gRPC Java 0.15.0 released

[Carl Mastrangelo]

Major Changes

• significant performance improvements around header processing
  
• generated AbstractService classes are now deprecated in favor of ServiceImplBase
  
• made Context is no longer experimental (#1705)
  

Generated Code / Stub

• static bindService() method is deprecated
  
• added ClientResponseObsever to interact with advanced features like flow-control
  

Core

• renamed withCredentials to withCallCredentials on CallOptions
  
• improved error messages when unable to find a name resolver
  
• fix onReady race by adding DelayedStreamListener
  
• added a RoundRobin Loadbalancer
  
• clarified and extended core documentation (#1479, #714, #986, #1962, #1805)
  
• fix race with exception in onMessage and onCompleted (#1652)
  
• made ServiceDescriptor final, and now accepts a collection of methods.
  
• made ServerInterceptor, BindableService, ServerCallHandler non experimental (#1711, #1701)
  
• promoted Deadline API no longer be experimental 
  
• added a NameResolverProvider
  
• remove deprecated ClientCall.cancel overload
  
• new client calls no longer get their a new context (fixes a stack overflow, #1926)
  
• made CallOptions accept custom values
  
• enable per-message compression by default, if a compression method is set.
  
• added a fail-fast feature, which makes new RPCs fail if there are no connections
  
• added CallOptions.waitForReady to support fail-fast 
  
• log exceptions from scheduled tasks (#1759)
  
• implemented ManagedChannel.shutdownNow (#448)
  
• made URI parsing for targets more robust (#1883)
  
• increased visibility of Code.status() and Status.fromCode (#1722)
  
• methodDescriptor argument moved from ServerInterceptor to ServerCall
  
• added a health checking service (not on by default) (#647)
  
• server call exception is saved when a message fails to close
  
• status exceptions can now hold additional metadata
  
• allow ClientCall.cancel before start. Fixes #1536
  
• split HandlerRegistry into an immutable default and a fallback for dynamic dispatch
  
• made Context.fork return a normal Context instead of CancellableContext (1626)
  
• reduced memory usage when cancelling calls by using the right executor
  

Examples

• stopped using deprecated generated classes
  
• added examples to show how to get error information from different stubs
  
• switch android example to use proto lite instead of nano proto
  
• moved json encoding examples to the "advanced" package (#1778)
  

Auth

• added a CallCredentials class for propagating credentials
  
• promote OAuth2 service accounts to JWT (#785)
  
• add MoreCallCredentials.from(Credentials) to work with the Google Auth Library
  
• made ClientAuthInterceptor deprecated 
  
• handle null metadata for Credentials
  

Netty

• fixed a bug when headers could get corrupted during decoding
  
• use boringssl uberjar
  
• detect when ALPN was not used. (#522)
  
• add tests for Netty bug where a channel would break after a RST_STREAM frame (#1682)
  
• added Trailiers to the Status for BlockingResponseStream (#1861)
  
• call transportShutdown immediately on ID exhaustion (#1819)
  

Protobuf

• bump dependency to 3.0.0-beta-3
  

OkHttp

• fix NPE when using CLEARTEXT connectionSpec (#1815)
  

Other

• deflake lots of tests bsed on finding an empty port
  
• disable flaky test in ClientCallsTest
  
• improve ClientCall test to fail more obviously
  
• add test for MessageDeframer closed exception (#1795) 
  
• benchmark transport flag now works in AsyncClient
  
• always set message encoding in headers, even for the "identy" encoding.
  
• updated error codes returned to match the specification (#1605)
  
• added a log message for unknown client streams
  
• added more detail when recieving  GOAWAY
  
• cause removed from InProcessTransport (#1716)
  
• setRemoveOnCancelPolicy
  

[Wang Tao]

great job!