Add the logic of generating ovs bridges on bootstrap kubevirt node

Change-Id: Id691738ee31b509a143143103152111dfb47a606
diff --git a/apps/kubevirt-node/app/src/main/java/org/onosproject/kubevirtnode/cli/KubevirtListNodesCommand.java b/apps/kubevirt-node/app/src/main/java/org/onosproject/kubevirtnode/cli/KubevirtListNodesCommand.java
new file mode 100644
index 0000000..fc4555a
--- /dev/null
+++ b/apps/kubevirt-node/app/src/main/java/org/onosproject/kubevirtnode/cli/KubevirtListNodesCommand.java
@@ -0,0 +1,87 @@
+/*
+ * Copyright 2020-present Open Networking Foundation
+ *
+ * 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.
+ */
+package org.onosproject.kubevirtnode.cli;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.node.ArrayNode;
+import com.google.common.collect.ImmutableList;
+import com.google.common.collect.Lists;
+import org.apache.commons.lang.StringUtils;
+import org.apache.karaf.shell.api.action.Command;
+import org.apache.karaf.shell.api.action.lifecycle.Service;
+import org.onosproject.cli.AbstractShellCommand;
+import org.onosproject.kubevirtnode.api.KubevirtNode;
+import org.onosproject.kubevirtnode.api.KubevirtNodeService;
+
+import java.util.Comparator;
+import java.util.List;
+
+import static org.onosproject.kubevirtnode.util.KubevirtNodeUtil.genFormatString;
+import static org.onosproject.kubevirtnode.util.KubevirtNodeUtil.prettyJson;
+
+/**
+ * Lists all nodes registered to the service.
+ */
+@Service
+@Command(scope = "onos", name = "kubevirt-nodes",
+        description = "Lists all nodes registered in KubeVirt node service")
+public class KubevirtListNodesCommand extends AbstractShellCommand {
+
+    private static final int HOSTNAME_LENGTH = 35;
+    private static final int TYPE_LENGTH = 15;
+    private static final int MANAGEMENT_IP_LENGTH = 25;
+    private static final int DATA_IP_LENGTH = 25;
+    private static final int STATUS = 15;
+    private static final int MARGIN_LENGTH = 2;
+
+    @Override
+    protected void doExecute() throws Exception {
+        KubevirtNodeService nodeService = get(KubevirtNodeService.class);
+        List<KubevirtNode> nodes = Lists.newArrayList(nodeService.nodes());
+        nodes.sort(Comparator.comparing(KubevirtNode::hostname));
+
+        String format = genFormatString(ImmutableList.of(HOSTNAME_LENGTH,
+                TYPE_LENGTH, MANAGEMENT_IP_LENGTH, DATA_IP_LENGTH, STATUS));
+
+        if (outputJson()) {
+            print("%s", json(nodes));
+        } else {
+            print(format, "Hostname", "Type", "Management IP", "Data IP", "State");
+            for (KubevirtNode node : nodes) {
+                print(format,
+                        StringUtils.substring(node.hostname(), 0,
+                                HOSTNAME_LENGTH - MARGIN_LENGTH),
+                        node.type(),
+                        StringUtils.substring(node.managementIp().toString(), 0,
+                                MANAGEMENT_IP_LENGTH - MARGIN_LENGTH),
+                        node.dataIp() != null ? StringUtils.substring(
+                                node.dataIp().toString(), 0,
+                                DATA_IP_LENGTH - MARGIN_LENGTH) : "",
+                        node.state());
+            }
+            print("Total %s nodes", nodeService.nodes().size());
+        }
+    }
+
+    private String json(List<KubevirtNode> nodes) {
+        ObjectMapper mapper = new ObjectMapper();
+        ArrayNode result = mapper.createArrayNode();
+        for (KubevirtNode node : nodes) {
+            result.add(jsonForEntity(node, KubevirtNode.class));
+        }
+        return prettyJson(mapper, result.toString());
+    }
+}