Adding policy forwarder for apex-pdp

* Adding policy forwarder for apex-pdp
* Adding ApexPdpPolicy to hold policies related to apex-pdp
* Adding forwarder parameter for configuring apex-pdp forwarder
* Adding test cases for all code changes.

Change-Id: Ic1cb9bfc11b2b95321ea2d81882c588b025d33fb
Issue-ID: POLICY-1101
Signed-off-by: ramverma <ram.krishna.verma@ericsson.com>

2 files changed, 271 insertions, 0 deletions

diff --git a/plugins/forwarding-plugins/src/test/java/org/onap/policy/distribution/forwarding/apex/pdp/ApexPdpPolicyForwarderParameterGroupTest.java b/plugins/forwarding-plugins/src/test/java/org/onap/policy/distribution/forwarding/apex/pdp/ApexPdpPolicyForwarderParameterGroupTest.java
new file mode 100644
index 00000000..ca0efb5c
--- /dev/null
+++ b/plugins/forwarding-plugins/src/test/java/org/onap/policy/distribution/forwarding/apex/pdp/ApexPdpPolicyForwarderParameterGroupTest.java
@@ -0,0 +1,69 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2018 Ericsson. 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.distribution.forwarding.apex.pdp;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+
+import org.junit.Test;
+import org.onap.policy.common.parameters.ValidationStatus;
+
+public class ApexPdpPolicyForwarderParameterGroupTest {
+
+    @Test
+    public void testBuilderAndGetters() {
+        final ApexPdpPolicyForwarderParameterBuilder builder = new ApexPdpPolicyForwarderParameterBuilder();
+        builder.setHostname("10.10.10.10").setPort(1234).setIgnoreConflicts(false).setForceUpdate(true);
+        final ApexPdpPolicyForwarderParameterGroup configurationParameters =
+                new ApexPdpPolicyForwarderParameterGroup(builder);
+        configurationParameters.setName("myConfiguration");
+
+        assertEquals("myConfiguration", configurationParameters.getName());
+        assertTrue(configurationParameters.isForceUpdate());
+        assertEquals("10.10.10.10", configurationParameters.getHostname());
+        assertEquals(1234, configurationParameters.getPort());
+        assertFalse(configurationParameters.isIgnoreConflicts());
+        assertEquals(ValidationStatus.CLEAN, configurationParameters.validate().getStatus());
+    }
+
+    @Test
+    public void testInvalidHostName() {
+        final ApexPdpPolicyForwarderParameterBuilder builder = new ApexPdpPolicyForwarderParameterBuilder();
+        builder.setHostname("").setPort(1234).setIgnoreConflicts(false).setForceUpdate(true);
+        final ApexPdpPolicyForwarderParameterGroup configurationParameters =
+                new ApexPdpPolicyForwarderParameterGroup(builder);
+        configurationParameters.setName("myConfiguration");
+
+        assertEquals(ValidationStatus.INVALID, configurationParameters.validate().getStatus());
+    }
+
+    @Test
+    public void testInvalidPort() {
+        final ApexPdpPolicyForwarderParameterBuilder builder = new ApexPdpPolicyForwarderParameterBuilder();
+        builder.setHostname("10.10.10.10").setPort(-1).setIgnoreConflicts(false).setForceUpdate(true);
+        final ApexPdpPolicyForwarderParameterGroup configurationParameters =
+                new ApexPdpPolicyForwarderParameterGroup(builder);
+        configurationParameters.setName("myConfiguration");
+
+        assertEquals(ValidationStatus.INVALID, configurationParameters.validate().getStatus());
+    }
+}
diff --git a/plugins/forwarding-plugins/src/test/java/org/onap/policy/distribution/forwarding/apex/pdp/ApexPdpPolicyForwarderTest.java b/plugins/forwarding-plugins/src/test/java/org/onap/policy/distribution/forwarding/apex/pdp/ApexPdpPolicyForwarderTest.java
new file mode 100644
index 00000000..abf5b508
--- /dev/null
+++ b/plugins/forwarding-plugins/src/test/java/org/onap/policy/distribution/forwarding/apex/pdp/ApexPdpPolicyForwarderTest.java
@@ -0,0 +1,202 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2018 Ericsson. 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.distribution.forwarding.apex.pdp;
+
+import static org.junit.Assert.assertTrue;
+import static org.junit.Assert.fail;
+import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.verify;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.lang.reflect.Field;
+import java.util.ArrayList;
+import java.util.Collection;
+
+import org.junit.AfterClass;
+import org.junit.BeforeClass;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.Mockito;
+import org.mockito.runners.MockitoJUnitRunner;
+import org.onap.policy.apex.core.deployment.EngineServiceFacade;
+import org.onap.policy.apex.model.basicmodel.concepts.ApexException;
+import org.onap.policy.common.parameters.ParameterGroup;
+import org.onap.policy.common.parameters.ParameterService;
+import org.onap.policy.distribution.forwarding.PolicyForwardingException;
+import org.onap.policy.distribution.model.ApexPdpPolicy;
+import org.onap.policy.distribution.model.Policy;
+
+@RunWith(MockitoJUnitRunner.class)
+public class ApexPdpPolicyForwarderTest {
+
+    private static final String HOST_NAME = "10.10.10.10";
+    private static final int PORT = 1234;
+    private static final boolean IGNORE_CONFLICTS = false;
+    private static final boolean FORCE_UPDATE = true;
+    private static final String GROUP_NAME = "apexPdpConfiguration";
+
+    @Mock
+    EngineServiceFacade engineServiceFacade;
+
+    /**
+     * Set up.
+     */
+    @BeforeClass
+    public static void setUp() {
+        final ApexPdpPolicyForwarderParameterBuilder builder = new ApexPdpPolicyForwarderParameterBuilder();
+        builder.setHostname(HOST_NAME).setPort(PORT).setIgnoreConflicts(IGNORE_CONFLICTS).setForceUpdate(FORCE_UPDATE);
+        final ParameterGroup parameterGroup = new ApexPdpPolicyForwarderParameterGroup(builder);
+        parameterGroup.setName(GROUP_NAME);
+        ParameterService.register(parameterGroup);
+    }
+
+    /**
+     * Tear down.
+     */
+    @AfterClass
+    public static void tearDown() {
+        ParameterService.deregister(GROUP_NAME);
+    }
+
+    @Test
+    public void testForwardPolicy() throws ApexException, FileNotFoundException, IOException, PolicyForwardingException,
+            NoSuchFieldException, SecurityException, IllegalArgumentException, IllegalAccessException {
+
+        final FileInputStream fis = new FileInputStream(File.createTempFile("policy1", null));
+        final Collection<Policy> policies = new ArrayList<>();
+        final ApexPdpPolicyForwarder forwarder = new ApexPdpPolicyForwarder();
+        forwarder.configure(GROUP_NAME);
+
+        final Field forwarderField = forwarder.getClass().getDeclaredField("engineServiceFacade");
+        forwarderField.setAccessible(true);
+        forwarderField.set(forwarder, engineServiceFacade);
+
+        final ApexPdpPolicy policy = new ApexPdpPolicy("policy", fis);
+        policies.add(policy);
+
+        try {
+            forwarder.forward(policies);
+            verify(engineServiceFacade, times(1)).init();
+            verify(engineServiceFacade, times(1)).deployModel("policy", fis, IGNORE_CONFLICTS, FORCE_UPDATE);
+        } catch (final Exception exp) {
+            fail("Test must not throw an exception");
+        }
+    }
+
+    @Test
+    public void testForwardPolicyError()
+            throws ApexException, FileNotFoundException, IOException, PolicyForwardingException, NoSuchFieldException,
+            SecurityException, IllegalArgumentException, IllegalAccessException {
+
+        final FileInputStream fis = new FileInputStream(File.createTempFile("policy1", null));
+        final Collection<Policy> policies = new ArrayList<>();
+        final ApexPdpPolicyForwarder forwarder = new ApexPdpPolicyForwarder();
+        forwarder.configure(GROUP_NAME);
+
+        Mockito.doThrow(new ApexException("Failed")).when(engineServiceFacade).deployModel("policy1", fis,
+                IGNORE_CONFLICTS, FORCE_UPDATE);
+
+        final Field decodersField = forwarder.getClass().getDeclaredField("engineServiceFacade");
+        decodersField.setAccessible(true);
+        decodersField.set(forwarder, engineServiceFacade);
+
+        final ApexPdpPolicy policy1 = new ApexPdpPolicy("policy1", fis);
+        policies.add(policy1);
+
+        try {
+            forwarder.forward(policies);
+            fail("Test must throw an exception");
+        } catch (final Exception exp) {
+            assertTrue(exp.getMessage().contains("Error sending policy to apex-pdp engine"));
+        }
+
+    }
+
+    @Test
+    public void testForwardMoreThanOnePolicy()
+            throws ApexException, FileNotFoundException, IOException, PolicyForwardingException, NoSuchFieldException,
+            SecurityException, IllegalArgumentException, IllegalAccessException {
+
+        final Collection<Policy> policies = new ArrayList<>();
+        final ApexPdpPolicyForwarder forwarder = new ApexPdpPolicyForwarder();
+        forwarder.configure(GROUP_NAME);
+
+        final Field forwarderField = forwarder.getClass().getDeclaredField("engineServiceFacade");
+        forwarderField.setAccessible(true);
+        forwarderField.set(forwarder, engineServiceFacade);
+
+        final ApexPdpPolicy policy1 =
+                new ApexPdpPolicy("policy1", new FileInputStream(File.createTempFile("policy1", null)));
+        policies.add(policy1);
+
+        final ApexPdpPolicy policy2 =
+                new ApexPdpPolicy("policy2", new FileInputStream(File.createTempFile("policy2", null)));
+        policies.add(policy2);
+
+        try {
+            forwarder.forward(policies);
+            fail("Test must throw an exception");
+        } catch (final Exception exp) {
+            assertTrue(exp.getMessage().contains("More than one apex policy cannot be forwarded to an apex engine"));
+        }
+    }
+
+    @Test
+    public void testForwardUnsupportedPolicy()
+            throws ApexException, FileNotFoundException, IOException, PolicyForwardingException, NoSuchFieldException,
+            SecurityException, IllegalArgumentException, IllegalAccessException {
+
+        final Collection<Policy> policies = new ArrayList<>();
+        final ApexPdpPolicyForwarder forwarder = new ApexPdpPolicyForwarder();
+        forwarder.configure(GROUP_NAME);
+
+        final Field forwarderField = forwarder.getClass().getDeclaredField("engineServiceFacade");
+        forwarderField.setAccessible(true);
+        forwarderField.set(forwarder, engineServiceFacade);
+
+        final Policy policy = new UnsupportedPolicy();
+        policies.add(policy);
+
+        try {
+            forwarder.forward(policies);
+            fail("Test must throw an exception");
+        } catch (final Exception exp) {
+            assertTrue(exp.getMessage().contains("Ignoring the policy as it is not an apex-pdp policy"));
+        }
+    }
+
+    class UnsupportedPolicy implements Policy {
+
+        @Override
+        public String getPolicyName() {
+            return "unsupported";
+        }
+
+        @Override
+        public String getPolicyType() {
+            return "unsupported";
+        }
+    }
+}