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/*
* Copyright 2014-2015 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.io.IOException;
import java.io.InputStream;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.stream.StreamSupport;
import javax.ws.rs.Consumes;
import javax.ws.rs.DELETE;
import javax.ws.rs.GET;
import javax.ws.rs.POST;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
import org.onlab.util.ItemNotFoundException;
import org.onosproject.net.Device;
import org.onosproject.net.DeviceId;
import org.onosproject.net.device.DeviceService;
import org.onosproject.net.flow.FlowEntry;
import org.onosproject.net.flow.FlowRule;
import org.onosproject.net.flow.FlowRuleService;
import org.onosproject.rest.AbstractWebResource;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.node.ArrayNode;
import com.fasterxml.jackson.databind.node.ObjectNode;
/**
* Query and program flow rules.
*/
@Path("flows")
public class FlowsWebResource extends AbstractWebResource {
public static final String DEVICE_NOT_FOUND = "Device is not found";
final FlowRuleService service = get(FlowRuleService.class);
final ObjectNode root = mapper().createObjectNode();
final ArrayNode flowsNode = root.putArray("flows");
/**
* Get all flow entries. Returns array of all flow rules in the system.
* @rsModel Flows
* @return array of all the intents in the system
*/
@GET
@Produces(MediaType.APPLICATION_JSON)
public Response getFlows() {
final Iterable<Device> devices = get(DeviceService.class).getDevices();
for (final Device device : devices) {
final Iterable<FlowEntry> flowEntries = service.getFlowEntries(device.id());
if (flowEntries != null) {
for (final FlowEntry entry : flowEntries) {
flowsNode.add(codec(FlowEntry.class).encode(entry, this));
}
}
}
return ok(root).build();
}
/**
* Get flow entries of a device. Returns array of all flow rules for the
* specified device.
* @rsModel Flows
* @param deviceId device identifier
* @return flow data as an array
*/
@GET
@Produces(MediaType.APPLICATION_JSON)
@Path("{deviceId}")
public Response getFlowByDeviceId(@PathParam("deviceId") String deviceId) {
final Iterable<FlowEntry> flowEntries =
service.getFlowEntries(DeviceId.deviceId(deviceId));
if (!flowEntries.iterator().hasNext()) {
throw new ItemNotFoundException(DEVICE_NOT_FOUND);
}
for (final FlowEntry entry : flowEntries) {
flowsNode.add(codec(FlowEntry.class).encode(entry, this));
}
return ok(root).build();
}
/**
* Get flow rule. Returns the flow entry specified by the device id and
* flow rule id.
* @rsModel Flows
* @param deviceId device identifier
* @param flowId flow rule identifier
* @return flow data as an array
*/
@GET
@Produces(MediaType.APPLICATION_JSON)
@Path("{deviceId}/{flowId}")
public Response getFlowByDeviceIdAndFlowId(@PathParam("deviceId") String deviceId,
@PathParam("flowId") long flowId) {
final Iterable<FlowEntry> flowEntries =
service.getFlowEntries(DeviceId.deviceId(deviceId));
if (!flowEntries.iterator().hasNext()) {
throw new ItemNotFoundException(DEVICE_NOT_FOUND);
}
for (final FlowEntry entry : flowEntries) {
if (entry.id().value() == flowId) {
flowsNode.add(codec(FlowEntry.class).encode(entry, this));
}
}
return ok(root).build();
}
/**
* Create new flow rule. Creates and installs a new flow rule for the
* specified device.
* @rsModel FlowsPost
* @param deviceId device identifier
* @param stream flow rule JSON
* @return status of the request - CREATED if the JSON is correct,
* BAD_REQUEST if the JSON is invalid
*/
@POST
@Path("{deviceId}")
@Consumes(MediaType.APPLICATION_JSON)
@Produces(MediaType.APPLICATION_JSON)
public Response createFlow(@PathParam("deviceId") String deviceId,
InputStream stream) {
URI location;
try {
ObjectNode jsonTree = (ObjectNode) mapper().readTree(stream);
JsonNode specifiedDeviceId = jsonTree.get("deviceId");
if (specifiedDeviceId != null &&
!specifiedDeviceId.asText().equals(deviceId)) {
throw new IllegalArgumentException(
"Invalid deviceId in flow creation request");
}
jsonTree.put("deviceId", deviceId);
FlowRule rule = codec(FlowRule.class).decode(jsonTree, this);
service.applyFlowRules(rule);
location = new URI(Long.toString(rule.id().value()));
} catch (IOException | URISyntaxException ex) {
throw new IllegalArgumentException(ex);
}
return Response
.created(location)
.build();
}
/**
* Remove flow rule. Removes the specified flow rule.
*
* @param deviceId device identifier
* @param flowId flow rule identifier
*/
@DELETE
@Produces(MediaType.APPLICATION_JSON)
@Path("{deviceId}/{flowId}")
public void deleteFlowByDeviceIdAndFlowId(@PathParam("deviceId") String deviceId,
@PathParam("flowId") long flowId) {
final Iterable<FlowEntry> flowEntries =
service.getFlowEntries(DeviceId.deviceId(deviceId));
if (!flowEntries.iterator().hasNext()) {
throw new ItemNotFoundException(DEVICE_NOT_FOUND);
}
StreamSupport.stream(flowEntries.spliterator(), false)
.filter(entry -> entry.id().value() == flowId)
.forEach(service::removeFlowRules);
}
}
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