Package org.mockserver.mock.action.http

Class StreamTemplateRenderer

java.lang.Object

org.mockserver.mock.action.http.StreamTemplateRenderer

public class StreamTemplateRenderer
extends Object

Shared renderer that templates a single streaming payload (an SSE event's data, a WebSocket text frame, or a gRPC server-stream message) against the triggering request, reusing exactly the same template engines and request/template context (request.*, jsonPath, the built-in helpers, faker and scenario) that HttpResponseTemplateActionHandler uses.

Opt-in, static-preserving: render(HttpTemplate.TemplateType, String, HttpRequest) returns the payload unchanged when templateType is null (the default) — non-templated streaming responses are byte-for-byte unchanged. Templating is applied only when a templateType is explicitly set on the streaming action, and the payload is rendered once per event/message.

Engines: Velocity and Mustache render the payload text directly. JavaScript executes the template's handle(request) function and coerces its return value to text (TemplateEngine.renderTemplateText(String, HttpRequest)); if the GraalJS engine is not on the classpath, a JAVASCRIPT templateType fails loudly with the same clear error the response-template path uses rather than silently degrading. Engines are created lazily and cached per renderer instance, mirroring HttpResponseTemplateActionHandler's lazy engine caching.

Constructor Summary

Constructors

Constructor	Description
StreamTemplateRenderer(MockServerLogger mockServerLogger, Configuration configuration)

Method Summary

Modifier and Type	Method	Description
String	render(HttpTemplate.TemplateType templateType, String payload, HttpRequest request)	Renders payload as a response template of the given templateType against request.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

StreamTemplateRenderer

public StreamTemplateRenderer(MockServerLogger mockServerLogger,
 Configuration configuration)

Method Details

render

public String render(HttpTemplate.TemplateType templateType,
 String payload,
 HttpRequest request)

Renders payload as a response template of the given templateType against request. When templateType or payload is null, the payload is returned unchanged (static — no engine is created).