tree: b10dfee2f3bfcb5396cea30102492c4cd7de7e59 [path history] [tgz]
  1. README.md
  2. pom.xml
  3. src/
examples/camel-example-bigxml-split/README.md

Splitting big XML payloads

Introduction

This example shows how to deal with big XML files in Camel.

The XPath tokenizer will load the entire XML content into memory, so it's not well suited for very big XML payloads.
Instead you can use the StAX or XML tokenizers to efficiently iterate the XML payload in a streamed fashion.
For more information please read the official documentation.

There are 2 tests:

  1. StaxTokenizerTest : requires using JAXB and process messages using a SAX ContentHandler
  2. XmlTokenizerTest : easier to use but can't handle complex XML structures (i.e. nested naming clash)

The test XML contains a simple collection of records.

<?xml version="1.0" encoding="UTF-8"?>
<records xmlns="http://fvaleri.it/records">
    <record>
        <key>0</key>
        <value>The quick brown fox jumps over the lazy dog</value>
    </record>
</records>

You can customize numOfRecords and maxWaitTime to do performance tests with different payloads.
Max JVM heap is restricted to 20 MB to show that it works with a very limited amount of memory (see pom.xml).

There are also a number of optional runtime settings:

  • no cache enabled
  • no parallel processing
  • no mock endpoints with in-memory exchange store
  • enabled Throughput Logging for DEBUG level
  • disabled JMX instrumentation

Build and run

The test XML file is built once beforehand using @BeforeClass.

mvn clean test -DskipTests=false

Test results

Tested on MacBook Pro 2,8 GHz Intel Core i7; 16 GB 2133 MHz LPDDR3; Java 1.8.0_181.

tokenizernumOfRecordsmaxWaitTime (ms)XML size (kB)time (ms)
StAX40000500035433052
XML40000500035432756
StAX1000000200008973511740
XML1000000200008973511137
StAX150000002000001366102132176
XML150000002000001366102132549

Forum, Help, etc

If you hit an problems please let us know on the Camel Forums http://camel.apache.org/discussion-forums.html

Please help us make Apache Camel better - we appreciate any feedback you may have. Enjoy!

The Camel riders!