Xpage java code to interact with gmail api

Question

Using Domino Designer 9.0.1FP3 how can I use Gmail API?

Tried sample Java code from this link https://developers.google.com/gmail/api/quickstart/java without any luck as follows:

1. Imported necessary gmail api .jar latest version.
2. Installed jre is 8 and setup build path for jre 8 path
3. Complier JRE version is still same which 1.5 by default.

Any help will be appreciated.

This is java agent to interact with gmail api:

import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.Arrays;
import java.util.List;

import lotus.domino.*;

import com.google.api.client.auth.oauth2.Credential;
import com.google.api.client.extensions.java6.auth.oauth2.AuthorizationCodeInstalledApp;
import com.google.api.client.extensions.jetty.auth.oauth2.LocalServerReceiver;
import com.google.api.client.googleapis.auth.oauth2.GoogleAuthorizationCodeFlow;
import com.google.api.client.googleapis.auth.oauth2.GoogleClientSecrets;
import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
import com.google.api.client.http.HttpTransport;
import com.google.api.client.json.jackson2.JacksonFactory;
import com.google.api.client.json.JsonFactory;
import com.google.api.client.util.store.FileDataStoreFactory;
//import com.google.api.*;
/***/The following lines has error "import can not be resolved". I've imported jar and their sources from gmail .jar file zip***
import com.google.api.services.gmail.*;
import com.google.api.services.gmail.GmailScopes;
import com.google.api.services.gmail.model.*;
import com.google.api.services.gmail.Gmail;





public class JavaAgent extends AgentBase {


    public void NotesMain() {
         /** Application name. */
        final String APPLICATION_NAME =
            "Gmail API Java Quickstart";
        /** Directory to store user credentials for this application. */
        final java.io.File DATA_STORE_DIR = new java.io.File(
            System.getProperty("user.home"), ".credentials/gmail-java-quickstart");

        FileDataStoreFactory DATA_STORE_FACTORY;

        /** Global instance of the JSON factory. */
        final JsonFactory JSON_FACTORY =
            JacksonFactory.getDefaultInstance();

        HttpTransport HTTP_TRANSPORT;

        /* Global instance of the scopes required by this quickstart. */
        final List<String> SCOPES =
         //   Arrays.asList(com.google.api.services.gmail.GmailScopes.)//.GMAIL_LABELS);
Arrays.asList(com.google.api.)

        try {
          Session session = getSession();
          AgentContext agentContext = session.getAgentContext();

          // (Your code goes here)

      } catch(Exception e) {
          e.printStackTrace();
       }
   }

Answer 1

Ok, you need to make sure that the API can actually run on a Java 1.6 as Per mentions.

You can add the jar(s) to your Domino in several ways:

1. In the JVM ext/lib directory

This works fine - it is just a pain to maintain as everthing needs to be done in the file system (also in your Domino Designer). This works for XPages as well as agents.

2. Attach the jar to your agent/script library

This only applies to code running in agents (or webservices). However, there is a memory leak which occurs every time the code is called (and the jar is detached internally). So don't use this one!

3. Add the jar as a jar design element

This should also work - though I haven't got much experience with it. I fear the same issues as with the element above - but has no evidence on that. So you are probably fine using this - will only work for XPages.

4. Add the jar as a plugin

You can wrap the jar into an OSGi plugin and deploy it server wide (2 and 3 above only makes the jar available to the NSF the jar is inside). This is by far my preferred way. I have written an article about the details that can help you on the way.

/John

Answer 2

1. Installed jdk1.7.079
2. In project properties->Java Build Path set it up as JRE System Library(jdk1.7.079)

No more compilation error.