HADOOP-19256 Integrate PutIfNotExist functionality into S3A createFile()

hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/Constants.java

@@ -1439,6 +1439,13 @@ private Constants() {
    */
   public static final String FS_S3A_CREATE_PERFORMANCE = "fs.s3a.create.performance";
 
+  /**
+   * Flag for commit if none match.
+   * This can be set in the {code createFile()} builder.
+   * Value {@value}.
+   */
+  public static final String FS_S3A_CONDITIONAL_FILE_CREATE = "fs.s3a.conditional.file.create";
+
   /**
    * Default value for create performance in an S3A FS.
    * Value {@value}.

hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/S3ABlockOutputStream.java

@@ -77,6 +77,7 @@
 
 import static java.util.Objects.requireNonNull;
 import static org.apache.hadoop.fs.s3a.Statistic.*;
+import static org.apache.hadoop.fs.s3a.impl.AWSHeaders.IF_NONE_MATCH;
 import static org.apache.hadoop.fs.s3a.impl.HeaderProcessing.CONTENT_TYPE_OCTET_STREAM;
 import static org.apache.hadoop.fs.s3a.impl.ProgressListenerEvent.*;
 import static org.apache.hadoop.fs.s3a.statistics.impl.EmptyS3AStatisticsContext.EMPTY_BLOCK_OUTPUT_STREAM_STATISTICS;
@@ -690,20 +691,28 @@ private long putObject() throws IOException {
     final S3ADataBlocks.DataBlock block = getActiveBlock();
     final long size = block.dataSize();
     final S3ADataBlocks.BlockUploadData uploadData = block.startUpload();
-    final PutObjectRequest putObjectRequest =
+    PutObjectRequest putObjectRequest =
         writeOperationHelper.createPutObjectRequest(
             key,
             uploadData.getSize(),
             builder.putOptions);
     clearActiveBlock();
 
+    PutObjectRequest.Builder maybeModifiedPutIfAbsentRequest = putObjectRequest.toBuilder();
+    Map<String, String> optionHeaders = builder.putOptions.getHeaders();
+    if (builder.isConditionalPutEnabled){
+        maybeModifiedPutIfAbsentRequest.overrideConfiguration(
+            override -> override.putHeader(IF_NONE_MATCH, optionHeaders.get(IF_NONE_MATCH)));
+    }
+    final PutObjectRequest finalizedRequest = maybeModifiedPutIfAbsentRequest.build();
+
     BlockUploadProgress progressCallback =
         new BlockUploadProgress(block, progressListener, now());
     statistics.blockUploadQueued(size);
     try {
       progressCallback.progressChanged(PUT_STARTED_EVENT);
       // the putObject call automatically closes the upload data
-      writeOperationHelper.putObject(putObjectRequest,
+      writeOperationHelper.putObject(finalizedRequest,
           builder.putOptions,
           uploadData,
           statistics);
@@ -1389,6 +1398,11 @@ public static final class BlockOutputStreamBuilder {
      */
     private boolean isMultipartUploadEnabled;
 
+    /**
+     * Is conditional create enabled.
+     */
+    private boolean isConditionalPutEnabled;
+
     private BlockOutputStreamBuilder() {
     }
 
@@ -1550,5 +1564,11 @@ public BlockOutputStreamBuilder withMultipartEnabled(
       isMultipartUploadEnabled = value;
       return this;
     }
+
+    public BlockOutputStreamBuilder withConditionalPutEnabled(
+            final boolean value){
+      isConditionalPutEnabled = value;
+      return this;
+    }
   }
 }

hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/S3AFileSystem.java

@@ -2194,8 +2194,9 @@ private FSDataOutputStream innerCreateFile(
     // put options are derived from the path and the
     // option builder.
     boolean keep = options.isPerformance() || keepDirectoryMarkers(path);
+    boolean conditionalCreate = options.isConditionalCreate();
     final PutObjectOptions putOptions =
-        new PutObjectOptions(keep, null, options.getHeaders());
+        new PutObjectOptions(keep, false, null, options.getHeaders());
 
     validateOutputStreamConfiguration(path, getConf());
 
@@ -2223,7 +2224,8 @@ private FSDataOutputStream innerCreateFile(
         .withPutOptions(putOptions)
         .withIOStatisticsAggregator(
             IOStatisticsContext.getCurrentIOStatisticsContext().getAggregator())
-        .withMultipartEnabled(isMultipartUploadEnabled);
+        .withMultipartEnabled(isMultipartUploadEnabled)
+        .withConditionalPutEnabled(conditionalCreate);
     return new FSDataOutputStream(
         new S3ABlockOutputStream(builder),
         null);

hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/WriteOperationHelper.java

@@ -320,8 +320,7 @@ private CompleteMultipartUploadResponse finalizeMultipartUpload(
           retrying,
           () -> {
             final CompleteMultipartUploadRequest.Builder requestBuilder =
-                getRequestFactory().newCompleteMultipartUploadRequestBuilder(
-                    destKey, uploadId, partETags);
+                getRequestFactory().newCompleteMultipartUploadRequestBuilder(destKey, uploadId, partETags, putOptions);
             return writeOperationHelperCallbacks.completeMultipartUpload(requestBuilder.build());
           });
       writeOperationHelperCallbacks.finishedWrite(destKey, length,

hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/api/RequestFactory.java

@@ -168,12 +168,14 @@ CreateMultipartUploadRequest.Builder newMultipartUploadRequestBuilder(
    * @param destKey destination object key
    * @param uploadId ID of initiated upload
    * @param partETags ordered list of etags
+   * @param putOptions options for the request
    * @return the request builder.
    */
   CompleteMultipartUploadRequest.Builder newCompleteMultipartUploadRequestBuilder(
       String destKey,
       String uploadId,
-      List<CompletedPart> partETags);
+      List<CompletedPart> partETags,
+      PutObjectOptions putOptions);
 
   /**
    * Create a HEAD object request builder.

hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/commit/magic/S3MagicCommitTracker.java

@@ -79,7 +79,7 @@ public boolean aboutToComplete(String uploadId,
     PutObjectRequest originalDestPut = getWriter().createPutObjectRequest(
         getOriginalDestKey(),
         0,
-        new PutObjectOptions(true, null, headers));
+        new PutObjectOptions(true,false, null, headers));
     upload(originalDestPut, EMPTY);
 
     // build the commit summary

hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/impl/AWSHeaders.java

@@ -38,6 +38,7 @@ public interface AWSHeaders {
   String DATE = "Date";
   String ETAG = "ETag";
   String LAST_MODIFIED = "Last-Modified";
+  String IF_NONE_MATCH = "If-None-Match";
 
   /*
    * Amazon HTTP Headers used by S3A.

hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/impl/CreateFileBuilder.java

@@ -63,19 +63,19 @@ public class CreateFileBuilder extends
    * Classic create file option set: overwriting.
    */
   public static final CreateFileOptions OPTIONS_CREATE_FILE_OVERWRITE =
-      new CreateFileOptions(CREATE_OVERWRITE_FLAGS, true, false, null);
+      new CreateFileOptions(CREATE_OVERWRITE_FLAGS, true, false, false, null);
 
   /**
    * Classic create file option set: no overwrite.
    */
   public static final CreateFileOptions OPTIONS_CREATE_FILE_NO_OVERWRITE =
-      new CreateFileOptions(CREATE_NO_OVERWRITE_FLAGS, true, false, null);
+      new CreateFileOptions(CREATE_NO_OVERWRITE_FLAGS, true, false, false, null);
 
   /**
    * Performance create options.
    */
   public static final CreateFileOptions OPTIONS_CREATE_FILE_PERFORMANCE =
-      new CreateFileOptions(CREATE_OVERWRITE_FLAGS, true, true, null);
+      new CreateFileOptions(CREATE_OVERWRITE_FLAGS, true, true, false, null);
 
   /**
    * Callback interface.
@@ -144,10 +144,12 @@ public FSDataOutputStream build() throws IOException {
 
     final boolean performance =
         options.getBoolean(Constants.FS_S3A_CREATE_PERFORMANCE, false);
+    final boolean conditionalCreate =
+            options.getBoolean(Constants.FS_S3A_CONDITIONAL_FILE_CREATE, false);
     return callbacks.createFileFromBuilder(
         path,
         getProgress(),
-        new CreateFileOptions(flags, isRecursive(), performance, headers));
+        new CreateFileOptions(flags, isRecursive(), performance, conditionalCreate, headers));
 
   }
 
@@ -218,6 +220,11 @@ public static final class CreateFileOptions {
      */
     private final boolean performance;
 
+    /**
+     * conditional flag.
+     */
+    private final boolean conditionalCreate;
+
     /**
      * Headers; may be null.
      */
@@ -227,16 +234,19 @@ public static final class CreateFileOptions {
      * @param flags creation flags
      * @param recursive create parent dirs?
      * @param performance performance flag
+     * @param conditionalCreate conditional flag
      * @param headers nullable header map.
      */
     public CreateFileOptions(
         final EnumSet<CreateFlag> flags,
         final boolean recursive,
         final boolean performance,
+        final boolean conditionalCreate,
         final Map<String, String> headers) {
       this.flags = flags;
       this.recursive = recursive;
       this.performance = performance;
+      this.conditionalCreate = conditionalCreate;
       this.headers = headers;
     }
 
@@ -246,6 +256,7 @@ public String toString() {
           "flags=" + flags +
           ", recursive=" + recursive +
           ", performance=" + performance +
+          ", conditionalCreate=" + conditionalCreate +
           ", headers=" + headers +
           '}';
     }
@@ -262,6 +273,10 @@ public boolean isPerformance() {
       return performance;
     }
 
+    public boolean isConditionalCreate() {
+      return conditionalCreate;
+    }
+
     public Map<String, String> getHeaders() {
       return headers;
     }

hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/impl/InternalConstants.java

@@ -40,6 +40,7 @@
 import static org.apache.hadoop.fs.s3a.Constants.DIRECTORY_OPERATIONS_PURGE_UPLOADS;
 import static org.apache.hadoop.fs.s3a.Constants.ENABLE_MULTI_DELETE;
 import static org.apache.hadoop.fs.s3a.Constants.FIPS_ENDPOINT;
+import static org.apache.hadoop.fs.s3a.Constants.FS_S3A_CONDITIONAL_FILE_CREATE;
 import static org.apache.hadoop.fs.s3a.Constants.FS_S3A_CREATE_PERFORMANCE;
 import static org.apache.hadoop.fs.s3a.Constants.FS_S3A_CREATE_PERFORMANCE_ENABLED;
 import static org.apache.hadoop.fs.s3a.Constants.STORE_CAPABILITY_AWS_V2;
@@ -260,7 +261,7 @@ private InternalConstants() {
    */
   public static final Set<String> CREATE_FILE_KEYS =
       Collections.unmodifiableSet(
-          new HashSet<>(Arrays.asList(FS_S3A_CREATE_PERFORMANCE)));
+          new HashSet<>(Arrays.asList(FS_S3A_CREATE_PERFORMANCE, FS_S3A_CONDITIONAL_FILE_CREATE)));
 
   /**
    * Dynamic Path capabilities to be evaluated

hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/impl/PutObjectOptions.java

@@ -31,6 +31,11 @@ public final class PutObjectOptions {
    */
   private final boolean keepMarkers;
 
+  /**
+   * Is this a conditional PUT operation
+   */
+  private final boolean conditionalPutEnabled;
+
   /**
    * Storage class, if not null.
    */
@@ -45,13 +50,16 @@ public final class PutObjectOptions {
    * Constructor.
    * @param keepMarkers Can the PUT operation skip marker deletion?
    * @param storageClass Storage class, if not null.
+   * @param conditionalPutEnabled Is this a conditional Put?
    * @param headers Headers; may be null.
    */
   public PutObjectOptions(
       final boolean keepMarkers,
+      final boolean conditionalPutEnabled,
       @Nullable final String storageClass,
       @Nullable final Map<String, String> headers) {
     this.keepMarkers = keepMarkers;
+    this.conditionalPutEnabled = conditionalPutEnabled;
     this.storageClass = storageClass;
     this.headers = headers;
   }
@@ -64,6 +72,14 @@ public boolean isKeepMarkers() {
     return keepMarkers;
   }
 
+  /**
+   * Get the conditional put flag.
+   * @return true if it's a conditional put
+   */
+  public boolean isconditionalPutEnabled() {
+    return conditionalPutEnabled;
+  }
+
   /**
    * Headers for the put/post request.
    * @return headers or null.
@@ -80,9 +96,9 @@ public String toString() {
         '}';
   }
 
-  private static final PutObjectOptions KEEP_DIRS = new PutObjectOptions(true,
+  private static final PutObjectOptions KEEP_DIRS = new PutObjectOptions(true, false,
       null, null);
-  private static final PutObjectOptions DELETE_DIRS = new PutObjectOptions(false,
+  private static final PutObjectOptions DELETE_DIRS = new PutObjectOptions(false, false,
       null, null);
 
   /**

hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/impl/RequestFactoryImpl.java

@@ -60,6 +60,7 @@
 import org.apache.hadoop.fs.s3a.auth.delegation.EncryptionSecrets;
 
 import static org.apache.commons.lang3.StringUtils.isNotEmpty;
+import static org.apache.hadoop.fs.s3a.impl.AWSHeaders.IF_NONE_MATCH;
 import static org.apache.hadoop.fs.s3a.Constants.DEFAULT_PART_UPLOAD_TIMEOUT;
 import static org.apache.hadoop.fs.s3a.S3AEncryptionMethods.UNKNOWN_ALGORITHM;
 import static org.apache.hadoop.fs.s3a.impl.AWSClientConfig.setRequestTimeout;
@@ -532,12 +533,20 @@ public CreateMultipartUploadRequest.Builder newMultipartUploadRequestBuilder(
   public CompleteMultipartUploadRequest.Builder newCompleteMultipartUploadRequestBuilder(
       String destKey,
       String uploadId,
-      List<CompletedPart> partETags) {
+      List<CompletedPart> partETags,
+      PutObjectOptions putOptions) {
+
     // a copy of the list is required, so that the AWS SDK doesn't
     // attempt to sort an unmodifiable list.
-    CompleteMultipartUploadRequest.Builder requestBuilder =
-        CompleteMultipartUploadRequest.builder().bucket(bucket).key(destKey).uploadId(uploadId)
+    CompleteMultipartUploadRequest.Builder requestBuilder;
+    Map<String, String> optionHeaders = putOptions.getHeaders();
+    requestBuilder = CompleteMultipartUploadRequest.builder().bucket(bucket).key(destKey).uploadId(uploadId)
             .multipartUpload(CompletedMultipartUpload.builder().parts(partETags).build());
+    if (putOptions.isconditionalPutEnabled()){
+      requestBuilder = CompleteMultipartUploadRequest.builder().overrideConfiguration(
+              override ->override.putHeader(IF_NONE_MATCH, optionHeaders.get(IF_NONE_MATCH)));
+
+    }
 
     return prepareRequest(requestBuilder);
   }