update: add cmabEndpoint handling in DefaultCmabClient and CmabClientConfig

Author: FarhanAnjum-opti

core-api/src/main/java/com/optimizely/ab/cmab/client/CmabClientConfig.java

@@ -23,6 +23,7 @@
  */
 public class CmabClientConfig {
     private final RetryConfig retryConfig;
+    private String cmabEndpoint = null;
 
     public CmabClientConfig(@Nullable RetryConfig retryConfig) {
         this.retryConfig = retryConfig;
@@ -33,6 +34,15 @@ public RetryConfig getRetryConfig() {
         return retryConfig;
     }
 
+    @Nullable
+    public String getCmabEndpoint() {
+        return cmabEndpoint;
+    }
+
+    public void setCmabEndpoint(@Nullable String cmabEndpoint){
+        this.cmabEndpoint = cmabEndpoint;
+    }
+
     /**
      * Creates a config with default retry settings.
      * 

core-httpclient-impl/src/main/java/com/optimizely/ab/cmab/DefaultCmabClient.java

@@ -18,8 +18,6 @@
 import java.io.IOException;
 import java.io.UnsupportedEncodingException;
 import java.util.Map;
-import java.util.regex.Matcher;
-import java.util.regex.Pattern;
 
 import org.apache.http.ParseException;
 import org.apache.http.StatusLine;
@@ -33,10 +31,10 @@
 import com.optimizely.ab.OptimizelyHttpClient;
 import com.optimizely.ab.cmab.client.CmabClient;
 import com.optimizely.ab.cmab.client.CmabClientConfig;
+import com.optimizely.ab.cmab.client.CmabClientHelper;
 import com.optimizely.ab.cmab.client.CmabFetchException;
 import com.optimizely.ab.cmab.client.CmabInvalidResponseException;
 import com.optimizely.ab.cmab.client.RetryConfig;
-import com.optimizely.ab.cmab.client.CmabClientHelper;
 
 public class DefaultCmabClient implements CmabClient {
 
@@ -45,11 +43,15 @@ public class DefaultCmabClient implements CmabClient {
 
     private final OptimizelyHttpClient httpClient;
     private final RetryConfig retryConfig;
+    private final String cmabEndpoint;
 
     // Primary constructor - all others delegate to this
     public DefaultCmabClient(OptimizelyHttpClient httpClient, CmabClientConfig config) {
         this.retryConfig = config != null ? config.getRetryConfig() : null;
         this.httpClient = httpClient != null ? httpClient : createDefaultHttpClient();
+        this.cmabEndpoint = (config != null && config.getCmabEndpoint() != null)
+            ? config.getCmabEndpoint()
+            : CmabClientHelper.CMAB_PREDICTION_ENDPOINT;
     }
 
     // Constructor with HTTP client only (no retry)
@@ -76,7 +78,7 @@ private OptimizelyHttpClient createDefaultHttpClient() {
     @Override
     public String fetchDecision(String ruleId, String userId, Map<String, Object> attributes, String cmabUuid) {
         // Implementation will use this.httpClient and this.retryConfig
-        String url = String.format(CmabClientHelper.CMAB_PREDICTION_ENDPOINT, ruleId);
+        String url = String.format(cmabEndpoint, ruleId);
         String requestBody = CmabClientHelper.buildRequestJson(userId, ruleId, attributes, cmabUuid);
 
         // Use retry logic if configured, otherwise single request