static {
// Ensure that $undefinedvar will produce an exception rather than outputting $undefinedvar.
velocityRuntimeInstance.setProperty(RuntimeConstants.RUNTIME_REFERENCES_STRICT, "true");
velocityRuntimeInstance.setProperty(
RuntimeConstants.RUNTIME_LOG_LOGSYSTEM_CLASS, new NullLogChute());
velocityRuntimeInstance.setProperty(
RuntimeConstants.RESOURCE_MANAGER_CACHE_CLASS, ResourceCacheImpl.class.getName());
// Setting ResourceCacheImpl is should not be necessary since that is the default value, but
// ensures that Maven shading sees that Apache Commons classes referenced from ResourceCacheImpl
// are indeed referenced and cannot be removed during minimization.
// Disable any logging that Velocity might otherwise see fit to do.
velocityRuntimeInstance.setProperty(RuntimeConstants.RUNTIME_LOG_LOGSYSTEM, new NullLogChute());
// Velocity likes its "managers", LogManager and ResourceManager, which it loads through the
// context class loader. If that loader can see another copy of Velocity then that will lead
// to hard-to-diagnose exceptions during initialization.
Thread currentThread = Thread.currentThread();
ClassLoader oldContextLoader = currentThread.getContextClassLoader();
try {
currentThread.setContextClassLoader(TemplateVars.class.getClassLoader());
velocityRuntimeInstance.init();
} finally {
currentThread.setContextClassLoader(oldContextLoader);
}
}
