Add legacy-config new feature

This feature makes the legacy configuration optional.
It was used by brmsgw and other tooling to provision
via its DMaaP channel.   The capability to configure
via PdpConfiguration object is kept in the core
preserving backwards compatibility, but the DMaaP
provisioning channel(s) are optional.

Issue-ID: POLICY-2618
Signed-off-by: jhh <jorge.hernandez-herrero@att.com>
Change-Id: Ia7198ac3b2810d85133c06ba5217a9c28e07ac4c
Signed-off-by: jhh <jorge.hernandez-herrero@att.com>

3 files changed, 263 insertions, 0 deletions

diff --git a/feature-legacy-config/src/test/java/org/onap/policy/drools/legacy/config/LegacyConfigFeatureTest.java b/feature-legacy-config/src/test/java/org/onap/policy/drools/legacy/config/LegacyConfigFeatureTest.java
new file mode 100644
index 00000000..d73817b8
--- /dev/null
+++ b/feature-legacy-config/src/test/java/org/onap/policy/drools/legacy/config/LegacyConfigFeatureTest.java
@@ -0,0 +1,70 @@
+/*
+ * ============LICENSE_START=======================================================
+ * ONAP
+ * ================================================================================
+ * Copyright (C) 2021 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.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.drools.legacy.config;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.onap.policy.common.endpoints.event.comm.bus.NoopTopicFactories;
+import org.onap.policy.drools.persistence.SystemPersistenceConstants;
+import org.onap.policy.drools.system.PolicyEngineConstants;
+
+public class LegacyConfigFeatureTest {
+
+    private LegacyConfigFeature configF;
+
+    /**
+     * Set up.
+     */
+    @Before
+    public void setUp() {
+        SystemPersistenceConstants.getManager().setConfigurationDir("target/test-classes");
+        configF = new LegacyConfigFeature();
+    }
+
+    /**
+     * Tear down.
+     */
+    @After
+    public void tearDown() {
+        NoopTopicFactories.getSourceFactory().destroy();
+        NoopTopicFactories.getSinkFactory().destroy();
+        SystemPersistenceConstants.getManager().setConfigurationDir(null);
+    }
+
+    @Test
+    public void getSequenceNumber() {
+        assertEquals(LegacyConfigFeature.SEQNO, new LegacyConfigFeature().getSequenceNumber());
+    }
+
+    @Test
+    public void afterOpenBeforeShutdown() {
+        assertFalse(LegacyConfigFeature.getLegacyConfig().isAlive());
+        configF.afterOpen(PolicyEngineConstants.getManager());
+        assertTrue(LegacyConfigFeature.getLegacyConfig().isAlive());
+        configF.beforeShutdown(PolicyEngineConstants.getManager());
+        assertFalse(LegacyConfigFeature.getLegacyConfig().isAlive());
+    }
+}
\ No newline at end of file
diff --git a/feature-legacy-config/src/test/java/org/onap/policy/drools/legacy/config/LegacyConfigTest.java b/feature-legacy-config/src/test/java/org/onap/policy/drools/legacy/config/LegacyConfigTest.java
new file mode 100644
index 00000000..d970585b
--- /dev/null
+++ b/feature-legacy-config/src/test/java/org/onap/policy/drools/legacy/config/LegacyConfigTest.java
@@ -0,0 +1,87 @@
+/*
+ * ============LICENSE_START=======================================================
+ * ONAP
+ * ================================================================================
+ * Copyright (C) 2021 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.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.drools.legacy.config;
+
+import static org.assertj.core.api.Assertions.assertThatIllegalStateException;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertTrue;
+
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.onap.policy.common.endpoints.event.comm.Topic;
+import org.onap.policy.common.endpoints.event.comm.bus.NoopTopicFactories;
+import org.onap.policy.drools.persistence.SystemPersistenceConstants;
+
+public class LegacyConfigTest {
+
+    /**
+     * Set up.
+     */
+    @Before
+    public void setUp() {
+        SystemPersistenceConstants.getManager().setConfigurationDir("target/test-classes");
+    }
+
+    /**
+     * Tear down.
+     */
+    @After
+    public void tearDown() {
+        NoopTopicFactories.getSourceFactory().destroy();
+        NoopTopicFactories.getSinkFactory().destroy();
+        SystemPersistenceConstants.getManager().setConfigurationDir(null);
+    }
+
+    @Test
+    public void testStartStop() {
+        LegacyConfig config = new LegacyConfig();
+        assertFalse(config.isAlive());
+
+        assertTrue(config.start());
+        assertTrue(config.isAlive());
+
+        config.onTopicEvent(Topic.CommInfrastructure.NOOP, "PDPD-CONFIGURATION", "{}");
+        assertTrue(config.isAlive());
+
+        assertTrue(config.stop());
+        assertFalse(config.isAlive());
+
+        config.shutdown();
+        assertFalse(config.isAlive());
+    }
+
+    @Test
+    public void testConstructors() {
+        LegacyConfig config = new LegacyConfig();
+        assertNotNull(config.getProperties());
+        assertEquals("PDPD-CONFIGURATION", config.getSource().getTopic());
+
+        SystemPersistenceConstants.getManager().setConfigurationDir("target/test-classes/bad-properties-1");
+        assertThatIllegalStateException().isThrownBy(LegacyConfig::new);
+
+        /* two sources are ok - no exception */
+        SystemPersistenceConstants.getManager().setConfigurationDir("target/test-classes/properties-2");
+        new LegacyConfig();
+    }
+}
\ No newline at end of file
diff --git a/feature-legacy-config/src/test/java/org/onap/policy/drools/server/restful/RestLegacyConfigTest.java b/feature-legacy-config/src/test/java/org/onap/policy/drools/server/restful/RestLegacyConfigTest.java
new file mode 100644
index 00000000..6dd2edbc
--- /dev/null
+++ b/feature-legacy-config/src/test/java/org/onap/policy/drools/server/restful/RestLegacyConfigTest.java
@@ -0,0 +1,106 @@
+/*
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2021 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.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.drools.server.restful;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+
+import java.util.Properties;
+import javax.ws.rs.core.Response;
+import org.junit.AfterClass;
+import org.junit.BeforeClass;
+import org.junit.Test;
+import org.onap.policy.common.endpoints.event.comm.bus.internal.BusTopicParams;
+import org.onap.policy.common.endpoints.http.client.HttpClient;
+import org.onap.policy.common.endpoints.http.client.HttpClientFactoryInstance;
+import org.onap.policy.common.endpoints.http.server.HttpServletServer;
+import org.onap.policy.common.endpoints.http.server.HttpServletServerFactoryInstance;
+import org.onap.policy.common.endpoints.http.server.YamlJacksonHandler;
+import org.onap.policy.common.gson.JacksonHandler;
+import org.onap.policy.common.utils.network.NetworkUtil;
+import org.onap.policy.drools.legacy.config.LegacyConfigFeature;
+import org.onap.policy.drools.persistence.SystemPersistenceConstants;
+import org.onap.policy.drools.system.PolicyControllerConstants;
+
+public class RestLegacyConfigTest {
+
+    private static HttpClient client;
+
+    /**
+     * Set up.
+     */
+    @BeforeClass
+    public static void setUp() throws Exception {
+        SystemPersistenceConstants.getManager().setConfigurationDir("target/test-classes");
+
+        HttpServletServerFactoryInstance.getServerFactory().destroy();
+        HttpClientFactoryInstance.getClientFactory().destroy();
+        PolicyControllerConstants.getFactory().destroy();
+
+        int port = NetworkUtil.allocPort();
+
+        HttpClientFactoryInstance.getClientFactory().build(
+                BusTopicParams.builder()
+                        .clientName("legacy")
+                        .hostname("localhost")
+                        .port(port)
+                        .basePath("policy/pdp/engine/legacy/config")
+                        .managed(true)
+                        .build());
+
+        HttpServletServer server =
+                HttpServletServerFactoryInstance.getServerFactory().build("legacy", "localhost", port, "/",
+                        true, true);
+        server.setSerializationProvider(
+                String.join(",", JacksonHandler.class.getName(), YamlJacksonHandler.class.getName()));
+        server.addServletClass("/*", RestLegacyConfigManager.class.getName());
+        server.waitedStart(5000L);
+
+        assertTrue(NetworkUtil.isTcpPortOpen("localhost", port, 40, 250L));
+        client = HttpClientFactoryInstance.getClientFactory().get("legacy");
+    }
+
+    /**
+     * Tear down.
+     */
+    @AfterClass
+    public static void tearDown() {
+        LegacyConfigFeature.getLegacyConfig().shutdown();
+        HttpClientFactoryInstance.getClientFactory().destroy();
+        HttpServletServerFactoryInstance.getServerFactory().destroy();
+        SystemPersistenceConstants.getManager().setConfigurationDir(null);
+    }
+
+    @Test
+    public void properties() {
+        Response response = client.get("properties");
+        assertEquals(Response.Status.OK.getStatusCode(), response.getStatus());
+        assertEquals(LegacyConfigFeature.getLegacyConfig().getProperties(),
+                HttpClient.getBody(response, Properties.class));
+    }
+
+    @Test
+    public void topic() {
+        Response response = client.get("source");
+        assertEquals(Response.Status.NOT_FOUND.getStatusCode(), response.getStatus());
+    }
+}
+
+
+