Package com.tnsai.llm.observability

Class InMemoryLLMPricingRegistry

java.lang.Object

com.tnsai.llm.observability.InMemoryLLMPricingRegistry

All Implemented Interfaces:

LLMPricingRegistry

public final class InMemoryLLMPricingRegistry
extends Object
implements LLMPricingRegistry

In-memory LLMPricingRegistry populated programmatically via InMemoryLLMPricingRegistry.Builder (issue #79). Default registry for tests and code-driven configuration; a JSON-backed registry shipping vendor rate cards for the 11 framework providers is a focused follow-up.

Rates are per-1K-tokens (the convention every major provider publishes); the registry handles the × usage / 1000 math so callers don't repeat it. Rounding: 6 decimal places via RoundingMode.HALF_UP — sub-fractional-cent precision is the minimum practical for sub-1K-token chats.

Since:

0.5.0 (issue #79)

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static final class	InMemoryLLMPricingRegistry.Builder

Method Summary

Modifier and Type	Method	Description
static InMemoryLLMPricingRegistry.Builder	builder(String tableVersion)
CostEstimate	estimate(String provider, String model, TokenUsage usage)	Compute a USD cost estimate for the given usage under the named provider + model.
String	tableVersion()	Stable version identifier of the pricing data — a date string, a content hash, whatever survives "what was the rate when this call was billed?"

Methods inherited from class java.lang.Object

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

Method Details

tableVersion

public String tableVersion()

Description copied from interface: LLMPricingRegistry

Stable version identifier of the pricing data — a date string, a content hash, whatever survives "what was the rate when this call was billed?" audits. Embedded in every CostEstimate the registry produces so downstream cost-aggregation can detect rate-table drift.

Specified by:

tableVersion in interface LLMPricingRegistry

estimate

public CostEstimate estimate(String provider,
 String model,
 TokenUsage usage)

Description copied from interface: LLMPricingRegistry

Compute a USD cost estimate for the given usage under the named provider + model. Implementations MUST return a non-null CostEstimate; if the pair is unknown, return a zero estimate stamped with LLMPricingRegistry.tableVersion() so the caller still sees provenance.

Specified by:

estimate in interface LLMPricingRegistry

builder

public static InMemoryLLMPricingRegistry.Builder builder(String tableVersion)