feat: add DistributedEnforcer auto-configuration via useDistributedEnforcer (#102)

Author: jay-babu

README.md

@@ -52,6 +52,9 @@ casbin:
   enableCasbin: true
   #Whether to use thread-synchronized Enforcer, default false
   useSyncedEnforcer: false
+  #Whether to use distributed Enforcer, default false.
+  #If both useSyncedEnforcer and useDistributedEnforcer are set to true, useDistributedEnforcer will take effect.
+  useDistributedEnforcer: false
   #Whether to enable automatic policy saving, if the adapter supports this function, it is enabled by default.
   autoSave: true
   #Storage type [file, jdbc], currently supported jdbc database [mysql (mariadb), h2, oracle, postgresql, db2]

src/main/java/org/casbin/spring/boot/autoconfigure/CasbinAutoConfiguration.java

@@ -4,6 +4,7 @@
 import org.casbin.annotation.CasbinDataSource;
 import org.casbin.exception.CasbinAdapterException;
 import org.casbin.exception.CasbinModelConfigNotFoundException;
+import org.casbin.jcasbin.main.DistributedEnforcer;
 import org.casbin.jcasbin.main.Enforcer;
 import org.casbin.jcasbin.main.SyncedEnforcer;
 import org.casbin.jcasbin.model.Model;
@@ -147,7 +148,10 @@ public Enforcer enforcer(CasbinProperties properties, Adapter adapter) {
             model.addDef("m", "m", "g(r.sub, p.sub) && r.obj == p.obj && r.act == p.act");
         }
         Enforcer enforcer;
-        if (properties.isUseSyncedEnforcer()) {
+        if (properties.isUseDistributedEnforcer()) {
+            enforcer = new DistributedEnforcer(model, adapter);
+            logger.info("Casbin use DistributedEnforcer");
+        } else if (properties.isUseSyncedEnforcer()) {
             enforcer = new SyncedEnforcer(model, adapter);
             logger.info("Casbin use SyncedEnforcer");
         } else {

src/main/java/org/casbin/spring/boot/autoconfigure/properties/CasbinProperties.java

@@ -29,6 +29,10 @@ public class CasbinProperties {
      * Whether to use a synchronized Enforcer
      */
     private boolean useSyncedEnforcer = false;
+    /**
+     * Whether to use a distributed Enforcer
+     */
+    private boolean useDistributedEnforcer = false;
     /**
      * Local model file
      */
@@ -111,6 +115,14 @@ public void setUseSyncedEnforcer(boolean useSyncedEnforcer) {
         this.useSyncedEnforcer = useSyncedEnforcer;
     }
 
+    public boolean isUseDistributedEnforcer() {
+        return useDistributedEnforcer;
+    }
+
+    public void setUseDistributedEnforcer(boolean useDistributedEnforcer) {
+        this.useDistributedEnforcer = useDistributedEnforcer;
+    }
+
     public String getModel() {
         return model;
     }