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## 8 Chaining

This topic provides the information about chaining of the transformation.

The end-user can define the sequence of transformations for each routing in which the request needs to be processed.

Chaining can be achieved by using the snapshot list. The snapshot list stores the response body and response headers whenever the transformation is processed. Therefore, the end-user can access the response body or headers of all processed transformations at any stage.

Syntax: $snapshot.get(index).body or $snapshot.get(index).headers

Note:

$body and $headers refers to the response body and headers of previous step.

Figure 8-1 Chaining

Table 8-1 Snapshot List

Index | Body | Headers
--- | --- | ---
1 | Request Body | Request Headers
2 | T1 Response Body | T1 Response Headers
3 | T2 Response Body | T2 Response Headers
4 | T3 Response Body | T3 Response Headers
… | ... | ...
N | T(N-1) Response Body | T(N-1) Response Headers