Shade Netty transport, with tcnative

The entire transport is shaded because we wouldn't want to collide with
the unshaded form of grpc-netty.

netty/shaded/build.gradle

@@ -0,0 +1,66 @@
+buildscript {
+    repositories {
+        jcenter()
+    }
+    dependencies {
+        classpath 'com.github.jengelman.gradle.plugins:shadow:2.0.1'
+    }
+}
+
+apply plugin: 'com.github.johnrengelman.shadow'
+
+description = "gRPC: Netty Shaded"
+
+sourceSets {
+    testShadow {}
+}
+
+dependencies {
+    compile project(':grpc-netty')
+    runtime libraries.netty_tcnative
+    testShadowCompile files(shadowJar),
+                      configurations.shadow,
+                      project(':grpc-testing-proto'),
+                      project(':grpc-testing'),
+                      libraries.truth
+    shadow project(':grpc-core')
+}
+
+artifacts {
+    // We want uploadArchives to handle the shadowJar; we don't care about
+    // uploadShadow
+    archives shadowJar
+}
+
+shadowJar {
+    classifier = null
+    dependencies {
+        include(project(':grpc-netty'))
+        include(dependency('io.netty:'))
+    }
+    relocate 'io.grpc.netty', 'io.grpc.netty.shaded.io.grpc.netty'
+    relocate 'io.netty', 'io.grpc.netty.shaded.io.netty'
+    // We have to be careful with these replacements as they must not match any
+    // string in NativeLibraryLoader, else they cause corruption. Note that
+    // this includes concatenation of string literals and constants.
+    relocate 'META-INF/native/libnetty', 'META-INF/native/libio_grpc_netty_shaded_netty'
+    relocate 'META-INF/native/netty', 'META-INF/native/io_grpc_netty_shaded_netty'
+    mergeServiceFiles()
+}
+
+// This is a hack to have shadow plugin modify the uploadArchives POM's
+// dependencies. If we delete the uploadShadow task, then the plugin will no
+// longer modify the POM. This probably can break horribly with parallel build,
+// but that's broken anyway with install/uploadArchives
+uploadShadow.repositories.addAll(uploadArchives.repositories)
+// And then we use a further hack to share that POM with install
+install.repositories.mavenInstaller.pom = uploadArchives.repositories.mavenDeployer.pom
+
+task testShadow(type: Test) {
+    testClassesDirs = sourceSets.testShadow.output.classesDirs
+    classpath = sourceSets.testShadow.runtimeClasspath
+}
+compileTestShadowJava.options.compilerArgs = compileTestJava.options.compilerArgs
+compileTestShadowJava.options.encoding = compileTestJava.options.encoding
+
+test.dependsOn testShadow

netty/shaded/src/testShadow/java/io/grpc/netty/shaded/ShadingTest.java

@@ -0,0 +1,112 @@
+/*
+ * Copyright 2017, gRPC Authors 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 io.grpc.netty.shaded;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import io.grpc.ManagedChannel;
+import io.grpc.ManagedChannelBuilder;
+import io.grpc.Server;
+import io.grpc.ServerBuilder;
+import io.grpc.internal.testing.TestUtils;
+import io.grpc.netty.shaded.io.grpc.netty.GrpcSslContexts;
+import io.grpc.netty.shaded.io.grpc.netty.NettyChannelBuilder;
+import io.grpc.netty.shaded.io.grpc.netty.NettyServerBuilder;
+import io.grpc.netty.shaded.io.netty.handler.ssl.SslContextBuilder;
+import io.grpc.netty.shaded.io.netty.handler.ssl.SslProvider;
+import io.grpc.stub.StreamObserver;
+import io.grpc.testing.protobuf.SimpleRequest;
+import io.grpc.testing.protobuf.SimpleResponse;
+import io.grpc.testing.protobuf.SimpleServiceGrpc;
+import io.grpc.testing.protobuf.SimpleServiceGrpc.SimpleServiceBlockingStub;
+import io.grpc.testing.protobuf.SimpleServiceGrpc.SimpleServiceImplBase;
+import java.util.concurrent.TimeUnit;
+import org.junit.After;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.JUnit4;
+
+/** Unit tests for {@link Shading}. */
+@RunWith(JUnit4.class)
+public final class ShadingTest {
+  private ManagedChannel channel;
+  private Server server;
+
+  @After
+  public void tearDown() throws Exception {
+    if (channel != null) {
+      channel.shutdownNow();
+      channel.awaitTermination(1, TimeUnit.SECONDS);
+    }
+    if (server != null) {
+      server.shutdownNow();
+      server.awaitTermination(1, TimeUnit.SECONDS);
+    }
+  }
+
+  /** Verify that normal Netty didn't leak into the test runtime. */
+  @Test(expected = ClassNotFoundException.class)
+  public void noNormalNetty() throws Exception {
+    Class.forName("io.grpc.netty.NettyServerBuilder");
+  }
+
+  @Test
+  public void serviceLoaderFindsNetty() throws Exception {
+    assertThat(ServerBuilder.forPort(0)).isInstanceOf(NettyServerBuilder.class);
+    assertThat(ManagedChannelBuilder.forAddress("localhost", 1234))
+        .isInstanceOf(NettyChannelBuilder.class);
+  }
+
+  @Test
+  public void basic() throws Exception {
+    server = ServerBuilder.forPort(0)
+        .addService(new SimpleServiceImpl())
+        .build().start();
+    channel = ManagedChannelBuilder
+        .forAddress("localhost", server.getPort())
+        .usePlaintext(true)
+        .build();
+    SimpleServiceBlockingStub stub = SimpleServiceGrpc.newBlockingStub(channel);
+    assertThat(SimpleResponse.getDefaultInstance())
+        .isEqualTo(stub.unaryRpc(SimpleRequest.getDefaultInstance()));
+  }
+
+  @Test
+  public void tcnative() throws Exception {
+    server = NettyServerBuilder.forPort(0)
+        .useTransportSecurity(TestUtils.loadCert("server1.pem"), TestUtils.loadCert("server1.key"))
+        .addService(new SimpleServiceImpl())
+        .build().start();
+    channel = NettyChannelBuilder
+        .forAddress("localhost", server.getPort())
+        .sslContext(
+            GrpcSslContexts.configure(SslContextBuilder.forClient(), SslProvider.OPENSSL)
+                .trustManager(TestUtils.loadCert("ca.pem")).build())
+        .overrideAuthority("foo.test.google.fr")
+        .build();
+    SimpleServiceBlockingStub stub = SimpleServiceGrpc.newBlockingStub(channel);
+    assertThat(SimpleResponse.getDefaultInstance())
+        .isEqualTo(stub.unaryRpc(SimpleRequest.getDefaultInstance()));
+  }
+
+  private static class SimpleServiceImpl extends SimpleServiceImplBase {
+    @Override public void unaryRpc(SimpleRequest req, StreamObserver<SimpleResponse> obs) {
+      obs.onNext(SimpleResponse.getDefaultInstance());
+      obs.onCompleted();
+    }
+  }
+}

settings.gradle

@@ -8,6 +8,7 @@ include ":grpc-protobuf"
 include ":grpc-protobuf-lite"
 include ":grpc-protobuf-nano"
 include ":grpc-netty"
+include ":grpc-netty-shaded"
 include ":grpc-grpclb"
 include ":grpc-testing"
 include ":grpc-testing-proto"
@@ -27,6 +28,7 @@ project(':grpc-protobuf').projectDir = "$rootDir/protobuf" as File
 project(':grpc-protobuf-lite').projectDir = "$rootDir/protobuf-lite" as File
 project(':grpc-protobuf-nano').projectDir = "$rootDir/protobuf-nano" as File
 project(':grpc-netty').projectDir = "$rootDir/netty" as File
+project(':grpc-netty-shaded').projectDir = "$rootDir/netty/shaded" as File
 project(':grpc-grpclb').projectDir = "$rootDir/grpclb" as File
 project(':grpc-testing').projectDir = "$rootDir/testing" as File
 project(':grpc-testing-proto').projectDir = "$rootDir/testing-proto" as File