[Improve][SDK] Enhance Event Attribute Validation and Decoding Logic in SDK​​

[gosonzhang]

Description

In the current implementation, the absence of null checks for event attributes may result in NullPointerException during string construction via MapJoiner[1]. Additionally, similar robustness issues exist in the decoding logic[2].

To address these concerns, we propose the following improvements:
a. ​​Null-Safe Attribute Handling​​: implement comprehensive null checks for event attributes before processing.

b. ​​Robust Decoding Mechanism​​: Enhance decoding logic to gracefully handle malformed or unexpected data inputs
​​

1. https://github.com/apache/inlong/blob/master/inlong-sdk/dataproxy-sdk/src/main/java/org/apache/inlong/sdk/dataproxy/network/tcp/codec/EncodeObject.java#L94
   

2. https://github.com/apache/inlong/blob/master/inlong-sdk/dataproxy-sdk/src/main/java/org/apache/inlong/sdk/dataproxy/network/tcp/codec/DecodeObject.java#L90
   

InLong Component

InLong SDK

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