add interceptor to fix dup authentication_id issue

src/main/java/org/opensrp/web/config/security/WebConfig.java

@@ -11,6 +11,7 @@
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.ComponentScan;
 import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.EnableAspectJAutoProxy;
 import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
 import org.springframework.scheduling.annotation.EnableAsync;
 import org.springframework.web.servlet.config.annotation.EnableWebMvc;
@@ -28,6 +29,7 @@
 @EnableWebMvc
 @ComponentScan
 @EnableAsync
+@EnableAspectJAutoProxy
 public class WebConfig {
 
 	@Bean

src/main/java/org/opensrp/web/security/TokenEndpointRetryInterceptor.java

@@ -0,0 +1,32 @@
+package org.opensrp.web.security;
+
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+import org.aspectj.lang.ProceedingJoinPoint;
+import org.aspectj.lang.annotation.Around;
+import org.aspectj.lang.annotation.Aspect;
+import org.springframework.dao.DuplicateKeyException;
+import org.springframework.stereotype.Component;
+
+@Aspect
+@Component
+public class TokenEndpointRetryInterceptor {
+    private static final int MAX_RETRIES = 4;
+
+    @Around("execution(* org.springframework.security.oauth2.provider.endpoint.TokenEndpoint.*(..))")
+    public Object execute (ProceedingJoinPoint aJoinPoint) throws Throwable {
+        Logger logger = LogManager.getLogger(TokenEndpointRetryInterceptor.class.toString());
+        int tts = 1000;
+        for (int i=0; i<MAX_RETRIES; i++) {
+            try {
+                logger.info("got intercepted in by TokenEndpointEntrypointInterceptor");
+                return aJoinPoint.proceed();
+            } catch (DuplicateKeyException e) {
+                Thread.sleep(tts);
+                tts=tts*2;
+            }
+        }
+        throw new IllegalStateException("Could not execute: " + aJoinPoint.getSignature().getName());
+    }
+
+}