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gerrit.named-data.net / PSync / da278499792985d8d78b3b89e44828c27f29f65f / . / examples
tree: d90e7312600f06fb9bd79d8d6c1bd7ca5744ff58 [path history] [tgz]
  1. consumer.cpp
  2. full-sync.cpp
  3. producer.cpp
  4. README.md
  5. wscript
examples/README.md

PSync examples

By default, examples in examples/ folder are not built. To enable them, use --with-examples configure option. For example:

./waf configure --with-examples
./waf

Example binary can be found under build/examples:

  • Full sync : psync-full-sync
  • Partial sync : psync-producer and psync-consumer

If the library is installed to the system using ./waf install then the examples are also installed and can be executed directly.

Partial Sync Example

Partial sync example of PSync has two parts: producer and consumer. These can be run on a machine after starting NFD:

Producer

  • Enable the logs for producer:
export NDN_LOG=examples.PartialSyncProducerApp=INFO
  • Start the producer that will listen on /sync and publish 1 update for /a-0 ... /a-9 each.
psync-producer /sync /a 10 1
  • Sample output:
1546280442.096296 INFO: [examples.PartialSyncProducerApp] Publish: /a-1/1
1546280456.053138 INFO: [examples.PartialSyncProducerApp] Publish: /a-6/1
1546280458.210415 INFO: [examples.PartialSyncProducerApp] Publish: /a-8/1
1546280469.954134 INFO: [examples.PartialSyncProducerApp] Publish: /a-5/1
1546280472.487425 INFO: [examples.PartialSyncProducerApp] Publish: /a-2/1
1546280473.466515 INFO: [examples.PartialSyncProducerApp] Publish: /a-7/1
1546280481.882258 INFO: [examples.PartialSyncProducerApp] Publish: /a-0/1
1546280484.201229 INFO: [examples.PartialSyncProducerApp] Publish: /a-4/1
1546280489.348968 INFO: [examples.PartialSyncProducerApp] Publish: /a-9/1
1546280491.420391 INFO: [examples.PartialSyncProducerApp] Publish: /a-3/1

Consumer

  • In a new terminal, enable the logs for consumer:
export NDN_LOG=examples.PartialSyncConsumerApp=INFO
  • Run the consumer to subscribe to 5 random prefixes from the publisher on /sync
psync-consumer /sync 5
  • Sample output from the consumer shows that it received updates only for the subscribed prefixes:
1546280436.502769 INFO: [examples.PartialSyncConsumerApp] Subscribing to: /a-7
1546280436.502888 INFO: [examples.PartialSyncConsumerApp] Subscribing to: /a-9
1546280436.502911 INFO: [examples.PartialSyncConsumerApp] Subscribing to: /a-8
1546280436.502934 INFO: [examples.PartialSyncConsumerApp] Subscribing to: /a-4
1546280436.502956 INFO: [examples.PartialSyncConsumerApp] Subscribing to: /a-5
1546280458.211188 INFO: [examples.PartialSyncConsumerApp] Update: /a-8/1
1546280469.954886 INFO: [examples.PartialSyncConsumerApp] Update: /a-5/1
1546280473.467116 INFO: [examples.PartialSyncConsumerApp] Update: /a-7/1
1546280484.256181 INFO: [examples.PartialSyncConsumerApp] Update: /a-4/1
1546280489.349793 INFO: [examples.PartialSyncConsumerApp] Update: /a-9/1

Full Sync Example

To demonstrate full sync mode of PSync, psync-full-sync can be run on a machine after starting NFD:

  • Enable the logs for full sync:
export NDN_LOG=examples.FullSyncApp=INFO
  • Run the full sync example with sync prefix /sync, user prefix /a, and publish three updates for each user prefix: /a-0 and /a-1. This will simulate node a.
psync-full-sync /sync /a 2 3
  • Repeat for another user prefix, to simulate node b:
psync-full-sync /sync /b 2 3

We should see that node a and node b have received each other's updates.

  • Sample output from node a shows that it received all updates from node b successfully:
1546282730.759387 INFO: [examples.FullSyncApp] Update /b-1/1
1546282741.143225 INFO: [examples.FullSyncApp] Publish: /a-1/1
1546282749.375854 INFO: [examples.FullSyncApp] Publish: /a-0/1
1546282750.263246 INFO: [examples.FullSyncApp] Update /b-0/1
1546282765.875118 INFO: [examples.FullSyncApp] Update /b-1/2
1546282783.777807 INFO: [examples.FullSyncApp] Publish: /a-0/2
1546282794.565507 INFO: [examples.FullSyncApp] Publish: /a-0/3
1546282794.896895 INFO: [examples.FullSyncApp] Publish: /a-1/2
1546282803.839416 INFO: [examples.FullSyncApp] Update /b-0/2
1546282804.785867 INFO: [examples.FullSyncApp] Update /b-1/3
1546282845.273772 INFO: [examples.FullSyncApp] Publish: /a-1/3
1546282855.102790 INFO: [examples.FullSyncApp] Update /b-0/3
  • Sample output from node b:
1546282730.758296 INFO: [examples.FullSyncApp] Publish: /b-1/1
1546282741.144027 INFO: [examples.FullSyncApp] Update /a-1/1
1546282749.376543 INFO: [examples.FullSyncApp] Update /a-0/1
1546282750.262244 INFO: [examples.FullSyncApp] Publish: /b-0/1
1546282765.296005 INFO: [examples.FullSyncApp] Publish: /b-1/2
1546282783.778769 INFO: [examples.FullSyncApp] Update /a-0/2
1546282794.566485 INFO: [examples.FullSyncApp] Update /a-0/3
1546282795.374339 INFO: [examples.FullSyncApp] Update /a-1/2
1546282803.838394 INFO: [examples.FullSyncApp] Publish: /b-0/2
1546282804.033214 INFO: [examples.FullSyncApp] Publish: /b-1/3
1546282845.274680 INFO: [examples.FullSyncApp] Update /a-1/3
1546282855.101780 INFO: [examples.FullSyncApp] Publish: /b-0/3