Fixes gh-271, fixes gh-272

This was kind of ugly, and caused a static usage of the eureka
DiscoveryCLient to become necessary again, just so the @Bean that is
provided for the user stays accurate (it has to be the one in the main
application context, even if the parent boot strap has different
instance metadata).

I tested with a vanilla Eureka server and config server, and used the
client in tests/eureka-first.

Fixes gh-268

Fixes gh-274

Added a LocalApplicationHealthCheckHandler that checks the local app and sends the appropriate status to eureka.

fixes gh-251

removes ugly dagger dependency

fixes gh-183

updated documentation of HystrixHealthIndicator

documentation was not conform to specified behavior as in #24

Simple solution is to check for instanceof before casting.

Fixes gh-265

This change adds more data to the stream with {"type":"Ping"}
so (I believe) the existing dashboard client will discard it,
but stay alive.

Fixes gh-264

Since hostnames ahve quite strict syntax (e.g. no underscores) we should
validate the feign client name to prevent nasty surprises at runtime.

Fixes gh-263

fixes gh-260

Fixes gh-259

Added additional Gradle tip to Eureka Server documentation.

Added additional Gradle tip to Eureka Server documentation. Tip covers the usage of the spring dependency management plugin in order to prevent fatal crashes during application startup.

It turns out that the suckiness of Zuul with multipart requests
comes almost entirely from the Multipart handling in Spring's
DispatcherServlet. This change makes the proxy routes available
on an alternative path /zuul/<normal_path> (where
/zuul is the default value of zuul.servletPath). I have
tested those with 800MB file uploads using the main method in
the FormZuulServletProxyApplicationTests and the main
observation is that there is no OutOfMemory error (no-one tries
to download the complete request body). It works with Ribbon
and with the simple (HttpClient) filter. With Ribbon you
will need to set some timeouts if you want to upload files
as large as that, e.g. see application.yml in the tests:

hystrix.command.default.execution.isolation.thread.timeoutInMilliseconds: 60000
ribbon:
  ConnectTimeout: 3000
  ReadTimeout: 60000

You need to set "Transfer-Encoding: chunked" in the
incoming request. Chrome does not do this by default
apparently, but I was able to test with curl, e.g.

$ curl -v -H "Transfer-Encoding: chunked" \
  -F "file=@mylarg.iso" \
  localhost:9999/zuul/direct/file

The old proxy paths through the DispatcherServlet are still
available (for backwards compatibility and for convenience of
having the paths available at the root of the context path).

Fixes gh-254

Because of the way that a FormBodyServletRequestWrapper was
implemented (extending the Zuul servlet 2.5 wrapper) it could
barf at runtime if anyone called its servlet 3.0 methods. The fix
for that was to extract our Servlet30RequestWrapper and extend that
instead.

Also tweaked the DebugFilter a bit so it doesn't try and display
the whole payload. Probably speeds up file uploads a bit but the
fact that we have to store the whole request body in memory is
going to kill us eventually.

See gh-254

From 2.0.RC13

fixes gh-216

fixes gh-240

fixes gh-243

fixes gh-242

fixes gh-236

If you are using AMQP there needs to be a ConnectionFactory (from
Spring Rabbit) in the application context. If there is a single
ConnectionFactory it will be used, or if there is a one qualified as
@[Hystrix,Turbine]ConnectionFactory it will be preferred over others,
otherwise the @Primary one will be used. If there are multiple
unqualified connection factories there will be an error.

See https://github.com/spring-cloud/spring-cloud-bus/issues/13

It didn't depend on Ribbon at all so it can live in the commons
project.

Listen for heartbeats from discovery so that state changes can trigger
a new status (and the client doesn't rely on the old address of the
server if it has now changed).

Fixes gh-232