Booking Server (REST) Skeleton for Java

This ia a reference implementation for API v3 Booking server based on:

• google-protobuf
• Jersey RESTful Web Services

Prerequisites

Require installations of

• Apache Maven
• Protocol compiler for java
• Apache Tomcat

Get Started

1. Copy the Proto Interface into a proto file (api_v3.proto). Modify the package to match your project (com.partner.mapsbooking.v3.model).

   • If implementing waitlist functionality, repeat the same steps with the Waitlist Proto Interface

2. Create a web application project in your IDE named booking_server_v3, add Maven support to this project.

3. Place your proto file under the src/main/resources, add dependencies for Jersey and protocol buffers runtime to the Maven pom.xml file:

        <dependencyManagement>
            <dependencies>
                <dependency>
                    <groupId>org.glassfish.jersey</groupId>
                    <artifactId>jersey-bom</artifactId>
                    <version>${jersey.version}</version>
                    <type>pom</type>
                    <scope>import</scope>
                </dependency>
            </dependencies>
        </dependencyManagement>
   
        <dependencies>
            <dependency>
                <groupId>org.glassfish.jersey.containers</groupId>
                <artifactId>jersey-container-servlet-core</artifactId>
            </dependency>
            <dependency>
                <groupId>org.glassfish.jersey.media</groupId>
                <artifactId>jersey-media-json-jackson</artifactId>
                <version>2.27</version>
            </dependency>
            <dependency>
                <groupId>com.google.protobuf</groupId>
                <artifactId>protobuf-java</artifactId>
                <version>3.5.1</version>
            </dependency>
            <dependency>
                <groupId>io.grpc</groupId>
                <artifactId>grpc-protobuf</artifactId>
                <version>1.11.0</version>
            </dependency>
        </dependencies>
   
        <properties>
            <java.version>1.8</java.version>
            <jersey.version>2.23.2</jersey.version>
        </properties>
   

4. Execute the following command under src/main to auto-generate a source file for the classes defined in the proto file:

    protoc --java_out=java resources/api_v3.proto
   

   • If implementing waitlist functionality, also execute the following: protoc --java_out=java resources/waitlist.proto

5. Inside of the src/main/java, create a new package matching your groupId (com.partner.mapsbooking). Retrieve the sample code from the repo:

    git clone https://maps-booking.googlesource.com/java-maps-booking-rest-server-v3-skeleton
   

   place the files under your package, follow the TODOs to complete your implementation.

6. Configure your servlet by modifying the web.xml file:

   <?xml version="1.0" encoding="UTF-8"?>
   <web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
            xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
            xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
            version="4.0">
   
       <servlet>
           <servlet-name>Booking Rest Server</servlet-name>
           <servlet-class>org.glassfish.jersey.servlet.ServletContainer</servlet-class>
           <init-param>
               <param-name>jersey.config.server.provider.packages</param-name>
               <param-value>com.partner.mapsbooking</param-value>
           </init-param>
           <load-on-startup>1</load-on-startup>
       </servlet>
   
       <servlet-mapping>
           <servlet-name>Booking Rest Server</servlet-name>
           <url-pattern>/mapsbooking/*</url-pattern>
       </servlet-mapping>
   </web-app>
   

7. In the Run Configurations, set up a Tomcat server configuration. Add all the jars to the /WEB_INF/lib directory (project structure -> artifacts -> After selecting all jars right click and choose “Put into /WEB-INF/lib”).

8. Run Tomcat to start your server.

Final Directory Structure

  src
  |---main
      |---java
          |---com.partner.mapsbooking
              |---rest
                  |---BookingService.java
                  |---BookingExceptionMapper.java
                  |---Error.java
              |---authentication
                  |---AuthenticationService.java
                  |---RestAuthenticationFilter.java
              |---v3.model
                  |---ApiV3.java
                  |---Waitlist.java
      |---resources
          |---api_v3.proto
          |---waitlist.proto
  |---test