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53 changes: 53 additions & 0 deletions
53
...rc/main/scala/com/wavesplatform/dex/grpc/integration/tool/RestartableManagedChannel.scala
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,53 @@ | ||
| package com.wavesplatform.dex.grpc.integration.tool | ||
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| import io.grpc.ManagedChannel | ||
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| import java.util.concurrent.TimeUnit | ||
| import scala.concurrent.duration.Duration | ||
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| final class RestartableManagedChannel(mkManagedChannel: () => ManagedChannel) { | ||
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| private var channel: ManagedChannel = _ | ||
| private var isClosed: Boolean = false | ||
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| def stop(): Unit = synchronized { | ||
| checkIsClosed() | ||
| if (channel != null) { | ||
| channel.shutdown() | ||
| channel = null | ||
| } | ||
| } | ||
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| def restart(): Unit = synchronized { | ||
| checkIsClosed() | ||
| if (channel != null) | ||
| channel.shutdown() | ||
| channel = mkManagedChannel() | ||
| } | ||
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| def getChannel: ManagedChannel = synchronized { | ||
| checkIsClosed() | ||
| if (channel == null) | ||
| channel = mkManagedChannel() | ||
| channel | ||
| } | ||
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| def shutdown(awaitTime: Duration): Unit = synchronized { | ||
| mkClosed() | ||
| if (channel != null) { | ||
| channel.shutdown() | ||
| channel.awaitTermination(awaitTime.toMillis, TimeUnit.MILLISECONDS) | ||
| channel = null | ||
| } | ||
| } | ||
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| private def checkIsClosed(): Unit = | ||
| if (isClosed) | ||
| throw new RuntimeException("managed channel is closed") | ||
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| private def mkClosed(): Unit = { | ||
| checkIsClosed() | ||
| isClosed = true | ||
| } | ||
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| } |
80 changes: 80 additions & 0 deletions
80
...st/scala/com/wavesplatform/dex/grpc/integration/tool/RestartableManagedChannelSuite.scala
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,80 @@ | ||
| package com.wavesplatform.dex.grpc.integration.tool | ||
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| import com.wavesplatform.dex.WavesIntegrationSuiteBase | ||
| import io.grpc.ManagedChannel | ||
| import org.scalamock.scalatest.MockFactory | ||
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| import java.util.concurrent.TimeUnit | ||
| import scala.concurrent.duration._ | ||
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| class RestartableManagedChannelSuite extends WavesIntegrationSuiteBase with MockFactory { | ||
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| "RestartableManagedChannel should" - { | ||
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| "getChannel" in { | ||
| val channel = mock[ManagedChannel] | ||
| val maker = mockFunction[ManagedChannel] | ||
| maker.expects().returning(channel).once() | ||
| val restartableManagedChannel = new RestartableManagedChannel(maker) | ||
| restartableManagedChannel.getChannel shouldBe channel | ||
| } | ||
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| "shutdown" in testShutdown { (awaitTime, restartableManagedChannel) => | ||
| restartableManagedChannel.shutdown(awaitTime) | ||
| } | ||
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| "not do any ops after shutting down" in testShutdown { (awaitTime, restartableManagedChannel) => | ||
| restartableManagedChannel.shutdown(awaitTime) | ||
| intercept[RuntimeException](restartableManagedChannel.restart()) | ||
| intercept[RuntimeException](restartableManagedChannel.getChannel) | ||
| intercept[RuntimeException](restartableManagedChannel.shutdown(awaitTime)) | ||
| } | ||
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| "restart without triggering getChannel" in { | ||
| val channel = mock[ManagedChannel] | ||
| val maker = mockFunction[ManagedChannel] | ||
| maker.expects().returning(channel).once() | ||
| val restartableManagedChannel = new RestartableManagedChannel(maker) | ||
| restartableManagedChannel.restart() | ||
| restartableManagedChannel.getChannel shouldBe channel | ||
| } | ||
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| "restart" in { | ||
| val channel1 = mock[ManagedChannel] | ||
| val channel2 = mock[ManagedChannel] | ||
| val maker = mockFunction[ManagedChannel] | ||
| maker.expects().returning(channel1).once() | ||
| maker.expects().returning(channel2).once() | ||
| (channel1.shutdown _).expects().returning(channel1).once() | ||
| val restartableManagedChannel = new RestartableManagedChannel(maker) | ||
| restartableManagedChannel.getChannel //force channel creation | ||
| restartableManagedChannel.restart() | ||
| } | ||
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| "stop current channel" in { | ||
| val channel = mock[ManagedChannel] | ||
| (channel.shutdown _).expects().returning(channel).once() | ||
| val maker = mockFunction[ManagedChannel] | ||
| maker.expects().returning(channel).once() | ||
| val restartableManagedChannel = new RestartableManagedChannel(maker) | ||
| restartableManagedChannel.getChannel //force channel creation | ||
| restartableManagedChannel.stop() | ||
| } | ||
| } | ||
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| private def testShutdown(f: (Duration, RestartableManagedChannel) => Unit): Unit = { | ||
| val awaitTime = 10.seconds | ||
| val channel = mock[ManagedChannel] | ||
| (channel.shutdown _).expects().returning(channel).once() | ||
| (channel.awaitTermination(_: Long, _: TimeUnit)) | ||
| .expects(awaitTime.toMillis, TimeUnit.MILLISECONDS) | ||
| .returning(true) | ||
| .once() | ||
| val maker = mockFunction[ManagedChannel] | ||
| maker.expects().returning(channel).once() | ||
| val restartableManagedChannel = new RestartableManagedChannel(maker) | ||
| restartableManagedChannel.getChannel //force channel creation | ||
| f(awaitTime, restartableManagedChannel) | ||
| } | ||
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| } |