content: /*
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you 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 samples;
  
  import java.io.File;
  import java.io.FileOutputStream;
  import java.io.IOException;
  import java.io.OutputStreamWriter;
  import java.io.Writer;
  import java.util.ArrayList;
  import java.util.List;
  
  import com.aliyun.oss.ClientException;
  import com.aliyun.oss.OSS;
  import com.aliyun.oss.OSSClientBuilder;
  import com.aliyun.oss.OSSException;
  import com.aliyun.oss.model.CompleteMultipartUploadRequest;
  import com.aliyun.oss.model.GetObjectRequest;
  import com.aliyun.oss.model.InitiateMultipartUploadRequest;
  import com.aliyun.oss.model.InitiateMultipartUploadResult;
  import com.aliyun.oss.model.ObjectMetadata;
  import com.aliyun.oss.model.PartETag;
  import com.aliyun.oss.model.PutObjectRequest;
  import com.aliyun.oss.model.UploadPartCopyRequest;
  import com.aliyun.oss.model.UploadPartCopyResult;
  
  /**
   * This sample demonstrates how to upload parts by copy mode 
   * to Aliyun OSS using the OSS SDK for Java.
   */
  public class UploadPartCopySample {
      
      private static String endpoint = "*** Provide OSS endpoint ***";
      private static String accessKeyId = "*** Provide your AccessKeyId ***";
      private static String accessKeySecret = "*** Provide your AccessKeySecret ***";
      
      private static OSS client = null;
  
      private static String sourceBucketName = "*** Provide source bucket name ***";
      private static String sourceKey = "*** Provide source key ***";
      private static String targetBucketName = "*** Provide target bucket name ***";
      private static String targetKey = "*** Provide target key ***";
      
      private static String localFilePath = "*** Provide local file path ***";
      
      public static void main(String[] args) throws IOException {        
          /*
           * Constructs a client instance with your account for accessing OSS
           */
          client = new OSSClientBuilder().build(endpoint, accessKeyId, accessKeySecret);
          
          try {            
              /*
               * Upload an object to your source bucket
               */
              System.out.println("Uploading a new object to OSS from a file\n");
              client.putObject(new PutObjectRequest(sourceBucketName, sourceKey, createSampleFile()));
              
              /*
               * Claim a new upload id for your target bucket
               */
              InitiateMultipartUploadRequest initiateMultipartUploadRequest = new InitiateMultipartUploadRequest(targetBucketName, targetKey);
              InitiateMultipartUploadResult initiateMultipartUploadResult = client.initiateMultipartUpload(initiateMultipartUploadRequest);
              String uploadId = initiateMultipartUploadResult.getUploadId();
              
              /*
               * Calculate how many parts to be divided
               */
              final long partSize = 5 * 1024 * 1024L;   // 5MB
              ObjectMetadata metadata = client.getObjectMetadata(sourceBucketName, sourceKey);
              long objectSize = metadata.getContentLength();
              int partCount = (int) (objectSize / partSize);
              if (objectSize % partSize != 0) {
                  partCount++;
              }
              if (partCount > 10000) {
                  throw new RuntimeException("Total parts count should not exceed 10000");
              } else {                
                  System.out.println("Total parts count " + partCount + "\n");
              }
  
              /*
               * Upload multiparts by copy mode
               */
              System.out.println("Begin to upload multiparts by copy mode to OSS\n");
              List<PartETag> partETags = new ArrayList<PartETag>();
              for (int i = 0; i < partCount; i++) {
                  long startPos = i * partSize;
                  long curPartSize = (i + 1 == partCount) ? (objectSize - startPos) : partSize;;
  
                  UploadPartCopyRequest uploadPartCopyRequest = new UploadPartCopyRequest(
                          sourceBucketName, sourceKey, targetBucketName, targetKey);
                  uploadPartCopyRequest.setUploadId(uploadId);
                  uploadPartCopyRequest.setPartSize(curPartSize);
                  uploadPartCopyRequest.setBeginIndex(startPos);
                  uploadPartCopyRequest.setPartNumber(i + 1);
                  
                  UploadPartCopyResult uploadPartCopyResult = client.uploadPartCopy(uploadPartCopyRequest);
                  System.out.println("\tPart#" + uploadPartCopyResult.getPartNumber() + " done\n");
                  partETags.add(uploadPartCopyResult.getPartETag());
              }
              
              /*
               * Complete to upload multiparts
               */
              System.out.println("Completing to upload multiparts\n");
              CompleteMultipartUploadRequest completeMultipartUploadRequest = new CompleteMultipartUploadRequest(
                      targetBucketName, targetKey, uploadId, partETags);
              client.completeMultipartUpload(completeMultipartUploadRequest);
              
              /*
               * Fetch the object that newly created at the step below.
               */
              System.out.println("Fetching an object");
              client.getObject(new GetObjectRequest(targetBucketName, targetKey), new File(localFilePath));
              
          } catch (OSSException oe) {
              System.out.println("Caught an OSSException, which means your request made it to OSS, "
                      + "but was rejected with an error response for some reason.");
              System.out.println("Error Message: " + oe.getErrorMessage());
              System.out.println("Error Code:       " + oe.getErrorCode());
              System.out.println("Request ID:      " + oe.getRequestId());
              System.out.println("Host ID:           " + oe.getHostId());
          } catch (ClientException ce) {
              System.out.println("Caught an ClientException, which means the client encountered "
                      + "a serious internal problem while trying to communicate with OSS, "
                      + "such as not being able to access the network.");
              System.out.println("Error Message: " + ce.getMessage());
          } finally {
              /*
               * Do not forget to shut down the client finally to release all allocated resources.
               */
              client.shutdown();
          }
      }
      
      private static File createSampleFile() throws IOException {
          File file = File.createTempFile("oss-java-sdk-", ".txt");
          file.deleteOnExit();
  
          Writer writer = new OutputStreamWriter(new FileOutputStream(file));
          for (int i = 0; i < 1000000; i++) {
              writer.write("abcdefghijklmnopqrstuvwxyz\n");
              writer.write("0123456789011234567890\n");
          }
          writer.close();
  
          return file;
      }
  }
  