[ONOS-7732] Automating switch workflow: api, app, and sample workflows

Change-Id: Iee87d4fe6cf61c1f8904d1d77df5f913a712b64a
diff --git a/apps/workflow/app/src/main/java/org/onosproject/workflow/cli/WorkFlowStoreCommand.java b/apps/workflow/app/src/main/java/org/onosproject/workflow/cli/WorkFlowStoreCommand.java
new file mode 100644
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--- /dev/null
+++ b/apps/workflow/app/src/main/java/org/onosproject/workflow/cli/WorkFlowStoreCommand.java
@@ -0,0 +1,73 @@
+/*
+ * Copyright 2018-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.workflow.cli;
+
+import org.apache.karaf.shell.commands.Argument;
+import org.apache.karaf.shell.commands.Command;
+import org.onosproject.cli.AbstractShellCommand;
+import org.onosproject.workflow.api.Workflow;
+import org.onosproject.workflow.api.WorkflowStore;
+
+import java.util.Objects;
+import java.net.URI;
+
+@Command(scope = "onos", name = "workflowstore", description = "workflow store cli")
+public class WorkFlowStoreCommand extends AbstractShellCommand {
+
+    @Argument (index = 0, name = "cmd", description = "command(rm)", required = false)
+    private String cmd = null;
+
+    @Argument (index = 1, name = "id", description = "workflow id(URI)", required = false)
+    private String id = null;
+
+    @Override
+    protected void execute() {
+
+        if (Objects.isNull(cmd)) {
+            printAllWorkflow();
+            return;
+        }
+
+        if (Objects.isNull(id)) {
+            print("invalid id");
+            return;
+        }
+
+        switch (cmd) {
+            case "rm":
+                rmWorkflow(id);
+                break;
+            default:
+                print("Unsupported cmd: " + cmd);
+        }
+    }
+
+    private void rmWorkflow(String id) {
+        WorkflowStore workflowStore = get(WorkflowStore.class);
+        workflowStore.unregister(URI.create(id));
+    }
+
+    private void printAllWorkflow() {
+        WorkflowStore workflowStore = get(WorkflowStore.class);
+        for (Workflow workflow : workflowStore.getAll()) {
+            print(getWorkflowString(workflow));
+        }
+    }
+
+    private String getWorkflowString(Workflow workflow) {
+        return workflow.toString();
+    }
+}