Kotlin refactor

sleet-api-service/src/main/java/com/sleet/api/Constants.kt

@@ -17,8 +17,9 @@ object Constants {
     const val CLIENT_ID = "client_id"
     const val CODE = "code"
     const val CONTENT_TYPE = "Content-Type"
-    const val DEFAULT_TIMEOUT_MILLIS = 5000
+    const val DEFAULT_TIMEOUT_MILLIS = 5000L
     const val DEFAULT_STRIKE_COUNT = "100"
+    const val DEFAULT_REDIRECT_URI = "https://127.0.0.1"
     const val EQUALS = '='
     const val GRANT_TYPE = "grant_type"
     const val MARKETDATA = "marketdata"

sleet-api-service/src/main/java/com/sleet/api/RequestUtil.kt

@@ -0,0 +1,43 @@
+package com.sleet.api
+
+import org.asynchttpclient.Request
+import org.asynchttpclient.RequestBuilder
+
+class RequestUtil {
+
+    companion object {
+
+        /**
+         * Create a [Request] for GET methods
+         *
+         * @param url          to send a GET request
+         * @param headerParams to add to request
+         * @return a [Request] to fire with the http client
+         */
+        @JvmStatic
+        fun createGetRequest(url: String, headerParams: Map<String, String>?): Request? {
+            val requestBuilder = RequestBuilder("GET").setUrl(url)
+            headerParams?.forEach { (name: String, value: String) ->
+                requestBuilder.setHeader(name, value)
+            }
+            return requestBuilder.build()
+        }
+
+        /**
+         * Create a [Request] for POST methods
+         *
+         * @param url          to send a POST request
+         * @param body         to send in request
+         * @param headerParams to add to request
+         * @return a [Request] to fire with the http client
+         */
+        @JvmStatic
+        fun createPostRequest(url: String, body: String, headerParams: Map<String, String>?): Request? {
+            val requestBuilder = RequestBuilder("POST").setUrl(url).setBody(body)
+            headerParams?.forEach { (name: String, value: String) ->
+                requestBuilder.setHeader(name, value)
+            }
+            return requestBuilder.build()
+        }
+    }
+}

sleet-api-service/src/main/java/com/sleet/api/TDClient.kt

@@ -0,0 +1,28 @@
+package com.sleet.api
+
+import com.sleet.api.Constants.DEFAULT_REDIRECT_URI
+import com.sleet.api.Constants.DEFAULT_TIMEOUT_MILLIS
+import com.sleet.api.service.AuthService
+import com.sleet.api.service.QuoteService
+import com.sleet.api.service.TradingService
+import org.asynchttpclient.AsyncHttpClient
+import org.asynchttpclient.Dsl
+
+/**
+ * Client interface to TD Ameritrade's API with sub-services grouped by common functionalities
+ *
+ * @author mautomic
+ */
+class TDClient @JvmOverloads constructor(apiKey: String, redirectUri: String = DEFAULT_REDIRECT_URI) {
+
+    private val httpClient: AsyncHttpClient =
+        Dsl.asyncHttpClient(
+            Dsl.config()
+                .setReadTimeout(DEFAULT_TIMEOUT_MILLIS.toInt())
+                .setConnectTimeout(DEFAULT_TIMEOUT_MILLIS.toInt())
+        )
+
+    val authenticator: AuthService = AuthService(apiKey, redirectUri, httpClient)
+    val trader: TradingService = TradingService(httpClient)
+    val quoter: QuoteService = QuoteService(apiKey, httpClient)
+}