[core] Rewrite oss tryToWriteAtomic using atomic putObject API (#8226)#8228
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…of the OSS SDK (apache#8226) Paimon's existing OSSFileIO inherits from HadoopCompliantFileIO, with file operations implemented underneath via Hadoop's AliyunOSSFileSystem. In object storage scenarios, the default implementation of tryToWriteAtomic follows the pattern of 'writing a temporary file followed by renaming'. However, renaming on OSS is essentially a copy-then-delete process and not an atomic operation. Rewrite the implementation of tryToWriteAtomic, and directly call the conditional write API (put-if-absent) of the OSS SDK, so as to implement the atomic 'write if not exists' semantics without relying on external locks.
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Paimon's existing OSSFileIO inherits from HadoopCompliantFileIO, with file operations implemented underneath via Hadoop's AliyunOSSFileSystem. In object storage scenarios, the default implementation of tryToWriteAtomic follows the pattern of 'writing a temporary file followed by renaming'. However, renaming on OSS is essentially a copy-then-delete process and not an atomic operation.
Rewrite the implementation of tryToWriteAtomic, and directly call the conditional write API (put-if-absent) of the OSS SDK, so as to implement the atomic 'write if not exists' semantics without relying on external locks.
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