import com.amazonaws.services.s3.AmazonS3; //導(dǎo)入方法依賴的package包/類

/**

* Empties the contents of the given bucket and optionally deletes the bucket

*

* @param s3 The S3 client object to use

* @param bucketName The bucket to empty

* @param deleteBucket Flag to determine whether to delete the bucket after emptying

* @param context Lambda context object

*/

public static void emptyBucket(AmazonS3 s3, String bucketName, boolean deleteBucket, Context context)

{

if (s3.doesBucketExistV2(bucketName))

{

logDebug("Emptying bucket '" + bucketName + "'...", context);

VersionListing versionListing = s3.listVersions(new ListVersionsRequest().withBucketName(bucketName));

while (true)

{

for (S3VersionSummary vs : versionListing.getVersionSummaries())

{

s3.deleteVersion(bucketName, vs.getKey(), vs.getVersionId());

}

if (versionListing.isTruncated())

{

logDebug("Fetching next batch of versions for bucket '" + bucketName + "'", context);

versionListing = s3.listNextBatchOfVersions(versionListing);

}

else

{

break;

}

}

logInfo("Successfully emptied bucket '" + bucketName + "'", context);

if (deleteBucket)

{

logDebug("Deleting bucket '" + bucketName + "'...", context);

s3.deleteBucket(bucketName);

logInfo("Successfully deleted bucket '" + bucketName + "'", context);

}

}

else

{

logWarn("Bucket '" + bucketName + "' does not exist", context);

}

}

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