diff --git a/README.md b/README.md
index f7b6146..a7e65ef 100644
--- a/README.md
+++ b/README.md
@@ -7,4 +7,5 @@
- 🛠️ [Kotlin Multiplatform](kmp/README.md)
- 🌐 [Kotlin-Js Interop](kotlin-js-interop/README.md)
- ⚙️ [Ktor Framework](ktor/README.md)
+- 🔄 [Ktor Retry Plugin](ktor-retry-plugin/README.md)
- 🛡️ [Resilience4j](resilience4j/README.md)
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index 5f1fbae..5742b1b 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -12,8 +12,11 @@ compose-compiler = "1.5.4"
compose-material3 = "1.2.1"
androidx-activityCompose = "1.8.2"
kotlinx-serialization = "1.6.3"
-junit = "5.9.3"
+junit = "4.13.2"
+junit-jupiter = "5.9.3"
resilience4j = "2.2.0"
+logback = "1.5.3"
+hamcrest = "2.2"
[libraries]
# kotlin
@@ -45,23 +48,33 @@ ktor-client-core = { module = "io.ktor:ktor-client-core", version.ref = "ktor" }
ktor-client-js = { module = "io.ktor:ktor-client-js", version.ref = "ktor" }
ktor-client-android = { module = "io.ktor:ktor-client-android", version.ref = "ktor" }
ktor-client-websockets = { module = "io.ktor:ktor-client-websockets", version.ref = "ktor" }
+ktor-client-cio = { module = "io.ktor:ktor-client-cio", version.ref = "ktor" }
+ktor-client-logging = { module = "io.ktor:ktor-client-logging", version.ref = "ktor" }
ktor-bom = { module = "io.ktor:ktor-bom", version.ref = "ktor" }
+ktor-server-core = { module = "io.ktor:ktor-server-core", version.ref = "ktor" }
ktor-server-netty = { module = "io.ktor:ktor-server-netty", version.ref = "ktor" }
ktor-server-websockets = { module = "io.ktor:ktor-server-websockets", version.ref = "ktor" }
+ktor-server-cio = { module = "io.ktor:ktor-server-cio", version.ref = "ktor" }
ktor-server-calllogging = { module = "io.ktor:ktor-server-call-logging", version.ref = "ktor" }
ktor-server-defaultheaders = { module = "io.ktor:ktor-server-default-headers", version.ref = "ktor" }
ktor-server-sessions = { module = "io.ktor:ktor-server-sessions", version.ref = "ktor" }
ktor-server-statuspages = { module = "io.ktor:ktor-server-status-pages", version.ref = "ktor" }
-ktor-server-test-host = { module = "io.ktor:ktor-server-test-host", version.ref = "ktor" }
+ktor-server-testhost = { module = "io.ktor:ktor-server-test-host", version.ref = "ktor" }
+ktor-server-hostcommon = { module = "io.ktor:ktor-server-host-common", version.ref = "ktor" }
# Resilience4j
resilience4j-retry = { module = "io.github.resilience4j:resilience4j-retry", version.ref = "resilience4j" }
resilience4j-kotlin = { module = "io.github.resilience4j:resilience4j-kotlin", version.ref = "resilience4j" }
+# junit
+junit = { module = "junit:junit", version.ref = "junit" }
+junit-jupiter-engine = { module = "org.junit.jupiter:junit-jupiter-engine", version.ref = "junit-jupiter" }
+
# others
+logback-classic = { module = "ch.qos.logback:logback-classic", version.ref = "logback" }
nexus-publish = { module = "io.github.gradle-nexus.publish-plugin:io.github.gradle-nexus.publish-plugin.gradle.plugin", version.ref = "nexus-publish" }
mockito-core = { module = "org.mockito:mockito-core", version.ref = "mockito" }
-junit-jupiter-engine = { module = "org.junit.jupiter:junit-jupiter-engine", version.ref = "junit" }
+hamcrest = { module = "org.hamcrest:hamcrest", version.ref = "hamcrest" }
[plugins]
androidLibrary = { id = "com.android.library", version.ref = "agp" }
@@ -71,4 +84,4 @@ kotlinMultiplatform = { id = "org.jetbrains.kotlin.multiplatform", version.ref =
kotlinAndroid = { id = "org.jetbrains.kotlin.android", version.ref = "kotlin" }
kotlinxSerialization = { id = "org.jetbrains.kotlin.plugin.serialization", version.ref = "kotlin" }
-# original toml taken from: https://github.com/ktorio/ktor-documentation/blob/2.3.9/codeSnippets/snippets/tutorial-client-kmm/gradle/libs.versions.toml
\ No newline at end of file
+# original toml taken from: https://github.com/ktorio/ktor-documentation/blob/2.3.9/codeSnippets/snippets/tutorial-client-kmm/gradle/libs.versions.toml
diff --git a/ktor-retry-plugin/README.md b/ktor-retry-plugin/README.md
new file mode 100644
index 0000000..ffcb228
--- /dev/null
+++ b/ktor-retry-plugin/README.md
@@ -0,0 +1,78 @@
+# Ktor Retry Plugin
+
+### Install
+
+The `HttpRequestRetry` plugin can be installed using the `install` function
+and configured using its **last parameter function**
+(_trailing lambda_), as with other Ktor plugins.
+
+The plugin is part of the `ktor-client-core` module.
+
+### Configuration
+
+| Property | Description |
+|----------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
+| `maxRetries` | The maximum number of retries | |
+| `retryIf` | A lambda that returns `true` if the request should be retried on specific request details and or responses. |
+| `retryOnExceptionIf` | A lambda that returns `true` if the request should be retried on specific request details and or exceptions that occurred. |
+| `delayMillis` | A lambda that returns the delay in milliseconds before the next retry. Some methods are provided to create more complex delays, such as `exponentialDelay()` or `constantDelay()`. |
+
+> [!NOTE]
+> The plugin also provides more specific methods to retry for
+> (e.g., on server errors, for example, `retryOnServerErrors()` retries on server 5xx errors).
+
+Example:
+
+```kotlin
+val client = HttpClient(CIO) {
+ install(HttpRequestRetry) {
+ maxRetries = 5
+ retryIf { request, response ->
+ !response.status.isSuccess()
+ }
+ retryOnExceptionIf { request, cause ->
+ cause is NetworkError
+ }
+ delayMillis { retry ->
+ retry * 3000L
+ } // retries in 3, 6, 9, etc. seconds
+ }
+ // other configurations
+}
+```
+
+Default configuration:
+
+```kotlin
+install(HttpRequestRetry) {
+ retryOnExceptionOrServerErrors(3)
+ exponentialDelay()
+}
+```
+
+### Changing a Request Before Retry
+
+It is possible to modify the request
+before retrying it by using the `modifyRequest` method inside the configuration block of the plugin.
+This method receives a lambda that takes the request and returns the modified request.
+One usage example is to add a header with the current retry count:
+
+```kotlin
+val client = HttpClient(CIO) {
+ install(HttpRequestRetry) {
+ modifyRequest { request ->
+ request.headers.append("x-retry-count", retryCount.toString())
+ }
+ }
+ // other configurations
+}
+```
+
+> [!IMPORTANT]
+> To preserve configuration context between retry attempts, the plugin uses request attibutes to store data.
+> If those are altered, the plugin may not work as expected.
+>
+> If an attribute is not present in the request, the plugin will use the default configuration associated with that attribute.
+> Such behaviour can be seen in the source code:
+> - [after applying configuration](https://github.com/ktorio/ktor/blob/7c76fa7c0f2b7dcc6e0445da8612d75bb5d11609/ktor-client/ktor-client-core/common/src/io/ktor/client/plugins/HttpRequestRetry.kt#L366-L373)
+> - [before each retry attempt](https://github.com/ktorio/ktor/blob/7c76fa7c0f2b7dcc6e0445da8612d75bb5d11609/ktor-client/ktor-client-core/common/src/io/ktor/client/plugins/HttpRequestRetry.kt#L267-L274)
diff --git a/ktor-retry-plugin/client-retry/README.md b/ktor-retry-plugin/client-retry/README.md
new file mode 100644
index 0000000..f267abc
--- /dev/null
+++ b/ktor-retry-plugin/client-retry/README.md
@@ -0,0 +1,18 @@
+# Client Retry
+
+A sample Ktor project showing how to use the [HttpRequestRetry](https://ktor.io/docs/client-retry.html) plugin.
+
+## Running
+
+This client sample uses the server from the [simulate-slow-server](../simulate-slow-server) example.
+The server sample has the `/error` route that returns the `200 OK` response from the third attempt only.
+
+To see `HttpRequestRetry` in action, run this example by executing the following command:
+
+```bash
+./gradlew :client-retry:run
+```
+
+The client will send three consequent requests automatically to get a success response from the server.
+
+> Note that this example uses the [Logging](https://ktor.io/docs/client-logging.html) plugin to show all requests in a console.
diff --git a/ktor-retry-plugin/client-retry/build.gradle.kts b/ktor-retry-plugin/client-retry/build.gradle.kts
new file mode 100644
index 0000000..31a1756
--- /dev/null
+++ b/ktor-retry-plugin/client-retry/build.gradle.kts
@@ -0,0 +1,27 @@
+plugins {
+ application
+ alias(libs.plugins.kotlinJvm)
+}
+
+application {
+ mainClass.set("application.ApplicationKt")
+}
+
+repositories {
+ mavenCentral()
+ maven { url = uri("https://maven.pkg.jetbrains.space/public/p/ktor/eap") }
+}
+
+dependencies {
+ implementation(libs.ktor.client.core)
+ implementation(libs.ktor.client.cio)
+ implementation(libs.ktor.client.logging)
+ implementation(libs.ktor.server.core)
+ implementation(libs.ktor.server.cio)
+ implementation(libs.ktor.server.hostcommon)
+ implementation(libs.logback.classic)
+ implementation(project(":simulate-slow-server"))
+ implementation(project(":end-to-end-utilities"))
+ testImplementation(libs.junit)
+ testImplementation(libs.hamcrest)
+}
diff --git a/ktor-retry-plugin/client-retry/src/main/kotlin/application/Application.kt b/ktor-retry-plugin/client-retry/src/main/kotlin/application/Application.kt
new file mode 100644
index 0000000..035a08c
--- /dev/null
+++ b/ktor-retry-plugin/client-retry/src/main/kotlin/application/Application.kt
@@ -0,0 +1,28 @@
+package application
+
+import e2e.*
+import io.ktor.client.*
+import io.ktor.client.engine.cio.*
+import io.ktor.client.plugins.*
+import io.ktor.client.plugins.logging.*
+import io.ktor.client.request.*
+import io.ktor.client.statement.*
+import io.ktor.server.application.*
+import kotlinx.coroutines.*
+import slowserver.main
+
+fun main() {
+ defaultServer(Application::main).start()
+ runBlocking {
+ val client = HttpClient(CIO) {
+ install(HttpRequestRetry) {
+ retryOnServerErrors(maxRetries = 5)
+ exponentialDelay()
+ }
+ install(Logging) { level = LogLevel.INFO }
+ }
+
+ val response: HttpResponse = client.get("http://0.0.0.0:8080/error")
+ println(response.bodyAsText())
+ }
+}
diff --git a/ktor-retry-plugin/client-retry/src/test/kotlin/application/ApplicationTest.kt b/ktor-retry-plugin/client-retry/src/test/kotlin/application/ApplicationTest.kt
new file mode 100644
index 0000000..ef2dd76
--- /dev/null
+++ b/ktor-retry-plugin/client-retry/src/test/kotlin/application/ApplicationTest.kt
@@ -0,0 +1,44 @@
+package application
+
+import e2e.readString
+import e2e.runGradleAppWaiting
+import kotlinx.coroutines.runBlocking
+import org.junit.*
+import org.junit.Assert.*
+import java.io.File
+
+class ApplicationTest {
+
+ companion object {
+ private const val GRADLEW_WINDOWS = "gradlew.bat"
+ private const val GRADLEW_UNIX = "gradlew"
+
+ @JvmStatic
+ fun findGradleWrapper(): String {
+ val currentDir = File(System.getProperty("user.dir"))
+ val parentDir = currentDir.parent ?: error("Cannot find parent directory of $currentDir")
+ val gradlewName = if (System.getProperty("os.name").startsWith("Windows")) {
+ GRADLEW_WINDOWS
+ } else {
+ GRADLEW_UNIX
+ }
+ val gradlewFile = File(parentDir, gradlewName)
+ check(gradlewFile.exists()) { "Gradle Wrapper not found at ${gradlewFile.absolutePath}" }
+ return gradlewFile.absolutePath
+ }
+ }
+
+ @Before
+ fun setup() {
+ System.setProperty("gradlew", findGradleWrapper())
+ }
+
+ @Test
+ fun outputContainsAllResponses() = runBlocking {
+ runGradleAppWaiting().inputStream.readString().let { outputString ->
+ assertTrue(outputString.contains("RESPONSE: 500 Internal Server Error"))
+ assertTrue(outputString.contains("RESPONSE: 200 OK"))
+ assertTrue(outputString.contains("Server is back online!"))
+ }
+ }
+}
diff --git a/ktor-retry-plugin/end-to-end-utilities/README.md b/ktor-retry-plugin/end-to-end-utilities/README.md
new file mode 100644
index 0000000..f902153
--- /dev/null
+++ b/ktor-retry-plugin/end-to-end-utilities/README.md
@@ -0,0 +1,3 @@
+# End-to-end utilities
+
+This project isn't runnable and contains helper classes and functions for testing samples from this repository.
diff --git a/ktor-retry-plugin/end-to-end-utilities/build.gradle.kts b/ktor-retry-plugin/end-to-end-utilities/build.gradle.kts
new file mode 100644
index 0000000..fd875eb
--- /dev/null
+++ b/ktor-retry-plugin/end-to-end-utilities/build.gradle.kts
@@ -0,0 +1,13 @@
+plugins {
+ alias(libs.plugins.kotlinJvm)
+}
+
+repositories {
+ mavenCentral()
+ maven { url = uri("https://maven.pkg.jetbrains.space/public/p/ktor/eap") }
+}
+
+dependencies {
+ implementation(libs.ktor.server.core)
+ implementation(libs.ktor.server.cio)
+}
diff --git a/ktor-retry-plugin/end-to-end-utilities/src/main/kotlin/e2e/defaultServer.kt b/ktor-retry-plugin/end-to-end-utilities/src/main/kotlin/e2e/defaultServer.kt
new file mode 100644
index 0000000..013f5e4
--- /dev/null
+++ b/ktor-retry-plugin/end-to-end-utilities/src/main/kotlin/e2e/defaultServer.kt
@@ -0,0 +1,16 @@
+package e2e
+
+import io.ktor.server.application.*
+import io.ktor.server.cio.*
+import io.ktor.server.engine.*
+import org.slf4j.helpers.NOPLogger
+
+fun defaultServer(module: Application.() -> Unit) = embeddedServer(CIO, environment = applicationEngineEnvironment {
+ log = NOPLogger.NOP_LOGGER
+
+ connector {
+ port = 8080
+ }
+
+ module(module)
+})
diff --git a/ktor-retry-plugin/end-to-end-utilities/src/main/kotlin/e2e/gradleProcess.kt b/ktor-retry-plugin/end-to-end-utilities/src/main/kotlin/e2e/gradleProcess.kt
new file mode 100644
index 0000000..804c069
--- /dev/null
+++ b/ktor-retry-plugin/end-to-end-utilities/src/main/kotlin/e2e/gradleProcess.kt
@@ -0,0 +1,21 @@
+package e2e
+
+import java.io.InputStream
+
+fun runGradleAppWaiting(): Process = runGradleWaiting("run")
+fun runGradleApp(): Process = runGradle("run")
+
+fun runGradleWaiting(vararg args: String): Process {
+ val process = runGradle(*args)
+ process.waitFor()
+ return process
+}
+
+fun runGradle(vararg args: String): Process {
+ val gradlewPath =
+ System.getProperty("gradlew") ?: error("System property 'gradlew' should point to Gradle Wrapper file")
+ val processArgs = listOf(gradlewPath, "-Dorg.gradle.logging.level=quiet", "--quiet") + args
+ return ProcessBuilder(processArgs).start()
+}
+
+fun InputStream.readString(): String = readAllBytes().toString(Charsets.UTF_8)
diff --git a/ktor-retry-plugin/gradle/wrapper/gradle-wrapper.jar b/ktor-retry-plugin/gradle/wrapper/gradle-wrapper.jar
new file mode 100644
index 0000000..7f93135
Binary files /dev/null and b/ktor-retry-plugin/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/ktor-retry-plugin/gradle/wrapper/gradle-wrapper.properties b/ktor-retry-plugin/gradle/wrapper/gradle-wrapper.properties
new file mode 100644
index 0000000..3fa8f86
--- /dev/null
+++ b/ktor-retry-plugin/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,7 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.4-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
diff --git a/ktor-retry-plugin/gradlew b/ktor-retry-plugin/gradlew
new file mode 100644
index 0000000..1aa94a4
--- /dev/null
+++ b/ktor-retry-plugin/gradlew
@@ -0,0 +1,249 @@
+#!/bin/sh
+
+#
+# Copyright © 2015-2021 the original authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+##############################################################################
+#
+# Gradle start up script for POSIX generated by Gradle.
+#
+# Important for running:
+#
+# (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
+# noncompliant, but you have some other compliant shell such as ksh or
+# bash, then to run this script, type that shell name before the whole
+# command line, like:
+#
+# ksh Gradle
+#
+# Busybox and similar reduced shells will NOT work, because this script
+# requires all of these POSIX shell features:
+# * functions;
+# * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
+# «${var#prefix}», «${var%suffix}», and «$( cmd )»;
+# * compound commands having a testable exit status, especially «case»;
+# * various built-in commands including «command», «set», and «ulimit».
+#
+# Important for patching:
+#
+# (2) This script targets any POSIX shell, so it avoids extensions provided
+# by Bash, Ksh, etc; in particular arrays are avoided.
+#
+# The "traditional" practice of packing multiple parameters into a
+# space-separated string is a well documented source of bugs and security
+# problems, so this is (mostly) avoided, by progressively accumulating
+# options in "$@", and eventually passing that to Java.
+#
+# Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
+# and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
+# see the in-line comments for details.
+#
+# There are tweaks for specific operating systems such as AIX, CygWin,
+# Darwin, MinGW, and NonStop.
+#
+# (3) This script is generated from the Groovy template
+# https://github.com/gradle/gradle/blob/HEAD/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+# within the Gradle project.
+#
+# You can find Gradle at https://github.com/gradle/gradle/.
+#
+##############################################################################
+
+# Attempt to set APP_HOME
+
+# Resolve links: $0 may be a link
+app_path=$0
+
+# Need this for daisy-chained symlinks.
+while
+ APP_HOME=${app_path%"${app_path##*/}"} # leaves a trailing /; empty if no leading path
+ [ -h "$app_path" ]
+do
+ ls=$( ls -ld "$app_path" )
+ link=${ls#*' -> '}
+ case $link in #(
+ /*) app_path=$link ;; #(
+ *) app_path=$APP_HOME$link ;;
+ esac
+done
+
+# This is normally unused
+# shellcheck disable=SC2034
+APP_BASE_NAME=${0##*/}
+# Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036)
+APP_HOME=$( cd "${APP_HOME:-./}" > /dev/null && pwd -P ) || exit
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+ echo "$*"
+} >&2
+
+die () {
+ echo
+ echo "$*"
+ echo
+ exit 1
+} >&2
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "$( uname )" in #(
+ CYGWIN* ) cygwin=true ;; #(
+ Darwin* ) darwin=true ;; #(
+ MSYS* | MINGW* ) msys=true ;; #(
+ NONSTOP* ) nonstop=true ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+ if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+ # IBM's JDK on AIX uses strange locations for the executables
+ JAVACMD=$JAVA_HOME/jre/sh/java
+ else
+ JAVACMD=$JAVA_HOME/bin/java
+ fi
+ if [ ! -x "$JAVACMD" ] ; then
+ die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+ fi
+else
+ JAVACMD=java
+ if ! command -v java >/dev/null 2>&1
+ then
+ die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+ fi
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+ case $MAX_FD in #(
+ max*)
+ # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
+ # shellcheck disable=SC2039,SC3045
+ MAX_FD=$( ulimit -H -n ) ||
+ warn "Could not query maximum file descriptor limit"
+ esac
+ case $MAX_FD in #(
+ '' | soft) :;; #(
+ *)
+ # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
+ # shellcheck disable=SC2039,SC3045
+ ulimit -n "$MAX_FD" ||
+ warn "Could not set maximum file descriptor limit to $MAX_FD"
+ esac
+fi
+
+# Collect all arguments for the java command, stacking in reverse order:
+# * args from the command line
+# * the main class name
+# * -classpath
+# * -D...appname settings
+# * --module-path (only if needed)
+# * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if "$cygwin" || "$msys" ; then
+ APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+ CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
+
+ JAVACMD=$( cygpath --unix "$JAVACMD" )
+
+ # Now convert the arguments - kludge to limit ourselves to /bin/sh
+ for arg do
+ if
+ case $arg in #(
+ -*) false ;; # don't mess with options #(
+ /?*) t=${arg#/} t=/${t%%/*} # looks like a POSIX filepath
+ [ -e "$t" ] ;; #(
+ *) false ;;
+ esac
+ then
+ arg=$( cygpath --path --ignore --mixed "$arg" )
+ fi
+ # Roll the args list around exactly as many times as the number of
+ # args, so each arg winds up back in the position where it started, but
+ # possibly modified.
+ #
+ # NB: a `for` loop captures its iteration list before it begins, so
+ # changing the positional parameters here affects neither the number of
+ # iterations, nor the values presented in `arg`.
+ shift # remove old arg
+ set -- "$@" "$arg" # push replacement arg
+ done
+fi
+
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Collect all arguments for the java command:
+# * DEFAULT_JVM_OPTS, JAVA_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
+# and any embedded shellness will be escaped.
+# * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be
+# treated as '${Hostname}' itself on the command line.
+
+set -- \
+ "-Dorg.gradle.appname=$APP_BASE_NAME" \
+ -classpath "$CLASSPATH" \
+ org.gradle.wrapper.GradleWrapperMain \
+ "$@"
+
+# Stop when "xargs" is not available.
+if ! command -v xargs >/dev/null 2>&1
+then
+ die "xargs is not available"
+fi
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+# readarray ARGS < <( xargs -n1 <<<"$var" ) &&
+# set -- "${ARGS[@]}" "$@"
+#
+# but POSIX shell has neither arrays nor command substitution, so instead we
+# post-process each arg (as a line of input to sed) to backslash-escape any
+# character that might be a shell metacharacter, then use eval to reverse
+# that process (while maintaining the separation between arguments), and wrap
+# the whole thing up as a single "set" statement.
+#
+# This will of course break if any of these variables contains a newline or
+# an unmatched quote.
+#
+
+eval "set -- $(
+ printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
+ xargs -n1 |
+ sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
+ tr '\n' ' '
+ )" '"$@"'
+
+exec "$JAVACMD" "$@"
diff --git a/ktor-retry-plugin/gradlew.bat b/ktor-retry-plugin/gradlew.bat
new file mode 100644
index 0000000..93e3f59
--- /dev/null
+++ b/ktor-retry-plugin/gradlew.bat
@@ -0,0 +1,92 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%"=="" @echo off
+@rem ##########################################################################
+@rem
+@rem Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%"=="" set DIRNAME=.
+@rem This is normally unused
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if %ERRORLEVEL% equ 0 goto execute
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if %ERRORLEVEL% equ 0 goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+set EXIT_CODE=%ERRORLEVEL%
+if %EXIT_CODE% equ 0 set EXIT_CODE=1
+if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
+exit /b %EXIT_CODE%
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega
diff --git a/ktor-retry-plugin/settings.gradle.kts b/ktor-retry-plugin/settings.gradle.kts
new file mode 100644
index 0000000..45e616b
--- /dev/null
+++ b/ktor-retry-plugin/settings.gradle.kts
@@ -0,0 +1,28 @@
+pluginManagement {
+ repositories {
+ google()
+ mavenCentral()
+ gradlePluginPortal()
+ }
+}
+
+dependencyResolutionManagement {
+ dependencyResolutionManagement {
+ versionCatalogs {
+ create("libs") {
+ from(files("../gradle/libs.versions.toml"))
+ }
+ }
+ }
+ @Suppress("UnstableApiUsage")
+ repositories {
+ google()
+ mavenCentral()
+ }
+}
+
+rootProject.name = "ktor-retry-plugin"
+
+include(":client-retry")
+include(":simulate-slow-server")
+include(":end-to-end-utilities")
diff --git a/ktor-retry-plugin/simulate-slow-server/README.md b/ktor-retry-plugin/simulate-slow-server/README.md
new file mode 100644
index 0000000..11795da
--- /dev/null
+++ b/ktor-retry-plugin/simulate-slow-server/README.md
@@ -0,0 +1,11 @@
+# Slow Server
+
+An application simulating a slow server by creating a custom interceptor for Ktor.
+
+## Running
+
+Execute this command in the repository's root directory to run this sample:
+
+```bash
+./gradlew :simulate-slow-server:run
+```
diff --git a/ktor-retry-plugin/simulate-slow-server/build.gradle.kts b/ktor-retry-plugin/simulate-slow-server/build.gradle.kts
new file mode 100644
index 0000000..56a819d
--- /dev/null
+++ b/ktor-retry-plugin/simulate-slow-server/build.gradle.kts
@@ -0,0 +1,22 @@
+plugins {
+ application
+ alias(libs.plugins.kotlinJvm)
+}
+
+application {
+ mainClass.set("io.ktor.server.netty.EngineMain")
+}
+
+repositories {
+ mavenCentral()
+ maven { url = uri("https://maven.pkg.jetbrains.space/public/p/ktor/eap") }
+}
+
+dependencies {
+ implementation(libs.kotlin.stdlib.jdk8)
+ implementation(libs.ktor.server.netty)
+ implementation(libs.ktor.server.core)
+ implementation(libs.logback.classic)
+ testImplementation(libs.ktor.server.testhost)
+ testImplementation(libs.kotlin.test)
+}
diff --git a/ktor-retry-plugin/simulate-slow-server/src/main/kotlin/slowserver/Application.kt b/ktor-retry-plugin/simulate-slow-server/src/main/kotlin/slowserver/Application.kt
new file mode 100644
index 0000000..2acabc6
--- /dev/null
+++ b/ktor-retry-plugin/simulate-slow-server/src/main/kotlin/slowserver/Application.kt
@@ -0,0 +1,30 @@
+package slowserver
+
+import io.ktor.http.*
+import io.ktor.server.application.*
+import io.ktor.server.response.*
+import io.ktor.server.routing.*
+import kotlinx.coroutines.*
+import java.time.*
+
+fun Application.main() {
+ intercept(ApplicationCallPipeline.Plugins) {
+ delay(2000L)
+ }
+ routing {
+ get("/path1") {
+ call.respondText("Response time: ${LocalTime.now()}")
+ }
+ get("/path2") {
+ call.respondText("Response time: ${LocalTime.now()}")
+ }
+ var requestCount = 0
+ get("/error") {
+ requestCount += 1
+ when (requestCount) {
+ in 1..2 -> call.respondText("Server is down", status = HttpStatusCode.InternalServerError)
+ in 3..10 -> call.respondText("Server is back online!", status = HttpStatusCode.OK)
+ }
+ }
+ }
+}
diff --git a/ktor-retry-plugin/simulate-slow-server/src/main/resources/application.conf b/ktor-retry-plugin/simulate-slow-server/src/main/resources/application.conf
new file mode 100644
index 0000000..7cd7988
--- /dev/null
+++ b/ktor-retry-plugin/simulate-slow-server/src/main/resources/application.conf
@@ -0,0 +1,9 @@
+ktor {
+ deployment {
+ port = 8080
+ }
+
+ application {
+ modules = [ slowserver.ApplicationKt.main ]
+ }
+}
diff --git a/ktor-retry-plugin/simulate-slow-server/src/main/resources/logback.xml b/ktor-retry-plugin/simulate-slow-server/src/main/resources/logback.xml
new file mode 100644
index 0000000..bdbb64e
--- /dev/null
+++ b/ktor-retry-plugin/simulate-slow-server/src/main/resources/logback.xml
@@ -0,0 +1,12 @@
+
+
+
+ %d{YYYY-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n
+
+
+
+
+
+
+
+
diff --git a/ktor-retry-plugin/simulate-slow-server/src/test/kotlin/slowserver/ApplicationTest.kt b/ktor-retry-plugin/simulate-slow-server/src/test/kotlin/slowserver/ApplicationTest.kt
new file mode 100644
index 0000000..8552d77
--- /dev/null
+++ b/ktor-retry-plugin/simulate-slow-server/src/test/kotlin/slowserver/ApplicationTest.kt
@@ -0,0 +1,19 @@
+package slowserver
+
+import io.ktor.client.request.*
+import io.ktor.server.testing.*
+import java.time.Duration
+import java.time.LocalTime
+import kotlin.test.*
+
+class ApplicationTest {
+ @Test
+ fun testPath1() = testApplication {
+ val requestTime = LocalTime.now()
+ client.get("/path1")
+ val responseTime = LocalTime.now()
+ assertTrue {
+ Duration.between(requestTime, responseTime).toSeconds() >= 2
+ }
+ }
+}
diff --git a/ktor/gradle/wrapper/gradle-wrapper.jar b/ktor/gradle/wrapper/gradle-wrapper.jar
index 7f93135..e69de29 100644
Binary files a/ktor/gradle/wrapper/gradle-wrapper.jar and b/ktor/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/ktor/lib/build.gradle.kts b/ktor/lib/build.gradle.kts
index c0bb4d1..7279aac 100644
--- a/ktor/lib/build.gradle.kts
+++ b/ktor/lib/build.gradle.kts
@@ -63,7 +63,7 @@ kotlin {
val backendJvmTest by getting {
dependsOn(commonTest)
dependencies {
- implementation(libs.ktor.server.test.host)
+ implementation(libs.ktor.server.testhost)
implementation(libs.ktor.client.websockets)
}
}
diff --git a/resilience4j/build.gradle.kts b/resilience4j/build.gradle.kts
index d5fce72..e13b30e 100644
--- a/resilience4j/build.gradle.kts
+++ b/resilience4j/build.gradle.kts
@@ -5,7 +5,6 @@ plugins {
repositories {
// Use Maven Central for resolving dependencies.
mavenCentral()
-
}
dependencies {
@@ -19,4 +18,4 @@ dependencies {
tasks.named("test") {
useJUnitPlatform()
-}
\ No newline at end of file
+}