org.apache.activemq.artemis.core.protocol.core.impl.wireformat.ReplicationStartSyncMessage Maven / Gradle / Ivy
/*
* 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.
*/
package org.apache.activemq.artemis.core.protocol.core.impl.wireformat;
import java.security.InvalidParameterException;
import java.util.Arrays;
import java.util.List;
import org.apache.activemq.artemis.api.core.ActiveMQBuffer;
import org.apache.activemq.artemis.core.journal.impl.JournalFile;
import org.apache.activemq.artemis.core.persistence.impl.journal.AbstractJournalStorageManager;
import org.apache.activemq.artemis.core.protocol.core.impl.PacketImpl;
import org.apache.activemq.artemis.utils.DataConstants;
/**
* This message may signal start or end of the replication synchronization.
*
* At start, it sends all fileIDs used in a given journal live server to the backup, so the backup
* can reserve those IDs.
*/
public class ReplicationStartSyncMessage extends PacketImpl {
private long[] ids;
private SyncDataType dataType;
private boolean synchronizationIsFinished;
private String nodeID;
private boolean allowsAutoFailBack;
public enum SyncDataType {
JournalBindings(AbstractJournalStorageManager.JournalContent.BINDINGS.typeByte),
JournalMessages(AbstractJournalStorageManager.JournalContent.MESSAGES.typeByte),
LargeMessages((byte) 2),
ActivationSequence((byte) 3);
private byte code;
SyncDataType(byte code) {
this.code = code;
}
public static AbstractJournalStorageManager.JournalContent getJournalContentType(SyncDataType dataType) {
return AbstractJournalStorageManager.JournalContent.getType(dataType.code);
}
public static SyncDataType getDataType(byte code) {
if (code == JournalBindings.code)
return JournalBindings;
if (code == JournalMessages.code)
return JournalMessages;
if (code == LargeMessages.code)
return LargeMessages;
if (code == ActivationSequence.code)
return ActivationSequence;
throw new InvalidParameterException("invalid byte: " + code);
}
}
public ReplicationStartSyncMessage() {
super(REPLICATION_START_FINISH_SYNC);
}
public ReplicationStartSyncMessage(List filenames) {
this();
ids = new long[filenames.size()];
for (int i = 0; i < filenames.size(); i++) {
ids[i] = filenames.get(i);
}
dataType = SyncDataType.LargeMessages;
nodeID = ""; // this value will be ignored
}
public ReplicationStartSyncMessage(String nodeID, long nodeDataVersion) {
this(nodeID);
ids = new long[1];
ids[0] = nodeDataVersion;
dataType = SyncDataType.ActivationSequence;
}
public ReplicationStartSyncMessage(String nodeID) {
this();
synchronizationIsFinished = true;
this.nodeID = nodeID;
}
public ReplicationStartSyncMessage(JournalFile[] datafiles,
AbstractJournalStorageManager.JournalContent contentType,
String nodeID,
boolean allowsAutoFailBack) {
this();
this.nodeID = nodeID;
this.allowsAutoFailBack = allowsAutoFailBack;
synchronizationIsFinished = false;
ids = new long[datafiles.length];
for (int i = 0; i < datafiles.length; i++) {
ids[i] = datafiles[i].getFileID();
}
switch (contentType) {
case MESSAGES:
dataType = SyncDataType.JournalMessages;
break;
case BINDINGS:
dataType = SyncDataType.JournalBindings;
break;
default:
throw new IllegalArgumentException();
}
}
@Override
public int expectedEncodeSize() {
int size = PACKET_HEADERS_SIZE +
DataConstants.SIZE_BOOLEAN + // buffer.writeBoolean(synchronizationIsFinished);
DataConstants.SIZE_BOOLEAN + // buffer.writeBoolean(allowsAutoFailBack);
nodeID.length() * 3; // buffer.writeString(nodeID); -- an estimate
size += DataConstants.SIZE_BYTE + // buffer.writeByte(dataType.code);
DataConstants.SIZE_INT + // buffer.writeInt(ids.length);
DataConstants.SIZE_LONG * ids.length; // the write loop
return size;
}
@Override
public void encodeRest(final ActiveMQBuffer buffer) {
buffer.writeBoolean(synchronizationIsFinished);
buffer.writeBoolean(allowsAutoFailBack);
buffer.writeString(nodeID);
buffer.writeByte(dataType.code);
buffer.writeInt(ids.length);
for (long id : ids) {
buffer.writeLong(id);
}
}
@Override
public void decodeRest(final ActiveMQBuffer buffer) {
synchronizationIsFinished = buffer.readBoolean();
allowsAutoFailBack = buffer.readBoolean();
nodeID = buffer.readString();
dataType = SyncDataType.getDataType(buffer.readByte());
int length = buffer.readInt();
ids = new long[length];
for (int i = 0; i < length; i++) {
ids[i] = buffer.readLong();
}
}
/**
* @return whether the server is configured to allow for fail-back
*/
public boolean isServerToFailBack() {
return allowsAutoFailBack;
}
/**
* @return {@code true} if the live has finished synchronizing its data and the backup is
* therefore up-to-date, {@code false} otherwise.
*/
public boolean isSynchronizationFinished() {
return synchronizationIsFinished;
}
public SyncDataType getDataType() {
return dataType;
}
public long[] getFileIds() {
return ids;
}
public String getNodeID() {
return nodeID;
}
@Override
public int hashCode() {
final int prime = 31;
int result = super.hashCode();
result = prime * result + (allowsAutoFailBack ? 1231 : 1237);
result = prime * result + ((dataType == null) ? 0 : dataType.hashCode());
result = prime * result + Arrays.hashCode(ids);
result = prime * result + ((nodeID == null) ? 0 : nodeID.hashCode());
result = prime * result + (synchronizationIsFinished ? 1231 : 1237);
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (!super.equals(obj))
return false;
if (!(obj instanceof ReplicationStartSyncMessage))
return false;
ReplicationStartSyncMessage other = (ReplicationStartSyncMessage) obj;
if (allowsAutoFailBack != other.allowsAutoFailBack)
return false;
if (dataType != other.dataType)
return false;
if (!Arrays.equals(ids, other.ids))
return false;
if (nodeID == null) {
if (other.nodeID != null)
return false;
} else if (!nodeID.equals(other.nodeID))
return false;
if (synchronizationIsFinished != other.synchronizationIsFinished)
return false;
return true;
}
@Override
public String toString() {
StringBuffer buf = new StringBuffer(getParentString());
buf.append(", synchronizationIsFinished=" + synchronizationIsFinished);
buf.append(", dataType=" + dataType);
buf.append(", nodeID=" + nodeID);
buf.append(", ids=" + Arrays.toString(ids));
buf.append(", allowsAutoFailBack=" + allowsAutoFailBack);
buf.append("]");
return buf.toString();
}
}