Java MessageContext.getProperty方法代码示例

import org.apache.synapse.MessageContext; //导入方法依赖的package包/类
/**
 * Throw Synapse Exception for any exception in class mediator
 * so that the fault handler will be invoked
 *
 * @param ERROR_CODE
 * @param ERROR_MESSAGE
 * @param ERROR_DETAIL
 * @param context
 */
public static void handle(String ERROR_CODE, String ERROR_MESSAGE, String ERROR_DETAIL, MessageContext context) {

    int array[] = {20, 20, 40};
    int total = 0;
    try {
        for (int i = 5; i >= 0; i--) {
            total += array[i];
        }
    } catch (Exception e) {
        context.setProperty(ERROR_CODE, "AB005");
        context.setProperty(ERROR_MESSAGE, "Error Message from class CsvValidatorMediator");
        context.setProperty(ERROR_DETAIL, "Error Details from class");

        String messageContextErrorCode = (String) context.getProperty(ERROR_CODE);
        String messageContextErrorMessage = (String) context.getProperty(ERROR_MESSAGE);
        String messageContextErrorDetail = (String) context.getProperty(ERROR_DETAIL);
        String separator = "?";

        String concatenatedMessage = (messageContextErrorCode + separator + messageContextErrorMessage + separator + messageContextErrorDetail);
        throw new SynapseException(concatenatedMessage);
    }
}
 

import org.apache.synapse.MessageContext; //导入方法依赖的package包/类
public boolean mediate(MessageContext messageContext) {
    try {
        if (log.isDebugEnabled()) {
            log.debug("Response interceptor mediation started");
        }
        String clusterId = (String) messageContext.getProperty(LoadBalancerConstants.CLUSTER_ID);
        if (StringUtils.isNotBlank(clusterId)) {
            FutureTask<Object> task = new FutureTask<Object>(new InFlightRequestDecrementCallable(clusterId));
            LoadBalancerStatisticsExecutor.getInstance().getService().submit(task);
        } else {
            if (log.isDebugEnabled()) {
                log.debug("Could not decrement in-flight request count : cluster id not found in message context");
            }
        }

    } catch (Exception e) {
        if (log.isErrorEnabled()) {
            log.error("Could not decrement in-flight request count", e);
        }
    }
    return true;
}
 

import org.apache.synapse.MessageContext; //导入方法依赖的package包/类
private void prepareEndPointSequence(MessageContext synCtx, Endpoint endpoint) {

        Object o = synCtx.getProperty(SynapseConstants.PROP_SAL_ENDPOINT_ENDPOINT_LIST);
        List<Endpoint> endpointList;
        if (o instanceof List) {
            endpointList = (List<Endpoint>) o;
            endpointList.add(this);

        } else {
            // this is the first endpoint in the hierarchy. so create the queue and
            // insert this as the first element.
            endpointList = new ArrayList<Endpoint>();
            endpointList.add(this);
            synCtx.setProperty(SynapseConstants.PROP_SAL_ENDPOINT_ENDPOINT_LIST, endpointList);
        }

        // if the next endpoint is not a session affinity one, endpoint sequence ends
        // here. but we have to add the next endpoint to the list.
        if (!(endpoint instanceof TenantAwareLoadBalanceEndpoint)) {
            endpointList.add(endpoint);
            // Clearing out if there any any session information with current message
            if (dispatcher.isServerInitiatedSession()) {
                dispatcher.removeSessionID(synCtx);
            }
        }
    }
 

import org.apache.synapse.MessageContext; //导入方法依赖的package包/类
private OMElement getOMElement(MessageContext messageContext, String location) {
    OMElement omElement = null;
    if (location.equals(Constants.RULE_SOURCE_SOAP_BODY)) {
        omElement = messageContext.getEnvelope().getBody().getFirstElement();
    } else if (location.equals(Constants.RULE_SOURCE_SOAP_HEADER)) {
        omElement = messageContext.getEnvelope().getHeader();
    } else if (location.startsWith(Constants.RULE_PROPERTY_PREFIX)) {
        // property name should have started with $ so remove it
        String propertyName = location.substring(1);
        if (messageContext.getProperty(propertyName) instanceof OMElement) {
            omElement = (OMElement) messageContext.getProperty(propertyName);
        } else if (messageContext.getProperty(propertyName) instanceof ArrayList) {
            ArrayList arrayList = (ArrayList) messageContext.getProperty(propertyName);
            //here we take the first OMElement
            omElement = (OMElement) arrayList.get(0);
        }
    } else {
        handleException("invalde source value " + location, messageContext);
    }
    return omElement;
}
 

import org.apache.synapse.MessageContext; //导入方法依赖的package包/类
private void incrementInFlightRequestCount(MessageContext messageContext) {
    try {
        String clusterId = (String) messageContext.getProperty(LoadBalancerConstants.CLUSTER_ID);
        if (StringUtils.isBlank(clusterId)) {
            throw new RuntimeException("Cluster id not found in message context");
        }
        FutureTask<Object> task = new FutureTask<Object>(new InFlightRequestIncrementCallable(clusterId));
        LoadBalancerStatisticsExecutor.getInstance().getService().submit(task);
    } catch (Exception e) {
        if (log.isDebugEnabled()) {
            log.debug("Could not increment in-flight request count", e);
        }
    }
}
 

import org.apache.synapse.MessageContext; //导入方法依赖的package包/类
private void decrementInFlightRequestCount(MessageContext messageContext) {
    try {
        String clusterId = (String) messageContext.getProperty(LoadBalancerConstants.CLUSTER_ID);
        if (StringUtils.isBlank(clusterId)) {
            throw new RuntimeException("Cluster id not found in message context");
        }
        FutureTask<Object> task = new FutureTask<Object>(new InFlightRequestDecrementCallable(clusterId));
        LoadBalancerStatisticsExecutor.getInstance().getService().submit(task);
    } catch (Exception e) {
        if (log.isDebugEnabled()) {
            log.debug("Could not decrement in-flight request count", e);
        }
    }
}
 

import org.apache.synapse.MessageContext; //导入方法依赖的package包/类
@Override
public void send(MessageContext synCtx) {
    SessionInformation sessionInformation = null;
    org.apache.axis2.clustering.Member currentMember = null;
    if (isSessionAffinityBasedLB()) {
        // Check existing session information
        sessionInformation = (SessionInformation) synCtx.getProperty(
                SynapseConstants.PROP_SAL_CURRENT_SESSION_INFORMATION);

        currentMember = (org.apache.axis2.clustering.Member) synCtx.getProperty(
                SynapseConstants.PROP_SAL_ENDPOINT_CURRENT_MEMBER);

        if (sessionInformation == null && currentMember == null) {
            sessionInformation = dispatcher.getSession(synCtx);
            if (sessionInformation != null) {
                if (log.isDebugEnabled()) {
                    log.debug(String.format("Existing session found: %s for request: %s", sessionInformation.getId(),
                            synCtx.getMessageID()));
                }

                currentMember = sessionInformation.getMember();
                synCtx.setProperty(SynapseConstants.PROP_SAL_ENDPOINT_CURRENT_MEMBER, currentMember);
                // This is for reliably recovery any session information if while response is getting ,
                // session information has been removed by cleaner.
                // This will not be a cost as session information is not a heavy data structure
                synCtx.setProperty(SynapseConstants.PROP_SAL_CURRENT_SESSION_INFORMATION, sessionInformation);
            }
        }

    }

    TenantAwareLoadBalanceFaultHandler faultHandler = new TenantAwareLoadBalanceFaultHandler();
    if (sessionInformation != null && currentMember != null) {
        // Update axis2 member ports
        updateAxis2MemberPorts(synCtx, currentMember);
        // Send request to the member with the existing session
        sessionInformation.updateExpiryTime();
        sendToApplicationMember(synCtx, currentMember, faultHandler, false);
    } else {
        // No existing session found
        // Find next member
        org.apache.axis2.clustering.Member axis2Member = findNextMember(synCtx);
        if (axis2Member != null) {
            // Send request to member
            sendToApplicationMember(synCtx, axis2Member, faultHandler, true);
        } else {
            throwSynapseException(synCtx, 404, "Active application instances not found");
        }
    }
}