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    <p>I don't think serializing only "some threads" of a program can work, since you will run into problems with synchronization (some of the problems are described here <a href="http://java.sun.com/j2se/1.3/docs/guide/misc/threadPrimitiveDeprecation.html" rel="nofollow noreferrer">http://java.sun.com/j2se/1.3/docs/guide/misc/threadPrimitiveDeprecation.html</a> ). So persisting your whole program is the only viable way to get a consistent state.</p> <p>What you might look into is orthogonal persistence. There are some prototypical implementations:</p> <p><a href="http://research.sun.com/forest/COM.Sun.Labs.Forest.doc.external_www.PJava.main.html" rel="nofollow noreferrer">http://research.sun.com/forest/COM.Sun.Labs.Forest.doc.external_www.PJava.main.html</a></p> <p><a href="http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.17.7429" rel="nofollow noreferrer">http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.17.7429</a></p> <p>But none of them are maintained anymore or have gained a lot of attraction (afaik). I guess checkpointing is not the best solution after all. In my own project <a href="http://www.siebengeisslein.org" rel="nofollow noreferrer">http://www.siebengeisslein.org</a> I am trying the approach of using lightweight transactions to dispatch an event so thread state does not have to be maintained (since at the end of a transaction, the thread callstack is empty again, and if a operation is stopped in mid-transaction, everything is rolled back, so the thread callstack does matter as well). You probably can implement something similar with any OODBMS.</p> <p>Another way to look at things are continuations (<a href="http://en.wikipedia.org/wiki/Continuation" rel="nofollow noreferrer">http://en.wikipedia.org/wiki/Continuation</a> , <a href="http://jauvm.blogspot.com/" rel="nofollow noreferrer">http://jauvm.blogspot.com/</a>). They are a way to suspend execution at defined code locations (but they are not necessarily persisting the thread state).</p> <p>I hope this gives you some starting points (but there is no ready-to-use solution to this afaik).</p> <p>EDIT: After reading your clarifications: You should definitely look into OODBMS. Dispatch each event in its own transaction and don't care about threads.</p>
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