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Implement block level fetch for Composite Directory
Signed-off-by: Shreyansh Ray <[email protected]>
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93 changes: 93 additions & 0 deletions
93
...rc/main/java/org/opensearch/index/store/remote/file/OnDemandCompositeBlockIndexInput.java
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,93 @@ | ||
| /* | ||
| * SPDX-License-Identifier: Apache-2.0 | ||
| * | ||
| * The OpenSearch Contributors require contributions made to | ||
| * this file be licensed under the Apache-2.0 license or a | ||
| * compatible open source license. | ||
| */ | ||
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| package org.opensearch.index.store.remote.file; | ||
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| import org.apache.lucene.store.FSDirectory; | ||
| import org.apache.lucene.store.IndexInput; | ||
| import org.opensearch.index.store.CompositeDirectoryRemoteStoreFileTrackerAdapter; | ||
| import org.opensearch.index.store.RemoteStoreFileTrackerAdapter; | ||
| import org.opensearch.index.store.remote.utils.BlobFetchRequest; | ||
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| import java.io.IOException; | ||
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| public class OnDemandCompositeBlockIndexInput extends OnDemandBlockIndexInput { | ||
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| private final RemoteStoreFileTrackerAdapter remoteStoreFileTrackerAdapter; | ||
| private final String fileName; | ||
| private final Long originalFileSize; | ||
| private final FSDirectory directory; | ||
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| public OnDemandCompositeBlockIndexInput(RemoteStoreFileTrackerAdapter remoteStoreFileTrackerAdapter, String fileName, FSDirectory directory) { | ||
| this( | ||
| OnDemandBlockIndexInput.builder(). | ||
| resourceDescription("OnDemandCompositeBlockIndexInput"). | ||
| isClone(false). | ||
| offset(0L). | ||
| length(getFileLength(remoteStoreFileTrackerAdapter, fileName)), | ||
| remoteStoreFileTrackerAdapter, | ||
| fileName, | ||
| directory); | ||
| } | ||
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| public OnDemandCompositeBlockIndexInput(Builder builder, RemoteStoreFileTrackerAdapter remoteStoreFileTrackerAdapter, String fileName, FSDirectory directory) { | ||
| super(builder); | ||
| this.remoteStoreFileTrackerAdapter = remoteStoreFileTrackerAdapter; | ||
| this.directory = null; | ||
| this.fileName = fileName; | ||
| originalFileSize = getFileLength(remoteStoreFileTrackerAdapter, fileName); | ||
| } | ||
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| @Override | ||
| protected OnDemandCompositeBlockIndexInput buildSlice(String sliceDescription, long offset, long length) { | ||
| return new OnDemandCompositeBlockIndexInput( | ||
| OnDemandBlockIndexInput.builder(). | ||
| blockSizeShift(blockSizeShift). | ||
| isClone(true). | ||
| offset(this.offset + offset). | ||
| length(length). | ||
| resourceDescription(sliceDescription), | ||
| remoteStoreFileTrackerAdapter, | ||
| fileName, | ||
| directory | ||
| ); | ||
| } | ||
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| @Override | ||
| protected IndexInput fetchBlock(int blockId) throws IOException { | ||
| final String uploadedFileName = ((CompositeDirectoryRemoteStoreFileTrackerAdapter)remoteStoreFileTrackerAdapter).getUploadedFileName(fileName); | ||
| final String blockFileName = uploadedFileName + "." + blockId; | ||
| final long blockStart = getBlockStart(blockId); | ||
| final long length = getActualBlockSize(blockId); | ||
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| BlobFetchRequest blobFetchRequest = BlobFetchRequest.builder() | ||
| .position(blockStart) | ||
| .length(length) | ||
| .blobName(uploadedFileName) | ||
| .directory(directory) | ||
| .fileName(blockFileName) | ||
| .build(); | ||
| return remoteStoreFileTrackerAdapter.fetchBlob(blobFetchRequest); | ||
| } | ||
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| @Override | ||
| public OnDemandBlockIndexInput clone() { | ||
| OnDemandCompositeBlockIndexInput clone = buildSlice("clone", 0L, this.length); | ||
| // ensures that clones may be positioned at the same point as the blocked file they were cloned from | ||
| clone.cloneBlock(this); | ||
| return clone; | ||
| } | ||
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| private long getActualBlockSize(int blockId) { | ||
| return (blockId != getBlock(originalFileSize - 1)) ? blockSize : getBlockOffset(originalFileSize - 1) + 1; | ||
| } | ||
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| private static long getFileLength(RemoteStoreFileTrackerAdapter remoteStoreFileTrackerAdapter, String fileName) { | ||
| return ((CompositeDirectoryRemoteStoreFileTrackerAdapter)remoteStoreFileTrackerAdapter).getFileLength(fileName); | ||
| } | ||
| } |