I am trying to get a clean code sample of Google API OAuth2 authentication. My code is mostly based on the explanation at https://code.google.com/p/google-api-java-client/wiki/OAuth2
I deviate from this tutorial because I want my libraries be managed by Maven and because I want to create a project without Google Apps Engine dependencies.
Each time I try to the run the project on my Glassfish server, I get the following error, probably indicating a dependency conflict.
java.lang.NoSuchMethodError: com.google.api.client.json.JsonFactory.fromInputStream(Ljava/io/InputStream;Ljava/lang/Class;)Ljava/lang/Object;
The relevant piece of my pom.xml:
<dependencies> <dependency> <groupId>com.google.api-client</groupId> <artifactId>google-api-client</artifactId> <version>1.14.1-beta</version> </dependency> <dependency> <groupId>com.google.http-client</groupId> <artifactId>google-http-client</artifactId> <version>1.14.1-beta</version> </dependency> <dependency> <groupId>com.google.api-jackson2</groupId> <artifactId>google-api-jackson2</artifactId> <version>1.14.1-beta</version> </dependency> <dependency> <groupId>com.google.apis</groupId> <artifactId>google-api-services-calendar</artifactId> <version>v3-rev34-1.14.1-beta</version> </dependency> <dependency> <groupId>com.google.oauth-client</groupId> <artifactId>google-oauth-client</artifactId> <version>1.14.1-beta</version> </dependency> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-core</artifactId> <version>2.1.3</version> </dependency> <dependency> <groupId>com.google.oauth-client</groupId> <artifactId>google-oauth-client-servlet</artifactId> <version>1.14.1-beta</version> </dependency> <dependency> <groupId>javax.persistence</groupId> <artifactId>persistence-api</artifactId> <version>1.0.2</version> </dependency> <dependency> <groupId>javax.validation</groupId> <artifactId>validation-api</artifactId> <version>1.1.0.CR2</version> </dependency> <dependency> <groupId>javax.faces</groupId> <artifactId>jsf-api</artifactId> <version>2.1</version> </dependency> <dependency> <groupId>javax.enterprise</groupId> <artifactId>cdi-api</artifactId> <version>1.1-PRD</version> </dependency> <dependency> <groupId>javax.servlet</groupId> <artifactId>javax.servlet-api</artifactId> <version>3.0.1</version> </dependency> <dependency> <groupId>javax.annotation</groupId> <artifactId>jsr250-api</artifactId> <version>1.0</version> </dependency> <dependency> <groupId>javax</groupId> <artifactId>javaee-web-api</artifactId> <version>6.0</version> </dependency> </dependencies> Please help me find the root cause of this error, because the used dependencies seem just fine to me and there's no similar problem case I could find.
