private RotationPolicy getRotationPolicy(LogRotationPolicyCfg config) throws ConfigException {
String className = config.getJavaClass();
LogRotationPolicyCfgDefn d = LogRotationPolicyCfgDefn.getInstance();
ClassPropertyDefinition pd = d.getJavaClassPropertyDefinition();
// Load the class and cast it to a RotationPolicy.
Class<? extends RotationPolicy> theClass;
RotationPolicy rotationPolicy;
try {
theClass = pd.loadClass(className, RotationPolicy.class);
rotationPolicy = theClass.newInstance();
// Determine the initialization method to use: it must take a
// single parameter which is the exact type of the configuration
// object.
Method method =
theClass.getMethod("initializeLogRotationPolicy", config.configurationClass());
method.invoke(rotationPolicy, config);
} catch (InvocationTargetException ite) {
// Rethrow the exceptions thrown be the invoked method.
Throwable e = ite.getTargetException();
Message message =
ERR_CONFIG_ROTATION_POLICY_INVALID_CLASS.get(
className, config.dn().toString(), stackTraceToSingleLineString(e));
throw new ConfigException(message, e);
} catch (Exception e) {
Message message =
ERR_CONFIG_ROTATION_POLICY_INVALID_CLASS.get(
className, config.dn().toString(), String.valueOf(e));
throw new ConfigException(message, e);
}
// The connection handler has been successfully initialized.
return rotationPolicy;
}
private boolean isJavaClassAcceptable(
LogRotationPolicyCfg config, List<Message> unacceptableReasons) {
String className = config.getJavaClass();
LogRotationPolicyCfgDefn d = LogRotationPolicyCfgDefn.getInstance();
ClassPropertyDefinition pd = d.getJavaClassPropertyDefinition();
// Load the class and cast it to a RotationPolicy.
Class<? extends RotationPolicy> theClass;
try {
theClass = pd.loadClass(className, RotationPolicy.class);
theClass.newInstance();
} catch (Exception e) {
Message message =
ERR_CONFIG_ROTATION_POLICY_INVALID_CLASS.get(
className, config.dn().toString(), String.valueOf(e));
unacceptableReasons.add(message);
return false;
}
// Check that the implementation class implements the correct interface.
try {
// Determine the initialization method to use: it must take a
// single parameter which is the exact type of the configuration
// object.
theClass.getMethod("initializeLogRotationPolicy", config.configurationClass());
} catch (Exception e) {
Message message =
ERR_CONFIG_ROTATION_POLICY_INVALID_CLASS.get(
className, config.dn().toString(), String.valueOf(e));
unacceptableReasons.add(message);
return false;
}
// The class is valid as far as we can tell.
return true;
}