Maven usage of google api

Question

I'm using the google calendar java API for a project.

The calendar part is fine, maven seems to download it and use it without any hassle.

My problem comes from the main dependency of this lib: the com.google.api.client api.

In particular, when I follow the instructions detailed at this page, maven can't compile my project properly:

package com.google.api.client.extensions.java6.auth.oauth2 does not exist
package com.google.api.client.extensions.jetty.auth.oauth2 does not exist
package com.google.api.client.json.jackson2 does not exist

It lacks several classes and thus can't compile the file while when I download the zip and add the .jar manually without using maven it works fine.

It's the first project I manage with maven and don't know how to go from there. Pointers would be appreciated.

edit post request --- here is my POM

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>

  <groupId>fr.univnantes.atal.atcal</groupId>
  <artifactId>AtCal</artifactId>
  <version>0.1</version>
  <packaging>jar</packaging>

  <name>AtCal</name>
  <url>http://maven.apache.org</url>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
  </properties>

  <repositories>
    <repository>
      <id>google-api-services</id>
      <url>http://google-api-client-libraries.appspot.com/mavenrepo</url>
    </repository>
  </repositories>

  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>3.8.1</version>
      <scope>test</scope>
    </dependency>
    <dependency>
      <groupId>com.google.api-client</groupId>
      <artifactId>google-api-client</artifactId>
      <version>1.12.0-beta</version>
    </dependency>
    <dependency>
      <groupId>com.google.apis</groupId>
      <artifactId>google-api-services-calendar</artifactId>
      <version>v3-rev20-1.12.0-beta</version>
    </dependency>
  </dependencies>

  <build>
    <pluginManagement>
      <plugins>
    <plugin>
      <groupId>org.apache.maven.plugins</groupId>
      <artifactId>maven-compiler-plugin</artifactId>
      <!-- best lock down version of the plugin too -->
      <configuration>
        <source>1.5</source>
        <target>1.5</target>
      </configuration>
    </plugin>
      </plugins>
    </pluginManagement>
  </build>
</project>

I basicly added two dependencies: calendar and api client. It was the mentionned step to get things working on the doc.

Answer 1

As of a few months ago, Google started pushing libraries to the Sonatype repo. You no longer should include a repository entry in your pom.xml pointing to google-api-client-libraries.appspot.com/mavenrepo or mavenrepo.google-api-java-client.googlecode.com

Doing that slows down your builds because you end up checking for all dependencies (even non Google ones) at that repository. These checks 404, then you check the master repository.

Answer 2

I had adventure with google custom search api. Most of the problem were due to unavailability of mvn repo http://google-api-client-libraries.appspot.com/mavenrepo.

Custom search jar I took from:

<repository>
  <id>google-api-services</id>
  <url>http://mavenrepo.google-api-java-client.googlecode.com/hg</url>
</repository>

It was in pom inside the jar downloaded manually. Newest google-api-client and google-http-client-jackson (at 1.13.2-beta JacksonFactory is an additional dependency) were in central maven repo.

Answer 3

It seems that the seemingly very beta-ish google-api-services-calendar:v3-rev20-1.12.0-beta isn't pushed to the sontaype repository yet, but if you try to include both the recommended repo and the one mentioned under the Calendar API in your POM:

<repositories>
    <repository>
        <id>google-api-services</id>
        <url>https://oss.sonatype.org/content/repositories/releases/</url>
    </repository>
    <repository>
        <id>google-api-services-beta</id>
        <url>http://google-api-client-libraries.appspot.com/mavenrepo</url>
    </repository>
</repositories>

Also, the following additional dependencies seem to be necessary:

<dependency>
    <groupId>com.google.api-client</groupId>
    <artifactId>google-api-client-java6</artifactId>
    <version>1.12.0-beta</version>
</dependency>
<dependency>
    <groupId>com.google.oauth-client</groupId>
    <artifactId>google-oauth-client-jetty</artifactId>
    <version>1.12.0-beta</version>
</dependency>
<dependency>
    <groupId>com.google.http-client</groupId>
    <artifactId>google-http-client-jackson2</artifactId>
    <version>1.12.0-beta</version>
</dependency>

Hope that helps.