Examples with ConcurrentAccessReplicator org.apache.synapse.commons.throttle.core.ConcurrentAccessReplicator used on opensource projects

Example 1 with ConcurrentAccessReplicator

use of org.apache.synapse.commons.throttle.core.ConcurrentAccessReplicator in project wso2-synapse by wso2.

the class SynapseCallbackReceiver method handleMessage.

/**
 * Handle the response or error (during a failed send) message received for an outgoing request
 *
 * @param messageID        Request message ID
 * @param response         the Axis2 MessageContext that has been received and has to be handled
 * @param synapseOutMsgCtx the corresponding (outgoing) Synapse MessageContext for the above
 *                         Axis2 MC, that holds Synapse specific information such as the error
 *                         handler stack and local properties etc.
 * @throws AxisFault       if the message cannot be processed
 */
private void handleMessage(String messageID, MessageContext response, org.apache.synapse.MessageContext synapseOutMsgCtx, AsyncCallback callback) throws AxisFault {
    // apply the tenant information to the out message context
    TenantInfoConfigurator configurator = synapseOutMsgCtx.getEnvironment().getTenantInfoConfigurator();
    if (configurator != null) {
        configurator.applyTenantInfo(synapseOutMsgCtx);
    }
    Boolean isConcurrencyThrottleEnabled = (Boolean) synapseOutMsgCtx.getProperty(SynapseConstants.SYNAPSE_CONCURRENCY_THROTTLE);
    if (isConcurrencyThrottleEnabled != null && isConcurrencyThrottleEnabled) {
        ConcurrentAccessController concurrentAccessController = (ConcurrentAccessController) synapseOutMsgCtx.getProperty(SynapseConstants.SYNAPSE_CONCURRENT_ACCESS_CONTROLLER);
        int available = concurrentAccessController.incrementAndGet();
        int concurrentLimit = concurrentAccessController.getLimit();
        if (log.isDebugEnabled()) {
            log.debug("Concurrency Throttle : Connection returned" + " :: " + available + " of available of " + concurrentLimit + " connections");
        }
        ConcurrentAccessReplicator concurrentAccessReplicator = (ConcurrentAccessReplicator) synapseOutMsgCtx.getProperty(SynapseConstants.SYNAPSE_CONCURRENT_ACCESS_REPLICATOR);
        String throttleKey = (String) synapseOutMsgCtx.getProperty(SynapseConstants.SYNAPSE_CONCURRENCY_THROTTLE_KEY);
        if (concurrentAccessReplicator != null) {
            concurrentAccessReplicator.replicate(throttleKey, true);
        }
    }
    Object o = response.getProperty(SynapseConstants.SENDING_FAULT);
    if (o != null && Boolean.TRUE.equals(o)) {
        // This path hits with a fault. Sequence mediator threads should not remove faultSequence.
        // SynapseCallbackReceiver thread should handle the faultStack.
        Pipe pipe = (Pipe) ((Axis2MessageContext) synapseOutMsgCtx).getAxis2MessageContext().getProperty(PassThroughConstants.PASS_THROUGH_PIPE);
        if (pipe != null && pipe.isSerializationComplete()) {
            NHttpServerConnection conn = (NHttpServerConnection) ((Axis2MessageContext) synapseOutMsgCtx).getAxis2MessageContext().getProperty("pass-through.Source-Connection");
            SourceConfiguration sourceConfiguration = (SourceConfiguration) ((Axis2MessageContext) synapseOutMsgCtx).getAxis2MessageContext().getProperty("PASS_THROUGH_SOURCE_CONFIGURATION");
            Pipe newPipe = new Pipe(conn, sourceConfiguration.getBufferFactory().getBuffer(), "source", sourceConfiguration);
            ((Axis2MessageContext) synapseOutMsgCtx).getAxis2MessageContext().setProperty(PassThroughConstants.PASS_THROUGH_PIPE, newPipe);
        }
        // there is a sending fault. propagate the fault to fault handlers.
        Stack faultStack = synapseOutMsgCtx.getFaultStack();
        if (faultStack != null && !faultStack.isEmpty()) {
            // fault envelope
            try {
                synapseOutMsgCtx.getEnvelope().build();
            } catch (Exception x) {
                synapseOutMsgCtx.setEnvelope(response.getEnvelope());
            }
            Exception e = (Exception) response.getProperty(SynapseConstants.ERROR_EXCEPTION);
            synapseOutMsgCtx.setProperty(SynapseConstants.SENDING_FAULT, Boolean.TRUE);
            synapseOutMsgCtx.setProperty(SynapseConstants.ERROR_CODE, response.getProperty(SynapseConstants.ERROR_CODE));
            synapseOutMsgCtx.setProperty(SynapseConstants.ERROR_MESSAGE, response.getProperty(SynapseConstants.ERROR_MESSAGE));
            synapseOutMsgCtx.setProperty(SynapseConstants.ERROR_DETAIL, response.getProperty(SynapseConstants.ERROR_DETAIL));
            synapseOutMsgCtx.setProperty(SynapseConstants.ERROR_EXCEPTION, e);
            if (synapseOutMsgCtx.getEnvironment().isContinuationEnabled()) {
                synapseOutMsgCtx.setContinuationEnabled(true);
            }
            if (log.isDebugEnabled()) {
                log.debug("[Failed Request Message ID : " + messageID + "]" + " [New to be Retried Request Message ID : " + synapseOutMsgCtx.getMessageID() + "]");
            }
            int errorCode = (Integer) response.getProperty(SynapseConstants.ERROR_CODE);
            // If a timeout has occured and the timeout action of the callback is to discard the message
            if (errorCode == SynapseConstants.NHTTP_CONNECTION_TIMEOUT && callback.getTimeOutAction() == SynapseConstants.DISCARD) {
                // Do not execute any fault sequences. Discard message
                if (log.isWarnEnabled()) {
                    log.warn("Synapse timed out for the request with Message ID : " + messageID + ". Ignoring fault handlers since the timeout action is DISCARD");
                }
                faultStack.removeAllElements();
            } else {
                ((FaultHandler) faultStack.pop()).handleFault(synapseOutMsgCtx, null);
            }
        }
    } else {
        // there can always be only one instance of an Endpoint in the faultStack of a message
        // if the send was successful, so remove it before we proceed any further
        Stack faultStack = synapseOutMsgCtx.getFaultStack();
        Endpoint successfulEndpoint = null;
        if (faultStack != null && !faultStack.isEmpty() && faultStack.peek() instanceof Endpoint) {
            successfulEndpoint = (Endpoint) faultStack.pop();
        }
        if (log.isDebugEnabled()) {
            log.debug("Synapse received an asynchronous response message");
            log.debug("Received To: " + (response.getTo() != null ? response.getTo().getAddress() : "null"));
            log.debug("SOAPAction: " + (response.getSoapAction() != null ? response.getSoapAction() : "null"));
            log.debug("WSA-Action: " + (response.getWSAAction() != null ? response.getWSAAction() : "null"));
            String[] cids = null;
            try {
                cids = response.getAttachmentMap().getAllContentIDs();
            } catch (Exception ex) {
                // partially read stream could lead to corrupted attachment map and hence this exception
                // corrupted attachment map leads to inconsistent runtime exceptions and behavior
                // discard the attachment map for the fault handler invocation
                // ensure the successful completion for fault handler flow
                response.setAttachmentMap(null);
                log.error("Synapse encountered an exception when reading attachments from bytes stream. " + "Hence Attachments map is dropped from the message context.", ex);
            }
            if (cids != null && cids.length > 0) {
                for (String cid : cids) {
                    log.debug("Attachment : " + cid);
                }
            }
            log.debug("Body : \n" + response.getEnvelope());
        }
        MessageContext axisOutMsgCtx = ((Axis2MessageContext) synapseOutMsgCtx).getAxis2MessageContext();
        // Processes 'Accept-Encoding'
        ResponseAcceptEncodingProcessor.process(response, axisOutMsgCtx);
        response.setServiceContext(null);
        response.setOperationContext(axisOutMsgCtx.getOperationContext());
        response.setAxisMessage(axisOutMsgCtx.getAxisOperation().getMessage(WSDLConstants.MESSAGE_LABEL_OUT_VALUE));
        // set properties on response
        response.setServerSide(true);
        response.setProperty(SynapseConstants.ISRESPONSE_PROPERTY, Boolean.TRUE);
        response.setProperty(MessageContext.TRANSPORT_OUT, axisOutMsgCtx.getProperty(MessageContext.TRANSPORT_OUT));
        response.setProperty(org.apache.axis2.Constants.OUT_TRANSPORT_INFO, axisOutMsgCtx.getProperty(org.apache.axis2.Constants.OUT_TRANSPORT_INFO));
        response.setTransportIn(axisOutMsgCtx.getTransportIn());
        response.setTransportOut(axisOutMsgCtx.getTransportOut());
        // response.setDoingREST(axisOutMsgCtx.isDoingREST()); This information already present, hence removing
        if (axisOutMsgCtx.isDoingMTOM() && (axisOutMsgCtx.getProperty(org.apache.axis2.Constants.Configuration.ENABLE_MTOM) == null || Boolean.getBoolean((String) axisOutMsgCtx.getProperty(org.apache.axis2.Constants.Configuration.ENABLE_MTOM)) == true)) {
            response.setDoingMTOM(true);
            response.setProperty(org.apache.axis2.Constants.Configuration.ENABLE_MTOM, org.apache.axis2.Constants.VALUE_TRUE);
        }
        if (axisOutMsgCtx.isDoingSwA()) {
            response.setDoingSwA(true);
            response.setProperty(org.apache.axis2.Constants.Configuration.ENABLE_SWA, org.apache.axis2.Constants.VALUE_TRUE);
        }
        // property state to original state.
        if (axisOutMsgCtx.getProperty(AddressingConstants.DISABLE_ADDRESSING_FOR_OUT_MESSAGES) != null) {
            response.setProperty(AddressingConstants.DISABLE_ADDRESSING_FOR_OUT_MESSAGES, axisOutMsgCtx.getProperty(AddressingConstants.DISABLE_ADDRESSING_FOR_OUT_MESSAGES));
        } else {
            response.removeProperty(AddressingConstants.DISABLE_ADDRESSING_FOR_OUT_MESSAGES);
        }
        Object messageType = axisOutMsgCtx.getProperty(org.apache.axis2.Constants.Configuration.MESSAGE_TYPE);
        if (!HTTPConstants.MEDIA_TYPE_X_WWW_FORM.equals(messageType)) {
            // copy the message type property that's used by the out message to the
            // response message
            response.setProperty(org.apache.axis2.Constants.Configuration.MESSAGE_TYPE, messageType);
        }
        if (axisOutMsgCtx.getMessageID() != null) {
            response.setRelationships(new RelatesTo[] { new RelatesTo(axisOutMsgCtx.getMessageID()) });
        }
        response.setReplyTo(axisOutMsgCtx.getReplyTo());
        response.setFaultTo(axisOutMsgCtx.getFaultTo());
        if (axisOutMsgCtx.isPropertyTrue(NhttpConstants.IGNORE_SC_ACCEPTED)) {
            response.setProperty(NhttpConstants.FORCE_SC_ACCEPTED, Constants.VALUE_TRUE);
        }
        // axis2 client options still contains properties such as policy files used in
        // outgoing request. Need to remove those.
        removeUnwantedClientOptions(response);
        // create the synapse message context for the response
        Axis2MessageContext synapseInMessageContext = new Axis2MessageContext(response, synapseOutMsgCtx.getConfiguration(), synapseOutMsgCtx.getEnvironment());
        synapseInMessageContext.setResponse(true);
        Object obj = synapseOutMsgCtx.getProperty(SynapseConstants.FORCE_ERROR_PROPERTY);
        String errorOnSOAPFault = (String) obj;
        if (Constants.VALUE_TRUE.equals(errorOnSOAPFault) && successfulEndpoint != null) {
            if (log.isDebugEnabled()) {
                log.debug("FORCE_ERROR_ON_SOAP_FAULT is true, checking for SOAPFault");
            }
            try {
                RelayUtils.buildMessage(((Axis2MessageContext) synapseInMessageContext).getAxis2MessageContext(), true);
            } catch (Exception e) {
            // handleException("Error while building message", e, synapseInMessageContext);
            }
            if ((synapseInMessageContext.getEnvelope() != null) && synapseInMessageContext.getEnvelope().hasFault()) {
                if (log.isDebugEnabled()) {
                    log.debug("SOAPFault found in response message, forcing endpoint " + successfulEndpoint.getName() + " to fail");
                }
                // setup new pipe configuration..if failure happens (this will be setup as the source writer and during the TargetContext
                // clean up operation the writer will be reset and pull to the buffer
                MessageContext axis2OUTMC = ((Axis2MessageContext) synapseOutMsgCtx).getAxis2MessageContext();
                NHttpServerConnection conn = (NHttpServerConnection) axis2OUTMC.getProperty("pass-through.Source-Connection");
                if (conn != null) {
                    SourceConfiguration sourceConfiguration = (SourceConfiguration) axis2OUTMC.getProperty("PASS_THROUGH_SOURCE_CONFIGURATION");
                    Pipe pipe = new Pipe(conn, sourceConfiguration.getBufferFactory().getBuffer(), "source", sourceConfiguration);
                    axis2OUTMC.setProperty(PassThroughConstants.PASS_THROUGH_PIPE, pipe);
                }
                synapseOutMsgCtx.setProperty(SynapseConstants.SENDING_FAULT, Boolean.TRUE);
                synapseOutMsgCtx.setProperty(SynapseConstants.ERROR_CODE, SynapseConstants.ENDPOINT_CUSTOM_ERROR);
                boolean failOver = false;
                if (successfulEndpoint instanceof AbstractEndpoint) {
                    Endpoint endpoint = ((AbstractEndpoint) successfulEndpoint).getParentEndpoint();
                    if (endpoint != null && (endpoint instanceof FailoverEndpoint)) {
                        failOver = true;
                    }
                }
                for (Object key : synapseOutMsgCtx.getPropertyKeySet()) {
                    synapseInMessageContext.setProperty((String) key, synapseOutMsgCtx.getProperty((String) key));
                }
                if (failOver) {
                    // we may required to handle same message for failover cases only other than that
                    // should treat based on the incoming message
                    ((FaultHandler) successfulEndpoint).handleFault(synapseOutMsgCtx, null);
                } else {
                    faultStack = synapseOutMsgCtx.getFaultStack();
                    if (faultStack != null) {
                        synapseInMessageContext.getFaultStack().addAll(faultStack);
                        ((FaultHandler) successfulEndpoint).handleFault(synapseInMessageContext, null);
                    }
                }
                return;
            } else {
                successfulEndpoint.onSuccess();
            }
        } else if (successfulEndpoint != null) {
            successfulEndpoint.onSuccess();
        }
        synapseInMessageContext.setTo(new EndpointReference(AddressingConstants.Final.WSA_ANONYMOUS_URL));
        synapseInMessageContext.setTracingState(synapseOutMsgCtx.getTracingState());
        synapseInMessageContext.setMessageFlowTracingState(synapseOutMsgCtx.getMessageFlowTracingState());
        for (Object key : synapseOutMsgCtx.getPropertyKeySet()) {
            synapseInMessageContext.setProperty((String) key, synapseOutMsgCtx.getProperty((String) key));
        }
        // Copy SequenceCallStack from original MC to the new MC
        Boolean isContinuationCall = (Boolean) synapseOutMsgCtx.getProperty(SynapseConstants.CONTINUATION_CALL);
        if (isContinuationCall != null && isContinuationCall) {
            // Set the message direction
            if (!synapseOutMsgCtx.isResponse()) {
                synapseInMessageContext.setResponse(false);
            }
            Stack<ContinuationState> seqContinuationStates = synapseOutMsgCtx.getContinuationStateStack();
            for (int i = 0; i < seqContinuationStates.size(); i++) {
                synapseInMessageContext.pushContinuationState(seqContinuationStates.get(i));
            }
        }
        // If this response is related to session affinity endpoints -Server initiated session
        Dispatcher dispatcher = (Dispatcher) synapseOutMsgCtx.getProperty(SynapseConstants.PROP_SAL_ENDPOINT_CURRENT_DISPATCHER);
        if (dispatcher != null && dispatcher.isServerInitiatedSession()) {
            dispatcher.updateSession(synapseInMessageContext);
        }
        // send the response message through the synapse mediation flow
        try {
            synapseOutMsgCtx.getEnvironment().injectMessage(synapseInMessageContext);
        } catch (Exception syne) {
            // introduced to handle runtime exceptions which are occurred inside Synapse handlers
            // partially read stream could lead to corrupted attachment map and hence this exception
            // corrupted attachment map leads to inconsistent runtime exceptions and behavior
            // discard the attachment map for the fault handler invocation
            // ensure the successful completion for fault handler flow
            // even we drop attachment map for both cases messages which have attachment /
            // messages which do not have attachments it would still not be any impact.
            // However setting attachment map to null for messages which do not have attachments is not required.
            // introduced due to the fact conflicts between Axiom exceptions for attachment/ non attachments cases
            // and performance impact that could cause of regular expression matching of exceptional stack traces.
            Axis2MessageContext axis2smc = (Axis2MessageContext) synapseInMessageContext;
            org.apache.axis2.context.MessageContext axis2MessageCtx = axis2smc.getAxis2MessageContext();
            // Set correct status code
            axis2MessageCtx.setProperty(PassThroughConstants.HTTP_SC, HttpStatus.SC_INTERNAL_SERVER_ERROR);
            axis2MessageCtx.setAttachmentMap(null);
            Stack stack = synapseInMessageContext.getFaultStack();
            if (stack != null && stack.isEmpty()) {
                registerFaultHandler(synapseInMessageContext);
            }
            if (stack != null && !stack.isEmpty()) {
                ((FaultHandler) stack.pop()).handleFault(synapseInMessageContext, syne);
            } else {
                log.error("Synapse encountered an exception, " + "No error handlers found - [Message Dropped]\n" + syne.getMessage());
            }
        }
    }
}

Example 2 with ConcurrentAccessReplicator

use of org.apache.synapse.commons.throttle.core.ConcurrentAccessReplicator in project wso2-synapse by wso2.

the class ConcurrencyThrottlingUtils method decrementConcurrencyThrottleAccessController.

/**
 * Decrement the internal counter for concurrency throttling, in case of normal response retrieval,
 * delayed response at synapse timeout, exceptional cases while mediation end up trigger fault.
 * In clustered environment, replicate the decremented value to other members.
 *
 * @param synCtx Synapse Message Context of which mediation occurs.
 */
public static void decrementConcurrencyThrottleAccessController(MessageContext synCtx) {
    Boolean isConcurrencyThrottleEnabled = (Boolean) synCtx.getProperty(SynapseConstants.SYNAPSE_CONCURRENCY_THROTTLE);
    if (isConcurrencyThrottleEnabled != null && isConcurrencyThrottleEnabled) {
        ConcurrentAccessController concurrentAccessController = (ConcurrentAccessController) synCtx.getProperty(SynapseConstants.SYNAPSE_CONCURRENT_ACCESS_CONTROLLER);
        int available = concurrentAccessController.incrementAndGet();
        int concurrentLimit = concurrentAccessController.getLimit();
        if (log.isDebugEnabled()) {
            log.debug("Concurrency Throttle : Connection returned" + " :: " + available + " of available of" + concurrentLimit + " connections");
        }
        ConcurrentAccessReplicator concurrentAccessReplicator = (ConcurrentAccessReplicator) synCtx.getProperty(SynapseConstants.SYNAPSE_CONCURRENT_ACCESS_REPLICATOR);
        String throttleKey = (String) synCtx.getProperty(SynapseConstants.SYNAPSE_CONCURRENCY_THROTTLE_KEY);
        if (concurrentAccessReplicator != null) {
            concurrentAccessReplicator.replicate(throttleKey, true);
        }
        // once decremented, clear the flag since we no longer required to decrement the value
        // concurrency throttle access controller
        synCtx.setProperty(SynapseConstants.SYNAPSE_CONCURRENCY_THROTTLE, false);
    }
}

Example 3 with ConcurrentAccessReplicator

use of org.apache.synapse.commons.throttle.core.ConcurrentAccessReplicator in project wso2-synapse by wso2.

the class ThrottleMediator method init.

public void init(SynapseEnvironment se) {
    if (onAcceptMediator instanceof ManagedLifecycle) {
        ((ManagedLifecycle) onAcceptMediator).init(se);
    } else if (onAcceptSeqKey != null) {
        SequenceMediator onAcceptSeq = (SequenceMediator) se.getSynapseConfiguration().getSequence(onAcceptSeqKey);
        if (onAcceptSeq == null || onAcceptSeq.isDynamic()) {
            se.addUnavailableArtifactRef(onAcceptSeqKey);
        }
    }
    if (onRejectMediator instanceof ManagedLifecycle) {
        ((ManagedLifecycle) onRejectMediator).init(se);
    } else if (onRejectSeqKey != null) {
        SequenceMediator onRejectSeq = (SequenceMediator) se.getSynapseConfiguration().getSequence(onRejectSeqKey);
        if (onRejectSeq == null || onRejectSeq.isDynamic()) {
            se.addUnavailableArtifactRef(onRejectSeqKey);
        }
    }
    // reference to axis2 configuration context
    configContext = ((Axis2SynapseEnvironment) se).getAxis2ConfigurationContext();
    // throttling data holder initialization of
    // runtime throttle data eg :- throttle contexts
    dataHolder = (ThrottleDataHolder) configContext.getProperty(ThrottleConstants.THROTTLE_INFO_KEY);
    if (dataHolder == null) {
        log.debug("Data holder not present in current Configuration Context");
        synchronized (configContext) {
            dataHolder = (ThrottleDataHolder) configContext.getProperty(ThrottleConstants.THROTTLE_INFO_KEY);
            if (dataHolder == null) {
                dataHolder = new ThrottleDataHolder();
                configContext.setNonReplicableProperty(ThrottleConstants.THROTTLE_INFO_KEY, dataHolder);
            }
        }
    }
    // initializes whether clustering is enabled an Env. level
    ClusteringAgent clusteringAgent = configContext.getAxisConfiguration().getClusteringAgent();
    if (clusteringAgent != null) {
        isClusteringEnable = true;
    }
    // static policy initialization
    if (inLinePolicy != null) {
        log.debug("Initializing using static throttling policy : " + inLinePolicy);
        try {
            throttle = ThrottleFactory.createMediatorThrottle(PolicyEngine.getPolicy(inLinePolicy));
            if (throttle != null && concurrentAccessController == null) {
                concurrentAccessController = throttle.getConcurrentAccessController();
                if (concurrentAccessController != null) {
                    dataHolder.setConcurrentAccessController(key, concurrentAccessController);
                }
            }
        } catch (ThrottleException e) {
            handleException("Error processing the throttling policy", e, null);
        }
    }
    // access rate controller initialization
    accessControler = new AccessRateController();
    // replicator for global concurrent state maintenance
    if (isClusteringEnable) {
        concurrentAccessReplicator = new ConcurrentAccessReplicator(configContext);
    }
}

Example 4 with ConcurrentAccessReplicator

use of org.apache.synapse.commons.throttle.core.ConcurrentAccessReplicator in project wso2-synapse by wso2.

the class Axis2Sender method handleConcurrentThrottleCount.

/**
 * handles the concurrent access limits
 *
 * @param smc SynapseMessageContext
 */
private static void handleConcurrentThrottleCount(org.apache.synapse.MessageContext smc) {
    Boolean isConcurrencyThrottleEnabled = (Boolean) smc.getProperty(SynapseConstants.SYNAPSE_CONCURRENCY_THROTTLE);
    Boolean isAccessAllowed = (Boolean) smc.getProperty(SynapseConstants.SYNAPSE_IS_CONCURRENT_ACCESS_ALLOWED);
    if (isAccessAllowed != null && isAccessAllowed && isConcurrencyThrottleEnabled != null && isConcurrencyThrottleEnabled) {
        ConcurrentAccessController concurrentAccessController = (ConcurrentAccessController) smc.getProperty(SynapseConstants.SYNAPSE_CONCURRENT_ACCESS_CONTROLLER);
        int available = concurrentAccessController.incrementAndGet();
        int concurrentLimit = concurrentAccessController.getLimit();
        if (log.isDebugEnabled()) {
            log.debug("Concurrency Throttle : Connection returned" + " :: " + available + " of available of " + concurrentLimit + " connections");
        }
        ConcurrentAccessReplicator concurrentAccessReplicator = (ConcurrentAccessReplicator) smc.getProperty(SynapseConstants.SYNAPSE_CONCURRENT_ACCESS_REPLICATOR);
        String throttleKey = (String) smc.getProperty(SynapseConstants.SYNAPSE_CONCURRENCY_THROTTLE_KEY);
        if (concurrentAccessReplicator != null) {
            concurrentAccessReplicator.replicate(throttleKey, true);
        }
    }
}

Example 5 with ConcurrentAccessReplicator

use of org.apache.synapse.commons.throttle.core.ConcurrentAccessReplicator in project wso2-synapse by wso2.

the class Axis2FlexibleMEPClient method send.

/**
 * Based on the Axis2 client code. Sends the Axis2 Message context out and returns
 * the Axis2 message context for the response.
 * <p/>
 * Here Synapse works as a Client to the service. It would expect 200 ok, 202 ok and
 * 500 internal server error as possible responses.
 *
 * @param endpoint                 the endpoint being sent to, maybe null
 * @param synapseOutMessageContext the outgoing synapse message
 * @throws AxisFault on errors
 */
public static void send(EndpointDefinition endpoint, org.apache.synapse.MessageContext synapseOutMessageContext) throws AxisFault {
    boolean separateListener = false;
    boolean wsSecurityEnabled = false;
    String wsSecPolicyKey = null;
    String inboundWsSecPolicyKey = null;
    String outboundWsSecPolicyKey = null;
    boolean wsRMEnabled = false;
    boolean wsAddressingEnabled = false;
    String wsAddressingVersion = null;
    if (endpoint != null) {
        separateListener = endpoint.isUseSeparateListener();
        wsSecurityEnabled = endpoint.isSecurityOn();
        wsSecPolicyKey = endpoint.getWsSecPolicyKey();
        inboundWsSecPolicyKey = endpoint.getInboundWsSecPolicyKey();
        outboundWsSecPolicyKey = endpoint.getOutboundWsSecPolicyKey();
        wsAddressingEnabled = endpoint.isAddressingOn();
        wsAddressingVersion = endpoint.getAddressingVersion();
    }
    if (log.isDebugEnabled()) {
        String to;
        if (endpoint != null && endpoint.getAddress() != null) {
            to = endpoint.getAddress(synapseOutMessageContext);
        } else {
            to = synapseOutMessageContext.getTo().toString();
        }
        log.debug("Sending [add = " + wsAddressingEnabled + "] [sec = " + wsSecurityEnabled + (endpoint != null ? "] [mtom = " + endpoint.isUseMTOM() + "] [swa = " + endpoint.isUseSwa() + "] [format = " + endpoint.getFormat() + "] [force soap11=" + endpoint.isForceSOAP11() + "] [force soap12=" + endpoint.isForceSOAP12() + "] [pox=" + endpoint.isForcePOX() + "] [get=" + endpoint.isForceGET() + "] [encoding=" + endpoint.getCharSetEncoding() : "") + "] [to=" + to + "]");
    }
    // save the original message context without altering it, so we can tie the response
    MessageContext originalInMsgCtx = ((Axis2MessageContext) synapseOutMessageContext).getAxis2MessageContext();
    // TODO Temp hack: ESB removes the session id from request in a random manner.
    Map headers = (Map) originalInMsgCtx.getProperty(MessageContext.TRANSPORT_HEADERS);
    String session = (String) synapseOutMessageContext.getProperty("LB_COOKIE_HEADER");
    if (session != null) {
        headers.put("Cookie", session);
    }
    // create a new MessageContext to be sent out as this should not corrupt the original
    // we need to create the response to the original message later on
    String preserveAddressingProperty = (String) synapseOutMessageContext.getProperty(SynapseConstants.PRESERVE_WS_ADDRESSING);
    MessageContext axisOutMsgCtx = cloneForSend(originalInMsgCtx, preserveAddressingProperty);
    if (log.isDebugEnabled()) {
        log.debug("Message [Original Request Message ID : " + synapseOutMessageContext.getMessageID() + "]" + " [New Cloned Request Message ID : " + axisOutMsgCtx.getMessageID() + "]");
    }
    // so that we can use the original message context for resending through different endpoints
    if (endpoint != null) {
        // get the endpoint encoding attribute
        String strCharSetEncoding = "";
        if (endpoint.getCharSetEncoding() != null) {
            strCharSetEncoding = ";" + endpoint.getCharSetEncoding();
        }
        if (SynapseConstants.FORMAT_POX.equals(endpoint.getFormat())) {
            axisOutMsgCtx.setDoingREST(true);
            axisOutMsgCtx.setProperty(org.apache.axis2.Constants.Configuration.MESSAGE_TYPE, org.apache.axis2.transport.http.HTTPConstants.MEDIA_TYPE_APPLICATION_XML);
            axisOutMsgCtx.setProperty(Constants.Configuration.CONTENT_TYPE, org.apache.axis2.transport.http.HTTPConstants.MEDIA_TYPE_APPLICATION_XML);
            Object o = axisOutMsgCtx.getProperty(org.apache.axis2.context.MessageContext.TRANSPORT_HEADERS);
            Map _headers = (Map) o;
            if (_headers != null) {
                _headers.remove(HTTP.CONTENT_TYPE);
                _headers.put(HTTP.CONTENT_TYPE, org.apache.axis2.transport.http.HTTPConstants.MEDIA_TYPE_APPLICATION_XML + strCharSetEncoding);
            }
        } else if (SynapseConstants.FORMAT_GET.equals(endpoint.getFormat())) {
            axisOutMsgCtx.setDoingREST(true);
            axisOutMsgCtx.setProperty(Constants.Configuration.HTTP_METHOD, Constants.Configuration.HTTP_METHOD_GET);
            axisOutMsgCtx.setProperty(org.apache.axis2.Constants.Configuration.MESSAGE_TYPE, org.apache.axis2.transport.http.HTTPConstants.MEDIA_TYPE_X_WWW_FORM);
        } else if (SynapseConstants.FORMAT_SOAP11.equals(endpoint.getFormat())) {
            axisOutMsgCtx.setDoingREST(false);
            axisOutMsgCtx.removeProperty(org.apache.axis2.Constants.Configuration.MESSAGE_TYPE);
            // We need to set this explicitly here in case the request was not a POST
            axisOutMsgCtx.setProperty(Constants.Configuration.HTTP_METHOD, Constants.Configuration.HTTP_METHOD_POST);
            if (axisOutMsgCtx.getSoapAction() == null && axisOutMsgCtx.getWSAAction() != null) {
                axisOutMsgCtx.setSoapAction(axisOutMsgCtx.getWSAAction());
            }
            if (!axisOutMsgCtx.isSOAP11()) {
                SOAPUtils.convertSOAP12toSOAP11(axisOutMsgCtx);
            }
            Object o = axisOutMsgCtx.getProperty(org.apache.axis2.context.MessageContext.TRANSPORT_HEADERS);
            Map transportHeaders = (Map) o;
            if (transportHeaders != null) {
                // Fix ESBJAVA-3645 Should not do this for multipart/related
                String trpContentType = (String) transportHeaders.get(HTTP.CONTENT_TYPE);
                // if content type is not found, setting the content type
                if (trpContentType == null) {
                    transportHeaders.put(HTTP.CONTENT_TYPE, org.apache.axis2.transport.http.HTTPConstants.MEDIA_TYPE_TEXT_XML + strCharSetEncoding);
                } else if (!trpContentType.contains(PassThroughConstants.CONTENT_TYPE_MULTIPART_RELATED)) {
                    transportHeaders.remove(HTTP.CONTENT_TYPE);
                    try {
                        // ESBJAVA-3447, Appending charset, if exist in property
                        ContentType contentType = new ContentType(trpContentType);
                        if (contentType.getParameter(HTTPConstants.CHAR_SET_ENCODING) != null) {
                            strCharSetEncoding = "; charset=" + contentType.getParameter(HTTPConstants.CHAR_SET_ENCODING);
                        }
                    } catch (ParseException e) {
                        log.warn("Error occurred while parsing ContentType header, using default: " + HTTPConstants.MEDIA_TYPE_TEXT_XML);
                    }
                    transportHeaders.put(HTTP.CONTENT_TYPE, org.apache.axis2.transport.http.HTTPConstants.MEDIA_TYPE_TEXT_XML + strCharSetEncoding);
                }
            }
        } else if (SynapseConstants.FORMAT_SOAP12.equals(endpoint.getFormat())) {
            axisOutMsgCtx.setDoingREST(false);
            axisOutMsgCtx.removeProperty(org.apache.axis2.Constants.Configuration.MESSAGE_TYPE);
            // We need to set this explicitly here in case the request was not a POST
            axisOutMsgCtx.setProperty(Constants.Configuration.HTTP_METHOD, Constants.Configuration.HTTP_METHOD_POST);
            if (axisOutMsgCtx.getSoapAction() == null && axisOutMsgCtx.getWSAAction() != null) {
                axisOutMsgCtx.setSoapAction(axisOutMsgCtx.getWSAAction());
            }
            if (axisOutMsgCtx.isSOAP11()) {
                SOAPUtils.convertSOAP11toSOAP12(axisOutMsgCtx);
            }
            Object o = axisOutMsgCtx.getProperty(org.apache.axis2.context.MessageContext.TRANSPORT_HEADERS);
            Map transportHeaders = (Map) o;
            if (transportHeaders != null) {
                // Fix ESBJAVA-3645 Should not do this for multipart/related
                String trpContentType = (String) transportHeaders.get(HTTP.CONTENT_TYPE);
                // if content type is not found, setting the content type
                if (trpContentType == null) {
                    transportHeaders.put(HTTP.CONTENT_TYPE, org.apache.axis2.transport.http.HTTPConstants.MEDIA_TYPE_APPLICATION_SOAP_XML + strCharSetEncoding);
                } else if (!trpContentType.contains(PassThroughConstants.CONTENT_TYPE_MULTIPART_RELATED)) {
                    transportHeaders.remove(HTTP.CONTENT_TYPE);
                    try {
                        // ESBJAVA-3447, Appending charset, if exist in property
                        ContentType contentType = new ContentType(trpContentType);
                        if (contentType.getParameter(HTTPConstants.CHAR_SET_ENCODING) != null) {
                            strCharSetEncoding = "; charset=" + contentType.getParameter(HTTPConstants.CHAR_SET_ENCODING);
                        }
                    } catch (ParseException e) {
                        log.warn("Error occurred while parsing ContentType header in property, using default: " + HTTPConstants.MEDIA_TYPE_APPLICATION_SOAP_XML);
                    }
                    if (axisOutMsgCtx.getSoapAction() != null) {
                        String actionHeaderPrefix = ";action=\"";
                        String contentTypeWithAction = new StringBuilder(org.apache.axis2.transport.http.HTTPConstants.MEDIA_TYPE_APPLICATION_SOAP_XML.length() + axisOutMsgCtx.getSoapAction().length() + actionHeaderPrefix.length() + 1).append(org.apache.axis2.transport.http.HTTPConstants.MEDIA_TYPE_APPLICATION_SOAP_XML).append(actionHeaderPrefix).append(axisOutMsgCtx.getSoapAction()).append('\"').toString();
                        transportHeaders.put(HTTP.CONTENT_TYPE, contentTypeWithAction + strCharSetEncoding);
                    } else {
                        transportHeaders.put(HTTP.CONTENT_TYPE, org.apache.axis2.transport.http.HTTPConstants.MEDIA_TYPE_APPLICATION_SOAP_XML + strCharSetEncoding);
                    }
                }
            }
        } else if (SynapseConstants.FORMAT_REST.equals(endpoint.getFormat())) {
            /* Remove Message Type  for GET and DELETE Request */
            if (originalInMsgCtx.getProperty(Constants.Configuration.HTTP_METHOD) != null) {
                if (originalInMsgCtx.getProperty(Constants.Configuration.HTTP_METHOD).toString().equals(Constants.Configuration.HTTP_METHOD_GET) || originalInMsgCtx.getProperty(Constants.Configuration.HTTP_METHOD).toString().equals(Constants.Configuration.HTTP_METHOD_DELETE)) {
                    axisOutMsgCtx.removeProperty(org.apache.axis2.Constants.Configuration.MESSAGE_TYPE);
                }
            }
            axisOutMsgCtx.setDoingREST(true);
        } else {
            processWSDL2RESTRequestMessageType(originalInMsgCtx, axisOutMsgCtx);
        }
        if (endpoint.isUseMTOM()) {
            axisOutMsgCtx.setDoingMTOM(true);
            // fix / workaround for AXIS2-1798
            axisOutMsgCtx.setProperty(org.apache.axis2.Constants.Configuration.ENABLE_MTOM, org.apache.axis2.Constants.VALUE_TRUE);
            axisOutMsgCtx.setDoingMTOM(true);
        } else if (endpoint.isUseSwa()) {
            axisOutMsgCtx.setDoingSwA(true);
            // fix / workaround for AXIS2-1798
            axisOutMsgCtx.setProperty(org.apache.axis2.Constants.Configuration.ENABLE_SWA, org.apache.axis2.Constants.VALUE_TRUE);
            axisOutMsgCtx.setDoingSwA(true);
        }
        if (endpoint.getCharSetEncoding() != null) {
            axisOutMsgCtx.setProperty(Constants.Configuration.CHARACTER_SET_ENCODING, endpoint.getCharSetEncoding());
        }
        // HTTP Endpoint : use the specified HTTP method and remove REST_URL_POSTFIX, it's not supported in HTTP Endpoint
        if (endpoint.isHTTPEndpoint()) {
            axisOutMsgCtx.setProperty(Constants.Configuration.HTTP_METHOD, synapseOutMessageContext.getProperty(Constants.Configuration.HTTP_METHOD));
            axisOutMsgCtx.removeProperty(NhttpConstants.REST_URL_POSTFIX);
        }
        // add rest request' suffix URI
        String restSuffix = (String) axisOutMsgCtx.getProperty(NhttpConstants.REST_URL_POSTFIX);
        boolean isRest = SynapseConstants.FORMAT_REST.equals(endpoint.getFormat());
        if (!isRest && !endpoint.isForceSOAP11() && !endpoint.isForceSOAP12()) {
            isRest = isRequestRest(originalInMsgCtx);
        }
        if (endpoint.getAddress() != null) {
            String address = endpoint.getAddress(synapseOutMessageContext);
            if (isRest && restSuffix != null && !"".equals(restSuffix)) {
                String url = "";
                if (!address.endsWith("/") && !restSuffix.startsWith("/") && !restSuffix.startsWith("?")) {
                    url = address + "/" + restSuffix;
                } else if (address.endsWith("/") && restSuffix.startsWith("/")) {
                    url = address + restSuffix.substring(1);
                } else if (address.endsWith("/") && restSuffix.startsWith("?")) {
                    url = address.substring(0, address.length() - 1) + restSuffix;
                } else {
                    if (!address.startsWith("jms")) {
                        url = address + restSuffix;
                    } else {
                        url = address;
                    }
                }
                axisOutMsgCtx.setTo(new EndpointReference(url));
            } else {
                axisOutMsgCtx.setTo(new EndpointReference(address));
            }
            axisOutMsgCtx.setProperty(NhttpConstants.ENDPOINT_PREFIX, address);
            synapseOutMessageContext.setProperty(SynapseConstants.ENDPOINT_PREFIX, address);
        } else {
            // Supporting RESTful invocation
            if (isRest && restSuffix != null && !"".equals(restSuffix)) {
                EndpointReference epr = axisOutMsgCtx.getTo();
                if (epr != null) {
                    String address = epr.getAddress();
                    String url;
                    if (!address.endsWith("/") && !restSuffix.startsWith("/") && !restSuffix.startsWith("?")) {
                        url = address + "/" + restSuffix;
                    } else {
                        url = address + restSuffix;
                    }
                    axisOutMsgCtx.setTo(new EndpointReference(url));
                }
            }
        }
        if (endpoint.isUseSeparateListener()) {
            axisOutMsgCtx.getOptions().setUseSeparateListener(true);
        }
    } else {
        processWSDL2RESTRequestMessageType(originalInMsgCtx, axisOutMsgCtx);
    }
    // only put whttp:location for the REST (GET) requests, otherwise causes issues for POX messages
    if (axisOutMsgCtx.isDoingREST() && HTTPConstants.MEDIA_TYPE_X_WWW_FORM.equals(axisOutMsgCtx.getProperty(Constants.Configuration.MESSAGE_TYPE))) {
        if (axisOutMsgCtx.getProperty(WSDL2Constants.ATTR_WHTTP_LOCATION) == null && axisOutMsgCtx.getEnvelope().getBody().getFirstElement() != null) {
            axisOutMsgCtx.setProperty(WSDL2Constants.ATTR_WHTTP_LOCATION, axisOutMsgCtx.getEnvelope().getBody().getFirstElement().getQName().getLocalPart());
        }
    }
    if (wsAddressingEnabled) {
        if (wsAddressingVersion != null && SynapseConstants.ADDRESSING_VERSION_SUBMISSION.equals(wsAddressingVersion)) {
            axisOutMsgCtx.setProperty(AddressingConstants.WS_ADDRESSING_VERSION, AddressingConstants.Submission.WSA_NAMESPACE);
        } else if (wsAddressingVersion != null && SynapseConstants.ADDRESSING_VERSION_FINAL.equals(wsAddressingVersion)) {
            axisOutMsgCtx.setProperty(AddressingConstants.WS_ADDRESSING_VERSION, AddressingConstants.Final.WSA_NAMESPACE);
        }
        axisOutMsgCtx.setProperty(AddressingConstants.DISABLE_ADDRESSING_FOR_OUT_MESSAGES, Boolean.FALSE);
    } else {
        axisOutMsgCtx.setProperty(AddressingConstants.DISABLE_ADDRESSING_FOR_OUT_MESSAGES, Boolean.TRUE);
    }
    // remove the headers if we don't need to preserve them.
    // determine weather we need to preserve the processed headers
    String preserveHeaderProperty = (String) synapseOutMessageContext.getProperty(SynapseConstants.PRESERVE_PROCESSED_HEADERS);
    if (preserveHeaderProperty == null || !Boolean.parseBoolean(preserveHeaderProperty)) {
        // default behaviour is to remove the headers
        MessageHelper.removeProcessedHeaders(axisOutMsgCtx, (preserveAddressingProperty != null && Boolean.parseBoolean(preserveAddressingProperty)));
    }
    ConfigurationContext axisCfgCtx = axisOutMsgCtx.getConfigurationContext();
    AxisConfiguration axisCfg = axisCfgCtx.getAxisConfiguration();
    AxisService anoymousService = AnonymousServiceFactory.getAnonymousService(synapseOutMessageContext.getConfiguration(), axisCfg, wsAddressingEnabled, wsRMEnabled, wsSecurityEnabled);
    // mark the anon services created to be used in the client side of synapse as hidden
    // from the server side of synapse point of view
    anoymousService.getParent().addParameter(SynapseConstants.HIDDEN_SERVICE_PARAM, "true");
    ServiceGroupContext sgc = new ServiceGroupContext(axisCfgCtx, (AxisServiceGroup) anoymousService.getParent());
    ServiceContext serviceCtx = sgc.getServiceContext(anoymousService);
    boolean outOnlyMessage = "true".equals(synapseOutMessageContext.getProperty(SynapseConstants.OUT_ONLY));
    // get a reference to the DYNAMIC operation of the Anonymous Axis2 service
    AxisOperation axisAnonymousOperation = anoymousService.getOperation(outOnlyMessage ? new QName(AnonymousServiceFactory.OUT_ONLY_OPERATION) : new QName(AnonymousServiceFactory.OUT_IN_OPERATION));
    Options clientOptions = MessageHelper.cloneOptions(originalInMsgCtx.getOptions());
    clientOptions.setUseSeparateListener(separateListener);
    // if security is enabled,
    if (wsSecurityEnabled) {
        // if a WS-Sec policy is specified, use it
        if (wsSecPolicyKey != null) {
            if (endpoint.isDynamicPolicy()) {
                wsSecPolicyKey = endpoint.evaluateDynamicEndpointSecurityPolicy(synapseOutMessageContext);
            }
            clientOptions.setProperty(SynapseConstants.RAMPART_POLICY, MessageHelper.getPolicy(synapseOutMessageContext, wsSecPolicyKey));
        } else {
            if (inboundWsSecPolicyKey != null) {
                clientOptions.setProperty(SynapseConstants.RAMPART_IN_POLICY, MessageHelper.getPolicy(synapseOutMessageContext, inboundWsSecPolicyKey));
            }
            if (outboundWsSecPolicyKey != null) {
                clientOptions.setProperty(SynapseConstants.RAMPART_OUT_POLICY, MessageHelper.getPolicy(synapseOutMessageContext, outboundWsSecPolicyKey));
            }
        }
        // temporary workaround for https://issues.apache.org/jira/browse/WSCOMMONS-197
        if (axisOutMsgCtx.getEnvelope().getHeader() == null) {
            SOAPFactory fac = axisOutMsgCtx.isSOAP11() ? OMAbstractFactory.getSOAP11Factory() : OMAbstractFactory.getSOAP12Factory();
            fac.createSOAPHeader(axisOutMsgCtx.getEnvelope());
        }
    }
    OperationClient mepClient = axisAnonymousOperation.createClient(serviceCtx, clientOptions);
    mepClient.addMessageContext(axisOutMsgCtx);
    axisOutMsgCtx.setAxisMessage(axisAnonymousOperation.getMessage(WSDLConstants.MESSAGE_LABEL_OUT_VALUE));
    // set the SEND_TIMEOUT for transport sender
    if (endpoint != null && endpoint.getEffectiveTimeout() > 0) {
        if (!endpoint.isDynamicTimeoutEndpoint()) {
            axisOutMsgCtx.setProperty(SynapseConstants.SEND_TIMEOUT, endpoint.getEffectiveTimeout());
        } else {
            axisOutMsgCtx.setProperty(SynapseConstants.SEND_TIMEOUT, endpoint.evaluateDynamicEndpointTimeout(synapseOutMessageContext));
        }
    }
    // always set a callback as we decide if the send it blocking or non blocking within
    // the MEP client. This does not cause an overhead, as we simply create a 'holder'
    // object with a reference to the outgoing synapse message context
    // synapseOutMessageContext
    AsyncCallback callback = new AsyncCallback(axisOutMsgCtx, synapseOutMessageContext);
    if (!outOnlyMessage) {
        if (endpoint != null) {
            // TimeoutHandler can detect timed out callbacks and take appropriate action.
            if (!endpoint.isDynamicTimeoutEndpoint()) {
                long endpointTimeout = endpoint.getEffectiveTimeout();
                callback.setTimeout(endpointTimeout);
                callback.setTimeOutAction(endpoint.getTimeoutAction());
                callback.setTimeoutType(endpoint.getEndpointTimeoutType());
                if (log.isDebugEnabled()) {
                    log.debug("Setting Timeout for endpoint : " + getEndpointLogMessage(synapseOutMessageContext, axisOutMsgCtx) + " to static timeout value : " + endpointTimeout);
                }
            } else {
                long endpointTimeout = endpoint.evaluateDynamicEndpointTimeout(synapseOutMessageContext);
                callback.setTimeout(endpointTimeout);
                callback.setTimeOutAction(endpoint.getTimeoutAction());
                callback.setTimeoutType(endpoint.getEndpointTimeoutType());
                if (log.isDebugEnabled()) {
                    log.debug("Setting Timeout for endpoint : " + getEndpointLogMessage(synapseOutMessageContext, axisOutMsgCtx) + " to dynamic timeout value : " + endpointTimeout);
                }
            }
        } else {
            long globalTimeout = synapseOutMessageContext.getEnvironment().getGlobalTimeout();
            callback.setTimeout(globalTimeout);
            callback.setTimeoutType(SynapseConstants.ENDPOINT_TIMEOUT_TYPE.GLOBAL_TIMEOUT);
            if (log.isDebugEnabled()) {
                log.debug("Setting timeout for implicit endpoint : " + getEndpointLogMessage(synapseOutMessageContext, axisOutMsgCtx) + " to global timeout value of " + globalTimeout);
            }
        }
    }
    mepClient.setCallback(callback);
    // HTTP 1.1 messages and HTTP 1.0 require the whole message to caculate the content length
    if (originalInMsgCtx.isPropertyTrue(NhttpConstants.FORCE_HTTP_1_0)) {
        synapseOutMessageContext.getEnvelope().toString();
    }
    // with the nio transport, this causes the listener not to write a 202
    // Accepted response, as this implies that Synapse does not yet know if
    // a 202 or 200 response would be written back.
    originalInMsgCtx.getOperationContext().setProperty(org.apache.axis2.Constants.RESPONSE_WRITTEN, "SKIP");
    // if the transport out is explicitly set use it
    Object o = originalInMsgCtx.getProperty("TRANSPORT_OUT_DESCRIPTION");
    if (o != null && o instanceof TransportOutDescription) {
        axisOutMsgCtx.setTransportOut((TransportOutDescription) o);
        clientOptions.setTransportOut((TransportOutDescription) o);
        clientOptions.setProperty("TRANSPORT_OUT_DESCRIPTION", o);
    }
    // clear the message context properties related to endpoint in last service invocation
    Set keySet = synapseOutMessageContext.getPropertyKeySet();
    if (keySet != null) {
        keySet.remove(EndpointDefinition.DYNAMIC_URL_VALUE);
    }
    // throttling count for OUT_ONLY messages
    if (outOnlyMessage) {
        Boolean isConcurrencyThrottleEnabled = (Boolean) synapseOutMessageContext.getProperty(SynapseConstants.SYNAPSE_CONCURRENCY_THROTTLE);
        if (isConcurrencyThrottleEnabled != null && isConcurrencyThrottleEnabled) {
            ConcurrentAccessController concurrentAccessController = (ConcurrentAccessController) synapseOutMessageContext.getProperty(SynapseConstants.SYNAPSE_CONCURRENT_ACCESS_CONTROLLER);
            int available = concurrentAccessController.incrementAndGet();
            int concurrentLimit = concurrentAccessController.getLimit();
            if (log.isDebugEnabled()) {
                log.debug("Concurrency Throttle : Connection returned" + " :: " + available + " of available of " + concurrentLimit + " connections");
            }
            ConcurrentAccessReplicator concurrentAccessReplicator = (ConcurrentAccessReplicator) synapseOutMessageContext.getProperty(SynapseConstants.SYNAPSE_CONCURRENT_ACCESS_REPLICATOR);
            String throttleKey = (String) synapseOutMessageContext.getProperty(SynapseConstants.SYNAPSE_CONCURRENCY_THROTTLE_KEY);
            if (concurrentAccessReplicator != null) {
                concurrentAccessReplicator.replicate(throttleKey, true);
            }
        }
    }
    mepClient.execute(true);
}