pekko/akka-docs/rst/java/http/routing-dsl/directives/marshalling-directives/completeWith.rst
Johan Andrén 29029be31d !htp #18919 #19519 New JavaDSL for Akka HTTP (#20518)
* !htt #18919 #19519 Align Java HTTP server DSL with Scala

This commits replaces the Java HTTP server DSL with a Java-8 centric one
which exposes all scala DSL concepts to be usable from Java, including
custom directives, (un)marshallers, rejections, headers, and type safety
for path and query parameters.

* Add RequestContext and RouteResult to Java DSL
fix websockets
WIP bring java docs up to date.
This applies some updates to the root-level documentation

* [htp] Fix java documentation to correctly mention timeouts

Timeouts are configured the same in Java and Scala. Hence, linking to the
scala docs for timeouts from Java.

* =htc fix optionalHeaderValueByType in Java

* =htt #20200 fix java testkit always using NoLogging instead logger

* +htt actually run new javadsl tests, allow overriding config

* =htt improve javadsl test infra with more details when fails

* =htt fix bug in wrong path matcher exposed

* +htp add missing remaining path matcher

* =htp Java DSL cookie tests fixed

* =htt Java DSL ParameterDirectivesTest fixed

Protect the tweets from scalariform

Incorrect response expectations in cache condition directives spec fixed

* =htt Path directives for Java DSL

* +!htt PathMatchers rewritten, made uniform and tests passing

* Bugfix in java reject and a little test-boyscouting

* Revert "Incorrect response expectations in cache condition directives spec fixed"

This reverts commit cd50e89d45db010309f8249b090ea654ebb11c7a.

* +htc HttpAPIsTest is compile time only, not for running
Also, moved from the client package since not strictly a client test.

SecurityDirectives passing

Two faulty tests and two actual bugs.

Fix for cache condition spec not working

* Not sending in Unit instad of the implicit magnet in the test
* HeaderMagnet now works as expected
* Java API added for - and + on DateTime

PetStore example and test fixed

* Annotations to make marshalling work without default constructor
* Made model class immutable

Incorrect tests fixed

Some scaladoc boyscouting as bonus

* =htt RequestValTest sprinkled out across multiple directive tests

Client ip extraction test with incorrect header name fixed.

* =htt Incorrect CodingDirectivesTest fixed.

* =htt Bugfix for Java Unmarshaller.firstOf and fixes to JavaRouteTest

* =htt MarshallerTest fixed

* Missing seal signature added to JavaDSL
* More consistent (with Scala) test kit setup for Java
* missing Javadocs added
* Thread.sleep in default exception handler removed

* =htt copy directive docs, prepare for finishing it up

* +htt SecurityDirectives.authorize variants and test coverage added

* +htt Custom headers in Java DSL

* =htt WIP on java docs

* +htp add missing parameterOrDefault directive
Fixed a lot of doc warnings

* =htc intense progress on javadsl docs

* =htc #20470 Link to issue about docs and fix compile error
compile, migration guide
don't mima check http-experimental

* =htt Java DSL doc warnings fixed.
Only `Could not lex literal_block` ones left now

* =htc fix mima settings

* =doc fix MethodDirectives doc test with custom method

* =htc fix coding directives spec after bad merge

* =htc fix concat being corresponding to route() in javadsl

* =htt Disable consistency check for route/concat as it fails only on ci server

* !htt Minor fixes to PathMatchers
2016-05-16 10:38:40 +02:00

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.. _-completeWith-java-:
completeWith
============
Description
-----------
Uses the marshaller for a given type to produce a completion function that is passed to its
inner route. You can use it to decouple marshaller resolution from request completion.
The ``completeWith`` directive works in conjuction with ``instanceOf`` and ``spray.httpx.marshalling``
to convert higher-level (object) structure into some lower-level serialized "wire format".
:ref:`The marshalling documentation <http-marshalling-java>` explains this process in detail.
This directive simplifies exposing types to clients via a route while providing some
form of access to the current context.
``completeWith`` is similar to ``handleWith``. The main difference is with ``completeWith`` you must eventually call
the completion function generated by ``completeWith``. ``handleWith`` will automatically call ``complete`` when the
``handleWith`` function returns.
Examples
--------
The following example uses ``spray-json`` to marshall a simple ``Person`` class to a json
response. It utilizes ``SprayJsonSupport`` via the ``PersonJsonSupport`` object as the in-scope
unmarshaller.
TODO: Add example snippets
The ``findPerson`` takes an argument of type ``Person => Unit`` which is generated by the ``completeWith``
call. We can handle any logic we want in ``findPerson`` and call our completion function to
complete the request.
TODO: Example snippets for JavaDSL are subject to community contributions! Help us complete the docs, read more about it here: `write example snippets for Akka HTTP Java DSL #20466 <https://github.com/akka/akka/issues/20466>`_.