first commit

.gradle/buildOutputCleanup/cache.properties

+#Fri Apr 02 10:31:14 CEST 2021
+gradle.version=6.7

.idea/.gitignore

+# Default ignored files
+/shelf/
+/workspace.xml
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml
+# Editor-based HTTP Client requests
+/httpRequests/

.idea/compiler.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="CompilerConfiguration">
+    <bytecodeTargetLevel target="1.8" />
+  </component>
+</project>
\ No newline at end of file

.idea/gradle.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="GradleSettings">
+    <option name="linkedExternalProjectsSettings">
+      <GradleProjectSettings>
+        <option name="distributionType" value="DEFAULT_WRAPPED" />
+        <option name="externalProjectPath" value="$PROJECT_DIR$" />
+        <option name="modules">
+          <set>
+            <option value="$PROJECT_DIR$" />
+          </set>
+        </option>
+      </GradleProjectSettings>
+    </option>
+  </component>
+</project>
\ No newline at end of file

.idea/jarRepositories.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="RemoteRepositoriesConfiguration">
+    <remote-repository>
+      <option name="id" value="central" />
+      <option name="name" value="Maven Central repository" />
+      <option name="url" value="https://repo1.maven.org/maven2" />
+    </remote-repository>
+    <remote-repository>
+      <option name="id" value="jboss.community" />
+      <option name="name" value="JBoss Community repository" />
+      <option name="url" value="https://repository.jboss.org/nexus/content/repositories/public/" />
+    </remote-repository>
+    <remote-repository>
+      <option name="id" value="MavenRepo" />
+      <option name="name" value="MavenRepo" />
+      <option name="url" value="https://repo.maven.apache.org/maven2/" />
+    </remote-repository>
+  </component>
+</project>
\ No newline at end of file

.idea/misc.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ExternalStorageConfigurationManager" enabled="true" />
+  <component name="FrameworkDetectionExcludesConfiguration">
+    <file type="web" url="file://$PROJECT_DIR$" />
+  </component>
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" default="true" project-jdk-name="1.8" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/out" />
+  </component>
+</project>
\ No newline at end of file

.idea/modules/GRPC_example.iml

+<?xml version="1.0" encoding="UTF-8"?>
+<module external.linked.project.id="GRPC_example" external.linked.project.path="$MODULE_DIR$/../.." external.root.project.path="$MODULE_DIR$/../.." external.system.id="GRADLE" type="JAVA_MODULE" version="4" />
\ No newline at end of file

README.md

+# Setup ProtocolBuffer and GRPC
+This repository contains a simple example that enables you to test the environment for **ProtocolBuffer** and **GRPC**.
+
+* You can import the project directly from a **V**ersion **C**ontrol **S**ystem, by providing the following URL: 
+https://ewserver.di.unimi.it/gitlab/riccardopresotto/setup_grpc.git
+
+<img src = './assets/img_1.png'>
+
+* Otherwise, take care to import the project as a Gradle Project
+
+* Compile the .proto files: 
+	1.  Open the terminal of the IntelliJ IDE
+	2. Run the following command:
+		* **Windows**: *gradlew build*
+		* **MacOS/Linux**: *./gradlew build*
+	3. Check if some files have been generated in the directory *setup_grpc/build/generated/source/proto/main/java*
+
+* The testing files are located in the directory: *setup_grpc/src/main/java/researcher*
+
+

build.gradle

+plugins {
+    id "com.google.protobuf" version "0.8.10" // for GRPC
+    id "java"
+    id "war" // for REST
+}
+
+group 'org.example'
+version '1.0-SNAPSHOT'
+
+repositories {
+    mavenCentral()
+}
+
+dependencies {
+    testImplementation 'org.junit.jupiter:junit-jupiter-api:5.6.0'
+    testRuntimeOnly 'org.junit.jupiter:junit-jupiter-engine'
+
+    //start GRPC
+    // https://mvnrepository.com/artifact/com.google.protobuf/protobuf-java
+    compile group: 'com.google.protobuf', name: 'protobuf-java', version: '3.10.0'
+
+    // https://mvnrepository.com/artifact/io.grpc/grpc-all
+    compile group: 'io.grpc', name: 'grpc-all', version: '1.25.0'
+    //end GRPC
+
+    /* REST Dependencies
+
+    // https://mvnrepository.com/artifact/org.codehaus.jackson/jackson-core-asl
+    compile group: 'org.codehaus.jackson', name: 'jackson-core-asl', version: '1.9.2'
+    // https://mvnrepository.com/artifact/org.codehaus.jackson/jackson-jaxrs
+    compile group: 'org.codehaus.jackson', name: 'jackson-jaxrs', version: '1.9.2'
+    // https://mvnrepository.com/artifact/org.codehaus.jackson/jackson-mapper-asl
+    compile group: 'org.codehaus.jackson', name: 'jackson-mapper-asl', version: '1.9.2'
+    // https://mvnrepository.com/artifact/org.codehaus.jackson/jackson-xc
+    compile group: 'org.codehaus.jackson', name: 'jackson-xc', version: '1.9.2'
+    // https://mvnrepository.com/artifact/com.sun.jersey/jersey-client
+    compile group: 'com.sun.jersey', name: 'jersey-client', version: '1.19.1'
+    // https://mvnrepository.com/artifact/com.sun.jersey/jersey-core
+    compile group: 'com.sun.jersey', name: 'jersey-core', version: '1.19.1'
+    // https://mvnrepository.com/artifact/com.sun.jersey/jersey-json
+    compile group: 'com.sun.jersey', name: 'jersey-json', version: '1.19.1'
+    // https://mvnrepository.com/artifact/com.sun.jersey/jersey-server
+    compile group: 'com.sun.jersey', name: 'jersey-server', version: '1.19.1'
+    // https://mvnrepository.com/artifact/com.sun.jersey/jersey-servlet
+    compile group: 'com.sun.jersey', name: 'jersey-servlet', version: '1.19.1'
+    // https://mvnrepository.com/artifact/org.codehaus.jettison/jettison
+    compile group: 'org.codehaus.jettison', name: 'jettison', version: '1.1'
+    // https://mvnrepository.com/artifact/javax.ws.rs/jsr311-api
+    compile group: 'javax.ws.rs', name: 'jsr311-api', version: '1.1.1'
+    // https://mvnrepository.com/artifact/com.sun.jersey/jersey-server
+    compile group: 'com.sun.jersey', name: 'jersey-server', version: '1.2'
+
+    */
+
+
+
+    /* MQTT Dependencies
+    // https://mvnrepository.com/artifact/org.eclipse.paho/org.eclipse.paho.client.mqttv3
+    compile group: 'org.eclipse.paho', name: 'org.eclipse.paho.client.mqttv3', version: '1.2.5'
+    */
+}
+
+
+//start GRPC
+sourceSets {
+    main {
+        java {
+            srcDirs 'build/generated/source/proto/main/grpc'
+            srcDirs 'build/generated/source/proto/main/java'
+        }
+    }
+}
+
+protobuf {
+    protoc {
+        artifact = 'com.google.protobuf:protoc:3.10.1'
+    }
+
+    plugins {
+        grpc {
+            artifact = 'io.grpc:protoc-gen-grpc-java:1.25.0'
+        }
+    }
+
+    generateProtoTasks {
+        all()*.plugins {
+            grpc {}
+        }
+    }
+}
+
+//end GRPC
+
+
+test {
+    useJUnitPlatform()
+}
\ No newline at end of file

build/tmp/war/MANIFEST.MF

+Manifest-Version: 1.0
+

gradle/wrapper/gradle-wrapper.properties

+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.7-bin.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists

gradlew

+#!/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 "$JAVACMD" "$@"

gradlew.bat

+@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 execute
+
+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 execute
+
+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
+
+: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 %*
+
+: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

settings.gradle

+rootProject.name = 'GRPC_example'
+

src/main/java/researcher/Client.java

+package researcher;
+
+import it.ewlab.researcher.ResearcherOuterClass.Researcher;
+
+import java.io.IOException;
+import java.net.Socket;
+
+public class Client {
+
+    public static void main(String[] args) throws IOException {
+
+        Socket s = new Socket("localhost", 9999);
+
+        Researcher r =
+                Researcher.newBuilder()
+                        .setName("Gabriele")
+                        .setSurname("Civitarese")
+                        .setType(Researcher.ResearcherType.POSTDOC)
+                        .addPaper(Researcher.Paper.newBuilder().setTitle("Activity Recognition")
+                                .setYear(2014).build())
+                        .addPaper(Researcher.Paper.newBuilder().setTitle("Activity Recognition Again")
+                                .setYear(2015).build())
+                        .build();
+
+        r.writeTo(s.getOutputStream());
+
+        s.close();
+
+
+    }
+}

src/main/java/researcher/Server.java

+package researcher;
+
+import it.ewlab.researcher.ResearcherOuterClass.Researcher;
+
+import java.io.IOException;
+import java.net.ServerSocket;
+import java.net.Socket;
+
+public class Server {
+
+    public static void main(String[] args) throws IOException {
+
+
+        ServerSocket serverSocket = new ServerSocket(9999);
+
+        Socket s = serverSocket.accept();
+
+        Researcher r = Researcher.parseFrom(s.getInputStream());
+
+        System.out.println(r);
+    }
+
+
+}

src/main/proto/Researcher.proto

+package it.ewlab.researcher;
+
+message Researcher {
+    required string name = 1;
+    required string surname = 2;
+
+    enum ResearcherType {
+        PHDSTUDENT = 0;
+        POSTDOC = 1;
+        ASSISTANTPROFESSOR = 2;
+    }
+
+    message Paper {
+        required string title = 1;
+        required int32 year = 2;
+
+    }
+
+    repeated Paper paper = 3;
+    optional ResearcherType type = 4;
+}
\ No newline at end of file