/*
 * Copyright (c) 2016, 2020, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

package jdk.jfr.internal.management;

import java.io.Closeable;

import java.io.IOException;
import java.io.InputStream;
import java.util.concurrent.atomic.AtomicLong;

import jdk.jfr.Recording;
import jdk.jfr.internal.consumer.FinishedStream;
import jdk.jfr.internal.consumer.OngoingStream;

// abstract class that hides if a recording is ongoing or finished.
public abstract class EventByteStream implements Closeable {
    public static final String NAME = "Remote Recording Stream";
    private static AtomicLong idCounter = new AtomicLong();

    private final long identifier;
    private volatile long time;

    public EventByteStream() {
        this.identifier = idCounter.incrementAndGet();
    }

    public static EventByteStream newOngoingStream(Recording recording, int blockSize, long  startTimeNanos,long endTimeNanos) {
        return new OngoingStream(recording, blockSize, startTimeNanos, endTimeNanos);
    }

    public static EventByteStream newFinishedStream(InputStream is, int blockSize) {
        return new FinishedStream(is, blockSize);
    }

    final protected void touch() {
        time = System.currentTimeMillis();
    }

    final public long getLastTouched() {
        return time;
    }

    abstract public byte[] read() throws IOException;

    final public long getId() {
        return identifier;
    }
}