Commit Graph

7286 Commits

Author SHA1 Message Date
Norman Maurer
69070c37ba ByteBuf.readBytes(...) should use the allocator of the buffer to create the new buffer. Related to [#5093]
Motivation:

ByteBuf.readBytes(...) uses Unpooled.buffer(...) internally which will use a heap ByteBuf and also not able to make use of the allocator which may be pooled. We should better make use of the allocator.

Modifications:

Use the allocator for thenew buffer.

Result:

Take allocator into account when copy bytes.
2016-04-09 20:28:17 +02:00
Norman Maurer
200ca39b5c Add PooledByteBufAllocator.dumpStats() which allows to obtain a human-readable status of the allocator.
Motiviation:

Sometimes it is useful to dump the status of the PooledByteBufAllocator and log it. Doing this is currently a bit cumbersome as the user needs to basically iterate through all the metrics and compose the String. we would better provide an easy way to do this.

Modification:

Add dumpStats() method.

Result:

Easier to get a view into the status of the allocator.
2016-04-09 19:16:53 +02:00
Norman Maurer
9498d1a9b3 Allow to create a JdkSslContext from an existing JDK SSLContext. Related to [#5095] and [#4929]
Motivation:

Sometimes a user only has access to a preconfigured SSLContext but still would like to use our ssl sub-system. For this situations it would be very useful if the user could create a JdkSslContext instance from an existing SSLContext.

Modifications:

- Create new public constructors in JdkSslContext which allow to wrap an existing SSLContext and make the class non-abstract
- Mark JdkSslServerContext and JdkSslClientContext as deprecated as the user should not directly use these.

Result:

It's now possible to create an JdkSslContext from an existing SSLContext.
2016-04-09 19:06:17 +02:00
Norman Maurer
eb14e5b2f5 Ensure EpollSocketChannel.localAddress() returns correct address after connect(...) call.
Motivation:

We missed to correctly retrieve the localAddress() after we called Socket.connect(..) and so the user would always see an incorrect address when calling EpollSocketChannel.localAddress().

Modifications:

- Ensure we always retrieve the localAddress() after we called Socket.connect(...) as only after this we will be able to receive the correct address.
- Add unit test

Result:

Correct and consistent behaviour across different transports (NIO/OIO/EPOLL).
2016-04-09 19:04:45 +02:00
Norman Maurer
cfa258e096 PoolChunkList.allocate(...) should return false without the need to walk all the contained PoolChunks when the requested capacity is too big.
Motivation:

PoolChunkList.allocate(...) should return false without the need to walk all the contained PoolChunks when the requested capacity is larger then the capacity that can be allocated out of the PoolChunks in respect to the minUsage() and maxUsage() of the PoolChunkList.

Modifications:

Precompute the maximal capacity that can be allocated out of the PoolChunks that are contained in the PoolChunkList and use this to fast return from the allocate(...) method if an allocation capacity larger then that is requested.

Result:

Faster detection of allocations that can not be handled by the PoolChunkList and so faster allocations in general via the PoolArena.
2016-04-09 19:00:20 +02:00
Norman Maurer
2ae97946dd Allow to retrieve the number of active bytes per PoolArena.
Motivation:

To better understand how much memory is used by Netty for ByteBufs it is useful to understand how many bytes are currently active (allocated) per PoolArena.

Modifications:

- Add PoolArenaMetric.numActiveBytes()

Result:

The user is able to get better insight into the PooledByteBufAllocator.
2016-04-09 18:54:05 +02:00
Norman Maurer
787a55874b Cleanup PoolChunk and PoolArena
Motivation:

To make it easier to understand PoolChunk and PoolArena we should cleanup duplicated code.

Modifications:

- Move reused code into methods
- Use Math.max(...)

Result:

Cleaner code and easier to understand.
2016-04-09 18:47:40 +02:00
Norman Maurer
d081851156 Remove ByteBuf.readBytes(int) calls when possible
Motivation:

We use ByteBuf.readBytes(int) in various places where we could either remove it completely or use readSlice(int).retain().

Modifications:

- Remove ByteBuf.readBytes(int) when possible or replace by readSlice(int).retain().

Result:

Faster code.
2016-04-09 18:40:57 +02:00
Norman Maurer
1b4a5609d3 Not try to allocate out of the PoolChunkList that contains only full PoolChunks
Motivation:

When doing a normal allocation in PoolArena we also tried to allocate out of the PoolChunkList that only contains completely full PoolChunks. This makes no sense as these are full anyway so an allocation will never work here and just gives a perf hit as we need to walk the whole list of PoolChunks in the list.

Modifications:

Not try to allocate from PoolChunkList that only contains full PoolChunks

Result:

Faster allocation times when a new PoolChunk must be created.
2016-04-09 18:39:56 +02:00
Scott Mitchell
a0b28d6c82 Fix potential assertion error introduced by 0bc93dd
Motivation:
Commit 0bc93dd introduced a potential assertion failure, if the deprecated method would be used.

Modifications:
Fix the potential assertion error.

Result:
Regression removed
2016-04-08 09:44:44 -07:00
Scott Mitchell
9a63aafe22 EPOLL ET Set ReadFlag and Limit epollInReadyRunnable
Motivation:
441aa4c575 conditionally set the readFlag based upon if maybeMoreDataToRead is set. It is possible that the read flag will not be set, and nothing will be read by executeEpollInReadyRunnable and no actual data will be read even though the user requested it.

Modifications:
- Always set the readFlag in doBeginRead
- Make it so only a single epollInReadyRunnable can execute for a channel at a time

Result:
Less chance of missing read events in EPOLL transport.
2016-04-08 11:03:52 +02:00
Trustin Lee
32cfe25132 Fix checkstyle 2016-04-08 17:44:52 +09:00
Trustin Lee
c1a3cc32e7 Fix an assertion error introduced by 0bc93dda08
Motivation:
    
Commit 0bc93dda08 introduced an assertion
failure.

Modifications:

Fix the assertion error.

Result:

Regression removed
2016-04-08 17:23:32 +09:00
stroller
84e281ced9 fix one java doc issue: extra }
Motivation:

There is one extra } for WriteBufferWaterMark's javadoc:
{@linkplain #high}  high water mark}

The generated javadoc will show the content: "the high high water mark}"

Modifications:

remove the }

Result:
The generated javadoc will show the content: "the high water mark" instead of "the high high water mark}"
2016-04-08 09:47:26 +02:00
Xiaoyan Lin
bc6adab48c Make all InternalLoggerFactory implementations be singletons
Motivation:

It's better to make all InternalLoggerFactory implementations be singletons according to the discussions in #5047

Modifications:

Make all InternalLoggerFactory implementations be singletons and hide the construtors.

Result:

All InternalLoggerFactory implementations be singletons.
2016-04-08 09:39:32 +02:00
Scott Mitchell
0bc93dda08 NIO autoReadClear should also clear the SelectionKey
Motivation:
Prior to 5b48fc284e setting readPending to false when autoReadClear was called was enough because when/if the EventLoop woke up with a read event we would first check if readPending was true and if it is not, we would return early. Now that readPending will only be set in the EventLoop it is not necessary to check readPending at the start of the read methods, and we should instead remove the OP_READ from the SelectionKey when we also set readPending to false.

Modifications:
- autoReadCleared should call AbstractNioUnsafe.removeReadOp

Result:
NIO is now consistent with EPOLL and removes the READ operation on the selector when autoRead is cleared.
2016-04-08 00:03:37 -07:00
Norman Maurer
562d8d2200 Add smtp codec (client side only).
Motivation:

When writing a SMTP client a provided SMTP codec that follows RFC2821 is useful.

Modification:

Add client side codec and test.

Results:

People who want to write a SMTP client can reuse the codec.
2016-04-07 18:42:17 +02:00
Hyangtack Lee
24254b159f Propagate h2c upgrade success event to the next handler before removing source codec
Motivation:

When upgrading h2c, I found that sometimes both of http2 settings frame and http response message was arrived before receiving upgrade success event. It was because ByteToMessageDecoder propagated its internally buffered message to the next handler when removing itself from pipeline.(refer to ByteToMessageDecoder#handlerRemoved)
I think it's better to propagate upgrade success event when handling 101 switching protocol response.

Modifications:

Upgrade success event will be propagated before removing source codec.

Result:

It guarantees that upgrade success event will be arrived first at the next handler.
2016-04-07 17:41:46 +02:00
Xiaoyan Lin
e053b96b5c Set the length fields of memcache messages automatically
Motivation:

People need to set all length fields manually when creating a memcache message and it's error prone. See #2736 for more dicussion.

Modifications:

This patch adds the logic to update the keyLength, extrasLength and totalBodyLength when key, extras or content is set.

Result:

The length fields of memcache messages will be updated automatically.
2016-04-07 06:30:42 +02:00
Scott Mitchell
5b48fc284e Make OIO/NIO/EPOLL autoReadClear consistent
Motivation:
OIO/NIO use a volatile variable to track if a read is pending. EPOLL does not use a volatile an executes a Runnable on the event loop thread to set readPending to false. These mechansims should be consistent, and not using a volatile variable is preferable because the variable is written to frequently in the event loop thread.
OIO also does not set readPending to false before each fireChannelRead operation and may result in reading more data than the user desires.

Modifications:
- OIO/NIO should not use a volatile variable for readPending
- OIO should set readPending to false before each fireChannelRead

Result:
OIO/NIO/EPOLL are more consistent w.r.t. readPending and volatile variable operations are reduced
Fixes https://github.com/netty/netty/issues/5069
2016-04-06 12:32:14 -07:00
Norman Maurer
7b121c26ae Use Math.min(...) and Math.max(...) as these are intrinsics.
Motivation:

We should better use Math utilities as these are intrinsics. This is a cleanup for ea3ffb8536.

Modifications:

Use Math utilities.

Result:

Cleaner code and use of intrinsics.
2016-04-06 21:30:32 +02:00
Kun Zhang
c024dc92d0 Explicit thread group on DefaultThreadFactory.
Motivation:

Fixes #5084. We (gRPC) encountered a bug that was triggered by
grpc/grpc-java@d927180. After that commit, event loop threads are
created per task by NioEventLoopGroup, and inherits the thread group of
the caller, which in our case is an application-provided request-scope
thread. Things go south when the application tries to manipulate (e.g.,
interrupt and join) all threads of the request-scope thread group, which
unexpectedly include the event loop threads.

Modifications:

DefaultThreadFactory will save the current thread group in constructor,
and apply it to all new threads.

Result:

Threads created by DefaultThreadFactory will be in the same thread group
as the thread where the factory is created.
2016-04-06 21:19:43 +02:00
Norman Maurer
88b093c481 PoolChunkList not correctly move PoolChunks when these are moved.
Motivation:

When a PoolChunk needs to get moved to the previous PoolChunkList because of the minUsage / maxUsage constraints we always just moved it one level which is incorrect and so could lead to have PoolChunks in the wrong PoolChunkList (in respect to their minUsage / maxUsage settings). This then could have the effect that PoolChunks are not released / freed in a timely fashion and so.

Modifications:

- Correctly move PoolChunks between PoolChunkLists, which includes moving it multiple "levels".
- Add unit test

Result:

Correctlty move the PoolChunk to PoolChunkList when it is freed, even if its multiple layers.
2016-04-06 11:52:23 +02:00
Trustin Lee
4fa5d2cf52 Do now swallow an exception triggered by late listener notification
Related: #3449

Motivation:

When a user shut down an EventExecutor/Loop prematurely, a Promise will
fail to execute its listeners. When it happens, DefaultPromise will log
a message at ERROR level, but there's no way to get notified about it
programmatically.

Modifications:

Do not catch and log the RejectedExecutionException unconditionally,
but only catch and log for non-late listener notifications, so that a
user gets notified on submission failure at least when the listener is
late.

Result:

Remedies #3449 to some extent, although we will need fundamental fix for
that, such as #3566
2016-04-06 11:16:44 +02:00
Norman Maurer
d0943dcd30 [#5028] Fix re-entrance issue with channelWritabilityChanged(...) and write(...)
Motivation:

When always triggered fireChannelWritabilityChanged() directly when the update the pending bytes in the ChannelOutboundBuffer was made from within the EventLoop. This is problematic as this can cause some re-entrance issue if the user has a custom ChannelOutboundHandler that does multiple writes from within the write(...) method and also has a handler that will intercept the channelWritabilityChanged event and trigger another write when the Channel is writable. This can also easily happen if the user just use a MessageToMessageEncoder subclass and triggers a write from channelWritabilityChanged().

Beside this we also triggered fireChannelWritabilityChanged() too often when a user did a write from outside the EventLoop. In this case we increased the pending bytes of the outboundbuffer before scheduled the actual write and decreased again before the write then takes place. Both of this may trigger a fireChannelWritabilityChanged() event which then may be re-triggered once the actual write ends again in the ChannelOutboundBuffer.

The third gotcha was that a user may get multiple events even if the writability of the channel not changed.

Modification:

- Always invoke the fireChannelWritabilityChanged() later on the EventLoop.
- Only trigger the fireChannelWritabilityChanged() if the channel is still active and if the writability of the channel changed. No need to cause events that were already triggered without a real writability change.
- when write(...) is called from outside the EventLoop we only increase the pending bytes in the outbound buffer (so that Channel.isWritable() is updated directly) but not cause a fireChannelWritabilityChanged(). The fireChannelWritabilityChanged() is then triggered once the task is picked up by the EventLoop as usual.

Result:

No more re-entrance possible because of writes from within channelWritabilityChanged(...) method and no events without a real writability change.
2016-04-06 10:07:13 +02:00
Norman Maurer
ea3ffb8536 Fix PoolChunkList.minUsage() and maxUsage() for head and tail
Motivation:

The PoolChunkList.minUsage() and maxUsage() needs to take special action to translate Integer.MIN_VALUE / MAX_VALUE as these are used internal for tail and head of the linked-list structure.

Modifications:

- Correct the minUsage() and maxUsage() methods.
- Add unit test.

Result:

Correct metrics
2016-04-06 10:03:28 +02:00
Scott Mitchell
8033faa03b fcbeebf6df unit test bug
Motivation:
fcbeebf6df introduced a unit test to verify ApplicationProtocolNegotiationHandler is compatible with SniHandler. However only the server attempts ALPN and verifies that it completes and the client doesn't verify the handshake is completed. This can lead to the client side SSL engine to prematurely close and throw an exception.

Modifications:
- The client should wait for the SSL handshake and ALPN to complete before the test exits.

Result:
SniHandlerTest.testSniWithApnHandler is more reliable.
2016-04-06 00:11:10 -07:00
Scott Mitchell
9fb86a380d NIO/EPOLL readPending set to false incorrectly
Motivation:
441aa4c575 introduced a bug in transport-native-epoll where readPending is set to false before a read is attempted, but this should happen before fireChannelRead is called. The NIO transport also only sets the readPending variable to false on the first read in the event loop. This means that if the user only calls read() on the first channelRead(..) the select loop will still listen for read events even if the user does not call read() on subsequent channelRead() or channelReadComplete() in the same event loop run. If the user only needs 2 channelRead() calls then by default they will may get 14 more channelRead() calls in the current event loop, and then 16 more when the event loop is woken up for a read event. This will also read data off the TCP stack and allow the peer to queue more data in the local RECV buffers.

Modifications:
- readPending should be set to false before each call to channelRead()
- make NIO readPending set to false consistent with EPOLL

Result:
NIO and EPOLL transport set readPending to false at correct times which don't read more data than intended by the user.
Fixes https://github.com/netty/netty/issues/5082
2016-04-06 00:09:49 -07:00
Norman Maurer
7d60699a49 Fix compile error caused by 7fb475a223, because I missed to adjust jni code. 2016-04-06 08:39:27 +02:00
Norman Maurer
d602277204 Include cause that was used to notify the promise when logging an failed try to notify it.
Motivation:

When a promise is notified that was already added to the ChannelOutboundBuffer and we try to notify it later on we only see a warning that it was notified before. This is often not very useful as we have no idea where it was notified at all. We can do better in case it was failed before (which is most of the times the case) and just also log the cause that was used for it.

Modifications:

Add the cause that was used to notify the promise when we fail to notify it as part of the ChannelOutboundBuffer.

Result:

Easier to debug user errors.
2016-04-05 21:13:51 +02:00
Norman Maurer
7fb475a223 Fix typo missed in f46cfbc590 2016-04-05 15:32:54 +02:00
Norman Maurer
f46cfbc590 [#5059] Deprecate method with typo and introduce a new one without typo
Motivation:

There is a spelling error in FileRegion.transfered() as it should be transferred().

Modifications:

Deprecate old method and add a new one.

Result:

Fix typo and can remove the old method later.
2016-04-05 15:06:46 +02:00
Xiaoyan Lin
105df33d8d Add Log4J2LoggerFactory and Log4J2Logger
Motivation:

See #3095

Modifications:

Add Log4J2LoggerFactory and Log4J2Logger which is an InternalLogger implementation based on log4j2.

Result:

The user can use log4j2 directly without a special slf4j binding.
2016-04-05 14:01:32 +02:00
Norman Maurer
ea94336689 DefaultChannelHandlerInvoker should work with non AbstractChannelHandlerContext sub-classes.
Motivation:

DefaultChannelHandlerInvoker currently blindly cast to AbstractChannelHandlerContext without checking if the ChannelHandlerContext is really a sub-type of it. It should check it first and if not just use slow-path implementation.

Modifications:

Do instanceof check first and if it fails just create a new Runnable instance of used the cached.

Result:

DefaultChannelHandlerInvoker works with any ChannelHandlerContext implementations.
2016-04-05 13:21:07 +02:00
Norman Maurer
4e779cd6b0 Allow to disable leak detection for all buffers when using UnpooledByteBufAllocator.
Motivation:

Sometimes it is useful to allow to disable the leak detection of buffers if the UnpooledByteBufAllocator is used. This is for example true if the app wants to leak buffers into user code but not want to put the burden on the user to always release the buffer.

Modifications:

Add another constructor to UnpooledByteBufAllocator that allows to completely disable leak-detection for all buffers that are allocator out of the UnpooledByteBufAllocator.

Result:

It's possible to disable leak-detection when the UnpooledByteBufAllocator is used.
2016-04-05 13:17:16 +02:00
Norman Maurer
1d23e358b4 Only increment metric for huge / normal allocations after the allocation was really done.
Motivation:

We should only increment the metric for the huge / normal allocation after it is done. Also we should only decrement once deallocate.

Modifications:

- Move increment after the allocation.
- Fix deallocation metric and move it after deallocation

Result:

More correct metrics.
2016-04-05 12:00:44 +02:00
Norman Maurer
b32e07c75a PoolThreadCache uses wrong variable in IllegalArgumentException
Motivation:

PoolThreadCache includes the wrong value when throwing a IllegalArgumentException because of freeSweepAllocationThreshold.

Modifications:

Use the correct value.

Result:

Correct exception message.
2016-04-05 11:48:38 +02:00
Scott Mitchell
fcbeebf6df ApplicationProtocolNegotiationHandler doesn't work with SniHandler
Motivation:
ApplicationProtocolNegotiationHandler attempts to get a reference to an SslHandler in handlerAdded, but when SNI is in use the actual SslHandler will be added to the pipeline dynamically at some later time. When the handshake completes ApplicationProtocolNegotiationHandler throws an IllegalStateException because its reference to SslHandler is null.

Modifications:
- Instead of saving a reference to SslHandler in handlerAdded just search the pipeline when the SslHandler is needed

Result:
ApplicationProtocolNegotiationHandler support SniHandler.
Fixes https://github.com/netty/netty/issues/5066
2016-04-05 09:02:46 +02:00
Trustin Lee
516e4933c4 Remove an unused import 2016-04-02 01:39:47 -04:00
Trustin Lee
3b941c2a7c [maven-release-plugin] prepare for next development iteration 2016-04-02 01:25:05 -04:00
Trustin Lee
7368ccc539 [maven-release-plugin] prepare release netty-4.1.0.CR6 2016-04-02 01:24:55 -04:00
Trustin Lee
4b38b72a0d Fix incorrect name encoding/decoding in DNS records
Motivation:

- The decoded name should always end with a dot (.), but we currently
  strip it, which is incorrect.
  - (O) 0 -> "."
  - (X) 0 -> ""
  - (O) 5 netty 2 io 0 -> "netty.io."
  - (X) 5 netty 2 io 0 -> "netty.io"
- The encoded name should end with a null-label, which is a label whose
  length is 0, but we currently append an extra NUL, causing FORMERR(1)
  on a strict DNS server:
  - (O) . -> 0
  - (X) . -> 0 0
  - (O) netty.io. -> 5 netty 2 io 0
  - (X) netty.io. -> 5 netty 2 io 0 0

Modifications:

- Make sure to append '.' when decoding a name.
- Improve index checks so that the decoder can raise
  CorruptFrameException instead of IIOBE
- Do not encode extra NUL
- Add more tests

Result:

Robustness and correctness
2016-04-01 22:18:33 +02:00
Scott Mitchell
441aa4c575 EPOLL ET Missed Reads
Motivation:
bfbef036a8 made EPOLL respect autoRead while in ET mode. However it is possible that we may miss data pending on the RECV queue if autoRead is off. This is because maybeMoreDataToRead is updated after fireChannelRead and if a user calls read() from here maybeMoreDataToRead will be false because it is updated after the fireChannelRead call. The way maybeMoreDataToRead was updated also causes a single channel to continuously read on the event loop and not relinquish and give other channels to try reading.

Modifications:
- Ensure maybeMoreDataToRead is always set after all user events, and is evaluated with readPending to execute a epollInReady on the EventLoop
- Combine the checkResetEpollIn and maybeMoreDataToRead logic to invoke a epollInReady later into the epollInFinally method due to similar responsibilities
- Update unit tests to reflect the user calling read() on the event loop from channelRead()

Result:
EPOLL ET with autoRead set to false will not leave data on the RECV queue.
2016-04-01 13:06:19 -07:00
Norman Maurer
4a18bcaa59 [#5062] Mark MqttEncoder @Sharable
Motivation:

Commit 2696778 changed MqttEncoder to be a singelton but missed to add @Sharable annotation. This broke the encoder as it can not be added to multiple pipelines.

Modifications:

Add @Sharable annotation

Result:

MqttEncoder can be used in multiple pipelines again.
2016-04-01 14:48:43 +02:00
jiafu1115
3e5dcb5f3e [#3806] Setting WRITE_BUFFER_LOW_WATER_MARK before WRITE_BUFFER_HIGH_WATER_MARK results in an internal Exception
Motivation:

Setting the WRITE_BUFFER_LOW_WATER_MARK before WRITE_BUFFER_HIGH_WATER_MARK results in an internal Exception (appears only in the logs) if the value is larger than the default high water mark value. The WRITE_BUFFER_HIGH_WATER_MARK call appears to have no effect in this context.

Setting the values in the reverse order works.

Modifications:

- deprecated ChannelOption.WRITE_BUFFER_HIGH_WATER_MARK and
ChannelOption.WRITE_BUFFER_LOW_WATER_MARK.
- add one new option called ChannelOption.WRITE_BUFFER_WATER_MARK.

Result:
The high/low water mark values limits caused by default values are removed.

Setting the WRITE_BUFFER_LOW_WATER_MARK before WRITE_BUFFER_HIGH_WATER_MARK results in an internal Exception (appears only in the logs) if the value is larger than the default high water mark value. The WRITE_BUFFER_HIGH_WATER_MARK call appears to have no effect in this context.

Setting the values in the reverse order works.
2016-03-31 13:44:44 +02:00
Tibor Csögör
9d4fae308c ChannelInitializer: change propagation of channelRegistered event
Motivation:

If a handler is added to the pipeline within ChannelInitializer::initChannel via
addFirst(...) then it will not receive the channelRegistered event.  The same
handler added via addLast(...) will receive the event.  This different behavior
is unlikely to be expected by users and can cause confusion.

Modifications:

Let ChannelInitializer::channelRegistered propagate the event by passing it to
the pipeline instead of firing it on the ChannelHandlerContext.

Result:

The channelRegistered event is propagated to handlers regardless of the method
used to add it to the pipeline (addFirst/addLast).
2016-03-31 09:01:00 +02:00
Scott Mitchell
0c839d9e0a EPOLL SelectStrategy
Motivation:
NIO now supports a pluggable select strategy, but EPOLL currently doesn't support this. We should strive for feature parity for EPOLL.

Modifications:
- Add SelectStrategy to EPOLL transport.

Result:
EPOLL transport supports SelectStategy.
2016-03-30 15:11:35 -07:00
Michael Nitschinger
5d76daf33b Allow to customize NIO (channel) select strategies.
Motivation:

Under high throughput/low latency workloads, selector wakeups are
degrading performance when the incoming operations are triggered
from outside of the event loop. This is a common scenario for
"client" applications where the originating input is coming from
application threads rather from the socket attached inside the
event loops.

As a result, it can be desirable to defer the blocking select
so that incoming tasks (write/flush) do not need to wakeup
the selector.

Modifications:

This changeset adds the notion of a generic SelectStrategy which,
based on its contract, allows the implementation to optionally
defer the blocking select based on some custom criteria.

The default implementation resembles the original behaviour, that
is if tasks are in the queue `selectNow()` and move on, and if no
tasks need to be processed go into the blocking select and wait
for wakeup.

The strategy can be customized per `NioEventLoopGroup` in the
constructor.

Result:

High performance client applications are now given the chance to
customize for how long the actual selector blocking should be
deferred by employing a custom select strategy.
2016-03-30 15:01:25 -07:00
Norman Maurer
2facb7affd Change DefaultChannelId visibility to default. Related to [#5053]
Motivation:

There is no need to make DefaultChannelId package private as it may be useful for the user. For example EmbeddedChannel allows to inject a ChannelId when it is constructed. For this case the user can just use DefaultChannelId.

Modifications:

Change visibility of DefaultChannelId to public.

Result:

It's possible to create a new instance of DefaultChannelId by the user.
2016-03-30 17:39:32 +02:00
Norman Maurer
cee38ed2b6 [maven-release-plugin] prepare for next development iteration 2016-03-29 16:45:13 +02:00