1 files changed, 95 insertions, 0 deletions
diff --git a/framework/src/onos/web/api/src/main/java/org/onosproject/rest/resources/StatisticsWebResource.java b/framework/src/onos/web/api/src/main/java/org/onosproject/rest/resources/StatisticsWebResource.java
new file mode 100644
index 00000000..2ffa2295
--- /dev/null
+++ b/framework/src/onos/web/api/src/main/java/org/onosproject/rest/resources/StatisticsWebResource.java
@@ -0,0 +1,95 @@
+/*
+ * Copyright 2015 Open Networking Laboratory
+ *
+ * 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.rest.resources;
+
+import java.util.Spliterator;
+import java.util.Spliterators;
+import java.util.stream.StreamSupport;
+
+import javax.ws.rs.GET;
+import javax.ws.rs.Path;
+import javax.ws.rs.Produces;
+import javax.ws.rs.QueryParam;
+import javax.ws.rs.core.Context;
+import javax.ws.rs.core.MediaType;
+import javax.ws.rs.core.Response;
+import javax.ws.rs.core.UriBuilder;
+import javax.ws.rs.core.UriInfo;
+
+import org.onosproject.codec.JsonCodec;
+import org.onosproject.net.ConnectPoint;
+import org.onosproject.net.Link;
+import org.onosproject.net.link.LinkService;
+import org.onosproject.net.statistic.Load;
+import org.onosproject.net.statistic.StatisticService;
+import org.onosproject.rest.AbstractWebResource;
+
+import com.fasterxml.jackson.databind.node.ArrayNode;
+import com.fasterxml.jackson.databind.node.ObjectNode;
+
+import static org.onosproject.net.DeviceId.deviceId;
+import static org.onosproject.net.PortNumber.portNumber;
+
+/**
+ * Query flow statistics.
+ */
+@Path("statistics")
+public class StatisticsWebResource  extends AbstractWebResource {
+    @Context
+    UriInfo uriInfo;
+
+    /**
+     * Get load statistics for all links or for a specific link.
+     *
+     * @param deviceId (optional) device ID for a specific link
+     * @param port (optional) port number for a specified link
+     * @return JSON encoded array lof Load objects
+     */
+    @GET
+    @Path("flows/link")
+    @Produces(MediaType.APPLICATION_JSON)
+    public Response getLoads(@QueryParam("device") String deviceId,
+                             @QueryParam("port") String port) {
+        Iterable<Link> links;
+
+        if (deviceId == null || port == null) {
+            links = get(LinkService.class).getLinks();
+        } else {
+            ConnectPoint connectPoint = new ConnectPoint(deviceId(deviceId),
+                    portNumber(port));
+            links = get(LinkService.class).getLinks(connectPoint);
+        }
+        ObjectNode result = mapper().createObjectNode();
+        ArrayNode loads = mapper().createArrayNode();
+        JsonCodec<Load> loadCodec = codec(Load.class);
+        StatisticService statsService = getService(StatisticService.class);
+
+        StreamSupport.stream(Spliterators.spliteratorUnknownSize(
+                links.iterator(), Spliterator.ORDERED), false)
+                .forEach(link -> {
+                    ObjectNode loadNode = loadCodec.encode(statsService.load(link), this);
+
+                    UriBuilder locationBuilder = uriInfo.getBaseUriBuilder()
+                            .path("links")
+                            .queryParam("device", link.src().deviceId().toString())
+                            .queryParam("port", link.src().port().toString());
+                    loadNode.put("link", locationBuilder.build().toString());
+                    loads.add(loadNode);
+                });
+        result.set("loads", loads);
+        return ok(result).build();
+    }
+}