Added samples mentioned in a lab

Author: svtk

src/contributors/Logger.kt

@@ -6,14 +6,6 @@ import retrofit2.Response
 
 val log: Logger = LoggerFactory.getLogger("Contributors")
 
-/*fun logRepos(req: RequestData, repos: List<Repo>) {
-    log.info("${req.org}: loaded ${repos.size} repos")
-}
-
-fun logUsers(repo: Repo, users: List<User>) {
-    log.info("${repo.name}: loaded ${users.size} contributors")
-}*/
-
 fun log(msg: String?) {
     log.info(msg)
 }

src/samples/ChannelsSample.kt

@@ -0,0 +1,23 @@
+package samples
+
+import kotlinx.coroutines.channels.Channel
+import kotlinx.coroutines.*
+
+fun main() = runBlocking<Unit> {
+    val channel = Channel<String>()
+    launch {
+        channel.send("A1")
+        channel.send("A2")
+        log("A done")
+    }
+    launch {
+        channel.send("B1")
+        log("B done")
+    }
+    launch {
+        repeat(3) {
+            val x = channel.receive()
+            log(x)
+        }
+    }
+}

src/samples/ConcurrencySample.kt

@@ -0,0 +1,18 @@
+package samples
+
+import kotlinx.coroutines.*
+
+fun main() = runBlocking {
+    val deferred: Deferred<Int> = async(Dispatchers.Default) {
+        loadData()
+    }
+    log("waiting...")
+    log(deferred.await())
+}
+
+suspend fun loadData(): Int {
+    log("loading...")
+    delay(1000L)
+    log("loaded!")
+    return 42
+}

src/samples/SamplesLogger.kt

@@ -0,0 +1,10 @@
+package samples
+
+import org.slf4j.Logger
+import org.slf4j.LoggerFactory
+
+val log: Logger = LoggerFactory.getLogger("Samples")
+
+fun log(msg: Any?) {
+    log.info(msg.toString())
+}