UI for server device driver
This patch introduces a graphical user interface
that visualizes the CPU utilization of server devices
using bar charts.
Code optimizations and a bug fix is applied after first
code review.
Additional bar plots are implemented, visualizing
average throughput and latency per core,
when these statistics are present.
Added external library in Bazel's BUILD file.
Fixed scaling and font issues in the UIs after getting
feedback from ONOS reviewers.
Change-Id: I92972ef871e6a91dd70cdffd8cd650f498ffca26
Signed-off-by: Georgios Katsikas <katsikas.gp@gmail.com>
diff --git a/drivers/server/src/main/java/org/onosproject/drivers/server/gui/CpuUI.java b/drivers/server/src/main/java/org/onosproject/drivers/server/gui/CpuUI.java
new file mode 100644
index 0000000..31fc57a
--- /dev/null
+++ b/drivers/server/src/main/java/org/onosproject/drivers/server/gui/CpuUI.java
@@ -0,0 +1,91 @@
+/*
+ * 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.drivers.server.gui;
+
+import org.onosproject.ui.UiExtension;
+import org.onosproject.ui.UiExtensionService;
+import org.onosproject.ui.UiMessageHandlerFactory;
+import org.onosproject.ui.UiView;
+
+import com.google.common.collect.ImmutableList;
+import org.apache.felix.scr.annotations.Activate;
+import org.apache.felix.scr.annotations.Component;
+import org.apache.felix.scr.annotations.Deactivate;
+import org.apache.felix.scr.annotations.Reference;
+import org.apache.felix.scr.annotations.ReferenceCardinality;
+import org.apache.felix.scr.annotations.Service;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.util.List;
+
+import static org.onosproject.ui.UiView.Category.NETWORK;
+import static org.onosproject.ui.GlyphConstants.ENDSTATION;
+
+/**
+ * Mechanism to stream CPU data to the GUI.
+ */
+@Component(immediate = true, enabled = true)
+@Service(value = CpuUI.class)
+public class CpuUI {
+
+ private final Logger log = LoggerFactory.getLogger(getClass());
+
+ /**
+ * GUI Information.
+ */
+ private static final String CPU_ID = "cpu";
+ private static final String CPU_TEXT = "Servers-CPU";
+ private static final String RES_PATH = "gui";
+ private static final ClassLoader CL = CpuUI.class.getClassLoader();
+
+ // Factory for UI message handlers
+ private final UiMessageHandlerFactory messageHandlerFactory =
+ () -> ImmutableList.of(new CpuViewMessageHandler());
+
+ // List of application views
+ private final List<UiView> views = ImmutableList.of(
+ new UiView(NETWORK, CPU_ID, CPU_TEXT, ENDSTATION)
+ );
+
+ // Application UI extension
+ private final UiExtension uiExtension =
+ new UiExtension.Builder(CL, views)
+ .messageHandlerFactory(messageHandlerFactory)
+ .resourcePath(RES_PATH)
+ .build();
+
+ /**
+ * Interact with ONOS.
+ */
+ @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+ protected UiExtensionService uiExtensionService;
+
+ @Activate
+ protected void activate() {
+ uiExtensionService.register(uiExtension);
+ log.info("Started");
+ }
+
+ @Deactivate
+ protected void deactivate() {
+ uiExtensionService.unregister(uiExtension);
+ log.info("Stopped");
+ }
+
+}