Adding optimization application finish guard

Created Optimization application and created a translator
for it. The translator makes an assumption that OOF wants
to query on policyScope and policyType properties.

Rearranged some of the test code for re-usability.

Guard policies are now creating for frequency limiter
and min max. Probably could use some clean up.

Upgraded to xacml 2.0.1 to include a fix for handling
null attribute values.

Added some code to test missing values.

Issue-ID: POLICY-1273
Change-Id: Ia3dbfa992bbe0cbb5aa294c38aa2aff430a3230a
Signed-off-by: Pamela Dragosh <pdragosh@research.att.com>

2 files changed, 165 insertions, 0 deletions

diff --git a/applications/optimization/src/main/java/org/onap/policy/xacml/pdp/application/optimization/OptimizationPdpApplication.java b/applications/optimization/src/main/java/org/onap/policy/xacml/pdp/application/optimization/OptimizationPdpApplication.java
new file mode 100644
index 00000000..4a4a6046
--- /dev/null
+++ b/applications/optimization/src/main/java/org/onap/policy/xacml/pdp/application/optimization/OptimizationPdpApplication.java
@@ -0,0 +1,164 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP
+ * ================================================================================
+ * Copyright (C) 2019 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.xacml.pdp.application.optimization;
+
+import com.att.research.xacml.api.Request;
+import com.att.research.xacml.api.Response;
+import com.att.research.xacml.util.XACMLPolicyWriter;
+import com.google.common.collect.Lists;
+
+import java.io.IOException;
+import java.nio.file.Path;
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Properties;
+
+import oasis.names.tc.xacml._3_0.core.schema.wd_17.PolicyType;
+
+import org.onap.policy.models.decisions.concepts.DecisionRequest;
+import org.onap.policy.models.decisions.concepts.DecisionResponse;
+import org.onap.policy.pdp.xacml.application.common.ToscaPolicyConversionException;
+import org.onap.policy.pdp.xacml.application.common.XacmlPolicyUtils;
+import org.onap.policy.pdp.xacml.application.common.std.StdMatchableTranslator;
+import org.onap.policy.pdp.xacml.application.common.std.StdXacmlApplicationServiceProvider;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class OptimizationPdpApplication extends StdXacmlApplicationServiceProvider {
+
+    private static final Logger LOGGER = LoggerFactory.getLogger(OptimizationPdpApplication.class);
+    private static final String STRING_VERSION100 = "1.0.0";
+
+    private StdMatchableTranslator translator = new StdMatchableTranslator();
+    private Map<String, String> supportedPolicyTypes = new HashMap<>();
+
+    /**
+     * Constructor.
+     */
+    public OptimizationPdpApplication() {
+        this.supportedPolicyTypes.put("onap.policies.optimization.AffinityPolicy", STRING_VERSION100);
+        this.supportedPolicyTypes.put("onap.policies.optimization.DistancePolicy", STRING_VERSION100);
+        this.supportedPolicyTypes.put("onap.policies.optimization.HpaPolicy", STRING_VERSION100);
+        this.supportedPolicyTypes.put("onap.policies.optimization.OptimizationPolicy", STRING_VERSION100);
+        this.supportedPolicyTypes.put("onap.policies.optimization.PciPolicy", STRING_VERSION100);
+        this.supportedPolicyTypes.put("onap.policies.optimization.QueryPolicy", STRING_VERSION100);
+        this.supportedPolicyTypes.put("onap.policies.optimization.SubscriberPolicy", STRING_VERSION100);
+        this.supportedPolicyTypes.put("onap.policies.optimization.Vim_fit", STRING_VERSION100);
+        this.supportedPolicyTypes.put("onap.policies.optimization.VnfPolicy", STRING_VERSION100);
+    }
+
+    @Override
+    public String applicationName() {
+        return "Optimization Application";
+    }
+
+    @Override
+    public List<String> actionDecisionsSupported() {
+        return Arrays.asList("optimize");
+    }
+
+    @Override
+    public synchronized List<String> supportedPolicyTypes() {
+        return Lists.newArrayList(supportedPolicyTypes.keySet());
+    }
+
+    @Override
+    public boolean canSupportPolicyType(String policyType, String policyTypeVersion) {
+        //
+        // For the time being, restrict this if the version isn't known.
+        // Could be too difficult to support changing of versions dynamically.
+        //
+        if (! this.supportedPolicyTypes.containsKey(policyType)) {
+            return false;
+        }
+        //
+        // Must match version exactly
+        //
+        return this.supportedPolicyTypes.get(policyType).equals(policyTypeVersion);
+    }
+
+    @Override
+    public synchronized void loadPolicies(Map<String, Object> toscaPolicies) {
+        try {
+            //
+            // Convert the policies first
+            //
+            List<PolicyType> listPolicies = translator.scanAndConvertPolicies(toscaPolicies);
+            if (listPolicies.isEmpty()) {
+                throw new ToscaPolicyConversionException("Converted 0 policies");
+            }
+            //
+            // Create a copy of the properties object
+            //
+            Properties newProperties = this.getProperties();
+            //
+            // Iterate through the policies
+            //
+            for (PolicyType newPolicy : listPolicies) {
+                //
+                // Construct the filename
+                //
+                Path refPath = XacmlPolicyUtils.constructUniquePolicyFilename(newPolicy, this.getDataPath());
+                //
+                // Write the policy to disk
+                // Maybe check for an error
+                //
+                XACMLPolicyWriter.writePolicyFile(refPath, newPolicy);
+                //
+                // Add root policy to properties object
+                //
+                XacmlPolicyUtils.addRootPolicy(newProperties, refPath);
+            }
+            //
+            // Write the properties to disk
+            //
+            XacmlPolicyUtils.storeXacmlProperties(newProperties,
+                    XacmlPolicyUtils.getPropertiesPath(this.getDataPath()));
+            //
+            // Reload the engine
+            //
+            this.createEngine(newProperties);
+        } catch (IOException | ToscaPolicyConversionException e) {
+            LOGGER.error("Failed to loadPolicies {}", e);
+        }
+    }
+
+    @Override
+    public synchronized DecisionResponse makeDecision(DecisionRequest request) {
+        //
+        // Convert to a XacmlRequest
+        //
+        Request xacmlRequest = translator.convertRequest(request);
+        //
+        // Now get a decision
+        //
+        Response xacmlResponse = this.xacmlDecision(xacmlRequest);
+        //
+        // Convert to a DecisionResponse
+        //
+        return translator.convertResponse(xacmlResponse);
+    }
+
+}
diff --git a/applications/optimization/src/main/resources/META-INF/services/org.onap.policy.pdp.xacml.application.common.XacmlApplicationServiceProvider b/applications/optimization/src/main/resources/META-INF/services/org.onap.policy.pdp.xacml.application.common.XacmlApplicationServiceProvider
new file mode 100644
index 00000000..ffb7e802
--- /dev/null
+++ b/applications/optimization/src/main/resources/META-INF/services/org.onap.policy.pdp.xacml.application.common.XacmlApplicationServiceProvider
@@ -0,0 +1 @@
+org.onap.policy.xacml.pdp.application.optimization.OptimizationPdpApplication
\ No newline at end of file