Examples of com.sun.sgs.service.TransactionParticipant

com.sun.sgs.service.TransactionParticipant
This interface is used by participants in transactions. Typically, each implementation of Service will either implement TransactionParticipant directly, or use some proxy as their participant. Classes that implement TransactionParticipant must also implement Serializable.
Note that the general model assumes that Services will use each other during a transaction. For instance, most Services will use the DataService to persist data. However once the transaction begins to prepare or is aborted (i.e., once any of the methods defined here are called on a participant), a Service may not interact with any other Service in the context of that transaction. Doing so results in unspecified behavior.
This interface does not specify how transaction participants learn the outcome of prepared transactions following a crash. Doing so requires a separate interaction between the participant and the transaction coordinator that is not specified by this interface. Without that additional communication, this interface is sufficient to support transactions with at most one durable transaction participant. @see NonDurableTransactionParticipant

  state = State.PREPARING;
  ProfileParticipantDetailImpl detail = null;
  for (Iterator<TransactionParticipant> iter = participants.iterator();
       iter.hasNext(); )
  {
      TransactionParticipant participant = iter.next();
      if (detailMap != null) {
    detail = detailMap.get(participant.getTypeName());
    startTime = System.currentTimeMillis();
      }
      try {
    if (iter.hasNext() || disablePrepareAndCommitOpt) {
        boolean readOnly = participant.prepare(this);
        if (detail != null) {
      detail.setPrepared(System.currentTimeMillis() -
             startTime, readOnly);
        }
        if (readOnly) {
      iter.remove();
      if (detail != null) {
          collectorHandle.addParticipant(detail);
      }
        }
        if (logger.isLoggable(Level.FINEST)) {
      logger.log(Level.FINEST,
           "prepare {0} participant:{1} returns {2}",
           this, getParticipantInfo(participant),
           readOnly);
        }
    } else {
        participant.prepareAndCommit(this);
        if (detail != null) {
      detail.
          setCommittedDirectly(System.currentTimeMillis() -
             startTime);
      collectorHandle.addParticipant(detail);
        }
        iter.remove();
        if (logger.isLoggable(Level.FINEST)) {
      logger.log(
          Level.FINEST,
          "prepareAndCommit {0} participant:{1} returns",
          this, getParticipantInfo(participant));
        }
    }
      } catch (Exception e) {
    if (logger.isLoggable(Level.FINEST)) {
        logger.logThrow(
      Level.FINEST, e, "{0} {1} participant:{1} throws",
      iter.hasNext() ? "prepare" : "prepareAndCommit",
      this, getParticipantInfo(participant));
    }
    if (state != State.ABORTED) {
        abort(e);
    }
    throw e;
      }
      if (state == State.ABORTED) {
    throw new TransactionAbortedException(
        "Transaction has been aborted: " + abortCause, abortCause);
      }
  }
  state = State.COMMITTING;
  for (TransactionParticipant participant : participants) {
      if (logger.isLoggable(Level.FINEST)) {
    logger.log(Level.FINEST, "commit {0} participant:{1}",
         this, getParticipantInfo(participant));
      }
      if (detailMap != null) {
    detail = detailMap.get(participant.getTypeName());
    startTime = System.currentTimeMillis();
      }
      try {
    participant.commit(this);
    if (detail != null) {
        detail.setCommitted(System.currentTimeMillis() -
          startTime);
        collectorHandle.addParticipant(detail);
    }

View Full Code Here

    /* -- Test abort -- */


    @Test
    public void testAbortNullTxn() throws Exception {
  store.createObject(txn);
  TransactionParticipant participant =
      txn.participants.iterator().next();
  try {
      participant.abort(null);
      fail("Expected NullPointerException");
  } catch (NullPointerException e) {
      System.err.println(e);
  }
    }

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    /* -- Test prepare -- */


    @Test
    public void testPrepareNullTxn() throws Exception {
  store.createObject(txn);
  TransactionParticipant participant =
      txn.participants.iterator().next();
  try {
      participant.prepare(null);
      fail("Expected NullPointerException");
  } catch (NullPointerException e) {
      System.err.println(e);
  }
    }

View Full Code Here

    /* -- Test prepareAndCommit -- */


    @Test
    public void testPrepareAndCommitNullTxn() throws Exception {
  store.createObject(txn);
  TransactionParticipant participant =
      txn.participants.iterator().next();
  try {
      participant.prepareAndCommit(null);
      fail("Expected NullPointerException");
  } catch (NullPointerException e) {
      System.err.println(e);
  }
    }

View Full Code Here

    /* -- Test commit -- */


    @Test
    public void testCommitNullTxn() throws Exception {
  store.createObject(txn);
  TransactionParticipant participant =
      txn.participants.iterator().next();
  try {
      participant.commit(null);
      fail("Expected NullPointerException");
  } catch (NullPointerException e) {
      System.err.println(e);
  }
    }

View Full Code Here

    @Test
    public void testCommitNoTimeout() throws Exception {
  txn.commit();
  txn = new DummyTransaction(UsePrepareAndCommit.NO, 1000) {
      public void join(final TransactionParticipant participant) {
    super.join(new TransactionParticipant() {
        public boolean prepare(Transaction txn) throws Exception {
      return participant.prepare(txn);
        }
        public void commit(Transaction txn) {
      try {

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  handle.getTransaction();
    }


    @Test
    public void testGetTransactionPreparing() {
  TransactionParticipant participant =
      new DummyTransactionParticipant() {
    public boolean prepare(Transaction txn) throws Exception {
        handle.getTransaction();
        return super.prepare(txn);
    }

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  txn.join(participant);
    }


    @Test
    public void testGetTransactionAborting() {
  TransactionParticipant participant =
      new DummyTransactionParticipant() {
    public void abort(Transaction txn) {
        handle.getTransaction();
        super.abort(txn);
    }

View Full Code Here

  handle.getTransaction();
    }


    @Test
    public void testGetTransactionCommitting() throws Exception {
  TransactionParticipant participant =
      new DummyTransactionParticipant() {
    public void commit(Transaction txn) {
        handle.getTransaction();
        super.commit(txn);
    }

View Full Code Here


    @Test
    public void testJoinOtherThread() throws Exception {
  final AtomicReference<RuntimeException> exception =
      new AtomicReference<RuntimeException>(null);
  final TransactionParticipant participant =
      new DummyTransactionParticipant();
  Thread thread = new Thread() {
      public void run() {
    try {
        txn.join(participant);

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Related Classes of com.sun.sgs.service.TransactionParticipant

com.sun.sgs.impl.service.transaction.TransactionImpl

com.sun.sgs.test.impl.service.data.store.TestDataStoreImpl

com.sun.sgs.test.impl.service.transaction.TestTransactionCoordinatorImpl

com.sun.sgs.test.util.DummyTransaction

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