/**
 * Copyright 2017-2020 Plexus Interop Deutsche Bank AG
 * SPDX-License-Identifier: Apache-2.0
 *
 * Licensed 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.
 */
import { BlockingQueueBase, CancellationToken } from '@plexus-interop/common';
import { LogInvocationObserver } from './LogInvocationObserver';

export class BufferedInvocationObserver<T> extends LogInvocationObserver<T> {

    constructor(private cancellationToken?: CancellationToken, private buffer: BlockingQueueBase<T> = new BlockingQueueBase<T>()) {
        super();
    }

    public next(data: T): void {
        super.next(data);
        this.buffer.enqueue(data);
    }

    public pullData(): Promise<T> {
        return this.buffer.blockingDequeue(this.cancellationToken);
    }
}