simplified zipkin with ssl

.gitignore

@@ -13,3 +13,11 @@ testsetup/
 # nix
 env
 /dshackle-cli/node_modules/
+
+# temp files
+/test*
+/test/
+Test*.kt
+
+# http-client config
+http-client.env.json

build.gradle

@@ -94,7 +94,7 @@ dependencies {
     implementation libs.bundles.jackson
 
     implementation libs.bundles.apache.commons
-    implementation libs.bouncycastle
+    implementation libs.bundles.bouncycastle
     implementation libs.caffeine
     implementation libs.javax.annotations
 

gradle/libs.versions.toml

@@ -24,7 +24,8 @@ logstash-encoder = "net.logstash.logback:logstash-logback-encoder:7.2"
 
 janino = "org.codehaus.janino:janino:3.1.9"
 
-bouncycastle = "org.bouncycastle:bcprov-jdk15on:1.61"
+bouncycastle-prov = "org.bouncycastle:bcprov-jdk15on:1.61"
+bouncycastle-pkix = 'org.bouncycastle:bcpkix-jdk15on:1.61'
 
 caffeine = "com.github.ben-manes.caffeine:caffeine:2.8.5"
 
@@ -135,6 +136,7 @@ reactor = ["reactor-core", "reactor-netty", "reactor-extra", "reactor-kotlin"]
 spring-framework = ["spring-boot-starter", "spring-security-core", "spring-security-web", "spring-security-config"]
 testcontainers = ["testcontainers", "testcontainers-ganache"]
 junit = ["junit-jupiter", "assertj"]
+bouncycastle = ["bouncycastle-pkix", "bouncycastle-prov"]
 
 
 [plugins]

src/main/kotlin/io/emeraldpay/dshackle/config/context/TraceConfiguration.kt

@@ -2,12 +2,13 @@ package io.emeraldpay.dshackle.config.context
 
 import brave.grpc.GrpcTracing
 import brave.rpc.RpcTracing
+import brave.sampler.Sampler
 import io.grpc.ServerInterceptor
 import org.springframework.context.annotation.Bean
 import org.springframework.context.annotation.Configuration
 
 @Configuration
-open class TraceGrpcConfiguration {
+open class TraceConfiguration {
 
     @Bean
     open fun grpcTracing(rpcTracing: RpcTracing): GrpcTracing = GrpcTracing.create(rpcTracing)
@@ -15,4 +16,7 @@ open class TraceGrpcConfiguration {
     @Bean
     open fun grpcServerBraveInterceptor(grpcTracing: GrpcTracing): ServerInterceptor =
         grpcTracing.newServerInterceptor()
+
+    @Bean
+    open fun defaultSampler(): Sampler = Sampler.ALWAYS_SAMPLE
 }

src/main/kotlin/io/emeraldpay/dshackle/config/spans/ClientSpansInterceptor.kt

@@ -1,62 +0,0 @@
-package io.emeraldpay.dshackle.config.spans
-
-import brave.Tracer
-import brave.handler.MutableSpan
-import brave.handler.SpanHandler
-import com.fasterxml.jackson.databind.ObjectMapper
-import com.fasterxml.jackson.module.kotlin.readValue
-import io.grpc.CallOptions
-import io.grpc.Channel
-import io.grpc.ClientCall
-import io.grpc.ClientInterceptor
-import io.grpc.ForwardingClientCall.SimpleForwardingClientCall
-import io.grpc.ForwardingClientCallListener
-import io.grpc.Metadata
-import io.grpc.Metadata.ASCII_STRING_MARSHALLER
-import io.grpc.MethodDescriptor
-import org.springframework.beans.factory.annotation.Qualifier
-
-class ClientSpansInterceptor(
-    private val zipkinSpanHandler: SpanHandler,
-    private val tracer: Tracer,
-    @Qualifier("spanMapper")
-    private val spanMapper: ObjectMapper
-) : ClientInterceptor {
-
-    override fun <ReqT : Any?, RespT : Any?> interceptCall(
-        method: MethodDescriptor<ReqT, RespT>,
-        callOptions: CallOptions,
-        next: Channel
-    ): ClientCall<ReqT, RespT> {
-        return if (method.fullMethodName == "emerald.Blockchain/NativeCall") {
-            SpanClientCall(next.newCall(method, callOptions))
-        } else {
-            next.newCall(method, callOptions)
-        }
-    }
-
-    private inner class SpanClientCall<ReqT, RespT>(
-        delegate: ClientCall<ReqT, RespT>?
-    ) : SimpleForwardingClientCall<ReqT, RespT>(delegate) {
-        override fun start(responseListener: Listener<RespT>, headers: Metadata) {
-            val spanResponseListener = SpanClientCallListener(responseListener)
-            super.start(spanResponseListener, headers)
-        }
-    }
-
-    private inner class SpanClientCallListener<RespT>(
-        delegate: ClientCall.Listener<RespT>,
-    ) : ForwardingClientCallListener.SimpleForwardingClientCallListener<RespT>(delegate) {
-        override fun onHeaders(headers: Metadata) {
-            headers[Metadata.Key.of(SPAN_HEADER, ASCII_STRING_MARSHALLER)]
-                ?.takeIf { it.isNotBlank() }
-                ?.let {
-                    val spansFromProvider = spanMapper.readValue<List<MutableSpan>>(it)
-                    spansFromProvider.forEach { span ->
-                        zipkinSpanHandler.end(tracer.currentSpan().context(), span, SpanHandler.Cause.FINISHED)
-                    }
-                }
-            super.onHeaders(headers)
-        }
-    }
-}

src/main/kotlin/io/emeraldpay/dshackle/config/spans/ProviderSpanHandler.kt

@@ -3,78 +3,48 @@ package io.emeraldpay.dshackle.config.spans
 import brave.handler.MutableSpan
 import brave.handler.SpanHandler
 import brave.propagation.TraceContext
-import com.fasterxml.jackson.databind.ObjectMapper
-import com.github.benmanes.caffeine.cache.Caffeine
-import org.springframework.beans.factory.annotation.Qualifier
-import org.springframework.cloud.sleuth.Span
-import java.time.Duration
+import org.springframework.beans.factory.annotation.Value
+import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty
+import org.springframework.stereotype.Component
+import java.util.concurrent.TimeUnit
 
+@Component
+@ConditionalOnProperty(value = ["spring.zipkin.enabled"], havingValue = "true")
 class ProviderSpanHandler(
-    @Qualifier("spanMapper")
-    private val spanMapper: ObjectMapper,
-    private val spanExportableList: List<SpanExportable>
+    @Value("\${spans.collect.collect-only-errors:false}")
+    private val onlyErrors: Boolean? = false,
+    @Value("\${spans.collect.long-span-threshold}")
+    private val longSpanThreshold: Long? = null
 ) : SpanHandler() {
-    private val spans = Caffeine
-        .newBuilder()
-        .expireAfterWrite(Duration.ofMinutes(5))
-        .build<String, MutableList<MutableSpan>>()
 
-    override fun end(context: TraceContext, span: MutableSpan, cause: Cause): Boolean {
-        if (span.traceId().length > 20 && span.parentId() != null) {
-            val spanList = spans.asMap().computeIfAbsent(span.parentId()) { mutableListOf() }
-            spanList.add(span)
+    override fun end(context: TraceContext?, span: MutableSpan, cause: Cause?): Boolean {
+        val duration = TimeUnit.MILLISECONDS.convert(span.finishTimestamp() - span.startTimestamp(), TimeUnit.MICROSECONDS)
+
+        val isError = span.tags().containsKey("error")
+
+        // If onlyErrors is true and there is an error, return true.
+        if (onlyErrors == true && isError) {
+            return true
         }
-        return super.end(context, span, cause)
-    }
 
-    fun getErrorSpans(spanId: String, currentSpan: Span): String {
-        val spansInfo = SpansInfo()
+        // If onlyErrors is true, there is no error, and the span is long, return true.
+        if (onlyErrors == true && !isError && longSpanThreshold != null && duration >= longSpanThreshold) {
+            return true
+        }
 
-        enrichErrorSpans(spanId, spansInfo)
-        currentSpan.end()
-        currentSpan.context().parentId()?.let {
-            spans.getIfPresent(it)?.let { mutableSpans ->
-                if (mutableSpans.isNotEmpty()) {
-                    processSpanInfo(mutableSpans[0], spansInfo)
-                }
+        // If onlyErrors is false, check for the time threshold condition.
+        if (onlyErrors == false) {
+            // If longSpanThreshold is null, return true.
+            if (longSpanThreshold == null) {
+                return true
+            }
+            // If longSpanThreshold is set, only return true if the duration is >= time threshold.
+            else if (duration >= longSpanThreshold) {
+                return true
             }
         }
 
-        spansInfo.spans
-            .map { it.parentId() }
-            .forEach {
-                if (it != null) {
-                    spans.invalidate(it)
-                }
-            }
-
-        return if (spansInfo.exportable) {
-            spanMapper.writeValueAsString(spansInfo.spans)
-        } else {
-            ""
-        }
+        // Return false if none of the above conditions are met.
+        return false
     }
-
-    private fun enrichErrorSpans(spanId: String, spansInfo: SpansInfo) {
-        val currentSpans: List<MutableSpan>? = spans.getIfPresent(spanId)
-
-        currentSpans?.forEach {
-            processSpanInfo(it, spansInfo)
-            if (spanId != it.id()) {
-                enrichErrorSpans(it.id(), spansInfo)
-            }
-        }
-    }
-
-    private fun processSpanInfo(span: MutableSpan, spansInfo: SpansInfo) {
-        spansInfo.spans.add(span)
-        if (spanExportableList.any { it.isExportable(span) }) {
-            spansInfo.exportable = true
-        }
-    }
-
-    private data class SpansInfo(
-        var exportable: Boolean = false,
-        val spans: MutableList<MutableSpan> = mutableListOf()
-    )
 }

src/main/kotlin/io/emeraldpay/dshackle/config/spans/ServerSpansInterceptor.kt

@@ -1,44 +0,0 @@
-package io.emeraldpay.dshackle.config.spans
-
-import io.grpc.ForwardingServerCall.SimpleForwardingServerCall
-import io.grpc.Metadata
-import io.grpc.ServerCall
-import io.grpc.ServerCallHandler
-import io.grpc.ServerInterceptor
-import org.springframework.cloud.sleuth.Tracer
-
-class ServerSpansInterceptor(
-    private val tracer: Tracer,
-    private val providerSpanHandler: ProviderSpanHandler
-) : ServerInterceptor {
-    override fun <ReqT : Any?, RespT : Any?> interceptCall(
-        call: ServerCall<ReqT, RespT>,
-        headers: Metadata,
-        next: ServerCallHandler<ReqT, RespT>
-    ): ServerCall.Listener<ReqT> {
-        val serverCall = if (call.methodDescriptor.fullMethodName == "emerald.Blockchain/NativeCall") {
-            SpanServerCall(call)
-        } else {
-            call
-        }
-
-        return next.startCall(serverCall, headers)
-    }
-
-    private inner class SpanServerCall<ReqT, RespT>(
-        private val call: ServerCall<ReqT, RespT>
-    ) : SimpleForwardingServerCall<ReqT, RespT>(call) {
-        override fun sendHeaders(headers: Metadata) {
-            tracer.currentSpan()?.let {
-                val parentId = it.context().parentId()
-                if (parentId != null) {
-                    val spans = providerSpanHandler.getErrorSpans(it.context().spanId(), it)
-                    if (spans.isNotBlank()) {
-                        headers.put(Metadata.Key.of(SPAN_HEADER, Metadata.ASCII_STRING_MARSHALLER), spans)
-                    }
-                }
-                call.sendHeaders(headers)
-            }
-        }
-    }
-}

src/main/kotlin/io/emeraldpay/dshackle/config/spans/SpanConfig.kt

@@ -1,69 +0,0 @@
-package io.emeraldpay.dshackle.config.spans
-
-import brave.Tracer
-import brave.handler.SpanHandler
-import com.fasterxml.jackson.annotation.JsonAutoDetect
-import com.fasterxml.jackson.annotation.JsonInclude
-import com.fasterxml.jackson.databind.DeserializationFeature
-import com.fasterxml.jackson.databind.ObjectMapper
-import io.grpc.ClientInterceptor
-import io.grpc.ServerInterceptor
-import org.springframework.beans.factory.annotation.Qualifier
-import org.springframework.boot.autoconfigure.condition.ConditionalOnBean
-import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty
-import org.springframework.context.annotation.Bean
-import org.springframework.context.annotation.Configuration
-
-const val SPAN_HEADER = "spans"
-
-@Configuration
-@ConditionalOnProperty(value = ["spans.collect.enabled"], havingValue = "true")
-open class SpanConfig {
-
-    @Bean
-    open fun spanMapper(): ObjectMapper =
-        ObjectMapper()
-            .apply {
-                setSerializationInclusion(JsonInclude.Include.NON_DEFAULT)
-                configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false)
-                setVisibility(
-                    this.serializationConfig.defaultVisibilityChecker
-                        .withFieldVisibility(JsonAutoDetect.Visibility.ANY)
-                        .withGetterVisibility(JsonAutoDetect.Visibility.NONE)
-                        .withSetterVisibility(JsonAutoDetect.Visibility.NONE)
-                        .withCreatorVisibility(JsonAutoDetect.Visibility.NONE)
-                )
-            }
-
-    @Configuration
-    @ConditionalOnBean(SpanConfig::class)
-    @ConditionalOnProperty(value = ["spans.collect.main.enabled"], havingValue = "true")
-    open class MainSpanConfig {
-        @Bean
-        open fun clientSpansInterceptor(
-            zipkinSpanHandler: SpanHandler,
-            tracer: Tracer,
-            @Qualifier("spanMapper")
-            spanMapper: ObjectMapper
-        ): ClientInterceptor = ClientSpansInterceptor(zipkinSpanHandler, tracer, spanMapper)
-    }
-
-    @Configuration
-    @ConditionalOnBean(SpanConfig::class)
-    @ConditionalOnProperty(value = ["spans.collect.provider.enabled"], havingValue = "true")
-    open class ProviderSpanConfig {
-
-        @Bean
-        open fun errorSpanHandler(
-            @Qualifier("spanMapper")
-            spanMapper: ObjectMapper,
-            spanExportableList: List<SpanExportable>
-        ): ProviderSpanHandler = ProviderSpanHandler(spanMapper, spanExportableList)
-
-        @Bean
-        open fun serverSpansInterceptor(
-            tracer: org.springframework.cloud.sleuth.Tracer,
-            providerSpanHandler: ProviderSpanHandler
-        ): ServerInterceptor = ServerSpansInterceptor(tracer, providerSpanHandler)
-    }
-}

src/main/kotlin/io/emeraldpay/dshackle/config/spans/ZipkinSSLCustomizer.kt

@@ -0,0 +1,90 @@
+package io.emeraldpay.dshackle.config.spans
+
+import io.emeraldpay.dshackle.config.MainConfig
+import org.apache.http.conn.ssl.SSLConnectionSocketFactory
+import org.apache.http.impl.client.HttpClients
+import org.bouncycastle.openssl.PEMParser
+import org.springframework.cloud.sleuth.zipkin2.ZipkinRestTemplateCustomizer
+import org.springframework.http.HttpRequest
+import org.springframework.http.client.ClientHttpRequestExecution
+import org.springframework.http.client.ClientHttpRequestInterceptor
+import org.springframework.http.client.ClientHttpResponse
+import org.springframework.http.client.HttpComponentsClientHttpRequestFactory
+import org.springframework.stereotype.Component
+import org.springframework.web.client.RestTemplate
+import java.io.ByteArrayOutputStream
+import java.io.StringReader
+import java.nio.file.Files
+import java.nio.file.Paths
+import java.security.KeyFactory
+import java.security.KeyStore
+import java.security.SecureRandom
+import java.security.cert.CertificateFactory
+import java.security.cert.X509Certificate
+import java.security.spec.PKCS8EncodedKeySpec
+import java.util.zip.GZIPOutputStream
+import javax.net.ssl.KeyManagerFactory
+import javax.net.ssl.SSLContext
+
+@Component
+class ZipkinSSLCustomizer(private val mainConfig: MainConfig) : ZipkinRestTemplateCustomizer {
+    override fun customizeTemplate(restTemplate: RestTemplate): RestTemplate {
+        return if (mainConfig.tls?.enabled == true) {
+            setupSSL(mainConfig.tls!!.certificate!!, mainConfig.tls!!.key!!)
+        } else {
+            restTemplate
+        }.apply {
+            interceptors.add(0, GZipInterceptor())
+        }
+    }
+
+    private fun setupSSL(certPath: String, privateKeyPath: String): RestTemplate {
+        // Load the certificate
+        val certificateReader = StringReader(Files.readString(Paths.get(certPath)))
+        val pemObject = PEMParser(certificateReader).readPemObject()
+        val certificate = CertificateFactory.getInstance("X.509").generateCertificate(pemObject.content.inputStream()) as X509Certificate
+        // Load the private key
+        val privateKeyReader = StringReader(Files.readString(Paths.get(privateKeyPath)))
+        val pemKeyPair = PEMParser(privateKeyReader).readPemObject()
+        val privKeySpec = PKCS8EncodedKeySpec(pemKeyPair.content)
+        val privateKey = KeyFactory.getInstance("RSA").generatePrivate(privKeySpec)
+
+        // Create the key store
+        val keyStore = KeyStore.getInstance(KeyStore.getDefaultType()).apply {
+            load(null, null)
+            setCertificateEntry("certificate", certificate)
+            setKeyEntry("private-key", privateKey, null, arrayOf(certificate))
+        }
+
+        // Create the SSL context
+        val keyManagerFactory = KeyManagerFactory.getInstance(KeyManagerFactory.getDefaultAlgorithm()).apply {
+            init(keyStore, null)
+        }
+        val sslContext = SSLContext.getInstance("TLS").apply {
+            init(keyManagerFactory.keyManagers, null, SecureRandom())
+        }
+
+        // Create the HTTP client
+        val socketFactory = SSLConnectionSocketFactory(sslContext)
+        val httpClient = HttpClients.custom().setSSLSocketFactory(socketFactory).build()
+
+        // Create the request factory
+        val requestFactory = HttpComponentsClientHttpRequestFactory(httpClient)
+
+        // Create the RestTemplate
+        return RestTemplate(requestFactory)
+    }
+
+    private class GZipInterceptor : ClientHttpRequestInterceptor {
+        override fun intercept(
+            request: HttpRequest,
+            body: ByteArray,
+            execution: ClientHttpRequestExecution
+        ): ClientHttpResponse {
+            request.headers.add("Content-Encoding", "gzip")
+            val gzipped = ByteArrayOutputStream()
+            GZIPOutputStream(gzipped).use { compressor -> compressor.write(body) }
+            return execution.execute(request, gzipped.toByteArray())
+        }
+    }
+}

src/main/kotlin/io/emeraldpay/dshackle/config/spans/export.kt

@@ -1,34 +0,0 @@
-package io.emeraldpay.dshackle.config.spans
-
-import brave.handler.MutableSpan
-import io.emeraldpay.dshackle.commons.SPAN_ERROR
-import io.emeraldpay.dshackle.commons.SPAN_NO_RESPONSE_MESSAGE
-import org.springframework.beans.factory.annotation.Value
-import org.springframework.stereotype.Component
-import java.util.concurrent.TimeUnit
-
-interface SpanExportable {
-    fun isExportable(span: MutableSpan): Boolean
-}
-
-@Component
-class ErrorSpanExportable : SpanExportable {
-    override fun isExportable(span: MutableSpan): Boolean = span.tags().containsKey(SPAN_ERROR)
-}
-
-@Component
-class NoResponseSpanExportable : SpanExportable {
-    override fun isExportable(span: MutableSpan): Boolean = span.tags().containsKey(SPAN_NO_RESPONSE_MESSAGE)
-}
-
-@Component
-class LongResponseSpanExportable(
-    @Value("\${spans.collect.provider.long-span-threshold}")
-    private val longSpanThreshold: Long? = null
-) : SpanExportable {
-
-    override fun isExportable(span: MutableSpan): Boolean {
-        val duration = span.finishTimestamp() - span.startTimestamp()
-        return TimeUnit.SECONDS.convert(duration, TimeUnit.MICROSECONDS) >= longSpanThreshold!!
-    }
-}

src/main/resources/application.yml

@@ -3,8 +3,8 @@ spring:
     max-metadata-size: ${MAX_METADATA_SIZE:16384}
     name: ${DRPC_APP_NAME:dshackle}
   zipkin:
-    enabled: ${ZIPKIN_ENABLE:false}
-    base-url: ${ZIPKIN_URL:http://localhost:9411/}
+    enabled: ${ENABLE_COLLECT_SPANS:false}
+    base-url: ${ZIPKIN_URL:https://trace.drpc.dev/}
   sleuth:
     span-filter:
       additional-span-name-patterns-to-ignore:
@@ -16,12 +16,9 @@ spring:
         - ".+SubscribeStatus"
         - ".+SubscribeNodeStatus"
         - ".+Describe"
+        - ".+ServerReflectionInfo"
 
 spans:
   collect:
-    enabled: ${ENABLE_COLLECT_SPANS:false}
-    provider:
-      enabled: ${ENABLE_PROVIDER_COLLECT_SPANS:true}
-      long-span-threshold: ${LONG_SPAN_THRESHOLD:1}
-    main:
-      enabled: ${ENABLE_MAIN_COLLECT_SPANS:false}
+    long-span-threshold: ${LONG_SPAN_THRESHOLD:1000}
+    collect-only-errors: ${ONLY_ERROR_SPANS:true}

src/test/kotlin/io/emeraldpay/dshackle/config/spans/CollectSpanConfigTest.kt

@@ -1,138 +0,0 @@
-package io.emeraldpay.dshackle.config.spans
-
-import brave.handler.SpanHandler
-import org.junit.jupiter.api.Assertions.assertThrows
-import org.junit.jupiter.api.Test
-import org.junit.jupiter.api.assertDoesNotThrow
-import org.junit.jupiter.api.extension.ExtendWith
-import org.mockito.Mockito.mock
-import org.springframework.beans.factory.NoSuchBeanDefinitionException
-import org.springframework.beans.factory.annotation.Autowired
-import org.springframework.boot.test.context.TestConfiguration
-import org.springframework.cloud.sleuth.Tracer
-import org.springframework.context.ApplicationContext
-import org.springframework.context.annotation.Bean
-import org.springframework.test.context.ContextConfiguration
-import org.springframework.test.context.TestPropertySource
-import org.springframework.test.context.junit.jupiter.SpringExtension
-
-class CollectSpanConfigTest {
-
-    @ContextConfiguration(
-        classes = [SpanConfig::class],
-    )
-    @ExtendWith(SpringExtension::class)
-    @TestPropertySource(
-        properties = [
-            "spans.collect.enabled=false"
-        ]
-    )
-    class SpanConfigTest {
-        @Autowired
-        private lateinit var appCtx: ApplicationContext
-
-        @Test
-        fun testSpanConfig() {
-            assertThrows(NoSuchBeanDefinitionException::class.java) {
-                appCtx.getBean(SpanConfig::class.java)
-            }
-            assertThrows(NoSuchBeanDefinitionException::class.java) {
-                appCtx.getBean(ProviderSpanHandler::class.java)
-            }
-            assertThrows(NoSuchBeanDefinitionException::class.java) {
-                appCtx.getBean(ServerSpansInterceptor::class.java)
-            }
-            assertThrows(NoSuchBeanDefinitionException::class.java) {
-                appCtx.getBean(ClientSpansInterceptor::class.java)
-            }
-            assertThrows(NoSuchBeanDefinitionException::class.java) {
-                appCtx.getBean("spanMapper")
-            }
-        }
-    }
-
-    @ContextConfiguration(
-        classes = [SpanConfig::class, SpanProviderConfigTest.Config::class],
-    )
-    @ExtendWith(SpringExtension::class)
-    @TestPropertySource(
-        properties = [
-            "spans.collect.enabled=true",
-            "spans.collect.provider.enabled=true",
-            "spans.collect.main.enabled=false"
-        ]
-    )
-    class SpanProviderConfigTest {
-        @Autowired
-        private lateinit var appCtx: ApplicationContext
-
-        @Test
-        fun testSpanProviderConfig() {
-            assertDoesNotThrow {
-                appCtx.getBean(SpanConfig::class.java)
-            }
-            assertDoesNotThrow {
-                appCtx.getBean(ProviderSpanHandler::class.java)
-            }
-            assertDoesNotThrow {
-                appCtx.getBean(ServerSpansInterceptor::class.java)
-            }
-            assertThrows(NoSuchBeanDefinitionException::class.java) {
-                appCtx.getBean(ClientSpansInterceptor::class.java)
-            }
-            assertDoesNotThrow {
-                appCtx.getBean("spanMapper")
-            }
-        }
-
-        @TestConfiguration
-        open class Config {
-            @Bean
-            open fun tracer(): Tracer = mock(Tracer::class.java)
-        }
-    }
-
-    @ContextConfiguration(
-        classes = [SpanConfig::class, SpanMainConfigTest.Config::class],
-    )
-    @ExtendWith(SpringExtension::class)
-    @TestPropertySource(
-        properties = [
-            "spans.collect.enabled=true",
-            "spans.collect.provider.enabled=false",
-            "spans.collect.main.enabled=true"
-        ]
-    )
-    class SpanMainConfigTest {
-        @Autowired
-        private lateinit var appCtx: ApplicationContext
-
-        @Test
-        fun testSpanMainConfig() {
-            assertDoesNotThrow {
-                appCtx.getBean(SpanConfig::class.java)
-            }
-            assertThrows(NoSuchBeanDefinitionException::class.java) {
-                appCtx.getBean(ProviderSpanHandler::class.java)
-            }
-            assertThrows(NoSuchBeanDefinitionException::class.java) {
-                appCtx.getBean(ServerSpansInterceptor::class.java)
-            }
-            assertDoesNotThrow {
-                appCtx.getBean(ClientSpansInterceptor::class.java)
-            }
-            assertDoesNotThrow {
-                appCtx.getBean("spanMapper")
-            }
-        }
-
-        @TestConfiguration
-        open class Config {
-            @Bean
-            open fun tracer(): brave.Tracer = mock(brave.Tracer::class.java)
-
-            @Bean
-            open fun zipkinSpanHandler(): SpanHandler = mock(SpanHandler::class.java)
-        }
-    }
-}

src/test/kotlin/io/emeraldpay/dshackle/config/spans/ProviderSpanHandlerTest.kt

@@ -1,128 +1,85 @@
 package io.emeraldpay.dshackle.config.spans
 
 import brave.handler.MutableSpan
-import brave.handler.SpanHandler
-import brave.propagation.TraceContext
-import com.fasterxml.jackson.module.kotlin.readValue
-import io.emeraldpay.dshackle.commons.SPAN_ERROR
-import io.emeraldpay.dshackle.commons.SPAN_NO_RESPONSE_MESSAGE
 import org.junit.jupiter.api.Assertions.assertEquals
-import org.junit.jupiter.api.Assertions.assertTrue
-import org.junit.jupiter.api.Test
 import org.junit.jupiter.params.ParameterizedTest
+import org.junit.jupiter.params.provider.Arguments
 import org.junit.jupiter.params.provider.MethodSource
-import org.mockito.Mockito
-import org.mockito.Mockito.`when`
-import org.springframework.cloud.sleuth.Span
-import org.springframework.cloud.sleuth.brave.bridge.BraveTraceContext
+import java.util.stream.Stream
 
 class ProviderSpanHandlerTest {
-    private val mapper = SpanConfig().spanMapper()
-    private val spanExportableList = listOf(
-        ErrorSpanExportable(), NoResponseSpanExportable(), LongResponseSpanExportable(10)
-    )
-    private val ctx = TraceContext.newBuilder()
-        .traceId(1223324)
-        .spanId(234235)
-        .build()
-
-    @Test
-    fun `span with length of traceId less than 20 is not collected`() {
-        val spanId = "f7e83f2b69ec684d"
-        val currentSpan = Mockito.mock(Span::class.java)
-        val handler = spanHandler()
-
-        `when`(currentSpan.context()).thenReturn(BraveTraceContext(ctx))
-
-        handler.end(ctx, span("f7e83f2b69ec684d", spanId), SpanHandler.Cause.FINISHED)
-
-        val result = handler.getErrorSpans(spanId, currentSpan)
-        assertEquals("", result)
-    }
-
-    @Test
-    fun `span without parenId is not collected`() {
-        val spanId = "f7e83f2b69ec684d"
-        val currentSpan = Mockito.mock(Span::class.java)
-        val handler = spanHandler()
-
-        `when`(currentSpan.context()).thenReturn(BraveTraceContext(ctx))
-
-        handler.end(ctx, span("6666632728347823749827349723985", spanId), SpanHandler.Cause.FINISHED)
-
-        val result = handler.getErrorSpans(spanId, currentSpan)
-        assertEquals("", result)
-    }
-
-    @ParameterizedTest
-    @MethodSource("spans")
-    fun `span with length of traceId greater than 20 and with parentId is collected`(span: MutableSpan) {
-        val currentSpan = Mockito.mock(Span::class.java)
-        val handler = spanHandler()
-
-        `when`(currentSpan.context()).thenReturn(BraveTraceContext(ctx))
-
-        handler.end(ctx, span, SpanHandler.Cause.FINISHED)
-
-        val result = handler.getErrorSpans("f7e83f2b69ec682d", currentSpan)
-        val collectedSpans = mapper.readValue<List<MutableSpan>>(result)
-        assertTrue(collectedSpans.size == 1)
-        assertEquals(span, collectedSpans[0])
-    }
-
-    @Test
-    fun `span without error tag is not collected`() {
-        val spanId = "f7e83f2b69ec684d"
-        val currentSpan = Mockito.mock(Span::class.java)
-        val handler = spanHandler()
-        val span = span("6666632728347823749827349723985", spanId)
-            .apply {
-                parentId("f7e83f2b69ec682d")
-                removeTag(SPAN_ERROR)
-            }
-
-        `when`(currentSpan.context()).thenReturn(BraveTraceContext(ctx))
-
-        handler.end(ctx, span, SpanHandler.Cause.FINISHED)
-
-        val result = handler.getErrorSpans("f7e83f2b69ec682d", currentSpan)
-        assertEquals("", result)
-    }
-
-    private fun span(traceId: String, spanId: String) = MutableSpan()
-        .apply {
-            traceId(traceId)
-            id(spanId)
-            tag(SPAN_ERROR, "true")
-        }
 
     companion object {
         @JvmStatic
-        fun spans() = listOf(
-            MutableSpan()
-                .apply {
-                    traceId("6666632728347823749827349723985")
-                    id("f7e83f2b69ec682d")
-                    tag(SPAN_ERROR, "true")
-                    parentId("f7e83f2b69ec682d")
-                },
-            MutableSpan()
-                .apply {
-                    traceId("6666632728347823749827349723985")
-                    id("f7e83f2b69ec111d")
-                    parentId("f7e83f2b69ec682d")
-                    tag(SPAN_NO_RESPONSE_MESSAGE, "noResp")
-                },
-            MutableSpan()
-                .apply {
-                    traceId("6666632728347823749827349723985")
-                    id("f7e83f2b69ec111d")
-                    parentId("f7e83f2b69ec682d")
-                    startTimestamp(3034272)
-                    finishTimestamp(15034272)
-                }
-        )
+        fun data(): Stream<Arguments> {
+            return Stream.of(
+                Arguments.of(
+                    false, null,
+                    MutableSpan().apply {
+                        startTimestamp(0)
+                        finishTimestamp(1000000)
+                    },
+                    true
+                ),
+                Arguments.of(
+                    false, 1000L,
+                    MutableSpan().apply {
+                        startTimestamp(0)
+                        finishTimestamp(999999)
+                    },
+                    false
+                ),
+                Arguments.of(
+                    false, 1000L,
+                    MutableSpan().apply {
+                        startTimestamp(0)
+                        finishTimestamp(1000000)
+                    },
+                    true
+                ),
+                Arguments.of(
+                    true, null,
+                    MutableSpan().apply {
+                        startTimestamp(0)
+                        finishTimestamp(1000000)
+                    },
+                    false
+                ),
+                Arguments.of(
+                    true, null,
+                    MutableSpan().apply {
+                        startTimestamp(0)
+                        finishTimestamp(1000000)
+                        tag("error", "true")
+                    },
+                    true
+                ),
+                Arguments.of(
+                    false, null,
+                    MutableSpan().apply {
+                        startTimestamp(0)
+                        finishTimestamp(1000000)
+                        tag("error", "true")
+                    },
+                    true
+                ),
+                Arguments.of(
+                    true, 1000L,
+                    MutableSpan().apply {
+                        startTimestamp(0)
+                        finishTimestamp(1000000)
+                    },
+                    true
+                ),
+            )
+        }
     }
 
-    private fun spanHandler() = ProviderSpanHandler(mapper, spanExportableList)
+    @ParameterizedTest
+    @MethodSource("data")
+    fun end(onlyErrors: Boolean?, timeThreshold: Long?, span: MutableSpan, expected: Boolean) {
+        val handler = ProviderSpanHandler(onlyErrors, timeThreshold)
+        val res = handler.end(null, span, null)
+        assertEquals(expected, res)
+    }
 }