org.apache.pulsar.client.impl.MessagesImpl 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.pulsar.client.impl;
import static org.apache.pulsar.shade.com.google.common.base.Preconditions.checkArgument;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import net.jcip.annotations.NotThreadSafe;
import org.apache.pulsar.client.api.Message;
import org.apache.pulsar.client.api.Messages;
@NotThreadSafe
public class MessagesImpl implements Messages {
private final List> messageList;
private final int maxNumberOfMessages;
private final long maxSizeOfMessages;
private int currentNumberOfMessages;
private long currentSizeOfMessages;
protected MessagesImpl(int maxNumberOfMessages, long maxSizeOfMessages) {
this.maxNumberOfMessages = maxNumberOfMessages;
this.maxSizeOfMessages = maxSizeOfMessages;
messageList = maxNumberOfMessages > 0 ? new ArrayList<>(maxNumberOfMessages) : new ArrayList<>();
}
protected boolean canAdd(Message message) {
if (currentNumberOfMessages == 0) {
// It's ok to add at least one message into a batch.
return true;
}
if (maxNumberOfMessages > 0 && currentNumberOfMessages + 1 > maxNumberOfMessages) {
return false;
}
if (maxSizeOfMessages > 0 && currentSizeOfMessages + message.size() > maxSizeOfMessages) {
return false;
}
return true;
}
protected void add(Message message) {
if (message == null) {
return;
}
checkArgument(canAdd(message), "No more space to add messages.");
currentNumberOfMessages++;
currentSizeOfMessages += message.size();
messageList.add(message);
}
@Override
public int size() {
return messageList.size();
}
public void clear() {
this.currentNumberOfMessages = 0;
this.currentSizeOfMessages = 0;
this.messageList.clear();
}
List> getMessageList() {
return messageList;
}
@Override
public Iterator> iterator() {
return messageList.iterator();
}
}