com.hazelcast.internal.journal.EventJournalInitialSubscriberState Maven / Gradle / Ivy
/*
* Copyright (c) 2008-2018, Hazelcast, Inc. All Rights Reserved.
*
* 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.
*/
package com.hazelcast.internal.journal;
import com.hazelcast.nio.ObjectDataInput;
import com.hazelcast.nio.ObjectDataOutput;
import com.hazelcast.nio.serialization.IdentifiedDataSerializable;
import java.io.IOException;
/**
* The response for the event journal subcription. This includes
* the sequence IDs of the newest and oldest event in the event
* journal from which new events can be read.
* Keep in mind that these sequence IDs may be overwritten at any point
* and may be stale by the time you decide to read them.
*
* @see com.hazelcast.map.impl.journal.MapEventJournalSubscribeOperation
* @see com.hazelcast.cache.impl.journal.CacheEventJournalSubscribeOperation
* @since 3.9
*/
public class EventJournalInitialSubscriberState implements IdentifiedDataSerializable {
private long oldestSequence;
private long newestSequence;
public EventJournalInitialSubscriberState() {
}
public EventJournalInitialSubscriberState(long oldestSequence, long newestSequence) {
this.oldestSequence = oldestSequence;
this.newestSequence = newestSequence;
}
public long getOldestSequence() {
return oldestSequence;
}
public long getNewestSequence() {
return newestSequence;
}
@Override
public int getFactoryId() {
return EventJournalDataSerializerHook.F_ID;
}
@Override
public int getId() {
return EventJournalDataSerializerHook.EVENT_JOURNAL_INITIAL_SUBSCRIBER_STATE;
}
@Override
public void writeData(ObjectDataOutput out) throws IOException {
out.writeLong(oldestSequence);
out.writeLong(newestSequence);
}
@Override
public void readData(ObjectDataInput in) throws IOException {
oldestSequence = in.readLong();
newestSequence = in.readLong();
}
}