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Google App Engine

Apache Wink can be is run using Google App Engine as the core functionality is fully compatible. However, due to some of the App Engine limitations, a number of the additional functionalities functions may not work correctly.

Known Limitations

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Logging

Google uses java.util.logging, also referred to as the JDK 1.4 logging. Apache Wink uses slf4j. In order to enable Wink's logging function, replace the slf4j-simple-<version>.jar with the slf4j-jdk14-<version>.jar.

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No Format
org.apache.wink.level=ALL

Everything that the servlet writes to the standard output stream (System.out) and standard error stream (System.err) is captured by the App Engine and then recorded in the application logs.

Info
titleUseful Tip

In order to gain an in depth understanding refer to Logging.

Tip

When running with Spring, make sure that you have jcl-over-slf4j-<version>.jar in the classpath. This jar is needed, since Spring uses commons-logging.

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The following section contains "additional Issues" that maybe experience while trying to run custom developer code in the Google App Engine. It is advantageous to read the relevant documentation as it provides important information, that will save valuable developer time that is required to ascertain why the application behaves differently in comparison to a regular servlet container.

Context Path

Usually the uri URI in a servlet container looks like this:

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