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/*-
* ============LICENSE_START=======================================================
* Copyright (C) 2016-2018 Ericsson. 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.
*
* SPDX-License-Identifier: Apache-2.0
* ============LICENSE_END=========================================================
*/
package org.onap.policy.apex.core.infrastructure.messaging;
import java.io.Serializable;
import java.net.InetAddress;
import java.util.ArrayList;
import java.util.List;
import org.slf4j.ext.XLogger;
import org.slf4j.ext.XLoggerFactory;
/**
* The Class MessageHolder holds a set of messages to be sent as a single block of messages in this messaging
* implementation.
*
* @author Sajeevan Achuthan (sajeevan.achuthan@ericsson.com)
* @param <M> the generic type of message being handled by a message holder instance
*/
public class MessageHolder<M> implements Serializable {
private static final int HASH_PRIME = 31;
private static final int FOUR_BYTES = 32;
// Serial ID
private static final long serialVersionUID = 1235487535388793719L;
// Get a reference to the logger
private static final XLogger LOGGER = XLoggerFactory.getXLogger(MessageHolder.class);
// Properties of the message holder
private final long creationTime;
private final InetAddress senderHostAddress;
// Sequence of message in the message holder
private final List<M> messages;
/**
* Constructor, create the message holder.
*
* @param senderHostAddress the host address of the sender of the message holder container
*/
public MessageHolder(final InetAddress senderHostAddress) {
LOGGER.entry(senderHostAddress);
messages = new ArrayList<>();
this.senderHostAddress = senderHostAddress;
creationTime = System.currentTimeMillis();
}
/**
* Return the messages in this message holder.
*
* @return the messages
*/
public List<M> getMessages() {
return messages;
}
/**
* Adds a message to this message holder.
*
* @param message the message to add
*/
public void addMessage(final M message) {
if (!messages.contains(message)) {
messages.add(message);
} else {
LOGGER.warn("duplicate message {} added to message holder", message);
}
}
/**
* Gets the creation time.
*
* @return the creation time
*/
public long getCreationTime() {
return creationTime;
}
/**
* Gets the sender host address.
*
* @return the sender host address
*/
public InetAddress getSenderHostAddress() {
return senderHostAddress;
}
/**
* {@inheritDoc}.
*/
@Override
public String toString() {
return "ApexCommandProtocol [creationTime=" + creationTime + ", senderHostAddress=" + senderHostAddress + "]";
}
/**
* {@inheritDoc}.
*/
@Override
public int hashCode() {
final int prime = HASH_PRIME;
int result = 1;
result = prime * result + ((senderHostAddress == null) ? 0 : senderHostAddress.hashCode());
result = prime * result + ((messages == null) ? 0 : messages.hashCode());
result = prime * result + (int) (creationTime ^ (creationTime >>> FOUR_BYTES));
return result;
}
/**
* {@inheritDoc}.
*/
@Override
public boolean equals(final Object obj) {
if (this == obj) {
return true;
}
if (obj == null) {
return false;
}
if (getClass() != obj.getClass()) {
return false;
}
final MessageHolder<?> other = (MessageHolder<?>) obj;
if (senderHostAddress == null) {
if (other.senderHostAddress != null) {
return false;
}
} else if (!senderHostAddress.equals(other.senderHostAddress)) {
return false;
}
if (messages == null) {
if (other.messages != null) {
return false;
}
} else if (!messages.equals(other.messages)) {
return false;
}
return creationTime == other.creationTime;
}
}
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