CLI command to do what scr:list used to do

Change-Id: I7cb884b139311019d9c7f1d359bf245cf2c738cc
diff --git a/cli/src/main/java/org/onosproject/cli/ScrListCommand.java b/cli/src/main/java/org/onosproject/cli/ScrListCommand.java
new file mode 100644
index 0000000..2de0c8e
--- /dev/null
+++ b/cli/src/main/java/org/onosproject/cli/ScrListCommand.java
@@ -0,0 +1,63 @@
+/*
+ * Copyright 2017-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.cli;
+
+import org.apache.karaf.shell.api.action.Command;
+import org.apache.karaf.shell.api.action.lifecycle.Service;
+import org.osgi.service.component.runtime.ServiceComponentRuntime;
+import org.osgi.service.component.runtime.dto.ComponentConfigurationDTO;
+
+import java.util.Formatter;
+
+/**
+ * CLI command to dump out the SCR components list in the old karaf format.
+ */
+@Service
+@Command(scope = "onos", name = "scr-list",
+         description = "List components")
+public class ScrListCommand extends AbstractShellCommand {
+
+    @Override
+    protected void doExecute() {
+        StringBuilder output = new StringBuilder();
+        Formatter formatter = new Formatter(output);
+        ServiceComponentRuntime scrService = get(ServiceComponentRuntime.class);
+
+        scrService.getComponentDescriptionDTOs()
+            .forEach(componentDto -> {
+                scrService.getComponentConfigurationDTOs(componentDto)
+                    .forEach(configurationDto -> {
+                        String state;
+                        switch (configurationDto.state) {
+                            case ComponentConfigurationDTO.ACTIVE: {
+                                state = "ACTIVE";
+                                break;
+                            }
+                            case ComponentConfigurationDTO.SATISFIED: {
+                                state = "SATISFIED";
+                                break;
+                            }
+                            default: {
+                                state = "UNKNOWN";
+                            }
+                        }
+                        formatter.format("%3d | %9s | %s\n", configurationDto.id, state, componentDto.name);
+                    });
+                });
+        print(output.toString());
+    }
+
+}