Examples of DiscoveryClient

com.netflix.discovery.DiscoveryClient

The class that is instrumental for interactions with Eureka Server.

Eureka Client is responsible for a) Registering the instance with Eureka Server b) Renewalof the lease with Eureka Server c) Cancellation of the lease from Eureka Server during shutdown

d) Querying the list of services/instances registered with Eureka Server

Eureka Client needs a configured list of Eureka Server {@link java.net.URL}s to talk to.These {@link java.net.URL}s are typically amazon elastic eips which do not change. All of the functions defined above fail-over to other {@link java.net.URL}s specified in the list in the case of failure.

@author Karthik Ranganathan, Greg Kim

org.rzo.netty.mcast.discovery.DiscoveryClient

org.wso2.carbon.discovery.client.DiscoveryClient

The WS-Discovery client API. This API can be used to probe external discovery proxies by sending WS-D probe requests. Also it can be used to WS-D resolve requests. This API is a wrapper for the Axis2 client API. Therefore Axis2 modules such as Addressing and Rampart can be enagaged on the DiscoveryClient to support various QoS requirements. However since the ServiceClient API of Axis2 is not intended to be thread safe, it is not recommended to use this class as a shared instance in a multithreaded setting.

            String msg = "No Discovery proxy has been configured at tenant level or global level";
            log.error(msg);
            throw new CarbonException(msg);
        }


        DiscoveryClient discoveryClient;
        try {
            discoveryClient = new DiscoveryClient(clientCfgCtx, proxyURLString);
        } catch (DiscoveryException e) {
            handleException("Error while initializing a Discovery client for the URL: " +
                        proxyURLString, e);
            return null;
        }


        Set<String> urlList = new HashSet<String>();
        Exception ex = null;


        try {
            TargetService[] services = discoveryClient.probe(types, scopes, matchingRule);
            if (services != null) {
                // The probe may have returned multiple services
                // Need to extract URLs from each of them
                for (TargetService service : services) {
                    if (service.getXAddresses() != null) {
                        for (URI uri : service.getXAddresses()) {
                            urlList.add(uri.toString());
                        }
                    }
                }
            }


        } catch (DiscoveryException e) {
            ex = e;
        } finally {
            try {
                discoveryClient.cleanup();
            } catch (DiscoveryException ignored) {
                // This one we let go by - We have completed the probe so we can return the URLs
                log.warn("Error while cleaning up the discovery client to URL: " + proxyURLString);
            }
        }

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Examples of DiscoveryClient

Examples of org.wso2.carbon.discovery.client.DiscoveryClient