forked from grpc/grpc-java
/
XdsTestServer.java
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/
XdsTestServer.java
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/*
* Copyright 2020 The gRPC Authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package io.grpc.testing.integration;
import io.grpc.Context;
import io.grpc.Contexts;
import io.grpc.ForwardingServerCall.SimpleForwardingServerCall;
import io.grpc.InsecureServerCredentials;
import io.grpc.Metadata;
import io.grpc.Server;
import io.grpc.ServerCall;
import io.grpc.ServerCallHandler;
import io.grpc.ServerInterceptor;
import io.grpc.ServerInterceptors;
import io.grpc.Status;
import io.grpc.StatusRuntimeException;
import io.grpc.health.v1.HealthCheckResponse.ServingStatus;
import io.grpc.netty.NettyServerBuilder;
import io.grpc.protobuf.services.HealthStatusManager;
import io.grpc.protobuf.services.ProtoReflectionService;
import io.grpc.services.AdminInterface;
import io.grpc.stub.StreamObserver;
import io.grpc.testing.integration.Messages.SimpleRequest;
import io.grpc.testing.integration.Messages.SimpleResponse;
import io.grpc.xds.XdsServerBuilder;
import io.grpc.xds.XdsServerCredentials;
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.util.concurrent.TimeUnit;
import java.util.logging.Level;
import java.util.logging.Logger;
/** Interop test server that implements the xDS testing service. */
public final class XdsTestServer {
static final Metadata.Key<String> HOSTNAME_KEY =
Metadata.Key.of("hostname", Metadata.ASCII_STRING_MARSHALLER);
private static final Metadata.Key<String> CALL_BEHAVIOR_MD_KEY =
Metadata.Key.of("rpc-behavior", Metadata.ASCII_STRING_MARSHALLER);
private static final Context.Key<String> CALL_BEHAVIOR_KEY =
Context.key("rpc-behavior");
private static final String CALL_BEHAVIOR_KEEP_OPEN_VALUE = "keep-open";
private static final String CALL_BEHAVIOR_SLEEP_VALUE = "sleep-";
private static Logger logger = Logger.getLogger(XdsTestServer.class.getName());
private int port = 8080;
private int maintenancePort = 8080;
private boolean secureMode = false;
private String serverId = "java_server";
private HealthStatusManager health;
private Server server;
private Server maintenanceServer;
private String host;
/**
* The main application allowing this client to be launched from the command line.
*/
public static void main(String[] args) throws Exception {
final XdsTestServer server = new XdsTestServer();
server.parseArgs(args);
Runtime.getRuntime()
.addShutdownHook(
new Thread() {
@Override
@SuppressWarnings("CatchAndPrintStackTrace")
public void run() {
try {
System.out.println("Shutting down");
server.stop();
} catch (Exception e) {
e.printStackTrace();
}
}
});
server.start();
System.out.println("Server started on port " + server.port);
server.blockUntilShutdown();
}
private void parseArgs(String[] args) {
boolean usage = false;
for (String arg : args) {
if (!arg.startsWith("--")) {
System.err.println("All arguments must start with '--': " + arg);
usage = true;
break;
}
String[] parts = arg.substring(2).split("=", 2);
String key = parts[0];
if ("help".equals(key)) {
usage = true;
break;
}
if (parts.length != 2) {
System.err.println("All arguments must be of the form --arg=value");
usage = true;
break;
}
String value = parts[1];
if ("port".equals(key)) {
port = Integer.valueOf(value);
} else if ("maintenance_port".equals(key)) {
maintenancePort = Integer.valueOf(value);
} else if ("secure_mode".equals(key)) {
secureMode = Boolean.parseBoolean(value);
} else if ("server_id".equals(key)) {
serverId = value;
} else {
System.err.println("Unknown argument: " + key);
usage = true;
break;
}
}
if (secureMode && (port == maintenancePort)) {
System.err.println(
"port and maintenance_port should be different for secure mode: port="
+ port
+ ", maintenance_port="
+ maintenancePort);
usage = true;
}
if (usage) {
XdsTestServer s = new XdsTestServer();
System.err.println(
"Usage: [ARGS...]"
+ "\n"
+ "\n --port=INT listening port for test server."
+ "\n Default: "
+ s.port
+ "\n --maintenance_port=INT listening port for other servers."
+ "\n Default: "
+ s.maintenancePort
+ "\n --secure_mode=BOOLEAN Use true to enable XdsCredentials."
+ " port and maintenance_port should be different for secure mode."
+ "\n Default: "
+ s.secureMode
+ "\n --server_id=STRING server ID for response."
+ "\n Default: "
+ s.serverId);
System.exit(1);
}
}
private void start() throws Exception {
try {
host = InetAddress.getLocalHost().getHostName();
} catch (UnknownHostException e) {
logger.log(Level.SEVERE, "Failed to get host", e);
throw new RuntimeException(e);
}
health = new HealthStatusManager();
if (secureMode) {
server =
XdsServerBuilder.forPort(
port, XdsServerCredentials.create(InsecureServerCredentials.create()))
.addService(
ServerInterceptors.intercept(
new TestServiceImpl(serverId, host), new TestInfoInterceptor(host)))
.build()
.start();
maintenanceServer =
NettyServerBuilder.forPort(maintenancePort)
.addService(new XdsUpdateHealthServiceImpl(health))
.addService(health.getHealthService())
.addService(ProtoReflectionService.newInstance())
.addServices(AdminInterface.getStandardServices())
.build()
.start();
} else {
server =
NettyServerBuilder.forPort(port)
.addService(
ServerInterceptors.intercept(
new TestServiceImpl(serverId, host), new TestInfoInterceptor(host)))
.addService(new XdsUpdateHealthServiceImpl(health))
.addService(health.getHealthService())
.addService(ProtoReflectionService.newInstance())
.addServices(AdminInterface.getStandardServices())
.build()
.start();
maintenanceServer = null;
}
health.setStatus("", ServingStatus.SERVING);
}
private void stop() throws Exception {
server.shutdownNow();
if (maintenanceServer != null) {
maintenanceServer.shutdownNow();
}
if (!server.awaitTermination(5, TimeUnit.SECONDS)) {
System.err.println("Timed out waiting for server shutdown");
}
if (maintenanceServer != null && !maintenanceServer.awaitTermination(5, TimeUnit.SECONDS)) {
System.err.println("Timed out waiting for maintenanceServer shutdown");
}
}
private void blockUntilShutdown() throws InterruptedException {
if (server != null) {
server.awaitTermination();
}
if (maintenanceServer != null) {
maintenanceServer.awaitTermination();
}
}
private static class TestServiceImpl extends TestServiceGrpc.TestServiceImplBase {
private final String serverId;
private final String host;
private TestServiceImpl(String serverId, String host) {
this.serverId = serverId;
this.host = host;
}
@Override
public void emptyCall(
EmptyProtos.Empty req, StreamObserver<EmptyProtos.Empty> responseObserver) {
responseObserver.onNext(EmptyProtos.Empty.getDefaultInstance());
if (!CALL_BEHAVIOR_KEEP_OPEN_VALUE.equals(CALL_BEHAVIOR_KEY.get())) {
responseObserver.onCompleted();
}
}
@Override
public void unaryCall(SimpleRequest req, StreamObserver<SimpleResponse> responseObserver) {
responseObserver.onNext(
SimpleResponse.newBuilder().setServerId(serverId).setHostname(host).build());
if (!CALL_BEHAVIOR_KEEP_OPEN_VALUE.equals(CALL_BEHAVIOR_KEY.get())) {
responseObserver.onCompleted();
}
}
}
private static class XdsUpdateHealthServiceImpl
extends XdsUpdateHealthServiceGrpc.XdsUpdateHealthServiceImplBase {
private HealthStatusManager health;
private XdsUpdateHealthServiceImpl(HealthStatusManager health) {
this.health = health;
}
@Override
public void setServing(
EmptyProtos.Empty req, StreamObserver<EmptyProtos.Empty> responseObserver) {
health.setStatus("", ServingStatus.SERVING);
responseObserver.onNext(EmptyProtos.Empty.getDefaultInstance());
responseObserver.onCompleted();
}
@Override
public void setNotServing(
EmptyProtos.Empty req, StreamObserver<EmptyProtos.Empty> responseObserver) {
health.setStatus("", ServingStatus.NOT_SERVING);
responseObserver.onNext(EmptyProtos.Empty.getDefaultInstance());
responseObserver.onCompleted();
}
}
private static class TestInfoInterceptor implements ServerInterceptor {
private final String host;
private TestInfoInterceptor(String host) {
this.host = host;
}
@Override
public <ReqT, RespT> ServerCall.Listener<ReqT> interceptCall(
ServerCall<ReqT, RespT> call,
final Metadata requestHeaders,
ServerCallHandler<ReqT, RespT> next) {
String callBehavior = requestHeaders.get(CALL_BEHAVIOR_MD_KEY);
Context newContext = Context.current().withValue(CALL_BEHAVIOR_KEY, callBehavior);
if (callBehavior != null && callBehavior.startsWith(CALL_BEHAVIOR_SLEEP_VALUE)) {
try {
int timeout = Integer.parseInt(
callBehavior.substring(CALL_BEHAVIOR_SLEEP_VALUE.length()));
Thread.sleep(timeout * 1000);
} catch (NumberFormatException e) {
throw new StatusRuntimeException(
Status.INVALID_ARGUMENT.withDescription(
String.format("Invalid format for rpc-behavior header (%s)", callBehavior)));
} catch (InterruptedException e) {
throw new StatusRuntimeException(
Status.ABORTED.withDescription("execution of server interrupted"));
}
}
ServerCall<ReqT, RespT> newCall = new SimpleForwardingServerCall<ReqT, RespT>(call) {
@Override
public void sendHeaders(Metadata responseHeaders) {
responseHeaders.put(HOSTNAME_KEY, host);
super.sendHeaders(responseHeaders);
}
};
return Contexts.interceptCall(newContext, newCall, requestHeaders, next);
}
}
}