software.amazon.awssdk.services.databasemigration.model

Class S3Settings

java.lang.Object

software.amazon.awssdk.services.databasemigration.model.S3Settings

All Implemented Interfaces:

Serializable, SdkPojo, ToCopyableBuilder<S3Settings.Builder,S3Settings>

@Generated(value="software.amazon.awssdk:codegen")
public final class S3Settings
extends Object
implements SdkPojo, Serializable, ToCopyableBuilder<S3Settings.Builder,S3Settings>

Settings for exporting data to Amazon S3.

See Also:

Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	S3Settings.Builder

Method Summary

Modifier and Type	Method and Description
String	bucketFolder() An optional parameter to set a folder name in the S3 bucket.
String	bucketName() The name of the S3 bucket.
static S3Settings.Builder	builder()
Boolean	cdcInsertsOnly() A value that enables a change data capture (CDC) load to write only INSERT operations to .csv or columnar storage (.parquet) output files.
CompressionTypeValue	compressionType() An optional parameter to use GZIP to compress the target files.
String	compressionTypeAsString() An optional parameter to use GZIP to compress the target files.
String	csvDelimiter() The delimiter used to separate columns in the source files.
String	csvRowDelimiter() The delimiter used to separate rows in the source files.
DataFormatValue	dataFormat() The format of the data that you want to use for output.
String	dataFormatAsString() The format of the data that you want to use for output.
Integer	dataPageSize() The size of one data page in bytes.
Integer	dictPageSizeLimit() The maximum size of an encoded dictionary page of a column.
Boolean	enableStatistics() A value that enables statistics for Parquet pages and row groups.
EncodingTypeValue	encodingType() The type of encoding you are using:
String	encodingTypeAsString() The type of encoding you are using:
EncryptionModeValue	encryptionMode() The type of server-side encryption that you want to use for your data.
String	encryptionModeAsString() The type of server-side encryption that you want to use for your data.
boolean	equals(Object obj)
boolean	equalsBySdkFields(Object obj)
String	externalTableDefinition() The external table definition.
<T> Optional<T>	getValueForField(String fieldName, Class<T> clazz)
int	hashCode()
Boolean	includeOpForFullLoad() A value that enables a full load to write INSERT operations to the comma-separated value (.csv) output files only to indicate how the rows were added to the source database.
Boolean	parquetTimestampInMillisecond() A value that specifies the precision of any TIMESTAMP column values that are written to an Amazon S3 object file in .parquet format.
ParquetVersionValue	parquetVersion() The version of the Apache Parquet format that you want to use: parquet_1_0 (the default) or parquet_2_0.
String	parquetVersionAsString() The version of the Apache Parquet format that you want to use: parquet_1_0 (the default) or parquet_2_0.
Integer	rowGroupLength() The number of rows in a row group.
List<SdkField<?>>	sdkFields()
static Class<? extends S3Settings.Builder>	serializableBuilderClass()
String	serverSideEncryptionKmsKeyId() If you are using SSE_KMS for the EncryptionMode, provide the AWS KMS key ID.
String	serviceAccessRoleArn() The Amazon Resource Name (ARN) used by the service access IAM role.
String	timestampColumnName() A value that when nonblank causes AWS DMS to add a column with timestamp information to the endpoint data for an Amazon S3 target.
S3Settings.Builder	toBuilder()
String	toString() Returns a string representation of this object.

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface software.amazon.awssdk.utils.builder.ToCopyableBuilder

copy

Method Detail

serviceAccessRoleArn

public String serviceAccessRoleArn()

The Amazon Resource Name (ARN) used by the service access IAM role.

Returns:

The Amazon Resource Name (ARN) used by the service access IAM role.

externalTableDefinition

public String externalTableDefinition()

The external table definition.

Returns:

The external table definition.

csvRowDelimiter

public String csvRowDelimiter()

The delimiter used to separate rows in the source files. The default is a carriage return (\n).

Returns:

The delimiter used to separate rows in the source files. The default is a carriage return ( \n).

csvDelimiter

public String csvDelimiter()

The delimiter used to separate columns in the source files. The default is a comma.

Returns:

The delimiter used to separate columns in the source files. The default is a comma.

bucketFolder

public String bucketFolder()

An optional parameter to set a folder name in the S3 bucket. If provided, tables are created in the path bucketFolder/schema_name/table_name/. If this parameter is not specified, then the path used is schema_name/table_name/.

Returns:

An optional parameter to set a folder name in the S3 bucket. If provided, tables are created in the path bucketFolder/schema_name/table_name/. If this parameter is not specified, then the path used is schema_name/table_name/.

bucketName

public String bucketName()

The name of the S3 bucket.

Returns:

The name of the S3 bucket.

compressionType

public CompressionTypeValue compressionType()

An optional parameter to use GZIP to compress the target files. Set to GZIP to compress the target files. Set to NONE (the default) or do not use to leave the files uncompressed. Applies to both .csv and .parquet file formats.

If the service returns an enum value that is not available in the current SDK version, compressionType will return CompressionTypeValue.UNKNOWN_TO_SDK_VERSION. The raw value returned by the service is available from compressionTypeAsString().

Returns:

An optional parameter to use GZIP to compress the target files. Set to GZIP to compress the target files. Set to NONE (the default) or do not use to leave the files uncompressed. Applies to both .csv and .parquet file formats.

See Also:

CompressionTypeValue

compressionTypeAsString

public String compressionTypeAsString()

An optional parameter to use GZIP to compress the target files. Set to GZIP to compress the target files. Set to NONE (the default) or do not use to leave the files uncompressed. Applies to both .csv and .parquet file formats.

If the service returns an enum value that is not available in the current SDK version, compressionType will return CompressionTypeValue.UNKNOWN_TO_SDK_VERSION. The raw value returned by the service is available from compressionTypeAsString().

Returns:

An optional parameter to use GZIP to compress the target files. Set to GZIP to compress the target files. Set to NONE (the default) or do not use to leave the files uncompressed. Applies to both .csv and .parquet file formats.

See Also:

CompressionTypeValue

encryptionMode

public EncryptionModeValue encryptionMode()

The type of server-side encryption that you want to use for your data. This encryption type is part of the endpoint settings or the extra connections attributes for Amazon S3. You can choose either SSE_S3 (the default) or SSE_KMS. To use SSE_S3, you need an AWS Identity and Access Management (IAM) role with permission to allow "arn:aws:s3:::dms-*" to use the following actions:

• s3:CreateBucket

• s3:ListBucket

• s3:DeleteBucket

• s3:GetBucketLocation

• s3:GetObject

• s3:PutObject

• s3:DeleteObject

• s3:GetObjectVersion

• s3:GetBucketPolicy

• s3:PutBucketPolicy

• s3:DeleteBucketPolicy

If the service returns an enum value that is not available in the current SDK version, encryptionMode will return EncryptionModeValue.UNKNOWN_TO_SDK_VERSION. The raw value returned by the service is available from encryptionModeAsString().

Returns:

The type of server-side encryption that you want to use for your data. This encryption type is part of the endpoint settings or the extra connections attributes for Amazon S3. You can choose either SSE_S3 (the default) or SSE_KMS. To use SSE_S3, you need an AWS Identity and Access Management (IAM) role with permission to allow "arn:aws:s3:::dms-*" to use the following actions:

• s3:CreateBucket

• s3:ListBucket

• s3:DeleteBucket

• s3:GetBucketLocation

• s3:GetObject

• s3:PutObject

• s3:DeleteObject

• s3:GetObjectVersion

• s3:GetBucketPolicy

• s3:PutBucketPolicy

• s3:DeleteBucketPolicy

See Also:

EncryptionModeValue

encryptionModeAsString

public String encryptionModeAsString()

The type of server-side encryption that you want to use for your data. This encryption type is part of the endpoint settings or the extra connections attributes for Amazon S3. You can choose either SSE_S3 (the default) or SSE_KMS. To use SSE_S3, you need an AWS Identity and Access Management (IAM) role with permission to allow "arn:aws:s3:::dms-*" to use the following actions:

• s3:CreateBucket

• s3:ListBucket

• s3:DeleteBucket

• s3:GetBucketLocation

• s3:GetObject

• s3:PutObject

• s3:DeleteObject

• s3:GetObjectVersion

• s3:GetBucketPolicy

• s3:PutBucketPolicy

• s3:DeleteBucketPolicy

If the service returns an enum value that is not available in the current SDK version, encryptionMode will return EncryptionModeValue.UNKNOWN_TO_SDK_VERSION. The raw value returned by the service is available from encryptionModeAsString().

Returns:

The type of server-side encryption that you want to use for your data. This encryption type is part of the endpoint settings or the extra connections attributes for Amazon S3. You can choose either SSE_S3 (the default) or SSE_KMS. To use SSE_S3, you need an AWS Identity and Access Management (IAM) role with permission to allow "arn:aws:s3:::dms-*" to use the following actions:

• s3:CreateBucket

• s3:ListBucket

• s3:DeleteBucket

• s3:GetBucketLocation

• s3:GetObject

• s3:PutObject

• s3:DeleteObject

• s3:GetObjectVersion

• s3:GetBucketPolicy

• s3:PutBucketPolicy

• s3:DeleteBucketPolicy

See Also:

EncryptionModeValue

serverSideEncryptionKmsKeyId

public String serverSideEncryptionKmsKeyId()

If you are using SSE_KMS for the EncryptionMode, provide the AWS KMS key ID. The key that you use needs an attached policy that enables AWS Identity and Access Management (IAM) user permissions and allows use of the key.

Here is a CLI example: aws dms create-endpoint --endpoint-identifier value --endpoint-type target --engine-name s3 --s3-settings ServiceAccessRoleArn=value,BucketFolder=value,BucketName=value,EncryptionMode=SSE_KMS,ServerSideEncryptionKmsKeyId=value

Returns:

If you are using SSE_KMS for the EncryptionMode, provide the AWS KMS key ID. The key that you use needs an attached policy that enables AWS Identity and Access Management (IAM) user permissions and allows use of the key.

Here is a CLI example: aws dms create-endpoint --endpoint-identifier value --endpoint-type target --engine-name s3 --s3-settings ServiceAccessRoleArn=value,BucketFolder=value,BucketName=value,EncryptionMode=SSE_KMS,ServerSideEncryptionKmsKeyId=value

dataFormat

public DataFormatValue dataFormat()

The format of the data that you want to use for output. You can choose one of the following:

• csv : This is a row-based file format with comma-separated values (.csv).

• parquet : Apache Parquet (.parquet) is a columnar storage file format that features efficient compression and provides faster query response.

If the service returns an enum value that is not available in the current SDK version, dataFormat will return DataFormatValue.UNKNOWN_TO_SDK_VERSION. The raw value returned by the service is available from dataFormatAsString().

Returns:

The format of the data that you want to use for output. You can choose one of the following:

• csv : This is a row-based file format with comma-separated values (.csv).

• parquet : Apache Parquet (.parquet) is a columnar storage file format that features efficient compression and provides faster query response.

See Also:

DataFormatValue

dataFormatAsString

public String dataFormatAsString()

The format of the data that you want to use for output. You can choose one of the following:

• csv : This is a row-based file format with comma-separated values (.csv).

• parquet : Apache Parquet (.parquet) is a columnar storage file format that features efficient compression and provides faster query response.

If the service returns an enum value that is not available in the current SDK version, dataFormat will return DataFormatValue.UNKNOWN_TO_SDK_VERSION. The raw value returned by the service is available from dataFormatAsString().

Returns:

The format of the data that you want to use for output. You can choose one of the following:

• csv : This is a row-based file format with comma-separated values (.csv).

• parquet : Apache Parquet (.parquet) is a columnar storage file format that features efficient compression and provides faster query response.

See Also:

DataFormatValue

encodingType

public EncodingTypeValue encodingType()

The type of encoding you are using:

• RLE_DICTIONARY uses a combination of bit-packing and run-length encoding to store repeated values more efficiently. This is the default.

• PLAIN doesn't use encoding at all. Values are stored as they are.

• PLAIN_DICTIONARY builds a dictionary of the values encountered in a given column. The dictionary is stored in a dictionary page for each column chunk.

If the service returns an enum value that is not available in the current SDK version, encodingType will return EncodingTypeValue.UNKNOWN_TO_SDK_VERSION. The raw value returned by the service is available from encodingTypeAsString().

Returns:

The type of encoding you are using:

• RLE_DICTIONARY uses a combination of bit-packing and run-length encoding to store repeated values more efficiently. This is the default.

• PLAIN doesn't use encoding at all. Values are stored as they are.

• PLAIN_DICTIONARY builds a dictionary of the values encountered in a given column. The dictionary is stored in a dictionary page for each column chunk.

See Also:

EncodingTypeValue

encodingTypeAsString

public String encodingTypeAsString()

The type of encoding you are using:

• RLE_DICTIONARY uses a combination of bit-packing and run-length encoding to store repeated values more efficiently. This is the default.

• PLAIN doesn't use encoding at all. Values are stored as they are.

• PLAIN_DICTIONARY builds a dictionary of the values encountered in a given column. The dictionary is stored in a dictionary page for each column chunk.

If the service returns an enum value that is not available in the current SDK version, encodingType will return EncodingTypeValue.UNKNOWN_TO_SDK_VERSION. The raw value returned by the service is available from encodingTypeAsString().

Returns:

The type of encoding you are using:

• RLE_DICTIONARY uses a combination of bit-packing and run-length encoding to store repeated values more efficiently. This is the default.

• PLAIN doesn't use encoding at all. Values are stored as they are.

• PLAIN_DICTIONARY builds a dictionary of the values encountered in a given column. The dictionary is stored in a dictionary page for each column chunk.

See Also:

EncodingTypeValue

dictPageSizeLimit

public Integer dictPageSizeLimit()

The maximum size of an encoded dictionary page of a column. If the dictionary page exceeds this, this column is stored using an encoding type of PLAIN. This parameter defaults to 1024 * 1024 bytes (1 MiB), the maximum size of a dictionary page before it reverts to PLAIN encoding. This size is used for .parquet file format only.

Returns:

The maximum size of an encoded dictionary page of a column. If the dictionary page exceeds this, this column is stored using an encoding type of PLAIN. This parameter defaults to 1024 * 1024 bytes (1 MiB), the maximum size of a dictionary page before it reverts to PLAIN encoding. This size is used for .parquet file format only.

rowGroupLength

public Integer rowGroupLength()

The number of rows in a row group. A smaller row group size provides faster reads. But as the number of row groups grows, the slower writes become. This parameter defaults to 10,000 rows. This number is used for .parquet file format only.

If you choose a value larger than the maximum, RowGroupLength is set to the max row group length in bytes (64 * 1024 * 1024).

Returns:

The number of rows in a row group. A smaller row group size provides faster reads. But as the number of row groups grows, the slower writes become. This parameter defaults to 10,000 rows. This number is used for .parquet file format only.

If you choose a value larger than the maximum, RowGroupLength is set to the max row group length in bytes (64 * 1024 * 1024).

dataPageSize

public Integer dataPageSize()

The size of one data page in bytes. This parameter defaults to 1024 * 1024 bytes (1 MiB). This number is used for .parquet file format only.

Returns:

The size of one data page in bytes. This parameter defaults to 1024 * 1024 bytes (1 MiB). This number is used for .parquet file format only.

parquetVersion

public ParquetVersionValue parquetVersion()

The version of the Apache Parquet format that you want to use: parquet_1_0 (the default) or parquet_2_0.

If the service returns an enum value that is not available in the current SDK version, parquetVersion will return ParquetVersionValue.UNKNOWN_TO_SDK_VERSION. The raw value returned by the service is available from parquetVersionAsString().

Returns:

The version of the Apache Parquet format that you want to use: parquet_1_0 (the default) or parquet_2_0.

See Also:

ParquetVersionValue

parquetVersionAsString

public String parquetVersionAsString()

The version of the Apache Parquet format that you want to use: parquet_1_0 (the default) or parquet_2_0.

If the service returns an enum value that is not available in the current SDK version, parquetVersion will return ParquetVersionValue.UNKNOWN_TO_SDK_VERSION. The raw value returned by the service is available from parquetVersionAsString().

Returns:

The version of the Apache Parquet format that you want to use: parquet_1_0 (the default) or parquet_2_0.

See Also:

ParquetVersionValue

enableStatistics

public Boolean enableStatistics()

A value that enables statistics for Parquet pages and row groups. Choose true to enable statistics, false to disable. Statistics include NULL, DISTINCT, MAX, and MIN values. This parameter defaults to true. This value is used for .parquet file format only.

Returns:

A value that enables statistics for Parquet pages and row groups. Choose true to enable statistics, false to disable. Statistics include NULL, DISTINCT, MAX, and MIN values. This parameter defaults to true. This value is used for .parquet file format only.

includeOpForFullLoad

public Boolean includeOpForFullLoad()

A value that enables a full load to write INSERT operations to the comma-separated value (.csv) output files only to indicate how the rows were added to the source database.

AWS DMS supports the IncludeOpForFullLoad parameter in versions 3.1.4 and later.

For full load, records can only be inserted. By default (the false setting), no information is recorded in these output files for a full load to indicate that the rows were inserted at the source database. If IncludeOpForFullLoad is set to true or y, the INSERT is recorded as an I annotation in the first field of the .csv file. This allows the format of your target records from a full load to be consistent with the target records from a CDC load.

This setting works together with the CdcInsertsOnly parameter for output to .csv files only. For more information about how these settings work together, see Indicating Source DB Operations in Migrated S3 Data in the AWS Database Migration Service User Guide..

Returns:

A value that enables a full load to write INSERT operations to the comma-separated value (.csv) output files only to indicate how the rows were added to the source database.

AWS DMS supports the IncludeOpForFullLoad parameter in versions 3.1.4 and later.

For full load, records can only be inserted. By default (the false setting), no information is recorded in these output files for a full load to indicate that the rows were inserted at the source database. If IncludeOpForFullLoad is set to true or y, the INSERT is recorded as an I annotation in the first field of the .csv file. This allows the format of your target records from a full load to be consistent with the target records from a CDC load.

This setting works together with the CdcInsertsOnly parameter for output to .csv files only. For more information about how these settings work together, see Indicating Source DB Operations in Migrated S3 Data in the AWS Database Migration Service User Guide..

cdcInsertsOnly

public Boolean cdcInsertsOnly()

A value that enables a change data capture (CDC) load to write only INSERT operations to .csv or columnar storage (.parquet) output files. By default (the false setting), the first field in a .csv or .parquet record contains the letter I (INSERT), U (UPDATE), or D (DELETE). These values indicate whether the row was inserted, updated, or deleted at the source database for a CDC load to the target.

If CdcInsertsOnly is set to true or y, only INSERTs from the source database are migrated to the .csv or .parquet file. For .csv format only, how these INSERTs are recorded depends on the value of IncludeOpForFullLoad. If IncludeOpForFullLoad is set to true, the first field of every CDC record is set to I to indicate the INSERT operation at the source. If IncludeOpForFullLoad is set to false, every CDC record is written without a first field to indicate the INSERT operation at the source. For more information about how these settings work together, see Indicating Source DB Operations in Migrated S3 Data in the AWS Database Migration Service User Guide..

AWS DMS supports this interaction between the CdcInsertsOnly and IncludeOpForFullLoad parameters in versions 3.1.4 and later.

Returns:

A value that enables a change data capture (CDC) load to write only INSERT operations to .csv or columnar storage (.parquet) output files. By default (the false setting), the first field in a .csv or .parquet record contains the letter I (INSERT), U (UPDATE), or D (DELETE). These values indicate whether the row was inserted, updated, or deleted at the source database for a CDC load to the target.

If CdcInsertsOnly is set to true or y, only INSERTs from the source database are migrated to the .csv or .parquet file. For .csv format only, how these INSERTs are recorded depends on the value of IncludeOpForFullLoad. If IncludeOpForFullLoad is set to true, the first field of every CDC record is set to I to indicate the INSERT operation at the source. If IncludeOpForFullLoad is set to false, every CDC record is written without a first field to indicate the INSERT operation at the source. For more information about how these settings work together, see Indicating Source DB Operations in Migrated S3 Data in the AWS Database Migration Service User Guide..

AWS DMS supports this interaction between the CdcInsertsOnly and IncludeOpForFullLoad parameters in versions 3.1.4 and later.

timestampColumnName

public String timestampColumnName()

A value that when nonblank causes AWS DMS to add a column with timestamp information to the endpoint data for an Amazon S3 target.

AWS DMS supports the TimestampColumnName parameter in versions 3.1.4 and later.

DMS includes an additional STRING column in the .csv or .parquet object files of your migrated data when you set TimestampColumnName to a nonblank value.

For a full load, each row of this timestamp column contains a timestamp for when the data was transferred from the source to the target by DMS.

For a change data capture (CDC) load, each row of the timestamp column contains the timestamp for the commit of that row in the source database.

The string format for this timestamp column value is yyyy-MM-dd HH:mm:ss.SSSSSS. By default, the precision of this value is in microseconds. For a CDC load, the rounding of the precision depends on the commit timestamp supported by DMS for the source database.

When the AddColumnName parameter is set to true, DMS also includes a name for the timestamp column that you set with TimestampColumnName.

Returns:

A value that when nonblank causes AWS DMS to add a column with timestamp information to the endpoint data for an Amazon S3 target.

AWS DMS supports the TimestampColumnName parameter in versions 3.1.4 and later.

DMS includes an additional STRING column in the .csv or .parquet object files of your migrated data when you set TimestampColumnName to a nonblank value.

For a full load, each row of this timestamp column contains a timestamp for when the data was transferred from the source to the target by DMS.

For a change data capture (CDC) load, each row of the timestamp column contains the timestamp for the commit of that row in the source database.

The string format for this timestamp column value is yyyy-MM-dd HH:mm:ss.SSSSSS. By default, the precision of this value is in microseconds. For a CDC load, the rounding of the precision depends on the commit timestamp supported by DMS for the source database.

When the AddColumnName parameter is set to true, DMS also includes a name for the timestamp column that you set with TimestampColumnName.

parquetTimestampInMillisecond

public Boolean parquetTimestampInMillisecond()

A value that specifies the precision of any TIMESTAMP column values that are written to an Amazon S3 object file in .parquet format.

AWS DMS supports the ParquetTimestampInMillisecond parameter in versions 3.1.4 and later.

When ParquetTimestampInMillisecond is set to true or y, AWS DMS writes all TIMESTAMP columns in a .parquet formatted file with millisecond precision. Otherwise, DMS writes them with microsecond precision.

Currently, Amazon Athena and AWS Glue can handle only millisecond precision for TIMESTAMP values. Set this parameter to true for S3 endpoint object files that are .parquet formatted only if you plan to query or process the data with Athena or AWS Glue.

AWS DMS writes any TIMESTAMP column values written to an S3 file in .csv format with microsecond precision.

Setting ParquetTimestampInMillisecond has no effect on the string format of the timestamp column value that is inserted by setting the TimestampColumnName parameter.

Returns:

A value that specifies the precision of any TIMESTAMP column values that are written to an Amazon S3 object file in .parquet format.

AWS DMS supports the ParquetTimestampInMillisecond parameter in versions 3.1.4 and later.

When ParquetTimestampInMillisecond is set to true or y, AWS DMS writes all TIMESTAMP columns in a .parquet formatted file with millisecond precision. Otherwise, DMS writes them with microsecond precision.

Currently, Amazon Athena and AWS Glue can handle only millisecond precision for TIMESTAMP values. Set this parameter to true for S3 endpoint object files that are .parquet formatted only if you plan to query or process the data with Athena or AWS Glue.

AWS DMS writes any TIMESTAMP column values written to an S3 file in .csv format with microsecond precision.

Setting ParquetTimestampInMillisecond has no effect on the string format of the timestamp column value that is inserted by setting the TimestampColumnName parameter.

toBuilder

public S3Settings.Builder toBuilder()

Specified by:

toBuilder in interface ToCopyableBuilder<S3Settings.Builder,S3Settings>

builder

public static S3Settings.Builder builder()

serializableBuilderClass

public static Class<? extends S3Settings.Builder> serializableBuilderClass()

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

equalsBySdkFields

public boolean equalsBySdkFields(Object obj)

Specified by:

equalsBySdkFields in interface SdkPojo

toString

public String toString()

Returns a string representation of this object. This is useful for testing and debugging. Sensitive data will be redacted from this string using a placeholder value.

Overrides:

toString in class Object

getValueForField

public <T> Optional<T> getValueForField(String fieldName,
                                        Class<T> clazz)

sdkFields

public List<SdkField<?>> sdkFields()

Specified by:

sdkFields in interface SdkPojo