Examples with HttpSessionDispatcher org.apache.synapse.endpoints.dispatch.HttpSessionDispatcher used on opensource projects

Example 6 with HttpSessionDispatcher

use of org.apache.synapse.endpoints.dispatch.HttpSessionDispatcher in project wso2-synapse by wso2.

the class ServiceDynamicLoadbalanceEndpointFactory method createEndpoint.

protected Endpoint createEndpoint(OMElement epConfig, boolean anonymousEndpoint, Properties properties) {
    OMElement loadbalanceElement = epConfig.getFirstChildWithName(new QName(SynapseConstants.SYNAPSE_NAMESPACE, "serviceDynamicLoadbalance"));
    if (loadbalanceElement == null) {
        return null;
    }
    String configuration = loadbalanceElement.getAttributeValue(new QName(XMLConfigConstants.NULL_NAMESPACE, "configuration"));
    OMElement servicesEle;
    if (configuration != null) {
        if (configuration.startsWith("$system:")) {
            configuration = System.getProperty(configuration.substring("$system:".length()));
        }
        // Load the file
        StAXOMBuilder builder = null;
        try {
            builder = new StAXOMBuilder(new URL(configuration).openStream());
        } catch (Exception e) {
            handleException("Could not load ServiceDynamicLoadbalanceEndpoint configuration file " + configuration);
        }
        servicesEle = builder.getDocumentElement().getFirstChildWithName(SERVICES_QNAME);
    } else {
        OMElement lbConfigEle = loadbalanceElement.getFirstChildWithName(LB_CONFIG_QNAME);
        if (lbConfigEle == null) {
            throw new RuntimeException("loadBalancerConfig element not found as a child of " + "serviceDynamicLoadbalance element");
        }
        servicesEle = lbConfigEle.getFirstChildWithName(SERVICES_QNAME);
    }
    if (servicesEle == null) {
        throw new RuntimeException("services element not found in serviceDynamicLoadbalance configuration");
    }
    Map<String, String> hostDomainMap = new HashMap<String, String>();
    for (Iterator<OMElement> iter = servicesEle.getChildrenWithLocalName("service"); iter.hasNext(); ) {
        OMElement serviceEle = iter.next();
        OMElement hostsEle = serviceEle.getFirstChildWithName(new QName(SynapseConstants.SYNAPSE_NAMESPACE, "hosts"));
        if (hostsEle == null) {
            throw new RuntimeException("hosts element not found as a child of service element");
        }
        List<String> hosts = new ArrayList<String>();
        for (Iterator<OMElement> hostIter = hostsEle.getChildrenWithLocalName("host"); hostIter.hasNext(); ) {
            OMElement hostEle = hostIter.next();
            String host = hostEle.getText();
            if (host.trim().length() == 0) {
                throw new RuntimeException("host cannot be null");
            }
            hosts.add(host);
        }
        OMElement domainEle = serviceEle.getFirstChildWithName(new QName(SynapseConstants.SYNAPSE_NAMESPACE, "domain"));
        if (domainEle == null) {
            throw new RuntimeException("domain element not found in as a child of services");
        }
        String domain = domainEle.getText();
        if (domain.trim().length() == 0) {
            throw new RuntimeException("domain cannot be null");
        }
        for (String host : hosts) {
            if (hostDomainMap.containsKey(host)) {
                throw new RuntimeException("host " + host + " has been already defined for " + "clustering domain " + hostDomainMap.get(host));
            }
            hostDomainMap.put(host, domain);
        }
    }
    if (hostDomainMap.isEmpty()) {
        throw new RuntimeException("No service elements defined under services");
    }
    LoadbalanceAlgorithm algorithm = LoadbalanceAlgorithmFactory.createLoadbalanceAlgorithm(loadbalanceElement, null);
    ServiceDynamicLoadbalanceEndpoint loadbalanceEndpoint = new ServiceDynamicLoadbalanceEndpoint(hostDomainMap, algorithm);
    // set endpoint name
    OMAttribute name = epConfig.getAttribute(new QName(XMLConfigConstants.NULL_NAMESPACE, "name"));
    if (name != null) {
        loadbalanceEndpoint.setName(name.getAttributeValue());
    }
    // get the session for this endpoint
    OMElement sessionElement = epConfig.getFirstChildWithName(new QName(SynapseConstants.SYNAPSE_NAMESPACE, "session"));
    if (sessionElement != null) {
        OMElement sessionTimeout = sessionElement.getFirstChildWithName(new QName(SynapseConstants.SYNAPSE_NAMESPACE, "sessionTimeout"));
        if (sessionTimeout != null) {
            try {
                loadbalanceEndpoint.setSessionTimeout(Long.parseLong(sessionTimeout.getText().trim()));
            } catch (NumberFormatException nfe) {
                handleException("Invalid session timeout value : " + sessionTimeout.getText());
            }
        }
        String type = sessionElement.getAttributeValue(new QName("type"));
        if (type.equalsIgnoreCase("soap")) {
            Dispatcher soapDispatcher = new SoapSessionDispatcher();
            loadbalanceEndpoint.setDispatcher(soapDispatcher);
        } else if (type.equalsIgnoreCase("http")) {
            Dispatcher httpDispatcher = new HttpSessionDispatcher();
            loadbalanceEndpoint.setDispatcher(httpDispatcher);
        }
        loadbalanceEndpoint.setSessionAffinity(true);
    }
    loadbalanceEndpoint.setFailover(false);
    return loadbalanceEndpoint;
}

Example 7 with HttpSessionDispatcher

use of org.apache.synapse.endpoints.dispatch.HttpSessionDispatcher in project wso2-synapse by wso2.

the class SALoadbalanceEndpoint method sendMessage.

public void sendMessage(MessageContext synCtx) {
    logSetter();
    if (log.isDebugEnabled()) {
        log.debug("Start : Session Affinity Load-balance Endpoint " + getName());
    }
    if (getContext().isState(EndpointContext.ST_OFF)) {
        informFailure(synCtx, SynapseConstants.ENDPOINT_LB_NONE_READY, "Loadbalance endpoint : " + getName() != null ? getName() : SynapseConstants.ANONYMOUS_ENDPOINT + " - is inactive");
        return;
    }
    // first check if this session is associated with a session. if so, get the endpoint
    // associated for that session.
    SessionInformation sessionInformation = (SessionInformation) synCtx.getProperty(SynapseConstants.PROP_SAL_CURRENT_SESSION_INFORMATION);
    List<Endpoint> endpoints = (List<Endpoint>) synCtx.getProperty(SynapseConstants.PROP_SAL_ENDPOINT_CURRENT_ENDPOINT_LIST);
    if (!(dispatcher instanceof HttpSessionDispatcher)) {
        try {
            RelayUtils.buildMessage(((Axis2MessageContext) synCtx).getAxis2MessageContext(), false);
        } catch (Exception e) {
            handleException("Error while building message", e);
        }
    }
    // evaluate the properties
    evaluateProperties(synCtx);
    if (sessionInformation == null && endpoints == null) {
        sessionInformation = dispatcher.getSession(synCtx);
        if (sessionInformation != null) {
            if (log.isDebugEnabled()) {
                log.debug("Current session id : " + sessionInformation.getId());
            }
            endpoints = dispatcher.getEndpoints(sessionInformation);
            if (log.isDebugEnabled()) {
                log.debug("Endpoint sequence (path) on current session : " + this + endpoints);
            }
            synCtx.setProperty(SynapseConstants.PROP_SAL_ENDPOINT_CURRENT_ENDPOINT_LIST, endpoints);
            // 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 a not heavy data structure
            synCtx.setProperty(SynapseConstants.PROP_SAL_CURRENT_SESSION_INFORMATION, sessionInformation);
        }
    }
    if (sessionInformation != null && endpoints != null) {
        // send message on current session
        sendMessageOnCurrentSession(sessionInformation.getId(), endpoints, synCtx);
    } else {
        // prepare for a new session
        sendMessageOnNewSession(synCtx);
    }
}