org.graylog2.shared.journal.Journal Maven / Gradle / Ivy
/**
* This file is part of Graylog.
*
* Graylog is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Graylog 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 for more details.
*
* You should have received a copy of the GNU General Public License
* along with Graylog. If not, see .
*/
package org.graylog2.shared.journal;
import java.util.List;
public interface Journal {
Entry createEntry(byte[] idBytes, byte[] messageBytes);
long write(List entries);
long write(byte[] idBytes, byte[] messageBytes);
List read(long maximumCount);
void markJournalOffsetCommitted(long offset);
class Entry {
private final byte[] idBytes;
private final byte[] messageBytes;
public Entry(byte[] idBytes, byte[] messageBytes) {
this.idBytes = idBytes;
this.messageBytes = messageBytes;
}
public byte[] getIdBytes() {
return idBytes;
}
public byte[] getMessageBytes() {
return messageBytes;
}
}
class JournalReadEntry {
private final byte[] payload;
private final long offset;
public JournalReadEntry(byte[] payload, long offset) {
this.payload = payload;
this.offset = offset;
}
public long getOffset() {
return offset;
}
public byte[] getPayload() {
return payload;
}
}
}