我正在使用spring integration（<int-ftp:outbound-gateway >）从ftp服务器检索文件，
首先，如果远程目录中没有文件，我无法继续该程序，我可以解决这个问题，将default-reply-timeout="100"添加到<int:gateway>，添加后我得到零点异常导致构建失败。
这是我的完整配置文件
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:int="http://www.springframework.org/schema/integration"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:int-ftp="http://www.springframework.org/schema/integration/ftp"
xsi:schemaLocation="http://www.springframework.org/schema/integration/ftp
http://www.springframework.org/schema/integration/ftp/spring-integration-ftp.xsd
http://www.springframework.org/schema/integration
http://www.springframework.org/schema/integration/spring-integration.xsd
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd">
<context:property-placeholder location="classpath:host.properties"/>
<int:gateway id="gw" service-interface="com.util.ToFtpFlowGateway"
default-request-channel="inbound" default-reply-timeout="100"/>
<bean id="downloadProcessBean" class="com.util.FTPDownloadInterceptor">
<property name="fileType" value="txt"/>
<property name="sourceType" value="ftp"/>
<property name="destinationName" value="destinationName"/>
<property name="destinationQueName" value="destinationQueName"/>
<property name="sourceAddressDetails" value="sourceAddressDetails"/>
<property name="sourceName" value="sourceName"/>
</bean>
<bean id="ftpSessionFactory"
class="org.springframework.integration.ftp.session.DefaultFtpSessionFactory">
<property name="host" value="${local.host}"/>
<property name="port" value="${local.availableServerPort}"/>
<property name="username" value="${local.userid}"/>
<property name="password" value="${local.user.password}"/>
</bean>
<int-ftp:outbound-gateway id="gatewayLS" cache-sessions="false"
session-factory="ftpSessionFactory"
request-channel="inbound"
command="ls"
command-options=""
expression="payload"
reply-channel="toSplitter" />
<int:channel id="toSplitter">
<int:interceptors>
<int:wire-tap channel="logger"/>
</int:interceptors>
</int:channel>
<int:logging-channel-adapter id="logger" log-full-message="true" />
<int:splitter id="splitter" input-channel="toSplitter" output-channel="toGet"/>
<int-ftp:outbound-gateway id="gatewayGET" cache-sessions="false"
local-directory="/home/udeshika/project/sxpmsg-distributer/req/local/download"
session-factory="ftpSessionFactory"
request-channel="toGet"
reply-channel="toRemoveChannel"
command="get"
command-options="-P"
expression="payload.remoteDirectory + '/' + payload.filename" reply-timeout="10"/>
<int-ftp:outbound-gateway id="gatewayRM"
session-factory="ftpSessionFactory" cache-sessions="false"
expression="payload.remoteDirectory + '/'+ payload.filename"
request-channel="toRemoveChannel"
command="rm"
reply-channel="aggregateResultsChannel"
auto-create-local-directory="true"
reply-timeout="10"
/>
<!--<bean id="fileDownloadIntecepter" class="shipxpress.util.FTPDownloadInterceptor"/>-->
<int:channel id="toRemoveChannel">
<int:interceptors>
<int:wire-tap channel="logger2"/>
<!--<int:ref bean="fileDownloadIntecepter" />-->
</int:interceptors>
</int:channel>
<bean class="org.springframework.integration.file.FileReadingMessageSource"
p:directory="${download.directory}"/>
<int:logging-channel-adapter id="logger2" log-full-message="true" />
<int-ftp:outbound-gateway id="gatewayRM"
session-factory="ftpSessionFactory" cache-sessions="false"
expression="headers['file_remoteDirectory'] + '/' + headers['file_remoteFile']"
request-channel="toRemoveChannel"
command="rm"
reply-channel="aggregateResultsChannel"/>
<int:aggregator input-channel="aggregateResultsChannel"/>
</beans>
java代码
rmResults = toFtpFlow.lsGetAndRmFiles("testftp");
if(null == rmResults)[
LOGGER.info("Null returned");
}
错误消息
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 9.200s
[INFO] Finished at: Thu Jun 20 15:48:43 IST 2013
[INFO] Final Memory: 15M/84M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.codehaus.mojo:exec-maven-plugin:1.1.1:java (default) on project ftp: An exception occured while executing the Java class. null: InvocationTargetException: message must not be null -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException