.substring(0,message.inboundProperties.originalFilename.lastIndexOf('.'))]" doc:name="Set Correlation-Id"/>
    <set-property propertyName="MULE_CORRELATION_GROUP_SIZE" value="2" doc:name="Set Correlation-Group-Size"/>
    <collection-aggregator failOnTimeout="true" doc:name="Collection Aggregator"/>
    <foreach doc:name="For Each">
        <logger message="#[message.inboundProperties.originalFilename]" level="INFO" doc:name="Some process"/>
    </foreach>
</flow>

使用自定义聚合器(您将需要自定义 java 类):

<flow name="two-files-per-process-with-custom-aggregator">
    <file:inbound-endpoint path="/file-in" moveToDirectory="/file-in-process" responseTimeout="10000" doc:name="Read files">
        <file:filename-regex-filter pattern=".*\.aaa|.*\.bbb" caseSensitive="true"/>
    </file:inbound-endpoint>
    <custom-aggregator failOnTimeout="true" class="org.mnc.MatchFileNames" doc:name="Custom Aggregator"/>
    <foreach doc:name="For Each">
        <logger message="#[message.inboundProperties.originalFilename]" level="INFO" doc:name="Some process"/>
    </foreach>
</flow>

这是自定义聚合器的可能实现(它可能更优雅:

package org.mnc;

import org.mule.api.MuleContext;
import org.mule.api.MuleEvent;
import org.mule.api.routing.RoutingException;
import org.mule.routing.AbstractAggregator;
import org.mule.routing.EventGroup;
import org.mule.routing.correlation.EventCorrelatorCallback;

public class MatchFileNames extends AbstractAggregator {

    @Override
    protected EventCorrelatorCallback getCorrelatorCallback(final MuleContext muleContext) {
        return new EventCorrelatorCallback() {

            @Override
            public boolean shouldAggregateEvents(EventGroup events) {
                return events.size()==2;
            }

            @Override
            public EventGroup createEventGroup(MuleEvent event, Object id) {
                String filename = event.getMessage().getInboundProperty("originalFilename");
                String commonFilename = filename.substring(0, filename.lastIndexOf('.'));
                System.out.println(filename + " -> " + commonFilename);
                return new EventGroup(commonFilename, muleContext, 2, true, storePrefix);
            }

            @Override
            public MuleEvent aggregateEvents(EventGroup events) throws RoutingException {
                return events.getMessageCollectionEvent();
            }
        };
    }
}