Shade Netty into r2.

linkedin · May 5, 2022 · e1e1502 · e1e1502
1 parent 1858813
commit e1e1502
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diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -14,6 +14,9 @@ and what APIs have changed, if applicable.
 
 ## [Unreleased]
 
+## [29.33.7] - 2022-05-05
+- Introduce restli-netty, a shaded Netty dependency for use with r2.
+
 ## [29.33.6] - 2022-05-03
 - Provide a mechanism to set a routing hint for the d2 request to get request symbol table.
 
@@ -5230,7 +5233,8 @@ patch operations can re-use these classes for generating patch messages.
 
 ## [0.14.1]
 
-[Unreleased]: https://github.com/linkedin/rest.li/compare/v29.33.6...master
+[Unreleased]: https://github.com/linkedin/rest.li/compare/v29.33.7...master
+[29.33.7]: https://github.com/linkedin/rest.li/compare/v29.33.6...v29.33.7
 [29.33.6]: https://github.com/linkedin/rest.li/compare/v29.33.5...v29.33.6
 [29.33.5]: https://github.com/linkedin/rest.li/compare/v29.33.4...v29.33.5
 [29.33.4]: https://github.com/linkedin/rest.li/compare/v29.33.3...v29.33.4

diff --git a/build.gradle b/build.gradle
@@ -16,9 +16,11 @@
 
 buildscript {
   repositories {
+    gradlePluginPortal()
     jcenter()
   }
   dependencies {
+    classpath 'com.github.jengelman.gradle.plugins:shadow:5.2.0'
     classpath 'org.jfrog.buildinfo:build-info-extractor-gradle:4.21.0'
     classpath 'org.jacoco:org.jacoco.core:0.8.7'
   }

diff --git a/build_script/publications.gradle b/build_script/publications.gradle
@@ -61,13 +61,19 @@ def manipulatePomXml = {
 publishing {
   publications {
     // Define the "release" publication
-    release(MavenPublication) {
-      from components.java
+    release(MavenPublication) { publication ->
+      if (project.name == 'restli-netty') {
+        apply plugin: 'com.github.johnrengelman.shadow'
+        project.shadow.component(publication)
+      } else {
+        from components.java
+      }
 
       afterEvaluate {
         // Add all extra archives (sources, javadoc, any custom archives e.g. all)
         project.configurations.archives.allArtifacts.forEach {
-          if (it.classifier) {
+          // Skip 'slim' identifier, otherwise this logic attemps to publish the disabled slim jar for restli-netty.
+          if (it.classifier && it.classifier != 'slim') {
             artifact it
           }
         }

diff --git a/d2-int-test/build.gradle b/d2-int-test/build.gradle
@@ -12,7 +12,6 @@ dependencies {
   compile externalDependency.commonsHttpClient
   compile externalDependency.zookeeper
   compile externalDependency.jdkTools
-  compile externalDependency.netty
   testCompile externalDependency.testng
   testCompile externalDependency.commonsIo
   testCompile project(path: ':d2', configuration: 'testArtifacts')

diff --git a/gradle.properties b/gradle.properties
@@ -1,4 +1,4 @@
-version=29.33.6
+version=29.33.7
 group=com.linkedin.pegasus
 org.gradle.configureondemand=true
 org.gradle.parallel=true

diff --git a/multipart-mime/build.gradle b/multipart-mime/build.gradle
@@ -4,6 +4,9 @@ dependencies {
   compile externalDependency.javaxActivation
   compile externalDependency.commonsLang
   testCompile project(':r2-int-test')
+  testCompile project(':r2-netty')
+  testCompile project(':r2-sample')
+  testCompile project(':test-util')
   testCompile externalDependency.testng
   testCompile externalDependency.mail
   testCompile externalDependency.easymock

diff --git a/r2-int-test/build.gradle b/r2-int-test/build.gradle
@@ -6,6 +6,7 @@ dependencies {
     testCompile externalDependency.testng
     testCompile externalDependency.junit
     compile externalDependency.commonsLang
+    implementation project(path: ':restli-netty', configuration: 'shadow')
 }
 
 tasks.withType(Test) {

diff --git a/r2-int-test/src/test/java/test/r2/integ/clientserver/TestHttpsEarlyHandshake.java b/r2-int-test/src/test/java/test/r2/integ/clientserver/TestHttpsEarlyHandshake.java
@@ -25,11 +25,11 @@
 import com.linkedin.r2.transport.http.client.common.ChannelPoolManagerFactoryImpl;
 import com.linkedin.r2.transport.http.client.common.ChannelPoolManagerKey;
 import com.linkedin.r2.transport.http.client.common.ChannelPoolManagerKeyBuilder;
-import io.netty.channel.Channel;
-import io.netty.channel.EventLoopGroup;
-import io.netty.channel.nio.NioEventLoopGroup;
-import io.netty.handler.ssl.SslHandler;
-import io.netty.util.concurrent.Future;
+import com.linkedin.pegasus.io.netty.channel.Channel;
+import com.linkedin.pegasus.io.netty.channel.EventLoopGroup;
+import com.linkedin.pegasus.io.netty.channel.nio.NioEventLoopGroup;
+import com.linkedin.pegasus.io.netty.handler.ssl.SslHandler;
+import com.linkedin.pegasus.io.netty.util.concurrent.Future;
 import java.net.InetAddress;
 import java.net.InetSocketAddress;
 import java.net.SocketAddress;

diff --git a/...est/src/test/java/test/r2/integ/clientserver/providers/client/AbstractClientProvider.java b/...est/src/test/java/test/r2/integ/clientserver/providers/client/AbstractClientProvider.java
@@ -24,7 +24,7 @@
 import com.linkedin.r2.transport.common.Client;
 import com.linkedin.r2.transport.http.client.HttpClientFactory;
 import com.linkedin.r2.util.NamedThreadFactory;
-import io.netty.channel.nio.NioEventLoopGroup;
+import com.linkedin.pegasus.io.netty.channel.nio.NioEventLoopGroup;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Map;

diff --git a/r2-netty/build.gradle b/r2-netty/build.gradle
@@ -4,9 +4,9 @@ dependencies {
   compile project(':r2-core')
   compile project(':r2-disruptor')
   compile project(':r2-filter-compression')
+  implementation project(path: ':restli-netty', configuration: 'shadow')
 
   compile externalDependency.commonsLang
-  compile externalDependency.netty
 
   testCompile project(path: ':r2-core', configuration: 'testArtifacts')
   testCompile externalDependency.mockito

diff --git a/r2-netty/src/main/java/com/linkedin/r2/netty/client/HttpNettyClient.java b/r2-netty/src/main/java/com/linkedin/r2/netty/client/HttpNettyClient.java
@@ -55,12 +55,12 @@
 import com.linkedin.r2.util.Timeout;
 import com.linkedin.util.ArgumentUtil;
 import com.linkedin.util.clock.Clock;
-import io.netty.channel.Channel;
-import io.netty.channel.ChannelFutureListener;
-import io.netty.channel.ChannelPipeline;
-import io.netty.channel.EventLoopGroup;
-import io.netty.channel.pool.ChannelPool;
-import io.netty.handler.codec.http.HttpScheme;
+import com.linkedin.pegasus.io.netty.channel.Channel;
+import com.linkedin.pegasus.io.netty.channel.ChannelFutureListener;
+import com.linkedin.pegasus.io.netty.channel.ChannelPipeline;
+import com.linkedin.pegasus.io.netty.channel.EventLoopGroup;
+import com.linkedin.pegasus.io.netty.channel.pool.ChannelPool;
+import com.linkedin.pegasus.io.netty.handler.codec.http.HttpScheme;
 import java.net.InetAddress;
 import java.net.InetSocketAddress;
 import java.net.SocketAddress;

diff --git a/r2-netty/src/main/java/com/linkedin/r2/netty/client/http/HttpChannelInitializer.java b/r2-netty/src/main/java/com/linkedin/r2/netty/client/http/HttpChannelInitializer.java
@@ -25,10 +25,10 @@
 import com.linkedin.r2.netty.handler.common.SslHandshakeTimingHandler;
 import com.linkedin.r2.netty.handler.http.HttpMessageDecoders;
 import com.linkedin.r2.netty.handler.http.HttpMessageEncoders;
-import io.netty.channel.ChannelInitializer;
-import io.netty.channel.socket.nio.NioSocketChannel;
-import io.netty.handler.codec.http.HttpClientCodec;
-import io.netty.handler.codec.http.HttpScheme;
+import com.linkedin.pegasus.io.netty.channel.ChannelInitializer;
+import com.linkedin.pegasus.io.netty.channel.socket.nio.NioSocketChannel;
+import com.linkedin.pegasus.io.netty.handler.codec.http.HttpClientCodec;
+import com.linkedin.pegasus.io.netty.handler.codec.http.HttpScheme;
 import javax.net.ssl.SSLContext;
 import javax.net.ssl.SSLParameters;
 
@@ -37,15 +37,15 @@
  * the channel pipeline is setup with the following additional handlers.
  *
  * DefaultChannelPipeline {
- *   (sslHandler = {@link io.netty.handler.ssl.SslHandler}),
+ *   (sslHandler = {@link com.linkedin.pegasus.io.netty.handler.ssl.SslHandler}),
  *   (CertificateHandler = {@link CertificateHandler}),
  *   (sslHandshakeTimingHandler = {@link SslHandshakeTimingHandler})
  * }
  *
  * The rest of the handlers are common between SSL and non-SSL.
  *
  * DefaultChannelPipeline {
- *   (codec = {@link io.netty.handler.codec.http.HttpClientCodec}),
+ *   (codec = {@link com.linkedin.pegasus.io.netty.handler.codec.http.HttpClientCodec}),
  *   (outboundRestRequestEncoder = {@link HttpMessageEncoders.RestRequestEncoder}),
  *   (outboundStreamDataEncoder = {@link HttpMessageEncoders.DataEncoder}),
  *   (outboundStreamRequestEncoder = {@link HttpMessageEncoders.StreamRequestEncoder}),

diff --git a/r2-netty/src/main/java/com/linkedin/r2/netty/client/http/HttpChannelPoolFactory.java b/r2-netty/src/main/java/com/linkedin/r2/netty/client/http/HttpChannelPoolFactory.java
@@ -23,13 +23,13 @@
 import com.linkedin.r2.transport.http.client.common.ChannelPoolFactory;
 import com.linkedin.r2.transport.http.client.common.ChannelPoolLifecycle;
 import com.linkedin.util.clock.SystemClock;
-import io.netty.bootstrap.Bootstrap;
-import io.netty.channel.Channel;
-import io.netty.channel.ChannelInitializer;
-import io.netty.channel.ChannelOption;
-import io.netty.channel.EventLoopGroup;
-import io.netty.channel.group.ChannelGroup;
-import io.netty.channel.socket.nio.NioSocketChannel;
+import com.linkedin.pegasus.io.netty.bootstrap.Bootstrap;
+import com.linkedin.pegasus.io.netty.channel.Channel;
+import com.linkedin.pegasus.io.netty.channel.ChannelInitializer;
+import com.linkedin.pegasus.io.netty.channel.ChannelOption;
+import com.linkedin.pegasus.io.netty.channel.EventLoopGroup;
+import com.linkedin.pegasus.io.netty.channel.group.ChannelGroup;
+import com.linkedin.pegasus.io.netty.channel.socket.nio.NioSocketChannel;
 import java.net.SocketAddress;
 import java.util.concurrent.ScheduledExecutorService;
 import javax.net.ssl.SSLContext;

diff --git a/r2-netty/src/main/java/com/linkedin/r2/netty/client/http2/Http2ChannelInitializer.java b/r2-netty/src/main/java/com/linkedin/r2/netty/client/http2/Http2ChannelInitializer.java
@@ -29,23 +29,23 @@
 import com.linkedin.r2.netty.handler.http2.Http2MessageEncoders;
 import com.linkedin.r2.netty.handler.http2.Http2ProtocolUpgradeHandler;
 import com.linkedin.r2.netty.handler.http2.UnsupportedHandler;
-import io.netty.channel.ChannelInitializer;
-import io.netty.channel.ChannelPromise;
-import io.netty.channel.socket.nio.NioSocketChannel;
-import io.netty.handler.codec.http.HttpClientCodec;
-import io.netty.handler.codec.http.HttpClientUpgradeHandler;
-import io.netty.handler.codec.http2.Http2ClientUpgradeCodec;
-import io.netty.handler.codec.http2.Http2ConnectionHandler;
-import io.netty.handler.codec.http2.Http2FrameCodec;
-import io.netty.handler.codec.http2.Http2FrameCodecBuilder;
-import io.netty.handler.codec.http2.Http2MultiplexHandler;
-import io.netty.handler.codec.http2.Http2Settings;
-import io.netty.handler.ssl.ApplicationProtocolConfig;
-import io.netty.handler.ssl.ApplicationProtocolNames;
-import io.netty.handler.ssl.ClientAuth;
-import io.netty.handler.ssl.IdentityCipherSuiteFilter;
-import io.netty.handler.ssl.JdkSslContext;
-import io.netty.handler.ssl.SslContext;
+import com.linkedin.pegasus.io.netty.channel.ChannelInitializer;
+import com.linkedin.pegasus.io.netty.channel.ChannelPromise;
+import com.linkedin.pegasus.io.netty.channel.socket.nio.NioSocketChannel;
+import com.linkedin.pegasus.io.netty.handler.codec.http.HttpClientCodec;
+import com.linkedin.pegasus.io.netty.handler.codec.http.HttpClientUpgradeHandler;
+import com.linkedin.pegasus.io.netty.handler.codec.http2.Http2ClientUpgradeCodec;
+import com.linkedin.pegasus.io.netty.handler.codec.http2.Http2ConnectionHandler;
+import com.linkedin.pegasus.io.netty.handler.codec.http2.Http2FrameCodec;
+import com.linkedin.pegasus.io.netty.handler.codec.http2.Http2FrameCodecBuilder;
+import com.linkedin.pegasus.io.netty.handler.codec.http2.Http2MultiplexHandler;
+import com.linkedin.pegasus.io.netty.handler.codec.http2.Http2Settings;
+import com.linkedin.pegasus.io.netty.handler.ssl.ApplicationProtocolConfig;
+import com.linkedin.pegasus.io.netty.handler.ssl.ApplicationProtocolNames;
+import com.linkedin.pegasus.io.netty.handler.ssl.ClientAuth;
+import com.linkedin.pegasus.io.netty.handler.ssl.IdentityCipherSuiteFilter;
+import com.linkedin.pegasus.io.netty.handler.ssl.JdkSslContext;
+import com.linkedin.pegasus.io.netty.handler.ssl.SslContext;
 
 import java.util.Arrays;
 import javax.net.ssl.SSLContext;
@@ -65,7 +65,7 @@
  * are added and the pipeline should be setup with the following handlers.
  *
  * DefaultChannelPipeline {
- *   (sslHandler = {@link io.netty.handler.ssl.SslHandler}),
+ *   (sslHandler = {@link com.linkedin.pegasus.io.netty.handler.ssl.SslHandler}),
  *   (CertificateHandler = {@link CertificateHandler}),
  *   (sslHandshakeTimingHandler = {@link SslHandshakeTimingHandler}),
  *   (Http2FrameCodec = {@link Http2FrameCodec})

diff --git a/r2-netty/src/main/java/com/linkedin/r2/netty/client/http2/Http2ChannelLifecycle.java b/r2-netty/src/main/java/com/linkedin/r2/netty/client/http2/Http2ChannelLifecycle.java
@@ -23,10 +23,10 @@
 import com.linkedin.r2.transport.http.client.PoolStats;
 import com.linkedin.r2.transport.http.client.TimeoutCallback;
 import com.linkedin.util.clock.Clock;
-import io.netty.channel.Channel;
-import io.netty.channel.group.ChannelGroup;
-import io.netty.handler.codec.http2.Http2StreamChannel;
-import io.netty.handler.codec.http2.Http2StreamChannelBootstrap;
+import com.linkedin.pegasus.io.netty.channel.Channel;
+import com.linkedin.pegasus.io.netty.channel.group.ChannelGroup;
+import com.linkedin.pegasus.io.netty.handler.codec.http2.Http2StreamChannel;
+import com.linkedin.pegasus.io.netty.handler.codec.http2.Http2StreamChannelBootstrap;
 import java.net.SocketAddress;
 import java.util.ArrayDeque;
 import java.util.ArrayList;

diff --git a/r2-netty/src/main/java/com/linkedin/r2/netty/client/http2/Http2ChannelPoolFactory.java b/r2-netty/src/main/java/com/linkedin/r2/netty/client/http2/Http2ChannelPoolFactory.java
@@ -23,13 +23,13 @@
 import com.linkedin.r2.transport.http.client.common.ChannelPoolFactory;
 import com.linkedin.r2.transport.http.client.common.ChannelPoolLifecycle;
 import com.linkedin.util.clock.SystemClock;
-import io.netty.bootstrap.Bootstrap;
-import io.netty.channel.Channel;
-import io.netty.channel.ChannelInitializer;
-import io.netty.channel.ChannelOption;
-import io.netty.channel.EventLoopGroup;
-import io.netty.channel.group.ChannelGroup;
-import io.netty.channel.socket.nio.NioSocketChannel;
+import com.linkedin.pegasus.io.netty.bootstrap.Bootstrap;
+import com.linkedin.pegasus.io.netty.channel.Channel;
+import com.linkedin.pegasus.io.netty.channel.ChannelInitializer;
+import com.linkedin.pegasus.io.netty.channel.ChannelOption;
+import com.linkedin.pegasus.io.netty.channel.EventLoopGroup;
+import com.linkedin.pegasus.io.netty.channel.group.ChannelGroup;
+import com.linkedin.pegasus.io.netty.channel.socket.nio.NioSocketChannel;
 import java.net.SocketAddress;
 import java.util.concurrent.ScheduledExecutorService;
 import javax.net.ssl.SSLContext;

diff --git a/r2-netty/src/main/java/com/linkedin/r2/netty/client/http2/Http2StreamChannelInitializer.java b/r2-netty/src/main/java/com/linkedin/r2/netty/client/http2/Http2StreamChannelInitializer.java
@@ -22,9 +22,9 @@
 import com.linkedin.r2.netty.handler.common.SchemeHandler;
 import com.linkedin.r2.netty.handler.http2.Http2MessageDecoders;
 import com.linkedin.r2.netty.handler.http2.Http2MessageEncoders;
-import io.netty.channel.Channel;
-import io.netty.channel.ChannelInitializer;
-import io.netty.handler.codec.http.HttpScheme;
+import com.linkedin.pegasus.io.netty.channel.Channel;
+import com.linkedin.pegasus.io.netty.channel.ChannelInitializer;
+import com.linkedin.pegasus.io.netty.handler.codec.http.HttpScheme;
 
 /**
  * Netty handler to setup the Http2 Stream Channel pipeline

diff --git a/r2-netty/src/main/java/com/linkedin/r2/netty/common/ChannelPipelineEvent.java b/r2-netty/src/main/java/com/linkedin/r2/netty/common/ChannelPipelineEvent.java
@@ -16,8 +16,8 @@
 
 package com.linkedin.r2.netty.common;
 
-import io.netty.channel.Channel;
-import io.netty.channel.ChannelPipeline;
+import com.linkedin.pegasus.io.netty.channel.Channel;
+import com.linkedin.pegasus.io.netty.channel.ChannelPipeline;
 
 /**
  * Enumerates the user events potentially raised in the {@link ChannelPipeline}.

diff --git a/r2-netty/src/main/java/com/linkedin/r2/netty/common/NettyChannelAttributes.java b/r2-netty/src/main/java/com/linkedin/r2/netty/common/NettyChannelAttributes.java
@@ -23,11 +23,11 @@
 import com.linkedin.r2.transport.http.client.AsyncPool;
 import com.linkedin.r2.transport.http.client.common.ssl.SslSessionValidator;
 import com.linkedin.r2.util.Timeout;
-import io.netty.channel.Channel;
-import io.netty.channel.ChannelFuture;
-import io.netty.channel.ChannelPipeline;
-import io.netty.util.AttributeKey;
-import io.netty.util.concurrent.Promise;
+import com.linkedin.pegasus.io.netty.channel.Channel;
+import com.linkedin.pegasus.io.netty.channel.ChannelFuture;
+import com.linkedin.pegasus.io.netty.channel.ChannelPipeline;
+import com.linkedin.pegasus.io.netty.util.AttributeKey;
+import com.linkedin.pegasus.io.netty.util.concurrent.Promise;
 import java.util.concurrent.ScheduledFuture;
 
 /**

diff --git a/r2-netty/src/main/java/com/linkedin/r2/netty/common/NettyRequestAdapter.java b/r2-netty/src/main/java/com/linkedin/r2/netty/common/NettyRequestAdapter.java
@@ -21,19 +21,19 @@
 import com.linkedin.r2.message.stream.StreamRequest;
 import com.linkedin.r2.transport.http.common.HttpConstants;
 import com.linkedin.r2.transport.http.util.CookieUtil;
-import io.netty.buffer.ByteBuf;
-import io.netty.buffer.Unpooled;
-import io.netty.handler.codec.http.DefaultFullHttpRequest;
-import io.netty.handler.codec.http.DefaultHttpRequest;
-import io.netty.handler.codec.http.HttpHeaderNames;
-import io.netty.handler.codec.http.HttpHeaderValues;
-import io.netty.handler.codec.http.HttpMethod;
-import io.netty.handler.codec.http.HttpRequest;
-import io.netty.handler.codec.http.HttpVersion;
-import io.netty.handler.codec.http2.DefaultHttp2Headers;
-import io.netty.handler.codec.http2.Http2Headers;
-import io.netty.handler.codec.http2.HttpConversionUtil;
-import io.netty.util.AsciiString;
+import com.linkedin.pegasus.io.netty.buffer.ByteBuf;
+import com.linkedin.pegasus.io.netty.buffer.Unpooled;
+import com.linkedin.pegasus.io.netty.handler.codec.http.DefaultFullHttpRequest;
+import com.linkedin.pegasus.io.netty.handler.codec.http.DefaultHttpRequest;
+import com.linkedin.pegasus.io.netty.handler.codec.http.HttpHeaderNames;
+import com.linkedin.pegasus.io.netty.handler.codec.http.HttpHeaderValues;
+import com.linkedin.pegasus.io.netty.handler.codec.http.HttpMethod;
+import com.linkedin.pegasus.io.netty.handler.codec.http.HttpRequest;
+import com.linkedin.pegasus.io.netty.handler.codec.http.HttpVersion;
+import com.linkedin.pegasus.io.netty.handler.codec.http2.DefaultHttp2Headers;
+import com.linkedin.pegasus.io.netty.handler.codec.http2.Http2Headers;
+import com.linkedin.pegasus.io.netty.handler.codec.http2.HttpConversionUtil;
+import com.linkedin.pegasus.io.netty.util.AsciiString;
 import java.net.URI;
 import java.net.URL;
 import java.util.HashSet;

diff --git a/r2-netty/src/main/java/com/linkedin/r2/netty/common/SslHandlerUtil.java b/r2-netty/src/main/java/com/linkedin/r2/netty/common/SslHandlerUtil.java
@@ -16,7 +16,7 @@
 
 package com.linkedin.r2.netty.common;
 
-import io.netty.handler.ssl.SslHandler;
+import com.linkedin.pegasus.io.netty.handler.ssl.SslHandler;
 import java.util.Arrays;
 import java.util.HashSet;
 import java.util.Set;

diff --git a/r2-netty/src/main/java/com/linkedin/r2/netty/common/StreamingTimeout.java b/r2-netty/src/main/java/com/linkedin/r2/netty/common/StreamingTimeout.java
@@ -18,8 +18,8 @@
 
 import com.linkedin.util.clock.Clock;
 import com.linkedin.util.clock.SystemClock;
-import io.netty.channel.Channel;
-import io.netty.channel.ChannelHandlerContext;
+import com.linkedin.pegasus.io.netty.channel.Channel;
+import com.linkedin.pegasus.io.netty.channel.ChannelHandlerContext;
 import java.util.concurrent.ScheduledExecutorService;
 import java.util.concurrent.ScheduledFuture;
 import java.util.concurrent.TimeUnit;

diff --git a/r2-netty/src/main/java/com/linkedin/r2/netty/entitystream/StreamReader.java b/r2-netty/src/main/java/com/linkedin/r2/netty/entitystream/StreamReader.java
@@ -23,7 +23,7 @@
 import com.linkedin.r2.netty.common.NettyChannelAttributes;
 import com.linkedin.r2.netty.common.StreamingTimeout;
 import com.linkedin.util.clock.SystemClock;
-import io.netty.channel.ChannelHandlerContext;
+import com.linkedin.pegasus.io.netty.channel.ChannelHandlerContext;
 
 /**
  * Entity stream {@link Reader} implementation that reads from the entity stream