Chapter 136. Zip File The Zip File Data Format is a message compression and de-compression format. Messages can be marshalled (compressed) to Zip files containing a single entry, and Zip files containing a single entry can be unmarshalled (decompressed) to the original file contents. This data format supports ZIP64, as long as Java 7 or later is being used]. 136.1. Dependencies 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> 136.2. ZipFile Options The Zip File dataformat supports 4 options, which are listed below. Name Default Java Type Description usingIterator Boolean If the zip file has more then one entry, the setting this option to true, allows to work with the splitter EIP, to split the data using an iterator in a streaming mode. allowEmptyDirectory Boolean If the zip file has more then one entry, setting this option to true, allows to get the iterator even if the directory is empty. preservePathElements Boolean If the file name contains path elements, setting this option to true, allows the path to be maintained in the zip file. maxDecompressedSize Integer Set the maximum decompressed size of a zip file (in bytes). The default value if not specified corresponds to 1 gigabyte. An IOException will be thrown if the decompressed size exceeds this amount. Set to -1 to disable setting a maximum decompressed size. 136.3. Marshal 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". 136.4. Unmarshal 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(); 136.4.1. Aggregate Note This aggregation strategy requires eager completion check to work properly. In this example we aggregate all text files found in the input directory into a single Zip file that is stored in the output directory. from("file:input/directory?antInclude=*/.txt") .aggregate(constant(true), new ZipAggregationStrategy()) .completionFromBatchConsumer().eagerCheckCompletion() .to("file:output/directory"); The outgoing CamelFileName message header is created using java.io.File.createTempFile, with the ".zip" suffix. If you want to override this behavior, then you can set the value of the CamelFileName header explicitly in your route: from("file:input/directory?antInclude=*/.txt") .aggregate(constant(true), new ZipAggregationStrategy()) .completionFromBatchConsumer().eagerCheckCompletion() .setHeader(Exchange.FILE_NAME, constant("reports.zip")) .to("file:output/directory"); 136.5. Spring Boot Auto-Configuration The component supports 5 options, which are listed below. Name Description Default Type camel.dataformat.zipfile.allow-empty-directory If the zip file has more then one entry, setting this option to true, allows to get the iterator even if the directory is empty. false Boolean camel.dataformat.zipfile.enabled Whether to enable auto configuration of the zipfile data format. This is enabled by default. Boolean camel.dataformat.zipfile.max-decompressed-size Set the maximum decompressed size of a zip file (in bytes). The default value if not specified corresponds to 1 gigabyte. An IOException will be thrown if the decompressed size exceeds this amount. Set to -1 to disable setting a maximum decompressed size. 1073741824 Long camel.dataformat.zipfile.preserve-path-elements If the file name contains path elements, setting this option to true, allows the path to be maintained in the zip file. false Boolean camel.dataformat.zipfile.using-iterator If the zip file has more then one entry, the setting this option to true, allows to work with the splitter EIP, to split the data using an iterator in a streaming mode. false Boolean

Commands:
<dependency> <groupId>org.apache.camel.springboot</groupId> <artifactId>camel-zipfile-starter</artifactId> </dependency>
from("direct:start") .marshal().zipFile() .to("activemq:queue:MY_QUEUE");
from("file:input/directory?antInclude=*/.txt") .marshal().zipFile() .to("file:output/directory");
from("direct:start") .setHeader(Exchange.FILE_NAME, constant("report.txt")) .marshal().zipFile() .to("file:output/directory");
from("activemq:queue:MY_QUEUE") .unmarshal().zipFile() .process(new UnZippedMessageProcessor());
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();
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");