smolnar82 commented on a change in pull request #361:
URL: https://github.com/apache/knox/pull/361#discussion_r454396302
##########
File path:
gateway-server/src/main/java/org/apache/knox/gateway/services/factory/AbstractServiceFactory.java
##########
@@ -47,22 +52,38 @@ public Service create(GatewayServices gatewayServices,
ServiceType serviceType,
@Override
public Service create(GatewayServices gatewayServices, ServiceType
serviceType, GatewayConfig gatewayConfig, Map<String, String> options, String
implementation)
throws ServiceLifecycleException {
- Service service = null;
- if (getServiceType() == serviceType) {
- service = createService(gatewayServices, serviceType, gatewayConfig,
options, implementation);
- if (service == null && StringUtils.isNotBlank(implementation)) {
- // no known service implementation created, try to create the custom
one
- try {
- service =
Service.class.cast(Class.forName(implementation).newInstance());
- logServiceUsage(implementation, serviceType);
- } catch (InstantiationException | IllegalAccessException |
ClassNotFoundException e) {
- throw new ServiceLifecycleException("Errror while instantiating " +
serviceType.getShortName() + " service implementation " + implementation, e);
+ Service service = fetchFromCache(serviceType, implementation);
+ if (service == null) {
+ if (getServiceType() == serviceType) {
+ service = createService(gatewayServices, serviceType, gatewayConfig,
options, implementation);
+ if (service == null && StringUtils.isNotBlank(implementation)) {
Review comment:
We **do** have a fallback. There are 2 types of service factories:
1. there is only one known implementation - in this case, that known
implementation will be created if it's not overwritten in `gatewy-site.xml`
2. there are more than one known implementations - in this case, one of the
known implementations (typically the first one in the `if-else` branches) will
be the default one (i.e. none is defined in `gateway-site.xml`)
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