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POHow to use Instance variable in multiple swing worker thread with thread-safe?
 

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  1. POHow to use Instance variable in multiple swing worker thread with thread-safe?
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    <p>I am using swing worker thread to communicate rest services. My scenerio is i am calling one thread to get the data from rest services and add into my list variable . and another one thread to push the list of data to save it. How to handle this scenerio with thread safe</p> <p>My sample code is below</p> <pre><code> private LinkedList&lt;LinkInfo&gt; ***linkInfoList*** = new LinkedList&lt;FlowLinkEntry&gt;(); SwingWorker&lt;LinkInfo, Void&gt; loadLinkInfoThread = new SwingWorker&lt;LinkInfo, Void&gt;() { @Override protected LinkInfo doInBackground() throws Exception { InputStream is = new URL("Http://URL").openStream(); try { BufferedReader reader = new BufferedReader( new InputStreamReader(is, Charset.forName("UTF-8"))); LinkInfo linkInfo = (LinkInfo)JsonConverter .fromJson(reader, LinkInfo.class); ***linkInfoList*** .add(linkInfo); } finally { is .close(); } return linkInfo; } } SwingWorker&lt;Void, Void&gt; saveLinkInfoThread = new SwingWorker&lt;Void, Void&gt;() { @Override protected Void doInBackground() throws Exception { //post data to particular url //linkInfoList data is posting in this thread URL url = new URL(http://url); URLConnection conn = url.openConnection(); conn.setDoOutput(true); OutputStreamWriter wr = new OutputStreamWriter(conn.getOutputStream()); wr.write(***linkInfoList*** ); wr.flush(); // Get the response BufferedReader rd = new BufferedReader(new InputStreamReader( conn.getInputStream())); } </code></pre> <p>}</p> <p>My questions are </p> <ol> <li><p>How to store the data in linkInfoList as request order wise? (ie) if i call load thread several time,the data should inserted in list request wise.</p></li> <li><p>How to put wait state the save Thread if load Thread is already in progress. I mean that if load thread is in running condition, after completing load thread then only save thread should have to run </p></li> </ol>
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    1. PTQuestion
    1. USMurali
    1. USMurali
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    1. COUse a synchronized block, perhaps?
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      1. POHow to use Instance variable in multiple swing worker thread with thread-safe?
      1. USMarko Topolnik
    2. COTry to use CopyOnWriteArrayList (http://docs.oracle.com/javase/6/docs/api/java/util/concurrent/CopyOnWriteArrayList.html)
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      1. POHow to use Instance variable in multiple swing worker thread with thread-safe?
      1. USalex2410
    3. COHi if i call both thread at that time, I want to run this save thread after completing load thread. Is it possible when i use synchronized?.
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      1. POHow to use Instance variable in multiple swing worker thread with thread-safe?
      1. USMurali
 

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