Draft of Android specific Channe builder

.travis.yml

@@ -1,6 +1,13 @@
 sudo: false
 
-language: java
+language: android
+
+android:
+  components:
+     - build-tools-21.1.1  # preinstalled in travis env
+     - android-21
+
+script: ./gradlew build
 
 env:
   global:

android-interop-testing/app/build.gradle

@@ -1,6 +1,10 @@
+apply plugin: 'android-sdk-manager'
 apply plugin: 'com.android.application'
 apply plugin: 'com.google.protobuf'
 
+def properties = new Properties()
+properties.load(new FileInputStream(file('../../version.properties')))
+
 android {
     compileSdkVersion 22
     buildToolsVersion '22.0.1'
@@ -33,7 +37,7 @@ protobuf {
     }
     plugins {
         grpc {
-            artifact = 'io.grpc:protoc-gen-grpc-java:0.9.0-SNAPSHOT'
+            artifact = "io.grpc:protoc-gen-grpc-java:${properties.version}"
         }
     }
     generateProtoTasks {
@@ -64,10 +68,9 @@ dependencies {
     compile 'com.squareup.okhttp:okhttp:2.2.0'
     testCompile 'junit:junit:4.12'
     // You need to build grpc-java to obtain these libraries below.
-    compile 'io.grpc:grpc-core:0.9.0-SNAPSHOT'
-    compile 'io.grpc:grpc-protobuf-nano:0.9.0-SNAPSHOT'
-    compile 'io.grpc:grpc-okhttp:0.9.0-SNAPSHOT'
-    compile 'io.grpc:grpc-stub:0.9.0-SNAPSHOT'
-    compile 'io.grpc:grpc-testing:0.9.0-SNAPSHOT'
+    compile "io.grpc:grpc-android:${properties.version}"
+    compile "io.grpc:grpc-protobuf-nano:${properties.version}"
+    compile "io.grpc:grpc-stub:${properties.version}"
+    compile "io.grpc:grpc-testing:${properties.version}"
     compile 'javax.annotation:javax.annotation-api:1.2'
 }

android-interop-testing/build.gradle

@@ -5,6 +5,7 @@ buildscript {
         jcenter()
     }
     dependencies {
+        classpath 'com.jakewharton.sdkmanager:gradle-plugin:0.12.+'
         classpath 'com.android.tools.build:gradle:1.1.0'
         classpath "com.google.protobuf:protobuf-gradle-plugin:0.6.1"
 

android/build.gradle

@@ -0,0 +1,27 @@
+// We fork the android build to avoid classpath conflicts from buildscript.
+task prereqs(dependsOn: [':grpc-okhttp:install', ':grpc-core:install']) {}
+
+task assemble(type: GradleBuild, dependsOn: 'prereqs') {
+    buildFile = 'delegate.gradle'
+    tasks = ['assemble']
+}
+
+task build(type: GradleBuild, dependsOn: 'prereqs') {
+    buildFile = 'delegate.gradle'
+    tasks = ['build']
+}
+
+task install(type: GradleBuild, dependsOn: 'prereqs') {
+    buildFile = 'delegate.gradle'
+    tasks = ['install']
+}
+
+task uploadArchives(type: GradleBuild, dependsOn: 'prereqs') {
+    buildFile = 'delegate.gradle'
+    tasks = ['uploadArchives']
+}
+
+task clean(type: GradleBuild) {
+    buildFile = 'delegate.gradle'
+    tasks = ['clean']
+}

android/delegate.gradle

@@ -0,0 +1,151 @@
+buildscript {
+    repositories {
+        mavenCentral()
+        mavenLocal()
+    }
+    dependencies {
+        classpath 'com.android.tools.build:gradle:1.3.+'
+        classpath 'com.jakewharton.sdkmanager:gradle-plugin:0.12.+'
+        classpath 'com.github.dcendents:android-maven-plugin:1.2'
+    }
+}
+apply plugin: 'android-sdk-manager'
+apply plugin: 'com.android.library'
+apply plugin: 'com.github.dcendents.android-maven'
+apply plugin: 'signing'
+
+def properties = new Properties()
+properties.load(new FileInputStream(file('../version.properties')))
+
+description = 'gRPC: Android'
+group = "io.grpc"
+version = "${properties.version}"
+
+repositories {
+    mavenCentral()
+    mavenLocal()
+}
+
+// Need to override to ensure maven artifact is generated with correct name
+// Must match uploadTask.repositories.mavenDeployer.pom.artifactId
+project.archivesBaseName = "grpc-android"
+
+android {
+    // Matches preinstalled on travis to keep CI build times down
+    compileSdkVersion 21
+    buildToolsVersion '21.1.1'
+
+    defaultConfig {
+        minSdkVersion 9
+        targetSdkVersion 21
+        versionCode 1
+        versionName "1.0"
+    }
+    lintOptions {
+        disable 'InvalidPackage', 'HardcodedText'
+    }
+}
+
+// Disable JavaDoc doclint on Java 8. It's annoying.
+if (JavaVersion.current().isJava8Compatible()) {
+    allprojects {
+        tasks.withType(Javadoc) {
+            options.addStringOption('Xdoclint:none', '-quiet')
+        }
+    }
+}
+
+configurations {
+    javadocDeps
+}
+
+dependencies {
+    compile "io.grpc:grpc-okhttp:${properties.version}"
+    javadocDeps "io.grpc:grpc-okhttp:${properties.version}"
+
+    testCompile 'junit:junit:4.12'
+    testCompile 'org.mockito:mockito-core:1.9.5'
+}
+
+signing {
+    required false
+    sign configurations.archives
+}
+
+uploadArchives.repositories.mavenDeployer {
+    beforeDeployment { MavenDeployment deployment -> signing.signPom(deployment) }
+    String stagingUrl
+    if (rootProject.hasProperty('repositoryId')) {
+        stagingUrl = 'https://oss.sonatype.org/service/local/staging/deployByRepositoryId/' +
+                rootProject.repositoryId
+    } else {
+        stagingUrl = 'https://oss.sonatype.org/service/local/staging/deploy/maven2/'
+    }
+    def configureAuth = {
+        if (rootProject.hasProperty('ossrhUsername') && rootProject.hasProperty('ossrhPassword')) {
+            authentication(userName: rootProject.ossrhUsername, password: rootProject.ossrhPassword)
+        }
+    }
+    repository(url: stagingUrl, configureAuth)
+    snapshotRepository(url: 'https://oss.sonatype.org/content/repositories/snapshots/', configureAuth)
+    pom.artifactId = 'grpc-android'
+}
+
+[
+        install.repositories.mavenInstaller,
+        uploadArchives.repositories.mavenDeployer,
+]*.pom*.whenConfigured { pom ->
+    pom.project {
+        name "$project.group:grpc-android"
+        description project.description
+        packaging 'aar'
+        url 'https://github.com/grpc/grpc-java'
+
+        scm {
+            connection 'scm:svn:https://github.com/grpc/grpc-java.git'
+            developerConnection 'scm:svn:git@github.com:grpc/grpc-java.git'
+            url 'https://github.com/grpc/grpc-java'
+        }
+
+        licenses {
+            license {
+                name 'BSD 3-Clause'
+                url 'http://opensource.org/licenses/BSD-3-Clause'
+            }
+        }
+
+        developers {
+            developer {
+                id "grpc.io"
+                name "gRPC Contributors"
+                email "grpc-io@googlegroups.com"
+                url "http://grpc.io/"
+                // https://issues.gradle.org/browse/GRADLE-2719
+                organization = "Google, Inc."
+                organizationUrl "https://www.google.com"
+            }
+        }
+    }
+}
+
+task sourcesJar(type: Jar) {
+    from android.sourceSets.main.java.srcDirs
+    classifier = 'sources'
+}
+
+task javadoc(type: Javadoc) {
+    source = android.sourceSets.main.java.srcDirs
+    classpath += project.files(android.getBootClasspath().join(File.pathSeparator))
+    classpath += configurations.javadocDeps
+    destinationDir = file("../javadoc/")
+}
+
+task javadocJar(type: Jar, dependsOn: javadoc) {
+    classifier = 'javadoc'
+    from javadoc.destinationDir
+}
+
+artifacts {
+    archives javadocJar
+    archives sourcesJar
+}

android/src/androidTest/java/io/grpc/android/AndroidChannelBuilderTest.java

@@ -0,0 +1,56 @@
+/*
+ * Copyright 2014, Google Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *    * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *    * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *
+ *    * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package io.grpc.android;
+
+import static org.junit.Assert.assertNotNull;
+
+import io.grpc.ManagedChannel;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.JUnit4;
+
+/**
+ * Tests for {@link io.grpc.android.AndroidChannelBuilder}.
+ */
+@RunWith(JUnit4.class)
+public class AndroidChannelBuilderTest {
+
+  @Test
+  public void testDefaultProducesChannel() {
+    AndroidChannelBuilder channelBuilder = AndroidChannelBuilder.forAddress("localhost", 1234);
+    channelBuilder.userAgent("test");
+    ManagedChannel channel = channelBuilder.build();
+    assertNotNull(channel);
+    channel.shutdownNow();
+  }
+}

android/src/main/AndroidManifest.xml

@@ -0,0 +1,34 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+ Copyright 2014, Google Inc. All rights reserved.
+
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions are
+ met:
+
+    * Redistributions of source code must retain the above copyright
+ notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above
+ copyright notice, this list of conditions and the following disclaimer
+ in the documentation and/or other materials provided with the
+ distribution.
+    * Neither the name of Google Inc. nor the names of its
+ contributors may be used to endorse or promote products derived from
+ this software without specific prior written permission.
+
+ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+-->
+
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+          package="io.grpc.android">
+</manifest>

android/src/main/java/io/grpc/android/AndroidChannelBuilder.java

@@ -0,0 +1,139 @@
+/*
+ * Copyright 2014, Google Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *    * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *    * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *
+ *    * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package io.grpc.android;
+
+import io.grpc.ClientInterceptor;
+import io.grpc.ExperimentalApi;
+import io.grpc.ManagedChannelBuilder;
+import io.grpc.internal.ManagedChannelImpl;
+import io.grpc.okhttp.NegotiationType;
+import io.grpc.okhttp.OkHttpChannelBuilder;
+
+import java.util.List;
+import java.util.concurrent.ExecutorService;
+
+/**
+ * A {@link io.grpc.ManagedChannelBuilder} that provides a stable interface for producing
+ * {@link io.grpc.Channel} instances on Android. This allows applications to be resilient
+ * to changes such as defaulting to a new channel implementation or breaking API changes
+ * in existing ones. Configuration options will be added here only if they provide value
+ * to a broad set of users and are likely to be resilient to changes in the underlying channel
+ * implementation.
+ *
+ * <p>Developers needing advanced configuration are free to use the underlying channel
+ * implementations directly while assuming the risks associated with using an
+ * {@link io.grpc.ExperimentalApi}.
+ */
+
+// TODO(lryan):
+// - Document the various dangers of scheduling work onto Android Main/UI/whatever
+// threads. Is any enforcement practical? Conversely is there a sensible default. I assume
+// its also a bad idea to use huge numbers of threads too.
+// - Provide SSL installation and detect ALPN/NPN support?
+// - Allow for an alternate TrustManager ? for self-signed, pinning etc. Is there a good default
+//   impl for these variations blessed by security team?
+// - Augment with user-agent with app id?
+// - Specify a smaller flow-control window by default? Fewer concurrent streams?
+public class AndroidChannelBuilder extends ManagedChannelBuilder<AndroidChannelBuilder> {
+  // Currently we only support OkHttp on Android. This will become dynamic as more transport
+  // implementations become available.
+  private final OkHttpChannelBuilder baseBuilder;
+
+  public static AndroidChannelBuilder forAddress(String host, int port) {
+    return new AndroidChannelBuilder(OkHttpChannelBuilder.forAddress(host, port));
+  }
+
+  private AndroidChannelBuilder(OkHttpChannelBuilder builder) {
+    this.baseBuilder = builder;
+  }
+
+  @Override
+  public AndroidChannelBuilder executor(ExecutorService executor) {
+    baseBuilder.executor(executor);
+    return this;
+  }
+
+  @Override
+  public AndroidChannelBuilder intercept(List<ClientInterceptor> list) {
+    baseBuilder.intercept(list);
+    return this;
+  }
+
+  @Override
+  public AndroidChannelBuilder intercept(ClientInterceptor... interceptors) {
+    baseBuilder.intercept(interceptors);
+    return this;
+  }
+
+  @Override
+  public AndroidChannelBuilder userAgent(String userAgent) {
+    baseBuilder.userAgent(userAgent);
+    return this;
+  }
+
+  /**
+   * Use of a plaintext connection to the server. By default a secure connection mechanism
+   * such as TLS will be used.
+   *
+   * <p>Should only be used for testing or for APIs where the use of such API or the data
+   * exchanged is not sensitive.
+   *
+   * @param skipNegotiation @{code true} if there is a priori knowledge that the endpoint supports
+   *                        plaintext, {@code false} if plaintext use must be negotiated.
+   */
+  @ExperimentalApi("primarily for testing")
+  public AndroidChannelBuilder usePlaintext(boolean skipNegotiation) {
+    if (skipNegotiation) {
+      baseBuilder.negotiationType(NegotiationType.PLAINTEXT);
+      return this;
+    } else {
+      throw new IllegalArgumentException("Not currently supported");
+    }
+  }
+
+  /**
+   * Overrides the host used with TLS and HTTP virtual hosting. It does not change what host is
+   * actually connected to.
+   *
+   * <p>Should only be used for testing.
+   */
+  @ExperimentalApi("primarily for testing")
+  public AndroidChannelBuilder overrideHostForAuthority(String host) {
+    baseBuilder.overrideHostForAuthority(host);
+    return this;
+  }
+
+  @Override
+  public ManagedChannelImpl build() {
+    return baseBuilder.build();
+  }
+}

build.gradle

@@ -8,7 +8,7 @@ buildscript {
   }
 }
 
-subprojects {
+configure(subprojects - project(":grpc-android")) {
     apply plugin: "checkstyle"
     apply plugin: "java"
     apply plugin: "maven"
@@ -17,8 +17,11 @@ subprojects {
     apply plugin: "signing"
     apply plugin: "jacoco"
 
+    def properties = new Properties()
+    properties.load(new FileInputStream("version.properties"))
+
     group = "io.grpc"
-    version = "0.9.0-SNAPSHOT"
+    version = properties.version
 
     sourceCompatibility = 1.6
     targetCompatibility = 1.6

settings.gradle

@@ -11,6 +11,7 @@ include ":grpc-interop-testing"
 include ":grpc-all"
 include ":grpc-benchmarks"
 include ":grpc-examples"
+include ":grpc-android"
 
 project(':grpc-core').projectDir = "$rootDir/core" as File
 project(':grpc-stub').projectDir = "$rootDir/stub" as File
@@ -24,6 +25,7 @@ project(':grpc-interop-testing').projectDir = "$rootDir/interop-testing" as File
 project(':grpc-all').projectDir = "$rootDir/all" as File
 project(':grpc-benchmarks').projectDir = "$rootDir/benchmarks" as File
 project(':grpc-examples').projectDir = "$rootDir/examples" as File
+project(':grpc-android').projectDir = "$rootDir/android" as File
 
 if (settings.hasProperty('skipCodegen') && skipCodegen.toBoolean()) {
   println '*** Skipping the build of codegen and compilation of proto files because skipCodegen=true'

version.properties

@@ -0,0 +1 @@
+version = 0.9.0-SNAPSHOT