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com.sun.xml.ws.rx.rm.runtime.ServerTube Maven / Gradle / Ivy
/*
* Copyright (c) 1997, 2021 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Distribution License v. 1.0, which is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
package com.sun.xml.ws.rx.rm.runtime;
import com.sun.xml.ws.api.addressing.WSEndpointReference;
import com.sun.xml.ws.api.message.Packet;
import com.sun.xml.ws.api.pipe.Fiber;
import com.sun.xml.ws.api.pipe.NextAction;
import com.sun.xml.ws.api.pipe.TubeCloner;
import com.sun.xml.ws.api.pipe.helper.AbstractFilterTubeImpl;
import com.sun.xml.ws.api.server.WSEndpoint;
import com.sun.istack.logging.Logger;
import com.sun.xml.ws.api.ha.HighAvailabilityProvider;
import com.sun.xml.ws.assembler.dev.ServerTubelineAssemblyContext;
import com.sun.xml.ws.commons.ha.HaContext;
import com.sun.xml.ws.runtime.dev.Session;
import com.sun.xml.ws.runtime.dev.SessionManager;
import com.sun.xml.ws.rx.RxRuntimeException;
import com.sun.xml.ws.rx.rm.RmSecurityException;
import com.sun.xml.ws.rx.rm.api.ReliableMessagingFeature.DeliveryAssurance;
import com.sun.xml.ws.rx.rm.faults.AbstractSoapFaultException;
import com.sun.xml.ws.rx.rm.faults.AbstractSoapFaultException.Code;
import com.sun.xml.ws.rx.rm.faults.CreateSequenceRefusedFault;
import com.sun.xml.ws.rx.rm.localization.LocalizationMessages;
import com.sun.xml.ws.rx.rm.protocol.AcknowledgementData;
import com.sun.xml.ws.rx.rm.protocol.AcknowledgementData.Builder;
import com.sun.xml.ws.rx.rm.protocol.CloseSequenceData;
import com.sun.xml.ws.rx.rm.protocol.CloseSequenceResponseData;
import com.sun.xml.ws.rx.rm.protocol.CreateSequenceData;
import com.sun.xml.ws.rx.rm.protocol.CreateSequenceResponseData;
import com.sun.xml.ws.rx.rm.protocol.TerminateSequenceData;
import com.sun.xml.ws.rx.rm.protocol.TerminateSequenceResponseData;
import com.sun.xml.ws.rx.rm.runtime.delivery.DeliveryQueueBuilder;
import com.sun.xml.ws.rx.rm.runtime.delivery.PostmanPool;
import com.sun.xml.ws.rx.rm.runtime.sequence.DuplicateMessageRegistrationException;
import com.sun.xml.ws.rx.rm.runtime.sequence.Sequence;
import com.sun.xml.ws.rx.rm.runtime.sequence.SequenceManager;
import com.sun.xml.ws.rx.rm.runtime.sequence.SequenceManagerFactory;
import com.sun.xml.ws.rx.rm.runtime.sequence.UnknownSequenceException;
import com.sun.xml.ws.rx.rm.runtime.transaction.TransactionPropertySet;
import com.sun.xml.ws.rx.util.Communicator;
import com.sun.xml.ws.security.secconv.STRValidationHelper;
import com.sun.xml.ws.security.secext10.SecurityTokenReferenceType;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.logging.Level;
import javax.xml.ws.EndpointReference;
/**
*
*/
public class ServerTube extends AbstractFilterTubeImpl {
private static final Logger LOGGER = Logger.getLogger(ServerTube.class);
private static final Level PROTOCOL_FAULT_LOGGING_LEVEL = Level.WARNING;
/**
* Property that is exposing current sequence identifier through the message context
*/
static final String SEQUENCE_PROPERTY = "com.sun.xml.ws.sequence";
/**
* Property that is exposing current message number through the message context
*/
static final String MESSAGE_NUMBER_PROPERTY = "com.sun.xml.ws.messagenumber";
//
private final RuntimeContext rc;
private final WSEndpoint endpoint;
private STRValidationHelper validator;
public ServerTube(ServerTube original, TubeCloner cloner) {
super(original, cloner);
this.rc = original.rc;
this.endpoint = original.endpoint;
this.validator = original.validator;
}
public ServerTube(RmConfiguration configuration, ServerTubelineAssemblyContext context) {
super(context.getTubelineHead());
this.endpoint = context.getEndpoint();
// TODO P3 don't take the first config alternative automatically...
if (configuration.getAddressingVersion() == null) {
throw new RxRuntimeException(LocalizationMessages.WSRM_1140_NO_ADDRESSING_VERSION_ON_ENDPOINT());
}
RuntimeContext.Builder rcBuilder = RuntimeContext.builder(
configuration,
Communicator.builder("rm-server-tube-communicator")
.tubelineHead(super.next)
.addressingVersion(configuration.getAddressingVersion())
.soapVersion(configuration.getSoapVersion())
.jaxbContext(configuration.getRuntimeVersion().getJaxbContext(configuration.getAddressingVersion()))
.container(context.getEndpoint().getContainer())
.build());
this.rc = rcBuilder.build();
DeliveryQueueBuilder inboundQueueBuilder = DeliveryQueueBuilder.getBuilder(
configuration,
PostmanPool.INSTANCE.getPostman(),
new ServerDestinationDeliveryCallback(rc));
DeliveryQueueBuilder outboundQueueBuilder = null;
if (configuration.requestResponseOperationsDetected()) {
outboundQueueBuilder = DeliveryQueueBuilder.getBuilder(
configuration,
PostmanPool.INSTANCE.getPostman(),
new ServerSourceDeliveryCallback(rc));
}
SequenceManager sequenceManager = SequenceManagerFactory.INSTANCE.createSequenceManager(
configuration.getRmFeature().isPersistenceEnabled(),
context.getEndpoint().getServiceName() + "::" + context.getEndpoint().getPortName(),
inboundQueueBuilder,
outboundQueueBuilder,
configuration,
context.getEndpoint().getContainer(),
null);
this.rc.setSequenceManager(sequenceManager);
// TODO instead of default, consider adding Metro impl to the container
validator = context.getEndpoint().getContainer().getSPI(STRValidationHelper.class);
if (validator == null) {
validator = new MetroSTRValidationHelper();
}
LOGGER.fine("STRValidationHelper: " + validator.getClass().getName());
}
@Override
public ServerTube copy(TubeCloner cloner) {
LOGGER.entering();
try {
return new ServerTube(this, cloner);
} finally {
LOGGER.exiting();
}
}
@Override
public NextAction processRequest(Packet request) {
LOGGER.entering();
try {
HaContext.initFrom(request);
if (HaContext.failoverDetected()) {
rc.sequenceManager().invalidateCache();
}
String wsaAction = rc.communicator.getWsaAction(request);
if (rc.rmVersion.protocolVersion.isProtocolAction(wsaAction)) { // protocol message
return doReturnWith(processProtocolMessage(request, wsaAction));
}
// This is an application message
// prevent closing of TBC in case of one-way - we want to send acknowledgement back at least
request.keepTransportBackChannelOpen();
final JaxwsApplicationMessage message = new JaxwsApplicationMessage(request, request.getMessage().getID(rc.addressingVersion, rc.soapVersion));
rc.protocolHandler.loadSequenceHeaderData(message, message.getJaxwsMessage());
rc.protocolHandler.loadAcknowledgementData(message, message.getJaxwsMessage());
validateSecurityContextTokenId(rc.sequenceManager().getInboundSequence(message.getSequenceId()).getBoundSecurityTokenReferenceId(), message.getPacket());
if (!hasSession(request)) { // security did not set session - we must do it
setSession(message.getSequenceId(), request);
}
exposeSequenceDataToUser(message);
rc.destinationMessageHandler.processAcknowledgements(message.getAcknowledgementData());
boolean txConfigEnabled = isTransactionConfigEnabled();
if (txConfigEnabled) {
boolean canBegin = rc.transactionHandler.canBegin();
if (canBegin) {
int txTimeout = rc.configuration.getInternalRmFeature().getUserTransactionTimeout();
rc.transactionHandler.begin(txTimeout);
TransactionPropertySet ps = new TransactionPropertySet();
ps.setTransactionOwned(true);
message.getPacket().addSatellite(ps);
} else {
if (LOGGER.isLoggable(Level.WARNING)) {
LOGGER.warning(LocalizationMessages.WSRM_5001_COULD_NOT_BEGIN_TRANSACTION());
}
}
}
boolean persistenceEnabled = rc.configuration.getRmFeature().isPersistenceEnabled();
try {
rc.destinationMessageHandler.registerMessage(message, !persistenceEnabled);
} catch (DuplicateMessageRegistrationException ex) {
if (LOGGER.isLoggable(Level.FINE)) {
LOGGER.fine(LocalizationMessages.WSRM_1145_DUPLICATE_MSG_NUMBER_RECEIVED(
message.getMessageNumber(),
message.getSequenceId()), ex);
}
return handleDuplicateMessageException(message, request);
}
synchronized (message.getCorrelationId()) {
// this synchronization is needed so that all 3 operations occur before
// AbstractResponseHandler.getParentFiber() is invoked on the response thread
rc.suspendedFiberStorage.register(message.getCorrelationId(), Fiber.current());
return doSuspend(new Runnable() {
@Override
public void run() {
rc.destinationMessageHandler.putToDeliveryQueue(message);
}
});
}
} catch (AbstractSoapFaultException ex) {
LOGGER.logException(ex, PROTOCOL_FAULT_LOGGING_LEVEL);
return doReturnWith(ex.toResponse(rc, request));
} catch (RxRuntimeException ex) {
LOGGER.logSevereException(ex);
return doThrow(ex);
} finally {
HaContext.clear();
LOGGER.exiting();
}
}
@Override
public NextAction processResponse(Packet response) {
LOGGER.entering();
try {
return super.processResponse(response);
} finally {
LOGGER.exiting();
}
}
@Override
public NextAction processException(Throwable throwable) {
LOGGER.entering();
try {
return super.processException(throwable);
} finally {
LOGGER.exiting();
}
}
@Override
public void preDestroy() {
LOGGER.entering();
try {
rc.close();
SessionManager.removeSessionManager(endpoint);
} finally {
super.preDestroy();
LOGGER.exiting();
}
}
private NextAction handleDuplicateMessageException(final JaxwsApplicationMessage message, Packet request) throws UnknownSequenceException, RxRuntimeException {
// Is failed over during request processing?
final Sequence inboundSequence = rc.sequenceManager().getInboundSequence(message.getSequenceId());
if (inboundSequence.isFailedOver(message.getMessageNumber())) {
synchronized (message.getCorrelationId()) {
// this synchronization is needed so that all 3 operations occur before
// AbstractResponseHandler.getParentFiber() is invoked on the response thread
rc.suspendedFiberStorage.register(message.getCorrelationId(), Fiber.current());
return doSuspend(new Runnable() {
@Override
public void run() {
rc.destinationMessageHandler.putToDeliveryQueue(message);
}
});
}
}
// Microsoft replay model behavior where a request is sent only to give a ride to a
// previously generated and retained response
final Sequence outboundSequence = rc.sequenceManager().getBoundSequence(message.getSequenceId());
if (outboundSequence != null) {
final ApplicationMessage _responseMessage = outboundSequence.retrieveMessage(message.getCorrelationId());
if (_responseMessage == null) {
return doReturnWith(rc.protocolHandler.createEmptyAcknowledgementResponse(
rc.destinationMessageHandler.getAcknowledgementData(message.getSequenceId()),
request));
}
if (rc.configuration.getRmFeature().isPersistenceEnabled() || HighAvailabilityProvider.INSTANCE.isHaEnvironmentConfigured()) {
if (_responseMessage instanceof JaxwsApplicationMessage) {
JaxwsApplicationMessage jaxwsAppMsg = (JaxwsApplicationMessage) _responseMessage;
if (jaxwsAppMsg.getPacket() == null) {
// FIXME: loaded from DB without a valid packet - create one
// ...this is a workaround until JAX-WS RI API provides a mechanism how to (de)serialize whole Packet
jaxwsAppMsg.setPacket(rc.communicator.createEmptyResponsePacket(request, jaxwsAppMsg.getWsaAction()));
}
}
}
// retrieved response is not null
Fiber oldRegisteredFiber = rc.suspendedFiberStorage.register(_responseMessage.getCorrelationId(), Fiber.current());
if (oldRegisteredFiber != null) {
oldRegisteredFiber.resume(rc.protocolHandler.createEmptyAcknowledgementResponse(
rc.destinationMessageHandler.getAcknowledgementData(message.getSequenceId()),
request));
}
return doSuspend(new Runnable() {
@Override
public void run() {
rc.sourceMessageHandler.putToDeliveryQueue(_responseMessage);
}
});
} else {
return doReturnWith(rc.protocolHandler.createEmptyAcknowledgementResponse(
rc.destinationMessageHandler.getAcknowledgementData(message.getSequenceId()),
request));
}
}
private Packet processProtocolMessage(Packet request, String wsaAction) throws AbstractSoapFaultException {
Packet responsePacket = null;
if (rc.rmVersion.protocolVersion.createSequenceAction.equals(wsaAction)) {
responsePacket = handleCreateSequenceAction(request);
} else if (rc.rmVersion.protocolVersion.closeSequenceAction.equals(wsaAction)) {
responsePacket = handleCloseSequenceAction(request);
} else if (rc.rmVersion.protocolVersion.terminateSequenceAction.equals(wsaAction)) {
responsePacket = handleTerminateSequenceAction(request);
} else if (rc.rmVersion.protocolVersion.ackRequestedAction.equals(wsaAction)) {
responsePacket = handleAckRequestedAction(request);
} else if (rc.rmVersion.protocolVersion.sequenceAcknowledgementAction.equals(wsaAction)) {
responsePacket = handleSequenceAcknowledgementAction(request);
} else if (rc.rmVersion.protocolVersion.terminateSequenceResponseAction.equals(wsaAction)) {
responsePacket = handleTerminateSequenceResponseAction(request);
} else {
throw LOGGER.logSevereException(new RxRuntimeException(LocalizationMessages.WSRM_1134_UNSUPPORTED_PROTOCOL_MESSAGE(wsaAction)));
}
responsePacket.setIsProtocolMessage();
return responsePacket;
}
private Packet handleCreateSequenceAction(Packet request) throws CreateSequenceRefusedFault {
CreateSequenceData requestData = rc.protocolHandler.toCreateSequenceData(request);
EndpointReference requestDestination = null;
if (requestData.getOfferedSequenceId() != null && rc.configuration.requestResponseOperationsDetected()) {
// there is an offered sequence and this endpoint does contain some 2-way operations
// if this is a oneway-only endpoint, we simply ignore the offered sequence (WS-I RSP R0011)
if (rc.sequenceManager().isValid(requestData.getOfferedSequenceId())) {
// we already have such sequence
throw new CreateSequenceRefusedFault(
LocalizationMessages.WSRM_1137_OFFERED_ID_ALREADY_IN_USE(requestData.getOfferedSequenceId()),
Code.Sender);
}
final String wsaTo = rc.communicator.getWsaTo(request);
try {
requestDestination = new WSEndpointReference(new URI(wsaTo), rc.addressingVersion).toSpec();
} catch (URISyntaxException e) {
throw new CreateSequenceRefusedFault(
LocalizationMessages.WSRM_1129_INVALID_VALUE_OF_MESSAGE_HEADER("To", "CreateSequence", wsaTo),
Code.Sender,
e);
} catch (NullPointerException e) {
throw new CreateSequenceRefusedFault(
LocalizationMessages.WSRM_1130_MISSING_MESSAGE_HEADER("To", "CreateSequence", wsaTo),
Code.Sender,
e);
}
}
String receivedSctId = null;
if (requestData.getStrType() != null) { // RM messaging should be bound to a secured session
// FIXME: The STR processing should probably only check if the
// com.sun.xml.ws.runtime.util.Session was started by security tube
// and if the STR id equals to the one in this session...
String activeSctId = validator.getSecurityContextTokenId(request);
if (activeSctId == null) {
throw new CreateSequenceRefusedFault(
LocalizationMessages.WSRM_1133_NO_SECURITY_TOKEN_IN_REQUEST_PACKET(),
Code.Sender);
}
try {
receivedSctId = validator.extractSecurityTokenId(requestData.getStrType());
} catch (Exception ex) {
throw new CreateSequenceRefusedFault(
ex.getMessage(),
Code.Sender);
}
if (!activeSctId.equals(receivedSctId)) {
throw new CreateSequenceRefusedFault(
LocalizationMessages.WSRM_1131_SECURITY_TOKEN_AUTHORIZATION_ERROR(receivedSctId, activeSctId),
Code.Sender);
}
}
Sequence inboundSequence = rc.sequenceManager().createInboundSequence(
rc.sequenceManager().generateSequenceUID(),
receivedSctId,
calculateSequenceExpirationTime(requestData.getDuration()));
final CreateSequenceResponseData.Builder responseBuilder = CreateSequenceResponseData.getBuilder(inboundSequence.getId());
// TODO P2 set expiration time, incomplete sequence behavior
if (requestData.getOfferedSequenceId() != null && rc.configuration.requestResponseOperationsDetected()) {
// there is an offered sequence and this endpoint does contain some 2-way operations
// if this is a oneway-only endpoint, we simply ignore the offered sequence (WS-I RSP R0011)
Sequence outboundSequence = rc.sequenceManager().createOutboundSequence(
requestData.getOfferedSequenceId(),
receivedSctId,
calculateSequenceExpirationTime(requestData.getOfferedSequenceExpiry()));
rc.sequenceManager().bindSequences(inboundSequence.getId(), outboundSequence.getId());
rc.sequenceManager().bindSequences(outboundSequence.getId(), inboundSequence.getId());
responseBuilder.acceptedSequenceAcksTo(requestDestination);
}
if (!hasSession(request)) { // security did not start session - we must do it
Utilities.startSession(request.endpoint, inboundSequence.getId());
}
return rc.protocolHandler.toPacket(responseBuilder.build(), request, false);
}
private class MetroSTRValidationHelper implements STRValidationHelper {
@Override
public String getSecurityContextTokenId(final Packet packet) {
final Session session = getSession(packet);
return (session != null) ? session.getSecurityInfo().getIdentifier() : null;
}
@Override
public String extractSecurityTokenId(final SecurityTokenReferenceType str) throws Exception {
return Utilities.extractSecurityContextTokenId(str);
}
}
private Packet handleCloseSequenceAction(Packet request) {
CloseSequenceData requestData = rc.protocolHandler.toCloseSequenceData(request);
rc.destinationMessageHandler.processAcknowledgements(requestData.getAcknowledgementData());
Sequence inboundSequence = rc.sequenceManager().getInboundSequence(requestData.getSequenceId());
// TODO handle last message number - pass it to the sequence so that it can allocate new unacked messages if necessary
// int lastMessageNumber = closeSeqElement.getLastMsgNumber();
String boundSequenceId = rc.getBoundSequenceId(inboundSequence.getId());
try {
rc.sequenceManager().closeSequence(inboundSequence.getId());
final CloseSequenceResponseData.Builder responseBuilder = CloseSequenceResponseData.getBuilder(inboundSequence.getId());
// override the final sequence acknowledgement data as this sequence is not closed yet, but is closing already
Builder ackDataBuilder = AcknowledgementData.getBuilder(rc.destinationMessageHandler.getAcknowledgementData(inboundSequence.getId()));
ackDataBuilder.acknowledgements(inboundSequence.getId(), inboundSequence.getAcknowledgedMessageNumbers(), true);
inboundSequence.clearAckRequestedFlag();
responseBuilder.acknowledgementData(ackDataBuilder.build());
return rc.protocolHandler.toPacket(responseBuilder.build(), request, false);
} finally {
if (boundSequenceId != null) {
rc.sequenceManager().closeSequence(boundSequenceId);
}
}
}
private Packet handleTerminateSequenceAction(Packet request) {
TerminateSequenceData requestData = rc.protocolHandler.toTerminateSequenceData(request);
rc.destinationMessageHandler.processAcknowledgements(requestData.getAcknowledgementData());
Sequence inboundSequence = rc.sequenceManager().getInboundSequence(requestData.getSequenceId());
Sequence outboundSeqence = rc.sequenceManager().getBoundSequence(requestData.getSequenceId());
try {
final TerminateSequenceResponseData.Builder responseBuilder = TerminateSequenceResponseData.getBuilder(inboundSequence.getId());
responseBuilder.acknowledgementData(rc.destinationMessageHandler.getAcknowledgementData(inboundSequence.getId()));
if (outboundSeqence != null) {
responseBuilder.boundSequenceData(outboundSeqence.getId(), outboundSeqence.getLastMessageNumber());
}
return rc.protocolHandler.toPacket(responseBuilder.build(), request, false);
} finally {
Utilities.endSessionIfExists(request.endpoint, inboundSequence.getId());
try {
rc.sequenceManager().terminateSequence(inboundSequence.getId());
} finally {
if (outboundSeqence != null) {
rc.sequenceManager().terminateSequence(outboundSeqence.getId());
}
}
}
}
private Packet handleTerminateSequenceResponseAction(Packet request) {
TerminateSequenceResponseData data = rc.protocolHandler.toTerminateSequenceResponseData(request);
rc.destinationMessageHandler.processAcknowledgements(data.getAcknowledgementData());
// TODO P1 add more TSR data handling
request.transportBackChannel.close();
return rc.communicator.createNullResponsePacket(request);
}
private Packet handleSequenceAcknowledgementAction(Packet request) { // TODO move packet creation processing to protocol handler
AcknowledgementData ackData = rc.protocolHandler.getAcknowledgementData(request.getMessage());
rc.destinationMessageHandler.processAcknowledgements(ackData);
request.transportBackChannel.close();
return rc.communicator.createNullResponsePacket(request);
}
private Packet handleAckRequestedAction(Packet request) { // TODO move packet creation processing to protocol handler
//when true, RM_SEQUENCES DB table row contention is avoided when handling AckRequested
boolean noStateUpdate = (rc.configuration.getInternalRmFeature() != null);
AcknowledgementData ackData = rc.protocolHandler.getAcknowledgementData(request.getMessage());
rc.destinationMessageHandler.processAcknowledgements(ackData, noStateUpdate);
return rc.protocolHandler.createEmptyAcknowledgementResponse(rc.destinationMessageHandler.getAcknowledgementData(ackData.getAckReqestedSequenceId(), true, noStateUpdate), request);
}
/**
* TODO javadoc
*/
private Session getSession(Packet packet) {
String sessionId = (String) packet.invocationProperties.get(Session.SESSION_ID_KEY);
if (sessionId == null) {
return null;
}
return SessionManager.getSessionManager(packet.endpoint,null).getSession(sessionId);
}
/**
* TODO javadoc
*/
private boolean hasSession(Packet packet) {
return getSession(packet) != null;
}
/**
* TODO javadoc
*/
private void setSession(String sessionId, Packet packet) {
packet.invocationProperties.put(Session.SESSION_ID_KEY, sessionId);
Session session = SessionManager.getSessionManager(packet.endpoint,null).getSession(sessionId);
if (session == null) {
session = Utilities.startSession(packet.endpoint, sessionId);
}
packet.invocationProperties.put(Session.SESSION_KEY, session.getUserData());
}
private void exposeSequenceDataToUser(JaxwsApplicationMessage message) {
message.getPacket().invocationProperties.put(SEQUENCE_PROPERTY, message.getSequenceId());
message.getPacket().invocationProperties.put(MESSAGE_NUMBER_PROPERTY, message.getMessageNumber());
}
/**
* Determines whether the security context token identifier used to secure the message
* wrapped in the packet is the expected one
*
* @param expectedStrId expected security context token identifier
* @param packet packet wrapping the checked message
* @throws RmSecurityException if the actual security context token identifier does not equal to the expected one
*/
private void validateSecurityContextTokenId(String expectedSctId, Packet packet) throws RmSecurityException {
String actualSctId = validator.getSecurityContextTokenId(packet);
boolean isValid = (expectedSctId != null) ? expectedSctId.equals(actualSctId) : actualSctId == null;
if (!isValid) {
throw new RmSecurityException(LocalizationMessages.WSRM_1131_SECURITY_TOKEN_AUTHORIZATION_ERROR(actualSctId, expectedSctId));
}
}
private long calculateSequenceExpirationTime(long expiryDuration) {
if (expiryDuration == Sequence.NO_EXPIRY) {
return Sequence.NO_EXPIRY;
} else {
return expiryDuration + rc.sequenceManager().currentTimeInMillis();
}
}
/**
* Is distributed TX required that makes delivery to the application layer and
* recording that fact one unit? This is to avoid duplicate delivery to the
* application layer when a duplicate request comes in.
*/
private boolean isTransactionConfigEnabled() {
boolean internalRmFeatureExists = (rc.configuration.getInternalRmFeature() != null);
DeliveryAssurance deliveryAssurance = rc.configuration.getRmFeature().getDeliveryAssurance();
boolean noDupQoS =
(deliveryAssurance.equals(DeliveryAssurance.EXACTLY_ONCE) ||
deliveryAssurance.equals(DeliveryAssurance.AT_MOST_ONCE));
return internalRmFeatureExists && noDupQoS;
}
}
