问题
I am using Spring Integration to poll a directory for a File, process this file in a service class, write this file to an output directory and then delete the original file.
I have the following XML configuration:
<int-file:inbound-channel-adapter id="filesInChannel"
directory="file:${java.io.tmpdir}/input"
auto-create-directory="true" >
<int:poller id="poller" fixed-delay="1000" />
</int-file:inbound-channel-adapter>
<int:service-activator id="servicActivator"
input-channel="filesInChannel"
output-channel="filesOut"
ref="my_file_processing_service">
</int:service-activator>
<int-file:outbound-channel-adapter id="filesOut" auto-create-directory="true" delete-source-files="true" directory="file:${java.io.tmpdir}/output"/>
This polls the file, passes it to my processing_service and copies it to the outbound directory. However the original file is not being deleted. Does anyone have any idea as to why not?
回答1:
I know that the question was asked a long time ago but maybe the answer will be useful to someone else.
The reason why the input file is not deleted is provided in the Spring Integration Reference:
The
delete-source-files
attribute will only have an effect if the inbound Message has a File payload or if theFileHeaders.ORIGINAL_FILE
header value contains either the source File instance or a String representing the original file path.
Your message does not contain this particular header. If you use one of the standard file transformers (FileToStringTransformer
and FileToByteArrayTransformer
) it will be set automatically. Alternatively you can set it manually using a header enricher.
Behind the scenes something like this is happening in the file transformers:
...
Message<?> transformedMessage = MessageBuilder.withPayload(result)
.copyHeaders(message.getHeaders())
.setHeaderIfAbsent(FileHeaders.ORIGINAL_FILE, file)
.setHeaderIfAbsent(FileHeaders.FILENAME, file.getName())
.build();
...
回答2:
From the documentation http://static.springsource.org/spring-integration/reference/html/files.html
<int-file:outbound-gateway id="mover" request-channel="moveInput"
reply-channel="output"
directory="${output.directory}"
mode="REPLACE" delete-source-files="true"/>
I don't know how to do this on the inbound-channel-adapter(which I think makes sense)
来源:https://stackoverflow.com/questions/12707149/spring-integration-delete-file-in-outbound-channel-adapter