| /* |
| * 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 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<T> implements Messages<T> { |
| |
| private final List<Message<T>> 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<T> 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<T> 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<Message<T>> getMessageList() { |
| return messageList; |
| } |
| |
| @Override |
| public Iterator<Message<T>> iterator() { |
| return messageList.iterator(); |
| } |
| } |