Add "configure" operation to xacml

[policy/models.git] / models-interactions / model-simulators / src / main / java / org / onap / policy / simulators / XacmlSimulatorJaxRs.java

diff --git a/models-interactions/model-simulators/src/main/java/org/onap/policy/simulators/XacmlSimulatorJaxRs.java b/models-interactions/model-simulators/src/main/java/org/onap/policy/simulators/XacmlSimulatorJaxRs.java
index f25b65c..54023f6 100644 (file)
--- a/models-interactions/model-simulators/src/main/java/org/onap/policy/simulators/XacmlSimulatorJaxRs.java
+++ b/models-interactions/model-simulators/src/main/java/org/onap/policy/simulators/XacmlSimulatorJaxRs.java
@@ -22,21 +22,41 @@
 package org.onap.policy.simulators;
 
 import java.util.Collections;
+import java.util.HashMap;
 import java.util.Map;
+import java.util.function.Function;
 import javax.ws.rs.Consumes;
 import javax.ws.rs.POST;
 import javax.ws.rs.Path;
 import javax.ws.rs.Produces;
 import javax.ws.rs.core.MediaType;
+import org.onap.policy.common.utils.coder.Coder;
+import org.onap.policy.common.utils.coder.CoderException;
+import org.onap.policy.common.utils.coder.StandardCoder;
+import org.onap.policy.common.utils.resources.ResourceUtils;
 import org.onap.policy.models.decisions.concepts.DecisionRequest;
 import org.onap.policy.models.decisions.concepts.DecisionResponse;
+import org.onap.policy.models.tosca.authorative.concepts.ToscaServiceTemplate;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 @Path("/policy/pdpx/v1")
 public class XacmlSimulatorJaxRs {
+    private static final Logger logger = LoggerFactory.getLogger(XacmlSimulatorJaxRs.class);
+
+    public static final String POLICY_CONFIG_OPER_PREFIX = "org/onap/policy/simulators/xacml/xacml.configure.";
     public static final String DENY_CLNAME = "denyGuard";
+    public static final Coder coder = new StandardCoder();
+
+    // @formatter:off
+    private Map<String, Function<DecisionRequest, DecisionResponse>> action2method = Map.of(
+                "guard", this::guardDecision,
+                "configure", this::configureDecision
+                );
+    // @formatter:on
 
     /**
-     * Get a guard decision.
+     * Get a XACML decision.
      *
      * @param req the request
      * @return the response
@@ -45,23 +65,55 @@ public class XacmlSimulatorJaxRs {
     @Path("/decision")
     @Consumes(MediaType.APPLICATION_JSON)
     @Produces("application/json")
-    public DecisionResponse getGuardDecision(DecisionRequest req) {
+    public DecisionResponse getDecision(DecisionRequest req) {
+        Function<DecisionRequest, DecisionResponse> func = action2method.get(req.getAction());
+        if (func != null) {
+            return func.apply(req);
+        }
+
+        DecisionResponse response = new DecisionResponse();
+        response.setMessage("unsupported action: " + req.getAction());
+        return response;
+    }
+
+    private DecisionResponse guardDecision(DecisionRequest req) {
         @SuppressWarnings("unchecked")
         Map<String, String> guard = (Map<String, String>) req.getResource().get("guard");
         String clName = guard.get("clname");
+
         var response = new DecisionResponse();
-        if (DENY_CLNAME.equals(clName)) {
-            response.setStatus("Deny");
-            response.setAdvice(Collections.emptyMap());
-            response.setObligations(Collections.emptyMap());
-            response.setPolicies(Collections.emptyMap());
-            return response;
+        response.setStatus(DENY_CLNAME.equals(clName) ? "Deny" : "Permit");
+        response.setAdvice(Collections.emptyMap());
+        response.setObligations(Collections.emptyMap());
+        response.setPolicies(Collections.emptyMap());
+        return response;
+    }
+
+    private DecisionResponse configureDecision(DecisionRequest req) {
+        var response = new DecisionResponse();
+        response.setPolicies(new HashMap<>());
+
+        Map<String, Object> resources = req.getResource();
+        var policyId = resources.get("policy-id");
+        if (policyId != null) {
+            String fileName = POLICY_CONFIG_OPER_PREFIX + policyId + ".json";
+            try {
+                var policyJson = ResourceUtils.getResourceAsString(fileName);
+                var toscaServiceTemplate = coder.decode(policyJson, ToscaServiceTemplate.class);
+                toscaServiceTemplate.getToscaTopologyTemplate().getPolicies()
+                                .forEach(policyMap -> response.getPolicies().putAll(policyMap));
+            } catch (CoderException e) {
+                logger.warn("cannot decode policy file: {}", fileName, e);
+                response.setMessage("cannot decode policy");
+            } catch (NullPointerException e) {
+                logger.warn("cannot read policy simulator file", e);
+                response.setMessage("cannot read policy simulator file");
+            }
         } else {
-            response.setStatus("Permit");
-            response.setAdvice(Collections.emptyMap());
-            response.setObligations(Collections.emptyMap());
-            response.setPolicies(Collections.emptyMap());
-            return response;
+            // the current simulator only supports searching by policy-id
+            // future changes may support getting policies by policy-type
+            response.setMessage("resource must contain policy-id key");
         }
+        return response;
     }
 }