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'Version 1.2.0 of the Amazon Kinesis Client Library'

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Kurtis Norwood 2014-10-21 13:07:04 -07:00
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# Amazon Kinesis Client Library for Java
The **Amazon Kinesis Client Library for Java** enables Java developers to easily consume and process data from [Amazon Kinesis][kinesis].
The **Amazon Kinesis Client Library for Java** (Amazon KCL) enables Java developers to easily consume and process data from [Amazon Kinesis][kinesis].
* [Kinesis Product Page][kinesis]
* [Forum][kinesis-forum]
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After you've downloaded the code from GitHub, you can build it using Maven. To disable GPG signing in the build, use this command: `mvn clean install -Dgpg.skip=true`
## KCL support for other languages
## Amazon KCL support for other languages
To make it easier for developers to write record processors in other languages, we have implemented a Java based daemon, called MultiLangDaemon that does all the heavy lifting. Our approach has the daemon spawn a sub-process, which in turn runs the record processor, which can be written in any language. The MultiLangDaemon process and the record processor sub-process communicate with each other over [STDIN and STDOUT using a defined protocol][multi-lang-protocol]. There will be a one to one correspondence amongst record processors, child processes, and shards. For Python developers specifically, we have abstracted these implementation details away and [expose an interface][kclpy] that enables you to focus on writing record processing logic in Python. This approach enables KCL to be language agnostic, while providing identical features and similar parallel processing model across all languages.
## Release Notes
### Release 1.2 (October 21, 2014)
* **Multi-Language Support** KCL now supports implementing record processors in any language by communicating with the daemon over [STDIN and STDOUT][multi-lang-protocol]. Python developers can directly use the [Amazon Kinesis Client Library for Python][kclpy] to write their data processing applications.
* **Multi-Language Support** Amazon KCL now supports implementing record processors in any language by communicating with the daemon over [STDIN and STDOUT][multi-lang-protocol]. Python developers can directly use the [Amazon Kinesis Client Library for Python][kclpy] to write their data processing applications.
### Release 1.1 (June 30, 2014)
* **Checkpointing at a specific sequence number** — The IRecordProcessorCheckpointer interface now supports checkpointing at a sequence number specified by the record processor.