private static FenceMethodWithArg createFenceMethod(
Configuration conf, String clazzName, String arg) throws BadFencingConfigurationException {
Class<?> clazz;
try {
// See if it's a short name for one of the built-in methods
clazz = STANDARD_METHODS.get(clazzName);
if (clazz == null) {
// Try to instantiate the user's custom method
clazz = Class.forName(clazzName);
}
} catch (Exception e) {
throw new BadFencingConfigurationException(
"Could not find configured fencing method " + clazzName, e);
}
// Check that it implements the right interface
if (!FenceMethod.class.isAssignableFrom(clazz)) {
throw new BadFencingConfigurationException(
"Class " + clazzName + " does not implement FenceMethod");
}
FenceMethod method = (FenceMethod) ReflectionUtils.newInstance(clazz, conf);
method.checkArgs(arg);
return new FenceMethodWithArg(method, arg);
}
@Override
public String toString() {
return method.getClass().getCanonicalName() + "(" + arg + ")";
}
