Question

I'm new with Google Calendar API. What I'm trying to do here is to post an Event to the Google Calendar with the e-mail given by the user. My problem now is, when I tried to do the configuration, I get this exception:

Caused by: java.lang.ClassNotFoundException: com.google.api.client.util.Preconditions

I have tried different versions of the google api but I can't find which jar contains this class. The part on my code that's causing this exception is this :

GoogleAuthorizationCodeFlow flow = new GoogleAuthorizationCodeFlow.Builder(
                httpTransport, jsonFactory, clientId, clientSecret,
                Arrays.asList(CalendarScopes.CALENDAR)).setAccessType("online")
                .setApprovalPrompt("auto").build();

Thanks in advance to anyone who will help.

Here's my pom file:

<?xml version="1.0" encoding="UTF-8"?>
<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/maven-v4_0_0.xsd">
    <modelVersion>4.0.0</modelVersion>


    <version>0.0.1-SNAPSHOT</version>
    <packaging>war</packaging>


    <licenses>
        <license>
            <name>Apache License, Version 2.0</name>
            <distribution>repo</distribution>
            <url>http://www.apache.org/licenses/LICENSE-2.0.html</url>
        </license>
    </licenses>

    <properties>
        <!-- Explicitly declaring the source encoding eliminates the following 
            message: -->
        <!-- [WARNING] Using platform encoding (UTF-8 actually) to copy filtered 
            resources, i.e. build is platform dependent! -->
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>

        <!-- JBoss dependency versions -->
        <version.jboss.maven.plugin>7.4.Final</version.jboss.maven.plugin>

        <!-- Define the version of the JBoss BOMs we want to import to specify 
            tested stacks. -->
        <version.jboss.bom>1.0.7.Final</version.jboss.bom>


        <!-- other plugin versions -->
        <version.surefire.plugin>2.10</version.surefire.plugin>
        <version.war.plugin>2.1.1</version.war.plugin>
        <version.compiler.plugin>3.1</version.compiler.plugin>

        <!-- maven-compiler-plugin -->
        <maven.compiler.target>1.7</maven.compiler.target>
        <maven.compiler.source>1.7</maven.compiler.source>
    </properties>

    <repositories>
        <repository>
            <id>jboss-repo</id>
            <url>http://repository.jboss.org/nexus/content/groups/public-jboss/</url>
        </repository>
        <repository>
            <id>prime-repo</id>
            <name>PrimeFaces Maven Repository</name>
            <url>http://repository.primefaces.org</url>
        </repository>
        <repository>
            <id>mobicents-public-repository-group</id>
            <name>Mobicens Public Maven Repository Group</name>
            <url>https://oss.sonatype.org/content/groups/public</url>
            <layout>default</layout>
            <releases>
                <enabled>true</enabled>
                <updatePolicy>never</updatePolicy>
            </releases>
            <snapshots>
                <enabled>true</enabled>
                <updatePolicy>never</updatePolicy>
            </snapshots>
        </repository>
    </repositories>

    <dependencyManagement>
        <dependencies>
            <!-- JBoss distributes a complete set of Java EE 6 APIs including a Bill 
                of Materials (BOM). A BOM specifies the versions of a "stack" (or a collection) 
                of artifacts. We use this here so that we always get the correct versions 
                of artifacts. Here we use the jboss-javaee-6.0-with-tools stack (you can 
                read this as the JBoss stack of the Java EE 6 APIs, with some extras tools 
                for your project, such as Arquillian for testing) and the jboss-javaee-6.0-with-hibernate 
                stack you can read this as the JBoss stack of the Java EE 6 APIs, with extras 
                from the Hibernate family of projects) -->
            <dependency>
                <groupId>org.jboss.bom</groupId>
                <artifactId>jboss-javaee-6.0-with-tools</artifactId>
                <version>${version.jboss.bom}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <dependency>
                <groupId>org.jboss.bom</groupId>
                <artifactId>jboss-javaee-6.0-with-hibernate</artifactId>
                <version>${version.jboss.bom}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <dependency>
                <groupId>org.jboss.bom</groupId>
                <artifactId>jboss-javaee-6.0-with-security</artifactId>
                <version>${version.jboss.bom}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <dependencies>

        <!-- First declare the APIs we depend on and need for compilation. All 
            of them are provided by JBoss AS 7 -->

        <!-- Import the CDI API, we use provided scope as the API is included in 
            JBoss AS 7 -->
        <dependency>
            <groupId>javax.enterprise</groupId>
            <artifactId>cdi-api</artifactId>
            <scope>provided</scope>
        </dependency>

        <!-- Import the Common Annotations API (JSR-250), we use provided scope 
            as the API is included in JBoss AS 7 -->
        <dependency>
            <groupId>org.jboss.spec.javax.annotation</groupId>
            <artifactId>jboss-annotations-api_1.1_spec</artifactId>
            <scope>provided</scope>
        </dependency>

        <!-- Import the JAX-RS API, we use provided scope as the API is included 
            in JBoss AS 7 -->
        <dependency>
            <groupId>org.jboss.spec.javax.ws.rs</groupId>
            <artifactId>jboss-jaxrs-api_1.1_spec</artifactId>
            <scope>provided</scope>
        </dependency>

        <!-- Import the JPA API, we use provided scope as the API is included in 
            JBoss AS 7 -->
        <dependency>
            <groupId>org.hibernate.javax.persistence</groupId>
            <artifactId>hibernate-jpa-2.0-api</artifactId>
            <scope>provided</scope>
        </dependency>

        <!-- Import the EJB API, we use provided scope as the API is included in 
            JBoss AS 7 -->
        <dependency>
            <groupId>org.jboss.spec.javax.ejb</groupId>
            <artifactId>jboss-ejb-api_3.1_spec</artifactId>
            <scope>provided</scope>
        </dependency>

        <!-- JSR-303 (Bean Validation) Implementation -->
        <!-- Provides portable constraints such as @Email -->
        <!-- Hibernate Validator is shipped in JBoss AS 7 -->
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-validator</artifactId>
            <scope>provided</scope>
            <exclusions>
                <exclusion>
                    <groupId>org.slf4j</groupId>
                    <artifactId>slf4j-api</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

        <!-- Import the JSF API, we use provided scope as the API is included in 
            JBoss AS 7 -->
        <dependency>
            <groupId>org.jboss.spec.javax.faces</groupId>
            <artifactId>jboss-jsf-api_2.1_spec</artifactId>
            <scope>provided</scope>
        </dependency>

        <!-- Now we declare any tools needed -->

        <!-- Annotation processor to generate the JPA 2.0 metamodel classes for 
            typesafe criteria queries -->
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-jpamodelgen</artifactId>
            <scope>provided</scope>
        </dependency>

        <!-- Annotation processor that raising compilation errors whenever constraint 
            annotations are incorrectly used. -->
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-validator-annotation-processor</artifactId>
            <scope>provided</scope>
        </dependency>

        <!-- Needed for running tests (you may also use TestNG) -->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <scope>test</scope>
        </dependency>

        <!-- Optional, but highly recommended -->
        <!-- Arquillian allows you to test enterprise code such as EJBs and Transactional(JTA) 
            JPA from JUnit/TestNG -->
        <dependency>
            <groupId>org.jboss.arquillian.junit</groupId>
            <artifactId>arquillian-junit-container</artifactId>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>org.jboss.arquillian.protocol</groupId>
            <artifactId>arquillian-protocol-servlet</artifactId>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>org.jboss.spec.javax.el</groupId>
            <artifactId>jboss-el-api_2.2_spec</artifactId>
            <scope>provided</scope>
        </dependency>

        <dependency>
            <groupId>javax.mail</groupId>
            <artifactId>mail</artifactId>
        </dependency>

        <dependency>
            <groupId>org.antlr</groupId>
            <artifactId>ST4</artifactId>
            <version>4.0.7</version>
        </dependency>

        <dependency>
            <groupId>org.primefaces</groupId>
            <artifactId>primefaces</artifactId>
            <version>4.0</version>
        </dependency>

        <dependency>
            <groupId>org.primefaces.extensions</groupId>
            <artifactId>primefaces-extensions</artifactId>
            <version>1.1.0</version>
        </dependency>

        <dependency>
            <groupId>joda-time</groupId>
            <artifactId>joda-time</artifactId>
            <version>2.2</version>
        </dependency>

        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-lang3</artifactId>
            <version>3.0</version>
        </dependency>

        <!-- For File upload tag -->
        <dependency>
            <groupId>commons-fileupload</groupId>
            <artifactId>commons-fileupload</artifactId>
            <version>1.3</version>
        </dependency>

        <dependency>
            <groupId>commons-io</groupId>
            <artifactId>commons-io</artifactId>
            <version>2.4</version>
        </dependency>

        <dependency>
            <groupId>commons-lang</groupId>
            <artifactId>commons-lang</artifactId>
            <version>2.6</version>
        </dependency>

        <dependency>
            <groupId>commons-codec</groupId>
            <artifactId>commons-codec</artifactId>
            <version>1.8</version>
        </dependency>

        <dependency>
            <groupId>commons-beanutils</groupId>
            <artifactId>commons-beanutils</artifactId>
            <version>1.8.3</version>
        </dependency>

        <dependency>
            <groupId>commons-collections</groupId>
            <artifactId>commons-collections</artifactId>
            <version>3.2.1</version>
        </dependency>

        <dependency>
            <groupId>commons-logging</groupId>
            <artifactId>commons-logging</artifactId>
            <version>1.1.3</version>
        </dependency>

        <!-- For MimeType detection of uploaded files -->
        <dependency>
            <groupId>jmimemagic</groupId>
            <artifactId>jmimemagic</artifactId>
            <version>0.1.2</version>
            <scope>compile</scope>
        </dependency>

        <!-- For splitting pdf into individual pages -->
        <dependency>
            <groupId>com.itextpdf</groupId>
            <artifactId>itextpdf</artifactId>
            <version>5.3.4</version>
        </dependency>

        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>1.7.5</version>
        </dependency>

        <dependency>
            <groupId>org.omnifaces</groupId>
            <artifactId>omnifaces</artifactId>
            <version>1.6.3</version>
        </dependency>

        <!-- SIP servlet, cool stuff starts here -->
        <dependency>
            <groupId>org.mobicents.servlet.sip</groupId>
            <artifactId>sip-servlets-spec</artifactId>
            <version>2.1.0-SNAPSHOT</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>org.mobicents.servlet.sip</groupId>
            <artifactId>sip-servlets-client</artifactId>
            <version>2.1.0-SNAPSHOT</version>
            <scope>provided</scope>
        </dependency>

        <dependency>
            <groupId>com.google.code.gson</groupId>
            <artifactId>gson</artifactId>
            <version>2.2.4</version>
        </dependency>

        <dependency>
            <groupId>com.google.apis</groupId>
            <artifactId>google-api-services-calendar</artifactId>
            <version>v3-rev74-1.17.0-rc</version>
        </dependency>

        <dependency>
            <groupId>com.google.api-client</groupId>
            <artifactId>google-api-client</artifactId>
            <version>1.17.0-rc</version>
        </dependency>

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

        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi</artifactId>
            <version>3.10-beta1</version>
        </dependency>

        <dependency>
            <groupId>org.primefaces.themes</groupId>
            <artifactId>bootstrap</artifactId>
            <version>1.0.10</version>
        </dependency>

        <dependency>
            <groupId>javassist</groupId>
            <artifactId>javassist</artifactId>
            <version>3.12.1.GA</version>
        </dependency>

        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-core</artifactId>
        </dependency>

        <dependency>
            <groupId>org.jboss.as</groupId>
            <artifactId>jboss-as-controller-client</artifactId>
            <version>7.2.0.Final</version>
        </dependency>

        <dependency>
            <groupId>org.jboss.as.plugins</groupId>
            <artifactId>jboss-as-maven-plugin</artifactId>
            <version>7.5.Final</version>
            <scope>runtime</scope>
        </dependency>

        <dependency>
            <groupId>org.jboss.spec.javax.servlet</groupId>
            <artifactId>jboss-servlet-api_3.0_spec</artifactId>
        </dependency>

        <dependency>
            <groupId>org.jboss.seam.security</groupId>
            <artifactId>seam-security</artifactId>
            <version>3.2.0.Final</version>
            <scope>compile</scope>
        </dependency>

        <dependency>
            <groupId>com.sun.jersey</groupId>
            <artifactId>jersey-client</artifactId>
            <version>1.8</version>
        </dependency>

        <dependency>
            <groupId>org.codehaus.jackson</groupId>
            <artifactId>jackson-mapper-asl</artifactId>
            <version>1.8.5</version>
        </dependency>

        <dependency>
            <groupId>org.jboss.seam.faces</groupId>
            <artifactId>seam-faces</artifactId>
            <version>3.2.0.Final</version>
            <scope>compile</scope>
        </dependency>

        <dependency>
            <groupId>net.sf.jsr107cache</groupId>
            <artifactId>jsr107cache</artifactId>
            <version>1.1</version>
        </dependency>

        <dependency>
            <groupId>javax.jdo</groupId>
            <artifactId>jdo2-api</artifactId>
            <version>2.3-eb</version>
        </dependency>

    </dependencies>


    <build>
        <!-- Maven will append the version to the finalName (which is the name 
            given to the generated war, and hence the context root) -->
        <finalName>${project.artifactId}</finalName>
        <plugins>
            <!-- Compiler plugin enforces Java 1.6 compatibility and activates annotation 
                processors -->
            <plugin>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>${version.compiler.plugin}</version>
                <configuration>
                    <source>${maven.compiler.source}</source>
                    <target>${maven.compiler.target}</target>
                </configuration>
            </plugin>
            <plugin>
                <artifactId>maven-war-plugin</artifactId>
                <version>${version.war.plugin}</version>
                <configuration>
                    <!-- Java EE 6 doesn't require web.xml, Maven needs to catch up! -->
                    <failOnMissingWebXml>false</failOnMissingWebXml>
                </configuration>
            </plugin>
            <!-- The JBoss AS plugin deploys your war to a local JBoss AS container -->
            <!-- To use, run: mvn package jboss-as:deploy -->
            <plugin>
                <groupId>org.jboss.as.plugins</groupId>
                <artifactId>jboss-as-maven-plugin</artifactId>
                <version>${version.jboss.maven.plugin}</version>
            </plugin>
        </plugins>
    </build>

    <profiles>
        <profile>
            <!-- The default profile skips all tests, though you can tune it to run 
                just unit tests based on a custom pattern -->
            <!-- Seperate profiles are provided for running all tests, including Arquillian 
                tests that execute in the specified container -->
            <id>default</id>
            <activation>
                <activeByDefault>true</activeByDefault>
            </activation>
            <build>
                <plugins>
                    <plugin>
                        <artifactId>maven-surefire-plugin</artifactId>
                        <version>${version.surefire.plugin}</version>
                        <configuration>
                            <skip>true</skip>
                        </configuration>
                    </plugin>
                </plugins>
            </build>
        </profile>

        <profile>
            <!-- An optional Arquillian testing profile that executes tests in your 
                JBoss AS instance -->
            <!-- This profile will start a new JBoss AS instance, and execute the 
                test, shutting it down when done -->
            <!-- Run with: mvn clean test -Parq-jbossas-managed -->
            <id>arq-jbossas-managed</id>
            <dependencies>
                <dependency>
                    <groupId>org.jboss.as</groupId>
                    <artifactId>jboss-as-arquillian-container-managed</artifactId>
                    <scope>test</scope>
                </dependency>
            </dependencies>
        </profile>

        <profile>
            <!-- An optional Arquillian testing profile that executes tests in a remote 
                JBoss AS instance -->
            <!-- Run with: mvn clean test -Parq-jbossas-remote -->
            <id>arq-jbossas-remote</id>
            <dependencies>
                <dependency>
                    <groupId>org.jboss.as</groupId>
                    <artifactId>jboss-as-arquillian-container-remote</artifactId>
                    <scope>test</scope>
                </dependency>
            </dependencies>
        </profile>

        <profile>
            <!-- When built in OpenShift the 'openshift' profile will be used when 
                invoking mvn. -->
            <!-- Use this profile for any OpenShift specific customization your app 
                will need. -->
            <!-- By default that is to put the resulting archive into the 'deployments' 
                folder. -->
            <!-- http://maven.apache.org/guides/mini/guide-building-for-different-environments.html -->
            <id>openshift</id>
            <build>
                <plugins>
                    <plugin>
                        <artifactId>maven-war-plugin</artifactId>
                        <version>${version.war.plugin}</version>
                        <configuration>
                            <outputDirectory>deployments</outputDirectory>
                            <warName>ROOT</warName>
                        </configuration>
                    </plugin>
                </plugins>
            </build>
        </profile>

    </profiles>

</project>
Was it helpful?

Solution

It seems there is a conflict of versions between the modules google-api-client and google-http-client-jackson2. They must be of the same version 1.17.0-rc.

Licensed under: CC-BY-SA with attribution
Not affiliated with StackOverflow
scroll top