+doc add missing migration parts to java documentation

akka-docs/rst/java/code/docs/stream/io/StreamTcpDocTest.java

@@ -79,7 +79,7 @@ public class StreamTcpDocTest extends AbstractJavaTest {
         System.out.println("New connection from: " + connection.remoteAddress());
 
         final Flow<ByteString, ByteString, NotUsed> echo = Flow.of(ByteString.class)
-          .via(Framing.delimiter(ByteString.fromString("\n"), 256, false))
+          .via(Framing.delimiter(ByteString.fromString("\n"), 256, FramingTruncation.DISALLOW))
           .map(ByteString::utf8String)
           .map(s -> s + "!!!\n")
           .map(ByteString::fromString);
@@ -113,7 +113,7 @@ public class StreamTcpDocTest extends AbstractJavaTest {
       final Source<String, NotUsed> welcome = Source.single(welcomeMsg);
       final Flow<ByteString, ByteString, NotUsed> serverLogic =
           Flow.of(ByteString.class)
-            .via(Framing.delimiter(ByteString.fromString("\n"), 256, false))
+            .via(Framing.delimiter(ByteString.fromString("\n"), 256, FramingTruncation.DISALLOW))
             .map(ByteString::utf8String)
             //#welcome-banner-chat-server
             .map(command -> {
@@ -149,7 +149,7 @@ public class StreamTcpDocTest extends AbstractJavaTest {
             .map(elem -> ByteString.fromString(elem + "\n"));
 
       final Flow<ByteString, ByteString, NotUsed> repl = Flow.of(ByteString.class)
-        .via(Framing.delimiter(ByteString.fromString("\n"), 256, false))
+        .via(Framing.delimiter(ByteString.fromString("\n"), 256, FramingTruncation.DISALLOW))
         .map(ByteString::utf8String)
         .map(text -> {System.out.println("Server: " + text); return "next";})
         .map(elem -> readLine("> "))

akka-docs/rst/java/code/docs/stream/javadsl/cookbook/RecipeParseLines.java

@@ -8,6 +8,7 @@ import akka.actor.ActorSystem;
 import akka.stream.ActorMaterializer;
 import akka.stream.Materializer;
 import akka.stream.javadsl.Framing;
+import akka.stream.javadsl.FramingTruncation;
 import akka.stream.javadsl.Sink;
 import akka.stream.javadsl.Source;
 import akka.testkit.JavaTestKit;
@@ -48,7 +49,7 @@ public class RecipeParseLines extends RecipeTest {
 
     //#parse-lines
     final Source<String, NotUsed> lines = rawData
-      .via(Framing.delimiter(ByteString.fromString("\r\n"), 100, true))
+      .via(Framing.delimiter(ByteString.fromString("\r\n"), 100, FramingTruncation.ALLOW))
       .map(b -> b.utf8String());
     //#parse-lines
     lines.limit(10).runWith(Sink.seq(), mat).toCompletableFuture().get(1, TimeUnit.SECONDS);

akka-docs/rst/java/stream/migration-guide-2.0-2.4-java.rst

@@ -185,3 +185,39 @@ The old behaviour can be achieved by explicitly draining the entity:
 
    response.entity().getDataBytes().runWith(Sink.ignore())
 
+
+Websocket now consistently named WebSocket
+------------------------------------------
+
+Previously we had a mix of methods and classes called ``websocket`` or ``Websocket``, which was in contradiction with
+how the word is spelled in the spec and some other places of Akka HTTP.
+
+Methods and classes using the word WebSocket now consistently use it as ``WebSocket``, so updating is as simple as
+find-and-replacing the lower-case ``s`` to an upper-case ``S`` wherever the word WebSocket appeared.
+
+Java DSL for Http binding and connections changed
+-------------------------------------------------
+
+In order to minimise the number of needed overloads for each method defined on the ``Http`` extension
+a new mini-DSL has been introduced for connecting to hosts given a hostname, port and optional ``ConnectionContext``.
+
+The availability of the connection context (if it's set to ``HttpsConnectionContext``) makes the server be bound
+as an HTTPS server, and for outgoing connections those settings are used instead of the default ones if provided.
+
+Was::
+
+    http.cachedHostConnectionPool(toHost("akka.io"), materializer());
+    http.cachedHostConnectionPool("akka.io", 80, httpsConnectionContext, materializer()); // does not work anymore
+
+Replace with::
+
+    http.cachedHostConnectionPool(toHostHttps("akka.io", 8081), materializer());
+    http.cachedHostConnectionPool(toHostHttps("akka.io", 8081).withCustomHttpsContext(httpsContext), materializer());
+
+
+Framing moved to akka.stream.[javadsl/scaladsl]
+-----------------------------------------------
+
+The ``Framing`` object which can be used to chunk up ``ByteString`` streams into
+framing dependent chunks (such as lines) has moved to ``akka.stream.scaladsl.Framing``,
+and has gotten a Java DSL equivalent type in ``akka.stream.javadsl.Framing``.

akka-docs/rst/scala/code/docs/http/scaladsl/server/FileUploadExamplesSpec.scala

@@ -8,7 +8,7 @@ import java.io.File
 import akka.Done
 import akka.actor.ActorRef
 import akka.http.scaladsl.model.Multipart.FormData.BodyPart
-import akka.stream.io.{ Framing }
+import akka.stream.scaladsl.Framing
 import akka.stream.scaladsl._
 import akka.http.scaladsl.model.Multipart
 import akka.util.ByteString