Examples share a common gradle build script (#1123)

* Examples in a single separate project. Bump version to 0.4.0-SNAPSHOT

* Formatting

* Gradle 6.3. Remove local wrappers

examples/build.gradle

@@ -0,0 +1,43 @@
+plugins {
+    id 'com.github.sherter.google-java-format'  apply false
+    id "com.jfrog.artifactory" apply false
+}
+
+subprojects {
+    apply plugin: 'eclipse'
+    apply plugin: 'java'
+    apply plugin: 'java-library'
+    apply plugin: 'idea'
+    apply plugin: 'com.github.sherter.google-java-format'
+
+    group = "io.opentelemetry"
+    version = "0.1.0-SNAPSHOT"
+
+    ext {
+        opentelemetryVersion = "0.4.0-SNAPSHOT"
+        grpcVersion = '1.24.0' // CURRENT_GRPC_VERSION
+        protobufVersion = '3.10.0'
+        protocVersion = protobufVersion
+    }
+
+    repositories {
+        mavenCentral()
+        jcenter()
+        maven {
+            // Add snapshot repository
+            url "https://oss.jfrog.org/artifactory/oss-snapshot-local"
+        }
+    }
+
+    googleJavaFormat {
+        toolVersion = '1.7'
+    }
+    compileJava.dependsOn(verifyGoogleJavaFormat)
+
+    //create a single Jar with all dependencies
+    task fatJar(type: Jar) {
+        baseName = project.name + '-all'
+        from { configurations.compile.collect { it.isDirectory() ? it : zipTree(it) } }
+        with jar
+    }
+}

examples/gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.3-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.3-all.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists

examples/gradlew.bat

@@ -29,9 +29,6 @@ if "%DIRNAME%" == "" set DIRNAME=.
 set APP_BASE_NAME=%~n0
 set APP_HOME=%DIRNAME%
 
-@rem Resolve any "." and ".." in APP_HOME to make it shorter.
-for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
-
 @rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
 set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
 

examples/grpc/README.md

@@ -14,21 +14,21 @@ and create a **Child Span**.
 * Java 1.8
 
 ## 1 - Compile 
-```bash
+```shell script
-gradlew fatJar
+../gradlew fatJar
 ```
 
 ## 2 - Start the Server
-```bash
+```shell script
-java -cp ./build/libs/opentelemetry-example-grpc-all-0.1.0-SNAPSHOT.jar io.opentelemetry.example.HelloWorldServer
+java -cp ./build/libs/opentelemetry-examples-grpc-all-0.1.0-SNAPSHOT.jar io.opentelemetry.example.HelloWorldServer
 ```
  
 ## 3 - Start the normal Client
-```bash
+```shell script
-java -cp ./build/libs/opentelemetry-example-grpc-all-0.1.0-SNAPSHOT.jar io.opentelemetry.example.HelloWorldClient
+java -cp ./build/libs/opentelemetry-examples-grpc-all-0.1.0-SNAPSHOT.jar io.opentelemetry.example.HelloWorldClient
 ```
 
 ## 4 - Start the streamed Client
-```bash
+```shell script
-java -cp ./build/libs/opentelemetry-example-grpc-all-0.1.0-SNAPSHOT.jar io.opentelemetry.example.HelloWorldClientStream
+java -cp ./build/libs/opentelemetry-examples-grpc-all-0.1.0-SNAPSHOT.jar io.opentelemetry.example.HelloWorldClientStream
 ```

examples/grpc/build.gradle

@@ -1,36 +1,19 @@
 plugins {
-    // ASSUMES GRADLE 2.12 OR HIGHER. Use plugin version 0.7.5 with earlier gradle versions
+    id "com.google.protobuf"
-    id 'com.google.protobuf' version '0.8.8'
-    // Generate IntelliJ IDEA's .idea & .iml project files
-    id 'java'
 }
 
-apply plugin: 'com.google.protobuf'
+description = 'OpenTelemetry Examples for gRPC'
-
+ext.moduleName = "io.opentelemetry.examples.grpc"
-group 'io.opentelemetry'
-version '0.1.0-SNAPSHOT'
-
-def opentelemetryVersion = '0.3.0'
 
 
-def grpcVersion = '1.24.0' // CURRENT_GRPC_VERSION
-def protobufVersion = '3.10.0'
-def protocVersion = protobufVersion
-
-repositories {
-    mavenCentral()
-}
 
 dependencies {
     compile "io.opentelemetry:opentelemetry-api:${opentelemetryVersion}"
     compile "io.opentelemetry:opentelemetry-sdk:${opentelemetryVersion}"
     compile "io.opentelemetry:opentelemetry-exporters-logging:${opentelemetryVersion}"
-
     compile "io.grpc:grpc-protobuf:${grpcVersion}"
     compile "io.grpc:grpc-stub:${grpcVersion}"
     compile "io.grpc:grpc-netty-shaded:${grpcVersion}"
-
-    testCompile group: 'junit', name: 'junit', version: '4.12'
 }
 
 protobuf {
@@ -52,11 +35,3 @@ sourceSets {
         }
     }
 }
-
-//create a single Jar with all dependencies
-task fatJar(type: Jar) {
-    baseName = project.name + '-all'
-    from { configurations.compile.collect { it.isDirectory() ? it : zipTree(it) } }
-    with jar
-}
-

examples/grpc/gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +0,0 @@
-distributionBase=GRADLE_USER_HOME
-distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.3-bin.zip
-zipStoreBase=GRADLE_USER_HOME
-zipStorePath=wrapper/dists

examples/grpc/gradlew.bat

@@ -1,103 +0,0 @@
-@rem
-@rem Copyright 2015 the original author or authors.
-@rem
-@rem Licensed under the Apache License, Version 2.0 (the "License");
-@rem you may not use this file except in compliance with the License.
-@rem You may obtain a copy of the License at
-@rem
-@rem      https://www.apache.org/licenses/LICENSE-2.0
-@rem
-@rem Unless required by applicable law or agreed to in writing, software
-@rem distributed under the License is distributed on an "AS IS" BASIS,
-@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-@rem See the License for the specific language governing permissions and
-@rem limitations under the License.
-@rem
-
-@if "%DEBUG%" == "" @echo off
-@rem ##########################################################################
-@rem
-@rem  Gradle startup script for Windows
-@rem
-@rem ##########################################################################
-
-@rem Set local scope for the variables with windows NT shell
-if "%OS%"=="Windows_NT" setlocal
-
-set DIRNAME=%~dp0
-if "%DIRNAME%" == "" set DIRNAME=.
-set APP_BASE_NAME=%~n0
-set APP_HOME=%DIRNAME%
-
-@rem Resolve any "." and ".." in APP_HOME to make it shorter.
-for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
-
-@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
-
-@rem Find java.exe
-if defined JAVA_HOME goto findJavaFromJavaHome
-
-set JAVA_EXE=java.exe
-%JAVA_EXE% -version >NUL 2>&1
-if "%ERRORLEVEL%" == "0" goto init
-
-echo.
-echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
-echo.
-echo Please set the JAVA_HOME variable in your environment to match the
-echo location of your Java installation.
-
-goto fail
-
-:findJavaFromJavaHome
-set JAVA_HOME=%JAVA_HOME:"=%
-set JAVA_EXE=%JAVA_HOME%/bin/java.exe
-
-if exist "%JAVA_EXE%" goto init
-
-echo.
-echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
-echo.
-echo Please set the JAVA_HOME variable in your environment to match the
-echo location of your Java installation.
-
-goto fail
-
-:init
-@rem Get command-line arguments, handling Windows variants
-
-if not "%OS%" == "Windows_NT" goto win9xME_args
-
-:win9xME_args
-@rem Slurp the command line arguments.
-set CMD_LINE_ARGS=
-set _SKIP=2
-
-:win9xME_args_slurp
-if "x%~1" == "x" goto execute
-
-set CMD_LINE_ARGS=%*
-
-:execute
-@rem Setup the command line
-
-set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
-
-@rem Execute Gradle
-"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
-
-:end
-@rem End local scope for the variables with windows NT shell
-if "%ERRORLEVEL%"=="0" goto mainEnd
-
-:fail
-rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
-rem the _cmd.exe /c_ return code!
-if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
-exit /b 1
-
-:mainEnd
-if "%OS%"=="Windows_NT" endlocal
-
-:omega

examples/grpc/settings.gradle

@@ -1,2 +0,0 @@
-rootProject.name = 'opentelemetry-example-grpc'
-

examples/grpc/src/main/java/io/opentelemetry/example/HelloWorldClient.java

@@ -38,7 +38,6 @@ import io.opentelemetry.sdk.trace.export.SimpleSpansProcessor;
 import io.opentelemetry.trace.Span;
 import io.opentelemetry.trace.Status;
 import io.opentelemetry.trace.Tracer;
-
 import java.util.concurrent.TimeUnit;
 import java.util.logging.Level;
 import java.util.logging.Logger;

examples/grpc/src/main/java/io/opentelemetry/example/HelloWorldClientStream.java

@@ -39,7 +39,6 @@ import io.opentelemetry.sdk.trace.export.SimpleSpansProcessor;
 import io.opentelemetry.trace.Span;
 import io.opentelemetry.trace.Status;
 import io.opentelemetry.trace.Tracer;
-
 import java.util.Arrays;
 import java.util.List;
 import java.util.concurrent.TimeUnit;
@@ -61,12 +60,13 @@ public class HelloWorldClientStream {
   // Share context via text headers
   HttpTextFormat textFormat = OpenTelemetry.getPropagators().getHttpTextFormat();
   // Inject context into the gRPC request metadata
-  HttpTextFormat.Setter<Metadata> setter = new HttpTextFormat.Setter<Metadata>() {
+  HttpTextFormat.Setter<Metadata> setter =
-    @Override
+      new HttpTextFormat.Setter<Metadata>() {
-    public void set(Metadata carrier, String key, String value) {
+        @Override
-      carrier.put(Metadata.Key.of(key, Metadata.ASCII_STRING_MARSHALLER), value);
+        public void set(Metadata carrier, String key, String value) {
-    }
+          carrier.put(Metadata.Key.of(key, Metadata.ASCII_STRING_MARSHALLER), value);
-  };
+        }
+      };
 
   /** Construct client connecting to HelloWorld server at {@code host:port}. */
   public HelloWorldClientStream(String host, int port) {
@@ -102,7 +102,7 @@ public class HelloWorldClientStream {
 
     // Start a span
     Span span =
-            tracer.spanBuilder("helloworld.Greeter/SayHello").setSpanKind(Span.Kind.CLIENT).startSpan();
+        tracer.spanBuilder("helloworld.Greeter/SayHello").setSpanKind(Span.Kind.CLIENT).startSpan();
     span.setAttribute("component", "grpc");
     span.setAttribute("rpc.service", "Greeter");
     span.setAttribute("net.peer.ip", this.serverHostname);
@@ -114,7 +114,7 @@ public class HelloWorldClientStream {
     try (Scope scope = tracer.withSpan(span)) {
       HelloReplyStreamObserver replyObserver = new HelloReplyStreamObserver();
       requestObserver = asyncStub.sayHelloStream(replyObserver);
-      for(String name : names){
+      for (String name : names) {
         try {
           requestObserver.onNext(HelloRequest.newBuilder().setName(name).build());
           // Sleep for a bit before sending the next one.
@@ -127,7 +127,7 @@ public class HelloWorldClientStream {
       requestObserver.onCompleted();
       span.addEvent("Done sending");
       span.setStatus(Status.OK);
-    } catch (StatusRuntimeException e){
+    } catch (StatusRuntimeException e) {
       logger.log(Level.WARNING, "RPC failed: {0}", e.getStatus());
       // TODO create mapping for io.grpc.Status<->io.opentelemetry.trace.Status
       span.setStatus(Status.UNKNOWN.withDescription("gRPC status: " + e.getStatus()));
@@ -160,8 +160,8 @@ public class HelloWorldClientStream {
 
     @Override
     public void onCompleted() {
-      //Since onCompleted is async and the span.end() is called in the main thread,
+      // Since onCompleted is async and the span.end() is called in the main thread,
-      //it is recommended to set the span Status in the main thread.
+      // it is recommended to set the span Status in the main thread.
     }
   }
 

examples/grpc/src/main/java/io/opentelemetry/example/HelloWorldServer.java

@@ -37,7 +37,6 @@ import io.opentelemetry.sdk.trace.export.SimpleSpansProcessor;
 import io.opentelemetry.trace.Span;
 import io.opentelemetry.trace.Status;
 import io.opentelemetry.trace.Tracer;
-
 import java.io.IOException;
 import java.net.InetSocketAddress;
 import java.util.logging.Logger;
@@ -49,7 +48,8 @@ public class HelloWorldServer {
   private final int port = 50051;
 
   // OTel API
-  Tracer tracer = OpenTelemetry.getTracerProvider().get("io.opentelemetry.example.HelloWorldServer");
+  Tracer tracer =
+      OpenTelemetry.getTracerProvider().get("io.opentelemetry.example.HelloWorldServer");
   // Export traces as log
   LoggingSpanExporter exporter = new LoggingSpanExporter();
   // Share context via text
@@ -133,13 +133,13 @@ public class HelloWorldServer {
 
     // We serve a stream gRPC call
     @Override
-    public StreamObserver<HelloRequest> sayHelloStream(final StreamObserver<HelloReply> responseObserver) {
+    public StreamObserver<HelloRequest> sayHelloStream(
+        final StreamObserver<HelloReply> responseObserver) {
       return new StreamObserver<HelloRequest>() {
         @Override
         public void onNext(HelloRequest value) {
           responseObserver.onNext(
-                  HelloReply.newBuilder().setMessage("Hello " + value.getName()).build()
+              HelloReply.newBuilder().setMessage("Hello " + value.getName()).build());
-          );
         }
 
         @Override
@@ -161,16 +161,16 @@ public class HelloWorldServer {
     public <ReqT, RespT> ServerCall.Listener<ReqT> interceptCall(
         ServerCall<ReqT, RespT> call, Metadata headers, ServerCallHandler<ReqT, RespT> next) {
       // Extract the Span Context from the metadata of the gRPC request
-      Context extractedContext = textFormat.extract(Context.current(),headers, getter);
+      Context extractedContext = textFormat.extract(Context.current(), headers, getter);
       InetSocketAddress clientInfo =
           (InetSocketAddress) call.getAttributes().get(Grpc.TRANSPORT_ATTR_REMOTE_ADDR);
       // Build a span based on the received context
       try (Scope scope = ContextUtils.withScopedContext(extractedContext)) {
         Span span =
-                tracer
+            tracer
-                        .spanBuilder("helloworld.Greeter/SayHello")
+                .spanBuilder("helloworld.Greeter/SayHello")
-                        .setSpanKind(Span.Kind.SERVER)
+                .setSpanKind(Span.Kind.SERVER)
-                        .startSpan();
+                .startSpan();
         span.setAttribute("component", "grpc");
         span.setAttribute("rpc.service", "Greeter");
         span.setAttribute("net.peer.ip", clientInfo.getHostString());

examples/http/README.md

@@ -15,16 +15,16 @@ and create a **Child Span** with attached a **Span Event**.
 * Be on the project root folder
 
 ## 1 - Compile 
-```bash
+```shell script
-gradlew fatJar
+../gradlew fatJar
 ```
 
 ## 2 - Start the Server
-```bash
+```shell script
-java -cp ./build/libs/opentelemetry-example-http-all-0.2.0.jar io.opentelemetry.example.http.HttpServer
+java -cp ./build/libs/opentelemetry-examples-http-all-0.1.0-SNAPSHOT.jar io.opentelemetry.example.http.HttpServer
 ```
  
 ## 3 - Start the Client
-```bash
+```shell script
-java -cp ./build/libs/opentelemetry-example-http-all-0.2.0.jar io.opentelemetry.example.http.HttpClient
+java -cp ./build/libs/opentelemetry-examples-http-all-0.1.0-SNAPSHOT.jar io.opentelemetry.example.http.HttpClient
 ```

examples/http/build.gradle

@@ -2,27 +2,11 @@ plugins {
     id 'java'
 }
 
-group 'io.opentelemetry'
+description = 'OpenTelemetry Examples for HTTP'
-version '0.1.0-SNAPSHOT'
+ext.moduleName = "io.opentelemetry.examples.http"
-
-def opentelemetryVersion = '0.3.0'
-
-//create a single Jar with all dependencies
-task fatJar(type: Jar) {
-    baseName = project.name + '-all'
-    from { configurations.compile.collect { it.isDirectory() ? it : zipTree(it) } }
-    with jar
-}
-
-repositories {
-    mavenCentral()
-}
 
 dependencies {
     compile("io.opentelemetry:opentelemetry-api:${opentelemetryVersion}")
     compile("io.opentelemetry:opentelemetry-sdk:${opentelemetryVersion}")
     compile("io.opentelemetry:opentelemetry-exporters-logging:${opentelemetryVersion}")
-    compile("io.grpc:grpc-protobuf:1.28.0")
-    compile("io.grpc:grpc-netty-shaded:1.28.0")
-    testCompile group: 'junit', name: 'junit', version: '4.12'
 }

examples/http/gradlew

@@ -1,183 +0,0 @@
-#!/usr/bin/env sh
-
-#
-# Copyright 2015 the original author or authors.
-#
-# 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
-#
-#      https://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.
-#
-
-##############################################################################
-##
-##  Gradle start up script for UN*X
-##
-##############################################################################
-
-# Attempt to set APP_HOME
-# Resolve links: $0 may be a link
-PRG="$0"
-# Need this for relative symlinks.
-while [ -h "$PRG" ] ; do
-    ls=`ls -ld "$PRG"`
-    link=`expr "$ls" : '.*-> \(.*\)$'`
-    if expr "$link" : '/.*' > /dev/null; then
-        PRG="$link"
-    else
-        PRG=`dirname "$PRG"`"/$link"
-    fi
-done
-SAVED="`pwd`"
-cd "`dirname \"$PRG\"`/" >/dev/null
-APP_HOME="`pwd -P`"
-cd "$SAVED" >/dev/null
-
-APP_NAME="Gradle"
-APP_BASE_NAME=`basename "$0"`
-
-# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
-
-# Use the maximum available, or set MAX_FD != -1 to use that value.
-MAX_FD="maximum"
-
-warn () {
-    echo "$*"
-}
-
-die () {
-    echo
-    echo "$*"
-    echo
-    exit 1
-}
-
-# OS specific support (must be 'true' or 'false').
-cygwin=false
-msys=false
-darwin=false
-nonstop=false
-case "`uname`" in
-  CYGWIN* )
-    cygwin=true
-    ;;
-  Darwin* )
-    darwin=true
-    ;;
-  MINGW* )
-    msys=true
-    ;;
-  NONSTOP* )
-    nonstop=true
-    ;;
-esac
-
-CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
-
-# Determine the Java command to use to start the JVM.
-if [ -n "$JAVA_HOME" ] ; then
-    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
-        # IBM's JDK on AIX uses strange locations for the executables
-        JAVACMD="$JAVA_HOME/jre/sh/java"
-    else
-        JAVACMD="$JAVA_HOME/bin/java"
-    fi
-    if [ ! -x "$JAVACMD" ] ; then
-        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
-
-Please set the JAVA_HOME variable in your environment to match the
-location of your Java installation."
-    fi
-else
-    JAVACMD="java"
-    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
-
-Please set the JAVA_HOME variable in your environment to match the
-location of your Java installation."
-fi
-
-# Increase the maximum file descriptors if we can.
-if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
-    MAX_FD_LIMIT=`ulimit -H -n`
-    if [ $? -eq 0 ] ; then
-        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
-            MAX_FD="$MAX_FD_LIMIT"
-        fi
-        ulimit -n $MAX_FD
-        if [ $? -ne 0 ] ; then
-            warn "Could not set maximum file descriptor limit: $MAX_FD"
-        fi
-    else
-        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
-    fi
-fi
-
-# For Darwin, add options to specify how the application appears in the dock
-if $darwin; then
-    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
-fi
-
-# For Cygwin or MSYS, switch paths to Windows format before running java
-if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then
-    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
-    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
-    JAVACMD=`cygpath --unix "$JAVACMD"`
-
-    # We build the pattern for arguments to be converted via cygpath
-    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
-    SEP=""
-    for dir in $ROOTDIRSRAW ; do
-        ROOTDIRS="$ROOTDIRS$SEP$dir"
-        SEP="|"
-    done
-    OURCYGPATTERN="(^($ROOTDIRS))"
-    # Add a user-defined pattern to the cygpath arguments
-    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
-        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
-    fi
-    # Now convert the arguments - kludge to limit ourselves to /bin/sh
-    i=0
-    for arg in "$@" ; do
-        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
-        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
-
-        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
-            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
-        else
-            eval `echo args$i`="\"$arg\""
-        fi
-        i=`expr $i + 1`
-    done
-    case $i in
-        0) set -- ;;
-        1) set -- "$args0" ;;
-        2) set -- "$args0" "$args1" ;;
-        3) set -- "$args0" "$args1" "$args2" ;;
-        4) set -- "$args0" "$args1" "$args2" "$args3" ;;
-        5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
-        6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
-        7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
-        8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
-        9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
-    esac
-fi
-
-# Escape application args
-save () {
-    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
-    echo " "
-}
-APP_ARGS=`save "$@"`
-
-# Collect all arguments for the java command, following the shell quoting and substitution rules
-eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
-
-exec "$JAVACMD" "$@"

examples/http/gradlew.bat

@@ -1,103 +0,0 @@
-@rem
-@rem Copyright 2015 the original author or authors.
-@rem
-@rem Licensed under the Apache License, Version 2.0 (the "License");
-@rem you may not use this file except in compliance with the License.
-@rem You may obtain a copy of the License at
-@rem
-@rem      https://www.apache.org/licenses/LICENSE-2.0
-@rem
-@rem Unless required by applicable law or agreed to in writing, software
-@rem distributed under the License is distributed on an "AS IS" BASIS,
-@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-@rem See the License for the specific language governing permissions and
-@rem limitations under the License.
-@rem
-
-@if "%DEBUG%" == "" @echo off
-@rem ##########################################################################
-@rem
-@rem  Gradle startup script for Windows
-@rem
-@rem ##########################################################################
-
-@rem Set local scope for the variables with windows NT shell
-if "%OS%"=="Windows_NT" setlocal
-
-set DIRNAME=%~dp0
-if "%DIRNAME%" == "" set DIRNAME=.
-set APP_BASE_NAME=%~n0
-set APP_HOME=%DIRNAME%
-
-@rem Resolve any "." and ".." in APP_HOME to make it shorter.
-for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
-
-@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
-
-@rem Find java.exe
-if defined JAVA_HOME goto findJavaFromJavaHome
-
-set JAVA_EXE=java.exe
-%JAVA_EXE% -version >NUL 2>&1
-if "%ERRORLEVEL%" == "0" goto init
-
-echo.
-echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
-echo.
-echo Please set the JAVA_HOME variable in your environment to match the
-echo location of your Java installation.
-
-goto fail
-
-:findJavaFromJavaHome
-set JAVA_HOME=%JAVA_HOME:"=%
-set JAVA_EXE=%JAVA_HOME%/bin/java.exe
-
-if exist "%JAVA_EXE%" goto init
-
-echo.
-echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
-echo.
-echo Please set the JAVA_HOME variable in your environment to match the
-echo location of your Java installation.
-
-goto fail
-
-:init
-@rem Get command-line arguments, handling Windows variants
-
-if not "%OS%" == "Windows_NT" goto win9xME_args
-
-:win9xME_args
-@rem Slurp the command line arguments.
-set CMD_LINE_ARGS=
-set _SKIP=2
-
-:win9xME_args_slurp
-if "x%~1" == "x" goto execute
-
-set CMD_LINE_ARGS=%*
-
-:execute
-@rem Setup the command line
-
-set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
-
-@rem Execute Gradle
-"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
-
-:end
-@rem End local scope for the variables with windows NT shell
-if "%ERRORLEVEL%"=="0" goto mainEnd
-
-:fail
-rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
-rem the _cmd.exe /c_ return code!
-if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
-exit /b 1
-
-:mainEnd
-if "%OS%"=="Windows_NT" endlocal
-
-:omega

examples/http/settings.gradle

@@ -1,2 +0,0 @@
-rootProject.name = 'opentelemetry-example-http'
-

examples/http/src/main/java/io/opentelemetry/example/http/HttpClient.java

@@ -27,7 +27,6 @@ import io.opentelemetry.sdk.trace.export.SimpleSpansProcessor;
 import io.opentelemetry.trace.Span;
 import io.opentelemetry.trace.Status;
 import io.opentelemetry.trace.Tracer;
-
 import java.io.BufferedReader;
 import java.io.InputStreamReader;
 import java.net.HttpURLConnection;
@@ -94,7 +93,8 @@ public class HttpClient {
         con.setRequestMethod("GET");
         status = con.getResponseCode();
         BufferedReader in =
-            new BufferedReader(new InputStreamReader(con.getInputStream(), Charset.defaultCharset()));
+            new BufferedReader(
+                new InputStreamReader(con.getInputStream(), Charset.defaultCharset()));
         String inputLine;
         while ((inputLine = in.readLine()) != null) {
           content.append(inputLine);

examples/http/src/main/java/io/opentelemetry/example/http/HttpServer.java

@@ -16,9 +16,9 @@
 
 package io.opentelemetry.example.http;
 
-import io.grpc.Context;
 import com.sun.net.httpserver.HttpExchange;
 import com.sun.net.httpserver.HttpHandler;
+import io.grpc.Context;
 import io.opentelemetry.OpenTelemetry;
 import io.opentelemetry.common.AttributeValue;
 import io.opentelemetry.context.ContextUtils;
@@ -29,7 +29,6 @@ import io.opentelemetry.sdk.OpenTelemetrySdk;
 import io.opentelemetry.sdk.trace.TracerSdkProvider;
 import io.opentelemetry.sdk.trace.export.SimpleSpansProcessor;
 import io.opentelemetry.trace.*;
-
 import java.io.IOException;
 import java.io.OutputStream;
 import java.net.InetSocketAddress;
@@ -49,7 +48,8 @@ public class HttpServer {
       Span span = null;
 
       // Extract the context from the HTTP request
-      Context ctx = OpenTelemetry.getPropagators().getHttpTextFormat().extract(Context.current(), he, getter);
+      Context ctx =
+          OpenTelemetry.getPropagators().getHttpTextFormat().extract(Context.current(), he, getter);
       try (Scope scope = ContextUtils.withScopedContext(ctx)) {
         // Build a span automatically using the received context
         span = spanBuilder.startSpan();

examples/jaeger/README.md

@@ -12,12 +12,12 @@ to instrument a simple application using Jaeger as trace exporter.
 
 
 ## 1 - Compile 
-```bash
+```shell script
-gradlew fatJar
+../gradlew fatJar
 ```
 ## 2 - Run Jaeger
 
-```bash
+```shell script
 docker run --rm -it --name jaeger\
   -p 16686:16686 \
   -p 14250:14250 \
@@ -26,8 +26,8 @@ docker run --rm -it --name jaeger\
 
 
 ## 3 - Start the Application
-```bash
+```shell script
-java -cp build/libs/opentelemetry-example-jaeger-all-0.2.0.jar io.opentelemetry.example.JaegerExample localhost 14250
+java -cp build/libs/opentelemetry-examples-jaeger-all-0.1.0-SNAPSHOT.jar io.opentelemetry.example.JaegerExample localhost 14250
 ```
 ## 4 - Open the Jaeger UI
 

examples/jaeger/build.gradle

@@ -2,21 +2,8 @@ plugins {
     id 'java'
 }
 
-group 'io.opentelemetry'
+description = 'OpenTelemetry Examples for Jaeger Exporter'
-version '0.1.0-SNAPSHOT'
+ext.moduleName = "io.opentelemetry.examples.jaeger"
-
-def opentelemetryVersion = '0.3.0'
-
-//create a single Jar with all dependencies
-task fatJar(type: Jar) {
-    baseName = project.name + '-all'
-    from { configurations.compile.collect { it.isDirectory() ? it : zipTree(it) } }
-    with jar
-}
-
-repositories {
-    mavenCentral()
-}
 
 dependencies {
     compile("io.opentelemetry:opentelemetry-api:${opentelemetryVersion}")
@@ -24,5 +11,4 @@ dependencies {
     compile("io.opentelemetry:opentelemetry-exporters-jaeger:${opentelemetryVersion}")
     compile("io.grpc:grpc-protobuf:1.28.0")
     compile("io.grpc:grpc-netty-shaded:1.28.0")
-    testCompile group: 'junit', name: 'junit', version: '4.12'
 }

examples/jaeger/gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +0,0 @@
-distributionBase=GRADLE_USER_HOME
-distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.3-bin.zip
-zipStoreBase=GRADLE_USER_HOME
-zipStorePath=wrapper/dists

examples/jaeger/gradlew

@@ -1,183 +0,0 @@
-#!/usr/bin/env sh
-
-#
-# Copyright 2015 the original author or authors.
-#
-# 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
-#
-#      https://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.
-#
-
-##############################################################################
-##
-##  Gradle start up script for UN*X
-##
-##############################################################################
-
-# Attempt to set APP_HOME
-# Resolve links: $0 may be a link
-PRG="$0"
-# Need this for relative symlinks.
-while [ -h "$PRG" ] ; do
-    ls=`ls -ld "$PRG"`
-    link=`expr "$ls" : '.*-> \(.*\)$'`
-    if expr "$link" : '/.*' > /dev/null; then
-        PRG="$link"
-    else
-        PRG=`dirname "$PRG"`"/$link"
-    fi
-done
-SAVED="`pwd`"
-cd "`dirname \"$PRG\"`/" >/dev/null
-APP_HOME="`pwd -P`"
-cd "$SAVED" >/dev/null
-
-APP_NAME="Gradle"
-APP_BASE_NAME=`basename "$0"`
-
-# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
-
-# Use the maximum available, or set MAX_FD != -1 to use that value.
-MAX_FD="maximum"
-
-warn () {
-    echo "$*"
-}
-
-die () {
-    echo
-    echo "$*"
-    echo
-    exit 1
-}
-
-# OS specific support (must be 'true' or 'false').
-cygwin=false
-msys=false
-darwin=false
-nonstop=false
-case "`uname`" in
-  CYGWIN* )
-    cygwin=true
-    ;;
-  Darwin* )
-    darwin=true
-    ;;
-  MINGW* )
-    msys=true
-    ;;
-  NONSTOP* )
-    nonstop=true
-    ;;
-esac
-
-CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
-
-# Determine the Java command to use to start the JVM.
-if [ -n "$JAVA_HOME" ] ; then
-    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
-        # IBM's JDK on AIX uses strange locations for the executables
-        JAVACMD="$JAVA_HOME/jre/sh/java"
-    else
-        JAVACMD="$JAVA_HOME/bin/java"
-    fi
-    if [ ! -x "$JAVACMD" ] ; then
-        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
-
-Please set the JAVA_HOME variable in your environment to match the
-location of your Java installation."
-    fi
-else
-    JAVACMD="java"
-    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
-
-Please set the JAVA_HOME variable in your environment to match the
-location of your Java installation."
-fi
-
-# Increase the maximum file descriptors if we can.
-if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
-    MAX_FD_LIMIT=`ulimit -H -n`
-    if [ $? -eq 0 ] ; then
-        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
-            MAX_FD="$MAX_FD_LIMIT"
-        fi
-        ulimit -n $MAX_FD
-        if [ $? -ne 0 ] ; then
-            warn "Could not set maximum file descriptor limit: $MAX_FD"
-        fi
-    else
-        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
-    fi
-fi
-
-# For Darwin, add options to specify how the application appears in the dock
-if $darwin; then
-    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
-fi
-
-# For Cygwin or MSYS, switch paths to Windows format before running java
-if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then
-    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
-    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
-    JAVACMD=`cygpath --unix "$JAVACMD"`
-
-    # We build the pattern for arguments to be converted via cygpath
-    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
-    SEP=""
-    for dir in $ROOTDIRSRAW ; do
-        ROOTDIRS="$ROOTDIRS$SEP$dir"
-        SEP="|"
-    done
-    OURCYGPATTERN="(^($ROOTDIRS))"
-    # Add a user-defined pattern to the cygpath arguments
-    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
-        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
-    fi
-    # Now convert the arguments - kludge to limit ourselves to /bin/sh
-    i=0
-    for arg in "$@" ; do
-        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
-        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
-
-        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
-            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
-        else
-            eval `echo args$i`="\"$arg\""
-        fi
-        i=`expr $i + 1`
-    done
-    case $i in
-        0) set -- ;;
-        1) set -- "$args0" ;;
-        2) set -- "$args0" "$args1" ;;
-        3) set -- "$args0" "$args1" "$args2" ;;
-        4) set -- "$args0" "$args1" "$args2" "$args3" ;;
-        5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
-        6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
-        7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
-        8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
-        9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
-    esac
-fi
-
-# Escape application args
-save () {
-    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
-    echo " "
-}
-APP_ARGS=`save "$@"`
-
-# Collect all arguments for the java command, following the shell quoting and substitution rules
-eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
-
-exec "$JAVACMD" "$@"

examples/jaeger/settings.gradle

@@ -1,2 +0,0 @@
-rootProject.name = 'opentelemetry-example-jaeger'
-

examples/jaeger/src/main/java/io/opentelemetry/example/JaegerExample.java

@@ -27,7 +27,8 @@ public class JaegerExample {
 
   private void setupJaegerExporter() {
     // Create a channel towards Jaeger end point
-    ManagedChannel jaegerChannel = ManagedChannelBuilder.forAddress(ip, port).usePlaintext().build();
+    ManagedChannel jaegerChannel =
+        ManagedChannelBuilder.forAddress(ip, port).usePlaintext().build();
     // Export traces to Jaeger
     this.jaegerExporter =
         JaegerGrpcSpanExporter.newBuilder()

examples/sdk-usage/README.md

@@ -9,15 +9,15 @@ This is a simple example that demonstrates how to use and configure the OpenTele
 ## Compile
 Compile with 
 ```shell script
-./gradlew fatJar
+../gradlew fatJar
 ```
 
 ## Run
 
 The following commands are used to run the examples.
 ```shell script
-java -cp build/libs/opentelemetry-example-sdk-usage-all-0.3.0-SNAPSHOT.jar io.opentelemetry.sdk.example.ConfigureTraceExample
+java -cp build/libs/opentelemetry-examples-sdk-usage-all-0.1.0-SNAPSHOT.jar io.opentelemetry.sdk.example.ConfigureTraceExample
 ```
 ```shell script
-java -cp build/libs/opentelemetry-example-sdk-usage-all-0.3.0-SNAPSHOT.jar io.opentelemetry.sdk.example.ConfigureSpanProcessorExample
+java -cp build/libs/opentelemetry-examples-sdk-usage-all-0.1.0-SNAPSHOT.jar io.opentelemetry.sdk.example.ConfigureSpanProcessorExample
 ```

examples/sdk-usage/build.gradle

@@ -1,38 +1,11 @@
 plugins {
     id 'java'
-    id 'com.github.sherter.google-java-format' version '0.8'
-    id "com.jfrog.artifactory" version "4.14.1"
 }
 
-group 'io.opentelemetry'
+description = 'OpenTelemetry Examples for SDK Usage'
-version '0.1.0-SNAPSHOT'
+ext.moduleName = "io.opentelemetry.examples.sdk.usage"
-
-def opentelemetryVersion = '0.3.0'
-
-//create a single Jar with all dependencies
-task fatJar(type: Jar) {
-    baseName = project.name + '-all'
-    from { configurations.compile.collect { it.isDirectory() ? it : zipTree(it) } }
-    with jar
-}
-
-googleJavaFormat {
-    toolVersion = '1.7'
-}
-
-compileJava.dependsOn(verifyGoogleJavaFormat)
-
-repositories {
-    mavenCentral()
-    jcenter()
-    maven {
-        // Add snapshot repository
-        url "https://oss.jfrog.org/artifactory/oss-snapshot-local"
-    }
-}
 
 dependencies {
     compile "io.opentelemetry:opentelemetry-sdk:${opentelemetryVersion}"
     compile "io.opentelemetry:opentelemetry-exporters-logging:${opentelemetryVersion}"
-    testCompile group: 'junit', name: 'junit', version: '4.12'
 }

examples/sdk-usage/gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +0,0 @@
-distributionBase=GRADLE_USER_HOME
-distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.3-bin.zip
-zipStoreBase=GRADLE_USER_HOME
-zipStorePath=wrapper/dists

examples/sdk-usage/gradlew

@@ -1,183 +0,0 @@
-#!/usr/bin/env sh
-
-#
-# Copyright 2015 the original author or authors.
-#
-# 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
-#
-#      https://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.
-#
-
-##############################################################################
-##
-##  Gradle start up script for UN*X
-##
-##############################################################################
-
-# Attempt to set APP_HOME
-# Resolve links: $0 may be a link
-PRG="$0"
-# Need this for relative symlinks.
-while [ -h "$PRG" ] ; do
-    ls=`ls -ld "$PRG"`
-    link=`expr "$ls" : '.*-> \(.*\)$'`
-    if expr "$link" : '/.*' > /dev/null; then
-        PRG="$link"
-    else
-        PRG=`dirname "$PRG"`"/$link"
-    fi
-done
-SAVED="`pwd`"
-cd "`dirname \"$PRG\"`/" >/dev/null
-APP_HOME="`pwd -P`"
-cd "$SAVED" >/dev/null
-
-APP_NAME="Gradle"
-APP_BASE_NAME=`basename "$0"`
-
-# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
-
-# Use the maximum available, or set MAX_FD != -1 to use that value.
-MAX_FD="maximum"
-
-warn () {
-    echo "$*"
-}
-
-die () {
-    echo
-    echo "$*"
-    echo
-    exit 1
-}
-
-# OS specific support (must be 'true' or 'false').
-cygwin=false
-msys=false
-darwin=false
-nonstop=false
-case "`uname`" in
-  CYGWIN* )
-    cygwin=true
-    ;;
-  Darwin* )
-    darwin=true
-    ;;
-  MINGW* )
-    msys=true
-    ;;
-  NONSTOP* )
-    nonstop=true
-    ;;
-esac
-
-CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
-
-# Determine the Java command to use to start the JVM.
-if [ -n "$JAVA_HOME" ] ; then
-    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
-        # IBM's JDK on AIX uses strange locations for the executables
-        JAVACMD="$JAVA_HOME/jre/sh/java"
-    else
-        JAVACMD="$JAVA_HOME/bin/java"
-    fi
-    if [ ! -x "$JAVACMD" ] ; then
-        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
-
-Please set the JAVA_HOME variable in your environment to match the
-location of your Java installation."
-    fi
-else
-    JAVACMD="java"
-    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
-
-Please set the JAVA_HOME variable in your environment to match the
-location of your Java installation."
-fi
-
-# Increase the maximum file descriptors if we can.
-if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
-    MAX_FD_LIMIT=`ulimit -H -n`
-    if [ $? -eq 0 ] ; then
-        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
-            MAX_FD="$MAX_FD_LIMIT"
-        fi
-        ulimit -n $MAX_FD
-        if [ $? -ne 0 ] ; then
-            warn "Could not set maximum file descriptor limit: $MAX_FD"
-        fi
-    else
-        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
-    fi
-fi
-
-# For Darwin, add options to specify how the application appears in the dock
-if $darwin; then
-    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
-fi
-
-# For Cygwin or MSYS, switch paths to Windows format before running java
-if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then
-    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
-    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
-    JAVACMD=`cygpath --unix "$JAVACMD"`
-
-    # We build the pattern for arguments to be converted via cygpath
-    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
-    SEP=""
-    for dir in $ROOTDIRSRAW ; do
-        ROOTDIRS="$ROOTDIRS$SEP$dir"
-        SEP="|"
-    done
-    OURCYGPATTERN="(^($ROOTDIRS))"
-    # Add a user-defined pattern to the cygpath arguments
-    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
-        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
-    fi
-    # Now convert the arguments - kludge to limit ourselves to /bin/sh
-    i=0
-    for arg in "$@" ; do
-        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
-        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
-
-        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
-            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
-        else
-            eval `echo args$i`="\"$arg\""
-        fi
-        i=`expr $i + 1`
-    done
-    case $i in
-        0) set -- ;;
-        1) set -- "$args0" ;;
-        2) set -- "$args0" "$args1" ;;
-        3) set -- "$args0" "$args1" "$args2" ;;
-        4) set -- "$args0" "$args1" "$args2" "$args3" ;;
-        5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
-        6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
-        7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
-        8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
-        9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
-    esac
-fi
-
-# Escape application args
-save () {
-    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
-    echo " "
-}
-APP_ARGS=`save "$@"`
-
-# Collect all arguments for the java command, following the shell quoting and substitution rules
-eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
-
-exec "$JAVACMD" "$@"

examples/sdk-usage/gradlew.bat

@@ -1,103 +0,0 @@
-@rem
-@rem Copyright 2015 the original author or authors.
-@rem
-@rem Licensed under the Apache License, Version 2.0 (the "License");
-@rem you may not use this file except in compliance with the License.
-@rem You may obtain a copy of the License at
-@rem
-@rem      https://www.apache.org/licenses/LICENSE-2.0
-@rem
-@rem Unless required by applicable law or agreed to in writing, software
-@rem distributed under the License is distributed on an "AS IS" BASIS,
-@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-@rem See the License for the specific language governing permissions and
-@rem limitations under the License.
-@rem
-
-@if "%DEBUG%" == "" @echo off
-@rem ##########################################################################
-@rem
-@rem  Gradle startup script for Windows
-@rem
-@rem ##########################################################################
-
-@rem Set local scope for the variables with windows NT shell
-if "%OS%"=="Windows_NT" setlocal
-
-set DIRNAME=%~dp0
-if "%DIRNAME%" == "" set DIRNAME=.
-set APP_BASE_NAME=%~n0
-set APP_HOME=%DIRNAME%
-
-@rem Resolve any "." and ".." in APP_HOME to make it shorter.
-for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
-
-@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
-
-@rem Find java.exe
-if defined JAVA_HOME goto findJavaFromJavaHome
-
-set JAVA_EXE=java.exe
-%JAVA_EXE% -version >NUL 2>&1
-if "%ERRORLEVEL%" == "0" goto init
-
-echo.
-echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
-echo.
-echo Please set the JAVA_HOME variable in your environment to match the
-echo location of your Java installation.
-
-goto fail
-
-:findJavaFromJavaHome
-set JAVA_HOME=%JAVA_HOME:"=%
-set JAVA_EXE=%JAVA_HOME%/bin/java.exe
-
-if exist "%JAVA_EXE%" goto init
-
-echo.
-echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
-echo.
-echo Please set the JAVA_HOME variable in your environment to match the
-echo location of your Java installation.
-
-goto fail
-
-:init
-@rem Get command-line arguments, handling Windows variants
-
-if not "%OS%" == "Windows_NT" goto win9xME_args
-
-:win9xME_args
-@rem Slurp the command line arguments.
-set CMD_LINE_ARGS=
-set _SKIP=2
-
-:win9xME_args_slurp
-if "x%~1" == "x" goto execute
-
-set CMD_LINE_ARGS=%*
-
-:execute
-@rem Setup the command line
-
-set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
-
-@rem Execute Gradle
-"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
-
-:end
-@rem End local scope for the variables with windows NT shell
-if "%ERRORLEVEL%"=="0" goto mainEnd
-
-:fail
-rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
-rem the _cmd.exe /c_ return code!
-if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
-exit /b 1
-
-:mainEnd
-if "%OS%"=="Windows_NT" endlocal
-
-:omega

examples/sdk-usage/settings.gradle

@@ -1,2 +0,0 @@
-rootProject.name = 'opentelemetry-example-sdk-usage'
-

examples/settings.gradle

@@ -0,0 +1,23 @@
+pluginManagement {
+    plugins {
+        id 'com.github.sherter.google-java-format' version "0.8"
+        id "com.jfrog.artifactory" version "4.13.0"
+        id 'com.google.protobuf' version '0.8.8'
+    }
+
+    repositories {
+        gradlePluginPortal()
+        google()
+    }
+}
+
+rootProject.name = "opentelemetry-java-examples"
+include ":opentelemetry-examples-grpc",
+        ":opentelemetry-examples-http",
+        ":opentelemetry-examples-jaeger",
+        ":opentelemetry-examples-sdk-usage"
+
+rootProject.children.each {
+    it.projectDir = "$rootDir/" + it.name
+       .replace("opentelemetry-examples-", "") as File
+}