Chapter 147. Zip File

When using zipfile with Red Hat build of Camel Spring Boot make sure to use the following Maven dependency to have support for auto configuration:

<dependency>
  <groupId>org.apache.camel.springboot</groupId>
  <artifactId>camel-zipfile-starter</artifactId>
</dependency>

The Zip File dataformat supports 4 options, which are listed below.

In this example we marshal a regular text/XML payload to a compressed payload using Zip file compression, and send it to an ActiveMQ queue called MY_QUEUE.

from("direct:start")
    .marshal().zipFile()
    .to("activemq:queue:MY_QUEUE");

The name of the Zip entry inside the created Zip file is based on the incoming CamelFileName message header, which is the standard message header used by the file component. Additionally, the outgoing CamelFileName message header is automatically set to the value of the incoming CamelFileName message header, with the ".zip" suffix. So for example, if the following route finds a file named "test.txt" in the input directory, the output will be a Zip file named "test.txt.zip" containing a single Zip entry named "test.txt":

from("file:input/directory?antInclude=*/.txt")
    .marshal().zipFile()
    .to("file:output/directory");

If there is no incoming CamelFileName message header (for example, if the file component is not the consumer), then the message ID is used by default, and since the message ID is normally a unique generated ID, you will end up with filenames like ID-MACHINENAME-2443-1211718892437-1-0.zip. If you want to override this behavior, then you can set the value of the CamelFileName header explicitly in your route:

from("direct:start")
    .setHeader(Exchange.FILE_NAME, constant("report.txt"))
    .marshal().zipFile()
    .to("file:output/directory");

This route would result in a Zip file named "report.txt.zip" in the output directory, containing a single Zip entry named "report.txt".

In this example we unmarshal a Zip file payload from an ActiveMQ queue called MY_QUEUE to its original format, and forward it for processing to the UnZippedMessageProcessor.

from("activemq:queue:MY_QUEUE")
    .unmarshal().zipFile()
    .process(new UnZippedMessageProcessor());

If the zip file has more then one entry, the usingIterator option of ZipFileDataFormat to be true, and you can use splitter to do the further work.

ZipFileDataFormat zipFile = new ZipFileDataFormat();
zipFile.setUsingIterator(true);

from("file:src/test/resources/org/apache/camel/dataformat/zipfile/?delay=1000&noop=true")
    .unmarshal(zipFile)
    .split(body(Iterator.class)).streaming()
        .process(new UnZippedMessageProcessor())
    .end();

Or you can use the ZipSplitter as an expression for splitter directly like this

from("file:src/test/resources/org/apache/camel/dataformat/zipfile?delay=1000&noop=true")
    .split(new ZipSplitter()).streaming()
        .process(new UnZippedMessageProcessor())
    .end();

from("file:input/directory?antInclude=*/.txt")
    .aggregate(constant(true), new ZipAggregationStrategy())
        .completionFromBatchConsumer().eagerCheckCompletion()
        .to("file:output/directory");

from("file:input/directory?antInclude=*/.txt")
    .aggregate(constant(true), new ZipAggregationStrategy())
        .completionFromBatchConsumer().eagerCheckCompletion()
        .setHeader(Exchange.FILE_NAME, constant("reports.zip"))
        .to("file:output/directory");

The component supports 5 options, which are listed below.