14158070bf
The API changes made so far turned out to increase the memory footprint
and consumption while our intention was actually decreasing them.
Memory consumption issue:
When there are many connections which does not exchange data frequently,
the old Netty 4 API spent a lot more memory than 3 because it always
allocates per-handler buffer for each connection unless otherwise
explicitly stated by a user. In a usual real world load, a client
doesn't always send requests without pausing, so the idea of having a
buffer whose life cycle if bound to the life cycle of a connection
didn't work as expected.
Memory footprint issue:
The old Netty 4 API decreased overall memory footprint by a great deal
in many cases. It was mainly because the old Netty 4 API did not
allocate a new buffer and event object for each read. Instead, it
created a new buffer for each handler in a pipeline. This works pretty
well as long as the number of handlers in a pipeline is only a few.
However, for a highly modular application with many handlers which
handles connections which lasts for relatively short period, it actually
makes the memory footprint issue much worse.
Changes:
All in all, this is about retaining all the good changes we made in 4 so
far such as better thread model and going back to the way how we dealt
with message events in 3.
To fix the memory consumption/footprint issue mentioned above, we made a
hard decision to break the backward compatibility again with the
following changes:
- Remove MessageBuf
- Merge Buf into ByteBuf
- Merge ChannelInboundByte/MessageHandler and ChannelStateHandler into ChannelInboundHandler
- Similar changes were made to the adapter classes
- Merge ChannelOutboundByte/MessageHandler and ChannelOperationHandler into ChannelOutboundHandler
- Similar changes were made to the adapter classes
- Introduce MessageList which is similar to `MessageEvent` in Netty 3
- Replace inboundBufferUpdated(ctx) with messageReceived(ctx, MessageList)
- Replace flush(ctx, promise) with write(ctx, MessageList, promise)
- Remove ByteToByteEncoder/Decoder/Codec
- Replaced by MessageToByteEncoder<ByteBuf>, ByteToMessageDecoder<ByteBuf>, and ByteMessageCodec<ByteBuf>
- Merge EmbeddedByteChannel and EmbeddedMessageChannel into EmbeddedChannel
- Add SimpleChannelInboundHandler which is sometimes more useful than
ChannelInboundHandlerAdapter
- Bring back Channel.isWritable() from Netty 3
- Add ChannelInboundHandler.channelWritabilityChanges() event
- Add RecvByteBufAllocator configuration property
- Similar to ReceiveBufferSizePredictor in Netty 3
- Some existing configuration properties such as
DatagramChannelConfig.receivePacketSize is gone now.
- Remove suspend/resumeIntermediaryDeallocation() in ByteBuf
This change would have been impossible without @normanmaurer's help. He
fixed, ported, and improved many parts of the changes.
321 lines
10 KiB
XML
321 lines
10 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
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<!--
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~ Copyright 2013 The Netty Project
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~
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~ The Netty Project licenses this file to you under the Apache License,
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~ version 2.0 (the "License"); you may not use this file except in compliance
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~ with the License. You may obtain a copy of the License at:
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~
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~ http://www.apache.org/licenses/LICENSE-2.0
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~
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~ Unless required by applicable law or agreed to in writing, software
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~ distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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~ WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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~ License for the specific language governing permissions and limitations
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~ under the License.
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-->
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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<parent>
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<groupId>io.netty</groupId>
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<artifactId>netty-testsuite-osgi-parent</artifactId>
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<version>4.0.0.CR4-SNAPSHOT</version>
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</parent>
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<artifactId>netty-testsuite-osgi-exam</artifactId>
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<packaging>bundle</packaging>
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<name>Netty/Testsuite/OSGi/Exam</name>
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<description>verify osgi compliance: run tests inside osgi framework</description>
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<properties>
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<pax.exam.version>3.0.3</pax.exam.version>
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<pax.url.version>1.5.2</pax.url.version>
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</properties>
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<dependencies>
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<!-- MAIN -->
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<!-- Include all Netty OSGI bundle release modules. -->
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<dependency>
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<groupId>${project.groupId}</groupId>
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<artifactId>netty-buffer</artifactId>
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<version>${project.version}</version>
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</dependency>
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<dependency>
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<groupId>${project.groupId}</groupId>
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<artifactId>netty-codec</artifactId>
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<version>${project.version}</version>
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</dependency>
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<dependency>
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<groupId>${project.groupId}</groupId>
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<artifactId>netty-codec-http</artifactId>
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<version>${project.version}</version>
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</dependency>
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<dependency>
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<groupId>${project.groupId}</groupId>
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<artifactId>netty-codec-socks</artifactId>
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<version>${project.version}</version>
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</dependency>
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<dependency>
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<groupId>${project.groupId}</groupId>
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<artifactId>netty-common</artifactId>
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<version>${project.version}</version>
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</dependency>
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<dependency>
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<groupId>${project.groupId}</groupId>
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<artifactId>netty-handler</artifactId>
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<version>${project.version}</version>
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</dependency>
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<dependency>
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<groupId>${project.groupId}</groupId>
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<artifactId>netty-transport</artifactId>
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<version>${project.version}</version>
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</dependency>
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<dependency>
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<groupId>${project.groupId}</groupId>
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<artifactId>netty-transport-rxtx</artifactId>
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<version>${project.version}</version>
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</dependency>
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<dependency>
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<groupId>${project.groupId}</groupId>
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<artifactId>netty-transport-sctp</artifactId>
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<version>${project.version}</version>
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</dependency>
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<dependency>
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<groupId>${project.groupId}</groupId>
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<artifactId>netty-transport-udt</artifactId>
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<version>${project.version}</version>
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</dependency>
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<!-- Logging via http://team.ops4j.org/wiki/display/paxlogging/Pax+Logging -->
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<dependency>
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<groupId>org.slf4j</groupId>
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<artifactId>slf4j-api</artifactId>
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</dependency>
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<!-- OSGI Declarative Services runtime http://felix.apache.org/site/apache-felix-service-component-runtime.html -->
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<dependency>
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<groupId>org.apache.felix</groupId>
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<artifactId>org.apache.felix.scr</artifactId>
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<version>1.6.2</version>
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</dependency>
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<!-- OSGI specification. -->
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<dependency>
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<groupId>org.osgi</groupId>
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<artifactId>org.osgi.core</artifactId>
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<version>4.3.1</version>
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<scope>provided</scope>
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</dependency>
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<dependency>
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<groupId>org.osgi</groupId>
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<artifactId>org.osgi.compendium</artifactId>
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<version>4.3.1</version>
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<scope>provided</scope>
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</dependency>
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<!-- TEST -->
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<!-- Transport UDT tests and dependencies. -->
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<dependency>
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<groupId>${project.groupId}</groupId>
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<artifactId>netty-transport-udt</artifactId>
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<version>${project.version}</version>
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<classifier>tests</classifier>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>com.yammer.metrics</groupId>
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<artifactId>metrics-core</artifactId>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>com.google.caliper</groupId>
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<artifactId>caliper</artifactId>
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<scope>test</scope>
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</dependency>
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<!-- Pax Exam test environment. -->
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<dependency>
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<groupId>org.ops4j.pax.exam</groupId>
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<artifactId>pax-exam-container-native</artifactId>
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<version>${pax.exam.version}</version>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>org.ops4j.pax.exam</groupId>
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<artifactId>pax-exam-junit4</artifactId>
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<version>${pax.exam.version}</version>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>org.ops4j.pax.exam</groupId>
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<artifactId>pax-exam-invoker-junit</artifactId>
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<version>${pax.exam.version}</version>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>org.ops4j.pax.exam</groupId>
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<artifactId>pax-exam-inject</artifactId>
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<version>${pax.exam.version}</version>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>org.ops4j.pax.exam</groupId>
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<artifactId>pax-exam-extender-service</artifactId>
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<version>${pax.exam.version}</version>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>org.ops4j.pax.exam</groupId>
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<artifactId>pax-exam-link-mvn</artifactId>
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<version>${pax.exam.version}</version>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>org.ops4j.pax.url</groupId>
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<artifactId>pax-url-aether</artifactId>
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<version>${pax.url.version}</version>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>org.ops4j.pax.url</groupId>
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<artifactId>pax-url-wrap</artifactId>
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<version>${pax.url.version}</version>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>org.apache.felix</groupId>
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<artifactId>org.apache.felix.framework</artifactId>
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<version>4.0.3</version>
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<scope>test</scope>
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</dependency>
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</dependencies>
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<build>
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<plugins>
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<!-- Make dependency versions available for Pax Exam. -->
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<plugin>
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<groupId>org.apache.servicemix.tooling</groupId>
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<artifactId>depends-maven-plugin</artifactId>
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<version>1.2</version>
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<executions>
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<execution>
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<id>generate-depends-file</id>
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<phase>generate-resources</phase>
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<goals>
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<goal>generate-depends-file</goal>
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</goals>
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</execution>
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</executions>
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</plugin>
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<!-- Generate OSGI Declarative Services component descriptors. -->
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<plugin>
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<groupId>com.carrotgarden.maven</groupId>
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<artifactId>carrot-maven-scr-plugin</artifactId>
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<version>3.0.3</version>
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<configuration>
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<targetDirectorySCR>OSGI-INF/service-component</targetDirectorySCR>
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</configuration>
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<executions>
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<execution>
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<phase>generate-test-sources</phase>
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<goals>
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<goal>generate</goal>
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</goals>
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</execution>
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</executions>
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</plugin>
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<!-- Include OSGI Declarative Services component descriptors in the bundle. -->
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<plugin>
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<groupId>org.apache.felix</groupId>
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<artifactId>maven-bundle-plugin</artifactId>
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<executions>
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<execution>
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<phase>generate-test-sources</phase>
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<goals>
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<goal>manifest</goal>
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</goals>
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</execution>
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</executions>
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<configuration>
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<instructions>
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<Service-Component>OSGI-INF/service-component/*.xml</Service-Component>
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</instructions>
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</configuration>
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</plugin>
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<!-- Invoke integration tests. -->
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<plugin>
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<artifactId>maven-failsafe-plugin</artifactId>
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<executions>
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<execution>
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<phase>test</phase>
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<goals>
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<goal>integration-test</goal>
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<goal>verify</goal>
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</goals>
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</execution>
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</executions>
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</plugin>
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<!-- Do not deploy this artifact. -->
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<plugin>
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<artifactId>maven-deploy-plugin</artifactId>
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<configuration>
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<skip>true</skip>
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</configuration>
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</plugin>
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</plugins>
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<pluginManagement>
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<plugins>
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<!--This plugin's configuration is used to store Eclipse m2e settings only. It has no influence on the Maven build itself.-->
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<plugin>
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<groupId>org.eclipse.m2e</groupId>
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<artifactId>lifecycle-mapping</artifactId>
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<version>1.0.0</version>
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<configuration>
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<lifecycleMappingMetadata>
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<pluginExecutions>
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<pluginExecution>
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<pluginExecutionFilter>
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<groupId>org.apache.servicemix.tooling</groupId>
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<artifactId>depends-maven-plugin</artifactId>
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<versionRange>[0,)</versionRange>
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<goals>
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<goal>generate-depends-file</goal>
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</goals>
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</pluginExecutionFilter>
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<action>
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<execute />
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</action>
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</pluginExecution>
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<pluginExecution>
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<pluginExecutionFilter>
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<groupId>org.apache.felix</groupId>
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<artifactId>maven-bundle-plugin</artifactId>
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<versionRange>[0,)</versionRange>
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<goals>
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<goal>manifest</goal>
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</goals>
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</pluginExecutionFilter>
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<action>
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<execute />
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</action>
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</pluginExecution>
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</pluginExecutions>
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</lifecycleMappingMetadata>
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</configuration>
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</plugin>
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</plugins>
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</pluginManagement>
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</build>
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</project>
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