Roman Elizarov | 7b2d8b0 | 2017-02-02 20:09:14 +0300 | [diff] [blame] | 1 | package kotlinx.coroutines.experimental.channels |
| 2 | |
| 3 | import kotlinx.coroutines.experimental.* |
| 4 | import org.junit.Test |
| 5 | import org.junit.runner.RunWith |
| 6 | import org.junit.runners.Parameterized |
| 7 | import java.util.concurrent.ConcurrentHashMap |
| 8 | import java.util.concurrent.atomic.AtomicInteger |
Roman Elizarov | 12f961d | 2017-02-06 15:44:03 +0300 | [diff] [blame] | 9 | import org.junit.Assert.* |
Roman Elizarov | 7b2d8b0 | 2017-02-02 20:09:14 +0300 | [diff] [blame] | 10 | |
| 11 | @RunWith(Parameterized::class) |
| 12 | class ChannelSendReceiveStressTest( |
| 13 | val kind: TestChannelKind, |
| 14 | val nSenders: Int, |
| 15 | val nReceivers: Int |
| 16 | ) { |
| 17 | companion object { |
| 18 | @Parameterized.Parameters(name = "{0}, nSenders={1}, nReceivers={2}") |
| 19 | @JvmStatic |
| 20 | fun params(): Collection<Array<Any>> = |
| 21 | listOf(1, 2, 10).flatMap { nSenders -> |
| 22 | listOf(1, 6).flatMap { nReceivers -> |
| 23 | TestChannelKind.values().map { arrayOf<Any>(it, nSenders, nReceivers) } |
| 24 | } |
| 25 | } |
| 26 | } |
| 27 | |
| 28 | val nEvents = 1_000_000 |
| 29 | |
| 30 | val channel = kind.create() |
| 31 | val sendersCompleted = AtomicInteger() |
| 32 | val receiversCompleted = AtomicInteger() |
| 33 | val dupes = AtomicInteger() |
| 34 | val received = ConcurrentHashMap<Int,Int>() |
| 35 | val receivedBy = IntArray(nReceivers) |
| 36 | |
| 37 | @Test |
| 38 | fun testSendReceiveStress() = runBlocking { |
| 39 | val receivers = List(nReceivers) { receiverIndex -> |
| 40 | // different event receivers use different code |
| 41 | launch(CommonPool + CoroutineName("receiver$receiverIndex")) { |
| 42 | when (receiverIndex % 3) { |
| 43 | 0 -> doReceive(receiverIndex) |
| 44 | 1 -> doReceiveOrNull(receiverIndex) |
| 45 | 2 -> doIterator(receiverIndex) |
| 46 | } |
| 47 | receiversCompleted.incrementAndGet() |
| 48 | } |
| 49 | } |
| 50 | val senders = List(nSenders) { senderIndex -> |
| 51 | launch(CommonPool + CoroutineName("sender$senderIndex")) { |
| 52 | for (i in senderIndex until nEvents step nSenders) |
| 53 | channel.send(i) |
| 54 | sendersCompleted.incrementAndGet() |
| 55 | } |
| 56 | } |
| 57 | senders.forEach { it.join() } |
| 58 | channel.close() |
| 59 | receivers.forEach { it.join() } |
| 60 | println("Tested $kind with nSenders=$nSenders, nReceivers=$nReceivers") |
| 61 | println("Completed successfully ${sendersCompleted.get()} sender coroutines") |
| 62 | println("Completed successfully ${receiversCompleted.get()} receiver coroutines") |
| 63 | println(" Received ${received.size} events") |
| 64 | println(" Received dupes ${dupes.get()}") |
| 65 | repeat(nReceivers) { receiveIndex -> |
| 66 | println(" Received by #$receiveIndex ${receivedBy[receiveIndex]}") |
| 67 | } |
| 68 | assertEquals(nSenders, sendersCompleted.get()) |
| 69 | assertEquals(nReceivers, receiversCompleted.get()) |
| 70 | assertEquals(0, dupes.get()) |
| 71 | assertEquals(nEvents, received.size) |
| 72 | repeat(nReceivers) { receiveIndex -> |
Roman Elizarov | 12f961d | 2017-02-06 15:44:03 +0300 | [diff] [blame] | 73 | assertTrue("Each receiver should have received something", receivedBy[receiveIndex] > 0) |
Roman Elizarov | 7b2d8b0 | 2017-02-02 20:09:14 +0300 | [diff] [blame] | 74 | } |
| 75 | } |
| 76 | |
| 77 | private fun doReceived(receiverIndex: Int, event: Int) { |
| 78 | if (received.put(event, event) != null) { |
| 79 | println("Duplicate event $event") |
| 80 | dupes.incrementAndGet() |
| 81 | } |
| 82 | receivedBy[receiverIndex]++ |
| 83 | } |
| 84 | |
| 85 | private suspend fun doReceive(receiverIndex: Int) { |
| 86 | while (true) { |
| 87 | try { doReceived(receiverIndex, channel.receive()) } |
| 88 | catch (ex: ClosedReceiveChannelException) { break } |
| 89 | } |
| 90 | |
| 91 | } |
| 92 | |
| 93 | private suspend fun doReceiveOrNull(receiverIndex: Int) { |
| 94 | while (true) { |
| 95 | doReceived(receiverIndex, channel.receiveOrNull() ?: break) |
| 96 | } |
| 97 | } |
| 98 | |
| 99 | private suspend fun doIterator(receiverIndex: Int) { |
| 100 | for (event in channel) { |
| 101 | doReceived(receiverIndex, event) |
| 102 | } |
| 103 | } |
| 104 | } |