Proposal to remove OSGi dependencies from the CCSDK project

Dependencies on the OSGi frameworks and libraries are removed
by integrating the CCSDK project with the lighty.io.
It's a toolkit that allows to use ODL services (in this case
core services and the Restconf) without the dependency
on the Karaf framework and the Blueprint DI.

In this change are created the lighty.io modules which
initialize and expose same services as the Blueprint DI in
the blueprint.xml files.

More info about the lighty.io - https://lighty.io

Change-Id: Ieb512990e191bbb5a9403f05cdce0b79640ce474
Signed-off-by: Matej Perina <matej.perina@pantheon.tech>
Signed-off-by: Samuel Kontris <samuel.kontris@pantheon.tech>

2 files changed, 158 insertions, 0 deletions

diff --git a/ccsdk-northbound-lighty/pom.xml b/ccsdk-northbound-lighty/pom.xml
new file mode 100755
index 000000000..a75f235aa
--- /dev/null
+++ b/ccsdk-northbound-lighty/pom.xml
@@ -0,0 +1,39 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+
+	<parent>
+		<groupId>org.onap.ccsdk.parent</groupId>
+		<artifactId>odlparent-lite</artifactId>
+		<version>1.4.0-SNAPSHOT</version>
+		<relativePath/>
+	</parent>
+
+	<groupId>org.onap.ccsdk.sli.northbound</groupId>
+	<artifactId>ccsdk-northbound-lighty</artifactId>
+	<version>0.6.0-SNAPSHOT</version>
+	<packaging>jar</packaging>
+
+	<dependencies>
+		<dependency>
+			<groupId>org.onap.ccsdk.sli.core</groupId>
+			<artifactId>ccsdk-core-lighty</artifactId>
+			<version>${project.version}</version>
+		</dependency>
+		<dependency>
+			<groupId>org.onap.ccsdk.sli.northbound</groupId>
+			<artifactId>asdcApi-lighty</artifactId>
+			<version>${project.version}</version>
+		</dependency>
+		<dependency>
+			<groupId>org.onap.ccsdk.sli.northbound</groupId>
+			<artifactId>dataChange-lighty</artifactId>
+			<version>${project.version}</version>
+		</dependency>
+		<dependency>
+			<groupId>org.onap.ccsdk.sli.northbound</groupId>
+			<artifactId>lcm-lighty</artifactId>
+			<version>${project.version}</version>
+		</dependency>
+	</dependencies>
+</project>
diff --git a/ccsdk-northbound-lighty/src/main/java/org/onap/ccsdk/sli/northbound/lighty/CcsdkNorhboundLightyModule.java b/ccsdk-northbound-lighty/src/main/java/org/onap/ccsdk/sli/northbound/lighty/CcsdkNorhboundLightyModule.java
new file mode 100644
index 000000000..ce907bd95
--- /dev/null
+++ b/ccsdk-northbound-lighty/src/main/java/org/onap/ccsdk/sli/northbound/lighty/CcsdkNorhboundLightyModule.java
@@ -0,0 +1,119 @@
+/*
+ * ============LICENSE_START==========================================
+ * Copyright (c) 2019 PANTHEON.tech s.r.o.
+ * ===================================================================
+ * 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.ccsdk.sli.northbound.lighty;
+
+import io.lighty.core.controller.api.AbstractLightyModule;
+import org.onap.ccsdk.sli.core.lighty.common.CcsdkLightyUtils;
+import org.onap.ccsdk.sli.core.sli.provider.SvcLogicService;
+import org.onap.ccsdk.sli.northbound.asdcapi.lighty.AsdcApiModule;
+import org.onap.ccsdk.sli.northbound.dataChange.lighty.DataChangeModule;
+import org.onap.ccsdk.sli.northbound.lcm.lighty.LcmModule;
+import org.opendaylight.controller.md.sal.binding.api.DataBroker;
+import org.opendaylight.controller.md.sal.binding.api.NotificationPublishService;
+import org.opendaylight.controller.sal.binding.api.RpcProviderRegistry;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * The implementation of the {@link io.lighty.core.controller.api.LightyModule} that groups all other LightyModules
+ * from the ccsdk-sli-northbound repository so they can be all treated as one component (for example started/stopped at once).
+ * For more information about the lighty.io visit the website https://lighty.io.
+ */
+public class CcsdkNorhboundLightyModule extends AbstractLightyModule {
+
+    private static final Logger LOG = LoggerFactory.getLogger(CcsdkNorhboundLightyModule.class);
+
+    private final SvcLogicService svcLogicService;
+    private final DataBroker dataBroker;
+    private final NotificationPublishService publishService;
+    private final RpcProviderRegistry rpcProviderRegistry;
+
+    private AsdcApiModule asdcApiModule;
+    private DataChangeModule dataChangeModule;
+    private LcmModule lcmModule;
+
+    public CcsdkNorhboundLightyModule(SvcLogicService svcLogicService, DataBroker dataBroker,
+            NotificationPublishService publishService, RpcProviderRegistry rpcProviderRegistry) {
+
+        this.svcLogicService = svcLogicService;
+        this.dataBroker = dataBroker;
+        this.publishService = publishService;
+        this.rpcProviderRegistry = rpcProviderRegistry;
+    }
+
+    protected boolean initProcedure() {
+        LOG.debug("Initializing CCSDK Northbound Lighty module...");
+
+        this.asdcApiModule = new AsdcApiModule(svcLogicService, dataBroker, publishService, rpcProviderRegistry);
+        if (!CcsdkLightyUtils.startLightyModule(asdcApiModule)) {
+            LOG.error("Unable to start AsdcApiModule in CCSDK Northbound Lighty module!");
+            return false;
+        }
+
+        this.dataChangeModule = new DataChangeModule(svcLogicService, dataBroker, publishService, rpcProviderRegistry);
+        if (!CcsdkLightyUtils.startLightyModule(dataChangeModule)) {
+            LOG.error("Unable to start DataChangeModule in CCSDK Northbound Lighty module!");
+            return false;
+        }
+
+        this.lcmModule = new LcmModule(svcLogicService, dataBroker, publishService, rpcProviderRegistry);
+        if (!CcsdkLightyUtils.startLightyModule(lcmModule)) {
+            LOG.error("Unable to start LcmModule in CCSDK Northbound Lighty module!");
+            return false;
+        }
+
+        LOG.debug("CCSDK Northbound Lighty module was initialized successfully");
+        return true;
+    }
+
+    protected boolean stopProcedure() {
+        LOG.debug("Stopping CCSDK Northbound Lighty module...");
+
+        boolean stopSuccessful = true;
+
+        if (!CcsdkLightyUtils.stopLightyModule(lcmModule)) {
+            stopSuccessful = false;
+        }
+
+        if (!CcsdkLightyUtils.stopLightyModule(dataChangeModule)) {
+            stopSuccessful = false;
+        }
+
+        if (!CcsdkLightyUtils.stopLightyModule(asdcApiModule)) {
+            stopSuccessful = false;
+        }
+
+        if (stopSuccessful) {
+            LOG.debug("CCSDK Northbound Lighty module was stopped successfully");
+        } else {
+            LOG.error("CCSDK Northbound Lighty module was not stopped successfully!");
+        }
+        return stopSuccessful;
+    }
+
+    public AsdcApiModule getAsdcApiModule() {
+        return asdcApiModule;
+    }
+
+    public DataChangeModule getDataChangeModule() {
+        return dataChangeModule;
+    }
+
+    public LcmModule getLcmModule() {
+        return lcmModule;
+    }
+}