Java Code Examples for org.apache.curator.x.discovery.ServiceDiscovery#queryForInstances()
The following examples show how to use
org.apache.curator.x.discovery.ServiceDiscovery#queryForInstances() .
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Example 1
| Source File: DiscoveryExample.java From xian with Apache License 2.0 | 6 votes |
|
private static void listInstances(ServiceDiscovery<InstanceDetails> serviceDiscovery) throws Exception
{
// This shows how to query all the instances in group discovery
try
{
Collection<String> serviceNames = serviceDiscovery.queryForNames();
System.out.println(serviceNames.size() + " type(s)");
for ( String serviceName : serviceNames )
{
Collection<ServiceInstance<InstanceDetails>> instances = serviceDiscovery.queryForInstances(serviceName);
System.out.println(serviceName);
for ( ServiceInstance<InstanceDetails> instance : instances )
{
outputInstance(instance);
}
}
}
finally
{
CloseableUtils.closeQuietly(serviceDiscovery);
}
}
Example 2
| Source File: DiscoveryExample.java From curator with Apache License 2.0 | 6 votes |
|
private static void listInstances(ServiceDiscovery<InstanceDetails> serviceDiscovery) throws Exception
{
// This shows how to query all the instances in service discovery
try
{
Collection<String> serviceNames = serviceDiscovery.queryForNames();
System.out.println(serviceNames.size() + " type(s)");
for ( String serviceName : serviceNames )
{
Collection<ServiceInstance<InstanceDetails>> instances = serviceDiscovery.queryForInstances(serviceName);
System.out.println(serviceName);
for ( ServiceInstance<InstanceDetails> instance : instances )
{
outputInstance(instance);
}
}
}
finally
{
CloseableUtils.closeQuietly(serviceDiscovery);
}
}
Example 3
| Source File: DiscoveryExample.java From ZKRecipesByExample with Apache License 2.0 | 6 votes |
|
private static void listInstances(ServiceDiscovery<InstanceDetails> serviceDiscovery) throws Exception {
// This shows how to query all the instances in service discovery
try {
Collection<String> serviceNames = serviceDiscovery.queryForNames();
System.out.println(serviceNames.size() + " type(s)");
for (String serviceName : serviceNames) {
Collection<ServiceInstance<InstanceDetails>> instances = serviceDiscovery.queryForInstances(serviceName);
System.out.println(serviceName);
for (ServiceInstance<InstanceDetails> instance : instances) {
outputInstance(instance);
}
}
} finally {
CloseableUtils.closeQuietly(serviceDiscovery);
}
}
Example 4
| Source File: CamelCloudZookeeperServiceRegistryTest.java From camel-spring-boot with Apache License 2.0 | 4 votes |
|
@Test
public void testServiceRegistry() throws Exception {
final ZookeeperServer server = new ZookeeperServer(temporaryFolder.newFolder(testName.getMethodName()));
ConfigurableApplicationContext context = new SpringApplicationBuilder(TestConfiguration.class)
.web(WebApplicationType.NONE)
.run(
"--debug=false",
"--spring.main.banner-mode=OFF",
"--spring.application.name=" + UUID.randomUUID().toString(),
"--ribbon.enabled=false",
"--ribbon.eureka.enabled=false",
"--management.endpoint.enabled=false",
"--spring.cloud.zookeeper.enabled=true",
"--spring.cloud.zookeeper.connect-string=" + server.connectString(),
"--spring.cloud.zookeeper.config.enabled=false",
"--spring.cloud.zookeeper.discovery.enabled=true",
"--spring.cloud.service-registry.auto-registration.enabled=false",
"--camel.cloud.service-registry.service-host=" + SERVICE_HOST
);
try {
final ServiceDiscovery client = context.getBean(ServiceDiscovery.class);
final ServiceRegistry registry = context.getBean(ServiceRegistry.class);
registry.register(
DefaultServiceDefinition.builder()
.withHost(SERVICE_HOST)
.withPort(SERVICE_PORT)
.withName(SERVICE_NAME)
.withId(SERVICE_ID)
.build()
);
Collection<ServiceInstance<ZookeeperInstance>> services = client.queryForInstances(SERVICE_NAME);
assertThat(services).hasSize(1);
assertThat(services).first().hasFieldOrPropertyWithValue("address", SERVICE_HOST);
assertThat(services).first().hasFieldOrPropertyWithValue("port", SERVICE_PORT);
assertThat(services).first().extracting("payload").hasFieldOrPropertyWithValue("id", SERVICE_ID);
assertThat(services).first().extracting("payload").hasFieldOrPropertyWithValue("name", SERVICE_NAME);
} finally {
// shutdown spring context
context.close();
// shutdown zookeeper
server.shutdown();
}
}
Example 5
| Source File: CuratorSchedulerTest.java From kylin-on-parquet-v2 with Apache License 2.0 | 4 votes |
|
@Test
public void test() throws Exception {
final String zkString = zkTestServer.getConnectString();
ServiceDiscovery<LinkedHashMap> serviceDiscovery = null;
CuratorFramework curatorClient = null;
try {
final CuratorScheduler.JsonInstanceSerializer<LinkedHashMap> serializer = new CuratorScheduler.JsonInstanceSerializer<>(
LinkedHashMap.class);
String servicePath = CuratorScheduler.KYLIN_SERVICE_PATH;
curatorClient = ZKUtil.newZookeeperClient(zkString, new ExponentialBackoffRetry(3000, 3));
serviceDiscovery = ServiceDiscoveryBuilder.builder(LinkedHashMap.class).client(curatorClient)
.basePath(servicePath).serializer(serializer).build();
serviceDiscovery.start();
final ExampleServer server1 = new ExampleServer("localhost:1111");
final ExampleServer server2 = new ExampleServer("localhost:2222");
Collection<String> serviceNames = serviceDiscovery.queryForNames();
Assert.assertTrue(serviceNames.size() == 1);
Assert.assertTrue(CuratorScheduler.SERVICE_NAME.equals(serviceNames.iterator().next()));
Collection<ServiceInstance<LinkedHashMap>> instances = serviceDiscovery
.queryForInstances(CuratorScheduler.SERVICE_NAME);
Assert.assertTrue(instances.size() == 2);
List<ServiceInstance<LinkedHashMap>> instancesList = Lists.newArrayList(instances);
final List<String> instanceNodes = Lists.transform(instancesList,
new Function<ServiceInstance<LinkedHashMap>, String>() {
@Nullable
@Override
public String apply(@Nullable ServiceInstance<LinkedHashMap> stringServiceInstance) {
return (String) stringServiceInstance.getPayload()
.get(CuratorScheduler.SERVICE_PAYLOAD_DESCRIPTION);
}
});
Assert.assertTrue(instanceNodes.contains(server1.getAddress() + ":query"));
Assert.assertTrue(instanceNodes.contains(server2.getAddress() + ":query"));
// stop one server
server1.close();
instances = serviceDiscovery.queryForInstances(CuratorScheduler.SERVICE_NAME);
Assert.assertTrue(instances.size() == 1);
Assert.assertEquals(server2.getAddress() + ":query",
instances.iterator().next().getPayload().get(CuratorScheduler.SERVICE_PAYLOAD_DESCRIPTION));
// all stop
server2.close();
instances = serviceDiscovery.queryForInstances(CuratorScheduler.SERVICE_NAME);
Assert.assertTrue(instances.size() == 0);
} finally {
CloseableUtils.closeQuietly(serviceDiscovery);
CloseableUtils.closeQuietly(curatorClient);
}
}
Example 6
| Source File: ConsumerClient.java From BigData-In-Practice with Apache License 2.0 | 4 votes |
|
public static void main(String[] args) throws Exception {
ServiceDiscovery<InstanceDetails> serviceDiscovery;
try (CuratorFramework client = ZKUtils.getClient()) {
client.start();
client.blockUntilConnected();
serviceDiscovery = ServiceDiscoveryBuilder.builder(InstanceDetails.class)
.client(client)
.basePath(InstanceDetails.ROOT_PATH)
.serializer(new JsonInstanceSerializer<InstanceDetails>(InstanceDetails.class))
.build();
}
serviceDiscovery.start();
boolean flag = true;
// 死循环来不停的获取服务列表,查看是否有新服务发布
while (flag) {
//根据名称获取服务
Collection<ServiceInstance<InstanceDetails>> services = serviceDiscovery.queryForInstances("OrderService");
if (services.size() == 0) {
System.out.println("当前没有发现服务");
Thread.sleep(10 * 1000);
continue;
}
for (ServiceInstance<InstanceDetails> service : services) {
//获取请求的scheme 例如：http://127.0.0.1:8080
String uriSpec = service.buildUriSpec();
//获取服务的其他信息
InstanceDetails payload = service.getPayload();
//服务描述
String serviceDesc = payload.getServiceDesc();
//获取该服务下的所有接口
Map<String, InstanceDetails.Service> allService = payload.getServices();
Set<Map.Entry<String, InstanceDetails.Service>> entries = allService.entrySet();
for (Map.Entry<String, InstanceDetails.Service> entry : entries) {
System.out.println(serviceDesc + uriSpec
+ "/" + service.getName()
+ "/" + entry.getKey()
+ " 该方法需要的参数为："
+ entry.getValue().getParams().toString());
}
}
System.out.println("---------------------");
Thread.sleep(10 * 1000);
}
}
Example 7
| Source File: KylinServerDiscoveryTest.java From kylin with Apache License 2.0 | 4 votes |
|
@Test
public void test() throws Exception {
final String zkString = zkTestServer.getConnectString();
ServiceDiscovery<LinkedHashMap> serviceDiscovery = null;
CuratorFramework curatorClient = null;
try {
String servicePath = KylinServerDiscovery.SERVICE_PATH;
final KylinServerDiscovery.JsonInstanceSerializer<LinkedHashMap> serializer =
new KylinServerDiscovery.JsonInstanceSerializer<>(LinkedHashMap.class);
curatorClient = ZKUtil.newZookeeperClient(zkString, new ExponentialBackoffRetry(3000, 3));
serviceDiscovery = ServiceDiscoveryBuilder.builder(LinkedHashMap.class).client(curatorClient)
.basePath(servicePath).serializer(serializer).build();
serviceDiscovery.start();
final ExampleServer server1 = new ExampleServer("localhost:1111");
final ExampleServer server2 = new ExampleServer("localhost:2222");
Collection<String> serviceNames = serviceDiscovery.queryForNames();
Assert.assertTrue(serviceNames.size() == 1);
Assert.assertTrue(KylinServerDiscovery.SERVICE_NAME.equals(serviceNames.iterator().next()));
Collection<ServiceInstance<LinkedHashMap>> instances = serviceDiscovery
.queryForInstances(KylinServerDiscovery.SERVICE_NAME);
Assert.assertTrue(instances.size() == 2);
List<ServiceInstance<LinkedHashMap>> instancesList = Lists.newArrayList(instances);
final List<String> instanceNodes = instancesList.stream()
.map(input -> input.getAddress() + ":" + input.getPort() + ":"
+ input.getPayload().get(KylinServerDiscovery.SERVICE_PAYLOAD_DESCRIPTION))
.collect(Collectors.toList());
Assert.assertTrue(instanceNodes.contains(server1.getAddress() + ":query"));
Assert.assertTrue(instanceNodes.contains(server2.getAddress() + ":query"));
// stop one server
server1.close();
instances = serviceDiscovery.queryForInstances(KylinServerDiscovery.SERVICE_NAME);
ServiceInstance<LinkedHashMap> existingInstance = instances.iterator().next();
Assert.assertTrue(instances.size() == 1);
Assert.assertEquals(server2.getAddress() + ":query",
existingInstance.getAddress() + ":" + existingInstance.getPort() + ":"
+ existingInstance.getPayload().get(KylinServerDiscovery.SERVICE_PAYLOAD_DESCRIPTION));
// all stop
server2.close();
instances = serviceDiscovery.queryForInstances(KylinServerDiscovery.SERVICE_NAME);
Assert.assertTrue(instances.size() == 0);
} finally {
CloseableUtils.closeQuietly(serviceDiscovery);
CloseableUtils.closeQuietly(curatorClient);
}
}
