Examples of org.apache.synapse.endpoints.LoadbalanceEndpoint

org.apache.synapse.endpoints.LoadbalanceEndpoint
A Load balance endpoint contains multiple child endpoints. It routes messages according to the specified load balancing algorithm. This will assume that all immediate child endpoints are identical in state (state is replicated) or state is not maintained at those endpoints. If an endpoint is failing, the failed endpoint is marked as inactive and the message sent to the next endpoint obtained using the load balancing algorithm. If all the endpoints have failed and a parent endpoint is available, onChildEndpointFail(...) method of parent endpoint is called. If a parent is not available, this will call next FaultHandler for the message context.

                out.addChild(new SendMediator());
                mainSeq.addChild(in);
                mainSeq.addChild(out);


                SendMediator send = new SendMediator();
                LoadbalanceEndpoint lb = new LoadbalanceEndpoint();


                FilterMediator filterMediator = new FilterMediator();
                in.addChild(filterMediator);
                SynapseXPath xpath = new SynapseXPath("get-property('To')");
                filterMediator.setSource(xpath);
                filterMediator.setRegex(Pattern.compile("/carbon"));


                PropertyMediator httpSCProperty = new PropertyMediator();
                httpSCProperty.setName("HTTP_SC");
                httpSCProperty.setScope("axis2");
                httpSCProperty.setValue("302");


                PropertyMediator locationHeader = new PropertyMediator();
                locationHeader.setName("Location");
                locationHeader.setScope("transport");
                locationHeader.setValue(getMasterHttpsEndpoint(PortSelector.normalEndpointList));


                PropertyMediator responseProperty = new PropertyMediator();
                responseProperty.setName(SynapseConstants.RESPONSE);
                responseProperty.setValue("true");


                HeaderMediator headerMediator = new HeaderMediator();
                headerMediator.setQName(new QName("To"));
                headerMediator.setAction(1);


                SendMediator sendMediator = new SendMediator();
                DropMediator dropMediator = new DropMediator();


                filterMediator.addChild(locationHeader);
                filterMediator.addChild(httpSCProperty);
                filterMediator.addChild(responseProperty);
                filterMediator.addChild(headerMediator);
                filterMediator.addChild(sendMediator);
                filterMediator.addChild(dropMediator);


                AnonymousListMediator elseMediator = new AnonymousListMediator();
                filterMediator.setElseMediator(elseMediator);
                elseMediator.addChild(new LogMediator());
                elseMediator.addChild(send);
                /* if there are ncew endpoints we are removing the current sequence */
                RoundRobin algorithm = new RoundRobin(childEndpoints);
                lb.setAlgorithm(algorithm);
                /* adding all the endpoints started since the current main sequence is removing */
                if(!"set".equals(System.getProperty("lb.disable"))){
                    lb.setMembers(new ArrayList<Member>(addedEndpointList.values()));
                }
                send.setEndpoint(lb);
                //in.addChild(send);
                synCfg.addSequence(mainSeq.getName(), mainSeq);
                if(!"set".equals(System.getProperty("lb.disable"))){

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        initEndpoint(endpoint2, null);


        synapseConfig.addEndpoint(endpoint1.getName(), endpoint1);
        synapseConfig.addEndpoint(endpoint2.getName(), endpoint2);


        LoadbalanceEndpoint lb = new LoadbalanceEndpoint();
        lb.setName("lb");
        lb.setDefinition(new EndpointDefinition());


        IndirectEndpoint child1 = new IndirectEndpoint();
        child1.setKey(endpoint1.getName());
        IndirectEndpoint child2 = new IndirectEndpoint();
        child2.setKey(endpoint2.getName());
        Endpoint child3 = createEndpoint("baz");


        List<Endpoint> children = new ArrayList<Endpoint>();
        children.add(child1);
        children.add(child2);
        children.add(child3);
        lb.setChildren(children);


        synapseConfig.addEndpoint(lb.getName(), lb);
        assertDependency(ConfigurationObject.TYPE_ENDPOINT, child1.getKey(), lb.getName());
        assertDependency(ConfigurationObject.TYPE_ENDPOINT, child2.getKey(), lb.getName());
        assertNoDependency(ConfigurationObject.TYPE_ENDPOINT, child3.getName());
    }

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        SendMediator send2 = (SendMediator) factory.createMediator(config2);


        assertTrue("Top level endpoint should be a load balance endpoint.",
                send2.getEndpoint() instanceof LoadbalanceEndpoint);


        LoadbalanceEndpoint endpoint = (LoadbalanceEndpoint) send2.getEndpoint();
        List addresses = endpoint.getEndpoints();
        assertEquals("There should be 3 leaf level address endpoints", addresses.size(), 3);


        assertTrue("Leaf level endpoints should be address endpoints",
                addresses.get(0) instanceof AddressEndpoint);
        assertTrue("Leaf level endpoints should be address endpoints",

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        SendMediator send2 = (SendMediator) factory.createMediator(config2);


        assertTrue("Top level endpoint should be a load balance endpoint.",
                send2.getEndpoint() instanceof LoadbalanceEndpoint);


        LoadbalanceEndpoint loadbalanceEndpoint = (LoadbalanceEndpoint) send2.getEndpoint();


        List children = loadbalanceEndpoint.getEndpoints();
        assertEquals("Top level endpoint should have 2 child endpoints.", children.size(), 2);


        assertTrue("First child should be a address endpoint",
                children.get(0) instanceof AddressEndpoint);

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        loadbalanceElement = epConfig.getFirstChildWithName
                (new QName(Constants.SYNAPSE_NAMESPACE, "loadbalance"));


        if(loadbalanceElement != null) {


            LoadbalanceEndpoint loadbalanceEndpoint = new LoadbalanceEndpoint();


            // set endpoint name
            OMAttribute name = epConfig.getAttribute(new QName(
                    org.apache.synapse.config.xml.Constants.NULL_NAMESPACE, "name"));


            if (name != null) {
                loadbalanceEndpoint.setName(name.getAttributeValue());
            }


            // set endpoints
            ArrayList endpoints = getEndpoints(loadbalanceElement, loadbalanceEndpoint);
            loadbalanceEndpoint.setEndpoints(endpoints);


            // set load balance algorithm
            LoadbalanceAlgorithm algorithm = LoadbalanceAlgorithmFactory.
                    createLoadbalanceAlgorithm(loadbalanceElement, endpoints);
            loadbalanceEndpoint.setAlgorithm(algorithm);


            // set if failover is turned off
            String failover = loadbalanceElement.getAttributeValue(new QName("failover"));
            if (failover != null && failover.equalsIgnoreCase("false")) {
                loadbalanceEndpoint.setFailover(false);
            }


            return loadbalanceEndpoint;
        }

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        }


        fac = OMAbstractFactory.getOMFactory();
        OMElement endpointElement = fac.createOMElement("endpoint", Constants.SYNAPSE_OMNAMESPACE);


        LoadbalanceEndpoint loadbalanceEndpoint = (LoadbalanceEndpoint) endpoint;


        String name = loadbalanceEndpoint.getName();
        if (name != null) {
            endpointElement.addAttribute("name", name, null);
        }


        OMElement loadbalanceElement = fac.createOMElement("loadbalance", Constants.SYNAPSE_OMNAMESPACE);
        endpointElement.addChild(loadbalanceElement);


        LoadbalanceAlgorithm algorithm = loadbalanceEndpoint.getAlgorithm();
        String algorithmName = "roundRobin";
        if (algorithm instanceof RoundRobin) {
             algorithmName = "roundRobin";
        }
        loadbalanceElement.addAttribute
                (org.apache.synapse.config.xml.Constants.ALGORITHM_NAME, algorithmName, null);


        // set if failover is turned off in the endpoint
        if (!loadbalanceEndpoint.isFailover()) {
            loadbalanceElement.addAttribute("failover", "false", null);
        }


        List endpoints = loadbalanceEndpoint.getEndpoints();
        for (int i = 0; i < endpoints.size(); i++) {
            Endpoint childEndpoint = (Endpoint) endpoints.get(i);
            EndpointSerializer serializer = EndpointAbstractSerializer.
                    getEndpointSerializer(childEndpoint);
            OMElement aeElement = serializer.serializeEndpoint(childEndpoint);

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        }


        fac = OMAbstractFactory.getOMFactory();
        OMElement endpointElement = fac.createOMElement("endpoint", SynapseConstants.SYNAPSE_OMNAMESPACE);


        LoadbalanceEndpoint loadbalanceEndpoint = (LoadbalanceEndpoint) endpoint;


        String name = loadbalanceEndpoint.getName();
        if (name != null) {
            endpointElement.addAttribute("name", name, null);
        }


        OMElement loadbalanceElement = fac.createOMElement("loadbalance", SynapseConstants.SYNAPSE_OMNAMESPACE);
        endpointElement.addChild(loadbalanceElement);


        LoadbalanceAlgorithm algorithm = loadbalanceEndpoint.getAlgorithm();
        String algorithmName = "roundRobin";
        if (algorithm instanceof RoundRobin) {
             algorithmName = "roundRobin";
        }
        loadbalanceElement.addAttribute
                (org.apache.synapse.config.xml.XMLConfigConstants.ALGORITHM_NAME, algorithmName, null);


        // set if failover is turned off in the endpoint
        if (!loadbalanceEndpoint.isFailover()) {
            loadbalanceElement.addAttribute("failover", "false", null);
        }


        List endpoints = loadbalanceEndpoint.getEndpoints();
        for (int i = 0; i < endpoints.size(); i++) {
            Endpoint childEndpoint = (Endpoint) endpoints.get(i);
            EndpointSerializer serializer = EndpointAbstractSerializer.
                    getEndpointSerializer(childEndpoint);
            OMElement aeElement = serializer.serializeEndpoint(childEndpoint);

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        loadbalanceElement = epConfig.getFirstChildWithName
                (new QName(SynapseConstants.SYNAPSE_NAMESPACE, "loadbalance"));


        if(loadbalanceElement != null) {


            LoadbalanceEndpoint loadbalanceEndpoint = new LoadbalanceEndpoint();


            // set endpoint name
            OMAttribute name = epConfig.getAttribute(new QName(
                    org.apache.synapse.config.xml.XMLConfigConstants.NULL_NAMESPACE, "name"));


            if (name != null) {
                loadbalanceEndpoint.setName(name.getAttributeValue());
            }


            // set endpoints
            ArrayList endpoints = getEndpoints(loadbalanceElement, loadbalanceEndpoint);
            loadbalanceEndpoint.setEndpoints(endpoints);


            // set load balance algorithm
            LoadbalanceAlgorithm algorithm = LoadbalanceAlgorithmFactory.
                    createLoadbalanceAlgorithm(loadbalanceElement, endpoints);
            loadbalanceEndpoint.setAlgorithm(algorithm);


            // set if failover is turned off
            String failover = loadbalanceElement.getAttributeValue(new QName("failover"));
            if (failover != null && failover.equalsIgnoreCase("false")) {
                loadbalanceEndpoint.setFailover(false);
            }


            return loadbalanceEndpoint;
        }

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        SendMediator send2 = (SendMediator) factory.createMediator(config2);


        assertTrue("Top level endpoint should be a load balance endpoint.",
                send2.getEndpoint() instanceof LoadbalanceEndpoint);


        LoadbalanceEndpoint endpoint = (LoadbalanceEndpoint) send2.getEndpoint();
        List addresses = endpoint.getEndpoints();
        assertEquals("There should be 3 leaf level address endpoints", addresses.size(), 3);


        assertTrue("Leaf level endpoints should be address endpoints",
                addresses.get(0) instanceof AddressEndpoint);
        assertTrue("Leaf level endpoints should be address endpoints",

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        SendMediator send2 = (SendMediator) factory.createMediator(config2);


        assertTrue("Top level endpoint should be a load balance endpoint.",
                send2.getEndpoint() instanceof LoadbalanceEndpoint);


        LoadbalanceEndpoint loadbalanceEndpoint = (LoadbalanceEndpoint) send2.getEndpoint();


        List children = loadbalanceEndpoint.getEndpoints();
        assertEquals("Top level endpoint should have 2 child endpoints.", children.size(), 2);


        assertTrue("First child should be a address endpoint",
                children.get(0) instanceof AddressEndpoint);

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