Add new Match application to XACML

Add new generic match application to XACML PDP. This app
will allow ONAP users to design their own matchable policy
types and use StdMatchableTranslator out-of-the box without
any modification. Fills the gap left behind since "configure"
via the Monitoring can support StdCombinedResultsTranslator,
but the Optimization policy types have a specific "closest
match" algorithm tied to them. Gives flexibility.

removed unused import

Issue-ID: POLICY-2596
Change-Id: I0aebae706fb9634e7bb13d78eff0ccc1ae4d752f
Signed-off-by: Pamela Dragosh <pdragosh@research.att.com>

5 files changed, 331 insertions, 0 deletions

diff --git a/applications/match/src/test/java/org/onap/policy/xacml/pdp/application/match/MatchPdpApplicationTest.java b/applications/match/src/test/java/org/onap/policy/xacml/pdp/application/match/MatchPdpApplicationTest.java
new file mode 100644
index 00000000..23b3d6ea
--- /dev/null
+++ b/applications/match/src/test/java/org/onap/policy/xacml/pdp/application/match/MatchPdpApplicationTest.java
@@ -0,0 +1,255 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP
+ * ================================================================================
+ * Copyright (C) 2020 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.match;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
+
+import com.att.research.xacml.api.Response;
+import java.io.File;
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Paths;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.Properties;
+import java.util.ServiceLoader;
+import org.apache.commons.lang3.tuple.Pair;
+import org.junit.BeforeClass;
+import org.junit.ClassRule;
+import org.junit.FixMethodOrder;
+import org.junit.Test;
+import org.junit.rules.TemporaryFolder;
+import org.junit.runners.MethodSorters;
+import org.onap.policy.common.endpoints.parameters.RestServerParameters;
+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.common.utils.resources.TextFileUtils;
+import org.onap.policy.models.decisions.concepts.DecisionRequest;
+import org.onap.policy.models.decisions.concepts.DecisionResponse;
+import org.onap.policy.models.tosca.authorative.concepts.ToscaPolicyTypeIdentifier;
+import org.onap.policy.pdp.xacml.application.common.XacmlApplicationException;
+import org.onap.policy.pdp.xacml.application.common.XacmlApplicationServiceProvider;
+import org.onap.policy.pdp.xacml.application.common.XacmlPolicyUtils;
+import org.onap.policy.pdp.xacml.xacmltest.TestUtils;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+@FixMethodOrder(MethodSorters.NAME_ASCENDING)
+public class MatchPdpApplicationTest {
+    private static final Logger LOGGER = LoggerFactory.getLogger(MatchPdpApplicationTest.class);
+    private static Properties properties = new Properties();
+    private static File propertiesFile;
+    private static XacmlApplicationServiceProvider service;
+    private static StandardCoder gson = new StandardCoder();
+    private static DecisionRequest baseRequest;
+    private static RestServerParameters clientParams;
+
+    @ClassRule
+    public static final TemporaryFolder policyFolder = new TemporaryFolder();
+
+    /**
+     * Copies the xacml.properties and policies files into
+     * temporary folder and loads the service provider saving
+     * instance of provider off for other tests to use.
+     */
+    @BeforeClass
+    public static void setUp() throws Exception {
+        clientParams = mock(RestServerParameters.class);
+        when(clientParams.getHost()).thenReturn("localhost");
+        when(clientParams.getPort()).thenReturn(6969);
+        //
+        // Load Single Decision Request
+        //
+        baseRequest = gson.decode(
+                TextFileUtils
+                    .getTextFileAsString(
+                            "src/test/resources/decision.match.input.json"),
+                    DecisionRequest.class);
+        //
+        // Setup our temporary folder
+        //
+        XacmlPolicyUtils.FileCreator myCreator = (String filename) -> policyFolder.newFile(filename);
+        propertiesFile = XacmlPolicyUtils.copyXacmlPropertiesContents("src/test/resources/xacml.properties",
+                properties, myCreator);
+        //
+        // Copy the test policy types into data area
+        //
+        String policy = "onap.policies.match.Test";
+        String policyType = ResourceUtils.getResourceAsString("src/test/resources/" + policy + ".yaml");
+        LOGGER.info("Copying {}", policyType);
+        Files.write(Paths.get(policyFolder.getRoot().getAbsolutePath(), policy + "-1.0.0.yaml"),
+                policyType.getBytes());
+        //
+        // Load service
+        //
+        ServiceLoader<XacmlApplicationServiceProvider> applicationLoader =
+                ServiceLoader.load(XacmlApplicationServiceProvider.class);
+        //
+        // Iterate through Xacml application services and find
+        // the optimization service. Save it for use throughout
+        // all the Junit tests.
+        //
+        StringBuilder strDump = new StringBuilder("Loaded applications:" + XacmlPolicyUtils.LINE_SEPARATOR);
+        for (XacmlApplicationServiceProvider application : applicationLoader) {
+            //
+            // Is it our service?
+            //
+            if (application instanceof MatchPdpApplication) {
+                //
+                // Should be the first and only one
+                //
+                assertThat(service).isNull();
+                service = application;
+            }
+            strDump.append(application.applicationName());
+            strDump.append(" supports ");
+            strDump.append(application.supportedPolicyTypes());
+            strDump.append(XacmlPolicyUtils.LINE_SEPARATOR);
+        }
+        LOGGER.debug("{}", strDump);
+        assertThat(service).isNotNull();
+        //
+        // Tell it to initialize based on the properties file
+        // we just built for it.
+        //
+        service.initialize(propertiesFile.toPath().getParent(), clientParams);
+    }
+
+    @Test
+    public void test01Basics() {
+        //
+        // Make sure there's an application name
+        //
+        assertThat(service.applicationName()).isNotEmpty();
+        //
+        // Decisions
+        //
+        assertThat(service.actionDecisionsSupported().size()).isEqualTo(1);
+        assertThat(service.actionDecisionsSupported()).contains("match");
+        //
+        // Ensure it has the supported policy types and
+        // can support the correct policy types.
+        //
+        assertThat(service.canSupportPolicyType(new ToscaPolicyTypeIdentifier(
+                "onap.policies.match.Test", "1.0.0"))).isTrue();
+        assertThat(service.canSupportPolicyType(new ToscaPolicyTypeIdentifier(
+                "onap.foobar", "1.0.0"))).isFalse();
+    }
+
+    @Test
+    public void test02NoPolicies() throws CoderException {
+        //
+        // Ask for a decision when there are no policies loaded
+        //
+        LOGGER.info("Request {}", gson.encode(baseRequest));
+        Pair<DecisionResponse, Response> decision = service.makeDecision(baseRequest, null);
+        LOGGER.info("Decision {}", decision.getKey());
+
+        assertThat(decision.getKey()).isNotNull();
+        assertThat(decision.getKey().getPolicies()).isEmpty();
+    }
+
+    @Test
+    public void test03Match() throws CoderException, FileNotFoundException, IOException,
+        XacmlApplicationException {
+        //
+        // Now load all the test match policies
+        //
+        TestUtils.loadPolicies("src/test/resources/test-match-policies.yaml", service);
+        //
+        // Ask for a decision
+        //
+        DecisionResponse response = makeDecision();
+        //
+        // There is no default policy
+        //
+        assertThat(response).isNotNull();
+        assertThat(response.getPolicies()).isEmpty();
+        //
+        // Ask for foo
+        //
+        baseRequest.getResource().put("matchable", "foo");
+        //
+        // Get the decision
+        //
+        response = makeDecision();
+        assertThat(response).isNotNull();
+        assertThat(response.getPolicies()).hasSize(1);
+        //
+        // Validate it
+        //
+        validateDecision(response, baseRequest, "value1");
+        //
+        // Ask for bar
+        //
+        baseRequest.getResource().put("matchable", "bar");
+        //
+        // Get the decision
+        //
+        response = makeDecision();
+        assertThat(response).isNotNull();
+        assertThat(response.getPolicies()).hasSize(1);
+        //
+        // Validate it
+        //
+        validateDecision(response, baseRequest, "value2");
+        //
+        // Ask for hello (should return nothing)
+        //
+        baseRequest.getResource().put("matchable", "hello");
+        //
+        // Get the decision
+        //
+        response = makeDecision();
+        assertThat(response).isNotNull();
+        assertThat(response.getPolicies()).isEmpty();
+    }
+
+    private DecisionResponse makeDecision() {
+        Pair<DecisionResponse, Response> decision = service.makeDecision(baseRequest, null);
+        LOGGER.info("Request Resources {}", baseRequest.getResource());
+        LOGGER.info("Decision {}", decision.getKey());
+        for (Entry<String, Object> entrySet : decision.getKey().getPolicies().entrySet()) {
+            LOGGER.info("Policy {}", entrySet.getKey());
+        }
+        return decision.getKey();
+    }
+
+    @SuppressWarnings("unchecked")
+    private void validateDecision(DecisionResponse decision, DecisionRequest request, String value) {
+        for (Entry<String, Object> entrySet : decision.getPolicies().entrySet()) {
+            LOGGER.info("Decision Returned Policy {}", entrySet.getKey());
+            assertThat(entrySet.getValue()).isInstanceOf(Map.class);
+            Map<String, Object> policyContents = (Map<String, Object>) entrySet.getValue();
+            assertThat(policyContents).containsKey("properties");
+            assertThat(policyContents.get("properties")).isInstanceOf(Map.class);
+            Map<String, Object> policyProperties = (Map<String, Object>) policyContents.get("properties");
+
+            assertThat(policyProperties.get("nonmatchable").toString()).hasToString(value);
+        }
+    }
+}
diff --git a/applications/match/src/test/resources/decision.match.input.json b/applications/match/src/test/resources/decision.match.input.json
new file mode 100644
index 00000000..403d0155
--- /dev/null
+++ b/applications/match/src/test/resources/decision.match.input.json
@@ -0,0 +1,10 @@
+{
+  "ONAPName": "my-ONAP",
+  "ONAPComponent": "my-component",
+  "ONAPInstance": "my-instance",
+  "requestId": "unique-request-1",
+  "action": "match",
+  "resource": {
+      "matchable": ""
+  }
+}
\ No newline at end of file
diff --git a/applications/match/src/test/resources/onap.policies.match.Test.yaml b/applications/match/src/test/resources/onap.policies.match.Test.yaml
new file mode 100644
index 00000000..a131b844
--- /dev/null
+++ b/applications/match/src/test/resources/onap.policies.match.Test.yaml
@@ -0,0 +1,16 @@
+tosca_definitions_version: tosca_simple_yaml_1_1_0
+policy_types:
+   onap.policies.match.Test:
+      derived_from: onap.policies.Match
+      version: 1.0.0
+      name: onap.policies.match.Test
+      description: Test Matching Policy Type to test matchable policies
+      properties:
+         matchable:
+            type: string
+            metadata:
+               matchable: true
+            required: true
+         nonmatchable:
+            type: string
+            required: true
diff --git a/applications/match/src/test/resources/test-match-policies.yaml b/applications/match/src/test/resources/test-match-policies.yaml
new file mode 100644
index 00000000..d0e214ca
--- /dev/null
+++ b/applications/match/src/test/resources/test-match-policies.yaml
@@ -0,0 +1,19 @@
+tosca_definitions_version: tosca_simple_yaml_1_1_0
+topology_template:
+    policies:
+    -   test_match_1:
+            type: onap.policies.match.Test
+            version: 1.0.0
+            type_version: 1.0.0
+            name: test_match_1
+            properties:
+               matchable: foo
+               nonmatchable: value1
+    -   test_match_2:
+            type: onap.policies.match.Test
+            version: 1.0.0
+            type_version: 1.0.0
+            name: test_match_2
+            properties:
+               matchable: bar
+               nonmatchable: value2
\ No newline at end of file
diff --git a/applications/match/src/test/resources/xacml.properties b/applications/match/src/test/resources/xacml.properties
new file mode 100644
index 00000000..5ea247cf
--- /dev/null
+++ b/applications/match/src/test/resources/xacml.properties
@@ -0,0 +1,31 @@
+#
+# Properties that the embedded PDP engine uses to configure and load
+#
+# Standard API Factories
+#
+xacml.dataTypeFactory=com.att.research.xacml.std.StdDataTypeFactory
+xacml.pdpEngineFactory=com.att.research.xacmlatt.pdp.ATTPDPEngineFactory
+xacml.pepEngineFactory=com.att.research.xacml.std.pep.StdEngineFactory
+xacml.pipFinderFactory=com.att.research.xacml.std.pip.StdPIPFinderFactory
+xacml.traceEngineFactory=com.att.research.xacml.std.trace.LoggingTraceEngineFactory
+#
+# AT&T PDP Implementation Factories
+#
+xacml.att.evaluationContextFactory=com.att.research.xacmlatt.pdp.std.StdEvaluationContextFactory
+xacml.att.combiningAlgorithmFactory=com.att.research.xacmlatt.pdp.std.StdCombiningAlgorithmFactory
+xacml.att.functionDefinitionFactory=com.att.research.xacmlatt.pdp.std.StdFunctionDefinitionFactory
+#
+# ONAP PDP Implementation Factories
+#
+xacml.att.policyFinderFactory=org.onap.policy.pdp.xacml.application.common.OnapPolicyFinderFactory
+
+#
+# Use a root combining algorithm
+#
+xacml.att.policyFinderFactory.combineRootPolicies=urn:com:att:xacml:3.0:policy-combining-algorithm:combined-permit-overrides
+
+#
+# Policies to load
+#
+xacml.rootPolicies=
+xacml.referencedPolicies=
\ No newline at end of file