I can't get FTP to work using Spring Integration - ftp

Question

I am trying to setup my application to receive files using Spring Integration (version 2.2.0.RELEASE).
When I start Tomcat (where application is deployed), I get the following error message. Anyone has an idea why?
SEVERE: Error configuring application listener of class com.xxxx.aaa.web.mvc.context.CccccContextListener
java.lang.NoClassDefFoundError: com/xxxx/bbb/application/core/exception/unchecked/InvalidFormatException
at java.lang.Class.getDeclaredConstructors0(Native Method)
at java.lang.Class.privateGetDeclaredConstructors(Class.java:2389)
at java.lang.Class.getConstructor0(Class.java:2699)
at java.lang.Class.newInstance0(Class.java:326)
at java.lang.Class.newInstance(Class.java:308)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4079)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4630)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:785)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:445)
at org.apache.catalina.core.StandardService.start(StandardService.java:519)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:710)
at org.apache.catalina.startup.Catalina.start(Catalina.java:581)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)
Caused by: java.lang.ClassNotFoundException: com.xxxx.bbb.application.core.exception.unchecked.InvalidFormatException
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1645)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1491)
... 20 more
I believe the error message above is a red herring. Before adding the spring integration dependency to the pom file and having the ftp config file, Tomcat was starting successfully.
I use Java6 and Tomcat6. My FTP config file is:
<?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:int="http://www.springframework.org/schema/integration"
xmlns:int-ftp="http://www.springframework.org/schema/integration/ftp"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/integration
http://www.springframework.org/schema/integration/spring-integration-2.2.xsd
http://www.springframework.org/schema/integration/ftp
http://www.springframework.org/schema/integration/ftp/spring-integration-ftp-2.2.xsd">
<int:channel id="ftpChannel">
<int:queue/>
</int:channel>
<bean id="ftpClientFactory"
class="org.springframework.integration.ftp.session.DefaultFtpSessionFactory">
<property name="host" value="localhost" />
<property name="port" value="21" />
<property name="username" value="user" />
<property name="password" value="password" />
</bean>
<int-ftp:inbound-channel-adapter
id="ftpInbound"
channel="ftpChannel"
filename-pattern="*.csv"
session-factory="ftpClientFactory"
auto-create-local-directory="true"
delete-remote-files="true"
remote-directory="/"
local-directory="C:/folder/IN">
<int:poller fixed-rate="1000" max-messages-per-poll="15"/>
</int-ftp:inbound-channel-adapter>
</beans>
I added dependency in the pom file as follows :
<dependency>
<groupId>org.springframework.integration</groupId>
<artifactId>spring-integration-ftp</artifactId>
<version>2.2.0.RELEASE</version>
</dependency>

Answer 1

Actually Spring Integration requires Spring core version 3.0.5 at least whereas I had it set to 3.0.2. Once I upgraded spring core to 3.0.5, it worked.