public boolean commit(int xid)
throws RemoteException, TransactionAbortedException, InvalidTransactionException {
System.out.println("TM starts to commit " + xid);
if (!xidIsValid(xid)) {
File f = new File(logFile);
if (f.exists()) throw new TransactionAbortedException(xid, "");
else throw new InvalidTransactionException(xid, "");
}
if (!enlistList.containsKey(xid)) {
throw new TransactionAbortedException(xid, "Nonexist xid for TM.");
}
Set<ResourceManager> commitSet = enlistList.get(xid);
System.out.println(xid + " TM commitSet size: " + commitSet.size());
ResourceManager rm = null;
Iterator<ResourceManager> i = commitSet.iterator();
try {
while (i.hasNext()) {
rm = i.next();
rm.vote(xid, TwoPC_ST.Prepared);
rm.getMyRMIName();
System.out.println(rm.getMyRMIName() + " in TM commit " + xid);
}
} catch (Exception e) {
System.out.println("When vote, there is an exception");
enlistList.get(xid).remove(rm);
abort(xid);
throw new TransactionAbortedException(xid, "invalid rm");
}
if (dieTMBeforeCommit) dieNow();
// log "committed" here, and enlistList
try {
File logF = new File(logFile);
FileWriter fw = new FileWriter(logF.getAbsoluteFile(), true);
bw = new BufferedWriter(fw);
bw.write(Integer.toString(xid));
bw.write(" committed\n");
bw.close();
ObjectOutputStream protocolDBBackup =
new ObjectOutputStream(new FileOutputStream(protocolDBFile));
protocolDBBackup.writeObject(protocolDB);
protocolDBBackup.close();
ObjectOutputStream enlistFileBackup =
new ObjectOutputStream(new FileOutputStream(enlistFile));
enlistFileBackup.writeObject(enlistList);
enlistFileBackup.close();
} catch (IOException e) {
e.printStackTrace();
}
if (dieTMAfterCommit) dieNow();
for (ResourceManager r : commitSet) {
r.commit(xid);
}
protocolDB.remove(xid);
enlistList.remove(xid);
try {
ObjectOutputStream protocolDBBackup =
new ObjectOutputStream(new FileOutputStream(protocolDBFile));
protocolDBBackup.writeObject(protocolDB);
protocolDBBackup.close(); // enlistFile
ObjectOutputStream enlistFileBackup =
new ObjectOutputStream(new FileOutputStream(enlistFile));
enlistFileBackup.writeObject(enlistList);
enlistFileBackup.close();
} catch (IOException e) {
e.printStackTrace();
}
return true;
}
public static void main(String[] args) {
Ping obj = null;
Registry registry = null;
try {
/*
* create registry
*/
TestLibrary.suggestSecurityManager("java.rmi.RMISecurityManager");
System.err.println("creating Registry...");
registry = TestLibrary.createRegistryOnUnusedPort();
int port = TestLibrary.getRegistryPort(registry);
/*
* create object with custom ref and bind in registry
*/
System.err.println("creating UseCustomRef...");
UseCustomRef cr = new UseCustomRef();
RemoteRef ref = cr.getRef();
if (!(ref instanceof CustomServerRef)) {
TestLibrary.bomb("test failed: reference not " + "instanceof CustomServerRef");
}
String name = "//:" + port + "/UseCustomRef";
// String name = "UseCustomRef";
System.err.println("binding object in registry...");
Naming.rebind(name, cr);
/*
* look up object and invoke its ping method
*/
System.err.println("ping object...");
obj = (Ping) Naming.lookup(name);
obj.ping();
/*
* pass object with custom ref in remote call
*/
System.err.println("pass object in remote call...");
obj.receiveAndPing(cr);
/*
* write remote object with custom ref to output stream
*/
System.err.println("writing remote object to stream...");
ByteArrayOutputStream bout = new ByteArrayOutputStream();
ObjectOutputStream out = new ObjectOutputStream(bout);
out.writeObject(cr);
out.flush();
out.close();
/*
* read back remote object from output stream
*/
System.err.println("reading remote object from stream...");
ObjectInputStream in = new ObjectInputStream(new ByteArrayInputStream(bout.toByteArray()));
cr = (UseCustomRef) in.readObject();
/*
* re-export object and ping
*/
System.err.println("re-export object read...");
cr.exportObject();
System.err.println("look up object again...");
Naming.rebind(name, cr);
System.err.println("ping object read...");
obj = (Ping) Naming.lookup(name);
obj.ping();
System.err.println("TEST PASSED");
Naming.unbind(name);
cr = null;
} catch (Exception e) {
TestLibrary.bomb("test failed with exception: ", e);
} finally {
TestLibrary.unexport(obj);
TestLibrary.unexport(registry);
registry = null;
obj = null;
}
}
