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ForumThreadState.java
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ForumThreadState.java
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/*
* Copyright 2003-2005 the original author or authors.
* 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.jdon.jivejdon.domain.model;
import java.util.concurrent.atomic.AtomicLong;
import java.util.concurrent.atomic.AtomicReference;
import com.jdon.domain.message.DomainMessage;
import com.jdon.jivejdon.domain.model.subscription.SubscribedState;
import com.jdon.jivejdon.domain.model.subscription.subscribed.ThreadSubscribed;
import com.jdon.jivejdon.domain.model.util.OneOneDTO;
/**
* State is a Value Object, it is immutable. need a pattern to keep immutable.
*
* @author <a href="mailto:banq@163.com">banq</a>
*
*/
public class ForumThreadState {
private final ForumThread forumThread;
/**
* the number of messages in the thread. This includes the root message. So,
* to find the number of replies to the root message, subtract one from the
* answer of this method.
*/
private AtomicLong messageCount;
private AtomicReference<ForumMessage> latestPost;
private SubscribedState subscribedState;
public ForumThreadState(ForumThread forumThread, ForumMessage latestPost, long messageCount) {
this(forumThread);
}
public ForumThreadState(ForumThread forumThread) {
super();
this.forumThread = forumThread;
this.latestPost = new AtomicReference<>();
this.messageCount = new AtomicLong(Integer.MIN_VALUE);
}
/**
* @return Returns the messageCount.
*/
public int getMessageCount() {
if (this.messageCount.get() == Integer.MIN_VALUE)
synchronized(messageCount){
if (this.messageCount.get() == Integer.MIN_VALUE)
projectStateFromEventSource();
}
if (messageCount.get() != Integer.MIN_VALUE)
return messageCount.intValue();
return -1;
}
public long addMessageCount() {
if (getMessageCount() != -1)
return messageCount.incrementAndGet();
else
return 0;
}
public ForumMessage getLatestPost() {
if (this.latestPost.get() == null)
synchronized (latestPost) {
if (this.latestPost.get() == null)
projectStateFromEventSource();
}
return latestPost.get();
}
public void setLatestPost(ForumMessage latestPost) {
getLatestPost();
this.latestPost.set(latestPost);
}
public void projectStateFromEventSource() {
DomainMessage dm = this.forumThread.lazyLoaderRole.projectStateFromEventSource(forumThread.getThreadId());
OneOneDTO oneOneDTO = null;
try {
oneOneDTO = (OneOneDTO) dm.getEventResult();
if (oneOneDTO != null) {
latestPost.set((ForumMessage) oneOneDTO.getParent());
messageCount.set((Long) oneOneDTO.getChild());
dm.clear();
}
} catch (Exception e) {
e.printStackTrace();
}
}
public boolean latestPostIsNull() {
return latestPost.get() == null ? true : false;
}
public ForumThread getForumThread() {
return forumThread;
}
public String getModifiedDate() {
if (getLatestPost() != null)
return getLatestPost().getModifiedDate();
else
return "";
}
public long getModifiedDate2() {
if (getLatestPost() != null)
return getLatestPost().getModifiedDate2();
else
return 0;
}
public SubscribedState getSubscribedState() {
if (this.subscribedState == null && forumThread.getThreadId() != null)
this.subscribedState = new SubscribedState(new ThreadSubscribed(forumThread.getThreadId()));
return this.subscribedState;
}
public int getSubscriptionCount() {
return getSubscribedState().getSubscribedCount(this.forumThread.lazyLoaderRole);
}
public void updateSubscriptionCount(int count) {
getSubscribedState().update(count);
}
}