HttpHeadersCustomizer (snowflake-jdbc 3.26.1 API)

```
public interface HttpHeadersCustomizer
```
Allows programmatic customization of HTTP headers for requests sent by the Snowflake JDBC driver.
Implementations can be registered with the driver (e.g., via SnowflakeBasicDataSource) to dynamically add headers. They define which requests to apply headers to, provide the headers, and specify if headers should regenerate on retries (e.g., for dynamic tokens).

Field Summary

Fields
Modifier and Type Field Description

static String HTTP_HEADER_CUSTOMIZERS_PROPERTY_KEY

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`boolean`	`applies(String method, String uri, Map<String,List<String>> currentHeaders)`	Determines if this customizer should be applied to the given request context.
`boolean`	`invokeOnce()`	Indicates if newHeaders() should be called only once for the initial request attempt (true), or if it should be called again before each retry attempt (false).
`Map<String,List<String>>`	`newHeaders()`	Generates the custom headers to be added to the request.

- Field Detail
  - HTTP_HEADER_CUSTOMIZERS_PROPERTY_KEY
```
static final String HTTP_HEADER_CUSTOMIZERS_PROPERTY_KEY
```
    See Also:
    
    Constant Field Values
- Method Detail
  - applies
```
boolean applies(String method,
                String uri,
                Map<String,List<String>> currentHeaders)
```
    Determines if this customizer should be applied to the given request context.
    
    Parameters:
    
    method - The HTTP method (e.g., "GET", "POST").
    
    uri - The target URI for the request.
    
    currentHeaders - A read-only view of headers already present before this customizer runs.
    
    Returns:
    
    true if newHeaders() should be called for this request, false otherwise.
  - newHeaders
```
Map<String,List<String>> newHeaders()
```
    Generates the custom headers to be added to the request.
    
    Returns:
    
    A Map where keys are header names and values are Lists of header values.
  - invokeOnce
```
boolean invokeOnce()
```
    Indicates if newHeaders() should be called only once for the initial request attempt (true), or if it should be called again before each retry attempt (false).
    
    Returns:
    
    true for static headers, false for dynamic headers needing regeneration.