Examples of de.zib.scalaris.Transaction

de.zib.scalaris.Transaction
ink #Transaction()}t1.write(key, value); // {@link #write(String,Object)}t1.write(otpKey, otpValue); // {@link #write(OtpErlangString,OtpErlangObject)}result = t1.read(key).stringValue(); // {@link #read(String)}otpResult = t1.read(otpKey).value(); // {@link #read(OtpErlangString)}transaction.commit(); // {@link #commit()}
For more examples, have a look at {@link de.zib.scalaris.examples.TransactionReadExample}, {@link de.zib.scalaris.examples.TransactionWriteExample} and{@link de.zib.scalaris.examples.TransactionReadWriteExample}.

Connection errors
Errors when setting up connections or trying to send/receive RPCs will be handed to the {@link ConnectionPolicy} that has been set when the connectionwas created. By default, {@link ConnectionFactory} uses{@link DefaultConnectionPolicy} which implements automatic connection-retriesby classifying nodes as good or bad depending on their previous state. The number of automatic retries is adjustable (default: 3). @author Nico Kruber, kruber@zib.de @version 3.9 @since 2.0


        System.out.println("Reading values with the class `Transaction`:");


        System.out.print("    Initialising Transaction object... ");
        try {
            final Transaction transaction = new Transaction();
            System.out.println("done");


            System.out.print("    Starting transaction... ");
            System.out.println("done");


            System.out
                    .println("    `OtpErlangObject readObject(OtpErlangString)`...");
            for (int i = 0; i < otpKeys.arity(); ++i) {
                final OtpErlangString otpKey = (OtpErlangString) otpKeys.elementAt(i);
                try {
                    otpValue = (OtpErlangString) transaction.read(otpKey).value();
                    System.out.println("      read(" + otpKey.stringValue()
                            + ") == " + otpValue.stringValue());
                } catch (final ConnectionException e) {
                    System.out.println("      read(" + otpKey.stringValue()
                            + ") failed: " + e.getMessage());
                } catch (final TimeoutException e) {
                    System.out.println("      read(" + otpKey.stringValue()
                            + ") failed with timeout: " + e.getMessage());
                } catch (final UnknownException e) {
                    System.out.println("      read(" + otpKey.stringValue()
                            + ") failed with unknown: " + e.getMessage());
                } catch (final NotFoundException e) {
                    System.out.println("      read(" + otpKey.stringValue()
                            + ") failed with not found: " + e.getMessage());
                } catch (final ClassCastException e) {
                    System.out.println("      read(" + otpKey.stringValue()
                            + ") failed with unknown return type: " + e.getMessage());
                }
            }


            System.out.println("    `String read(String)`...");
            for (int i = 0; i < keys.length; ++i) {
                final String key = keys[i];
                try {
                    value = transaction.read(key).stringValue();
                    System.out.println("      read(" + key + ") == " + value);
                } catch (final ConnectionException e) {
                    System.out.println("      read(" + key + ") failed: "
                            + e.getMessage());
                } catch (final TimeoutException e) {
                    System.out.println("      read(" + key
                            + ") failed with timeout: " + e.getMessage());
                } catch (final UnknownException e) {
                    System.out.println("      read(" + key
                            + ") failed with unknown: " + e.getMessage());
                } catch (final NotFoundException e) {
                    System.out.println("      read(" + key
                            + ") failed with not found: " + e.getMessage());
                }
            }


            System.out.print("    Committing transaction... ");
            transaction.commit();
            System.out.println("done");
        } catch (final ConnectionException e) {
            System.out.println("failed: " + e.getMessage());
            return;
        } catch (final TimeoutException e) {

View Full Code Here


        System.out.println("Writing values with the class `Transaction`:");


        System.out.print("    Initialising Transaction object... ");
        try {
            final Transaction transaction = new Transaction();
            System.out.println("done");


            System.out.print("    Starting transaction... ");
            System.out.println("done");


            System.out
                    .println("    `writeObject(OtpErlangString, OtpErlangObject)`...");
            for (int i = 0; i < otpKeys.arity(); ++i) {
                final OtpErlangString otpKey = (OtpErlangString) otpKeys.elementAt(i);
                final OtpErlangString otpValue = (OtpErlangString) otpValues
                        .elementAt(i);
                try {
                    transaction.write(otpKey, otpValue);
                    System.out.println("      write(" + otpKey.stringValue()
                            + ", " + otpValue.stringValue() + ") succeeded");
                } catch (final ConnectionException e) {
                    System.out.println("      write(" + otpKey.stringValue()
                            + ", " + otpValue.stringValue() + ") failed: "
                            + e.getMessage());
                } catch (final TimeoutException e) {
                    System.out.println("      write(" + otpKey.stringValue()
                            + ", " + otpValue.stringValue()
                            + ") failed with timeout: " + e.getMessage());
                } catch (final UnknownException e) {
                    System.out.println("      write(" + otpKey.stringValue()
                            + ", " + otpValue.stringValue()
                            + ") failed with unknown: " + e.getMessage());
                }
            }


            System.out.println("    `write(String, String)`...");
            for (int i = 0; i < keys.length; ++i) {
                final String key = keys[i];
                final String value = values[i];
                try {
                    transaction.write(key, value);
                    System.out.println("      write(" + key + ", " + value
                            + ") succeeded");
                } catch (final ConnectionException e) {
                    System.out.println("      write(" + key + ", " + value
                            + ") failed: " + e.getMessage());
                } catch (final TimeoutException e) {
                    System.out.println("      write(" + key + ", " + value
                            + ") failed with timeout: " + e.getMessage());
                } catch (final UnknownException e) {
                    System.out.println("      write(" + key + ", " + value
                            + ") failed with unknown: " + e.getMessage());
                }
            }


            System.out.print("    Committing transaction... ");
            transaction.commit();
            System.out.println("done");
        } catch (final ConnectionException e) {
            System.out.println("failed: " + e.getMessage());
            return;
        } catch (final TimeoutException e) {

View Full Code Here

        String result3 = "";
        System.out.println("Transaction 1 using class `Transaction`:");


        System.out.print("    Initialising Transaction object... ");
        try {
            final Transaction transaction = new Transaction();
            System.out.println("done");


            try {
                System.out.print("    Starting transaction... ");
                System.out.println("done");


                otpWrite(transaction, key1, value1);
                otpWrite(transaction, key2, value2);


                result1 = otpRead(transaction, key1);
                result2 = otpRead(transaction, key2);
                try {
                    result3 = otpRead(transaction, key3);
                } catch (final NotFoundException e) {
//                    System.out.println("    caught not_found for " + key3);
                }


                otpWrite(transaction, key3, result1 + result2);


                result3 = otpRead(transaction, key3);


                System.out.print("    Committing transaction... ");
                transaction.commit();
                System.out.println("done");


                System.out.println();
                System.out.println("    --------------------");
                System.out.println();


                System.out.print("    Starting transaction... ");
                System.out.println("done");


                write(transaction, key1, value1);
                write(transaction, key2, value2);


                result1 = read(transaction, key1);
                result2 = read(transaction, key2);
                try {
                    result3 = read(transaction, key3);
                } catch (final NotFoundException e) {
//                  System.out.println("    caught not_found for " + key3);
                }


                write(transaction, key3, result1 + result2);


                result3 = read(transaction, key3);


                System.out.print("    Committing transaction... ");
                transaction.commit();
                System.out.println("done");
            } catch (final TimeoutException e) {
                // read/write operation
                transaction.abort();
                System.out.println("    Transaction aborted due to timeout: "
                        + e.getMessage());
            } catch (final NotFoundException e) {
                // read/write operation
                transaction.abort();
                System.out
                        .println("    Transaction aborted because elements were not found although they should exist: "
                                + e.getMessage());
            } catch (final AbortException e) {
                System.out.println("    Transaction aborted during commit: "

View Full Code Here

            final String value2, final String key3) {
        System.out.println("Transaction 2 using class `Transaction`:");


        System.out.print("    Initialising Transaction object... ");
        try {
            final Transaction transaction = new Transaction();
            System.out.println("done");


            try {
                System.out.print("    Starting transaction... ");
                System.out.println("done");


                otpWrite(transaction, key1, value1);


                System.out.print("    Committing transaction... ");
                transaction.commit();
                System.out.println("done");


                System.out.print("    Starting transaction... ");
                System.out.println("done");


                otpWrite(transaction, key1, "WRONG value");
                otpRead(transaction, key1);


                System.out.print("    Aborting transaction... ");
                transaction.abort();
                System.out.println("done");


                System.out.print("    Starting transaction... ");
                System.out.println("done");


                otpRead(transaction, key1);


                System.out.print("    Committing transaction... ");
                transaction.commit();
                System.out.println("done");


                System.out.println();
                System.out.println("    --------------------");
                System.out.println();


                System.out.print("    Starting transaction... ");
                System.out.println("done");


                write(transaction, key1, value1);


                System.out.print("    Committing transaction... ");
                transaction.commit();
                System.out.println("done");


                System.out.print("    Starting transaction... ");
                System.out.println("done");


                write(transaction, key1, "WRONG value");
                read(transaction, key1);


                System.out.print("    Aborting transaction... ");
                transaction.abort();
                System.out.println("done");


                System.out.print("    Starting transaction... ");
                System.out.println("done");


                read(transaction, key1);


                System.out.print("    Committing transaction... ");
                transaction.commit();
                System.out.println("done");


            } catch (final TimeoutException e) {
                // read/write operation
                transaction.abort();
                System.out.println("    Transaction aborted due to timeout: "
                        + e.getMessage());
            } catch (final NotFoundException e) {
                // read/write operation
                transaction.abort();
                System.out
                        .println("    Transaction aborted because elements were not found although they should exist: "
                                + e.getMessage());
            } catch (final AbortException e) {
                System.out.println("    Transaction aborted during commit: "

View Full Code Here

                Connection connection = cFactory.createConnection(
                        "wiki_import", true);
                scalaris_single.put(new TransactionSingleOp(connection));
                connection = cFactory.createConnection(
                        "wiki_import", true);
                scalaris_tx.put(new Transaction(connection));
            }
        } catch (ConnectionException e) {
            System.err.println("Connection to Scalaris failed");
            throw new RuntimeException(e);
        } catch (InterruptedException e) {

View Full Code Here

            this.scalaris_pageCount_key = scalaris_pageCount_key;
        }
        
        @Override
        public void run() {
            Transaction scalaris_tx;
            try {
                scalaris_tx = this.scalaris_tx.take();
            } catch (InterruptedException e) {
                System.err.println("update of " + scalaris_pageList_key + " and " + scalaris_pageCount_key + " interrupted while getting connection to Scalaris");
                throw new RuntimeException(e);

View Full Code Here

                    oldPage, newPage, newShortRevs, pageEdits, statName,
                    System.currentTimeMillis() - timeAtStart);
        }
        
        String title = MyWikiModel.normalisePageTitle(title0, nsObject);
        Transaction scalaris_tx = new Transaction(connection);


        // check that the current version is still up-to-date:
        // read old version first, then write
        int oldRevId = -1;
        String pageInfoKey = getPageKey(title0, nsObject);
        
        Transaction.RequestList requests = new Transaction.RequestList();
        requests.addRead(pageInfoKey);
        
        Transaction.ResultList results;
        try {
            results = scalaris_tx.req_list(requests);
        } catch (Exception e) {
            return new SavePageResult(false,
                    "unknown exception getting page info (" + pageInfoKey
                            + ") from Scalaris: " + e.getMessage(),
                    e instanceof ConnectionException, oldPage, newPage,

View Full Code Here

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Related Classes of de.zib.scalaris.Transaction

com.ericsson.otp.erlang.OtpErlangList

com.ericsson.otp.erlang.OtpErlangObject

com.ericsson.otp.erlang.OtpErlangString

com.ericsson.otp.erlang.OtpErlangTuple

de.zib.scalaris.examples.TransactionReadExample

de.zib.scalaris.examples.TransactionReadWriteExample

de.zib.scalaris.examples.TransactionWriteExample

de.zib.scalaris.examples.wikipedia.data.xml.WikiDumpToScalarisHandler

de.zib.scalaris.examples.wikipedia.data.xml.WikiDumpToScalarisHandler$MyScalarisAddToPageListRunnable

de.zib.scalaris.examples.wikipedia.ScalarisDataHandler

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Examples of de.zib.scalaris.Transaction

Connection errors

Related Classes of de.zib.scalaris.Transaction