First commit

.fleet/run.json

@@ -0,0 +1,15 @@
+{
+    "configurations": [
+
+        {
+            "name": "test [run] (1)",
+            "type": "gradle",
+            "workingDir": "$PROJECT_DIR$",
+            "tasks": ["run"],
+            "args": [""],
+            "initScripts": {
+                "flmapper": "ext.mapPath = { path -> path }"
+            }
+        }
+    ]
+}

.github/dependabot.yml

@@ -0,0 +1,9 @@
+version: 2
+updates:
+  # Enable version updates for Gradle
+  - package-ecosystem: "gradle"
+    # Look for `build.gradle` in the `root` directory
+    directory: "/"
+    # Check for updates once daily
+    schedule:
+      interval: "daily"

.github/workflows/build.yml

@@ -0,0 +1,35 @@
+# This workflow will build a Java project with Gradle
+# For more information see: https://help.github.com/actions/language-and-framework-guides/building-and-testing-java-with-gradle
+
+name: Build
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        java: [ '21' ]
+
+    steps:
+      - uses: actions/checkout@v3
+      - uses: gradle/wrapper-validation-action@v1
+      - name: Set up JDK ${{ matrix.java }}
+        uses: actions/setup-java@v3
+        with:
+          java-version: ${{ matrix.java }}
+          distribution: 'temurin'
+      - name: Grant execute permission for gradlew
+        run: chmod +x gradlew
+      - name: Build with Gradle
+        run: ./gradlew build
+      - name: Upload coverage reports
+        uses: codecov/codecov-action@v3
+        with:
+          files: build/reports/kover/report.xml

.gitignore

@@ -0,0 +1,35 @@
+.DS_Store
+.idea/shelf
+/android.tests.dependencies
+/confluence/target
+/dependencies
+/dist
+/local
+/gh-pages
+/ideaSDK
+/clionSDK
+/android-studio/sdk
+out/
+/tmp
+workspace.xml
+*.versionsBackup
+/idea/testData/debugger/tinyApp/classes*
+/jps-plugin/testData/kannotator
+/ultimate/dependencies
+/ultimate/ideaSDK
+/ultimate/out
+/ultimate/tmp
+/js/js.translator/testData/out/
+/js/js.translator/testData/out-min/
+.gradle/
+build/
+!**/src/**/build
+!**/test/**/build
+*.iml
+!**/testData/**/*.iml
+*.iml
+/local.properties
+/.idea
+.DS_Store
+/build
+/captures

.kotlin/errors/errors-1732378159970.log

@@ -0,0 +1,4 @@
+kotlin version: 2.0.21
+error message: The daemon has terminated unexpectedly on startup attempt #1 with error code: 0. The daemon process output:
+    1. Kotlin compile daemon is ready
+

.kotlin/errors/errors-1732477966480.log

@@ -0,0 +1,4 @@
+kotlin version: 2.0.21
+error message: The daemon has terminated unexpectedly on startup attempt #1 with error code: 0. The daemon process output:
+    1. Kotlin compile daemon is ready
+

.kotlin/errors/errors-1734368771992.log

@@ -0,0 +1,4 @@
+kotlin version: 2.0.21
+error message: The daemon has terminated unexpectedly on startup attempt #1 with error code: 0. The daemon process output:
+    1. Kotlin compile daemon is ready
+

.kotlin/errors/errors-1735820034213.log

@@ -0,0 +1,4 @@
+kotlin version: 2.0.21
+error message: The daemon has terminated unexpectedly on startup attempt #1 with error code: 0. The daemon process output:
+    1. Kotlin compile daemon is ready
+

Dockerfile

@@ -0,0 +1,19 @@
+FROM gradle:8-jdk21 AS build
+
+USER gradle
+WORKDIR /app
+
+COPY build.gradle settings.gradle ./
+COPY src/ ./src
+
+RUN gradle installDist --no-daemon
+
+FROM eclipse-temurin:21-jre-jammy
+
+EXPOSE 8080
+
+WORKDIR /app
+
+COPY --from=build /app/build/install/kotlin-ktor-exposed-starter .
+
+ENTRYPOINT ["./bin/kotlin-ktor-exposed-starter"]

README.md

@@ -0,0 +1,101 @@
+[![Kotlin](https://img.shields.io/badge/kotlin-2.0.21-blue.svg?logo=kotlin)](http://kotlinlang.org)
+[![Ktor](https://img.shields.io/badge/ktor-3.0.0-blue.svg)](https://github.com/ktorio/ktor)
+[![Build](https://github.com/raharrison/kotlin-ktor-exposed-starter/workflows/Build/badge.svg)](https://github.com/raharrison/kotlin-ktor-exposed-starter/actions/workflows/build.yml)
+[![codecov](https://codecov.io/gh/raharrison/kotlin-ktor-exposed-starter/branch/master/graph/badge.svg?token=v2k9oObm0C)](https://codecov.io/gh/raharrison/kotlin-ktor-exposed-starter)
+
+## Starter project to create a simple RESTful web service in Kotlin
+
+**Updated for Kotlin 2.0.21 and Ktor 3.0.0**
+
+Companion article: <https://ryanharrison.co.uk/2018/04/14/kotlin-ktor-exposed-starter.html>
+
+## Getting Started
+
+1. Clone the repo.
+2. In the root directory execute `./gradlew run`
+3. By default, the server will start on port `8080`. See below [Routes](#routes) section for more information.
+
+### Libraries used:
+
+ - [Ktor](https://github.com/ktorio/ktor) - Kotlin async web framework
+ - [Netty](https://github.com/netty/netty) - Async web server
+ - [Kotlin Serialization](https://github.com/Kotlin/kotlinx.serialization) - JSON serialization/deserialization
+ - [Exposed](https://github.com/JetBrains/Exposed) - Kotlin SQL framework
+ - [H2](https://github.com/h2database/h2database) - Embeddable database
+ - [HikariCP](https://github.com/brettwooldridge/HikariCP) - High performance JDBC connection pooling
+ - [Flyway](https://flywaydb.org/) - Database migrations
+ - [JUnit 5](https://junit.org/junit5/), [AssertJ](http://joel-costigliola.github.io/assertj/)
+   and [Rest Assured](http://rest-assured.io/) for testing
+ - [Kover](https://github.com/Kotlin/kotlinx-kover) for code coverage, publishing
+   to [Codecov](https://about.codecov.io/) through GitHub Actions
+ 
+The starter project creates a new in-memory H2 database with one table for `Widget` instances.
+
+As ktor is async and based on coroutines, standard blocking JDBC may cause performance issues when used
+directly on the main thread pool (as threads must be reused for other requests). Therefore, another dedicated thread
+pool is created for all database queries, alongside connection pooling with HikariCP. 
+
+### Routes:
+
+`GET /widgets` --> get all widgets in the database
+
+`GET /widgets/{id}` --> get one widget instance by id (integer)
+
+`POST /widgets` --> add a new widget to the database by providing a JSON object (converted to a NewWidget instance). e.g - 
+
+```json
+{
+    "name": "new widget",
+    "quantity": 64
+}
+```
+
+returns
+
+```json
+{
+    "id": 3,
+    "name": "new widget",
+    "quantity": 64,
+    "dateUpdated": 1519926898
+}
+```  
+    
+`PUT /widgets` --> update an existing widgets name or quantity. Pass in the id in the JSON request to determine which record to update
+
+`DELETE /widgets/{id}` --> delete the widget with the specified id
+
+### Notifications (WebSocket)
+
+All updates (creates, updates and deletes) to `Widget` instances are served as notifications through a WebSocket endpoint:
+
+`WS /updates` --> returns `Notification` instances containing the change type, id and entity (if applicable) e.g:
+
+```json
+{ 
+    "type": "CREATE", 
+    "id": 12, 
+    "entity": { 
+      "id": 12, 
+      "name": "widget1", 
+      "quantity": 5, 
+      "dateUpdated": 1533583858169 
+    }
+}
+```
+
+The websocket listener will also log out any text messages send by the client. Refer to [this blog post](https://ryanharrison.co.uk/2018/08/19/testing-websockets.html) for some useful tools to test the websocket behaviour.
+
+### Testing
+
+The sample Widget service and corresponding endpoints are also tested with 100% coverage. Upon startup of the main JUnit suite (via the `test` source folder), the server is started ready for testing and is torn down after all tests are run.
+
+- Unit testing of services with AssertJ - DAO and business logic is tested by initialising an in-memory H2 database with
+  Exposed, using the same schema as the main app. With this approach database queries are fully tested without any
+  mocking.
+- Integration testing of endpoints using a fully running server with Rest Assured - routing tests/status codes/response
+  structure. This utilises the fact that Ktor is a small microframework that can be easily spun up and down as part of
+  the test suite. You could also use the special test engine that [Ktor provides](https://ktor.io/docs/testing.html),
+  however my preference is to always start a full version of the server so that HTTP behaviour can be tested without
+  relying on special internal mechanisms.
+- Code coverage and reporting performed automatically by Kover as part of the Gradle build

build.gradle.kts

@@ -0,0 +1,59 @@
+val ktorVersion = "3.0.0"
+val exposedVersion = "0.55.0"
+val h2Version = "2.3.232"
+val hikariCpVersion = "5.1.0"
+val flywayVersion = "10.20.1"
+val logbackVersion = "1.5.12"
+val assertjVersion = "3.26.3"
+val restAssuredVersion = "5.5.0"
+val junitVersion = "5.11.3"
+val psqlVersion = "42.7.4"
+
+plugins {
+    kotlin("jvm") version "2.0.21"
+    kotlin("plugin.serialization") version "2.0.21"
+    id("org.jetbrains.kotlinx.kover") version "0.8.2"
+    application
+}
+
+repositories {
+    mavenCentral()
+}
+
+dependencies {
+    implementation("io.ktor:ktor-server-core:$ktorVersion")
+    implementation("io.ktor:ktor-serialization:$ktorVersion")
+    implementation("io.ktor:ktor-server-netty:$ktorVersion")
+    implementation("io.ktor:ktor-server-call-logging:$ktorVersion")
+    implementation("io.ktor:ktor-server-default-headers:$ktorVersion")
+    implementation("io.ktor:ktor-server-websockets:$ktorVersion")
+    implementation("io.ktor:ktor-server-content-negotiation:$ktorVersion")
+    implementation("io.ktor:ktor-serialization-kotlinx-json:$ktorVersion")
+
+    implementation("org.jetbrains.kotlin:kotlin-stdlib:1.7.20")
+    implementation("com.github.seratch:kotliquery:1.9.0")
+    implementation("com.h2database:h2:$h2Version")
+    implementation("org.postgresql:postgresql:$psqlVersion")
+    implementation("org.jetbrains.exposed:exposed-core:$exposedVersion")
+    implementation("org.jetbrains.exposed:exposed-dao:$exposedVersion")
+    implementation("org.jetbrains.exposed:exposed-jdbc:$exposedVersion")
+    implementation("org.jetbrains.exposed:exposed-json:$exposedVersion")
+    implementation("com.zaxxer:HikariCP:$hikariCpVersion")
+    implementation("org.flywaydb:flyway-core:$flywayVersion")
+    implementation("ch.qos.logback:logback-classic:$logbackVersion")
+    implementation("de.m3y.kformat:kformat:0.11")
+
+    testImplementation("org.assertj:assertj-core:$assertjVersion")
+    testImplementation("io.rest-assured:rest-assured:$restAssuredVersion")
+    testImplementation("org.junit.jupiter:junit-jupiter-api:$junitVersion")
+    testRuntimeOnly("org.junit.jupiter:junit-jupiter-engine:$junitVersion")
+    testImplementation("io.ktor:ktor-client-cio:$ktorVersion")
+}
+
+application {
+    mainClass.set("MainKt")
+}
+
+tasks.withType<Test> {
+    useJUnitPlatform()
+}

gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,5 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.9-bin.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists

gradlew

@@ -0,0 +1,234 @@
+#!/bin/sh
+
+#
+# Copyright <20> 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 <20>$var<61>, <20>${var}<7D>, <20>${var:-default}<7D>, <20>${var+SET}<7D>,
+#           <20>${var#prefix}<7D>, <20>${var%suffix}<7D>, and <20>$( cmd )<29>;
+#         * compound commands having a testable exit status, especially <20>case<73>;
+#         * various built-in commands including <20>command<6E>, <20>set<65>, and <20>ulimit<69>.
+#
+#   Important for patching:
+#
+#   (2) This script targets any POSIX shell, so it avoids extensions provided
+#       by Bash, Ksh, etc; in particular arrays are avoided.
+#
+#       The "traditional" practice of packing multiple parameters into a
+#       space-separated string is a well documented source of bugs and security
+#       problems, so this is (mostly) avoided, by progressively accumulating
+#       options in "$@", 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/master/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
+
+APP_HOME=$( cd "${APP_HOME:-./}" && pwd -P ) || exit
+
+APP_NAME="Gradle"
+APP_BASE_NAME=${0##*/}
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx1024m" "-Xms1024m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+    echo "$*"
+} >&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: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD=java
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+    case $MAX_FD in #(
+      max*)
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        ulimit -n "$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
+
+# Collect all arguments for the java command;
+#   * $DEFAULT_JVM_OPTS, $JAVA_OPTS, and $GRADLE_OPTS can contain fragments of
+#     shell script including quotes and variable substitutions, so put them in
+#     double quotes to make sure that they get re-expanded; and
+#   * put everything else in single quotes, so that it's not re-expanded.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -classpath "$CLASSPATH" \
+        org.gradle.wrapper.GradleWrapperMain \
+        "$@"
+
+# 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 "$JAVACMD" "$@"

gradlew.bat

@@ -0,0 +1,89 @@
+@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=.
+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%" == "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%"=="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!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

settings.gradle

@@ -0,0 +1 @@
+rootProject.name = 'kotlin-ktor-exposed-starter'

src/main/kotlin/Main.kt

@@ -0,0 +1,40 @@
+import io.ktor.serialization.kotlinx.*
+import io.ktor.serialization.kotlinx.json.*
+import io.ktor.server.application.*
+import io.ktor.server.netty.*
+import io.ktor.server.plugins.calllogging.*
+import io.ktor.server.plugins.contentnegotiation.*
+import io.ktor.server.plugins.defaultheaders.*
+import io.ktor.server.routing.*
+import io.ktor.server.websocket.*
+import service.DatabaseFactory
+//import service.WidgetService
+import util.JsonMapper
+import web.index
+//import web.widget
+
+fun Application.module() {
+    install(DefaultHeaders)
+    install(CallLogging)
+    install(WebSockets) {
+        contentConverter = KotlinxWebsocketSerializationConverter(JsonMapper.defaultMapper)
+    }
+
+    install(ContentNegotiation) {
+        json(JsonMapper.defaultMapper)
+    }
+
+    DatabaseFactory.connectAndMigrate()
+
+    //val widgetService = WidgetService()
+
+    routing {
+        index()
+    //    widget(widgetService)
+    }
+
+}
+
+fun main(args: Array<String>) {
+    EngineMain.main(args)
+}

src/main/kotlin/dao/DictTypeDao.kt

@@ -0,0 +1,12 @@
+package dao
+
+import org.jetbrains.exposed.dao.*
+import org.jetbrains.exposed.dao.id.EntityID
+import tables.DictTypes
+
+class DictTypeDao(id: EntityID<Int>) : IntEntity(id) {
+    companion object : IntEntityClass<DictTypeDao>(DictTypes)
+
+    var shortName by DictTypes.shortName
+    var fullName by DictTypes.fullName
+}

src/main/kotlin/dao/DictionaryDao.kt

@@ -0,0 +1,12 @@
+package dao
+
+import org.jetbrains.exposed.dao.*
+import org.jetbrains.exposed.dao.id.EntityID
+import tables.Dictionaries
+
+class DictionaryDao(id: EntityID<Int>) : IntEntity(id) {
+    companion object : IntEntityClass<DictionaryDao>(Dictionaries)
+
+    var name by Dictionaries.name
+    var fullName by Dictionaries.fullName
+}

src/main/kotlin/dao/LanguageDao.kt

@@ -0,0 +1,12 @@
+package dao
+
+import org.jetbrains.exposed.dao.*
+import org.jetbrains.exposed.dao.id.EntityID
+import tables.Languages
+
+class LanguageDao(id: EntityID<Int>) : IntEntity(id) {
+    companion object : IntEntityClass<LanguageDao>(Languages)
+
+    var name by Languages.name
+    var shortName by Languages.shortName
+}

src/main/kotlin/dao/PronunciationDao.kt

@@ -0,0 +1,13 @@
+package dao
+
+import models.Translation
+import org.jetbrains.exposed.dao.*
+import org.jetbrains.exposed.dao.id.EntityID
+import tables.Pronunciations
+
+class PronunciationDao(id: EntityID<Int>) : IntEntity(id) {
+    companion object : IntEntityClass<PronunciationDao>(Pronunciations)
+
+    var ipa by Pronunciations.ipa
+    var filename by Pronunciations.filename
+}

src/main/kotlin/dao/PronunciationTypeDao.kt

@@ -0,0 +1,12 @@
+package dao
+
+import models.Translation
+import org.jetbrains.exposed.dao.*
+import org.jetbrains.exposed.dao.id.EntityID
+import tables.PronunciationTypes
+
+class PronunciationTypeDao(id: EntityID<Int>) : IntEntity(id) {
+    companion object : IntEntityClass<PronunciationTypeDao>(PronunciationTypes)
+
+    var name by PronunciationTypes.name
+}

src/main/kotlin/dao/SuffixDao.kt

@@ -0,0 +1,11 @@
+package dao
+
+import org.jetbrains.exposed.dao.*
+import org.jetbrains.exposed.dao.id.EntityID
+import tables.Suffixes
+
+class SuffixDao(id: EntityID<Int>) : IntEntity(id) {
+    companion object : IntEntityClass<SuffixDao>(Suffixes)
+
+    var text by Suffixes.text
+}

src/main/kotlin/dao/TranslationDao.kt

@@ -0,0 +1,14 @@
+package dao
+
+import models.Translation
+import org.jetbrains.exposed.dao.*
+import org.jetbrains.exposed.dao.id.EntityID
+import tables.Translations
+
+class TranslationDao(id: EntityID<Int>) : IntEntity(id) {
+    companion object : IntEntityClass<TranslationDao>(Translations)
+
+    var langName1 by Translations.langName1
+    var langName2 by Translations.langName2
+    var direction by Translations.direction
+}

src/main/kotlin/db/migration/V1__test_connection.kt

@@ -0,0 +1,193 @@
+package db.migration
+
+import org.flywaydb.core.api.migration.BaseJavaMigration
+import org.flywaydb.core.api.migration.Context
+import org.jetbrains.exposed.sql.SchemaUtils
+import org.jetbrains.exposed.sql.insert
+import org.jetbrains.exposed.sql.transactions.transaction
+import kotlin.collections.*
+import kotliquery.*
+import de.m3y.kformat.*
+import de.m3y.kformat.Table.Hints
+import kotlinx.serialization.json.JsonObject
+import kotlinx.serialization.json.Json
+
+val format = Json { encodeDefaults = true }
+
+data class Dictionary(
+    val id: Int,
+    val lang1Id: Int,
+    val lang2Id: Int,
+    val name: String,
+    val fullName: String)
+
+data class DictType(
+    val id: Int,
+    val shortName: String,
+    val fullName: String
+)
+data class Language(
+    val id: Int,
+    val name: String,
+    val shortName: String
+)
+data class Translation(
+    val id: Int,
+    val dictionaryId: Int,
+    val lang1Id: Int,
+    val lang2Id: Int,
+    val lang1Name: String,
+    val lang2Name: String,
+    val direction: Int
+)
+
+data class Pronunciation(
+    val id: Int,
+    val typeId: Int,
+    val ipa: String?,
+    val filename: String?
+)
+
+data class PronunciationType(
+    val id: Int,
+    val name: String?
+)
+data class TermsPronunciation(
+    val termId: Int,
+    val pronunciationId: Int,
+)
+
+data class Suffix(
+    val id: Int,
+    val text: String
+)
+
+data class Term(
+    val id: Int,
+    val dictionaryId: Int,
+    val string1: String,
+    val string2: String,
+    val suffix1Id: Int?,
+    val suffix2Id: Int?,
+    val typeId: Int?,
+    val member: String?,
+    val order2: Int?,
+    val flags: String?
+)
+val toDictionary: (Row) -> Dictionary = { row ->
+    Dictionary(
+        row.int("id"),
+        row.int("lang1_id"),
+        row.int("lang2_id"),
+        row.string("name"),
+        row.string("full_name")
+        )
+}
+
+val toDictType: (Row) -> DictType = { row ->
+    DictType(
+        row.int("id"),
+        row.string("short_name"),
+        row.string("full_name")
+    )
+}
+val toLanguage: (Row) -> Language = { row ->
+    Language(
+        row.int("id"),
+        row.string("name"),
+        row.string("short_name")
+        )
+}
+val toTranslation: (Row) -> Translation = { row ->
+    Translation(
+        row.int("id"),
+        row.int("dictionary_id"),
+        row.int("lang1_id"),
+        row.int("lang2_id"),
+        row.string("lang_name1"),
+        row.string("lang_name2"),
+        row.int("direction"),
+        )
+}
+
+val toPronunciation: (Row) -> Pronunciation = { row ->
+    Pronunciation(
+        row.int("id"),
+        row.int("type_id"),
+        row.stringOrNull("ipa"),
+        row.stringOrNull("filename")
+        )
+}
+
+val toTermsPronunciation: (Row) -> TermsPronunciation = { row ->
+    TermsPronunciation(
+        row.int("term_id"),
+        row.int("pronunciation_id"),
+        )
+}
+
+val toSuffix: (Row) -> Suffix = { row ->
+    Suffix(
+        row.int("id"),
+        row.string("text")
+    )
+}
+val toTerm: (Row) -> Term = { row ->
+    Term(
+        row.int("id"),
+        row.int("dictionary_id"),
+        row.string("string1"),
+        row.string("string2"),
+        row.intOrNull("suffix1_id"),
+        row.intOrNull("suffix2_id"),
+        row.intOrNull("type_id"),
+        row.stringOrNull("member"),
+        row.intOrNull("order2"),
+        row.stringOrNull("flags")
+        )
+}
+
+object SharedData {
+    var hashDict: Map<Int,Dictionary> = mapOf()
+    var hashDictType: Map<Int,DictType> = mapOf()
+    var hashLang: Map<Int,Language> = mapOf()
+    var hashTransMap: Map<Int,Translation> = mapOf()
+    var hashPron: Map<Int,Pronunciation> = mapOf()
+    var hashSuffix: Map<Int,Suffix> = mapOf()
+    var hashTermPron : Map<Int,TermsPronunciation> = mapOf()
+    var listTerm : List<Term>  = listOf()
+    var getListofTerms : (Int) -> List<Term> = {
+        listOf()
+    }
+}
+
+class V1__test_connection: BaseJavaMigration() {
+    override fun migrate(context: Context?) {
+        val session = sessionOf("jdbc:postgresql://nuc.lan:5432/dict", "dict_user", "PW4dbdict")
+        val allNameQuery = queryOf("select * from dictionary").map(toDictionary).asList
+        val allDict = session.run(allNameQuery)
+        SharedData.hashDict = allDict.associateBy { it.id }
+        val allDictTypeQuery = queryOf("select * from dict_type").map(toDictType).asList
+        val allDictType = session.run(allDictTypeQuery)
+        SharedData.hashDictType = allDictType.associateBy { it.id }
+        val allTranslationQuery = queryOf("select * from translation").map(toTranslation).asList
+        val allTranslation = session.run(allTranslationQuery)
+        SharedData.hashTransMap = allTranslation.associateBy { it.id }
+        val allLangQuery = queryOf("select * from language").map(toLanguage).asList
+        val allLanguages = session.run(allLangQuery)
+        SharedData.hashLang = allLanguages.associateBy { it.id }
+        val allSuffixQuery = queryOf("select * from suffix").map(toSuffix).asList
+        val allSuffix = session.run(allSuffixQuery)
+        SharedData.hashSuffix = allSuffix.associateBy { it.id }
+        val allPronunciationQuery = queryOf("select * from pronunciation").map(toPronunciation).asList
+        val allPronunciation = session.run(allPronunciationQuery)
+        SharedData.hashPron = allPronunciation.associateBy { it.id }
+        val allTermsPronunciationQuery = queryOf("select * from terms_pronunciations").map(toTermsPronunciation).asList
+        val allTermsPronunciation = session.run(allTermsPronunciationQuery)
+        SharedData.hashTermPron = allTermsPronunciation.associateBy { it.termId }
+        SharedData.getListofTerms = {
+            session.run(queryOf("select * from term WHERE dictionary_id=${it}").map(toTerm).asList)
+        }
+
+    }
+}

src/main/kotlin/db/migration/V2__crete_settingsdb.kt

@@ -0,0 +1,53 @@
+package db.migration
+
+import dao.DictionaryDao
+import kotlinx.serialization.decodeFromString
+import tables.*
+import org.flywaydb.core.api.migration.BaseJavaMigration
+import org.flywaydb.core.api.migration.Context
+import org.jetbrains.exposed.dao.id.EntityID
+import org.jetbrains.exposed.sql.SchemaUtils
+import org.jetbrains.exposed.sql.insert
+import org.jetbrains.exposed.sql.transactions.transaction
+import org.jetbrains.exposed.sql.upsert
+
+class V2__create_settingsdb: BaseJavaMigration() {
+    override fun migrate(context: Context?) {
+        transaction {
+            SchemaUtils.create(Dictionaries, Languages, Translations, Settings)
+
+            for ((di, lang) in SharedData.hashLang) {
+                Languages.insert {
+                    it[id] = lang.id
+                    it[name] = lang.name
+                    it[shortName] = lang.shortName
+                }
+            }
+
+            for ((di, dict) in SharedData.hashDict) {
+                Dictionaries.insert {
+                    it[id] = dict.id
+                    it[lang1] = dict.lang1Id
+                    it[lang2] = dict.lang2Id
+                    it[name] = dict.name
+                    it[fullName] = dict.fullName
+                }
+            }
+
+
+
+            for ((di, trans) in SharedData.hashTransMap) {
+                Translations.insert {
+                    it[id] = trans.id
+                    it[lang1Id] = trans.lang1Id
+                    it[lang2Id] = trans.lang2Id
+                    it[dictionaryId] = trans.dictionaryId
+                    it[langName1] = trans.lang1Name
+                    it[langName2] = trans.lang2Name
+                    it[direction] = trans.direction
+                }
+            }
+
+        }
+    }
+}

src/main/kotlin/db/migration/V3__create_dictionaries.kt

@@ -0,0 +1,117 @@
+package db.migration
+
+import dao.DictionaryDao
+import kotlinx.serialization.decodeFromString
+import tables.*
+import org.flywaydb.core.api.migration.BaseJavaMigration
+import org.flywaydb.core.api.migration.Context
+import org.jetbrains.exposed.dao.id.EntityID
+import org.jetbrains.exposed.sql.Database
+import org.jetbrains.exposed.sql.SchemaUtils
+import org.jetbrains.exposed.sql.insert
+import org.jetbrains.exposed.sql.transactions.transaction
+import org.jetbrains.exposed.sql.upsert
+import kotlin.system.exitProcess
+
+class V3__create_dictionaries: BaseJavaMigration() {
+    override fun migrate(context: Context?) {
+        println(SharedData.hashDict)
+        //exitProcess(0)
+        for ((db_id,dict) in SharedData.hashDict) {
+
+            val db_name = "jdbc:h2:file:/Users/jaro/data/${SharedData.hashLang[dict.lang1Id]?.shortName}-${SharedData.hashLang[dict.lang2Id]?.shortName}"
+            println(db_name)
+            val db = Database.connect(db_name)
+            transaction (db) {
+                SchemaUtils.create(Dictionaries, Languages, Translations, Pronunciations, PronunciationTypes, DictTypes, Suffixes, Terms)
+
+                for ((di, lang) in SharedData.hashLang) {
+                    Languages.insert {
+                        it[id] = lang.id
+                        it[name] = lang.name
+                        it[shortName] = lang.shortName
+                    }
+                }
+
+                for ((di, d) in SharedData.hashDict) {
+                    Dictionaries.insert {
+                        it[id] = d.id
+                        it[lang1] = d.lang1Id
+                        it[lang2] = d.lang2Id
+                        it[name] = d.name
+                        it[fullName] = d.fullName
+                    }
+                }
+
+                for ((di, trans) in SharedData.hashTransMap) {
+                    Translations.insert {
+                        it[id] = trans.id
+                        it[lang1Id] = trans.lang1Id
+                        it[lang2Id] = trans.lang2Id
+                        it[dictionaryId] = trans.dictionaryId
+                        it[langName1] = trans.lang1Name
+                        it[langName2] = trans.lang2Name
+                        it[direction] = trans.direction
+                    }
+                }
+
+                PronunciationTypes.insert {
+                    it[id] = 1
+                    it[name] = "English"
+                }
+
+                PronunciationTypes.insert {
+                    it[id] = 2
+                    it[name] = "American english"
+                }
+
+                PronunciationTypes.insert {
+                    it[id] = 3
+                    it[name] = "Business english"
+                }
+
+                for ((di, pron) in SharedData.hashPron) {
+                    Pronunciations.insert {
+                        it[id] = pron.id
+                        it[typeId] = pron.typeId
+                        it[ipa] = pron.ipa
+                        it[filename] = pron.filename
+                    }
+                }
+
+                for ((di, dt) in SharedData.hashDictType) {
+                    DictTypes.insert {
+                        it[id] = dt.id
+                        it[shortName] = dt.shortName
+                        it[fullName] = dt.fullName
+                    }
+                }
+
+                for ((di, ss) in SharedData.hashSuffix) {
+                    Suffixes.insert {
+                        it[id] = ss.id
+                        it[text] = ss.text
+                    }
+                }
+
+                var dictTerms = SharedData.getListofTerms(db_id)
+                for (t in dictTerms) {
+                    Terms.insert {
+                        it[id] = t.id
+                        it[string1] = t.string1
+                        it[string2] = t.string2
+                        it[suffix1] = t.suffix1Id
+                        it[suffix2] = t.suffix2Id
+                        it[type] = t.typeId
+                        it[member] = t.member
+                        it[order2] = t.order2
+                        it[flags] = format.decodeFromString<IntArray?>(t.flags?.toString() ?:"[]")
+                    }
+                }
+                dictTerms = listOf()
+
+            }
+
+        }
+    }
+}

src/main/kotlin/models/DictType.kt

@@ -0,0 +1,14 @@
+package models
+
+import kotlinx.serialization.Serializable
+import org.jetbrains.exposed.sql.Table
+
+
+
+@Serializable
+data class DictType(
+        val id: Int,
+        val shortName: String,
+        val fullName: String
+        )
+

src/main/kotlin/models/Dictionary.kt

@@ -0,0 +1,17 @@
+package models
+
+import kotlinx.serialization.Serializable
+import org.jetbrains.exposed.sql.Table
+
+
+
+@Serializable
+data class Dictionary(
+        val id: Int,
+        val lang1Id: Int,
+        val lang2Id: Int,
+        val name: String?,
+        val fullName: String?,
+        val translations: List<Translation> = emptyList()
+)
+

src/main/kotlin/models/Language.kt

@@ -0,0 +1,15 @@
+package models
+
+import kotlinx.serialization.Serializable
+import org.jetbrains.exposed.sql.Table
+
+
+
+@Serializable
+data class Language(
+    val id: Int,
+    val name: String,
+    val shortName: String
+)
+
+

src/main/kotlin/models/Pronunciation.kt

@@ -0,0 +1,12 @@
+package models
+
+import kotlinx.serialization.Serializable
+import org.jetbrains.exposed.sql.Table
+
+@Serializable
+data class Pronunciation(
+    val id: Int,
+    val typeId: Int,
+    val ipa: String?,
+    val filename: String?
+)

src/main/kotlin/models/PronunciationType.kt

@@ -0,0 +1,10 @@
+package models
+
+import kotlinx.serialization.Serializable
+import org.jetbrains.exposed.sql.Table
+
+@Serializable
+data class PronunciationType(
+    val id: Int,
+    val name: String?
+)

src/main/kotlin/models/Setting.kt

@@ -0,0 +1,12 @@
+package models
+
+import kotlinx.serialization.Serializable
+import org.jetbrains.exposed.sql.Table
+
+@Serializable
+data class Settings(
+        val id: Int,
+        val dictionary: Int?,
+        val lastSearch: String?,
+)
+

src/main/kotlin/models/Suffix.kt

@@ -0,0 +1,11 @@
+package models
+
+import kotlinx.serialization.Serializable
+import org.jetbrains.exposed.sql.Table
+
+
+@Serializable
+data class Suffix(
+    val id: Int,
+    val text: String
+)

src/main/kotlin/models/Term.kt

@@ -0,0 +1,20 @@
+package models
+
+import kotlinx.serialization.Serializable
+import kotlinx.serialization.json.JsonObject
+import org.jetbrains.exposed.sql.Table
+
+
+@Serializable
+data class Term(
+    val id: Int,
+    val dictionaryId: Int,
+    val string1: String,
+    val string2: String,
+    val typeId: Int,
+    val suffix1Id: Int,
+    val suffix2Id: Int,
+    val member: String?,
+    val order2: Int,
+    val flags: JsonObject?
+)

src/main/kotlin/models/Translation.kt

@@ -0,0 +1,17 @@
+package models
+
+import kotlinx.serialization.Serializable
+import org.jetbrains.exposed.sql.Table
+
+
+
+@Serializable
+data class Translation(
+    val id: Int,
+    val dictionaryId: Int,
+    val lang1Id: Int,
+    val lang2Id: Int,
+    val lang1Name: String?,
+    val lang2Name: String?,
+    val direction: Int
+)

src/main/kotlin/service/DatabaseFactory.kt

@@ -0,0 +1,54 @@
+package service
+
+import com.zaxxer.hikari.HikariConfig
+import com.zaxxer.hikari.HikariDataSource
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.withContext
+import org.flywaydb.core.Flyway
+import org.jetbrains.exposed.sql.Database
+import org.jetbrains.exposed.sql.transactions.transaction
+import org.slf4j.LoggerFactory
+import javax.sql.DataSource
+
+object DatabaseFactory {
+
+    private val log = LoggerFactory.getLogger(this::class.java)
+
+    fun connectAndMigrate() {
+        log.info("Initialising database")
+        val pool = hikari()
+        Database.connect(pool)
+        runFlyway(pool)
+    }
+
+    private fun hikari(): HikariDataSource {
+        val config = HikariConfig().apply {
+            driverClassName = "org.h2.Driver"
+            jdbcUrl = "jdbc:h2:file:/Users/jaro/data/dict_settings"
+            maximumPoolSize = 3
+            isAutoCommit = false
+            transactionIsolation = "TRANSACTION_REPEATABLE_READ"
+            validate()
+        }
+        return HikariDataSource(config)
+    }
+
+    private fun runFlyway(datasource: DataSource) {
+        val flyway = Flyway.configure().dataSource(datasource).load()
+        try {
+            flyway.info()
+            flyway.migrate()
+        } catch (e: Exception) {
+            log.error("Exception running flyway migration", e)
+            throw e
+        }
+        log.info("Flyway migration has finished")
+    }
+
+    suspend fun <T> dbExec(
+        block: () -> T
+    ): T = withContext(Dispatchers.IO) {
+        transaction { block() }
+    }
+
+}

src/main/kotlin/tables/DictType.kt

@@ -0,0 +1,8 @@
+package tables
+
+import org.jetbrains.exposed.dao.id.IntIdTable
+
+object DictTypes : IntIdTable() {
+    val shortName = varchar("short_name", 255)
+    val fullName = varchar("full_name", 255)
+}

src/main/kotlin/tables/Dictionary.kt

@@ -0,0 +1,10 @@
+package tables
+
+import org.jetbrains.exposed.dao.id.IntIdTable
+
+object Dictionaries : IntIdTable() {
+    val lang1 = reference("lang1_id", Languages)
+    val lang2 = reference("lang2_id", Languages)
+    val name = varchar("name", 255)
+    val fullName = varchar("full_name", 255)
+}

src/main/kotlin/tables/Language.kt

@@ -0,0 +1,8 @@
+package tables
+
+import org.jetbrains.exposed.dao.id.IntIdTable
+
+object Languages : IntIdTable() {
+    val name = varchar("name", 255)
+    val shortName = varchar("short_name", 255)
+}

src/main/kotlin/tables/Pronunciation.kt

@@ -0,0 +1,10 @@
+package tables
+
+import org.jetbrains.exposed.dao.id.IntIdTable
+
+object Pronunciations : IntIdTable() {
+    val typeId = reference("type_id",PronunciationTypes)
+
+    val ipa = varchar("ipa", 255).nullable()
+    val filename = varchar("filename", 255).nullable()
+}

src/main/kotlin/tables/PronunciationType.kt

@@ -0,0 +1,7 @@
+package tables
+
+import org.jetbrains.exposed.dao.id.IntIdTable
+
+object PronunciationTypes : IntIdTable() {
+    val name = varchar("name", 255)
+}

src/main/kotlin/tables/Setting.kt

@@ -0,0 +1,8 @@
+package tables
+
+import org.jetbrains.exposed.dao.id.IntIdTable
+
+object Settings : IntIdTable() {
+    val dictionary =  reference("dictionary_id",Dictionaries)
+    val lastSearch = varchar("last_search", 255).nullable()
+}

src/main/kotlin/tables/Suffix.kt

@@ -0,0 +1,7 @@
+package tables
+
+import org.jetbrains.exposed.dao.id.IntIdTable
+
+object Suffixes : IntIdTable() {
+    val text = varchar("text", 255)
+}

src/main/kotlin/tables/Term.kt

@@ -0,0 +1,17 @@
+package tables
+
+import org.jetbrains.exposed.dao.id.IntIdTable
+import org.jetbrains.exposed.sql.json.json
+import kotlinx.serialization.json.Json
+import kotlinx.serialization.json.JsonObject
+import tables.Suffixes
+object Terms : IntIdTable() {
+    val string1 = varchar("string1", 255)
+    val string2 = varchar("string2", 255)
+    val suffix1 = reference("suffix1_id",Suffixes).nullable()
+    val suffix2 = reference("suffix2_id",Suffixes).nullable()
+    val type = reference("type_id",DictTypes).nullable()
+    val member = varchar("member", 255).nullable()
+    val order2 = integer("order2").nullable()
+    val flags = json<IntArray>("flags", Json.Default).nullable()
+}

src/main/kotlin/tables/Translation.kt

@@ -0,0 +1,13 @@
+package tables
+
+import org.jetbrains.exposed.dao.id.IntIdTable
+
+object Translations : IntIdTable() {
+    val dictionaryId = reference("dictionary_id",Dictionaries)
+    val lang1Id = reference("lang1_id",Languages)
+    val lang2Id = reference("lang2_id",Languages)
+
+    val langName1 = varchar("lang_name1", 255)
+    val langName2 = varchar("lang_name2", 255)
+    val direction = integer("direction")
+}

src/main/kotlin/util/JsonMapper.kt

@@ -0,0 +1,11 @@
+package util
+
+import kotlinx.serialization.json.Json
+
+object JsonMapper {
+
+    val defaultMapper = Json {
+        prettyPrint = true
+    }
+
+}

src/main/kotlin/web/IndexResource.kt

@@ -0,0 +1,14 @@
+package web
+
+import io.ktor.http.*
+import io.ktor.server.response.*
+import io.ktor.server.routing.*
+
+fun Route.index() {
+
+    val indexPage = javaClass.getResource("/index.html").readText()
+
+    get("/") {
+        call.respondText(indexPage, ContentType.Text.Html)
+    }
+}

src/main/kotlin/web/WidgetResource.kt.old

@@ -0,0 +1,64 @@
+package web
+
+import io.ktor.http.*
+import io.ktor.server.request.*
+import io.ktor.server.response.*
+import io.ktor.server.routing.*
+import io.ktor.server.websocket.*
+import io.ktor.websocket.*
+import model.NewWidget
+import service.WidgetService
+
+fun Route.widget(widgetService: WidgetService) {
+
+    route("/widgets") {
+
+        get {
+            call.respond(widgetService.getAllWidgets())
+        }
+
+        get("/{id}") {
+            val id = call.parameters["id"]?.toInt() ?: throw IllegalStateException("Must provide id")
+            val widget = widgetService.getWidget(id)
+            if (widget == null) call.respond(HttpStatusCode.NotFound)
+            else call.respond(widget)
+        }
+
+        post {
+            val widget = call.receive<NewWidget>()
+            call.respond(HttpStatusCode.Created, widgetService.addWidget(widget))
+        }
+
+        put {
+            val widget = call.receive<NewWidget>()
+            val updated = widgetService.updateWidget(widget)
+            if (updated == null) call.respond(HttpStatusCode.NotFound)
+            else call.respond(HttpStatusCode.OK, updated)
+        }
+
+        delete("/{id}") {
+            val id = call.parameters["id"]?.toInt() ?: throw IllegalStateException("Must provide id")
+            val removed = widgetService.deleteWidget(id)
+            if (removed) call.respond(HttpStatusCode.OK)
+            else call.respond(HttpStatusCode.NotFound)
+        }
+
+    }
+
+    webSocket("/updates") {
+        try {
+            widgetService.addChangeListener(this.hashCode()) {
+                sendSerialized(it)
+            }
+            for (frame in incoming) {
+                if (frame.frameType == FrameType.CLOSE) {
+                    break
+                } else if (frame is Frame.Text) {
+                    call.application.environment.log.info("Received websocket message: {}", frame.readText())
+                }
+            }
+        } finally {
+            widgetService.removeChangeListener(this.hashCode())
+        }
+    }
+}

src/main/resources/application.conf

@@ -0,0 +1,10 @@
+ktor {
+    deployment {
+        port = 8080
+        watch = [  build ]
+    }
+
+    application {
+        modules = [ MainKt.module ]
+    }
+}

src/main/resources/index.html

@@ -0,0 +1,53 @@
+<!doctype html>
+
+<html lang="en">
+<head>
+    <meta charset="utf-8">
+    <title>Kotlin/Ktor/Exposed Starter - It's Working!</title>
+    <meta name="author" content="Ryan Harrison">
+</head>
+
+<body>
+<h1 id="it-s-working-">It&#39;s Working!</h1>
+<p>This starter project creates a new in-memory H2 database with one table for <code>Widget</code> instances. A simple RESTful interface is provided
+    to perform CRUD operations on <code>Widgets</code> alongside a websocket to be notified in real-time of any changes.</p>
+<h2 id="routes-">Routes:</h2>
+<p><code>GET /widgets</code> --&gt; get all widgets in the database</p>
+<p><code>GET /widgets/{id}</code> --&gt; get one widget instance by id (integer)</p>
+<p><code>POST /widgets</code> --&gt; add a new widget to the database by providing a JSON object (converted to a NewWidget instance).
+    e.g - </p>
+<pre><code>{
+    <span class="hljs-attr">"name"</span>: <span class="hljs-string">"new widget"</span>,
+    <span class="hljs-attr">"quantity"</span>: <span class="hljs-number">64</span>
+}
+</code></pre>
+<p>returns</p>
+<pre><code>{
+    <span class="hljs-attr">"id"</span>: <span class="hljs-number">4</span>,
+    <span class="hljs-attr">"name"</span>: <span class="hljs-string">"new widget"</span>,
+    <span class="hljs-attr">"quantity"</span>: <span class="hljs-number">64</span>,
+    <span class="hljs-attr">"dateCreated"</span>: <span class="hljs-number">1519926898</span>
+}
+</code></pre>
+<p><code>PUT /widgets</code> --&gt; update an existing widgets name or quantity. Pass in the id in the JSON request to determine which record to update
+</p>
+<p><code>DELETE /widgets/{id}</code> --&gt; delete the widget with the specified id</p>
+<h2 id="notifications-websocket-">Notifications (WebSocket)</h2>
+<p>All updates (creates, updates and deletes) to <code>Widget</code> instances are served as notifications through a WebSocket endpoint:</p>
+<p><code>WS /updates</code> --&gt; returns <code>Notification</code> instances containing the change type, id and entity (if applicable) e.g:</p>
+<pre><code class="lang-json">{
+    <span class="hljs-attr">"type"</span>: <span class="hljs-string">"CREATE"</span>,
+    <span class="hljs-attr">"id"</span>: <span class="hljs-number">12</span>,
+    <span class="hljs-attr">"entity"</span>: {
+      <span class="hljs-attr">"id"</span>: <span class="hljs-number">12</span>,
+      <span class="hljs-attr">"name"</span>: <span class="hljs-string">"widget1"</span>,
+      <span class="hljs-attr">"quantity"</span>: <span class="hljs-number">5</span>,
+      <span class="hljs-attr">"dateUpdated"</span>: <span class="hljs-number">1533583858169</span>
+    }
+}
+</code></pre>
+
+</body>
+</html>
+
+

src/main/resources/logback.xml

@@ -0,0 +1,15 @@
+<configuration>
+    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder>
+            <pattern>%d{YYYY-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>
+        </encoder>
+    </appender>
+
+    <root level="INFO">
+        <appender-ref ref="STDOUT"/>
+    </root>
+
+    <logger name="Exposed" level="DEBUG" />
+    <logger name="ktor.application" level="TRACE" />
+
+</configuration>