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* HDS is Health Discovery Service. It compliments Envoy’s health checking
* service by designating this Envoy to be a healthchecker for a subset of hosts
* in the cluster. The status of these health checks will be reported to the
* management server, where it can be aggregated etc and redistributed back to
* Envoy through EDS.
*
*/
@javax.annotation.Generated(
value = "by gRPC proto compiler (version 1.48.1)",
comments = "Source: envoy/service/discovery/v2/hds.proto")
@io.grpc.stub.annotations.GrpcGenerated
public final class HealthDiscoveryServiceGrpc {
private HealthDiscoveryServiceGrpc() {}
public static final String SERVICE_NAME = "envoy.service.discovery.v2.HealthDiscoveryService";
// Static method descriptors that strictly reflect the proto.
private static volatile io.grpc.MethodDescriptor getStreamHealthCheckMethod;
@io.grpc.stub.annotations.RpcMethod(
fullMethodName = SERVICE_NAME + '/' + "StreamHealthCheck",
requestType = io.envoyproxy.envoy.service.discovery.v2.HealthCheckRequestOrEndpointHealthResponse.class,
responseType = io.envoyproxy.envoy.service.discovery.v2.HealthCheckSpecifier.class,
methodType = io.grpc.MethodDescriptor.MethodType.BIDI_STREAMING)
public static io.grpc.MethodDescriptor getStreamHealthCheckMethod() {
io.grpc.MethodDescriptor getStreamHealthCheckMethod;
if ((getStreamHealthCheckMethod = HealthDiscoveryServiceGrpc.getStreamHealthCheckMethod) == null) {
synchronized (HealthDiscoveryServiceGrpc.class) {
if ((getStreamHealthCheckMethod = HealthDiscoveryServiceGrpc.getStreamHealthCheckMethod) == null) {
HealthDiscoveryServiceGrpc.getStreamHealthCheckMethod = getStreamHealthCheckMethod =
io.grpc.MethodDescriptor.newBuilder()
.setType(io.grpc.MethodDescriptor.MethodType.BIDI_STREAMING)
.setFullMethodName(generateFullMethodName(SERVICE_NAME, "StreamHealthCheck"))
.setSampledToLocalTracing(true)
.setRequestMarshaller(io.grpc.protobuf.ProtoUtils.marshaller(
io.envoyproxy.envoy.service.discovery.v2.HealthCheckRequestOrEndpointHealthResponse.getDefaultInstance()))
.setResponseMarshaller(io.grpc.protobuf.ProtoUtils.marshaller(
io.envoyproxy.envoy.service.discovery.v2.HealthCheckSpecifier.getDefaultInstance()))
.setSchemaDescriptor(new HealthDiscoveryServiceMethodDescriptorSupplier("StreamHealthCheck"))
.build();
}
}
}
return getStreamHealthCheckMethod;
}
private static volatile io.grpc.MethodDescriptor getFetchHealthCheckMethod;
@io.grpc.stub.annotations.RpcMethod(
fullMethodName = SERVICE_NAME + '/' + "FetchHealthCheck",
requestType = io.envoyproxy.envoy.service.discovery.v2.HealthCheckRequestOrEndpointHealthResponse.class,
responseType = io.envoyproxy.envoy.service.discovery.v2.HealthCheckSpecifier.class,
methodType = io.grpc.MethodDescriptor.MethodType.UNARY)
public static io.grpc.MethodDescriptor getFetchHealthCheckMethod() {
io.grpc.MethodDescriptor getFetchHealthCheckMethod;
if ((getFetchHealthCheckMethod = HealthDiscoveryServiceGrpc.getFetchHealthCheckMethod) == null) {
synchronized (HealthDiscoveryServiceGrpc.class) {
if ((getFetchHealthCheckMethod = HealthDiscoveryServiceGrpc.getFetchHealthCheckMethod) == null) {
HealthDiscoveryServiceGrpc.getFetchHealthCheckMethod = getFetchHealthCheckMethod =
io.grpc.MethodDescriptor.newBuilder()
.setType(io.grpc.MethodDescriptor.MethodType.UNARY)
.setFullMethodName(generateFullMethodName(SERVICE_NAME, "FetchHealthCheck"))
.setSampledToLocalTracing(true)
.setRequestMarshaller(io.grpc.protobuf.ProtoUtils.marshaller(
io.envoyproxy.envoy.service.discovery.v2.HealthCheckRequestOrEndpointHealthResponse.getDefaultInstance()))
.setResponseMarshaller(io.grpc.protobuf.ProtoUtils.marshaller(
io.envoyproxy.envoy.service.discovery.v2.HealthCheckSpecifier.getDefaultInstance()))
.setSchemaDescriptor(new HealthDiscoveryServiceMethodDescriptorSupplier("FetchHealthCheck"))
.build();
}
}
}
return getFetchHealthCheckMethod;
}
/**
* Creates a new async stub that supports all call types for the service
*/
public static HealthDiscoveryServiceStub newStub(io.grpc.Channel channel) {
io.grpc.stub.AbstractStub.StubFactory factory =
new io.grpc.stub.AbstractStub.StubFactory() {
@java.lang.Override
public HealthDiscoveryServiceStub newStub(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
return new HealthDiscoveryServiceStub(channel, callOptions);
}
};
return HealthDiscoveryServiceStub.newStub(factory, channel);
}
/**
* Creates a new blocking-style stub that supports unary and streaming output calls on the service
*/
public static HealthDiscoveryServiceBlockingStub newBlockingStub(
io.grpc.Channel channel) {
io.grpc.stub.AbstractStub.StubFactory factory =
new io.grpc.stub.AbstractStub.StubFactory() {
@java.lang.Override
public HealthDiscoveryServiceBlockingStub newStub(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
return new HealthDiscoveryServiceBlockingStub(channel, callOptions);
}
};
return HealthDiscoveryServiceBlockingStub.newStub(factory, channel);
}
/**
* Creates a new ListenableFuture-style stub that supports unary calls on the service
*/
public static HealthDiscoveryServiceFutureStub newFutureStub(
io.grpc.Channel channel) {
io.grpc.stub.AbstractStub.StubFactory factory =
new io.grpc.stub.AbstractStub.StubFactory() {
@java.lang.Override
public HealthDiscoveryServiceFutureStub newStub(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
return new HealthDiscoveryServiceFutureStub(channel, callOptions);
}
};
return HealthDiscoveryServiceFutureStub.newStub(factory, channel);
}
/**
*
* HDS is Health Discovery Service. It compliments Envoy’s health checking
* service by designating this Envoy to be a healthchecker for a subset of hosts
* in the cluster. The status of these health checks will be reported to the
* management server, where it can be aggregated etc and redistributed back to
* Envoy through EDS.
*
*/
public static abstract class HealthDiscoveryServiceImplBase implements io.grpc.BindableService {
/**
*
* 1. Envoy starts up and if its can_healthcheck option in the static
* bootstrap config is enabled, sends HealthCheckRequest to the management
* server. It supplies its capabilities (which protocol it can health check
* with, what zone it resides in, etc.).
* 2. In response to (1), the management server designates this Envoy as a
* healthchecker to health check a subset of all upstream hosts for a given
* cluster (for example upstream Host 1 and Host 2). It streams
* HealthCheckSpecifier messages with cluster related configuration for all
* clusters this Envoy is designated to health check. Subsequent
* HealthCheckSpecifier message will be sent on changes to:
* a. Endpoints to health checks
* b. Per cluster configuration change
* 3. Envoy creates a health probe based on the HealthCheck config and sends
* it to endpoint(ip:port) of Host 1 and 2. Based on the HealthCheck
* configuration Envoy waits upon the arrival of the probe response and
* looks at the content of the response to decide whether the endpoint is
* healthy or not. If a response hasn't been received within the timeout
* interval, the endpoint health status is considered TIMEOUT.
* 4. Envoy reports results back in an EndpointHealthResponse message.
* Envoy streams responses as often as the interval configured by the
* management server in HealthCheckSpecifier.
* 5. The management Server collects health statuses for all endpoints in the
* cluster (for all clusters) and uses this information to construct
* EndpointDiscoveryResponse messages.
* 6. Once Envoy has a list of upstream endpoints to send traffic to, it load
* balances traffic to them without additional health checking. It may
* use inline healthcheck (i.e. consider endpoint UNHEALTHY if connection
* failed to a particular endpoint to account for health status propagation
* delay between HDS and EDS).
* By default, can_healthcheck is true. If can_healthcheck is false, Cluster
* configuration may not contain HealthCheck message.
* TODO(htuch): How is can_healthcheck communicated to CDS to ensure the above
* invariant?
* TODO(htuch): Add @amb67's diagram.
*
* TODO(htuch): Unlike the gRPC version, there is no stream-based binding of
* request/response. Should we add an identifier to the HealthCheckSpecifier
* to bind with the response?
*
*/
public void fetchHealthCheck(io.envoyproxy.envoy.service.discovery.v2.HealthCheckRequestOrEndpointHealthResponse request,
io.grpc.stub.StreamObserver responseObserver) {
io.grpc.stub.ServerCalls.asyncUnimplementedUnaryCall(getFetchHealthCheckMethod(), responseObserver);
}
@java.lang.Override public final io.grpc.ServerServiceDefinition bindService() {
return io.grpc.ServerServiceDefinition.builder(getServiceDescriptor())
.addMethod(
getStreamHealthCheckMethod(),
io.grpc.stub.ServerCalls.asyncBidiStreamingCall(
new MethodHandlers<
io.envoyproxy.envoy.service.discovery.v2.HealthCheckRequestOrEndpointHealthResponse,
io.envoyproxy.envoy.service.discovery.v2.HealthCheckSpecifier>(
this, METHODID_STREAM_HEALTH_CHECK)))
.addMethod(
getFetchHealthCheckMethod(),
io.grpc.stub.ServerCalls.asyncUnaryCall(
new MethodHandlers<
io.envoyproxy.envoy.service.discovery.v2.HealthCheckRequestOrEndpointHealthResponse,
io.envoyproxy.envoy.service.discovery.v2.HealthCheckSpecifier>(
this, METHODID_FETCH_HEALTH_CHECK)))
.build();
}
}
/**
*
* HDS is Health Discovery Service. It compliments Envoy’s health checking
* service by designating this Envoy to be a healthchecker for a subset of hosts
* in the cluster. The status of these health checks will be reported to the
* management server, where it can be aggregated etc and redistributed back to
* Envoy through EDS.
*
*/
public static final class HealthDiscoveryServiceStub extends io.grpc.stub.AbstractAsyncStub {
private HealthDiscoveryServiceStub(
io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
super(channel, callOptions);
}
@java.lang.Override
protected HealthDiscoveryServiceStub build(
io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
return new HealthDiscoveryServiceStub(channel, callOptions);
}
/**
*
* 1. Envoy starts up and if its can_healthcheck option in the static
* bootstrap config is enabled, sends HealthCheckRequest to the management
* server. It supplies its capabilities (which protocol it can health check
* with, what zone it resides in, etc.).
* 2. In response to (1), the management server designates this Envoy as a
* healthchecker to health check a subset of all upstream hosts for a given
* cluster (for example upstream Host 1 and Host 2). It streams
* HealthCheckSpecifier messages with cluster related configuration for all
* clusters this Envoy is designated to health check. Subsequent
* HealthCheckSpecifier message will be sent on changes to:
* a. Endpoints to health checks
* b. Per cluster configuration change
* 3. Envoy creates a health probe based on the HealthCheck config and sends
* it to endpoint(ip:port) of Host 1 and 2. Based on the HealthCheck
* configuration Envoy waits upon the arrival of the probe response and
* looks at the content of the response to decide whether the endpoint is
* healthy or not. If a response hasn't been received within the timeout
* interval, the endpoint health status is considered TIMEOUT.
* 4. Envoy reports results back in an EndpointHealthResponse message.
* Envoy streams responses as often as the interval configured by the
* management server in HealthCheckSpecifier.
* 5. The management Server collects health statuses for all endpoints in the
* cluster (for all clusters) and uses this information to construct
* EndpointDiscoveryResponse messages.
* 6. Once Envoy has a list of upstream endpoints to send traffic to, it load
* balances traffic to them without additional health checking. It may
* use inline healthcheck (i.e. consider endpoint UNHEALTHY if connection
* failed to a particular endpoint to account for health status propagation
* delay between HDS and EDS).
* By default, can_healthcheck is true. If can_healthcheck is false, Cluster
* configuration may not contain HealthCheck message.
* TODO(htuch): How is can_healthcheck communicated to CDS to ensure the above
* invariant?
* TODO(htuch): Add @amb67's diagram.
*
* TODO(htuch): Unlike the gRPC version, there is no stream-based binding of
* request/response. Should we add an identifier to the HealthCheckSpecifier
* to bind with the response?
*
* HDS is Health Discovery Service. It compliments Envoy’s health checking
* service by designating this Envoy to be a healthchecker for a subset of hosts
* in the cluster. The status of these health checks will be reported to the
* management server, where it can be aggregated etc and redistributed back to
* Envoy through EDS.
*
*/
public static final class HealthDiscoveryServiceBlockingStub extends io.grpc.stub.AbstractBlockingStub {
private HealthDiscoveryServiceBlockingStub(
io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
super(channel, callOptions);
}
@java.lang.Override
protected HealthDiscoveryServiceBlockingStub build(
io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
return new HealthDiscoveryServiceBlockingStub(channel, callOptions);
}
/**
*
* TODO(htuch): Unlike the gRPC version, there is no stream-based binding of
* request/response. Should we add an identifier to the HealthCheckSpecifier
* to bind with the response?
*
* HDS is Health Discovery Service. It compliments Envoy’s health checking
* service by designating this Envoy to be a healthchecker for a subset of hosts
* in the cluster. The status of these health checks will be reported to the
* management server, where it can be aggregated etc and redistributed back to
* Envoy through EDS.
*
*/
public static final class HealthDiscoveryServiceFutureStub extends io.grpc.stub.AbstractFutureStub {
private HealthDiscoveryServiceFutureStub(
io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
super(channel, callOptions);
}
@java.lang.Override
protected HealthDiscoveryServiceFutureStub build(
io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
return new HealthDiscoveryServiceFutureStub(channel, callOptions);
}
/**
*
* TODO(htuch): Unlike the gRPC version, there is no stream-based binding of
* request/response. Should we add an identifier to the HealthCheckSpecifier
* to bind with the response?
*
*/
public com.google.common.util.concurrent.ListenableFuture fetchHealthCheck(
io.envoyproxy.envoy.service.discovery.v2.HealthCheckRequestOrEndpointHealthResponse request) {
return io.grpc.stub.ClientCalls.futureUnaryCall(
getChannel().newCall(getFetchHealthCheckMethod(), getCallOptions()), request);
}
}
private static final int METHODID_FETCH_HEALTH_CHECK = 0;
private static final int METHODID_STREAM_HEALTH_CHECK = 1;
private static final class MethodHandlers implements
io.grpc.stub.ServerCalls.UnaryMethod,
io.grpc.stub.ServerCalls.ServerStreamingMethod,
io.grpc.stub.ServerCalls.ClientStreamingMethod,
io.grpc.stub.ServerCalls.BidiStreamingMethod {
private final HealthDiscoveryServiceImplBase serviceImpl;
private final int methodId;
MethodHandlers(HealthDiscoveryServiceImplBase serviceImpl, int methodId) {
this.serviceImpl = serviceImpl;
this.methodId = methodId;
}
@java.lang.Override
@java.lang.SuppressWarnings("unchecked")
public void invoke(Req request, io.grpc.stub.StreamObserver responseObserver) {
switch (methodId) {
case METHODID_FETCH_HEALTH_CHECK:
serviceImpl.fetchHealthCheck((io.envoyproxy.envoy.service.discovery.v2.HealthCheckRequestOrEndpointHealthResponse) request,
(io.grpc.stub.StreamObserver) responseObserver);
break;
default:
throw new AssertionError();
}
}
@java.lang.Override
@java.lang.SuppressWarnings("unchecked")
public io.grpc.stub.StreamObserver invoke(
io.grpc.stub.StreamObserver responseObserver) {
switch (methodId) {
case METHODID_STREAM_HEALTH_CHECK:
return (io.grpc.stub.StreamObserver) serviceImpl.streamHealthCheck(
(io.grpc.stub.StreamObserver) responseObserver);
default:
throw new AssertionError();
}
}
}
private static abstract class HealthDiscoveryServiceBaseDescriptorSupplier
implements io.grpc.protobuf.ProtoFileDescriptorSupplier, io.grpc.protobuf.ProtoServiceDescriptorSupplier {
HealthDiscoveryServiceBaseDescriptorSupplier() {}
@java.lang.Override
public com.google.protobuf.Descriptors.FileDescriptor getFileDescriptor() {
return io.envoyproxy.envoy.service.discovery.v2.HdsProto.getDescriptor();
}
@java.lang.Override
public com.google.protobuf.Descriptors.ServiceDescriptor getServiceDescriptor() {
return getFileDescriptor().findServiceByName("HealthDiscoveryService");
}
}
private static final class HealthDiscoveryServiceFileDescriptorSupplier
extends HealthDiscoveryServiceBaseDescriptorSupplier {
HealthDiscoveryServiceFileDescriptorSupplier() {}
}
private static final class HealthDiscoveryServiceMethodDescriptorSupplier
extends HealthDiscoveryServiceBaseDescriptorSupplier
implements io.grpc.protobuf.ProtoMethodDescriptorSupplier {
private final String methodName;
HealthDiscoveryServiceMethodDescriptorSupplier(String methodName) {
this.methodName = methodName;
}
@java.lang.Override
public com.google.protobuf.Descriptors.MethodDescriptor getMethodDescriptor() {
return getServiceDescriptor().findMethodByName(methodName);
}
}
private static volatile io.grpc.ServiceDescriptor serviceDescriptor;
public static io.grpc.ServiceDescriptor getServiceDescriptor() {
io.grpc.ServiceDescriptor result = serviceDescriptor;
if (result == null) {
synchronized (HealthDiscoveryServiceGrpc.class) {
result = serviceDescriptor;
if (result == null) {
serviceDescriptor = result = io.grpc.ServiceDescriptor.newBuilder(SERVICE_NAME)
.setSchemaDescriptor(new HealthDiscoveryServiceFileDescriptorSupplier())
.addMethod(getStreamHealthCheckMethod())
.addMethod(getFetchHealthCheckMethod())
.build();
}
}
}
return result;
}
}
