Added java version of library

Author: Gurgen

app/build.gradle

@@ -26,5 +26,5 @@ dependencies {
     implementation 'com.android.support.constraint:constraint-layout:1.0.2'
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jre7:$kotlin_version"
     implementation 'com.google.code.gson:gson:2.8.1'
-    implementation project(path: ':dotnetcoresignalrclient')
+    implementation project(path: ':dotnetcoresignalrclientjava')
 }

app/src/main/java/com/smartarmenia/websocketclient/MainActivity.kt

@@ -4,7 +4,7 @@ import android.os.Bundle
 import android.support.v7.app.AppCompatActivity
 import android.widget.Toast
 import com.google.gson.Gson
-import com.smartarmenia.dotnetcoresignalrclient.*
+import com.smartarmenia.dotnetcoresignalrclientjava.*
 import kotlinx.android.synthetic.main.activity_main.*
 
 
@@ -29,7 +29,7 @@ class MainActivity : AppCompatActivity(), HubConnectionListener, HubEventListene
 
     }
 
-    private val connection: HubConnection = WebSocketHubConnection("http://192.168.0.109:5002/signalr/hubs/auth")
+    private val connection: HubConnection = WebSocketHubConnection("http://192.168.0.104:5002/signalr/hubs/auth")
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)

dotnetcoresignalrclient/src/main/java/com/smartarmenia/dotnetcoresignalrclient/WebSocketHubConnection.kt

@@ -15,7 +15,6 @@ import java.net.HttpURLConnection
 import java.net.URI
 import java.net.URL
 import java.util.*
-import javax.net.ssl.HttpsURLConnection
 
 class WebSocketHubConnection(private val hubUrl: String) : HubConnection {
     companion object {
@@ -27,25 +26,25 @@ class WebSocketHubConnection(private val hubUrl: String) : HubConnection {
     private val listeners = mutableListOf<HubConnectionListener>()
     private val eventListeners = mutableMapOf<String, MutableList<HubEventListener>>()
     private val parsedUri = Uri.parse(hubUrl)
+    private val gson = Gson()
 
     override fun connect(authHeader: String?) {
         Log.i(TAG, "Requesting connection id...")
-        val connection: HttpURLConnection = when {
-            parsedUri.scheme == "http" -> URL(hubUrl).openConnection() as HttpURLConnection
-            parsedUri.scheme == "https" -> URL(hubUrl).openConnection() as HttpsURLConnection
-            else -> throw RuntimeException("URL must start with http or https")
-        }
+        if (!(parsedUri.scheme == "http" || parsedUri.scheme == "https"))
+            throw RuntimeException("URL must start with http or https")
+
+        val connection: HttpURLConnection = URL(hubUrl).openConnection() as HttpURLConnection
         if (authHeader != null) {
             connection.addRequestProperty("Authorization", authHeader)
         }
         connection.connectTimeout = 15000
-        connection.connectTimeout = 15000
+        connection.readTimeout = 15000
         connection.requestMethod = "OPTIONS"
         val responseCode = connection.responseCode
         when (responseCode) {
             200 -> {
                 val result = InputStreamConverter.convert(connection.inputStream)
-                val jsonElement = Gson().fromJson<JsonElement>(result, JsonElement::class.java)
+                val jsonElement = gson.fromJson<JsonElement>(result, JsonElement::class.java)
                 val connectionId = jsonElement.asJsonObject.get("connectionId").asString
                 if (!jsonElement.asJsonObject.get("availableTransports").asJsonArray.toList().map { it.asString }.contains("WebSockets")) {
                     throw RuntimeException("The server does not support WebSockets transport")
@@ -60,7 +59,7 @@ class WebSocketHubConnection(private val hubUrl: String) : HubConnection {
     private fun connectClient(connectionId: String?, authHeader: String?) {
         val uriBuilder = parsedUri.buildUpon()
         uriBuilder.appendQueryParameter("id", connectionId)
-        uriBuilder.scheme(if (parsedUri.scheme == "http") "ws" else "wss")
+        uriBuilder.scheme(parsedUri.scheme.replace("http", "ws"))
         val uri = uriBuilder.build()
         val headers = if (authHeader == null) null else mapOf("Authorization" to authHeader)
         client = object : WebSocketClient(URI(uri.toString()), Draft_6455(), headers, 15000) {
@@ -72,7 +71,7 @@ class WebSocketHubConnection(private val hubUrl: String) : HubConnection {
 
             override fun onMessage(s: String) {
                 Log.i(TAG, s)
-                val element = Gson().fromJson<SignalRMessage>(s.replace(SPECIAL_SYMBOL, ""), SignalRMessage::class.java)
+                val element = gson.fromJson<SignalRMessage>(s.replace(SPECIAL_SYMBOL, ""), SignalRMessage::class.java)
                 if (element.type == 1) {
                     val message = HubMessage(element.invocationId!!, element.target!!, element.arguments!!)
                     listeners.forEach { it.onMessage(message) }
@@ -81,7 +80,7 @@ class WebSocketHubConnection(private val hubUrl: String) : HubConnection {
             }
 
             override fun onClose(i: Int, s: String, b: Boolean) {
-                Log.i(TAG, "Closed. Code: $i, $s, $b")
+                Log.i(TAG, "Closed. Code: $i, Reason: $s, Remote: $b")
                 listeners.forEach { it.onDisconnected() }
             }
 
@@ -121,7 +120,7 @@ class WebSocketHubConnection(private val hubUrl: String) : HubConnection {
 
     override fun invoke(event: String, vararg parameters: Any) {
         val map = mapOf("type" to 1, "invocationId" to UUID.randomUUID().toString(), "target" to event, "arguments" to parameters, "nonblocking" to false)
-        client.send(Gson().toJson(map) + SPECIAL_SYMBOL)
+        client.send(gson.toJson(map) + SPECIAL_SYMBOL)
     }
 
     override fun addListener(listener: HubConnectionListener) {

dotnetcoresignalrclientjava/.gitignore

@@ -0,0 +1 @@
+/build

dotnetcoresignalrclientjava/build.gradle

@@ -0,0 +1,29 @@
+apply plugin: 'com.android.library'
+
+android {
+    compileSdkVersion 26
+    buildToolsVersion "26.0.1"
+
+
+    defaultConfig {
+        minSdkVersion 16
+        targetSdkVersion 26
+        versionCode 1
+        versionName "1.0"
+
+    }
+
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
+        }
+    }
+
+}
+
+dependencies {
+    implementation fileTree(dir: 'libs', include: ['*.jar'])
+    implementation 'org.java-websocket:Java-WebSocket:1.3.4'
+    implementation 'com.google.code.gson:gson:2.8.1'
+}

dotnetcoresignalrclientjava/proguard-rules.pro

@@ -0,0 +1,21 @@
+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile

dotnetcoresignalrclientjava/src/main/AndroidManifest.xml

@@ -0,0 +1,2 @@
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.smartarmenia.dotnetcoresignalrclientjava" />

dotnetcoresignalrclientjava/src/main/java/com/smartarmenia/dotnetcoresignalrclientjava/HubConnection.java

@@ -0,0 +1,17 @@
+package com.smartarmenia.dotnetcoresignalrclientjava;
+
+public interface HubConnection {
+    void connect(String authHeader);
+
+    void disconnect();
+
+    void addListener(HubConnectionListener listener);
+
+    void removeListener(HubConnectionListener listener);
+
+    void subscribeToEvent(String eventName, HubEventListener eventListener);
+
+    void unSubscribeFromEvent(String eventName, HubEventListener eventListener);
+
+    void invoke(String event, Object... parameters);
+}

dotnetcoresignalrclientjava/src/main/java/com/smartarmenia/dotnetcoresignalrclientjava/HubConnectionListener.java

@@ -0,0 +1,11 @@
+package com.smartarmenia.dotnetcoresignalrclientjava;
+
+public interface HubConnectionListener {
+    void onConnected();
+
+    void onDisconnected();
+
+    void onMessage(HubMessage message);
+
+    void onError(Exception exception);
+}

dotnetcoresignalrclientjava/src/main/java/com/smartarmenia/dotnetcoresignalrclientjava/HubEventListener.java

@@ -0,0 +1,5 @@
+package com.smartarmenia.dotnetcoresignalrclientjava;
+
+public interface HubEventListener {
+    void onEventMessage(HubMessage message);
+}