packages/core/src/execution-log-coverage.ts

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

export const EXECUTION_LOG_LEDGERS = ['runtime_event', 'runtime_event_projection'] as const;
export type ExecutionLogLedger = (typeof EXECUTION_LOG_LEDGERS)[number];

export interface ExecutionLogCursor {
  readonly ledger: ExecutionLogLedger;
  readonly streamId: string;
  readonly sequence: number;
  readonly eventId?: string;
}

/** Inclusive coverage of one ordered Runtime log or projection stream. */
export interface ExecutionLogCoverage {
  readonly highWater: ExecutionLogCursor;
  readonly lowWater?: ExecutionLogCursor;
  readonly eventCount?: number;
}