Commit Graph

1518 Commits

Author SHA1 Message Date
Norman Maurer
195d7476d5 Deprecate methods in AbstractChannel that have no real usage.
Motivation:

We should deprecate methods that are not used.

Modifications:

Add @Deprecated to methods

Result:

Be able to cleanup stuff sooner.
2016-07-07 06:41:43 +02:00
buchgr
0fbb791ad6 Make AbstractChannel.outboundBuffer volatile.
Motivation:

The field can be read from arbitrary threads via Channel.(isWritable()|bytesBeforeWritable()|bytesBeforeUnwritable()), WriteAndFlushTask.newInstance(), PendingWriteQueue, etc.

Modifications:

Make AbstractChannel.outboundBuffer volatile.

Result:

More correct in a concurrent use case.
2016-07-06 21:25:33 +02:00
Norman Maurer
44b942e507 Rename future to promise in the ChannelDuplexHandler method arguments.
Motivation:

We used future in many method of ChannelDuplexHandler as argument name of ChannelPromise. We should make it more consistent and correct.

Modifications:

Replace future with promise.

Result:

More correct and consistent naming.
2016-07-06 08:55:29 +02:00
Norman Maurer
731f52fdf7 Allow to inject RejectedExecutionHandler for different EventLoops and EventExecutors
Motiviation:

Sometimes it is useful to allow to specify a custom strategy to handle rejected tasks. For example if someone tries to add tasks from outside the eventloop it may make sense to try to backoff and retries and so give the executor time to recover.

Modification:

Add RejectedEventExecutor interface and implementations and allow to inject it.

Result:

More flexible handling of executor overload.
2016-06-24 17:08:30 +02:00
Norman Maurer
a0d4fb16fc Allow to set max capacity for task queue for EventExecutors and EventLoops
Motivation:

To restrict the memory usage of a system it is sometimes needed to adjust the number of max pending tasks in the tasks queue.

Modifications:

- Add new constructors to modify the number of allowed pending tasks.
- Add system properties to configure the default values.

Result:

More flexible configuration.
2016-06-24 14:00:50 +02:00
Norman Maurer
278c36af0c Merge ThrowableUtils into ThrowableUtil.
Motivation:

We should merge ThrowableUtils into ThrowableUtil as this name is more consistent with the naming of utility classes in netty.

Modifications:

Merge classes.

Result:

More consistent naming
2016-06-23 10:05:41 +02:00
Tim Brooks
d964bf6f18 Remove usages of deprecated methods group() and childGroup().
Motivation:

These methods were recently deprecated. However, they remained in use in several locations in Netty's codebase.

Modifications:

Netty's code will now access the bootstrap config to get the group or child group.

Result:

No impact on functionality.
2016-06-21 14:06:57 +02:00
Norman Maurer
31e0ac1d22 Expose the SelectorProvider used by the NioEventLoop
Motivation:

If a user writes an own nio based transport which uses a special SelectorProvider it is useful to be able to get the SelectorProvider that is used by a NioEventLoop. This way this can be used when implement AbstractChannel.isCompatible(...) and check that the SelectorProvider is the correct one.

Modifications:

Expose the SelectorProvider.

Result:

Be able to get the SelectorProvider used by a NioEventLoop.
2016-06-21 14:05:44 +02:00
Norman Maurer
e845670043 Set some StackTraceElement on pre-instantiated static exceptions
Motivation:

We use pre-instantiated exceptions in various places for performance reasons. These exceptions don't include a stacktrace which makes it hard to know where the exception was thrown. This is especially true as we use the same exception type (for example ChannelClosedException) in different places. Setting some StackTraceElements will provide more context as to where these exceptions original and make debugging easier.

Modifications:

Set a generated StackTraceElement on these pre-instantiated exceptions which at least contains the origin class and method name. The filename and linenumber are specified as unkown (as stated in the javadocs of StackTraceElement).

Result:

Easier to find the origin of a pre-instantiated exception.
2016-06-20 11:33:05 +02:00
Norman Maurer
8f3a5e5b18 Fix typo in log message
Motivation:

We had a typo in the log message.

Modifications:

Remove extra "s" in log message.

Result:

Correct spelling in log message.
2016-06-17 06:23:00 +02:00
Norman Maurer
418550914a Log Selector instance when Selector needs to be rebuild
Motivation:

To better debug why a Selector need to be rebuild it is useful to also log the instance of the Selector.

Modifications:

Add logger instance to the log message.

Result:

More useful log message.
2016-06-17 06:19:23 +02:00
Stephane Landelle
9bfeab2c8a AbstractBootstrap can crash instead of failing promise, close #5387
Motivation:
When `ChannelFactory#newChannel` crashed, `AbstractBootstrap#initAndRegister` propagates the exception to the caller instead of failing the promise.

Modifications:
- Catch exceptions from `ChannelFactory#newChannel`.
- Notify promise of such failure.

Result:
`AbstractBootstrap` gracefully handles connect failures.
2016-06-13 18:59:09 +02:00
Dmitry Spikhalskiy
428c61673b Logs in invokeExceptionCaught have been made consistent and full
Motivation:

In case of exception in invokeExceptionCaught() only original exception passed to invokeExceptionCaught() will be logged on any log level.
+ AbstractChannelHandlerContext and CombinedChannelDuplexHandler log different exceptions.

Modifications:

Fix inconsistent logging code and add ability to see both stacktraces on DEBUG level.

Result:

Both handlers log now both original exception and thrown from invokeExceptionCaught. To see full stacktrace of exception thrown from invokeExceptionCaught DEBUG log level must be enabled.
2016-06-11 20:11:11 +02:00
Guido Medina
c3abb9146e Use shaded dependency on JCTools instead of copy and paste
Motivation:
JCTools supports both non-unsafe, unsafe versions of queues and JDK6 which allows us to shade the library in netty-common allowing it to stay "zero dependency".

Modifications:
- Remove copy paste JCTools code and shade the library (dependencies that are shaded should be removed from the <dependencies> section of the generated POM).
- Remove usage of OneTimeTask and remove it all together.

Result:
Less code to maintain and easier to update JCTools and less GC pressure as the queue implementation nt creates so much garbage
2016-06-10 13:19:45 +02:00
Jon Chambers
829be86223 Use a default resolver with bootstrap.resolver(null).
Motivation:

`Bootstrap` has a notion of a default resolver group, but it's hidden from the public. To allow callers to reset a `Bootstrap` instance's resolver group, we could either make `DEFAULT_RESOLVER` public, or we could allow callers to pass `null` as an argument to `Bootstrap#resolver(AddressResolverGroup<?>)`. This pull request does the latter.

Modifications:

- Allow `Bootstrap#resolver(AddressResolverGroup<?>)` to accept `null` as an argument

Result:

Callers may pass `null` to `Bootstrap#resolver(AddressResolverGroup<?>)` to cause the `Bootstrap` instance to use its default resolver group.
2016-06-08 06:57:55 +02:00
Yuri Schimke
a14eda7db0 typo: Skelton 2016-06-06 16:28:21 -07:00
Norman Maurer
b461c9d54c Allow to specify a custom EventExecutorChooserFactory. Related to [#1230]
Motivation:

Sometimes it may be benefitially for an user to specify a custom algorithm when choose the next EventExecutor/EventLoop.

Modifications:

Allow to specify a custom EventExecutorChooseFactory that allows to customize algorithm.

Result:

More flexible api.
2016-06-06 11:04:56 +02:00
Norman Maurer
e847ac0443 Fix possible deadlock in DefaultChannelPipeline.destroyDown(...)
Motivation:

We need to ensure we not hold a lock while executor callHandlerRemoved(...) as this may lead to a deadlock if handlerRemoved(...) will call another method in DEfaultChannelPipeline from another thread that will need to obtain the lock as well and wait for the result.

Modifications:

Release the lock before call handlerRemoved0(...).

Result:

No more deadlock possible
2016-06-04 09:13:54 +02:00
Norman Maurer
f8b306f61c [#5313] Correctly catch errors during bootstrap.
Motivation:

We not correctly catched errors during resolving in bootstrap and so may not have notified the future correctly.

Modifications:

Move code into try / catch block and try to fail the promise.

Result:

Promise is always notified
2016-06-04 09:12:54 +02:00
Norman Maurer
c43b424f56 Add missing null check that was missed in 844976a0a2 2016-05-31 14:05:03 +02:00
Norman Maurer
844976a0a2 Ensure the same ByteBufAllocator is used in the EmbeddedChannel when compress / decompress. Related to [#5294]
Motivation:

The user may specify to use a different allocator then the default. In this case we need to ensure it is shared when creating the EmbeddedChannel inside of a ChannelHandler

Modifications:

Use the config of the "original" Channel in the EmbeddedChannel and so share the same allocator etc.

Result:

Same type of buffers are used.
2016-05-31 09:08:33 +02:00
Norman Maurer
339b512e70 Fix small race in DefaultChannelPipeline introduced by a729e0fcd9
Motivation:

There is a small race while adding handlers to the pipeline because callHandlerAddedForAllHandlers() may not be run when the user calls add* but the Channel is already registered.

Modifications:

Ensure we always delay handlerAdded(..) / handlerRemoved(...) until callHandlerAddedForAllHandlers() was called.

Result:

No more race on pipeline modifications possible.
2016-05-30 15:05:48 +02:00
Norman Maurer
dcd93e3be0 Remove volatile where not needed.
Motivation:

We can remove the volatile keyword from the cached Runnables as at worse these will just be re-created.

Modifications:

Remove volatile.

Result:

Less overhead.
2016-05-30 07:32:45 +02:00
Norman Maurer
86f53083e7 [#5297] Ensure calling NioEventLoop.pendingTasks() and EpollEventLoop.pendingTasks() will not produce livelock
Motivation:

SingleThreadEventExecutor.pendingTasks() will call taskQueue.size() to get the number of pending tasks in the queue. This is not safe when using MpscLinkedQueue as size() is only allowed to be called by a single consumer.

Modifications:

Ensure size() is only called from the EventLoop.

Result:

No more livelock possible when call pendingTasks, no matter from which thread it is done.
2016-05-28 20:04:07 +02:00
Norman Maurer
2618c2a649 [#5239] Allow adding handlers to pipeline with null name.
Motivation:

While doing 8fe3c83e4c I made a change which disallowed using null as name for handlers in the pipeline (this generated a new name before).

Modifications:

Revert to old behaviour and adding test case.

Result:

Allow null name again
2016-05-24 06:22:44 +02:00
Norman Maurer
26a175cd94 Fix flacky test which was missed when commit 8fe3c83e4c 2016-05-22 19:33:48 +02:00
Norman Maurer
7b25402e80 Add CompositeByteBuf.addComponent(boolean ...) method to simplify usage
Motivation:

At the moment the user is responsible to increase the writer index of the composite buffer when a new component is added. We should add some methods that handle this for the user as this is the most popular usage of the composite buffer.

Modifications:

Add new methods that autoamtically increase the writerIndex when buffers are added.

Result:

Easier usage of CompositeByteBuf.
2016-05-21 19:52:16 +02:00
Xiaoyan Lin
a5006c1969 Add a EventLoopGroup.register(ChannelPromise)
Motivation:

EventLoopGroup.register doesn't need the Channel paramter when ChannelPromise is provided as we can get the Channel from ChannelPromise. Resolves #2422.

Modifications:

- Add EventLoopGroup.register(ChannelPromise)
- Deprecate EventLoopGroup.register(Channel, ChannelPromise)

Result:

EventLoopGroup.register is more convenient as people only need to set one parameter.
2016-05-21 18:40:17 +02:00
Norman Maurer
a729e0fcd9 Decouple DefaultChannelPipeline from AbstractChannel
Motivation:

DefaultChannelPipeline was tightly coupled to AbstractChannel which is not really needed.

Modifications:

Move logic of calling handlerAdded(...) for handlers that were added before the Channel was registered to DefaultChannelPipeline by making it part of the head context.

Result:

Less coupling and so be able to use DefaultChannelPipeline also with other Channel implementations that not extend AbstractChannel
2016-05-21 17:14:00 +02:00
Norman Maurer
0838f223e1 Decouple AbstractChannel and AbstractChannelHandlerContext
Motivation:

We do a "blind" cast to AbstractChannel in AbstractChannelHandlerContext which we should better no do. It would be better to decouble AbstractChannelHandlerContext from AbstractChannel.

Modifications:

Decouble AbstractChannelHandlerContext from AbstractChannel by move logic to DefaultChannelPipeline

Result:

Less coubling and less casting.
2016-05-21 10:46:21 +02:00
Norman Maurer
7547a448e0 [#4906] Ensure addLast(...) works as expected in EmbeddedChannel
Motivation:

If the user will use addLast(...) on the ChannelPipeline of EmbeddedChannel after its constructor was run it will break the EmbeddedChannel as it will not be able to collect inbound messages and exceptions.

Modifications:

Ensure addLast(...) work as expected by move the logic of handling messages and exceptions ti protected methods of DefaultChannelPipeline and use a custom implementation for EmbeddedChannel

Result:

addLast(...) works as expected when using EmbeddedChannel.
2016-05-21 10:33:25 +02:00
Norman Maurer
e10dca7601 Mark Recycler.recycle(...) deprecated and update usage.
Motivation:

Recycler.recycle(...) should not be used anymore and be replaced by Handle.recycle().

Modifications:

Mark it as deprecated and update usage.

Result:

Correctly document deprecated api.
2016-05-20 22:11:31 +02:00
Norman Maurer
2e352b75ac Remove unused class
Motivation:

We should remove unused classes that are package-private

Modifications:

Remove unused class

Result:

Less cruft in code-base.
2016-05-20 21:53:59 +02:00
Norman Maurer
a425a8551d [#5174] Expose Bootstrap getter methods and add some additional ones
Motivation:

The Bootstrap class (applies also to AbstractBootstrap and ServerBootstrap) has a few package private getter methods and some things such as #attr() and #options() aren't exposed at all.

Modifications:

Expose "getters" for configured things in a safe-manner via the config() method.

Result:

Easier for the user to check what is configured for a Bootstrap/ServerBootstrap.
2016-05-18 13:26:43 +02:00
Scott Mitchell
2b340df452 DuplexChannel to support shutdownInput
Motivation:
The DuplexChannel is currently incomplete and only supports shutting down the output side of a channel. This interface should also support shutting down the input side of the channel.

Modifications:
- Add shutdownInput and shutdown methods to the DuplexChannel interface
- Remove state in NIO and OIO for tracking input being shutdown independent of the underlying transport's socket type. Tracking the state independently may lead to inconsistent state.

Result:
DuplexChannel supports shutting down the input side of the channel
Fixes https://github.com/netty/netty/issues/5175
2016-05-18 09:11:49 +02:00
Norman Maurer
8fe3c83e4c [#5104] Fix possible deadlock in DefaultChannelPipeline
Motivation:

When a user has multiple EventLoops in an EventLoopGroup and calls pipeline.add* / remove* / replace from an EventLoop that belongs to another Channel it is possible to deadlock if the other EventLoop does the same.

Modification:

- Only ensure the actual modification takes place in a synchronized block and not wait until the handlerAdded(...) / handlerRemoved(...) method is called. This is ok as we submit the task to the executor while still holding the look and so ensure correct order of pipeline modifications.
- Ensure if an AbstractChannelHandlerContext is put in the linked-list structure but the handlerAdded(...) method was not called we skip it until handlerAdded(...) was called. This is needed to ensure handlerAdded(...) is always called first.

Result:

Its not possible to deadlock when modify the DefaultChannelPipeline.
2016-05-17 14:24:46 +02:00
Trustin Lee
3a9f472161 Make retained derived buffers recyclable
Related: #4333 #4421 #5128

Motivation:

slice(), duplicate() and readSlice() currently create a non-recyclable
derived buffer instance. Under heavy load, an application that creates a
lot of derived buffers can put the garbage collector under pressure.

Modifications:

- Add the following methods which creates a non-recyclable derived buffer
  - retainedSlice()
  - retainedDuplicate()
  - readRetainedSlice()
- Add the new recyclable derived buffer implementations, which has its
  own reference count value
- Add ByteBufHolder.retainedDuplicate()
- Add ByteBufHolder.replace(ByteBuf) so that..
  - a user can replace the content of the holder in a consistent way
  - copy/duplicate/retainedDuplicate() can delegate the holder
    construction to replace(ByteBuf)
- Use retainedDuplicate() and retainedSlice() wherever possible
- Miscellaneous:
  - Rename DuplicateByteBufTest to DuplicatedByteBufTest (missing 'D')
  - Make ReplayingDecoderByteBuf.reject() return an exception instead of
    throwing it so that its callers don't need to add dummy return
    statement

Result:

Derived buffers are now recycled when created via retainedSlice() and
retainedDuplicate() and derived from a pooled buffer
2016-05-17 11:16:13 +02:00
Norman Maurer
68cd670eb9 Remove ChannelHandlerInvoker
Motivation:

We tried to provide the ability for the user to change the semantics of the threading-model by delegate the invoking of the ChannelHandler to the ChannelHandlerInvoker. Unfortunually this not really worked out quite well and resulted in just more complexity and splitting of code that belongs together. We should remove the ChannelHandlerInvoker again and just do the same as in 4.0

Modifications:

Remove ChannelHandlerInvoker again and replace its usage in Http2MultiplexCodec

Result:

Easier code and less bad abstractions.
2016-05-17 11:14:00 +02:00
Hyangtack Lee
f44f3e7926 NioEventLoop ensures that all submitted tasks are executed immediately.
Motivation:
If a task was submitted when wakenUp value was true, the task didn't get a chance to call Selector#wakeup.
So we need to check task queue again before executing select operation. If we don't, the task might be pended until select operation was timed out.
It might be pended until idle timeout if IdleStateHandler existed in pipeline.

Modifications:
Execute Selector#select in a non-blocking manner if there's a task submitted when wakenUp value was true.

Result:
Every tasks in NioEventLoop will not be pended.
2016-05-17 07:43:46 +02:00
Norman Maurer
c249926784 [#3127] Allow to write with VoidPromise to Channels in ChannelGroup
Motivation:

Users sometimes want to use Channel.voidPromise() when write to a Channel to reduce GC-pressure. This should be also possible when write via a ChannelGroup.

Modifications:

Add new write(...) and writeAndFlush(...) overloads which allow to signale that a VoidPromise should be used to write to the Channel

Result:

Users can write with VoidPromise when using ChannelGroup
2016-05-14 20:53:25 +02:00
Norman Maurer
27a392b877 Add ChannelInboundInvoker and ChannelOutboundInvoker
Motivation:

ChannelHandlerContext, ChannelPipeline and Channel share various method signatures. We should provide an interface to share.

Modifications:

Add ChannelInboundInvoker and ChannelOutboundInvoker and extend these.

Result:

Better API abstraction.
2016-05-14 20:41:13 +02:00
Norman Maurer
01109dd635 Fix test-failures introduces by c1827114e9. 2016-05-14 20:38:31 +02:00
Norman Maurer
c1827114e9 Use ConnectException when connection failed for LocalChannel
Motivation:

To be more consistent we should use ConnectException when we fail the connect attempt because no LocalServerChannel exists with the given address.

Modifications:

Use correct exception.

Result:

More consistent handling of connection refused between different transports.
2016-05-14 07:23:55 +02:00
Norman Maurer
775dd139ea Ensure Bootstrap.connect(...) not throw IllegalStateException when registration is delayed.
Motivation:

Bootstrap.connect(...) tries to obtain the EventLoop of a Channel before it may be registered. This will cause an IllegalStateException. We need to ensure we handle the cause of late registration and not throw in this case.

Modifications:

Ensure we only try to access the EventLoop after the Channel is registered and handle the case of late registration.

Result:

Bootstrap.connect(...) not fails on late registration.
2016-05-14 07:22:38 +02:00
Scott Mitchell
1f8e192e21 Remove EventExecutor.children
Motivation:
EventExecutor.children uses generics in such a way that an entire colleciton must be cast to a specific type of object. This interface is not very flexible and is impossible to implement if the EventExecutor type must be wrapped. The current usage of this method also does not have any clear need within Netty. The Iterator interface allows for EventExecutor to be wrapped and forces the caller to make assumptions about types instead of building the assumptions into the interface.

Motivation:
- Remove EventExecutor.children and undeprecate the iterator() interface

Result:
EventExecutor interface has one less method and is easier to wrap.
2016-05-13 18:17:22 -07:00
Norman Maurer
690ab563e7 Ensure ChannelHandlerContext.attr(...) and ChannelHandlerContext.hasAttr(...) has no semantic change
Motivation:

The ChannelHandlerContext.attr(...) and ChannelHandlerContext.hasAttr(...) delegated to Channel for the attributes which is a semantic change compared to 4.0 releases. We should not change the semantic to not break users applications when upgrading to 4.1.0

Modifications:

- Revert semantic change
- Mark ChannelHandlerContext.attr(...) and hasAttr(...) as @deprecated so we can remove these later

Result:

Semantic of attribute operations on ChannelHandlerContext is the same in 4.1 as in 4.0 again.
2016-05-13 15:51:58 +02:00
Norman Maurer
5ffa3b1c46 Only try to bind if late registration not failed.
Motivation:

We should not try to call bind if registration failed.

Modifications:

Only call doBind0(...) when the registration not failed.

Result:

Not try to to bind if the registration failed.
2016-05-13 12:10:31 +02:00
Norman Maurer
ea61b5b5b3 [#5223] Remove indirection in DefaultChannelPipeline.executorSafe(...)
Motivation:

We use channel.unsafe().invoker().executor() in DefaultChannelPipeline.executorSafe(...) which is an unnecessary indirection to channel.eventLoop().

Modifications:

Remove indirection by using channel.eventLoop().

Result:

Cleaner code.
2016-05-13 08:42:36 +02:00
Scott Mitchell
f2ed3e6ce8 DefaultPromise LateListener Logic Issues
Motivation:
The LateListener logic is prone to infinite loops and relies on being processed in the EventExecutor's thread for synchronization, but this EventExecutor may not be constant. An infinite loop can occur if the EventExecutor's execute method does not introduce a context switch in LateListener.run. The EventExecutor can be changed by classes which inherit from DefaultPromise. For example the DefaultChannelPromise will return w/e EventLoop the channel is registered to, but this EventLoop can change (re-registration).

Modifications:
- Remove the LateListener concept and instead use a single Object to maintain the listeners while still preserving notification order
- Make the result member variable an atomic variable so it can be outside the synchronized(this) blocks
- Cleanup/simplify existing state management code

Result:
Fixes https://github.com/netty/netty/issues/5185
2016-05-09 10:33:40 -07:00
Norman Maurer
b2bb72b2de [#5171] Ensure NioDatagramChannelConfig can be instanced on android
Motivation:

NioDatagramChannelConfig currently uses NetworkChannel in its static { } block and so fails to init on android which not has this class.

Modifications:

Use reflection to load the NetworkChannel.class

Result:

Be able to use NIO Datagram on android as well.
2016-05-06 08:04:36 +02:00