de.elomagic.mag.google.BatchGoogleDriveClientFactory.java Source code

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Here is the source code for de.elomagic.mag.google.BatchGoogleDriveClientFactory.java

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/*
 * Mail Attachment Gateway
 * Copyright (c) 2016-2017 Carsten Rambow
 * mailto:developer AT elomagic DOT de
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package de.elomagic.mag.google;

import java.io.InputStream;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.nio.file.StandardOpenOption;
import java.util.Arrays;
import java.util.Collection;

import com.google.api.client.auth.oauth2.Credential;
import com.google.api.client.googleapis.auth.oauth2.GoogleCredential;
import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
import com.google.api.client.http.javanet.NetHttpTransport;
import com.google.api.client.json.jackson2.JacksonFactory;
import com.google.api.services.drive.Drive;
import com.google.api.services.drive.DriveScopes;

import org.apache.camel.component.google.drive.GoogleDriveClientFactory;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;

import de.elomagic.mag.Configuration;
import de.elomagic.mag.Configuration.ConfigurationKey;
import de.elomagic.mag.processors.PrepareGoogleDriveFileCreateProcessor;

/**
 *
 * @author Carsten Rambow
 */
public class BatchGoogleDriveClientFactory implements GoogleDriveClientFactory {

    private static final Logger LOGGER = LogManager.getLogger(PrepareGoogleDriveFileCreateProcessor.class);
    private NetHttpTransport httpTransport;

    public BatchGoogleDriveClientFactory() {
        try {
            this.httpTransport = GoogleNetHttpTransport.newTrustedTransport();//new NetHttpTransport();
        } catch (Exception ex) {
            LOGGER.error(ex.getMessage(), ex);
        }
    }

    @Override
    public Drive makeClient(final String clientId, final String clientSecret, final Collection<String> scopes,
            final String applicationName, final String refreshToken, final String accessToken) {
        Credential credential;
        try {
            credential = authorize();

            if (refreshToken != null && !"".equals(refreshToken)) {
                credential.setRefreshToken(refreshToken);
            }
            if (accessToken != null && !"".equals(accessToken)) {
                credential.setAccessToken(accessToken);
            }

            return DriveService.getDriveService(credential);
        } catch (Exception e) {
            LOGGER.error("Could not create Google Drive client.", e);
        }
        return null;
    }

    public Drive makeClient() throws Exception {
        Credential credential = authorize();

        return DriveService.getDriveService(credential);
    }

    /**
     * Authorizes the installed application to access user's protected data.
     *
     * @param clientId
     * @param clientSecret
     * @param scopes
     * @return
     * @throws Exception
     */
    private Credential authorize() throws Exception {

        Path configurationFile = Paths.get(Configuration.get(ConfigurationKey.TargetGoogleDriveCredentialFile));

        try (InputStream in = Files.newInputStream(configurationFile, StandardOpenOption.READ)) {
            return GoogleCredential.fromStream(in, httpTransport, JacksonFactory.getDefaultInstance())
                    .createScoped(Arrays.asList(DriveScopes.DRIVE_FILE));
        }

    }

}