/*
 * Copyright 2022 Google LLC
 *
 * 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 com.example.storage.object;

// [START storage_stream_file_upload]

import com.google.cloud.WriteChannel;
import com.google.cloud.storage.BlobId;
import com.google.cloud.storage.BlobInfo;
import com.google.cloud.storage.Storage;
import com.google.cloud.storage.StorageOptions;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.charset.StandardCharsets;

public class StreamObjectUpload {

  public static void streamObjectUpload(
      String projectId, String bucketName, String objectName, String contents) throws IOException {
    // The ID of your GCP project
    // String projectId = "your-project-id";

    // The ID of your GCS bucket
    // String bucketName = "your-unique-bucket-name";

    // The ID of your GCS object
    // String objectName = "your-object-name";

    // The string of contents you wish to upload
    // String contents = "Hello world!";

    Storage storage = StorageOptions.newBuilder().setProjectId(projectId).build().getService();
    BlobId blobId = BlobId.of(bucketName, objectName);
    BlobInfo blobInfo = BlobInfo.newBuilder(blobId).build();
    byte[] content = contents.getBytes(StandardCharsets.UTF_8);
    try (WriteChannel writer = storage.writer(blobInfo)) {
      writer.write(ByteBuffer.wrap(content));
      System.out.println(
          "Wrote to " + objectName + " in bucket " + bucketName + " using a WriteChannel.");
    }
  }
}

// [END storage_stream_file_upload]
