Hi all,
I'm writing an application to get flow from the datastore.
I can get the flow from the restful API:
http://127.0.0.1:8181/restconf/operational/opendaylight-inventory:nodes/node/openflow:3/flow-node-inventory:table/0
{
"flow-node-inventory:table": [
{
"id": 0,
"opendaylight-flow-table-statistics:flow-table-statistics": {
"active-flows": 1,
"packets-looked-up": 25,
"packets-matched": 6
},
"flow": [
{
"id": "#UF$TABLE*0-35",
"idle-timeout": 0,
"cookie": 259813845,
"flags": "NO_PKT_COUNTS NO_BYT_COUNTS",
"hard-timeout": 0,
"instructions": {
"instruction": [
{
"order": 0,
"apply-actions": {
"action": [
{
"order": 0,
"output-action": {
"output-node-connector":
"CONTROLLER",
"max-length": 200
}
}
]
}
}
]
},
"cookie_mask": 0,
"opendaylight-flow-statistics:flow-statistics": {
"duration": {
"nanosecond": 701000000,
"second": 30
},
"byte-count": 2376,
"packet-count": 24
},
"priority": 510,
"table_id": 0,
"match": {
"ethernet-match": {
"ethernet-destination": {
"address": "01:23:00:00:00:01"
},
"ethernet-type": {
"type": 35020
}
}
}
}
]
}
]
}
However, when I tried to get flow inside the application as the following I
can't get anything:
final ReadWriteTransaction rx =
dataBroker.newReadWriteTransaction();
try {
Optional<Node> data =
rx.read(LogicalDatastoreType.OPERATIONAL,
InstanceIdentifier.builder(Nodes.class)..child(Node.class, new
NodeKey("openflow:3")).build()).checkedGet();
if (data.isPresent()) {
Node node = data.get();
FlowCapableNode flowCapableNode =
node.getAugmentation(FlowCapableNode.class);
System.out.println("Flow: " +
flowCapableNode.getTable().get(0).getFlow());
}
} catch (ReadFailedException e1) {
e1.printStackTrace();
}
Console output: Flow: []
The switches were created by Mininet through:
mn --topo linear,3 --controller=remote --switch=ovs,protocols=OpenFlow13
Mininet version: 2.3.0d1
OvS version: 2.8.1
If anyone has any thought I'm really appreciated.
Thank you.
Best regards,
James
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