我想使用spring-integration列出FTP服务器上的所有文件,例如,在屏幕上打印它们。我已经做了这样的事情:
语境:
<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="getFtpChannel"/>
<int-ftp:outbound-gateway id="gatewayLS"
session-factory="ftpClientFactory"
request-channel="inbound"
command="ls"
expression="payload"
reply-channel="toSplitter"/>
<int:channel id="getFtpChannel">
<int:queue/>
</int:channel>
<bean id="ftpClientFactory"
class="org.springframework.integration.ftp.session.DefaultFtpSessionFactory">
<property name="host" value="${host}"/>
<property name="username" value="${user}"/>
<property name="password" value="${password}"/>
<property name="clientMode" value="0"/>
<property name="fileType" value="2"/>
<property name="bufferSize" value="10000000"/>
</bean>
Java代码:
ConfigurableApplicationContext context =
new FileSystemXmlApplicationContext("/src/citrus/resources/citrus-context.xml");
final FtpFlowGateway ftpFlow = context.getBean(FtpFlowGateway.class);
ftpFlow.lsFiles("/");
PollableChannel channel = context.getBean("getFtpChannel", PollableChannel.class);
variable("tt", channel.receive().toString());
echo("${tt}");
输出:
11:09:17,169 INFO port.LoggingReporter| Test action <echo>
11:09:17,169 INFO actions.EchoAction| [Payload=FileInfo [isDirectory=false, isLink=false, Size=3607, ModifiedTime=Tue Jul 15 14:18:00 CEST 2014, Filename=Smoke03_angart30_st40.exi, RemoteDirectory=/, Permiss
ions=-rw-r--r--]][Headers= {replyChannel=org.springframework.integration.core.MessagingTemplate$TemporaryReplyChannel@7829b776, sequenceNumber=1, errorChannel=org.springframework.integration.core.MessagingTempla
te$TemporaryReplyChannel@7829b776, file_remoteDirectory=/, sequenceSize=1, correlationId=49b57f2d-4dbf-4a89-b5b8-0dfb15bca2be, id=0a58ad65-74b4-4aae-87be- aa6034a41776, timestamp=1405501757060}]
11:09:17,169 INFO port.LoggingReporter| Test action <echo> done
11:09:17,169 INFO port.LoggingReporter| TEST STEP 1/1 done
输出很好,但是当我不知道FTP上存储了多少文件时,该怎么做才能打印此信息?(此代码仅打印一个文件)。我试过检查是否channel.receive()
为空,但测试只是冻结。
既然你发送的结果LS
给<splitter>
,你getFtpChannel
将收到FileInfo<?>
的对象一个接一个。
要打印它们,您实际上应该有一个无限循环:
while (true) {
variable("tt", channel.receive().toString());
echo("${tt}");
}
要停止该应用程序,您应该提供一些内容shoutDownHook
或从控制台输入中监听一些内容。
还有一点,用infinite阻止应用程序是不好的receive()
。没有重载方法,该方法会应用timeout
参数。最后一个可能对确定循环的结束很有用:
while (true) {
Message<?> receive = channel.receive(10000);
if (receive == null) {
break;
}
variable("tt", receive.toString());
echo("${tt}");
}
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