reactor.ipc.netty.NettyContextTest.java Source code

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Here is the source code for reactor.ipc.netty.NettyContextTest.java

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/*
 * Copyright (c) 2011-2017 Pivotal Software Inc, All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package reactor.ipc.netty;

import java.util.Arrays;
import java.util.concurrent.atomic.AtomicLong;
import java.util.function.BiConsumer;

import io.netty.channel.Channel;
import io.netty.channel.ChannelDuplexHandler;
import io.netty.channel.ChannelHandler;
import io.netty.channel.ChannelHandlerAdapter;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.embedded.EmbeddedChannel;
import io.netty.handler.codec.LineBasedFrameDecoder;
import io.netty.handler.codec.http.HttpRequestDecoder;
import io.netty.handler.codec.http.HttpResponseEncoder;
import io.netty.handler.codec.http.websocketx.Utf8FrameValidator;
import org.junit.Before;
import org.junit.Test;

import static org.hamcrest.CoreMatchers.instanceOf;
import static org.hamcrest.CoreMatchers.is;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertThat;

/**
 * @author Simon Basl
 */
public class NettyContextTest {

    NettyContext testContext;
    EmbeddedChannel channel;

    static final BiConsumer<? super ChannelHandlerContext, Object> ADD_EXTRACTOR = ChannelHandlerContext::fireChannelRead;

    @Before
    public void init() {
        channel = new EmbeddedChannel();
        testContext = () -> channel;
    }

    @Test
    public void addByteDecoderWhenNoLeft() throws Exception {

        channel.pipeline().addLast(NettyPipeline.ReactiveBridge, new ChannelHandlerAdapter() {
        });
        ChannelHandler decoder = new LineBasedFrameDecoder(12);

        testContext.addHandlerLast("decoder", decoder).addHandlerFirst("decoder$extract",
                NettyPipeline.inboundHandler(ADD_EXTRACTOR));

        assertEquals(channel.pipeline().names(), Arrays.asList("decoder$extract", "decoder",
                NettyPipeline.ReactiveBridge, "DefaultChannelPipeline$TailContext#0"));
    }

    @Test
    public void addByteDecoderWhenNoRight() throws Exception {

        channel.pipeline().addLast(NettyPipeline.HttpDecoder, new ChannelHandlerAdapter() {
        });
        ChannelHandler decoder = new LineBasedFrameDecoder(12);

        testContext.addHandlerLast("decoder", decoder).addHandlerFirst("decoder$extract",
                NettyPipeline.inboundHandler(ADD_EXTRACTOR));

        assertEquals(channel.pipeline().names(), Arrays.asList(NettyPipeline.HttpDecoder, "decoder$extract",
                "decoder", "DefaultChannelPipeline$TailContext#0"));
    }

    @Test
    public void addByteDecoderWhenEmptyPipeline() throws Exception {

        ChannelHandler decoder = new LineBasedFrameDecoder(12);

        testContext.addHandlerLast("decoder", decoder).addHandlerFirst("decoder$extract",
                NettyPipeline.inboundHandler(ADD_EXTRACTOR));

        assertEquals(channel.pipeline().names(),
                Arrays.asList("decoder$extract", "decoder", "DefaultChannelPipeline$TailContext#0"));
    }

    @Test
    public void addByteDecoderWhenFullReactorPipeline() throws Exception {

        channel.pipeline().addLast(NettyPipeline.HttpDecoder, new HttpRequestDecoder())
                .addLast(NettyPipeline.HttpEncoder, new HttpResponseEncoder())
                .addLast(NettyPipeline.HttpServerHandler, new ChannelDuplexHandler())
                .addLast(NettyPipeline.ReactiveBridge, new ChannelHandlerAdapter() {
                });
        ChannelHandler decoder = new LineBasedFrameDecoder(12);

        testContext.addHandlerLast("decoder", decoder).addHandlerFirst("decoder$extract",
                NettyPipeline.inboundHandler(ADD_EXTRACTOR));

        assertEquals(channel.pipeline().names(),
                Arrays.asList(NettyPipeline.HttpDecoder, NettyPipeline.HttpEncoder, NettyPipeline.HttpServerHandler,
                        "decoder$extract", "decoder", NettyPipeline.ReactiveBridge,
                        "DefaultChannelPipeline$TailContext#0"));
    }

    @Test
    public void addNonByteDecoderWhenNoLeft() throws Exception {

        channel.pipeline().addLast(NettyPipeline.ReactiveBridge, new ChannelHandlerAdapter() {
        });
        ChannelHandler decoder = new ChannelHandlerAdapter() {
        };

        testContext.addHandlerLast("decoder", decoder);

        assertEquals(channel.pipeline().names(),
                Arrays.asList("decoder", NettyPipeline.ReactiveBridge, "DefaultChannelPipeline$TailContext#0"));
    }

    @Test
    public void addNonByteDecoderWhenNoRight() throws Exception {

        channel.pipeline().addLast(NettyPipeline.HttpDecoder, new ChannelHandlerAdapter() {
        });
        ChannelHandler decoder = new ChannelHandlerAdapter() {
        };

        testContext.addHandlerLast("decoder", decoder);

        assertEquals(channel.pipeline().names(),
                Arrays.asList(NettyPipeline.HttpDecoder, "decoder", "DefaultChannelPipeline$TailContext#0"));
    }

    @Test
    public void addNonByteDecoderWhenEmptyPipeline() throws Exception {

        ChannelHandler decoder = new ChannelHandlerAdapter() {
        };

        testContext.addHandlerLast("decoder", decoder);

        assertEquals(channel.pipeline().names(), Arrays.asList("decoder", "DefaultChannelPipeline$TailContext#0"));
    }

    @Test
    public void addNonByteDecoderWhenFullReactorPipeline() throws Exception {

        channel.pipeline().addLast(NettyPipeline.HttpDecoder, new HttpRequestDecoder())
                .addLast(NettyPipeline.HttpEncoder, new HttpResponseEncoder())
                .addLast(NettyPipeline.HttpServerHandler, new ChannelDuplexHandler())
                .addLast(NettyPipeline.ReactiveBridge, new ChannelHandlerAdapter() {
                });
        ChannelHandler decoder = new ChannelHandlerAdapter() {
        };

        testContext.addHandlerLast("decoder", decoder);

        assertEquals(channel.pipeline().names(),
                Arrays.asList(NettyPipeline.HttpDecoder, NettyPipeline.HttpEncoder, NettyPipeline.HttpServerHandler,
                        "decoder", NettyPipeline.ReactiveBridge, "DefaultChannelPipeline$TailContext#0"));
    }

    @Test
    public void addSeveralByteDecodersWhenCodec() throws Exception {
        ChannelHandler decoder1 = new LineBasedFrameDecoder(12);
        ChannelHandler decoder2 = new LineBasedFrameDecoder(13);

        channel.pipeline().addLast(NettyPipeline.HttpDecoder, new HttpRequestDecoder())
                .addLast(NettyPipeline.HttpEncoder, new HttpResponseEncoder())
                .addLast(NettyPipeline.HttpServerHandler, new ChannelDuplexHandler())
                .addLast(NettyPipeline.ReactiveBridge, new ChannelHandlerAdapter() {
                });

        testContext.addHandlerLast("decoder1$extract", NettyPipeline.inboundHandler(ADD_EXTRACTOR))
                .addHandlerLast("decoder1", decoder1)

                .addHandlerLast("decoder2$extract", NettyPipeline.inboundHandler(ADD_EXTRACTOR))
                .addHandlerLast("decoder2", decoder2);

        assertEquals(channel.pipeline().names(),
                Arrays.asList(NettyPipeline.HttpDecoder, NettyPipeline.HttpEncoder, NettyPipeline.HttpServerHandler,
                        "decoder1$extract", "decoder1", "decoder2$extract", "decoder2",
                        NettyPipeline.ReactiveBridge, "DefaultChannelPipeline$TailContext#0"));
    }

    @Test
    public void addByteEncoderWhenNoLeft() throws Exception {

        channel.pipeline().addLast(NettyPipeline.ReactiveBridge, new ChannelHandlerAdapter() {
        });
        ChannelHandler encoder = new LineBasedFrameDecoder(12);

        testContext.addHandlerFirst("encoder", encoder);

        assertEquals(channel.pipeline().names(),
                Arrays.asList("encoder", NettyPipeline.ReactiveBridge, "DefaultChannelPipeline$TailContext#0"));
    }

    @Test
    public void addByteEncoderWhenNoRight() throws Exception {

        channel.pipeline().addLast(NettyPipeline.HttpDecoder, new ChannelHandlerAdapter() {
        });
        ChannelHandler encoder = new LineBasedFrameDecoder(12);

        testContext.addHandlerFirst("encoder", encoder);

        assertEquals(channel.pipeline().names(),
                Arrays.asList(NettyPipeline.HttpDecoder, "encoder", "DefaultChannelPipeline$TailContext#0"));
    }

    @Test
    public void addByteEncoderWhenEmptyPipeline() throws Exception {

        ChannelHandler encoder = new LineBasedFrameDecoder(12);

        testContext.addHandlerFirst("encoder", encoder);

        assertEquals(channel.pipeline().names(), Arrays.asList("encoder", "DefaultChannelPipeline$TailContext#0"));
    }

    @Test
    public void addByteEncoderWhenFullReactorPipeline() throws Exception {

        channel.pipeline().addLast(NettyPipeline.HttpDecoder, new HttpRequestDecoder())
                .addLast(NettyPipeline.HttpEncoder, new HttpResponseEncoder())
                .addLast(NettyPipeline.HttpServerHandler, new ChannelDuplexHandler())
                .addLast(NettyPipeline.ReactiveBridge, new ChannelHandlerAdapter() {
                });
        ChannelHandler encoder = new LineBasedFrameDecoder(12);

        testContext.addHandlerFirst("encoder", encoder);

        assertEquals(channel.pipeline().names(),
                Arrays.asList(NettyPipeline.HttpDecoder, NettyPipeline.HttpEncoder, NettyPipeline.HttpServerHandler,
                        "encoder", NettyPipeline.ReactiveBridge, "DefaultChannelPipeline$TailContext#0"));
    }

    @Test
    public void addNonByteEncoderWhenNoLeft() throws Exception {

        channel.pipeline().addLast(NettyPipeline.ReactiveBridge, new ChannelHandlerAdapter() {
        });
        ChannelHandler encoder = new ChannelHandlerAdapter() {
        };

        testContext.addHandlerFirst("encoder", encoder);

        assertEquals(channel.pipeline().names(),
                Arrays.asList("encoder", NettyPipeline.ReactiveBridge, "DefaultChannelPipeline$TailContext#0"));
    }

    @Test
    public void addNonByteEncoderWhenNoRight() throws Exception {

        channel.pipeline().addLast(NettyPipeline.HttpDecoder, new ChannelHandlerAdapter() {
        });
        ChannelHandler encoder = new ChannelHandlerAdapter() {
        };

        testContext.addHandlerFirst("encoder", encoder);

        assertEquals(channel.pipeline().names(),
                Arrays.asList(NettyPipeline.HttpDecoder, "encoder", "DefaultChannelPipeline$TailContext#0"));
    }

    @Test
    public void addNonByteEncoderWhenEmptyPipeline() throws Exception {

        ChannelHandler encoder = new ChannelHandlerAdapter() {
        };

        testContext.addHandlerFirst("encoder", encoder);

        assertEquals(channel.pipeline().names(), Arrays.asList("encoder", "DefaultChannelPipeline$TailContext#0"));
    }

    @Test
    public void addNonByteEncoderWhenFullReactorPipeline() throws Exception {

        channel.pipeline().addLast(NettyPipeline.HttpDecoder, new HttpRequestDecoder())
                .addLast(NettyPipeline.HttpEncoder, new HttpResponseEncoder())
                .addLast(NettyPipeline.HttpServerHandler, new ChannelDuplexHandler())
                .addLast(NettyPipeline.ReactiveBridge, new ChannelHandlerAdapter() {
                });
        ChannelHandler encoder = new ChannelHandlerAdapter() {
        };

        testContext.addHandlerFirst("encoder", encoder);

        assertEquals(channel.pipeline().names(),
                Arrays.asList(NettyPipeline.HttpDecoder, NettyPipeline.HttpEncoder, NettyPipeline.HttpServerHandler,
                        "encoder", NettyPipeline.ReactiveBridge, "DefaultChannelPipeline$TailContext#0"));
    }

    @Test
    public void addSeveralByteEncodersWhenCodec() throws Exception {
        ChannelHandler encoder1 = new LineBasedFrameDecoder(12);
        ChannelHandler encoder2 = new LineBasedFrameDecoder(13);

        channel.pipeline().addLast(NettyPipeline.HttpDecoder, new HttpRequestDecoder())
                .addLast(NettyPipeline.HttpEncoder, new HttpResponseEncoder())
                .addLast(NettyPipeline.HttpServerHandler, new ChannelDuplexHandler())
                .addLast(NettyPipeline.ReactiveBridge, new ChannelHandlerAdapter() {
                });

        testContext.addHandlerFirst("encoder1", encoder1).addHandlerFirst("encoder2", encoder2);

        assertEquals(channel.pipeline().names(),
                Arrays.asList(NettyPipeline.HttpDecoder, NettyPipeline.HttpEncoder, NettyPipeline.HttpServerHandler,
                        "encoder2", "encoder1", NettyPipeline.ReactiveBridge,
                        "DefaultChannelPipeline$TailContext#0"));
    }

    @Test
    public void encoderSupportSkipsOnCloseIfAttributeClosedChannel() {
        AtomicLong closeCount = new AtomicLong();
        NettyContext c = new NettyContext() {
            @Override
            public Channel channel() {
                return channel;
            }

            @Override
            public NettyContext onClose(Runnable onClose) {
                closeCount.incrementAndGet();
                return this;
            }

            @Override
            public NettyContext removeHandler(String name) {
                return this;
            }
        };

        c.markPersistent(false).addHandlerFirst("byteencoder", new Utf8FrameValidator()).addHandlerFirst("encoder",
                new ChannelHandlerAdapter() {
                });

        assertThat(NettyContext.isPersistent(channel), is(false));
        assertThat(closeCount.intValue(), is(0));
    }

    @Test
    public void decoderSupportSkipsOnCloseIfAttributeClosedChannel() {
        AtomicLong closeCount = new AtomicLong();
        NettyContext c = new NettyContext() {
            @Override
            public Channel channel() {
                return channel;
            }

            @Override
            public NettyContext onClose(Runnable onClose) {
                closeCount.incrementAndGet();
                return this;
            }

            @Override
            public NettyContext removeHandler(String name) {
                return this;
            }
        };

        c.markPersistent(false).addHandlerLast("byteDecoder", new Utf8FrameValidator()).addHandlerLast("decoder",
                new ChannelHandlerAdapter() {
                });

        assertThat(NettyContext.isPersistent(channel), is(false));
        assertThat(closeCount.intValue(), is(0));
    }

    @Test
    public void addDecoderSkipsIfExist() {
        channel.pipeline().addFirst("foo", new Utf8FrameValidator());

        testContext.addHandlerFirst("foo", new LineBasedFrameDecoder(10));

        assertEquals(channel.pipeline().names(), Arrays.asList("foo", "DefaultChannelPipeline$TailContext#0"));
        assertThat(channel.pipeline().get("foo"), is(instanceOf(Utf8FrameValidator.class)));
    }

    @Test
    public void addEncoderSkipsIfExist() {
        channel.pipeline().addFirst("foo", new Utf8FrameValidator());

        testContext.addHandlerFirst("foo", new LineBasedFrameDecoder(10));

        assertEquals(channel.pipeline().names(), Arrays.asList("foo", "DefaultChannelPipeline$TailContext#0"));
        assertThat(channel.pipeline().get("foo"), is(instanceOf(Utf8FrameValidator.class)));
    }

}