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solution: stream updates to blockchain status

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This commit is contained in:
Igor Artamonov
2019-07-26 22:29:19 -04:00
parent 7467e19ea0
commit 64e0ac58fd
9 changed files with 143 additions and 12 deletions
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22
src/main/kotlin/io/emeraldpay/dshackle/rpc/SubscribeStatus.kt
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@@ -1,10 +1,14 @@
package io.emeraldpay.dshackle.rpc
import io.emeraldpay.api.proto.BlockchainOuterClass
import io.emeraldpay.api.proto.Common
import io.emeraldpay.dshackle.upstream.UpstreamAvailability
import io.emeraldpay.dshackle.upstream.Upstreams
import io.grpc.StatusRuntimeException
import io.grpc.stub.StreamObserver
import org.springframework.beans.factory.annotation.Autowired
import org.springframework.stereotype.Service
import reactor.core.Disposable
@Service
class SubscribeStatus(
@@ -13,6 +17,24 @@ class SubscribeStatus(
fun subscribeStatus(request: BlockchainOuterClass.StatusRequest, responseObserver: StreamObserver<BlockchainOuterClass.ChainStatus>) {
upstreams.getAvailable().forEach { chain ->
var d: Disposable? = null
d = upstreams.getUpstream(chain)?.observeStatus()?.subscribe { availability ->
val chainStatus = BlockchainOuterClass.ChainStatus.newBuilder()
.setChain(Common.ChainRef.forNumber(chain.id))
.setAvailable(availability == UpstreamAvailability.OK)
.setQuorum(0)
if (availability == UpstreamAvailability.OK) {
upstreams.getUpstream(chain)?.getOptions()?.let { opts ->
chainStatus.setQuorum(opts.quorum)
}
}
try {
responseObserver.onNext(chainStatus.build())
} catch (e: StatusRuntimeException) {
// gRPC channel was closed
d?.dispose()
}
}
}
}

55
src/main/kotlin/io/emeraldpay/dshackle/upstream/AggregatedUpstreams.kt
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@@ -1,12 +1,44 @@
package io.emeraldpay.dshackle.upstream
abstract class AggregatedUpstreams {
import io.emeraldpay.dshackle.config.UpstreamsConfig
import reactor.core.publisher.Flux
import java.time.Duration
import java.time.Instant
import java.util.concurrent.atomic.AtomicReference
import java.util.function.Predicate
abstract class AggregatedUpstreams: Upstream {
abstract fun getAll(): List<Upstream>
abstract fun addUpstream(upstream: Upstream)
abstract fun getApis(quorum: Int): Iterator<EthereumApi>
abstract fun getApi(): EthereumApi
abstract fun getHead(): EthereumHead
override fun observeStatus(): Flux<UpstreamAvailability> {
val upstreamsFluxes = getAll().map { up -> up.observeStatus().map { UpstreamStatus(up, it) } }
return Flux.merge(upstreamsFluxes)
.filter(FilterBestAvailability())
.map { it.status }
}
override fun isAvailable(): Boolean {
return getAll().any { it.isAvailable() }
}
override fun getStatus(): UpstreamAvailability {
val upstreams = getAll()
return if (upstreams.isEmpty()) UpstreamAvailability.UNAVAILABLE
else upstreams.map { it.getStatus() }.min()!!
}
override fun getOptions(): UpstreamsConfig.Options {
val options = UpstreamsConfig.Options()
options.quorum = getAll().filter {
it.getStatus() == UpstreamAvailability.OK
}.sumBy {
it.getOptions().quorum
}
return options
}
class SingleApi(
private val quorumApi: QuorumApi
@@ -47,6 +79,23 @@ abstract class AggregatedUpstreams {
}
throw IllegalStateException("No upstream API available")
}
}
class UpstreamStatus(val upstream: Upstream, val status: UpstreamAvailability, val ts: Instant = Instant.now())
class FilterBestAvailability(): Predicate<UpstreamStatus> {
private val lastRef = AtomicReference<UpstreamStatus>()
override fun test(t: UpstreamStatus): Boolean {
val last = lastRef.get()
val changed = last == null
|| t.status > last.status
|| (last.upstream == t.upstream && t.status != last.status)
|| last.ts.isBefore(Instant.now() - Duration.ofSeconds(60))
if (changed) {
lastRef.set(t)
}
return changed
}
}
}

7
src/main/kotlin/io/emeraldpay/dshackle/upstream/ChainUpstreams.kt
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@@ -1,5 +1,6 @@
package io.emeraldpay.dshackle.upstream
import io.emeraldpay.dshackle.config.UpstreamsConfig
import io.emeraldpay.grpc.Chain
import org.slf4j.LoggerFactory
import java.io.Closeable
@@ -57,9 +58,9 @@ class ChainUpstreams (
}
fun printStatus() {
var height: Long = -1
var height: Long? = null
try {
height = head!!.getHead().block(Duration.ofSeconds(1))?.number ?: -1
height = head!!.getHead().block(Duration.ofSeconds(1))?.number
} catch (e: IllegalStateException) {
//timout
} catch (e: Exception) {
@@ -70,7 +71,7 @@ class ChainUpstreams (
.map { "${it.key.name}/${it.value.size}" }
.joinToString(",")
log.info("State of ${chain.chainCode}: height=$height, status=$statuses")
log.info("State of ${chain.chainCode}: height=${height ?: '?'}, status=$statuses")
}

2
src/main/kotlin/io/emeraldpay/dshackle/upstream/EthereumGrpcTransport.kt
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@@ -16,6 +16,7 @@ import reactor.core.publisher.Mono
import reactor.core.publisher.toFlux
import reactor.util.function.Tuple3
import reactor.util.function.Tuples
import java.time.Duration
import java.util.concurrent.CompletableFuture
import java.util.function.Function
@@ -97,6 +98,7 @@ class EthereumGrpcTransport(
bi.onError(RpcException(-32603, "RPC response not received"))
}
}
.timeout(Duration.ofSeconds(15))
.toFuture()
}
}

10
src/main/kotlin/io/emeraldpay/dshackle/upstream/EthereumUpstream.kt
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@@ -2,7 +2,11 @@ package io.emeraldpay.dshackle.upstream
import io.emeraldpay.dshackle.config.UpstreamsConfig
import io.emeraldpay.grpc.Chain
import io.infinitape.etherjar.domain.TransactionId
import io.infinitape.etherjar.rpc.json.BlockJson
import org.slf4j.LoggerFactory
import reactor.core.publisher.Flux
import reactor.core.publisher.TopicProcessor
import java.util.concurrent.atomic.AtomicReference
class EthereumUpstream(
@@ -24,6 +28,7 @@ class EthereumUpstream(
private val validator = UpstreamValidator(this, options)
private val status = AtomicReference(UpstreamAvailability.UNAVAILABLE)
private val statusStream: TopicProcessor<UpstreamAvailability> = TopicProcessor.create()
init {
log.info("Configured for ${chain.chainName}")
@@ -31,6 +36,7 @@ class EthereumUpstream(
validator.start()
.subscribe {
status.set(it)
statusStream.onNext(it)
}
}
@@ -42,6 +48,10 @@ class EthereumUpstream(
return status.get()
}
override fun observeStatus(): Flux<UpstreamAvailability> {
return Flux.from(statusStream)
}
override fun getHead(): EthereumHead {
return head
}

17
src/main/kotlin/io/emeraldpay/dshackle/upstream/GrpcUpstream.kt
View File

@@ -38,6 +38,7 @@ open class GrpcUpstream(
private var status = AtomicReference<UpstreamAvailability>(UpstreamAvailability.UNAVAILABLE)
private val head = Head(this)
private val api: EthereumApi
private val statusStream: TopicProcessor<UpstreamAvailability> = TopicProcessor.create()
init {
val grpcTransport = EthereumGrpcTransport(chain, client, objectMapper)
@@ -52,7 +53,7 @@ open class GrpcUpstream(
.toMono()
val retry: Function<Flux<BlockchainOuterClass.ChainHead>, Flux<BlockchainOuterClass.ChainHead>> = Function {
status.set(UpstreamAvailability.UNAVAILABLE)
setStatus(UpstreamAvailability.UNAVAILABLE)
client.subscribeHead(chainRef)
}
@@ -80,14 +81,14 @@ open class GrpcUpstream(
log.debug("New block ${block.number} on ${chain}")
headBlock.set(block)
streamBlocks.onNext(block)
status.set(UpstreamAvailability.OK)
setStatus(UpstreamAvailability.OK)
}
}
fun init(conf: BlockchainOuterClass.DescribeChain) {
val available = conf.available
val quorum = conf.quorum
status.set(
setStatus(
if (available && quorum > 0) UpstreamAvailability.OK else UpstreamAvailability.UNAVAILABLE
)
}
@@ -95,11 +96,15 @@ open class GrpcUpstream(
fun onStatus(value: BlockchainOuterClass.ChainStatus) {
val available = value.available
val quorum = value.quorum
status.set(
setStatus(
if (available && quorum > 0) UpstreamAvailability.OK else UpstreamAvailability.UNAVAILABLE
)
}
private fun setStatus(value: UpstreamAvailability) {
status.set(value)
statusStream.onNext(value)
}
// ------------------------------------------------------------------------------------------
@@ -111,6 +116,10 @@ open class GrpcUpstream(
return status.get()
}
override fun observeStatus(): Flux<UpstreamAvailability> {
return Flux.from(statusStream)
}
override fun getHead(): EthereumHead {
return head
}

2
src/main/kotlin/io/emeraldpay/dshackle/upstream/Upstream.kt
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@@ -1,10 +1,12 @@
package io.emeraldpay.dshackle.upstream
import io.emeraldpay.dshackle.config.UpstreamsConfig
import reactor.core.publisher.Flux
interface Upstream {
fun isAvailable(): Boolean
fun getStatus(): UpstreamAvailability
fun observeStatus(): Flux<UpstreamAvailability>
fun getHead(): EthereumHead
fun getApi(): EthereumApi
fun getOptions(): UpstreamsConfig.Options