public void StreamTaskWrittingCheckpoint()
{
var config = new StreamConfig <StringSerDes, StringSerDes>();
config.ApplicationId = "test-app";
config.StateDir = Path.Combine(".", Guid.NewGuid().ToString());
var serdes = new StringSerDes();
var builder = new StreamBuilder();
var table = builder.Table("topic", RocksDb <string, string> .As("store").WithLoggingEnabled());
TaskId id = new TaskId {
Id = 0, Partition = 0
};
var topology = builder.Build();
topology.Builder.RewriteTopology(config);
var processorTopology = topology.Builder.BuildTopology(id);
var supplier = new SyncKafkaSupplier();
var producer = supplier.GetProducer(config.ToProducerConfig());
var consumer = supplier.GetConsumer(config.ToConsumerConfig(), null);
var part = new TopicPartition("topic", 0);
StreamTask task = new StreamTask(
"thread-0",
id,
new List <TopicPartition> {
part
},
processorTopology,
consumer,
config,
supplier,
producer,
new MockChangelogRegister()
, new StreamMetricsRegistry());
task.GroupMetadata = consumer as SyncConsumer;
task.InitializeStateStores();
task.InitializeTopology();
task.RestorationIfNeeded();
task.CompleteRestoration();
List <ConsumeResult <byte[], byte[]> > messages = new List <ConsumeResult <byte[], byte[]> >();
int offset = 0;
for (int i = 0; i < 5; ++i)
{
messages.Add(
new ConsumeResult <byte[], byte[]>
{
Message = new Message <byte[], byte[]>
{
Key = serdes.Serialize($"key{i + 1}", new SerializationContext()),
Value = serdes.Serialize($"value{i + 1}", new SerializationContext())
},
TopicPartitionOffset = new TopicPartitionOffset(part, offset++)
});
}
task.AddRecords(messages);
Assert.IsTrue(task.CanProcess(DateTime.Now.GetMilliseconds()));
while (task.CanProcess(DateTime.Now.GetMilliseconds()))
{
Assert.IsTrue(task.Process());
Assert.IsTrue(task.CommitNeeded);
task.Commit();
}
task.MayWriteCheckpoint(true);
messages = new List <ConsumeResult <byte[], byte[]> >();
for (int i = 0; i < StateManagerTools.OFFSET_DELTA_THRESHOLD_FOR_CHECKPOINT + 10; ++i)
{
messages.Add(
new ConsumeResult <byte[], byte[]>
{
Message = new Message <byte[], byte[]>
{
Key = serdes.Serialize($"key{i + 1}", new SerializationContext()),
Value = serdes.Serialize($"value{i + 1}", new SerializationContext())
},
TopicPartitionOffset = new TopicPartitionOffset(part, offset++)
});
}
task.AddRecords(messages);
while (task.CanProcess(DateTime.Now.GetMilliseconds()))
{
Assert.IsTrue(task.Process());
}
task.MayWriteCheckpoint(false);
var lines = File.ReadAllLines(Path.Combine(config.StateDir, config.ApplicationId, "0-0", ".checkpoint"));
Assert.AreEqual(3, lines.Length);
Assert.AreEqual("test-app-store-changelog 0 10014", lines[2]);
task.Suspend();
task.Close();
Directory.Delete(config.StateDir, true);
}