initial commit

src/Application.kt

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+package com.kmalbz
+
+import com.kmalbz.api.route.InputServiceServer
+import io.ktor.application.*
+import io.ktor.response.*
+import io.ktor.routing.*
+import io.ktor.http.*
+import io.ktor.gson.*
+import io.ktor.features.*
+import org.apache.http.HttpException
+import com.kmalbz.database.DatabaseFactory
+import com.kmalbz.database.dao.InputObjects
+import io.ktor.util.KtorExperimentalAPI
+import com.rabbitmq.client.*
+import com.typesafe.config.ConfigFactory
+import io.ktor.config.HoconApplicationConfig
+import org.jetbrains.exposed.sql.SchemaUtils
+import org.jetbrains.exposed.sql.transactions.transaction
+import org.koin.ktor.ext.Koin
+
+fun main(args: Array<String>): Unit = io.ktor.server.netty.EngineMain.main(args)
+
+@KtorExperimentalAPI
+@Suppress("unused") // Referenced in application.conf
+fun Application.module() {
+    install(ContentNegotiation) {
+        gson {
+        }
+    }
+
+    install(Koin) {
+        printLogger()
+        modules(com.kmalbz.di.injectionModule)
+    }
+
+    DatabaseFactory.init()
+    transaction{
+        SchemaUtils.create(InputObjects)
+    }
+
+    val appConfig = HoconApplicationConfig(ConfigFactory.load())
+    val factory = ConnectionFactory()
+    factory.host = appConfig.property("ktor.mq.host").getString()
+    factory.username = appConfig.property("ktor.mq.username").getString()
+    factory.password = appConfig.property("ktor.mq.password").getString()
+
+    val connection = factory.newConnection()
+    val channel = connection.createChannel()
+
+    val rabbitExchangeName = appConfig.property("ktor.mq.exchange").getString()
+
+    channel.exchangeDeclare(rabbitExchangeName, BuiltinExchangeType.FANOUT)
+    val queueName = channel.queueDeclare().queue
+    channel.queueBind(queueName, rabbitExchangeName, "")
+
+    routing {
+        install(StatusPages) {
+            exception<HttpException> {
+                call.respond(HttpStatusCode.BadRequest)
+            }
+
+            exception<IllegalStateException> {
+                call.respond(HttpStatusCode.NotAcceptable)
+            }
+        }
+
+        InputServiceServer().apply {
+            registerOutput()
+        }
+    }
+}

src/api/model/ApiObject.kt

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+package com.kmalbz.api.model
+
+import com.google.gson.annotations.SerializedName
+
+data class ApiObject(
+    @SerializedName("tag") val tag: String,
+    @SerializedName("probability") val probability: Double
+)

src/api/route/InputServiceServer.kt

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+package com.kmalbz.api.route
+
+import com.kmalbz.database.service.IInputObjectService
+import io.ktor.application.call
+import io.ktor.http.HttpStatusCode
+import io.ktor.response.respond
+import io.ktor.routing.Routing
+import io.ktor.routing.get
+import org.koin.ktor.ext.inject
+import java.time.LocalDate
+import java.time.format.DateTimeFormatter
+
+/**
+ * Output Service - RDB
+ * 
+ * This is the output interface of the Birbnetes system.
+ */
+class InputServiceServer {
+    /**
+     * output
+     */
+    fun Routing.registerOutput() {
+        val resultObjectService by inject<IInputObjectService>()
+        get("/output"){
+            call.respond(resultObjectService.getAllResultObjects())
+        }
+
+        get("/output/filter/negative") {
+            val resultList = resultObjectService.getResultObjecLessthanProbability(0.5) ?: call.respond(HttpStatusCode.NotFound)
+
+            call.respond(resultList)
+        }
+
+        get("/output/filter/positive") {
+            val resultList = resultObjectService.getResultObjecGreaterthanProbability(0.5) ?: call.respond(HttpStatusCode.NotFound)
+
+            call.respond(resultList)
+        }
+
+        get("/output/filter/undecided") {
+            val resultList = resultObjectService.getResultObjecEqualsProbability(0.5) ?: call.respond(HttpStatusCode.NotFound)
+
+            call.respond(resultList)
+        }
+
+        get("/output/after/{dateAfter}") {
+            val dateAfter = call.parameters["dateAfter"] ?: error(HttpStatusCode.NotAcceptable)
+            val dateTimeFormatter: DateTimeFormatter = DateTimeFormatter.ISO_LOCAL_DATE
+            val localDateAfter : LocalDate = LocalDate.parse(dateAfter,dateTimeFormatter)
+            val resultList = resultObjectService.getResultObjectafterDate(localDateAfter) ?: call.respond(HttpStatusCode.NotFound)
+
+            call.respond(resultList)
+        }
+
+        get("/output/before/{dateBefore}") {
+            val dateAfter = call.parameters["dateBefore"] ?: error(HttpStatusCode.NotAcceptable)
+            val dateTimeFormatter: DateTimeFormatter = DateTimeFormatter.ISO_LOCAL_DATE
+            val localDateBefore : LocalDate = LocalDate.parse(dateAfter,dateTimeFormatter)
+            val resultList = resultObjectService.getResultObjectbeforeDate(localDateBefore) ?: call.respond(HttpStatusCode.NotFound)
+
+            call.respond(resultList)
+        }
+
+        get("/output/{tagID}") {
+            val tagID = call.parameters["tagID"] ?: error(HttpStatusCode.NotAcceptable)
+            val resultObject = resultObjectService.getResultObjectbyTag(tagID) ?: call.respond(HttpStatusCode.NotFound)
+
+            call.respond(resultObject)
+        }
+    }
+}

src/database/DatabaseFactory.kt

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+package com.kmalbz.database
+
+import com.typesafe.config.ConfigFactory
+import com.zaxxer.hikari.*
+import io.ktor.config.HoconApplicationConfig
+import io.ktor.util.KtorExperimentalAPI
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.withContext
+import org.jetbrains.exposed.sql.*
+import org.jetbrains.exposed.sql.transactions.transaction
+
+object DatabaseFactory {
+
+    @KtorExperimentalAPI
+    private val appConfig = HoconApplicationConfig(ConfigFactory.load())
+    @KtorExperimentalAPI
+    private val dbUrl = appConfig.property("ktor.db.jdbc").getString()
+    @KtorExperimentalAPI
+    private val dbUser = appConfig.property("ktor.db.user").getString()
+    @KtorExperimentalAPI
+    private val dbPassword = appConfig.property("ktor.db.password").getString()
+
+    @KtorExperimentalAPI
+    fun init() {
+        Database.connect(hikari())
+    }
+
+    @KtorExperimentalAPI
+    private fun hikari(): HikariDataSource {
+        val config = HikariConfig()
+        config.driverClassName = "org.postgresql.Driver"
+        config.jdbcUrl = dbUrl
+        config.username = dbUser
+        config.password = dbPassword
+        config.maximumPoolSize = 3
+        config.isAutoCommit = false
+        config.transactionIsolation = "TRANSACTION_REPEATABLE_READ"
+        config.validate()
+        return HikariDataSource(config)
+    }
+
+    suspend fun <T> dbQuery(block: () -> T): T =
+        withContext(Dispatchers.IO) {
+            transaction { block() }
+        }
+}

src/database/dao/InputObjects.kt

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+package com.kmalbz.database.dao
+
+import org.jetbrains.exposed.dao.id.IntIdTable
+import org.jetbrains.exposed.sql.*
+import org.jetbrains.exposed.sql.`java-time`.date
+import java.time.LocalDate
+
+object InputObjects : IntIdTable() {
+    val tag: Column<String> = varchar("tag",32)
+    val date: Column<LocalDate> = date("date").default(LocalDate.now())
+    val probability: Column<Double> = double("probability")
+    override val primaryKey = PrimaryKey(id, name = "PK_ResultObject_Id")
+}

src/database/model/InputObject.kt

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+package com.kmalbz.database.model
+
+import com.kmalbz.database.dao.InputObjects
+import org.jetbrains.exposed.dao.IntEntity
+import org.jetbrains.exposed.dao.IntEntityClass
+import org.jetbrains.exposed.dao.id.EntityID
+
+class InputObject(id: EntityID<Int>): IntEntity(id) {
+    companion object : IntEntityClass<InputObject>(InputObjects)
+    var tag by InputObjects.tag
+    var date by InputObjects.date
+    var probability by InputObjects.probability
+}

src/database/service/IInputObjectService.kt

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+package com.kmalbz.database.service
+
+import com.kmalbz.api.model.ApiObject
+import java.time.LocalDate
+
+interface IInputObjectService{
+    fun addOne(apiObject: ApiObject)
+    suspend fun getAllResultObjects(): List<ApiObject>
+    suspend fun getResultObjectbyTag(tag: String): ApiObject?
+    suspend fun getResultObjectbyDate(date: LocalDate): List<ApiObject>?
+    suspend fun getResultObjectbeforeDate(date: LocalDate): List<ApiObject>?
+    suspend fun getResultObjectafterDate(date: LocalDate): List<ApiObject>?
+    suspend fun getResultObjecGreaterthanProbability(probability: Double): List<ApiObject>?
+    suspend fun getResultObjecLessthanProbability(probability: Double): List<ApiObject>?
+    suspend fun getResultObjecEqualsProbability(probability: Double): List<ApiObject>?
+}

src/database/service/InputObjectService.kt

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+package com.kmalbz.database.service
+
+import com.kmalbz.database.DatabaseFactory.dbQuery
+import com.kmalbz.database.model.InputObject
+import com.kmalbz.database.dao.InputObjects
+import com.kmalbz.api.model.ApiObject
+import org.jetbrains.exposed.sql.ResultRow
+import org.jetbrains.exposed.sql.select
+import org.jetbrains.exposed.sql.selectAll
+import org.jetbrains.exposed.sql.transactions.transaction
+import java.time.LocalDate
+
+
+class InputObjectService : IInputObjectService {
+
+    override fun addOne(apiObject: ApiObject) {
+        transaction {
+            InputObject.new {
+                tag = apiObject.tag
+                probability = apiObject.probability
+            }
+        }
+    }
+
+    override suspend fun getAllResultObjects(): List<ApiObject> = dbQuery {
+        InputObjects.selectAll().map { toResultObject(it) }
+    }
+
+    override suspend fun getResultObjectbyTag(tag: String): ApiObject? = dbQuery {
+        InputObjects.select {
+            (InputObjects.tag eq tag)
+        }.mapNotNull { toResultObject(it) }
+            .singleOrNull()
+    }
+
+    override suspend fun getResultObjectbyDate(date: LocalDate): List<ApiObject>? = dbQuery {
+        InputObjects.select {
+            (InputObjects.date eq date)
+        }.mapNotNull { toResultObject(it) }
+    }
+
+    override suspend fun getResultObjectbeforeDate(date: LocalDate): List<ApiObject>? = dbQuery {
+        InputObjects.select {
+            (InputObjects.date less  date)
+        }.mapNotNull { toResultObject(it) }
+    }
+
+    override suspend fun getResultObjectafterDate(date: LocalDate): List<ApiObject>? = dbQuery {
+        InputObjects.select {
+            (InputObjects.date greater  date)
+        }.mapNotNull { toResultObject(it) }
+    }
+
+    override suspend fun getResultObjecGreaterthanProbability(probability: Double): List<ApiObject>? = dbQuery {
+        InputObjects.select {
+            (InputObjects.probability greater  probability)
+        }.mapNotNull { toResultObject(it) }
+    }
+
+    override suspend fun getResultObjecLessthanProbability(probability: Double): List<ApiObject>? = dbQuery {
+        InputObjects.select {
+            (InputObjects.probability less  probability)
+        }.mapNotNull { toResultObject(it) }
+    }
+
+    override suspend fun getResultObjecEqualsProbability(probability: Double): List<ApiObject>? = dbQuery {
+        InputObjects.select {
+            (InputObjects.probability eq  probability)
+        }.mapNotNull { toResultObject(it) }
+    }
+
+    private fun toResultObject(row: ResultRow): ApiObject =
+        ApiObject(
+            tag = row[InputObjects.tag],
+            probability = row[InputObjects.probability]
+        )
+}

src/di/InjectionModule.kt

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+package com.kmalbz.di
+
+import com.kmalbz.database.service.IInputObjectService
+import com.kmalbz.database.service.InputObjectService
+import org.koin.dsl.module
+import org.koin.experimental.builder.singleBy
+
+val injectionModule = module(createdAtStart = true) {
+    singleBy<IInputObjectService,InputObjectService>()
+}